Remove libGLU

It's been moved to its own repository, found at
	http://cgit.freedesktop.org/mesa/glu/

Acked-by: Kenneth Graunke <[email protected]>

158 files changed, 0 insertions, 39510 deletions

diff --git a/src/glu/sgi/libnurbs/interface/bezierEval.cc b/src/glu/sgi/libnurbs/interface/bezierEval.cc
deleted file mode 100644
index b414f535f95..00000000000
--- a/src/glu/sgi/libnurbs/interface/bezierEval.cc
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <assert.h>
-#include <math.h>
-#include "bezierEval.h"
-
-#ifdef __WATCOMC__
-#pragma warning 14  10
-#endif
-
-#define TOLERANCE 0.0001
-
-#ifndef MAX_ORDER
-#define MAX_ORDER 16
-#endif
-
-#ifndef MAX_DIMENSION
-#define MAX_DIMENSION 4
-#endif
-
-static void normalize(float vec[3]);
-static void crossProduct(float x[3], float y[3], float ret[3]);
-#if 0 // UNUSED
-static void bezierCurveEvalfast(float u0, float u1, int order, float *ctlpoints, int stride,  int dimension, float u, float retpoint[]);
-#endif
-
-static float binomialCoefficients[8][8] = {
-  {1,0,0,0,0,0,0,0},
-  {1,1,0,0,0,0,0,0},
-  {1,2,1,0,0,0,0,0},
-  {1,3,3,1,0,0,0,0},
-  {1,4,6,4,1,0,0,0},
-  {1,5,10,10,5,1,0,0},
-  {1,6,15,20,15,6,1,0},
-  {1,7,21,35,35,21,7,1}
-};
-
-void bezierCurveEval(float u0, float u1, int order, float *ctlpoints, int stride, int dimension, float u, float retpoint[])
-{
-  float uprime = (u-u0)/(u1-u0);
-  float *ctlptr = ctlpoints;
-  float oneMinusX = 1.0f-uprime;
-  float XPower = 1.0f;
-
-  int i,k;
-  for(k=0; k<dimension; k++)
-    retpoint[k] = (*(ctlptr + k));
-
-  for(i=1; i<order; i++){
-    ctlptr += stride;
-    XPower *= uprime;
-    for(k=0; k<dimension; k++) {
-      retpoint[k] = retpoint[k]*oneMinusX + ctlptr[k]* binomialCoefficients[order-1][i] * XPower;
-    }
-  }
-}
-
-
-#if 0 // UNUSED
-/*order = degree +1 >=1.
- */
-void bezierCurveEvalfast(float u0, float u1, int order, float *ctlpoints, int stride,  int dimension, float u, float retpoint[])
-{
-  float uprime = (u-u0)/(u1-u0);
-  float buf[MAX_ORDER][MAX_ORDER][MAX_DIMENSION];
-  float* ctlptr = ctlpoints;
-  int r, i,j;
-  for(i=0; i<order; i++) {
-    for(j=0; j<dimension; j++)
-      buf[0][i][j] = ctlptr[j];
-    ctlptr += stride;
-  }
-  for(r=1; r<order; r++){
-    for(i=0; i<order-r; i++) {
-      for(j=0; j<dimension; j++)
-	buf[r][i][j] = (1-uprime)*buf[r-1][i][j] + uprime*buf[r-1][i+1][j];
-    }
-  }
-
-  for(j=0; j<dimension; j++)
-    retpoint[j] = buf[order-1][0][j];
-}
-#endif
-
-
-/*order = degree +1 >=1.
- */
-void bezierCurveEvalDer(float u0, float u1, int order, float *ctlpoints, int stride,  int dimension, float u, float retDer[])
-{
-  int i,k;
-  float width = u1-u0;
-  float *ctlptr = ctlpoints;
-
-  float buf[MAX_ORDER][MAX_DIMENSION];
-  if(order == 1){
-    for(k=0; k<dimension; k++)
-      retDer[k]=0;
-  }
-  for(i=0; i<order-1; i++){
-    for(k=0; k<dimension; k++) {
-      buf[i][k] = (ctlptr[stride+k] - ctlptr[k])*(order-1)/width;
-    }
-    ctlptr += stride;
-  }
-
-  bezierCurveEval(u0, u1, order-1, (float*) buf, MAX_DIMENSION,  dimension, u, retDer);
-}
-
-void bezierCurveEvalDerGen(int der, float u0, float u1, int order, float *ctlpoints, int stride,  int dimension, float u, float retDer[])
-{
-  int i,k,r;
-  float *ctlptr = ctlpoints;
-  float width=u1-u0;
-  float buf[MAX_ORDER][MAX_ORDER][MAX_DIMENSION];
-  if(der<0) der=0;
-  for(i=0; i<order; i++){
-    for(k=0; k<dimension; k++){
-      buf[0][i][k] = ctlptr[k];
-    }
-    ctlptr += stride;
-  }
-
-
-  for(r=1; r<=der; r++){
-    for(i=0; i<order-r; i++){
-      for(k=0; k<dimension; k++){
-	buf[r][i][k] = (buf[r-1][i+1][k] - buf[r-1][i][k])*(order-r)/width;
-      }
-    }
-  }
-
-  bezierCurveEval(u0, u1, order-der, (float *) (buf[der]), MAX_DIMENSION, dimension, u, retDer);
-}
-
-/*the Bezier bivarite polynomial is:
- * sum[i:0,uorder-1][j:0,vorder-1] { ctlpoints[i*ustride+j*vstride] * B(i)*B(j)
- * where B(i) and B(j) are basis functions
- */
-void bezierSurfEvalDerGen(int uder, int vder, float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float ret[])
-{
-  int i;
-  float newPoints[MAX_ORDER][MAX_DIMENSION];
-
-  for(i=0; i<uorder; i++){
-
-    bezierCurveEvalDerGen(vder, v0, v1, vorder, ctlpoints+ustride*i, vstride, dimension, v, newPoints[i]);
-
-  }
-
-  bezierCurveEvalDerGen(uder, u0, u1, uorder, (float *) newPoints, MAX_DIMENSION, dimension, u, ret);
-}
-
-
-/*division by w is performed*/
-void bezierSurfEval(float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float ret[])
-{
-  bezierSurfEvalDerGen(0, 0, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, ret);
-  if(dimension == 4) /*homogeneous*/{
-    ret[0] /= ret[3];
-    ret[1] /= ret[3];
-    ret[2] /= ret[3];
-  }
-}
-
-void bezierSurfEvalNormal(float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float retNormal[])
-{
-  float partialU[4];
-  float partialV[4];
-  assert(dimension>=3 && dimension <=4);
-  bezierSurfEvalDerGen(1,0, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, partialU);
-  bezierSurfEvalDerGen(0,1, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, partialV);
-
-  if(dimension == 3){/*inhomogeneous*/
-    crossProduct(partialU, partialV, retNormal);
-
-    normalize(retNormal);
-
-    return;
-  }
-  else { /*homogeneous*/
-    float val[4]; /*the point coordinates (without derivative)*/
-    float newPartialU[MAX_DIMENSION];
-    float newPartialV[MAX_DIMENSION];
-    int i;
-    bezierSurfEvalDerGen(0,0, u0, u1, uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u, v, val);
-
-    for(i=0; i<=2; i++){
-      newPartialU[i] = partialU[i] * val[3] - val[i] * partialU[3];
-      newPartialV[i] = partialV[i] * val[3] - val[i] * partialV[3];
-    }
-    crossProduct(newPartialU, newPartialV, retNormal);
-    normalize(retNormal);
-  }
-}
-
-/*if size is 0, then nothing is done*/
-static void normalize(float vec[3])
-{
-  float size = (float)sqrt(vec[0]*vec[0] + vec[1]*vec[1] + vec[2]*vec[2]);
-
-  if(size < TOLERANCE)
-    {
-#ifdef DEBUG
-      fprintf(stderr, "Warning: in oglBSpline.c normal is 0\n");
-#endif
-      return;
-    }
-  else {
-    vec[0] = vec[0]/size;
-    vec[1] = vec[1]/size;
-    vec[2] = vec[2]/size;
-  }
-}
-
-
-static void crossProduct(float x[3], float y[3], float ret[3])
-{
-  ret[0] = x[1]*y[2] - y[1]*x[2];
-  ret[1] = x[2]*y[0] - y[2]*x[0];
-  ret[2] = x[0]*y[1] - y[0]*x[1];
-
-}
-
diff --git a/src/glu/sgi/libnurbs/interface/bezierEval.h b/src/glu/sgi/libnurbs/interface/bezierEval.h
deleted file mode 100644
index 93e8c69d12e..00000000000
--- a/src/glu/sgi/libnurbs/interface/bezierEval.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _BEZIEREVAL_H
-#define _BEZIEREVAL_H
-
-void bezierCurveEval(float u0, float u1, int order, float *ctlpoints, int stride,  int dimension, float u, float retpoint[]);
-void bezierCurveEvalDer(float u0, float u1, int order, float *ctlpoints, int stride,  int dimension, float u, float retDer[]);
-void bezierCurveEvalDerGen(int der, float u0, float u1, int order, float *ctlpoints, int stride,  int dimension, float u, float retDer[]);
-
-
-void bezierSurfEvalDerGen(int uder, int vder, float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float ret[]);
-
-void bezierSurfEval(float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float ret[]);
-
-void bezierSurfEvalNormal(float u0, float u1, int uorder, float v0, float v1, int vorder, int dimension, float *ctlpoints, int ustride, int vstride, float u, float v, float retNormal[]);
-
-
-#endif
diff --git a/src/glu/sgi/libnurbs/interface/bezierPatch.cc b/src/glu/sgi/libnurbs/interface/bezierPatch.cc
deleted file mode 100644
index dbab3a1a2b7..00000000000
--- a/src/glu/sgi/libnurbs/interface/bezierPatch.cc
+++ /dev/null
@@ -1,206 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <assert.h>
-#include <GL/glu.h> /*for drawing bzier patch*/
-#include "bezierPatch.h"
-#include "bezierEval.h"
-
-/*
- *allocate an instance of bezierPatch. The control points are unknown. But
- *the space of this array is allocated with size of 
- *   uorder*vorder*dimension
- *
- */
-bezierPatch* bezierPatchMake(float umin, float vmin, float umax, float vmax, int uorder, int vorder, int dimension)
-{
-  bezierPatch* ret = (bezierPatch*) malloc(sizeof(bezierPatch));
-  assert(ret);
-  ret->umin = umin;
-  ret->vmin = vmin;
-  ret->umax = umax;
-  ret->vmax = vmax;
-  ret->uorder = uorder;
-  ret->vorder = vorder;
-  ret->dimension = dimension;
-  ret->ctlpoints = (float*) malloc(sizeof(float) * dimension * uorder * vorder);
-  assert(ret->ctlpoints);
-
-  ret->next = NULL;
-
-  return ret;
-}
-
-bezierPatch* bezierPatchMake2(float umin, float vmin, float umax, float vmax, int uorder, int vorder, int dimension, int ustride, int vstride,  float* ctlpoints)
-{
-  bezierPatch* ret = (bezierPatch*) malloc(sizeof(bezierPatch));
-  assert(ret);
-  ret->umin = umin;
-  ret->vmin = vmin;
-  ret->umax = umax;
-  ret->vmax = vmax;
-  ret->uorder = uorder;
-  ret->vorder = vorder;
-  ret->dimension = dimension;
-  ret->ctlpoints = (float*) malloc(sizeof(float) * dimension * uorder * vorder);
-  assert(ret->ctlpoints);
-
-  /*copy the control points there*/
-  int the_ustride = vorder * dimension;
-  int the_vstride = dimension;
-  for(int i=0; i<uorder; i++)
-    for(int j=0; j<vorder; j++)
-      for(int k=0; k<dimension; k++)
-	ret->ctlpoints[i * the_ustride + j*the_vstride+k] = ctlpoints[i*ustride+j*vstride+k];
-  
-  ret->next = NULL;
-
-  return ret;
-}
-
-/*
- *deallocate the space as allocated by Make
- */
-void bezierPatchDelete(bezierPatch *b)
-{
-  free(b->ctlpoints);
-  free(b);
-}
-
-/*delete the whole linked list
- */
-void bezierPatchDeleteList(bezierPatch *b)
-{
-  bezierPatch *temp;
-  while (b != NULL) {
-    temp = b;
-    b = b->next;
-    bezierPatchDelete(temp);    
-  }
-}
-
-bezierPatch* bezierPatchInsert(bezierPatch *list, bezierPatch *b)
-{
-  b->next = list;
-  return b;
-}
-
-/*print the data stored in this patch*/
-void bezierPatchPrint(bezierPatch *b)
-{
-  printf("bezierPatch:\n");
-  printf("umin,umax=(%f,%f), (vmin, vmax)=(%f,%f)\n", b->umin, b->umax, b->vmin, b->vmax);
-  printf("uorder=%i, vorder=%i\n", b->uorder, b->vorder);
-  printf("idmension = %i\n", b->dimension);
-}
-       
-/*print the whole list*/
-void bezierPatchPrintList(bezierPatch *list)
-{
-  bezierPatch* temp;
-  for(temp=list; temp != NULL; temp = temp->next)
-    bezierPatchPrint(temp);
-}
-
-void bezierPatchEval(bezierPatch *b, float u, float v, float ret[])
-{
-  if(   u >= b->umin && u<= b->umax
-     && v >= b->vmin && v<= b->vmax)
-    {
-
-      bezierSurfEval(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);
-
-     }
-  else if(b->next != NULL)
-    bezierPatchEval(b->next, u,v, ret);
-  else 
-    bezierSurfEval(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);    
-}
-
-/*the returned normal is normlized
- */
-void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float ret[])
-{
-  bezierSurfEvalNormal(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);  
-
-  if(   u >= b->umin && u<= b->umax
-     && v >= b->vmin && v<= b->vmax)
-    {
-      bezierSurfEvalNormal(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);
-     }
-  else if(b->next != NULL)
-    bezierPatchEvalNormal(b->next, u,v, ret);
-  else 
-    bezierSurfEvalNormal(b->umin, b->umax, b->uorder, b->vmin, b->vmax, b->vorder, b->dimension, b->ctlpoints, b->dimension * b->vorder, b->dimension, u, v, ret);    
-
-}
-
-void bezierPatchDraw(bezierPatch *bpatch, int u_reso, int v_reso)
-{
-  if(bpatch->dimension == 3)
-    glMap2f(GL_MAP2_VERTEX_3, bpatch->umin, bpatch->umax, 3*bpatch->vorder, bpatch->uorder, bpatch->vmin, bpatch->vmax,3, bpatch->vorder, (GLfloat*) bpatch->ctlpoints);
-  else
-    glMap2f(GL_MAP2_VERTEX_4, bpatch->umin, bpatch->umax, 4*bpatch->vorder, bpatch->uorder, bpatch->vmin, bpatch->vmax,3, bpatch->vorder, (GLfloat*) bpatch->ctlpoints);    
-
-  glMapGrid2f(u_reso, bpatch->umin, bpatch->umax, 
-	      v_reso, bpatch->vmin, bpatch->vmax);
-  glEvalMesh2(GL_LINE, 0, u_reso, 0, v_reso);
-}
-
-void bezierPatchListDraw(bezierPatch *list, int u_reso, int v_reso)
-{
-  bezierPatch *temp;
-glEnable(GL_LIGHTING);
-glEnable(GL_LIGHT0);
-glEnable(GL_MAP2_VERTEX_3);
-glEnable(GL_AUTO_NORMAL);
-glEnable(GL_NORMALIZE);
-glColor3f(1,0,0);
-#ifdef DEBUG
-printf("mapmap\n");
-#endif
-
-
-  for(temp = list; temp != NULL; temp = temp->next)
-    bezierPatchDraw(temp, u_reso, v_reso);
-}
-	    
-
-
diff --git a/src/glu/sgi/libnurbs/interface/bezierPatch.h b/src/glu/sgi/libnurbs/interface/bezierPatch.h
deleted file mode 100644
index 981183afaea..00000000000
--- a/src/glu/sgi/libnurbs/interface/bezierPatch.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _BEZIERPATCH_H
-#define _BEZIERPATCH_H
-
-typedef struct bezierPatch{
-  float umin, vmin, umax, vmax;
-  int uorder; /*order= degree + 1*/
-  int vorder; 
-
-  /*
-   *the control points are stored in a one dimensional  array.
-   *the surface is defined as:
-   *      s(u,v) = sum_{i,j} P(i,j) * B_i(u) * B_j(v).
-   *where P(i,j) are the control points, B_i(.) are Bezier
-   *basis functions.
-   *Each control point can have dimension 3 or 4: (x,y,z,w).
-   *The components of P(i,j) are stored in a one dimensional 
-   *array: 
-   *       ctlpoints[]
-   *in the order of:
-   * P[0,0], P[0,1], ..., P[0,vorder-1],
-   * P[1,0], P[1,1], ..., P[1,vorder-1],
-   *  ...             
-   * P[uorder-1,0], P[uorder-1,1], ..., P[uorder-1,vorder-1].
-   */
-  int dimension;
-  float* ctlpoints;
-
-  /*
-   *in case we have to manage multiple bezierPatches.
-   */
-  struct bezierPatch  *next; 
-
-} bezierPatch;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-bezierPatch* bezierPatchMake(float umin, float vmin, float umax, float vmax, int urder, int vorder, int dimension);
-
-bezierPatch* bezierPatchMake2(float umin, float vmin, float umax, float vmax, int urder, int vorder, int dimension, int ustride, int vstride, float *ctlpoints);
-
-
-bezierPatch* bezierPatchInsert(bezierPatch *list, bezierPatch *b);
-
-void bezierPatchDelete(bezierPatch *b);
-
-void bezierPatchDeleteList(bezierPatch *b);
-
-void bezierPatchPrint(bezierPatch *b);
-
-void bezierPatchPrintList(bezierPatch *list);
-
-void bezierPatchEval(bezierPatch *b, float u, float v, float ret[]);
-
-void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float retNormal[]);
-
-void bezierPatchEval(bezierPatch *b, float u, float v, float ret[]);
-
-void bezierPatchEvalNormal(bezierPatch *b, float u, float v, float ret[]);
-
-
-void bezierPatchDraw(bezierPatch *bpatch, int u_reso, int v_reso);
-
-void bezierPatchListDraw(bezierPatch *list, int u_reso, int v_reso);
-
-#ifdef __cplusplus
-}
-#endif
-
-
-#endif
diff --git a/src/glu/sgi/libnurbs/interface/bezierPatchMesh.cc b/src/glu/sgi/libnurbs/interface/bezierPatchMesh.cc
deleted file mode 100644
index ac7ff84fc4a..00000000000
--- a/src/glu/sgi/libnurbs/interface/bezierPatchMesh.cc
+++ /dev/null
@@ -1,610 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <assert.h>
-#include <GL/gl.h>
-#include "bezierEval.h"
-#include "bezierPatchMesh.h"
-
-static int isDegenerate(float A[2], float B[2], float C[2]);
-
-void drawStrips(float *vertex_array, float *normal_array, int *length_array, GLenum *type_array, int num_strips)
-{
-  int i,j,k;
-  k=0;
-  /*k is the index of the first component of the current vertex*/
-  for(i=0; i<num_strips; i++)
-    {
-      glBegin(type_array[i]);
-      for(j=0; j<length_array[i]; j++)
-	{
-	  glNormal3fv(normal_array+k);
-	  glVertex3fv(vertex_array+k);
-	  k += 3;
-	}
-      glEnd();
-    }
-}
-
-void bezierPatchMeshListDelDeg(bezierPatchMesh* list)
-{
-  bezierPatchMesh* temp;
-  for(temp=list; temp != NULL; temp = temp->next)
-    {
-      bezierPatchMeshDelDeg(temp);
-    }
-}
-
-void bezierPatchMeshListDelete(bezierPatchMesh *list)
-{
-  if(list == NULL) return;
-  bezierPatchMeshListDelete(list->next);
-  bezierPatchMeshDelete(list);  
-}
-
-
-
-
-bezierPatchMesh* bezierPatchMeshListReverse(bezierPatchMesh* list)
-{
- bezierPatchMesh* ret=NULL;
- bezierPatchMesh* temp;
- bezierPatchMesh* nextone;
-  for(temp = list; temp != NULL; temp = nextone)
-    {
-      nextone = temp->next;
-      ret=bezierPatchMeshListInsert(ret, temp);
-    }
- return ret;
-}
-
-/*maptype is either GL_MAP2_VERTEX_3 or GL_MAP2_VERTEX_4
- */
-bezierPatchMesh *bezierPatchMeshMake(int maptype, float umin, float umax, int ustride, int uorder, float vmin, float vmax, int vstride, int vorder, float *ctlpoints,  int size_UVarray, int size_length_array)
-{
-  int i,j,k;
-  int dimension;
-  int the_ustride;
-  int the_vstride;
-
-  if(maptype == GL_MAP2_VERTEX_3) dimension = 3;
-  else if (maptype==GL_MAP2_VERTEX_4) dimension = 4;
-  else {
-    fprintf(stderr, "error in inMap2f, maptype=%i is wrong, maptype,map is invalid\n", maptype);
-    return NULL;
-  }
-
-  bezierPatchMesh *ret = (bezierPatchMesh*) malloc(sizeof(bezierPatchMesh));
-  assert(ret);
-
-  ret->bpatch_normal = NULL;
-  ret->bpatch_color  = NULL;
-  ret->bpatch_texcoord = NULL;
-  ret->bpatch = bezierPatchMake(umin, vmin, umax, vmax, uorder, vorder, dimension);
-
-  /*copy the control points there*/
-  the_ustride = vorder * dimension;
-  the_vstride = dimension;
-  for(i=0; i<uorder; i++)
-    for(j=0; j<vorder; j++)
-      for(k=0; k<dimension; k++)
-	ret->bpatch->ctlpoints[i * the_ustride + j*the_vstride+k] = ctlpoints[i*ustride+j*vstride+k];
-  
-
-  ret->size_UVarray = size_UVarray;
-  ret->size_length_array = size_length_array;
-  ret->UVarray = (float*) malloc(sizeof(float) * size_UVarray);
-  assert(ret->UVarray);
-  ret->length_array = (int *)malloc(sizeof(int) * size_length_array);
-  assert(ret->length_array);
-  ret->type_array = (GLenum *)malloc(sizeof(GLenum) * size_length_array);
-  assert(ret->type_array);
-
-  ret->index_UVarray = 0;
-  ret->index_length_array = 0;
-
-  ret->vertex_array = NULL;
-  ret->normal_array = NULL;
-  ret->color_array  = NULL;
-  ret->texcoord_array = NULL;
-
-  ret->next = NULL;
-  return ret;
-}
-
-bezierPatchMesh *bezierPatchMeshMake2(int size_UVarray, int size_length_array)
-{
-  bezierPatchMesh *ret = (bezierPatchMesh*) malloc(sizeof(bezierPatchMesh));
-  assert(ret);
-
-  ret->bpatch = NULL;
-  ret->bpatch_normal = NULL;
-  ret->bpatch_color  = NULL;
-  ret->bpatch_texcoord = NULL;
-
-  ret->size_UVarray = size_UVarray;
-  ret->size_length_array = size_length_array;
-  ret->UVarray = (float*) malloc(sizeof(float) * size_UVarray);
-  assert(ret->UVarray);
-  ret->length_array = (int *)malloc(sizeof(int) * size_length_array);
-  assert(ret->length_array);
-  ret->type_array = (GLenum *)malloc(sizeof(GLenum) * size_length_array);
-  assert(ret->type_array);
-
-  ret->index_UVarray = 0;
-  ret->index_length_array = 0;
-
-  ret->vertex_array = NULL;
-  ret->normal_array = NULL;
-  ret->color_array  = NULL;
-  ret->texcoord_array = NULL;
-
-  ret->next = NULL;
-  return ret;
-}
-
-void bezierPatchMeshPutPatch(bezierPatchMesh *bpm, int maptype, float umin, float umax, int ustride, int uorder, float vmin, float vmax, int vstride, int vorder, float *ctlpoints)
-{
-  switch(maptype){
-  case GL_MAP2_VERTEX_3:
-    bpm->bpatch = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 3, ustride, vstride, ctlpoints);
-    break;
-  case GL_MAP2_VERTEX_4:
-    bpm->bpatch = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 4,ustride, vstride, ctlpoints );
-    break;
-  case GL_MAP2_NORMAL:
-    bpm->bpatch_normal = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 3, ustride, vstride, ctlpoints);
-    break;
-  case GL_MAP2_INDEX:
-    bpm->bpatch_color = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 1, ustride, vstride, ctlpoints);
-    break;
-  case GL_MAP2_COLOR_4:
-    bpm->bpatch_color = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 4, ustride, vstride, ctlpoints);
-    break;
-  case GL_MAP2_TEXTURE_COORD_1:
-    bpm->bpatch_texcoord = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 1, ustride, vstride, ctlpoints);
-    break;
-  case GL_MAP2_TEXTURE_COORD_2:
-    bpm->bpatch_texcoord = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 2, ustride, vstride, ctlpoints);
-    break;    
-  case GL_MAP2_TEXTURE_COORD_3:
-    bpm->bpatch_texcoord = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 3, ustride, vstride, ctlpoints);
-    break;    
-  case GL_MAP2_TEXTURE_COORD_4:
-    bpm->bpatch_texcoord = bezierPatchMake2(umin, vmin, umax, vmax, uorder, vorder, 4, ustride, vstride, ctlpoints);
-    break;    
-  default:
-    fprintf(stderr, "error in bezierPatchMeshPutPatch, maptype=%i is wrong, maptype,map is invalid\n", maptype);
-  }
-}
-  
-
-/*delete everything including the arrays. So if you want to output the
- *pointers of the arrays, you should not use this function to deallocate space.
- *you should dealocate manually
- */
-void bezierPatchMeshDelete(bezierPatchMesh *bpm)
-{
-  if(bpm->bpatch != NULL)
-    bezierPatchDelete(bpm->bpatch);
-  if(bpm->bpatch_normal != NULL)
-    bezierPatchDelete(bpm->bpatch_normal);
-  if(bpm->bpatch_color != NULL)
-    bezierPatchDelete(bpm->bpatch_color);
-  if(bpm->bpatch_texcoord != NULL)
-    bezierPatchDelete(bpm->bpatch_texcoord);
-  
-  free(bpm->UVarray);
-  free(bpm->length_array);
-  free(bpm->vertex_array);
-  free(bpm->normal_array);
-  free(bpm->type_array);
-  free(bpm);
-}
- 
-/*begin a strip
- *type is the primitive type:
- */
-void bezierPatchMeshBeginStrip(bezierPatchMesh *bpm, GLenum type)
-{
-  bpm->counter = 0;
-  bpm->type = type;
-}
-
-/*signal the end of the current strip*/
-void bezierPatchMeshEndStrip(bezierPatchMesh *bpm)
-{
-  int i;
-  
-  /*if there are no vertices in this strip, then nothing needs to be done*/
-  if(bpm->counter == 0) return;
-  
-  /*if the length_array is full, it should be expanded*/
-  if(bpm->index_length_array >= bpm->size_length_array)
-    {
-      int *temp = (int*) malloc(sizeof(int) * (bpm->size_length_array*2 + 1));
-      assert(temp);
-      GLenum *temp_type = (GLenum*) malloc(sizeof(GLenum) * (bpm->size_length_array*2 + 1));
-      assert(temp_type);
-      /*update the size*/
-      bpm->size_length_array = bpm->size_length_array*2 + 1;
-      
-      /*copy*/
-      for(i=0; i<bpm->index_length_array; i++)
-	{
-	  temp[i] = bpm->length_array[i];
-	  temp_type[i] = bpm->type_array[i];
-	}
-      
-      /*deallocate old array*/
-      free(bpm->length_array);
-      free(bpm->type_array);
-      
-      /*point to the new array which is twice as bigger*/
-      bpm->length_array = temp;
-      bpm->type_array = temp_type;
-    }
-  bpm->type_array[bpm->index_length_array] = bpm->type;
-  bpm->length_array[bpm->index_length_array++] = bpm->counter;
-
-}
-
-/*insert (u,v) */
-void bezierPatchMeshInsertUV(bezierPatchMesh *bpm, float u, float v)
-{
-  int i;
-  /*if the UVarray is full, it should be expanded*/
-  if(bpm->index_UVarray+1 >= bpm->size_UVarray)
-    {
-      float *temp = (float*) malloc(sizeof(float) * (bpm->size_UVarray * 2 + 2));
-      assert(temp);
-      
-      /*update the size*/
-      bpm->size_UVarray = bpm->size_UVarray*2 + 2;
-      
-      /*copy*/
-      for(i=0; i<bpm->index_UVarray; i++)
-	{
-	  temp[i] = bpm->UVarray[i];
-	}
-      
-      /*deallocate old array*/
-      free(bpm->UVarray);
-      
-      /*pointing to the new arrays*/
-      bpm->UVarray = temp;
-    }
-  /*insert the new UV*/
-  bpm->UVarray[bpm->index_UVarray] = u;
-  bpm->index_UVarray++;
-  bpm->UVarray[bpm->index_UVarray] = v;
-  bpm->index_UVarray++;
-
-  /*update counter: one more vertex*/
-  bpm->counter++;
-
-
-}
-
-void bezierPatchMeshPrint(bezierPatchMesh *bpm)
-{
-  int i;
-  printf("the bezier patch is\n");
-  bezierPatchPrint(bpm->bpatch);
-  printf("index_length_array= %i\n", bpm->index_length_array);
-  printf("size_length_array =%i\n", bpm->size_length_array);
-  printf("index_UVarray =%i\n", bpm->index_UVarray);
-  printf("size_UVarray =%i\n", bpm->size_UVarray);
-  printf("UVarray is\n");
-  for(i=0; i<bpm->index_UVarray; i++)
-    printf("%f ", bpm->UVarray[i]);
-
-  printf("length_array is\n");
-  for(i=0; i<bpm->index_length_array; i++)
-    printf("%i ", bpm->length_array[i]);
-  printf("\n");
-
-}
-
-/*insert a new patch in front of the current linked list and return the new list*/
-bezierPatchMesh* bezierPatchMeshListInsert(bezierPatchMesh* list, bezierPatchMesh* bpm)
-{
-  bpm->next=list;
-  return bpm;
-}
-
-/*print all the patches*/
-void bezierPatchMeshListPrint(bezierPatchMesh* list)
-{
-  bezierPatchMesh *temp;
-  for(temp = list; temp != NULL; temp = temp->next)
-    {
-      bezierPatchMeshPrint(temp);
-    }
-}
-
-int bezierPatchMeshListTotalStrips(bezierPatchMesh* list)
-{
-  int sum=0;
-  bezierPatchMesh *temp;
-  for(temp=list; temp != NULL; temp = temp->next)
-    {
-      sum += temp->index_length_array;
-    }
-  return sum;
-}
-
-int bezierPatchMeshListTotalVert(bezierPatchMesh* list)
-{
-  int sum=0;
-  bezierPatchMesh *temp;
-  for(temp=list; temp != NULL; temp = temp->next)
-    {
-      sum += temp->index_UVarray;
-    }
-  return sum/2;
-}
-
-int bezierPatchMeshListNumTriangles(bezierPatchMesh* list)
-{
-  int sum=0;
-  bezierPatchMesh* temp;
-  for(temp=list; temp != NULL; temp = temp->next)
-    {
-      sum +=  bezierPatchMeshNumTriangles(temp);
-    }
-  return sum;
-}
-
-int bezierPatchMeshNumTriangles(bezierPatchMesh* bpm)
-{
-  int i;
-  int sum=0;
-  for(i=0; i<bpm->index_length_array; i++)
-    {
-      switch(bpm->type_array[i])
-	{
-	case GL_TRIANGLES:
-	  sum += bpm->length_array[i]/3;
-	  break;
-	case GL_TRIANGLE_FAN:
-	  if(bpm->length_array[i] > 2)
-	    sum += bpm->length_array[i]-2;
-	  break;
-	case GL_TRIANGLE_STRIP:
-	  if(bpm->length_array[i] > 2)
-	    sum += bpm->length_array[i]-2;
-	  break;
-	case GL_QUAD_STRIP:
-	  if(bpm->length_array[i]>2)
-	    sum += (bpm->length_array[i]-2);
-	  break;
-	default:
-	  fprintf(stderr,"error in bezierPatchMeshListNumTriangles, type invalid\n");
-	}
-    }
-  return sum;
-}
-
-/*delete degenerate triangles*/
-void bezierPatchMeshDelDeg(bezierPatchMesh* bpm)
-{
-  if(bpm == NULL) return;
-  int i,j,k;
-  int *new_length_array;
-  GLenum *new_type_array;
-  int index_new_length_array;
-  float *new_UVarray;
-  int index_new_UVarray;
-
-  new_length_array = (int*)malloc(sizeof(int) * bpm->index_length_array);
-  assert(new_length_array);
-  new_type_array = (GLenum*)malloc(sizeof(GLenum) * bpm->index_length_array);
-  assert(new_length_array);
-  new_UVarray = (float*) malloc(sizeof(float) * bpm->index_UVarray);
-  assert(new_UVarray);
-
-  index_new_length_array = 0;
-  index_new_UVarray=0;
-  k=0;
-  for(i=0; i<bpm->index_length_array; i++){
-    
-    /*(if not degenerate, we have to copy*/
-    if( (bpm->length_array[i] != 3) || (!isDegenerate(bpm->UVarray+k, bpm->UVarray+k+2, bpm->UVarray+k+4)))
-	  {
-	    for(j=0; j<2* bpm->length_array[i]; j++)
-	      new_UVarray[index_new_UVarray++] = bpm->UVarray[k++];
-
-	    new_length_array[index_new_length_array] = bpm->length_array[i];
-	    new_type_array[index_new_length_array] = bpm->type_array[i];
-	    index_new_length_array++;
-	  }
-    else
-      {
-	k += 6;
-      }
-  }  
-  free(bpm->UVarray);
-  free(bpm->length_array);
-  free(bpm->type_array);
-  bpm->UVarray=new_UVarray;
-  bpm->length_array=new_length_array;
-  bpm->type_array=new_type_array;
-  bpm->index_UVarray = index_new_UVarray;
-  bpm->index_length_array = index_new_length_array;
-  
-}
-
-/*(u,v) to XYZ
- *the xyz and normals are stored in vertex_array, 
- *and normal_array. the spaces of both are allocated here
- */
-void bezierPatchMeshEval(bezierPatchMesh* bpm)
-{
-  int i,j,k,l;
-  float u,v;
-  float u0 = bpm->bpatch->umin;
-  float u1 = bpm->bpatch->umax;
-  int uorder = bpm->bpatch->uorder;
-  float v0 = bpm->bpatch->vmin;
-  float v1 = bpm->bpatch->vmax;
-  int vorder = bpm->bpatch->vorder;
-  int dimension = bpm->bpatch->dimension;
-  int ustride = dimension * vorder;
-  int vstride = dimension;
-  float *ctlpoints = bpm->bpatch->ctlpoints;
-  
-  bpm->vertex_array = (float*) malloc(sizeof(float)* (bpm->index_UVarray/2) * 3);
-  assert(bpm->vertex_array);
-  bpm->normal_array = (float*) malloc(sizeof(float)* (bpm->index_UVarray/2) * 3);
-  assert(bpm->normal_array);
-
-  k=0;
-  l=0;
-  for(i=0; i<bpm->index_length_array; i++)
-    {
-      for(j=0; j<bpm->length_array[i]; j++)
-	{
-	  u = bpm->UVarray[k];
-	  v = bpm->UVarray[k+1];
-	  bezierSurfEval(u0,u1,uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u,v, bpm->vertex_array+l);
-	  bezierSurfEvalNormal(u0,u1,uorder, v0, v1, vorder, dimension, ctlpoints, ustride, vstride, u,v, bpm->normal_array+l);
-	  k += 2;
-	  l += 3;
-	}
-    }
-}
-    
-void bezierPatchMeshListEval(bezierPatchMesh* list)
-{
-  bezierPatchMesh* temp;
-  for(temp = list; temp != NULL; temp = temp->next)
-    {
-      bezierPatchMeshEval(temp);
-    }
-}
-
-void bezierPatchMeshDraw(bezierPatchMesh* bpm)
-{
-  int i,j,k;
-  k=0;
-  /*k is the index of the first component of the current vertex*/
-  for(i=0; i<bpm->index_length_array; i++)
-    {
-      glBegin(bpm->type_array[i]);
-      for(j=0; j<bpm->length_array[i]; j++)
-	{
-	  glNormal3fv(bpm->normal_array+k);
-	  glVertex3fv(bpm->vertex_array+k);
-	  k+= 3;
-	}
-      glEnd();
-    }
-}
-
-void bezierPatchMeshListDraw(bezierPatchMesh* list)
-{
-  bezierPatchMesh* temp;
-  for(temp = list; temp != NULL; temp = temp->next)
-    {
-      bezierPatchMeshDraw(temp);
-    }
-}
-
-void bezierPatchMeshListCollect(bezierPatchMesh* list, float **vertex_array, float **normal_array, int **length_array, GLenum **type_array, int *num_strips)
-{
-  int i,j,k,l;
-  bezierPatchMesh *temp;
-  int total_num_vertices = bezierPatchMeshListTotalVert(list);
-  (*vertex_array) = (float *) malloc(sizeof(float) * total_num_vertices*3);
-  assert(*vertex_array);
-  (*normal_array) = (float *) malloc(sizeof(float) * total_num_vertices*3);
-  assert(*normal_array);
-
-  *num_strips = bezierPatchMeshListTotalStrips(list);
-   
-  *length_array = (int*) malloc(sizeof(int) * (*num_strips));
-  assert(*length_array);
-
-  *type_array = (GLenum*) malloc(sizeof(GLenum) * (*num_strips));
-  assert(*type_array);
-  
-  k=0;
-  l=0;
-  for(temp = list; temp != NULL; temp = temp->next)
-    {
-      int x=0;
-      for(i=0; i<temp->index_length_array; i++)
-	{
-	  for(j=0; j<temp->length_array[i]; j++)
-	    {
-	      (*vertex_array)[k] = temp->vertex_array[x];
-	      (*vertex_array)[k+1] = temp->vertex_array[x+1];
-	      (*vertex_array)[k+2] = temp->vertex_array[x+2];
-
-	      (*normal_array)[k] = temp->normal_array[x];
-	      (*normal_array)[k+1] = temp->normal_array[x+1];
-	      (*normal_array)[k+2] = temp->normal_array[x+2];
-
-	      x += 3;
-	      k += 3;
-	    }
-	  (*type_array)[l]  = temp->type_array[i];
-	  (*length_array)[l++] = temp->length_array[i];
-	}
-    }
-}
-
-
-
-static int isDegenerate(float A[2], float B[2], float C[2])
-{
-  if( (A[0] == B[0] && A[1]==B[1]) ||
-      (A[0] == C[0] && A[1]==C[1]) ||
-      (B[0] == C[0] && B[1]==C[1])
-     )
-    return 1;
-  else
-    return 0;
-}
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/interface/bezierPatchMesh.h b/src/glu/sgi/libnurbs/interface/bezierPatchMesh.h
deleted file mode 100644
index ba6868a3063..00000000000
--- a/src/glu/sgi/libnurbs/interface/bezierPatchMesh.h
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _BEZIERPATCHMESH_H
-#define _BEZIERPATCHMESH_H
-
-#include <GL/gl.h>
-#include "bezierPatch.h"
-
-typedef struct bezierPatchMesh{
-  bezierPatch *bpatch; /*vertex*/
-  bezierPatch *bpatch_normal; 
-  bezierPatch *bpatch_texcoord; /*s,t,r,q*/
-  bezierPatch *bpatch_color; /*RGBA*/
-
-  float *UVarray; /*all UV components of all vertices of all strips*/
-  int   *length_array; /*[i] is the number of vertices in the ith strip*/
-  GLenum *type_array;  /*[i] is the type of the ith primitive*/
-
-  /*to support dynamic insertion*/
-  int size_UVarray;
-  int index_UVarray;
-  int size_length_array;
-  int index_length_array;
-  
-  int counter; /*track the current strip size*/
-  GLenum type; /*track the current type: 0: GL_TRIANGLES, 1: GL_TRIANGLE_STRIP*/
-  
-  /*we eventually want to evaluate from (u,v) to (x,y,z) and draw them*/
-  float *vertex_array; /*each vertex contains three components*/
-  float *normal_array; /*each normal contains three components*/
-  float *color_array;
-  float *texcoord_array;
-
-  /*in case we need a linked list*/
-  struct bezierPatchMesh *next;
-} bezierPatchMesh;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-
-bezierPatchMesh *bezierPatchMeshMake(int maptype, float umin, float umax, int ustride, int uorder, float vmin, float vmax, int vstride, int vorder, float *ctlpoints,  int size_UVarray, int size_length_array);
-
-/*initilize patches to be null*/
-bezierPatchMesh *bezierPatchMeshMake2(int size_UVarray, int size_length_array);
-
-void bezierPatchMeshPutPatch(bezierPatchMesh *bpm, int maptype, float umin, float umax, int ustride, int uorder, float vmin, float vmax, int vstride, int vorder, float *ctlpoints);
-
-void bezierPatchMeshDelete(bezierPatchMesh *bpm);
-
-void bezierPatchMeshBeginStrip(bezierPatchMesh *bpm, GLenum type);
-
-void bezierPatchMeshEndStrip(bezierPatchMesh *bpm);
-
-void bezierPatchMeshInsertUV(bezierPatchMesh *bpm, float u, float v);
-
-void bezierPatchMeshPrint(bezierPatchMesh *bpm);
-
-bezierPatchMesh* bezierPatchMeshListInsert(bezierPatchMesh* list, bezierPatchMesh* bpm);
-
-void bezierPatchMeshListPrint(bezierPatchMesh* list);
-
-int bezierPatchMeshListTotalStrips(bezierPatchMesh* list);
-
-int bezierPatchMeshListTotalVert(bezierPatchMesh* list);
-int bezierPatchMeshNumTriangles(bezierPatchMesh* bpm);
-int bezierPatchMeshListNumTriangles(bezierPatchMesh* list);
-
-void bezierPatchMeshDelDeg(bezierPatchMesh* bpm);
-
-
-void bezierPatchMeshEval(bezierPatchMesh* bpm);
-  
-void bezierPatchMeshDraw(bezierPatchMesh* bpm);
-
-void bezierPatchMeshListDraw(bezierPatchMesh* list);
-void bezierPatchMeshListEval(bezierPatchMesh* list);
-void bezierPatchMeshListCollect(bezierPatchMesh* list, float **vertex_array, float **normal_array, int **length_array, GLenum **type_array, int *num_strips);
-
-void bezierPatchMeshListDelDeg(bezierPatchMesh* list);
-void bezierPatchMeshListDelete(bezierPatchMesh *list);
-bezierPatchMesh* bezierPatchMeshListReverse(bezierPatchMesh* list);
-void drawStrips(float *vertex_array, float *normal_array, int *length_array, GLenum *type_array, int num_strips);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/src/glu/sgi/libnurbs/interface/glcurveval.cc b/src/glu/sgi/libnurbs/interface/glcurveval.cc
deleted file mode 100644
index b6591dba0d4..00000000000
--- a/src/glu/sgi/libnurbs/interface/glcurveval.cc
+++ /dev/null
@@ -1,402 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * glcurveval.c++
- *
- */
-
-/* Polynomial Evaluator Interface */
-
-#include "gluos.h"
-#include "glimports.h"
-#include "glrenderer.h"
-#include "glcurveval.h"
-#include "nurbsconsts.h"
- 
-OpenGLCurveEvaluator::OpenGLCurveEvaluator(void) 
-{
-  //no default callback functions
-  beginCallBackN = NULL;
-  endCallBackN = NULL;
-  vertexCallBackN = NULL;
-  normalCallBackN = NULL;
-  colorCallBackN = NULL;
-  texcoordCallBackN = NULL;
-  beginCallBackData = NULL;
-  endCallBackData = NULL;
-  vertexCallBackData = NULL;
-  normalCallBackData = NULL;
-  colorCallBackData = NULL;
-  texcoordCallBackData = NULL;
-
-  userData = NULL;
-  
-  vertex_flag = 0;
-  normal_flag = 0;
-  color_flag = 0;
-  texcoord_flag = 0;
-
-  em_vertex.uprime = -1.0;
-  em_normal.uprime = -1.0;
-  em_color.uprime = -1.0;
-  em_texcoord.uprime = -1.0;
-  output_triangles = 0; // don't output triangles by default
-}
-
-OpenGLCurveEvaluator::~OpenGLCurveEvaluator(void) 
-{ 
-}
-
-/* added nonsense to avoid the warning messages at compile time */
-void
-OpenGLCurveEvaluator::addMap(CurveMap *m)
-{
-	m = m;
-}
-
-void
-OpenGLCurveEvaluator::range1f(long type, REAL *from, REAL *to)
-{
-	type = type;
-	from = from;
-	to = to;
-}
-
-void
-OpenGLCurveEvaluator::domain1f(REAL ulo, REAL uhi)
-{
-	ulo = ulo;
-	uhi = uhi;
-}
-
-void
-OpenGLCurveEvaluator::bgnline(void)
-{
-  if(output_triangles)
-    beginCallBack(GL_LINE_STRIP, userData);
-  else
-    glBegin((GLenum) GL_LINE_STRIP);
-}
-
-void
-OpenGLCurveEvaluator::endline(void)
-{
-  if(output_triangles)
-    endCallBack(userData);
-  else
-    glEnd();
-}
-
-/*---------------------------------------------------------------------------
- * disable - turn off a curve map
- *---------------------------------------------------------------------------
- */
-void
-OpenGLCurveEvaluator::disable(long type)
-{
-    glDisable((GLenum) type);
-}
-
-/*---------------------------------------------------------------------------
- * enable - turn on a curve map
- *---------------------------------------------------------------------------
- */
-void
-OpenGLCurveEvaluator::enable(long type)
-{
-    glEnable((GLenum) type);
-}
-
-/*-------------------------------------------------------------------------
- * mapgrid1f - define a lattice of points with origin and offset
- *-------------------------------------------------------------------------
- */
-void 
-OpenGLCurveEvaluator::mapgrid1f(long nu, REAL u0, REAL u1)
-{
-  if(output_triangles)
-    {
-      global_grid_u0 = u0;
-      global_grid_u1 = u1;
-      global_grid_nu = (int) nu;
-    }
-  else
-    glMapGrid1f((GLint) nu, (GLfloat) u0, (GLfloat) u1);
-}
-
-/*-------------------------------------------------------------------------
- * bgnmap1 - preamble to curve definition and evaluations
- *-------------------------------------------------------------------------
- */
-void
-OpenGLCurveEvaluator::bgnmap1f(long)
-{
-  if(output_triangles)
-    {
-      //initialized so that no maps are set initially
-      vertex_flag = 0;
-      normal_flag = 0;
-      color_flag = 0;
-      texcoord_flag = 0;
-      //no need to worry about gl states when doing callback
-    }
-  else
-    glPushAttrib((GLbitfield) GL_EVAL_BIT);
-}
-
-/*-------------------------------------------------------------------------
- * endmap1 - postamble to a curve map
- *-------------------------------------------------------------------------
- */
-void
-OpenGLCurveEvaluator::endmap1f(void)
-{
-  if(output_triangles)
-    {
-      
-    }
-  else
-    glPopAttrib();
-}
-
-/*-------------------------------------------------------------------------
- * map1f - pass a desription of a curve map
- *-------------------------------------------------------------------------
- */
-void
-OpenGLCurveEvaluator::map1f(
-    long type,		 	/* map type */
-    REAL ulo,			/* lower parametric bound */
-    REAL uhi,			/* upper parametric bound */
-    long stride, 		/* distance to next point in REALS */
-    long order,			/* parametric order */
-    REAL *pts 			/* control points */
-)
-{
-  if(output_triangles)
-    {
-      int dimension = 0;
-      int which = 0;
-      switch(type){
-      case GL_MAP1_VERTEX_3:
-	which = 0;
-	dimension = 3;
-	break;
-      case GL_MAP1_VERTEX_4:
-	which=0;
-	dimension = 4;
-	break;
-      case GL_MAP1_INDEX:
-	which=2;
-	dimension = 1;
-	break;
-      case GL_MAP1_COLOR_4:
-	which=2;
-	dimension = 4;
-	break;
-      case GL_MAP1_NORMAL:
-	which=1;
-	dimension = 3;
-	break;
-      case GL_MAP1_TEXTURE_COORD_1:
-	which=3;
-	dimension = 1;
-	break;
-      case GL_MAP1_TEXTURE_COORD_2:
-	which=3;
-	dimension = 2;
-	break;
-	
-      case GL_MAP1_TEXTURE_COORD_3:
-	which=3;
-	dimension = 3;
-	break;
-      case GL_MAP1_TEXTURE_COORD_4:
-	which=3;
-	dimension = 4;
-	break;	
-      }
-      inMap1f(which, dimension, ulo, uhi, stride, order, pts); 	      
-    }       
-  else
-    glMap1f((GLenum) type, (GLfloat) ulo, (GLfloat) uhi, (GLint) stride, 
-	    (GLint) order, (const GLfloat *) pts);
-}
-
-/*-------------------------------------------------------------------------
- * mapmesh1f - evaluate a mesh of points on lattice
- *-------------------------------------------------------------------------
- */
-void OpenGLCurveEvaluator::mapmesh1f(long style, long from, long to)
-{
-  if(output_triangles)
-    {
-      inMapMesh1f((int) from, (int) to);      
-    }
-  else
-    {
-      switch(style) {
-      default:
-      case N_MESHFILL:
-      case N_MESHLINE:
-	glEvalMesh1((GLenum) GL_LINE, (GLint) from, (GLint) to);
-	break;
-      case N_MESHPOINT:
-	glEvalMesh1((GLenum) GL_POINT, (GLint) from, (GLint) to);
-	break;
-      }
-    }
-}
-
-/*-------------------------------------------------------------------------
- * evalpoint1i - evaluate a point on a curve
- *-------------------------------------------------------------------------
- */
-void OpenGLCurveEvaluator::evalpoint1i(long i)
-{
-    glEvalPoint1((GLint) i);
-}
-
-/*-------------------------------------------------------------------------
- * evalcoord1f - evaluate a point on a curve
- *-------------------------------------------------------------------------
- */
-void OpenGLCurveEvaluator::evalcoord1f(long, REAL u)
-{
-    glEvalCoord1f((GLfloat) u);
-}
-
-void
-#ifdef _WIN32
-OpenGLCurveEvaluator::putCallBack(GLenum which, void (GLAPIENTRY *fn)())
-#else
-OpenGLCurveEvaluator::putCallBack(GLenum which, _GLUfuncptr fn)
-#endif
-{
-  switch(which)
-  {
-    case GLU_NURBS_BEGIN:
-      beginCallBackN = (void (GLAPIENTRY *) (GLenum)) fn;
-      break;
-    case GLU_NURBS_END:
-      endCallBackN = (void (GLAPIENTRY *) (void)) fn;
-      break;
-    case GLU_NURBS_VERTEX:
-      vertexCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_NORMAL:
-      normalCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_COLOR:
-      colorCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_TEXTURE_COORD:
-      texcoordCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_BEGIN_DATA:
-      beginCallBackData = (void (GLAPIENTRY *) (GLenum, void*)) fn;
-      break;
-    case GLU_NURBS_END_DATA:
-      endCallBackData = (void (GLAPIENTRY *) (void*)) fn;
-      break;
-    case GLU_NURBS_VERTEX_DATA:
-      vertexCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-    case GLU_NURBS_NORMAL_DATA:
-      normalCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-    case GLU_NURBS_COLOR_DATA:
-      colorCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-    case GLU_NURBS_TEXTURE_COORD_DATA:
-      texcoordCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-  }
-}
-
-void
-OpenGLCurveEvaluator::beginCallBack(GLenum which, void *data)
-{
-  if(beginCallBackData)
-    beginCallBackData(which, data);
-  else if(beginCallBackN)
-    beginCallBackN(which);
-}
-
-void
-OpenGLCurveEvaluator::endCallBack(void *data)
-{
-  if(endCallBackData)
-    endCallBackData(data);
-  else if(endCallBackN)
-    endCallBackN();
-}
-
-void
-OpenGLCurveEvaluator::vertexCallBack(const GLfloat *vert, void* data)
-{
-  if(vertexCallBackData)
-    vertexCallBackData(vert, data);
-  else if(vertexCallBackN)
-    vertexCallBackN(vert);
-}
-
-
-void
-OpenGLCurveEvaluator::normalCallBack(const GLfloat *normal, void* data)
-{
-  if(normalCallBackData)
-    normalCallBackData(normal, data);
-  else if(normalCallBackN)
-    normalCallBackN(normal);
-}
-
-void
-OpenGLCurveEvaluator::colorCallBack(const GLfloat *color, void* data)
-{
-  if(colorCallBackData)
-    colorCallBackData(color, data);
-  else if(colorCallBackN)
-    colorCallBackN(color);
-}
-
-void
-OpenGLCurveEvaluator::texcoordCallBack(const GLfloat *texcoord, void* data)
-{
-  if(texcoordCallBackData)
-    texcoordCallBackData(texcoord, data);
-  else if(texcoordCallBackN)
-    texcoordCallBackN(texcoord);
-}
diff --git a/src/glu/sgi/libnurbs/interface/glcurveval.h b/src/glu/sgi/libnurbs/interface/glcurveval.h
deleted file mode 100644
index 8fa493034b2..00000000000
--- a/src/glu/sgi/libnurbs/interface/glcurveval.h
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * glcurveval.h
- *
- */
-
-#ifndef __gluglcurveval_h_
-#define __gluglcurveval_h_
-
-#include "gluos.h"
-#include <GL/gl.h>
-#include <GL/glu.h>
-#include "basiccrveval.h"
-
-class CurveMap;
-
-/*for internal evaluator callback stuff*/
-#ifndef IN_MAX_BEZIER_ORDER
-#define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
-#endif
-			
-#ifndef IN_MAX_DIMENSION
-#define IN_MAX_DIMENSION 4 
-#endif
-
-typedef struct curveEvalMachine{
-  REAL uprime; //cached previously evaluated uprime
-  int k; //the dimension
-  REAL u1;
-  REAL u2;
-  int ustride;
-  int uorder;
-  REAL ctlpoints[IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
-  REAL ucoeff[IN_MAX_BEZIER_ORDER];//cache the polynomial values
-} curveEvalMachine;
-
-class OpenGLCurveEvaluator : public BasicCurveEvaluator  {  
-public:
-			OpenGLCurveEvaluator(void);
-			virtual ~OpenGLCurveEvaluator(void);
-    void		range1f(long, REAL *, REAL *);
-    void		domain1f(REAL, REAL);
-    void		addMap(CurveMap *);
-
-    void		enable(long);
-    void		disable(long);
-    void		bgnmap1f(long);
-    void		map1f(long, REAL, REAL, long, long, REAL *);
-    void		mapgrid1f(long, REAL, REAL);
-    void		mapmesh1f(long, long, long);
-    void		evalpoint1i(long);
-    void		evalcoord1f(long, REAL);
-    void		endmap1f(void);
-
-    void		bgnline(void);
-    void		endline(void);
-
-    void                put_vertices_call_back(int flag)
-      {
-	output_triangles = flag;
-      }
-#ifdef _WIN32
-    void               putCallBack(GLenum which, void (GLAPIENTRY *fn)() );
-#else
-    void               putCallBack(GLenum which, _GLUfuncptr fn );
-#endif
-    void               set_callback_userData(void *data)
-      {
-	userData = data;
-      }
-
-/*------------------begin for curveEvalMachine------------*/
-curveEvalMachine em_vertex;
-curveEvalMachine em_normal;
-curveEvalMachine em_color;
-curveEvalMachine em_texcoord;
-int vertex_flag; //whether there is a vertex map or not
-int normal_flag; //whether there is a normal map or not
-int color_flag; //whether there is a color map or not
-int texcoord_flag; //whether there is a texture map or not
-
-REAL global_grid_u0;
-REAL global_grid_u1;
-int global_grid_nu;
-
-void inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex
-	     int dimension,
-	     REAL ulower,
-	     REAL uupper,
-	     int ustride,
-	     int uorder,
-	     REAL *ctlpoints);
-
-void inPreEvaluate(int order, REAL vprime, REAL *coeff);
-void inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint);
-void inDoEvalCoord1(REAL u);
-void inMapMesh1f(int umin, int umax);
-
-void     (GLAPIENTRY *beginCallBackN) (GLenum type);
-void     (GLAPIENTRY *endCallBackN)   (void);
-void     (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
-void     (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
-void     (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
-void     (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
-
-void     (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
-void     (GLAPIENTRY *endCallBackData)   (void* data);
-void     (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
-void     (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
-void     (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
-void     (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
-
-void* userData; //the opaque pointer for Data callback functions
-void  beginCallBack(GLenum type, void* data);
-void endCallBack(void* data);
-void vertexCallBack(const GLfloat *vert, void *data);
-void normalCallBack(const GLfloat *normal, void* data);
-void colorCallBack(const  GLfloat *color, void* data);
-void texcoordCallBack(const GLfloat *texcoord, void* data);
-
-
-/*------------------end   for curveEvalMachine------------*/
-
-private:
-    int output_triangles; //true 1; false 0
-};
-
-#endif /* __gluglcurveval_h_ */
diff --git a/src/glu/sgi/libnurbs/interface/glimports.h b/src/glu/sgi/libnurbs/interface/glimports.h
deleted file mode 100644
index 6e69feb405e..00000000000
--- a/src/glu/sgi/libnurbs/interface/glimports.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * glimports.h
- *
- */
-
-#ifndef __gluimports_h_
-#define __gluimports_h_
-
-#include "mystdlib.h"
-#include "mystdio.h"
-
-#endif /* __gluimports_h_ */
diff --git a/src/glu/sgi/libnurbs/interface/glinterface.cc b/src/glu/sgi/libnurbs/interface/glinterface.cc
deleted file mode 100644
index ba64bcd2dcf..00000000000
--- a/src/glu/sgi/libnurbs/interface/glinterface.cc
+++ /dev/null
@@ -1,469 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <GL/gl.h>
-#include <GL/glu.h>
-#include <stdio.h>
-#include "glimports.h"
-#include "glrenderer.h"
-#include "nurbsconsts.h"
-
-//#define DOWN_LOAD_NURBS
-#ifdef DOWN_LOAD_NURBS
-
-#include "oglTrimNurbs.h"
-static int surfcount = 0;
-static oglTrimNurbs* otn = NULL;
-nurbSurf* tempNurb = NULL;
-oglTrimLoops* tempTrim = NULL;
-#endif
-
-
-//for LOD
-extern "C" {void glu_LOD_eval_list(GLUnurbs *nurb, int level);}
-
-void glu_LOD_eval_list(GLUnurbs *nurb, int level)
-{
-	nurb->LOD_eval_list(level);
-}
-
-GLUnurbs * GLAPIENTRY
-gluNewNurbsRenderer(void)
-{
-  GLUnurbs *t;
-  
-  t = new GLUnurbs();
-  return t;
-}
-
-void GLAPIENTRY
-gluDeleteNurbsRenderer(GLUnurbs *r)
-{
-    delete r;
-}
-
-extern "C"
-void GLAPIENTRY
-
-gluDeleteNurbsTessellatorEXT(GLUnurbsObj *r)
-{
-  delete r;
-}
-
-void GLAPIENTRY
-gluBeginSurface(GLUnurbs *r)
-{
-#ifdef DOWN_LOAD_NURBS
-surfcount++;
-tempTrim = OTL_make(10,10);
-#endif
-    r->bgnsurface(0); 
-}
-
-void GLAPIENTRY
-gluBeginCurve(GLUnurbs *r)
-{
-    r->bgncurve(0); 
-}
-
-void GLAPIENTRY
-gluEndCurve(GLUnurbs *r)
-{
-    r->endcurve(); 
-}
-
-void GLAPIENTRY
-gluEndSurface(GLUnurbs *r)
-{
-#ifdef DOWN_LOAD_NURBS
-if(surfcount == 1)
-  otn = OTN_make(1);
-OTN_insert(otn, tempNurb, tempTrim);
-if(surfcount  >= 1)
-{
-#ifdef DEBUG
-printf("write file\n");
-#endif
-OTN_write(otn, "out.otn");
-
-}
-#endif
-
-    r->endsurface(); 
-}
-
-void GLAPIENTRY
-gluBeginTrim(GLUnurbs *r)
-{
-#ifdef DOWN_LOAD_NURBS
-OTL_bgnTrim(tempTrim);
-#endif
-
-    r->bgntrim(); 
-}
-
-void GLAPIENTRY
-gluEndTrim(GLUnurbs *r)
-{
-#ifdef DOWN_LOAD_NURBS
-OTL_endTrim(tempTrim);
-#endif
-    r->endtrim(); 
-}
-
-void GLAPIENTRY
-gluPwlCurve(GLUnurbs *r, GLint count, INREAL array[], 
-		GLint stride, GLenum type)
-{
-#ifdef DOWN_LOAD_NURBS
-OTL_pwlCurve(tempTrim, count, array, stride, type);
-#endif
-
-    int realType;
-    switch(type) {
-      case GLU_MAP1_TRIM_2:
-	realType = N_P2D;
-	break;
-      case GLU_MAP1_TRIM_3:
-	realType = N_P2DR;
-	break;
-      default:
-	realType = type;
-	break;
-    }
-    r->pwlcurve(count, array, sizeof(INREAL) * stride, realType);
-}
-
-void GLAPIENTRY
-gluNurbsCurve(GLUnurbs *r, GLint nknots, INREAL knot[], GLint stride, 
-		  INREAL ctlarray[], GLint order, GLenum type)
-{
-#ifdef DOWN_LOAD_NURBS
-OTL_nurbsCurve(tempTrim, nknots, knot, stride, ctlarray, order, type);
-#endif
-
-    int realType;
-
-    switch(type) {
-      case GLU_MAP1_TRIM_2:
-	realType = N_P2D;
-	break;
-      case GLU_MAP1_TRIM_3:
-	realType = N_P2DR;
-	break;
-      default:
-	realType = type;
-	break;
-    }
-
-    r->nurbscurve(nknots, knot, sizeof(INREAL) * stride, ctlarray, order, 
-	    realType);
-}
-
-void GLAPIENTRY
-gluNurbsSurface(GLUnurbs *r, GLint sknot_count, GLfloat *sknot, 
-			    GLint tknot_count, GLfloat *tknot, 
-			    GLint s_stride, GLint t_stride, 
-			    GLfloat *ctlarray, GLint sorder, GLint torder, 
-			    GLenum type)
-{
-#ifdef DOWN_LOAD_NURBS
-  {
-    int dimension;
-    switch(type){
-    case GL_MAP2_VERTEX_3:
-      dimension = 3;
-      break;
-    case GL_MAP2_VERTEX_4:
-      dimension = 4;
-      break;
-    default:
-      fprintf(stderr, "error in glinterface.c++, type no implemented\n");
-      exit(1);
-    }
-tempNurb = nurbSurfMake(sknot_count, sknot,
-			tknot_count, tknot,
-			sorder, torder,
-			dimension,
-			ctlarray,
-			s_stride, t_stride);
-			
-  }
-#endif
-
-    r->nurbssurface(sknot_count, sknot, tknot_count, tknot, 
-	    sizeof(INREAL) * s_stride, sizeof(INREAL) * t_stride, 
-	    ctlarray, sorder, torder, type);
-}
-
-void GLAPIENTRY
-gluLoadSamplingMatrices(GLUnurbs *r, const GLfloat modelMatrix[16],
-			    const GLfloat projMatrix[16], 
-			    const GLint viewport[4])
-{
-    r->useGLMatrices(modelMatrix, projMatrix, viewport);
-}
-
-void GLAPIENTRY
-gluNurbsProperty(GLUnurbs *r, GLenum property, GLfloat value)
-{
-    GLfloat nurbsValue;
-    
-    switch (property) {
-      case GLU_AUTO_LOAD_MATRIX:      
-        r->setautoloadmode(value);
-	return;
-
-      case GLU_CULLING:
-	if (value != 0.0) {
-	    nurbsValue = N_CULLINGON;
-	} else {
-	    nurbsValue = N_NOCULLING;
-	}
-	r->setnurbsproperty(GL_MAP2_VERTEX_3, N_CULLING, nurbsValue);
-	r->setnurbsproperty(GL_MAP2_VERTEX_4, N_CULLING, nurbsValue);
-	r->setnurbsproperty(GL_MAP1_VERTEX_3, N_CULLING, nurbsValue);
-	r->setnurbsproperty(GL_MAP1_VERTEX_4, N_CULLING, nurbsValue);
-        return;
-
-      case GLU_SAMPLING_METHOD:
-	if (value == GLU_PATH_LENGTH) {
-	    nurbsValue = N_PATHLENGTH;
-	} else if (value == GLU_PARAMETRIC_ERROR) {
-	    nurbsValue = N_PARAMETRICDISTANCE;
-	} else if (value == GLU_DOMAIN_DISTANCE) {
-	    nurbsValue = N_DOMAINDISTANCE;
-            r->set_is_domain_distance_sampling(1); //optimzing untrimmed case
-
-	} else if (value == GLU_OBJECT_PARAMETRIC_ERROR) {
-	    nurbsValue = N_OBJECTSPACE_PARA;
-	    r->setautoloadmode( 0.0 ); 
-	    r->setSamplingMatrixIdentity();
-	} else if (value == GLU_OBJECT_PATH_LENGTH) {
-	    nurbsValue = N_OBJECTSPACE_PATH;
-	    r->setautoloadmode( 0.0 ); 
-	    r->setSamplingMatrixIdentity();
-	} else {
-            r->postError(GLU_INVALID_VALUE);
-            return;
-        }
-
-	r->setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMETHOD, nurbsValue);
-	r->setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMETHOD, nurbsValue);
-	r->setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMETHOD, nurbsValue);
-	r->setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMETHOD, nurbsValue);
-	return;
-
-      case GLU_SAMPLING_TOLERANCE:
-	r->setnurbsproperty(GL_MAP2_VERTEX_3, N_PIXEL_TOLERANCE, value);
-	r->setnurbsproperty(GL_MAP2_VERTEX_4, N_PIXEL_TOLERANCE, value);
-	r->setnurbsproperty(GL_MAP1_VERTEX_3, N_PIXEL_TOLERANCE, value);
-	r->setnurbsproperty(GL_MAP1_VERTEX_4, N_PIXEL_TOLERANCE, value);
-	return;
-
-      case GLU_PARAMETRIC_TOLERANCE:
-	r->setnurbsproperty(GL_MAP2_VERTEX_3, N_ERROR_TOLERANCE, value);
-        r->setnurbsproperty(GL_MAP2_VERTEX_4, N_ERROR_TOLERANCE, value);
-        r->setnurbsproperty(GL_MAP1_VERTEX_3, N_ERROR_TOLERANCE, value);
-        r->setnurbsproperty(GL_MAP1_VERTEX_4, N_ERROR_TOLERANCE, value);
-        return;
-	
-
-      case GLU_DISPLAY_MODE:
-	
-	if (value == GLU_FILL) {
-	  nurbsValue = N_FILL;
-	} else if (value == GLU_OUTLINE_POLYGON) {
-	  nurbsValue = N_OUTLINE_POLY;
-	} else if (value == GLU_OUTLINE_PATCH) {
-	  nurbsValue = N_OUTLINE_PATCH;
-	} else {
-	  r->postError(GLU_INVALID_VALUE);
-	  return;
-	}
-	r->setnurbsproperty(N_DISPLAY, nurbsValue);
-	
-	break;
-
-      case GLU_U_STEP:
-    	r->setnurbsproperty(GL_MAP1_VERTEX_3, N_S_STEPS, value);
-    	r->setnurbsproperty(GL_MAP1_VERTEX_4, N_S_STEPS, value);
-    	r->setnurbsproperty(GL_MAP2_VERTEX_3, N_S_STEPS, value);
-    	r->setnurbsproperty(GL_MAP2_VERTEX_4, N_S_STEPS, value);
-	
-	//added for optimizing untrimmed case
-        r->set_domain_distance_u_rate(value);
-	break;
-
-      case GLU_V_STEP:
-        r->setnurbsproperty(GL_MAP1_VERTEX_3, N_T_STEPS, value);
-        r->setnurbsproperty(GL_MAP1_VERTEX_4, N_T_STEPS, value);
-        r->setnurbsproperty(GL_MAP2_VERTEX_3, N_T_STEPS, value);
-        r->setnurbsproperty(GL_MAP2_VERTEX_4, N_T_STEPS, value);
-
-	//added for optimizing untrimmed case
-        r->set_domain_distance_v_rate(value);
-	break;
-	
-      case GLU_NURBS_MODE:
-	if(value == GLU_NURBS_RENDERER)
-	  r->put_callbackFlag(0);
-	else if(value == GLU_NURBS_TESSELLATOR)
-	  r->put_callbackFlag(1);
-	else
-	  r->postError(GLU_INVALID_ENUM);
-	break;
-
-      default:
-	r->postError(GLU_INVALID_ENUM);
-	return;	
-    }
-}
-
-void GLAPIENTRY
-gluGetNurbsProperty(GLUnurbs *r, GLenum property, GLfloat *value)
-{
-    GLfloat nurbsValue;
-
-    switch(property) {
-      case GLU_AUTO_LOAD_MATRIX:
-	if (r->getautoloadmode()) {
-	    *value = GL_TRUE;
-	} else {
-	    *value = GL_FALSE;
-	}
-	break;
-      case GLU_CULLING:
-	r->getnurbsproperty(GL_MAP2_VERTEX_3, N_CULLING, &nurbsValue);
-	if (nurbsValue == N_CULLINGON) {
-	    *value = GL_TRUE;
-	} else {
-	    *value = GL_FALSE;
-	}
-	break;
-      case GLU_SAMPLING_METHOD:
-	r->getnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMETHOD, value);
-	if(*value == N_PATHLENGTH)
-	  *value = GLU_PATH_LENGTH;
-	else if(*value == N_PARAMETRICDISTANCE)
-	  *value = GLU_PARAMETRIC_ERROR;
-	else if(*value == N_DOMAINDISTANCE)
-	  *value = GLU_DOMAIN_DISTANCE;
-	else if(*value == N_OBJECTSPACE_PATH)
-	  *value = GLU_OBJECT_PATH_LENGTH;
-	else if(*value == N_OBJECTSPACE_PARA)
-	  *value = GLU_OBJECT_PARAMETRIC_ERROR;	
-	break;
-      case GLU_SAMPLING_TOLERANCE:
-	r->getnurbsproperty(GL_MAP2_VERTEX_3, N_PIXEL_TOLERANCE, value);
-	break;
-      case GLU_PARAMETRIC_TOLERANCE:
-	r->getnurbsproperty(GL_MAP2_VERTEX_3, N_ERROR_TOLERANCE, value);
-        break;
-
-      case GLU_U_STEP:
-    	r->getnurbsproperty(GL_MAP2_VERTEX_3, N_S_STEPS, value);
-	break;
-      case GLU_V_STEP:
-    	r->getnurbsproperty(GL_MAP2_VERTEX_3, N_T_STEPS, value);
-	break;
-      case GLU_DISPLAY_MODE:
-	r->getnurbsproperty(N_DISPLAY, &nurbsValue);
-	if (nurbsValue == N_FILL) {
-	    *value = GLU_FILL;
-	} else if (nurbsValue == N_OUTLINE_POLY) {
-	    *value = GLU_OUTLINE_POLYGON;
-	} else {
-	    *value = GLU_OUTLINE_PATCH;
-	}
-	break;
-
-      case GLU_NURBS_MODE:
-	if(r->is_callback())
-	  *value = GLU_NURBS_TESSELLATOR;
-	else
-	  *value = GLU_NURBS_RENDERER;
-	break;
-	
-      default:
-	r->postError(GLU_INVALID_ENUM);
-	return;
-    }
-}
-
-extern "C" void GLAPIENTRY
-gluNurbsCallback(GLUnurbs *r, GLenum which, _GLUfuncptr fn )
-{
-    switch (which) {
-    case GLU_NURBS_BEGIN:
-    case GLU_NURBS_END:
-    case GLU_NURBS_VERTEX:
-    case GLU_NURBS_NORMAL:
-    case GLU_NURBS_TEXTURE_COORD:
-    case GLU_NURBS_COLOR:
-    case GLU_NURBS_BEGIN_DATA:
-    case GLU_NURBS_END_DATA:
-    case GLU_NURBS_VERTEX_DATA:
-    case GLU_NURBS_NORMAL_DATA:
-    case GLU_NURBS_TEXTURE_COORD_DATA:
-    case GLU_NURBS_COLOR_DATA: 
-	r->putSurfCallBack(which, fn);
-	break;
-
-    case GLU_NURBS_ERROR:
-	r->errorCallback = (void (APIENTRY *)( GLenum e )) fn;
-	break;
-    default:
-	r->postError(GLU_INVALID_ENUM);
-	return;
-    }
-}
-
-extern "C"
-void GLAPIENTRY
-gluNurbsCallbackDataEXT(GLUnurbs* r, void* userData)
-{
-  r->setNurbsCallbackData(userData);
-}
-
-extern "C"
-void GLAPIENTRY
-gluNurbsCallbackData(GLUnurbs* r, void* userData)
-{
-  gluNurbsCallbackDataEXT(r,userData);
-}
diff --git a/src/glu/sgi/libnurbs/interface/glrenderer.cc b/src/glu/sgi/libnurbs/interface/glrenderer.cc
deleted file mode 100644
index 17123fbc614..00000000000
--- a/src/glu/sgi/libnurbs/interface/glrenderer.cc
+++ /dev/null
@@ -1,301 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include "glimports.h"
-#include "glrenderer.h"
-
-GLUnurbs::GLUnurbs()
-	: NurbsTessellator(curveEvaluator, surfaceEvaluator)
-{
-    redefineMaps();
-    defineMap(GL_MAP2_NORMAL, 0, 3);
-    defineMap(GL_MAP1_NORMAL, 0, 3);
-    defineMap(GL_MAP2_TEXTURE_COORD_1, 0, 1);
-    defineMap(GL_MAP1_TEXTURE_COORD_1, 0, 1);
-    defineMap(GL_MAP2_TEXTURE_COORD_2, 0, 2);
-    defineMap(GL_MAP1_TEXTURE_COORD_2, 0, 2);
-    defineMap(GL_MAP2_TEXTURE_COORD_3, 0, 3);
-    defineMap(GL_MAP1_TEXTURE_COORD_3, 0, 3);
-    defineMap(GL_MAP2_TEXTURE_COORD_4, 1, 4);
-    defineMap(GL_MAP1_TEXTURE_COORD_4, 1, 4);
-    defineMap(GL_MAP2_VERTEX_4, 1, 4);
-    defineMap(GL_MAP1_VERTEX_4, 1, 4);
-    defineMap(GL_MAP2_VERTEX_3, 0, 3);
-    defineMap(GL_MAP1_VERTEX_3, 0, 3);
-    defineMap(GL_MAP2_COLOR_4, 0, 4);
-    defineMap(GL_MAP1_COLOR_4, 0, 4);
-    defineMap(GL_MAP2_INDEX, 0, 1);
-    defineMap(GL_MAP1_INDEX, 0, 1);
-
-    setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
-    setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
-    setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
-    setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMETHOD, (float) N_PATHLENGTH);
-
-    setnurbsproperty(GL_MAP1_VERTEX_3, N_PIXEL_TOLERANCE, (float) 50.0);
-    setnurbsproperty(GL_MAP1_VERTEX_4, N_PIXEL_TOLERANCE, (float) 50.0);
-    setnurbsproperty(GL_MAP2_VERTEX_3, N_PIXEL_TOLERANCE, (float) 50.0);
-    setnurbsproperty(GL_MAP2_VERTEX_4, N_PIXEL_TOLERANCE, (float) 50.0);
-
-    setnurbsproperty(GL_MAP1_VERTEX_3, N_ERROR_TOLERANCE, (float) 0.50);
-    setnurbsproperty(GL_MAP1_VERTEX_4, N_ERROR_TOLERANCE, (float) 0.50);
-    setnurbsproperty(GL_MAP2_VERTEX_3, N_ERROR_TOLERANCE, (float) 0.50);
-    setnurbsproperty(GL_MAP2_VERTEX_4, N_ERROR_TOLERANCE, (float) 0.50);
-
-    setnurbsproperty(GL_MAP1_VERTEX_3, N_S_STEPS, (float) 100.0);
-    setnurbsproperty(GL_MAP1_VERTEX_4, N_S_STEPS, (float) 100.0);
-    setnurbsproperty(GL_MAP2_VERTEX_3, N_S_STEPS, (float) 100.0);
-    setnurbsproperty(GL_MAP2_VERTEX_4, N_S_STEPS, (float) 100.0);
-
-    //added for optimizing untrimmed case
-    set_domain_distance_u_rate(100.0);
-
-    setnurbsproperty(GL_MAP1_VERTEX_3, N_T_STEPS, (float) 100.0);
-    setnurbsproperty(GL_MAP1_VERTEX_4, N_T_STEPS, (float) 100.0);
-    setnurbsproperty(GL_MAP2_VERTEX_3, N_T_STEPS, (float) 100.0);
-    setnurbsproperty(GL_MAP2_VERTEX_4, N_T_STEPS, (float) 100.0);
-
-    //added for optimizing untrimmed case
-    set_domain_distance_v_rate(100.0);
-    set_is_domain_distance_sampling(0); //since the default is path_length
-
-    //default autoloadmode is true
-    autoloadmode = 1;
-
-    //default callbackFlag is 0
-    callbackFlag = 0;
-
-    errorCallback = NULL;
-}
-
-void
-GLUnurbs::bgnrender(void)
-{
-    if (autoloadmode) {
-	loadGLMatrices();
-    }
-}
-
-void
-GLUnurbs::endrender(void)
-{
-}
-
-void
-GLUnurbs::errorHandler(int i)
-{
-    int gluError;
-
-    gluError = i + (GLU_NURBS_ERROR1 - 1);
-    postError( gluError );
-}
-
-void
-GLUnurbs::loadGLMatrices(void)
-{
-    GLfloat vmat[4][4];
-    GLint viewport[4];
-
-    grabGLMatrix((GLfloat (*)[4]) vmat);
-    loadCullingMatrix((GLfloat (*)[4]) vmat);
-    ::glGetIntegerv((GLenum) GL_VIEWPORT, (GLint *) viewport);
-    loadSamplingMatrix((const GLfloat (*)[4]) vmat, (const GLint *) viewport);
-}
-
-void
-GLUnurbs::useGLMatrices(const GLfloat modelMatrix[16],
-			  const GLfloat projMatrix[16],
-			  const GLint viewport[4])
-{
-    GLfloat vmat[4][4];
-
-    multmatrix4d(vmat, (const GLfloat (*)[4]) modelMatrix,
-	    (const GLfloat (*)[4]) projMatrix);
-    loadCullingMatrix((GLfloat (*)[4]) vmat);
-    loadSamplingMatrix((const GLfloat (*)[4]) vmat, (const GLint *) viewport);
-}
-
-/*--------------------------------------------------------------------------
- * grabGLMatrix
- *--------------------------------------------------------------------------
- */
-
-void
-GLUnurbs::grabGLMatrix(GLfloat vmat[4][4])
-{
-    GLfloat m1[4][4], m2[4][4];
-
-    ::glGetFloatv((GLenum) GL_MODELVIEW_MATRIX, (GLfloat *) &(m1[0][0]));
-    ::glGetFloatv((GLenum) GL_PROJECTION_MATRIX, (GLfloat *) &(m2[0][0]));
-    multmatrix4d((GLfloat (*)[4]) vmat,
-	    (const GLfloat (*)[4]) m1, (const GLfloat (*)[4]) m2);
-}
-
-//for object space tesselation: view independent
-void
-GLUnurbs::setSamplingMatrixIdentity( void )
-{
-  INREAL smat[4][4] = {
-    {1,0,0,0},
-    {0,1,0,0},
-    {0,0,1,0},
-    {0,0,0,1}
-  };
-  const long rstride = sizeof(smat[0]) / sizeof(smat[0][0]);
-  const long cstride = 1;
-
-  setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-		   cstride);
-  setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-		   cstride);
-  setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-		   cstride);
-  setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-		   cstride);
-}
-
-
-void
-GLUnurbs::loadSamplingMatrix(const GLfloat vmat[4][4],
-			       const GLint viewport[4])
-{
-
-    /* rescale the mapping to correspond to pixels in x/y */
-    REAL xsize = 0.5 * (REAL) (viewport[2]);
-    REAL ysize = 0.5 * (REAL) (viewport[3]);
-
-    INREAL smat[4][4];
-    smat[0][0] = vmat[0][0] * xsize;
-    smat[1][0] = vmat[1][0] * xsize;
-    smat[2][0] = vmat[2][0] * xsize;
-    smat[3][0] = vmat[3][0] * xsize;
-
-    smat[0][1] = vmat[0][1] * ysize;
-    smat[1][1] = vmat[1][1] * ysize;
-    smat[2][1] = vmat[2][1] * ysize;
-    smat[3][1] = vmat[3][1] * ysize;
-
-    smat[0][2] = 0.0;
-    smat[1][2] = 0.0;
-    smat[2][2] = 0.0;
-    smat[3][2] = 0.0;
-
-    smat[0][3] = vmat[0][3];
-    smat[1][3] = vmat[1][3];
-    smat[2][3] = vmat[2][3];
-    smat[3][3] = vmat[3][3];
-
-    const long rstride = sizeof(smat[0]) / sizeof(smat[0][0]);
-    const long cstride = 1;
-
-    setnurbsproperty(GL_MAP1_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-	    cstride);
-    setnurbsproperty(GL_MAP1_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-	    cstride);
-    setnurbsproperty(GL_MAP2_VERTEX_3, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-	    cstride);
-    setnurbsproperty(GL_MAP2_VERTEX_4, N_SAMPLINGMATRIX, &smat[0][0], rstride,
-	    cstride);
-}
-
-void
-GLUnurbs::loadCullingMatrix(GLfloat vmat[4][4])
-{
-    INREAL cmat[4][4];
-
-    cmat[0][0] = vmat[0][0];
-    cmat[0][1] = vmat[0][1];
-    cmat[0][2] = vmat[0][2];
-    cmat[0][3] = vmat[0][3];
-
-    cmat[1][0] = vmat[1][0];
-    cmat[1][1] = vmat[1][1];
-    cmat[1][2] = vmat[1][2];
-    cmat[1][3] = vmat[1][3];
-
-    cmat[2][0] = vmat[2][0];
-    cmat[2][1] = vmat[2][1];
-    cmat[2][2] = vmat[2][2];
-    cmat[2][3] = vmat[2][3];
-
-    cmat[3][0] = vmat[3][0];
-    cmat[3][1] = vmat[3][1];
-    cmat[3][2] = vmat[3][2];
-    cmat[3][3] = vmat[3][3];
-
-    const long rstride = sizeof(cmat[0]) / sizeof(cmat[0][0]);
-    const long cstride = 1;
-
-    setnurbsproperty(GL_MAP2_VERTEX_3, N_CULLINGMATRIX, &cmat[0][0], rstride,
-	    cstride);
-    setnurbsproperty(GL_MAP2_VERTEX_4, N_CULLINGMATRIX, &cmat[0][0], rstride,
-	    cstride);
-	//added for curves by zl
-    setnurbsproperty(GL_MAP1_VERTEX_3, N_CULLINGMATRIX, &cmat[0][0], rstride,
-	    cstride);
-    setnurbsproperty(GL_MAP1_VERTEX_4, N_CULLINGMATRIX, &cmat[0][0], rstride,
-	    cstride);
-}
-
-/*---------------------------------------------------------------------
- * A = B * MAT ; transform a 4d vector through a 4x4 matrix
- *---------------------------------------------------------------------
- */
-void
-GLUnurbs::transform4d(GLfloat A[4], GLfloat B[4], GLfloat mat[4][4])
-{
-
-    A[0] = B[0]*mat[0][0] + B[1]*mat[1][0] + B[2]*mat[2][0] + B[3]*mat[3][0];
-    A[1] = B[0]*mat[0][1] + B[1]*mat[1][1] + B[2]*mat[2][1] + B[3]*mat[3][1];
-    A[2] = B[0]*mat[0][2] + B[1]*mat[1][2] + B[2]*mat[2][2] + B[3]*mat[3][2];
-    A[3] = B[0]*mat[0][3] + B[1]*mat[1][3] + B[2]*mat[2][3] + B[3]*mat[3][3];
-}
-
-/*---------------------------------------------------------------------
- * new = [left][right] ; multiply two matrices together
- *---------------------------------------------------------------------
- */
-void
-GLUnurbs::multmatrix4d (GLfloat n[4][4], const GLfloat left[4][4],
-		 const GLfloat right[4][4])
-{
-    transform4d ((GLfloat *) n[0],(GLfloat *) left[0],(GLfloat (*)[4]) right);
-    transform4d ((GLfloat *) n[1],(GLfloat *) left[1],(GLfloat (*)[4]) right);
-    transform4d ((GLfloat *) n[2],(GLfloat *) left[2],(GLfloat (*)[4]) right);
-    transform4d ((GLfloat *) n[3],(GLfloat *) left[3],(GLfloat (*)[4]) right);
-}
diff --git a/src/glu/sgi/libnurbs/interface/glrenderer.h b/src/glu/sgi/libnurbs/interface/glrenderer.h
deleted file mode 100644
index 3b72d44d1fd..00000000000
--- a/src/glu/sgi/libnurbs/interface/glrenderer.h
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * glrenderer.h
- *
- */
-
-#ifndef __gluglrenderer_h_
-#define __gluglrenderer_h_
-
-#include <GL/gl.h>
-#include <GL/glu.h>
-#include "nurbstess.h"
-#include "glsurfeval.h"
-#include "glcurveval.h"
-
-extern "C" {
-      typedef void (APIENTRY *errorCallbackType)( GLenum );
-}
-
-class GLUnurbs : public NurbsTessellator {
-
-public:
-		GLUnurbs( void );
-    void 	loadGLMatrices( void );
-    void	useGLMatrices( const GLfloat modelMatrix[16], 
-			       const GLfloat projMatrix[16],
-			       const GLint viewport[4] );
-    void		setSamplingMatrixIdentity( void );
-
-    void 	errorHandler( int );
-    void	bgnrender( void );
-    void	endrender( void );
-    void	setautoloadmode( INREAL value )
-      		    { 
-		      
-		      if (value) autoloadmode = GL_TRUE; 
-		      else autoloadmode = GL_FALSE; 
-			
-		    }
-    GLboolean	getautoloadmode( void ) { return autoloadmode; }
-
-    errorCallbackType errorCallback;
-    void	postError( int which ) 
-		    { if (errorCallback) (errorCallback)( (GLenum)which ); }
-#ifdef _WIN32
-    void        putSurfCallBack(GLenum which, void (GLAPIENTRY *fn)() )
-#else
-    void        putSurfCallBack(GLenum which, _GLUfuncptr fn )
-#endif
-      {
-	curveEvaluator.putCallBack(which, fn);
-	surfaceEvaluator.putCallBack(which, fn);
-      }
-
-    int         get_vertices_call_back()
-      {
-	return surfaceEvaluator.get_vertices_call_back();
-      }
-    
-    void        put_vertices_call_back(int flag)
-      {
-	surfaceEvaluator.put_vertices_call_back(flag);
-      }
-
-    int         get_callback_auto_normal()
-      {
-        return surfaceEvaluator.get_callback_auto_normal();
-      }
- 
-    void         put_callback_auto_normal(int flag)
-      {
-        surfaceEvaluator.put_callback_auto_normal(flag);
-      }
-
-    void       setNurbsCallbackData(void* userData)
-      {
-       curveEvaluator.set_callback_userData(userData);
-       surfaceEvaluator.set_callback_userData(userData);
-     }
-
-
-    //for LOD
-    void LOD_eval_list(int level)
-      {
-	surfaceEvaluator.LOD_eval_list(level);
-      }
-
-    //NEWCALLBACK
-    int        is_callback()
-      {
-	return callbackFlag;
-      }
-    void       put_callbackFlag(int flag)
-      {
-	callbackFlag = flag;
-	surfaceEvaluator.put_vertices_call_back(flag);
-	curveEvaluator.put_vertices_call_back(flag);
-      }
-
-private:
-    GLboolean			autoloadmode;
-    OpenGLSurfaceEvaluator	surfaceEvaluator;
-    OpenGLCurveEvaluator	curveEvaluator;
-
-    void		loadSamplingMatrix( const GLfloat vmat[4][4], 
-			        const GLint viewport[4] );
-    void		loadCullingMatrix( GLfloat vmat[4][4] );
-    static void		grabGLMatrix( GLfloat vmat[4][4] );
-    static void		transform4d( GLfloat A[4], GLfloat B[4], 
-				GLfloat mat[4][4] );
-    static void		multmatrix4d( GLfloat n[4][4], const GLfloat left[4][4],
-				const GLfloat right[4][4] );
-
-   int                  callbackFlag;
-};
-
-#endif /* __gluglrenderer_h_ */
diff --git a/src/glu/sgi/libnurbs/interface/glsurfeval.cc b/src/glu/sgi/libnurbs/interface/glsurfeval.cc
deleted file mode 100644
index b5bfab1e281..00000000000
--- a/src/glu/sgi/libnurbs/interface/glsurfeval.cc
+++ /dev/null
@@ -1,1293 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * glsurfeval.c++
- *
- */
-
-/* Polynomial Evaluator Interface */
-#include "gluos.h"
-#include <stdio.h>
-#include "glimports.h"
-#include "glrenderer.h"
-#include "glsurfeval.h"
-#include "nurbsconsts.h"
-#include "bezierPatchMesh.h"
-
-
-//extern int surfcount;
-//int surfcount=0;
-
-/*#define USE_INTERNAL_EVAL*/ //use internal evaluator
-
-/*whether do evaluation or not*/
-/*#define NO_EVALUATION*/
-
-//#define USE_LOD //for LOD test, have to turn on USE_LOD in insurfeval.c++ too
-
-/*for statistics*/
-//#define STATISTICS
-#ifdef STATISTICS
-static int STAT_num_of_triangles=0;
-static int STAT_num_of_eval_vertices=0;
-static int STAT_num_of_quad_strips=0;
-#endif
-
-/*for output triangles*/
-/*#define OUTPUT_TRIANGLES*/
-
-
-/*#define FOR_CHRIS*/
-#ifdef FOR_CHRIS
-extern "C"  {  void                evalUStripExt(int n_upper, REAL v_upper, REAL* upper_val,
-				   int n_lower, REAL v_lower, REAL* lower_val);}
-
-extern "C" {   void                evalVStripExt(int n_left, REAL u_left, REAL* left_val,
-				   int n_right, REAL u_right, REAL* right_val);
-	     }
-#endif
-
-
-/**************begin for LOD_eval_list***********/
-void OpenGLSurfaceEvaluator::LOD_eval_list(int level)
-{
-  if(level == 0)
-    LOD_eval_level = 1;
-  else if(level == 1)
-    LOD_eval_level = 2;
-  else if(level == 2)
-    LOD_eval_level = 4;
-  else
-    LOD_eval_level = 8;
-
-  inBPMListEvalEM(global_bpm);
-}
-
-
-OpenGLSurfaceEvaluator::OpenGLSurfaceEvaluator()
-{
-    int i;
-
-    for (i=0; i<VERTEX_CACHE_SIZE; i++) {
-	vertexCache[i] = new StoredVertex;
-    }
-    tmeshing = 0;
-    which = 0;
-    vcount = 0;
-
-    global_uorder = 0;
-    global_vorder = 0;
-    global_uprime = -1.0;
-    global_vprime = -1.0;
-    global_vprime_BV = -1.0;
-    global_uprime_BU = -1.0;
-    global_uorder_BU = 0;
-    global_vorder_BU = 0;
-    global_uorder_BV = 0;
-    global_vorder_BV = 0;
-    global_baseData = NULL;
-        
-    global_bpm = NULL;
-    output_triangles = 0; //don't output triangles by default
-
-    //no default callback functions
-    beginCallBackN = NULL;
-    endCallBackN = NULL;
-    vertexCallBackN = NULL;
-    normalCallBackN = NULL;
-    colorCallBackN = NULL;
-    texcoordCallBackN = NULL;
-    beginCallBackData = NULL;
-    endCallBackData = NULL;
-    vertexCallBackData = NULL;
-    normalCallBackData = NULL;
-    colorCallBackData = NULL;
-    texcoordCallBackData = NULL;
-
-    userData = NULL;
-
-    auto_normal_flag = 0;
-    callback_auto_normal = 0; //default of GLU_CALLBACK_AUTO_NORMAL is 0
-    vertex_flag = 0;
-    normal_flag = 0;
-    color_flag = 0;
-    texcoord_flag = 0;
-
-    em_vertex.uprime = -1.0;
-    em_vertex.vprime = -1.0;
-    em_normal.uprime = -1.0;
-    em_normal.vprime = -1.0;
-    em_color.uprime = -1.0;
-    em_color.vprime = -1.0;
-    em_texcoord.uprime = -1.0;
-    em_texcoord.vprime = -1.0;
-
-#ifdef USE_LOD
-    LOD_eval_level = 1;
-#endif
-}
-
-OpenGLSurfaceEvaluator::~OpenGLSurfaceEvaluator()
-{
-   for (int ii= 0; ii< VERTEX_CACHE_SIZE; ii++) {
-      delete vertexCache[ii];
-      vertexCache[ii]= 0;
-   }
-}
-
-/*---------------------------------------------------------------------------
- * disable - turn off a map
- *---------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::disable(long type)
-{
-    glDisable((GLenum) type);
-}
-
-/*---------------------------------------------------------------------------
- * enable - turn on a map
- *---------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::enable(long type)
-{
-    glEnable((GLenum) type);
-}
-
-/*-------------------------------------------------------------------------
- * mapgrid2f - define a lattice of points with origin and offset
- *-------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::mapgrid2f(long nu, REAL u0, REAL u1, long nv, REAL v0, REAL v1)
-{
-#ifdef USE_INTERNAL_EVAL
-  inMapGrid2f((int) nu, (REAL) u0, (REAL) u1, (int) nv,
-	      (REAL) v0, (REAL) v1);
-#else
-
-  if(output_triangles)  
-    {
-      global_grid_u0 = u0;
-      global_grid_u1 = u1;
-      global_grid_nu = nu;
-      global_grid_v0 = v0;
-      global_grid_v1 = v1;
-      global_grid_nv = nv;
-    }
-  else
-    glMapGrid2d((GLint) nu, (GLdouble) u0, (GLdouble) u1, (GLint) nv,
-	    (GLdouble) v0, (GLdouble) v1);
-
-#endif
-}
-
-void
-OpenGLSurfaceEvaluator::polymode(long style)
-{
-  if(! output_triangles)
-    {
-      switch(style) {
-      default:
-      case N_MESHFILL:
-        
-	glPolygonMode((GLenum) GL_FRONT_AND_BACK, (GLenum) GL_FILL);
-	break;
-      case N_MESHLINE:
-	glPolygonMode((GLenum) GL_FRONT_AND_BACK, (GLenum) GL_LINE);
-	break;
-      case N_MESHPOINT:
-	glPolygonMode((GLenum) GL_FRONT_AND_BACK, (GLenum) GL_POINT);
-	break;
-      }
-    }
-}
-
-void
-OpenGLSurfaceEvaluator::bgnline(void)
-{
-  if(output_triangles)
-    bezierPatchMeshBeginStrip(global_bpm, GL_LINE_STRIP);
-  else
-    glBegin((GLenum) GL_LINE_STRIP);
-}
-
-void
-OpenGLSurfaceEvaluator::endline(void)
-{
-  if(output_triangles)
-    bezierPatchMeshEndStrip(global_bpm);
-  else
-    glEnd();
-}
-
-void
-OpenGLSurfaceEvaluator::range2f(long type, REAL *from, REAL *to)
-{
-}
-
-void
-OpenGLSurfaceEvaluator::domain2f(REAL ulo, REAL uhi, REAL vlo, REAL vhi)
-{
-}
-
-void
-OpenGLSurfaceEvaluator::bgnclosedline(void)
-{
-  if(output_triangles)
-    bezierPatchMeshBeginStrip(global_bpm, GL_LINE_LOOP);
-  else
-    glBegin((GLenum) GL_LINE_LOOP);
-}
-
-void
-OpenGLSurfaceEvaluator::endclosedline(void)
-{
-  if(output_triangles)
-    bezierPatchMeshEndStrip(global_bpm);
-  else
-    glEnd();
-}
-
-
-
-
-
-void
-OpenGLSurfaceEvaluator::bgntmesh(void)
-{
-
-    tmeshing = 1;
-    which = 0;
-    vcount = 0;
-
-    if(output_triangles)
-      bezierPatchMeshBeginStrip(global_bpm, GL_TRIANGLES);
-    else
-      glBegin((GLenum) GL_TRIANGLES);
-
-}
-
-void
-OpenGLSurfaceEvaluator::swaptmesh(void)
-{
-    which = 1 - which;
-
-}
-
-void
-OpenGLSurfaceEvaluator::endtmesh(void)
-{
-    tmeshing = 0;
-
-
-    if(output_triangles)
-      bezierPatchMeshEndStrip(global_bpm);
-    else
-      glEnd();
-}
-
-void
-OpenGLSurfaceEvaluator::bgntfan(void)
-{
-
-  if(output_triangles)
-    bezierPatchMeshBeginStrip(global_bpm, GL_TRIANGLE_FAN);
-  else
-    glBegin((GLenum) GL_TRIANGLE_FAN);
-
-}
-void
-OpenGLSurfaceEvaluator::endtfan(void)
-{
-  if(output_triangles)
-	bezierPatchMeshEndStrip(global_bpm);
-  else
-    glEnd();
-}
-
-void
-OpenGLSurfaceEvaluator::evalUStrip(int n_upper, REAL v_upper, REAL* upper_val, int n_lower, REAL v_lower, REAL* lower_val)
-{
-#ifdef USE_INTERNAL_EVAL
-  inEvalUStrip(n_upper, v_upper, upper_val,
-	n_lower, v_lower, lower_val);
-#else
-
-#ifdef FOR_CHRIS
-  evalUStripExt(n_upper, v_upper, upper_val,
-		 n_lower, v_lower, lower_val);
-  return;
-
-#endif
-  int i,j,k,l;
-  REAL leftMostV[2];
-
-  /*
-   *the algorithm works by scanning from left to right.
-   *leftMostV: the left most of the remaining verteces (on both upper and lower).
-   *	       it could an element of upperVerts or lowerVerts.
-   *i: upperVerts[i] is the first vertex to the right of leftMostV on upper line
-   *j: lowerVerts[j] is the first vertex to the right of leftMostV on lower line
-   */
-
-  /*initialize i,j,and leftMostV
-   */
-  if(upper_val[0] <= lower_val[0])
-    {
-      i=1;
-      j=0;
-
-      leftMostV[0] = upper_val[0];
-      leftMostV[1] = v_upper;
-    }
-  else
-    {
-      i=0;
-      j=1;
-
-      leftMostV[0] = lower_val[0];
-      leftMostV[1] = v_lower;
-
-    }
-
-  /*the main loop.
-   *the invariance is that:
-   *at the beginning of each loop, the meaning of i,j,and leftMostV are
-   *maintained
-   */
-  while(1)
-    {
-      if(i >= n_upper) /*case1: no more in upper*/
-	{
-	  if(j<n_lower-1) /*at least two vertices in lower*/
-	    {
-	      bgntfan();
-	      coord2f(leftMostV[0], leftMostV[1]);
-//	      glNormal3fv(leftMostNormal);
-//		glVertex3fv(leftMostXYZ);
-
-	      while(j<n_lower){
-		coord2f(lower_val[j], v_lower);
-//		glNormal3fv(lowerNormal[j]);
-//		glVertex3fv(lowerXYZ[j]);
-		j++;
-
-	      }
-	      endtfan();
-	    }
-	  break; /*exit the main loop*/
-	}
-      else if(j>= n_lower) /*case2: no more in lower*/
-	{
-	  if(i<n_upper-1) /*at least two vertices in upper*/
-	    {
-	      bgntfan();
-	      coord2f(leftMostV[0], leftMostV[1]);
-//	      glNormal3fv(leftMostNormal);
-//	      glVertex3fv(leftMostXYZ);
-        
-	      for(k=n_upper-1; k>=i; k--) /*reverse order for two-side lighting*/
-		{
-		  coord2f(upper_val[k], v_upper);
-//		  glNormal3fv(upperNormal[k]);
-//		  glVertex3fv(upperXYZ[k]);
-		}
-
-	      endtfan();
-	    }
-	  break; /*exit the main loop*/
-	}
-      else /* case3: neither is empty, plus the leftMostV, there is at least one triangle to output*/
-	{
-	  if(upper_val[i] <= lower_val[j])
-	    {
-	      bgntfan();
-	      coord2f(lower_val[j], v_lower);
-//	      glNormal3fv(lowerNormal[j]);
-//	      glVertex3fv(lowerXYZ[j]);
-
-	      /*find the last k>=i such that
-	       *upperverts[k][0] <= lowerverts[j][0]
-	       */
-	      k=i;
-
-	      while(k<n_upper)
-		{
-		  if(upper_val[k] > lower_val[j])
-		    break;
-		  k++;
-
-		}
-	      k--;
-
-
-	      for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
-		{
-		  coord2f(upper_val[l], v_upper);
-//		  glNormal3fv(upperNormal[l]);
-//		  glVertex3fv(upperXYZ[l]);
-
-		}
-	      coord2f(leftMostV[0], leftMostV[1]);
-//	      glNormal3fv(leftMostNormal);
-//	      glVertex3fv(leftMostXYZ);
-
-	      endtfan();
-
-	      /*update i and leftMostV for next loop
-	       */
-	      i = k+1;
-
-	      leftMostV[0] = upper_val[k];
-	      leftMostV[1] = v_upper;
-//	      leftMostNormal = upperNormal[k];
-//	      leftMostXYZ = upperXYZ[k];
-	    }
-	  else /*upperVerts[i][0] > lowerVerts[j][0]*/
-	    {
-	      bgntfan();
-	      coord2f(upper_val[i], v_upper);
-//	      glNormal3fv(upperNormal[i]);
-//	      glVertex3fv(upperXYZ[i]);
-        
-	      coord2f(leftMostV[0], leftMostV[1]);
-//		glNormal3fv(leftMostNormal);
-//	      glVertex3fv(leftMostXYZ);
-        
-
-	      /*find the last k>=j such that
-	       *lowerverts[k][0] < upperverts[i][0]
-	       */
-	      k=j;
-	      while(k< n_lower)
-		{
-		  if(lower_val[k] >= upper_val[i])
-		    break;
-		  coord2f(lower_val[k], v_lower);
-//		  glNormal3fv(lowerNormal[k]);
-//		  glVertex3fv(lowerXYZ[k]);
-
-		  k++;
-		}
-	      endtfan();
-
-	      /*update j and leftMostV for next loop
-	       */
-	      j=k;
-	      leftMostV[0] = lower_val[j-1];
-	      leftMostV[1] = v_lower;
-
-//	      leftMostNormal = lowerNormal[j-1];
-//	      leftMostXYZ = lowerXYZ[j-1];
-	    }
-	}
-    }
-  //clean up
-//  free(upperXYZ);
-//  free(lowerXYZ);
-//  free(upperNormal);
-//  free(lowerNormal);
-#endif
-
-}
-
-
-void
-OpenGLSurfaceEvaluator::evalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val)
-{
-#ifdef USE_INTERNAL_EVAL
-	inEvalVStrip(n_left, u_left, left_val,
-	n_right, u_right, right_val);
-#else
-
-#ifdef FOR_CHRIS
-	evalVStripExt(n_left, u_left, left_val,
-		      n_right, u_right, right_val);
-	return;
-
-#endif
-
-  int i,j,k,l;
-  REAL botMostV[2];
-  /*
-   *the algorithm works by scanning from bot to top.
-   *botMostV: the bot most of the remaining verteces (on both left and right).
-   *	       it could an element of leftVerts or rightVerts.
-   *i: leftVerts[i] is the first vertex to the top of botMostV on left line
-   *j: rightVerts[j] is the first vertex to the top of botMostV on rightline
-   */
-
-  /*initialize i,j,and botMostV
-   */
-  if(left_val[0] <= right_val[0])
-    {
-      i=1;
-      j=0;
-
-      botMostV[0] = u_left;
-      botMostV[1] = left_val[0];
-    }
-  else
-    {
-      i=0;
-      j=1;
-
-      botMostV[0] = u_right;
-      botMostV[1] = right_val[0];
-    }
-
-  /*the main loop.
-   *the invariance is that:
-   *at the beginning of each loop, the meaning of i,j,and botMostV are
-   *maintained
-   */
-  while(1)
-    {
-      if(i >= n_left) /*case1: no more in left*/
-	{
-	  if(j<n_right-1) /*at least two vertices in right*/
-	    {
-	      bgntfan();
-	      coord2f(botMostV[0], botMostV[1]);
-	      while(j<n_right){
-		coord2f(u_right, right_val[j]);
-//		glNormal3fv(rightNormal[j]);
-//		glVertex3fv(rightXYZ[j]);
-		j++;
-
-	      }
-	      endtfan();
-	    }
-	  break; /*exit the main loop*/
-	}
-      else if(j>= n_right) /*case2: no more in right*/
-	{
-	  if(i<n_left-1) /*at least two vertices in left*/
-	    {
-	      bgntfan();
-	      coord2f(botMostV[0], botMostV[1]);
-//	      glNormal3fv(botMostNormal);
-//	      glVertex3fv(botMostXYZ);
-        
-	      for(k=n_left-1; k>=i; k--) /*reverse order for two-side lighting*/
-		{
-		  coord2f(u_left, left_val[k]);
-//		  glNormal3fv(leftNormal[k]);
-//		  glVertex3fv(leftXYZ[k]);
-		}
-
-	      endtfan();
-	    }
-	  break; /*exit the main loop*/
-	}
-      else /* case3: neither is empty, plus the botMostV, there is at least one triangle to output*/
-	{
-	  if(left_val[i] <= right_val[j])
-	    {
-	      bgntfan();
-	      coord2f(u_right, right_val[j]);
-//	      glNormal3fv(rightNormal[j]);
-//	      glVertex3fv(rightXYZ[j]);
-
-	      /*find the last k>=i such that
-	       *leftverts[k][0] <= rightverts[j][0]
-	       */
-	      k=i;
-
-	      while(k<n_left)
-		{
-		  if(left_val[k] > right_val[j])
-		    break;
-		  k++;
-
-		}
-	      k--;
-
-
-	      for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
-		{
-		  coord2f(u_left, left_val[l]);
-//		  glNormal3fv(leftNormal[l]);
-//		  glVertex3fv(leftXYZ[l]);
-
-		}
-	      coord2f(botMostV[0], botMostV[1]);
-//	      glNormal3fv(botMostNormal);
-//	      glVertex3fv(botMostXYZ);
-
-	      endtfan();
-
-	      /*update i and botMostV for next loop
-	       */
-	      i = k+1;
-
-	      botMostV[0] = u_left;
-	      botMostV[1] = left_val[k];
-//	      botMostNormal = leftNormal[k];
-//	      botMostXYZ = leftXYZ[k];
-	    }
-	  else /*left_val[i] > right_val[j])*/
-	    {
-	      bgntfan();
-	      coord2f(u_left, left_val[i]);
-//	      glNormal3fv(leftNormal[i]);
-//	      glVertex3fv(leftXYZ[i]);
-        
-	      coord2f(botMostV[0], botMostV[1]);
-//	      glNormal3fv(botMostNormal);
-//	      glVertex3fv(botMostXYZ);
-        
-
-	      /*find the last k>=j such that
-	       *rightverts[k][0] < leftverts[i][0]
-	       */
-	      k=j;
-	      while(k< n_right)
-		{
-		  if(right_val[k] >= left_val[i])
-		    break;
-		  coord2f(u_right, right_val[k]);
-//		  glNormal3fv(rightNormal[k]);
-//		  glVertex3fv(rightXYZ[k]);
-
-		  k++;
-		}
-	      endtfan();
-
-	      /*update j and botMostV for next loop
-	       */
-	      j=k;
-	      botMostV[0] = u_right;
-	      botMostV[1] = right_val[j-1];
-
-//	      botMostNormal = rightNormal[j-1];
-//	      botMostXYZ = rightXYZ[j-1];
-	    }
-	}
-    }
-  //clean up
-//  free(leftXYZ);
-//  free(leftNormal);
-//  free(rightXYZ);
-//  free(rightNormal);
-#endif
-}
-
-
-void
-OpenGLSurfaceEvaluator::bgnqstrip(void)
-{
-  if(output_triangles)
-    bezierPatchMeshBeginStrip(global_bpm, GL_QUAD_STRIP);
-  else
-    glBegin((GLenum) GL_QUAD_STRIP);
-
-#ifdef STATISTICS
-	STAT_num_of_quad_strips++;
-#endif
-}
-
-void
-OpenGLSurfaceEvaluator::endqstrip(void)
-{
-  if(output_triangles)
-    bezierPatchMeshEndStrip(global_bpm);
-  else
-    glEnd();
-
-}
-
-/*-------------------------------------------------------------------------
- * bgnmap2f - preamble to surface definition and evaluations
- *-------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::bgnmap2f(long)
-{
-  if(output_triangles)
-    {
-      /*deallocate the space which may has been
-       *allocated by global_bpm previously
-       */
-      if(global_bpm != NULL) {
-	bezierPatchMeshListDelete(global_bpm);
-	global_bpm = NULL;
-      }
-
-
-      /*
-	auto_normal_flag = 1; //always output normal in callback mode.
-			      //we could have used the following code,
-			      //but Inspector doesn't have gl context
-			      //before it calls tessellator.
-			      //this way is temporary.
-	*/
-      //NEWCALLBACK
-      //if one of the two normal callback functions are set,
-      //then set
-      if(normalCallBackN != NULL ||
-	 normalCallBackData != NULL)
-	auto_normal_flag = 1;
-      else
-	auto_normal_flag = 0;
-
-      //initialize so that no maps initially
-      vertex_flag = 0;
-      normal_flag = 0;
-      color_flag = 0;
-      texcoord_flag = 0;
-
-      /*
-      if(glIsEnabled(GL_AUTO_NORMAL) == GL_TRUE)
-	auto_normal_flag = 1;
-      else if (callback_auto_normal == 1)
-	auto_normal_flag = 1;
-      else
-	auto_normal_flag = 0;
-	*/
-	  glPushAttrib((GLbitfield) GL_EVAL_BIT);
-
-    }
-  else
-    {
-      glPushAttrib((GLbitfield) GL_EVAL_BIT);
-
-      /*to avoid side effect, we restor the opengl state for GL_POLYGON_MODE
-       */       
-      glGetIntegerv(GL_POLYGON_MODE, gl_polygon_mode);
-    }
-
-}
-
-/*-------------------------------------------------------------------------
- * endmap2f - postamble to a map
- *-------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::endmap2f(void)
-{
-
-  if(output_triangles)
-    {
-      //bezierPatchMeshListDelDeg(global_bpm);
-
-      //    bezierPatchMeshListEval(global_bpm);
-
-      //surfcount++;
-      //printf("surfcount=%i\n", surfcount);
-      //if(surfcount == 8) exit(0);
-
-      inBPMListEvalEM(global_bpm);
-
-
-
-/*
-    global_bpm = bezierPatchMeshListReverse(global_bpm);
-    {
-      float *vertex_array;
-      float *normal_array;
-      int *length_array;
-      int *type_array;
-      int num_strips;
-      bezierPatchMeshListCollect(global_bpm, &vertex_array, &normal_array, &length_array, &type_array, &num_strips);
-      drawStrips(vertex_array, normal_array, length_array, type_array, num_strips);
-      free(vertex_array);
-      free(normal_array);
-      free(length_array);
-      free(type_array);
-    }
-*/
-
-    //bezierPatchMeshListPrint(global_bpm);
-    //bezierPatchMeshListDraw(global_bpm);
-
-//	  printf("num triangles=%i\n", bezierPatchMeshListNumTriangles(global_bpm));
-
-#ifdef USE_LOD
-#else
-    bezierPatchMeshListDelete(global_bpm);
-    global_bpm = NULL;
-#endif
-	glPopAttrib();
-  }
-else
-  {
-#ifndef USE_LOD
-    glPopAttrib();
-#endif
-
-#ifdef STATISTICS
-    fprintf(stderr, "num_vertices=%i,num_triangles=%i,num_quads_strips=%i\n", STAT_num_of_eval_vertices,STAT_num_of_triangles,STAT_num_of_quad_strips);
-#endif
-
-    /*to restore the gl_polygon_mode
-     */
-#ifndef USE_LOD
-    glPolygonMode( GL_FRONT, (GLenum) gl_polygon_mode[0]);
-    glPolygonMode( GL_BACK,  (GLenum) gl_polygon_mode[1]);
-#endif
-}
-
-}
-
-/*-------------------------------------------------------------------------
- * map2f - pass a desription of a surface map
- *-------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::map2f(
-    long _type,
-    REAL _ulower,	/* u lower domain coord 	*/
-    REAL _uupper,	/* u upper domain coord 	*/
-    long _ustride,	/* interpoint distance		*/
-    long _uorder,	/* parametric order		*/
-    REAL _vlower,	/* v lower domain coord 	*/
-    REAL _vupper,	/* v upper domain coord 	*/
-    long _vstride,	/* interpoint distance		*/
-    long _vorder,	/* parametric order		*/
-    REAL *pts)	/* control points		*/
-{
-#ifdef USE_INTERNAL_EVAL
-   inMap2f((int) _type, (REAL) _ulower, (REAL) _uupper,
-	    (int) _ustride, (int) _uorder, (REAL) _vlower,
-	    (REAL) _vupper, (int) _vstride, (int) _vorder,
-	    (REAL *) pts);
-#else
-
-
-
-   if(output_triangles)
-     {
-       if(global_bpm == NULL)
-	 global_bpm = bezierPatchMeshMake2(10,10);
-       if(
-	  (global_bpm->bpatch == NULL &&
-	  (_type == GL_MAP2_VERTEX_3 || _type == GL_MAP2_VERTEX_4))
-	  ||
-	  (global_bpm->bpatch_normal == NULL &&
-	   (_type == GL_MAP2_NORMAL))
-	  ||
-	  (global_bpm->bpatch_color == NULL &&
-	   (_type == GL_MAP2_INDEX || _type == GL_MAP2_COLOR_4))
-	  ||
-	  (global_bpm->bpatch_texcoord == NULL &&
-	   (_type == GL_MAP2_TEXTURE_COORD_1 ||
-	    _type == GL_MAP2_TEXTURE_COORD_2 ||
-	    _type == GL_MAP2_TEXTURE_COORD_3 ||
-	    _type == GL_MAP2_TEXTURE_COORD_4 )
-	   ))
-	 {
-	   bezierPatchMeshPutPatch(global_bpm, (int) _type, _ulower, _uupper,(int)  _ustride,(int) _uorder,_vlower, _vupper, (int) _vstride, (int) _vorder, pts);
-	 }
-       else /*new surface patch (with multiple maps) starts*/
-	 {
-	   bezierPatchMesh *temp = bezierPatchMeshMake2(10,10);
-	   bezierPatchMeshPutPatch(temp, (int) _type, _ulower, _uupper,(int)  _ustride,(int) _uorder,_vlower, _vupper, (int) _vstride, (int) _vorder, pts);
-	   global_bpm = bezierPatchMeshListInsert(global_bpm, temp);
-
-	   /*
-	   global_bpm = bezierPatchMeshListInsert(global_bpm,
-						  bezierPatchMeshMake(
-								      (int) _type, _ulower, _uupper,(int)  _ustride, (int) _uorder, _vlower, _vupper, (int) _vstride, (int) _vorder, pts, 10, 10));
-	   */
-	 }
-     }
-   else /*not output triangles*/
-     {
-       glMap2f((GLenum) _type, (GLfloat) _ulower, (GLfloat) _uupper,
-	       (GLint) _ustride, (GLint) _uorder, (GLfloat) _vlower,
-	       (GLfloat) _vupper, (GLint) _vstride, (GLint) _vorder,
-	       (const GLfloat *) pts);
-     }
-
-#endif
-}
-
-
-/*-------------------------------------------------------------------------
- * mapmesh2f - evaluate a mesh of points on lattice
- *-------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::mapmesh2f(long style, long umin, long umax, long vmin, long vmax)
-{
-#ifdef NO_EVALUATION
-return;
-#endif
-
-#ifdef USE_INTERNAL_EVAL
-    inEvalMesh2((int)umin, (int)vmin, (int)umax, (int)vmax);
-#else
-
-
-
-if(output_triangles)
-{
-#ifdef USE_LOD
-  bezierPatchMeshBeginStrip(global_bpm, GL_POLYGON);
-  bezierPatchMeshInsertUV(global_bpm, global_grid_u0, global_grid_v0);
-  bezierPatchMeshInsertUV(global_bpm, global_grid_u1, global_grid_v1);
-  bezierPatchMeshInsertUV(global_bpm, (REAL)global_grid_nu, (REAL)global_grid_nv);
-  bezierPatchMeshInsertUV(global_bpm, (REAL)umin, (REAL)vmin);
-  bezierPatchMeshInsertUV(global_bpm, (REAL)umax, (REAL)vmax);
-  bezierPatchMeshEndStrip(global_bpm);
-
-#else
-
-  REAL du, dv;
-  long i,j;
-  if(global_grid_nu == 0 || global_grid_nv == 0)
-    return; /*no points need to be output*/
-  du = (global_grid_u1 - global_grid_u0) / (REAL)global_grid_nu;
-  dv = (global_grid_v1 - global_grid_v0) / (REAL)global_grid_nv;
-
-  if(global_grid_nu >= global_grid_nv){
-
-    for(i=umin; i<umax; i++){
-      REAL u1 = (i==global_grid_nu)? global_grid_u1:(global_grid_u0 + i*du);
-      REAL u2 = ((i+1) == global_grid_nu)? global_grid_u1: (global_grid_u0+(i+1)*du);
-
-      bgnqstrip();
-      for(j=vmax; j>=vmin; j--){
-	REAL v1 = (j == global_grid_nv)? global_grid_v1: (global_grid_v0 +j*dv);
-        
-	coord2f(u1, v1);
-	coord2f(u2, v1);
-      }
-      endqstrip();
-    }
-  }
-  else{
-
-    for(i=vmin; i<vmax; i++){
-      REAL v1 = (i==global_grid_nv)? global_grid_v1:(global_grid_v0 + i*dv);
-      REAL v2 = ((i+1) == global_grid_nv)? global_grid_v1: (global_grid_v0+(i+1)*dv);
-
-      bgnqstrip();
-      for(j=umax; j>=umin; j--){
-	REAL u1 = (j == global_grid_nu)? global_grid_u1: (global_grid_u0 +j*du);        
-	coord2f(u1, v2);
-	coord2f(u1, v1);
-      }
-      endqstrip();
-    }
-  }
-#endif
-}
-else
-{
-    switch(style) {
-    default:
-    case N_MESHFILL:
-	glEvalMesh2((GLenum) GL_FILL, (GLint) umin, (GLint) umax,
-		(GLint) vmin, (GLint) vmax);
-	break;
-    case N_MESHLINE:
-	glEvalMesh2((GLenum) GL_LINE, (GLint) umin, (GLint) umax,
-		(GLint) vmin, (GLint) vmax);
-	break;
-    case N_MESHPOINT:
-	glEvalMesh2((GLenum) GL_POINT, (GLint) umin, (GLint) umax,
-		(GLint) vmin, (GLint) vmax);
-	break;
-    }
-  }
-
-#endif
-
-#ifdef STATISTICS
-	STAT_num_of_quad_strips += (umax-umin)*(vmax-vmin);
-#endif
-}
-
-/*-------------------------------------------------------------------------
- * evalcoord2f - evaluate a point on a surface
- *-------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::evalcoord2f(long, REAL u, REAL v)
-{
-
-
-#ifdef NO_EVALUATION
-return;
-#endif
-
-
-    newtmeshvert(u, v);
-}
-
-/*-------------------------------------------------------------------------
- * evalpoint2i - evaluate a grid point
- *-------------------------------------------------------------------------
- */
-void
-OpenGLSurfaceEvaluator::evalpoint2i(long u, long v)
-{
-#ifdef NO_EVALUATION
-return;
-#endif
-
-    newtmeshvert(u, v);
-}
-
-void
-OpenGLSurfaceEvaluator::point2i( long u, long v )
-{
-#ifdef NO_EVALUATION
-return;
-#else
-
-#ifdef USE_INTERNAL_EVAL
-    inEvalPoint2( (int)u,  (int)v);
-#else
-
-
-if(output_triangles)
-{
-
-  REAL du, dv;
-  REAL fu,fv;
-  du = (global_grid_u1 - global_grid_u0) / (REAL)global_grid_nu;
-  dv = (global_grid_v1 - global_grid_v0) / (REAL)global_grid_nv;
-  fu = (u==global_grid_nu)? global_grid_u1:(global_grid_u0 + u*du);
-  fv = (v == global_grid_nv)? global_grid_v1: (global_grid_v0 +v*dv);
-  coord2f(fu,fv);
-}
-else
-    glEvalPoint2((GLint) u, (GLint) v);
-
-
-#endif
-
-#ifdef STATISTICS
-  STAT_num_of_eval_vertices++;
-#endif
-
-#endif
-
-}
-
-void
-OpenGLSurfaceEvaluator::coord2f( REAL u, REAL v )
-{
-#ifdef NO_EVALUATION
-return;
-#else
-
-#ifdef USE_INTERNAL_EVAL
-    inEvalCoord2f( u, v);
-#else
-
-
-if(output_triangles)
-    bezierPatchMeshInsertUV(global_bpm, u,v);
-else
-    glEvalCoord2f((GLfloat) u, (GLfloat) v);
-
-
-#endif
-
-
-#ifdef STATISTICS
-  STAT_num_of_eval_vertices++;
-#endif
-
-#endif
-}
-
-void
-OpenGLSurfaceEvaluator::newtmeshvert( long u, long v )
-{
-#ifdef NO_EVALUATION
-return;
-#else
-
-    if (tmeshing) {
-
-	if (vcount == 2) {
-	    vertexCache[0]->invoke(this);
-	    vertexCache[1]->invoke(this);
-	    point2i( u,  v);
-
-	} else {
-	    vcount++;
-	}
-
-	vertexCache[which]->saveEvalPoint(u, v);
-	which = 1 - which;
-    } else {
-	point2i( u,  v);
-    }
-#endif
-}
-
-void
-OpenGLSurfaceEvaluator::newtmeshvert( REAL u, REAL v )
-{
-#ifdef NO_EVALUATION
-return;
-#else
-    if (tmeshing) {
-
-
-	if (vcount == 2) {
-	    vertexCache[0]->invoke(this);
-	    vertexCache[1]->invoke(this);
-	    coord2f(u,v);
-
-	} else {
-	    vcount++;
-	}
-
-	vertexCache[which]->saveEvalCoord(u, v);
-	which = 1 - which;
-    } else {
-
-	coord2f( u,  v);
-    }
-#endif
-
-}
-
-#ifdef _WIN32
-void OpenGLSurfaceEvaluator::putCallBack(GLenum which, void (GLAPIENTRY *fn)() )
-#else
-void OpenGLSurfaceEvaluator::putCallBack(GLenum which, _GLUfuncptr fn )
-#endif
-{
-  switch(which)
-    {
-    case GLU_NURBS_BEGIN:
-      beginCallBackN = (void (GLAPIENTRY *) (GLenum)) fn;
-      break;
-    case GLU_NURBS_END:
-      endCallBackN = (void (GLAPIENTRY *) (void)) fn;
-      break;
-    case GLU_NURBS_VERTEX:
-      vertexCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_NORMAL:
-      normalCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_COLOR:
-      colorCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_TEXTURE_COORD:
-      texcoordCallBackN = (void (GLAPIENTRY *) (const GLfloat*)) fn;
-      break;
-    case GLU_NURBS_BEGIN_DATA:
-      beginCallBackData = (void (GLAPIENTRY *) (GLenum, void*)) fn;
-      break;
-    case GLU_NURBS_END_DATA:
-      endCallBackData = (void (GLAPIENTRY *) (void*)) fn;
-      break;
-    case GLU_NURBS_VERTEX_DATA:
-      vertexCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-    case GLU_NURBS_NORMAL_DATA:
-      normalCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-    case GLU_NURBS_COLOR_DATA:
-      colorCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-    case GLU_NURBS_TEXTURE_COORD_DATA:
-      texcoordCallBackData = (void (GLAPIENTRY *) (const GLfloat*, void*)) fn;
-      break;
-
-    }
-}
-
-
-void
-OpenGLSurfaceEvaluator::beginCallBack(GLenum which, void *data)
-{
-  if(beginCallBackData)
-    beginCallBackData(which, data);
-  else if(beginCallBackN)
-    beginCallBackN(which);
-}
-
-void
-OpenGLSurfaceEvaluator::endCallBack(void *data)
-{
-  if(endCallBackData)
-    endCallBackData(data);
-  else if(endCallBackN)
-    endCallBackN();
-}
-
-void
-OpenGLSurfaceEvaluator::vertexCallBack(const GLfloat *vert, void* data)
-{
-  if(vertexCallBackData)
-    vertexCallBackData(vert, data);
-  else if(vertexCallBackN)
-    vertexCallBackN(vert);
-}
-
-
-void
-OpenGLSurfaceEvaluator::normalCallBack(const GLfloat *normal, void* data)
-{
-  if(normalCallBackData)
-    normalCallBackData(normal, data);
-  else if(normalCallBackN)
-    normalCallBackN(normal);
-}
-
-void
-OpenGLSurfaceEvaluator::colorCallBack(const GLfloat *color, void* data)
-{
-  if(colorCallBackData)
-    colorCallBackData(color, data);
-  else if(colorCallBackN)
-    colorCallBackN(color);
-}
-
-void
-OpenGLSurfaceEvaluator::texcoordCallBack(const GLfloat *texcoord, void* data)
-{
-  if(texcoordCallBackData)
-    texcoordCallBackData(texcoord, data);
-  else if(texcoordCallBackN)
-    texcoordCallBackN(texcoord);
-}
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/interface/glsurfeval.h b/src/glu/sgi/libnurbs/interface/glsurfeval.h
deleted file mode 100644
index 621e59391aa..00000000000
--- a/src/glu/sgi/libnurbs/interface/glsurfeval.h
+++ /dev/null
@@ -1,404 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * glsurfeval.h
- *
- */
-
-#ifndef __gluglsurfeval_h_
-#define __gluglsurfeval_h_
-
-#include "basicsurfeval.h"
-#include "bezierPatchMesh.h" //in case output triangles
-#include <GL/gl.h>
-#include <GL/glu.h>
-
-class SurfaceMap;
-class OpenGLSurfaceEvaluator;
-class StoredVertex;
-
-#define TYPECOORD	1
-#define TYPEPOINT	2
-
-/* Cache up to 3 vertices from tmeshes */
-#define VERTEX_CACHE_SIZE	3
-
-/*for internal evaluator callback stuff*/
-#ifndef IN_MAX_BEZIER_ORDER
-#define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
-#endif
-			
-#ifndef IN_MAX_DIMENSION
-#define IN_MAX_DIMENSION 4 
-#endif
-
-typedef struct surfEvalMachine{
-  REAL uprime;//cached previusly evaluated uprime.
-  REAL vprime;
-  int k; /*the dimension*/
-  REAL u1;
-  REAL u2;
-  int ustride;
-  int uorder;
-  REAL v1;
-  REAL v2;
-  int vstride;
-  int vorder;
-  REAL ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
-  REAL ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
-  REAL vcoeff[IN_MAX_BEZIER_ORDER];
-  REAL ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
-  REAL vcoeffDeriv[IN_MAX_BEZIER_ORDER];
-} surfEvalMachine;
-  
-  
-
-class StoredVertex {
-public:
-    		StoredVertex() { type = 0; coord[0] = 0; coord[1] = 0; point[0] = 0; point[1] = 0; }
-		~StoredVertex(void) {}
-    void	saveEvalCoord(REAL x, REAL y) 
-		    {coord[0] = x; coord[1] = y; type = TYPECOORD; }
-    void	saveEvalPoint(long x, long y)
-		    {point[0] = x; point[1] = y; type = TYPEPOINT; }
-    void	invoke(OpenGLSurfaceEvaluator *eval);
-
-private:
-    int		type;
-    REAL	coord[2];
-    long	point[2];
-};
-
-class OpenGLSurfaceEvaluator : public BasicSurfaceEvaluator {
-public:
-			OpenGLSurfaceEvaluator();
-    			virtual ~OpenGLSurfaceEvaluator( void );
-    void		polymode( long style );
-    void		range2f( long, REAL *, REAL * );
-    void		domain2f( REAL, REAL, REAL, REAL );
-    void		addMap( SurfaceMap * ) { }
-
-    void		enable( long );
-    void		disable( long );
-    void		bgnmap2f( long );
-    void		map2f( long, REAL, REAL, long, long, 
-				     REAL, REAL, long, long, REAL * );
-    void		mapgrid2f( long, REAL, REAL, long, REAL, REAL );
-    void		mapmesh2f( long, long, long, long, long );
-    void		evalcoord2f( long, REAL, REAL );
-    void		evalpoint2i( long, long );
-    void		endmap2f( void );
-
-    void	 	bgnline( void );
-    void	 	endline( void );
-    void	 	bgnclosedline( void );
-    void	 	endclosedline( void );
-    void	 	bgntmesh( void );
-    void	 	swaptmesh( void );
-    void	 	endtmesh( void );
-    void	 	bgnqstrip( void );
-    void	 	endqstrip( void );
-
-    void                bgntfan( void );
-    void                endtfan( void );
-    void                evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
-                                   int n_lower, REAL v_lower, REAL* lower_val);
-    void                evalVStrip(int n_left, REAL u_left, REAL* left_val,
-                                   int n_right, REAL u_right, REAL* right_val);
-
-    void		coord2f( REAL, REAL );
-    void		point2i( long, long );
-
-    void		newtmeshvert( REAL, REAL );
-    void		newtmeshvert( long, long );
-
-#ifdef _WIN32
-    void 	        putCallBack(GLenum which, void (GLAPIENTRY *fn)() );
-#else
-    void 	        putCallBack(GLenum which, _GLUfuncptr fn );
-#endif
-
-    int                 get_vertices_call_back()
-      {
-	return output_triangles;
-      }
-    void                put_vertices_call_back(int flag)
-      {
-	output_triangles = flag;
-      }
-
-    void                 put_callback_auto_normal(int flag)
-      {
-        callback_auto_normal = flag;
-      } 
-
-   int                   get_callback_auto_normal()
-     {
-        return callback_auto_normal;
-      }
-
-   void                  set_callback_userData(void* data)
-     {
-       userData = data;
-     }
-
-    /**************begin for LOD_eval_list***********/
-    void LOD_eval_list(int level);
-
-
-
-   
-private:
-    StoredVertex	*vertexCache[VERTEX_CACHE_SIZE];
-    int			tmeshing;
-    int			which;
-    int			vcount;
-
-    GLint              gl_polygon_mode[2];/*to save and restore so that
-					 *no side effect
-					 */
-    bezierPatchMesh        *global_bpm; //for output triangles
-    int                output_triangles; //true 1 or false 0
-
-
-
-    void (GLAPIENTRY *beginCallBackN) (GLenum type);
-    void (GLAPIENTRY *endCallBackN)   (void);
-    void (GLAPIENTRY *vertexCallBackN) (const GLfloat *vert);
-    void (GLAPIENTRY *normalCallBackN) (const GLfloat *normal);
-    void (GLAPIENTRY *colorCallBackN) (const GLfloat *color);
-    void (GLAPIENTRY *texcoordCallBackN) (const GLfloat *texcoord);
-
-    void (GLAPIENTRY *beginCallBackData) (GLenum type, void* data);
-    void (GLAPIENTRY *endCallBackData)   (void* data);
-    void (GLAPIENTRY *vertexCallBackData) (const GLfloat *vert, void* data);
-    void (GLAPIENTRY *normalCallBackData) (const GLfloat *normal, void* data);
-    void (GLAPIENTRY *colorCallBackData) (const GLfloat *color, void* data);
-    void (GLAPIENTRY *texcoordCallBackData) (const GLfloat *texcoord, void* data);
-
-    void               beginCallBack (GLenum type, void* data);
-    void               endCallBack   (void* data);
-    void               vertexCallBack (const GLfloat *vert, void* data);
-    void               normalCallBack (const GLfloat *normal, void* data);
-    void               colorCallBack (const GLfloat *color, void* data);
-    void               texcoordCallBack (const GLfloat *texcoord, void* data);
-
-
-    void* userData; //the opaque pointer for Data callback functions.
-
-   /*LOD evaluation*/
-   void LOD_triangle(REAL A[2], REAL B[2], REAL C[2],
-		     int level);
-   void LOD_eval(int num_vert, REAL* verts, int type, int level);
-		     
-  int LOD_eval_level; //set by LOD_eval_list()
-
-   /*************begin for internal evaluators*****************/
-			
- /*the following global variables are only defined in this file. 
- *They are used to cache the precomputed Bezier polynomial values.
- *These calues may be used consecutively in which case we don't have 
- *recompute these values again.
- */
- int global_uorder; /*store the uorder in the previous evaluation*/
- int global_vorder; /*store the vorder in the previous evaluation*/
- REAL global_uprime;
- REAL global_vprime;
- REAL global_vprime_BV;
- REAL global_uprime_BU;
- int global_uorder_BV; /*store the uorder in the previous evaluation*/
- int global_vorder_BV; /*store the vorder in the previous evaluation*/
- int global_uorder_BU; /*store the uorder in the previous evaluation*/
- int global_vorder_BU; /*store the vorder in the previous evaluation*/
-
- REAL global_ucoeff[IN_MAX_BEZIER_ORDER]; /*cache the polynomial values*/
- REAL global_vcoeff[IN_MAX_BEZIER_ORDER];
- REAL global_ucoeffDeriv[IN_MAX_BEZIER_ORDER]; /*cache the polynomial derivatives*/
- REAL global_vcoeffDeriv[IN_MAX_BEZIER_ORDER];
-
- REAL global_BV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
- REAL global_PBV[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
- REAL global_BU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
- REAL global_PBU[IN_MAX_BEZIER_ORDER][IN_MAX_DIMENSION];
- REAL* global_baseData;
-
- int    global_ev_k; /*the dimension*/
- REAL global_ev_u1;
- REAL global_ev_u2;
- int    global_ev_ustride;
- int    global_ev_uorder;
- REAL global_ev_v1;
- REAL global_ev_v2;
- int    global_ev_vstride;
- int    global_ev_vorder;
- REAL global_ev_ctlPoints[IN_MAX_BEZIER_ORDER*IN_MAX_BEZIER_ORDER*IN_MAX_DIMENSION];
-
- REAL  global_grid_u0;
- REAL  global_grid_u1;
- int     global_grid_nu;
- REAL  global_grid_v0;
- REAL  global_grid_v1;
- int     global_grid_nv;
-
-/*functions*/
- void inDoDomain2WithDerivs(int k, REAL u, REAL v, 
-				REAL u1, REAL u2, int uorder, 
-				REAL v1,  REAL v2, int vorder, 
-				REAL *baseData,
-				REAL *retPoint, REAL *retdu, REAL *retdv);
- void inPreEvaluate(int order, REAL vprime, REAL *coeff);
- void inPreEvaluateWithDeriv(int order, REAL vprime, REAL *coeff, REAL *coeffDeriv);
- void inComputeFirstPartials(REAL *p, REAL *pu, REAL *pv);
- void inComputeNormal2(REAL *pu, REAL *pv, REAL *n);
- void inDoEvalCoord2(REAL u, REAL v,
-		     REAL *retPoint, REAL *retNormal);
- void inDoEvalCoord2NOGE(REAL u, REAL v,
-		     REAL *retPoint, REAL *retNormal);
- void inMap2f(int k,
-	      REAL ulower,
-	      REAL uupper,
-	      int ustride,
-	      int uorder,
-	      REAL vlower,
-	      REAL vupper,
-	      int vstride,
-	      int vorder,
-	      REAL *ctlPoints);
-
- void inMapGrid2f(int nu, REAL u0, REAL u1, 
-		  int nv, REAL v0, REAL v1);
-
- void inEvalMesh2(int lowU, int lowV, int highU, int highV);
- void inEvalPoint2(int i, int j);
- void inEvalCoord2f(REAL u, REAL v);
-
-void inEvalULine(int n_points, REAL v, REAL* u_vals, 
-	int stride, REAL ret_points[][3], REAL ret_normals[][3]);
-
-void inEvalVLine(int n_points, REAL u, REAL* v_vals, 
-	int stride, REAL ret_points[][3], REAL ret_normals[][3]);
-
-void inEvalUStrip(int n_upper, REAL v_upper, REAL* upper_val, 
-                       int n_lower, REAL v_lower, REAL* lower_val
-                       );
-void inEvalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val);
-
-void inPreEvaluateBV(int k, int uorder, int vorder, REAL vprime, REAL *baseData);
-void inPreEvaluateBU(int k, int uorder, int vorder, REAL uprime, REAL *baseData);
-void inPreEvaluateBV_intfac(REAL v )
-  {
-   inPreEvaluateBV(global_ev_k, global_ev_uorder, global_ev_vorder, (v-global_ev_v1)/(global_ev_v2-global_ev_v1), global_ev_ctlPoints);
-  }
-
-void inPreEvaluateBU_intfac(REAL u)
-  {
-    inPreEvaluateBU(global_ev_k, global_ev_uorder, global_ev_vorder, (u-global_ev_u1)/(global_ev_u2-global_ev_u1), global_ev_ctlPoints); 
-  }
-
-void inDoDomain2WithDerivsBV(int k, REAL u, REAL v,
-			     REAL u1, REAL u2, int uorder,
-			     REAL v1, REAL v2, int vorder,
-			     REAL *baseData,
-			     REAL *retPoint, REAL* retdu, REAL *retdv);
-
-void inDoDomain2WithDerivsBU(int k, REAL u, REAL v,
-			     REAL u1, REAL u2, int uorder,
-			     REAL v1, REAL v2, int vorder,
-			     REAL *baseData,
-			     REAL *retPoint, REAL* retdu, REAL *retdv);
-
-
-void inDoEvalCoord2NOGE_BV(REAL u, REAL v,
-			   REAL *retPoint, REAL *retNormal);
-
-void inDoEvalCoord2NOGE_BU(REAL u, REAL v,
-			   REAL *retPoint, REAL *retNormal);
-
-void inBPMEval(bezierPatchMesh* bpm);
-void inBPMListEval(bezierPatchMesh* list);
-
-/*-------------begin for surfEvalMachine -------------*/
-surfEvalMachine em_vertex;
-surfEvalMachine em_normal;
-surfEvalMachine em_color;
-surfEvalMachine em_texcoord;
-
-int auto_normal_flag; //whether to output normla or not in callback
-                      //determined by GL_AUTO_NORMAL and callback_auto_normal
-int callback_auto_normal; //GLU_CALLBACK_AUTO_NORMAL_EXT
-int vertex_flag;
-int normal_flag;
-int color_flag;
-int texcoord_flag;
-
-void inMap2fEM(int which, //0:vert,1:norm,2:color,3:tex
-	       int dimension,
-	      REAL ulower,
-	      REAL uupper,
-	      int ustride,
-	      int uorder,
-	      REAL vlower,
-	      REAL vupper,
-	      int vstride,
-	      int vorder,
-	      REAL *ctlPoints);
-
-void inDoDomain2WithDerivsEM(surfEvalMachine *em, REAL u, REAL v, 
-				REAL *retPoint, REAL *retdu, REAL *retdv);
-void inDoDomain2EM(surfEvalMachine *em, REAL u, REAL v, 
-				REAL *retPoint);
- void inDoEvalCoord2EM(REAL u, REAL v);
-
-void inBPMEvalEM(bezierPatchMesh* bpm);
-void inBPMListEvalEM(bezierPatchMesh* list);
-
-/*-------------end for surfEvalMachine -------------*/
-
-
-   /*************end for internal evaluators*****************/
-		       
-};
-
-inline void StoredVertex::invoke(OpenGLSurfaceEvaluator *eval)
-{
-    switch(type) {
-      case TYPECOORD:
-	eval->coord2f(coord[0], coord[1]);
-	break;
-      case TYPEPOINT:
-	eval->point2i(point[0], point[1]);
-	break;
-      default:
-	break;
-    }
-}
-
-#endif /* __gluglsurfeval_h_ */
diff --git a/src/glu/sgi/libnurbs/interface/incurveeval.cc b/src/glu/sgi/libnurbs/interface/incurveeval.cc
deleted file mode 100644
index 96ea8896ae7..00000000000
--- a/src/glu/sgi/libnurbs/interface/incurveeval.cc
+++ /dev/null
@@ -1,206 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-
-#include "glcurveval.h"
-
-
-/*
- *compute the Bezier polynomials C[n,j](v) for all j at v with 
- *return values stored in coeff[], where 
- *  C[n,j](v) = (n,j) * v^j * (1-v)^(n-j),
- *  j=0,1,2,...,n.
- *order : n+1
- *vprime: v
- *coeff : coeff[j]=C[n,j](v), this array store the returned values.
- *The algorithm is a recursive scheme:
- *   C[0,0]=1;
- *   C[n,j](v) = (1-v)*C[n-1,j](v) + v*C[n-1,j-1](v), n>=1
- *This code is copied from opengl/soft/so_eval.c:PreEvaluate
- */
-void OpenGLCurveEvaluator::inPreEvaluate(int order, REAL vprime, REAL *coeff)
-{
-  int i, j;
-  REAL oldval, temp;
-  REAL oneMinusvprime;
-  
-  /*
-   * Minor optimization
-   * Compute orders 1 and 2 outright, and set coeff[0], coeff[1] to
-     * their i==1 loop values to avoid the initialization and the i==1 loop.
-     */
-  if (order == 1) {
-    coeff[0] = 1.0;
-    return;
-  }
-  
-  oneMinusvprime = 1-vprime;
-  coeff[0] = oneMinusvprime;
-  coeff[1] = vprime;
-  if (order == 2) return;
-  
-  for (i = 2; i < order; i++) {
-    oldval = coeff[0] * vprime;
-    coeff[0] = oneMinusvprime * coeff[0];
-    for (j = 1; j < i; j++) {
-      temp = oldval;
-      oldval = coeff[j] * vprime;
-	    coeff[j] = temp + oneMinusvprime * coeff[j];
-    }
-    coeff[j] = oldval;
-  }
-}
-
-void OpenGLCurveEvaluator::inMap1f(int which, //0: vert, 1: norm, 2: color, 3: tex
-				   int k, //dimension
-				   REAL ulower,
-				   REAL uupper,
-				   int ustride,
-				   int uorder,
-				   REAL *ctlpoints)
-{
-  int i,x;
-  curveEvalMachine *temp_em;
-  switch(which){
-  case 0: //vertex
-    vertex_flag = 1;
-    temp_em = &em_vertex;
-    break;
-  case 1: //normal
-    normal_flag = 1;
-    temp_em = &em_normal;
-    break;
-  case 2: //color
-    color_flag = 1;
-    temp_em = &em_color;
-    break;
-  default:
-    texcoord_flag = 1;
-    temp_em = &em_texcoord;
-    break;
-  }
-  
-  REAL *data = temp_em->ctlpoints;
-  temp_em->uprime = -1; //initialized
-  temp_em->k = k;
-  temp_em->u1 = ulower;
-  temp_em->u2 = uupper;
-  temp_em->ustride = ustride;
-  temp_em->uorder = uorder;
-  /*copy the control points*/
-  for(i=0; i<uorder; i++){
-    for(x=0; x<k; x++){
-      data[x] = ctlpoints[x];
-    }
-    ctlpoints += ustride;
-    data += k;
-  }     
-}
-
-void OpenGLCurveEvaluator::inDoDomain1(curveEvalMachine *em, REAL u, REAL *retPoint)
-{
-  int j, row;
-  REAL the_uprime;
-  REAL *data;
-  
-  if(em->u2 == em->u1)
-    return;
-  the_uprime = (u-em->u1) / (em->u2-em->u1);
-  /*use already cached values if possible*/
-  if(em->uprime != the_uprime){
-    inPreEvaluate(em->uorder, the_uprime, em->ucoeff);
-    em->uprime = the_uprime;
-  }
-  
-  for(j=0; j<em->k; j++){
-    data = em->ctlpoints+j;
-    retPoint[j] = 0.0;
-    for(row=0; row<em->uorder; row++)
-      {
-	retPoint[j] += em->ucoeff[row] * (*data);
-	data += em->k;
-      }
-  } 
-}
-
-void  OpenGLCurveEvaluator::inDoEvalCoord1(REAL u)
-{
-  REAL temp_vertex[4];
-  REAL temp_normal[3];
-  REAL temp_color[4];
-  REAL temp_texcoord[4];
-  if(texcoord_flag) //there is a texture map
-    {
-      inDoDomain1(&em_texcoord, u, temp_texcoord);
-      texcoordCallBack(temp_texcoord, userData);
-    }
-#ifdef DEBUG
-printf("color_flag = %i\n", color_flag);
-#endif
-  if(color_flag) //there is a color map
-    {
-      inDoDomain1(&em_color, u, temp_color);
-      colorCallBack(temp_color, userData);
-    }
-  if(normal_flag) //there is a normal map
-    {
-      inDoDomain1(&em_normal, u, temp_normal);
-      normalCallBack(temp_normal, userData);
-    }
-  if(vertex_flag)
-    {
-      inDoDomain1(&em_vertex, u, temp_vertex);
-      vertexCallBack(temp_vertex, userData);
-    }
-}
-
-void OpenGLCurveEvaluator::inMapMesh1f(int umin, int umax)
-{
-  REAL du, u;
-  int i;
-  if(global_grid_nu == 0)
-    return; //no points to output
-  du = (global_grid_u1 - global_grid_u0) / (REAL) global_grid_nu;
-  bgnline();
-  for(i=umin; i<= umax; i++){
-    u = (i==global_grid_nu)? global_grid_u1: global_grid_u0 + i*du;
-    inDoEvalCoord1(u);
-  }
-  endline();
-}
diff --git a/src/glu/sgi/libnurbs/interface/insurfeval.cc b/src/glu/sgi/libnurbs/interface/insurfeval.cc
deleted file mode 100644
index 9d0c82a91c0..00000000000
--- a/src/glu/sgi/libnurbs/interface/insurfeval.cc
+++ /dev/null
@@ -1,2064 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <GL/gl.h>
-#include <math.h>
-#include <assert.h>
-
-#include "glsurfeval.h"
-
-//extern int surfcount;
-
-//#define CRACK_TEST
-
-#define AVOID_ZERO_NORMAL
-
-#ifdef AVOID_ZERO_NORMAL
-#define myabs(x)  ((x>0)? x: (-x))
-#define MYZERO 0.000001
-#define MYDELTA 0.001
-#endif
-
-//#define USE_LOD
-#ifdef USE_LOD
-//#define LOD_EVAL_COORD(u,v) inDoEvalCoord2EM(u,v)
-#define LOD_EVAL_COORD(u,v) glEvalCoord2f(u,v)
-
-static void LOD_interpolate(REAL A[2], REAL B[2], REAL C[2], int j, int k, int pow2_level,
-			    REAL& u, REAL& v)
-{
-  REAL a,a1,b,b1;
-
-  a = ((REAL) j) / ((REAL) pow2_level);
-  a1 = 1-a;
-
-  if(j != 0)
-    {
-      b = ((REAL) k) / ((REAL)j);
-      b1 = 1-b;
-    }
-  REAL x,y,z;
-  x = a1;
-  if(j==0)
-    {
-      y=0; z=0;
-    }
-  else{
-    y = b1*a;
-    z = b *a;
-  }
-
-  u = x*A[0] + y*B[0] + z*C[0];
-  v = x*A[1] + y*B[1] + z*C[1];
-}
-
-void OpenGLSurfaceEvaluator::LOD_triangle(REAL A[2], REAL B[2], REAL C[2], 
-			 int level)     
-{
-  int k,j;
-  int pow2_level;
-  /*compute 2^level*/
-  pow2_level = 1;
-
-  for(j=0; j<level; j++)
-    pow2_level *= 2;
-  for(j=0; j<=pow2_level-1; j++)
-    {
-      REAL u,v;
-
-/*      beginCallBack(GL_TRIANGLE_STRIP);*/
-glBegin(GL_TRIANGLE_STRIP);
-      LOD_interpolate(A,B,C, j+1, j+1, pow2_level, u,v);
-#ifdef USE_LOD
-      LOD_EVAL_COORD(u,v);
-//      glEvalCoord2f(u,v);
-#else
-      inDoEvalCoord2EM(u,v);
-#endif
-
-      for(k=0; k<=j; k++)
-	{
-	  LOD_interpolate(A,B,C,j,j-k,pow2_level, u,v);
-#ifdef USE_LOD
-          LOD_EVAL_COORD(u,v);
-//	  glEvalCoord2f(u,v);
-#else
-	  inDoEvalCoord2EM(u,v);
-#endif
-
-	  LOD_interpolate(A,B,C,j+1,j-k,pow2_level, u,v);
-
-#ifdef USE_LOD
-	  LOD_EVAL_COORD(u,v);
-//	  glEvalCoord2f(u,v);
-#else
-	  inDoEvalCoord2EM(u,v);
-#endif
-	}
-//      endCallBack();	
-glEnd();
-    }
-}
-
-void OpenGLSurfaceEvaluator::LOD_eval(int num_vert, REAL* verts, int type,
-		     int level
-		     )
-{
-  int i,k;
-  switch(type){
-  case GL_TRIANGLE_STRIP:
-  case GL_QUAD_STRIP:
-    for(i=2, k=4; i<=num_vert-2; i+=2, k+=4)
-      {
-	LOD_triangle(verts+k-4, verts+k-2, verts+k,
-		     level
-		     );
-	LOD_triangle(verts+k-2, verts+k+2, verts+k,
-		     level
-		     );
-      }
-    if(num_vert % 2 ==1) 
-      {
-	LOD_triangle(verts+2*(num_vert-3), verts+2*(num_vert-2), verts+2*(num_vert-1),
-		     level
-		     );
-      }
-    break;      
-  case GL_TRIANGLE_FAN:
-    for(i=1, k=2; i<=num_vert-2; i++, k+=2)
-      {
-	LOD_triangle(verts,verts+k, verts+k+2,
-		     level
-		     );
-      }
-    break;
-  
-  default:
-    fprintf(stderr, "typy not supported in LOD_\n");
-  }
-}
-	
-
-#endif //USE_LOD
-
-//#define  GENERIC_TEST
-#ifdef GENERIC_TEST
-extern float xmin, xmax, ymin, ymax, zmin, zmax; /*bounding box*/
-extern int temp_signal;
-
-static void gTessVertexSphere(float u, float v, float temp_normal[3], float temp_vertex[3])
-{
-  float r=2.0;
-  float Ox = 0.5*(xmin+xmax);
-  float Oy = 0.5*(ymin+ymax);
-  float Oz = 0.5*(zmin+zmax);
-  float nx = cos(v) * sin(u);
-  float ny = sin(v) * sin(u);
-  float nz = cos(u);
-  float x= Ox+r * nx;
-  float y= Oy+r * ny;
-  float z= Oz+r * nz;
-
-  temp_normal[0] = nx;
-  temp_normal[1] = ny;
-  temp_normal[2] =  nz;
-  temp_vertex[0] = x;
-  temp_vertex[1] = y;
-  temp_vertex[2] = z;
-
-//  glNormal3f(nx,ny,nz);
-//  glVertex3f(x,y,z);
-}
-
-static void gTessVertexCyl(float u, float v, float temp_normal[3], float temp_vertex[3])
-{
-   float r=2.0;
-  float Ox = 0.5*(xmin+xmax);
-  float Oy = 0.5*(ymin+ymax);
-  float Oz = 0.5*(zmin+zmax);
-  float nx = cos(v);
-  float ny = sin(v);
-  float nz = 0;
-  float x= Ox+r * nx;
-  float y= Oy+r * ny;
-  float z= Oz - 2*u;
-
-  temp_normal[0] = nx;
-  temp_normal[1] = ny;
-  temp_normal[2] =  nz;
-  temp_vertex[0] = x;
-  temp_vertex[1] = y;
-  temp_vertex[2] = z;
-
-/*  
-  glNormal3f(nx,ny,nz);
-  glVertex3f(x,y,z);
-*/
-}
-
-#endif //GENERIC_TEST
-
-void OpenGLSurfaceEvaluator::inBPMListEval(bezierPatchMesh* list)
-{
-  bezierPatchMesh* temp;
-  for(temp = list; temp != NULL; temp = temp->next)
-    {
-      inBPMEval(temp);
-    }
-}
-
-void OpenGLSurfaceEvaluator::inBPMEval(bezierPatchMesh* bpm)
-{
-  int i,j,k,l;
-  float u,v;
-
-  int ustride = bpm->bpatch->dimension * bpm->bpatch->vorder;
-  int vstride = bpm->bpatch->dimension;
-  inMap2f( 
-	  (bpm->bpatch->dimension == 3)? GL_MAP2_VERTEX_3 : GL_MAP2_VERTEX_4,
-	  bpm->bpatch->umin,
-	  bpm->bpatch->umax,
-	  ustride,
-	  bpm->bpatch->uorder,
-	  bpm->bpatch->vmin,
-	  bpm->bpatch->vmax,
-	  vstride,
-	  bpm->bpatch->vorder,
-	  bpm->bpatch->ctlpoints);
-  
-  bpm->vertex_array = (float*) malloc(sizeof(float)* (bpm->index_UVarray/2) * 3+1); /*in case the origional dimenion is 4, then we need 4 space to pass to evaluator.*/
-  assert(bpm->vertex_array);
-  bpm->normal_array = (float*) malloc(sizeof(float)* (bpm->index_UVarray/2) * 3);
-  assert(bpm->normal_array);
-#ifdef CRACK_TEST
-if(  global_ev_u1 ==2 &&   global_ev_u2 == 3
-  && global_ev_v1 ==2 &&   global_ev_v2 == 3)
-{
-REAL vertex[4];
-REAL normal[4];
-#ifdef DEBUG
-printf("***number 1\n");
-#endif
-
-beginCallBack(GL_QUAD_STRIP, NULL);
-inEvalCoord2f(3.0, 3.0);
-inEvalCoord2f(2.0, 3.0);
-inEvalCoord2f(3.0, 2.7);
-inEvalCoord2f(2.0, 2.7);
-inEvalCoord2f(3.0, 2.0);
-inEvalCoord2f(2.0, 2.0);
-endCallBack(NULL);
-
-
-beginCallBack(GL_TRIANGLE_STRIP, NULL);
-inEvalCoord2f(2.0, 3.0);
-inEvalCoord2f(2.0, 2.0);
-inEvalCoord2f(2.0, 2.7);
-endCallBack(NULL);
-
-}
-
-/*
-if(  global_ev_u1 ==2 &&   global_ev_u2 == 3
-  && global_ev_v1 ==1 &&   global_ev_v2 == 2)
-{
-#ifdef DEBUG
-printf("***number 2\n");
-#endif
-beginCallBack(GL_QUAD_STRIP);
-inEvalCoord2f(2.0, 2.0);
-inEvalCoord2f(2.0, 1.0);
-inEvalCoord2f(3.0, 2.0);
-inEvalCoord2f(3.0, 1.0);
-endCallBack();
-}
-*/
-if(  global_ev_u1 ==1 &&   global_ev_u2 == 2
-  && global_ev_v1 ==2 &&   global_ev_v2 == 3)
-{
-#ifdef DEBUG
-printf("***number 3\n");
-#endif
-beginCallBack(GL_QUAD_STRIP, NULL);
-inEvalCoord2f(2.0, 3.0);
-inEvalCoord2f(1.0, 3.0);
-inEvalCoord2f(2.0, 2.3);
-inEvalCoord2f(1.0, 2.3);
-inEvalCoord2f(2.0, 2.0);
-inEvalCoord2f(1.0, 2.0);
-endCallBack(NULL);
-
-beginCallBack(GL_TRIANGLE_STRIP, NULL);
-inEvalCoord2f(2.0, 2.3);
-inEvalCoord2f(2.0, 2.0);
-inEvalCoord2f(2.0, 3.0);
-endCallBack(NULL);
-
-}
-return;
-#endif
-
-  k=0;
-  l=0;
-
-  for(i=0; i<bpm->index_length_array; i++)
-    {
-      beginCallBack(bpm->type_array[i], userData);
-      for(j=0; j<bpm->length_array[i]; j++)
-	{
-	  u = bpm->UVarray[k];
-	  v = bpm->UVarray[k+1];
-	  inDoEvalCoord2NOGE(u,v,
-			     bpm->vertex_array+l,
-			     bpm->normal_array+l);
-
-	  normalCallBack(bpm->normal_array+l, userData);
-	  vertexCallBack(bpm->vertex_array+l, userData);
-
-	  k += 2;
-	  l += 3;
-	}
-      endCallBack(userData);
-    }
-}
-
-void OpenGLSurfaceEvaluator::inEvalPoint2(int i, int j)
-{
-  REAL du, dv;
-  REAL point[4];
-  REAL normal[3];
-  REAL u,v;
-  du = (global_grid_u1 - global_grid_u0) / (REAL)global_grid_nu;
-  dv = (global_grid_v1 - global_grid_v0) / (REAL)global_grid_nv;
-  u = (i==global_grid_nu)? global_grid_u1:(global_grid_u0 + i*du);
-  v = (j == global_grid_nv)? global_grid_v1: (global_grid_v0 +j*dv);
-  inDoEvalCoord2(u,v,point,normal);
-}
-
-void OpenGLSurfaceEvaluator::inEvalCoord2f(REAL u, REAL v)
-{
-
-  REAL point[4];
-  REAL normal[3];
-  inDoEvalCoord2(u,v,point, normal);
-}
-
-
-
-/*define a grid. store the values into the global variabls:
- * global_grid_*
- *These values will be used later by evaluating functions
- */
-void OpenGLSurfaceEvaluator::inMapGrid2f(int nu, REAL u0, REAL u1,
-		 int nv, REAL v0, REAL v1)
-{
- global_grid_u0 = u0;
- global_grid_u1 = u1;
- global_grid_nu = nu;
- global_grid_v0 = v0;
- global_grid_v1 = v1;
- global_grid_nv = nv;
-}
-
-void OpenGLSurfaceEvaluator::inEvalMesh2(int lowU, int lowV, int highU, int highV)
-{
-  REAL du, dv;
-  int i,j;
-  REAL point[4];
-  REAL normal[3];
-  if(global_grid_nu == 0 || global_grid_nv == 0)
-    return; /*no points need to be output*/
-  du = (global_grid_u1 - global_grid_u0) / (REAL)global_grid_nu;
-  dv = (global_grid_v1 - global_grid_v0) / (REAL)global_grid_nv;  
-  
-  if(global_grid_nu >= global_grid_nv){
-    for(i=lowU; i<highU; i++){
-      REAL u1 = (i==global_grid_nu)? global_grid_u1:(global_grid_u0 + i*du);
-      REAL u2 = ((i+1) == global_grid_nu)? global_grid_u1: (global_grid_u0+(i+1)*du);
-      
-      bgnqstrip();
-      for(j=highV; j>=lowV; j--){
-	REAL v1 = (j == global_grid_nv)? global_grid_v1: (global_grid_v0 +j*dv);
-	
-	inDoEvalCoord2(u1, v1, point, normal);
-	inDoEvalCoord2(u2, v1, point, normal);
-      }
-      endqstrip();
-    }
-  }
-  
-  else{
-    for(i=lowV; i<highV; i++){
-      REAL v1 = (i==global_grid_nv)? global_grid_v1:(global_grid_v0 + i*dv);
-      REAL v2 = ((i+1) == global_grid_nv)? global_grid_v1: (global_grid_v0+(i+1)*dv);
-      
-      bgnqstrip();
-      for(j=highU; j>=lowU; j--){
-	REAL u1 = (j == global_grid_nu)? global_grid_u1: (global_grid_u0 +j*du);	
-	inDoEvalCoord2(u1, v2, point, normal);
-	inDoEvalCoord2(u1, v1, point, normal);
-      }
-      endqstrip();
-    }
-  }
-    
-}
-
-void OpenGLSurfaceEvaluator::inMap2f(int k,
-	     REAL ulower,
-	     REAL uupper,
-	     int ustride,
-	     int uorder,
-	     REAL vlower,
-	     REAL vupper,
-	     int vstride,
-	     int vorder,
-	     REAL *ctlPoints)
-{
-  int i,j,x;
-  REAL *data = global_ev_ctlPoints;
-  
-
-
-  if(k == GL_MAP2_VERTEX_3) k=3;
-  else if (k==GL_MAP2_VERTEX_4) k =4;
-  else {
-    printf("error in inMap2f, maptype=%i is wrong, k,map is not updated\n", k);
-    return;
-  }
-  
-  global_ev_k = k;
-  global_ev_u1 = ulower;
-  global_ev_u2 = uupper;
-  global_ev_ustride = ustride;
-  global_ev_uorder = uorder;
-  global_ev_v1 = vlower;
-  global_ev_v2 = vupper;
-  global_ev_vstride = vstride;
-  global_ev_vorder = vorder;
-
-  /*copy the contrl points from ctlPoints to global_ev_ctlPoints*/
-  for (i=0; i<uorder; i++) {
-    for (j=0; j<vorder; j++) {
-      for (x=0; x<k; x++) {
-	data[x] = ctlPoints[x];
-      }
-      ctlPoints += vstride;
-      data += k;
-    }
-    ctlPoints += ustride - vstride * vorder;
-  }
-
-}
-
-
-/*
- *given a point p with homegeneous coordiante (x,y,z,w), 
- *let pu(x,y,z,w) be its partial derivative vector with
- *respect to u
- *and pv(x,y,z,w) be its partial derivative vector with repect to v.
- *This function returns the partial derivative vectors of the
- *inhomegensous coordinates, i.e., 
- * (x/w, y/w, z/w) with respect to u and v.
- */
-void OpenGLSurfaceEvaluator::inComputeFirstPartials(REAL *p, REAL *pu, REAL *pv)
-{
-    pu[0] = pu[0]*p[3] - pu[3]*p[0];
-    pu[1] = pu[1]*p[3] - pu[3]*p[1];
-    pu[2] = pu[2]*p[3] - pu[3]*p[2];
-
-    pv[0] = pv[0]*p[3] - pv[3]*p[0];
-    pv[1] = pv[1]*p[3] - pv[3]*p[1];
-    pv[2] = pv[2]*p[3] - pv[3]*p[2];
-}
-
-/*compute the cross product of pu and pv and normalize.
- *the normal is returned in retNormal
- * pu: dimension 3
- * pv: dimension 3
- * n: return normal, of dimension 3
- */
-void OpenGLSurfaceEvaluator::inComputeNormal2(REAL *pu, REAL *pv, REAL *n)
-{
-  REAL mag; 
-
-  n[0] = pu[1]*pv[2] - pu[2]*pv[1];
-  n[1] = pu[2]*pv[0] - pu[0]*pv[2];
-  n[2] = pu[0]*pv[1] - pu[1]*pv[0];  
-
-  mag = sqrt(n[0]*n[0] + n[1]*n[1] + n[2]*n[2]);
-
-  if (mag > 0.0) {
-     n[0] /= mag; 
-     n[1] /= mag;
-     n[2] /= mag;
-  }
-}
- 
-
-
-/*Compute point and normal
- *see the head of inDoDomain2WithDerivs
- *for the meaning of the arguments
- */
-void OpenGLSurfaceEvaluator::inDoEvalCoord2(REAL u, REAL v,
-			   REAL *retPoint, REAL *retNormal)
-{
-
-  REAL du[4];
-  REAL dv[4];
-
- 
-  assert(global_ev_k>=3 && global_ev_k <= 4);
-  /*compute homegeneous point and partial derivatives*/
-  inDoDomain2WithDerivs(global_ev_k, u, v, global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, retPoint, du, dv);
-
-#ifdef AVOID_ZERO_NORMAL
-
-  if(myabs(dv[0]) <= MYZERO && myabs(dv[1]) <= MYZERO && myabs(dv[2]) <= MYZERO)
-    {
-
-      REAL tempdu[4];
-      REAL tempdata[4];
-      REAL u1 = global_ev_u1;
-      REAL u2 = global_ev_u2;
-      if(u-MYDELTA*(u2-u1) < u1)
-	u = u+ MYDELTA*(u2-u1);
-      else
-	u = u-MYDELTA*(u2-u1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, tempdu, dv);
-    }
-  if(myabs(du[0]) <= MYZERO && myabs(du[1]) <= MYZERO && myabs(du[2]) <= MYZERO)
-    {
-      REAL tempdv[4];
-      REAL tempdata[4];
-      REAL v1 = global_ev_v1;
-      REAL v2 = global_ev_v2;
-      if(v-MYDELTA*(v2-v1) < v1)
-	v = v+ MYDELTA*(v2-v1);
-      else
-	v = v-MYDELTA*(v2-v1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, du, tempdv);
-    }
-#endif
-
-
-  /*compute normal*/
-  switch(global_ev_k){
-  case 3:
-    inComputeNormal2(du, dv, retNormal);
-
-    break;
-  case 4:
-    inComputeFirstPartials(retPoint, du, dv);
-    inComputeNormal2(du, dv, retNormal);
-    /*transform the homegeneous coordinate of retPoint into inhomogenous one*/
-    retPoint[0] /= retPoint[3];
-    retPoint[1] /= retPoint[3];
-    retPoint[2] /= retPoint[3];
-    break;
-  }
-  /*output this vertex*/
-/*  inMeshStreamInsert(global_ms, retPoint, retNormal);*/
-
-
-
-  glNormal3fv(retNormal);
-  glVertex3fv(retPoint);
-
-
-
-
-  #ifdef DEBUG
-  printf("vertex(%f,%f,%f)\n", retPoint[0],retPoint[1],retPoint[2]);
-  #endif
-  
-
-
-}
-
-/*Compute point and normal
- *see the head of inDoDomain2WithDerivs
- *for the meaning of the arguments
- */
-void OpenGLSurfaceEvaluator::inDoEvalCoord2NOGE_BU(REAL u, REAL v,
-			   REAL *retPoint, REAL *retNormal)
-{
-
-  REAL du[4];
-  REAL dv[4];
-
- 
-  assert(global_ev_k>=3 && global_ev_k <= 4);
-  /*compute homegeneous point and partial derivatives*/
-//   inPreEvaluateBU(global_ev_k, global_ev_uorder, global_ev_vorder, (u-global_ev_u1)/(global_ev_u2-global_ev_u1), global_ev_ctlPoints);
-  inDoDomain2WithDerivsBU(global_ev_k, u, v, global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, retPoint, du, dv);
-
-
-#ifdef AVOID_ZERO_NORMAL
-
-  if(myabs(dv[0]) <= MYZERO && myabs(dv[1]) <= MYZERO && myabs(dv[2]) <= MYZERO)
-    {
-
-      REAL tempdu[4];
-      REAL tempdata[4];
-      REAL u1 = global_ev_u1;
-      REAL u2 = global_ev_u2;
-      if(u-MYDELTA*(u2-u1) < u1)
-	u = u+ MYDELTA*(u2-u1);
-      else
-	u = u-MYDELTA*(u2-u1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, tempdu, dv);
-    }
-  if(myabs(du[0]) <= MYZERO && myabs(du[1]) <= MYZERO && myabs(du[2]) <= MYZERO)
-    {
-      REAL tempdv[4];
-      REAL tempdata[4];
-      REAL v1 = global_ev_v1;
-      REAL v2 = global_ev_v2;
-      if(v-MYDELTA*(v2-v1) < v1)
-	v = v+ MYDELTA*(v2-v1);
-      else
-	v = v-MYDELTA*(v2-v1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, du, tempdv);
-    }
-#endif
-
-  /*compute normal*/
-  switch(global_ev_k){
-  case 3:
-    inComputeNormal2(du, dv, retNormal);
-    break;
-  case 4:
-    inComputeFirstPartials(retPoint, du, dv);
-    inComputeNormal2(du, dv, retNormal);
-    /*transform the homegeneous coordinate of retPoint into inhomogenous one*/
-    retPoint[0] /= retPoint[3];
-    retPoint[1] /= retPoint[3];
-    retPoint[2] /= retPoint[3];
-    break;
-  }
-}
-
-/*Compute point and normal
- *see the head of inDoDomain2WithDerivs
- *for the meaning of the arguments
- */
-void OpenGLSurfaceEvaluator::inDoEvalCoord2NOGE_BV(REAL u, REAL v,
-			   REAL *retPoint, REAL *retNormal)
-{
-
-  REAL du[4];
-  REAL dv[4];
-
- 
-  assert(global_ev_k>=3 && global_ev_k <= 4);
-  /*compute homegeneous point and partial derivatives*/
-//   inPreEvaluateBV(global_ev_k, global_ev_uorder, global_ev_vorder, (v-global_ev_v1)/(global_ev_v2-global_ev_v1), global_ev_ctlPoints);
-
-  inDoDomain2WithDerivsBV(global_ev_k, u, v, global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, retPoint, du, dv);
-
-
-#ifdef AVOID_ZERO_NORMAL
-
-  if(myabs(dv[0]) <= MYZERO && myabs(dv[1]) <= MYZERO && myabs(dv[2]) <= MYZERO)
-    {
-
-      REAL tempdu[4];
-      REAL tempdata[4];
-      REAL u1 = global_ev_u1;
-      REAL u2 = global_ev_u2;
-      if(u-MYDELTA*(u2-u1) < u1)
-	u = u+ MYDELTA*(u2-u1);
-      else
-	u = u-MYDELTA*(u2-u1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, tempdu, dv);
-    }
-  if(myabs(du[0]) <= MYZERO && myabs(du[1]) <= MYZERO && myabs(du[2]) <= MYZERO)
-    {
-      REAL tempdv[4];
-      REAL tempdata[4];
-      REAL v1 = global_ev_v1;
-      REAL v2 = global_ev_v2;
-      if(v-MYDELTA*(v2-v1) < v1)
-	v = v+ MYDELTA*(v2-v1);
-      else
-	v = v-MYDELTA*(v2-v1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, du, tempdv);
-    }
-#endif
-
-  /*compute normal*/
-  switch(global_ev_k){
-  case 3:
-    inComputeNormal2(du, dv, retNormal);
-    break;
-  case 4:
-    inComputeFirstPartials(retPoint, du, dv);
-    inComputeNormal2(du, dv, retNormal);
-    /*transform the homegeneous coordinate of retPoint into inhomogenous one*/
-    retPoint[0] /= retPoint[3];
-    retPoint[1] /= retPoint[3];
-    retPoint[2] /= retPoint[3];
-    break;
-  }
-}
- 
-
-/*Compute point and normal
- *see the head of inDoDomain2WithDerivs
- *for the meaning of the arguments
- */
-void OpenGLSurfaceEvaluator::inDoEvalCoord2NOGE(REAL u, REAL v,
-			   REAL *retPoint, REAL *retNormal)
-{
-
-  REAL du[4];
-  REAL dv[4];
-
- 
-  assert(global_ev_k>=3 && global_ev_k <= 4);
-  /*compute homegeneous point and partial derivatives*/
-  inDoDomain2WithDerivs(global_ev_k, u, v, global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, retPoint, du, dv);
-
-
-#ifdef AVOID_ZERO_NORMAL
-
-  if(myabs(dv[0]) <= MYZERO && myabs(dv[1]) <= MYZERO && myabs(dv[2]) <= MYZERO)
-    {
-
-      REAL tempdu[4];
-      REAL tempdata[4];
-      REAL u1 = global_ev_u1;
-      REAL u2 = global_ev_u2;
-      if(u-MYDELTA*(u2-u1) < u1)
-	u = u+ MYDELTA*(u2-u1);
-      else
-	u = u-MYDELTA*(u2-u1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, tempdu, dv);
-    }
-  if(myabs(du[0]) <= MYZERO && myabs(du[1]) <= MYZERO && myabs(du[2]) <= MYZERO)
-    {
-      REAL tempdv[4];
-      REAL tempdata[4];
-      REAL v1 = global_ev_v1;
-      REAL v2 = global_ev_v2;
-      if(v-MYDELTA*(v2-v1) < v1)
-	v = v+ MYDELTA*(v2-v1);
-      else
-	v = v-MYDELTA*(v2-v1);
-      inDoDomain2WithDerivs(global_ev_k, u,v,global_ev_u1, global_ev_u2, global_ev_uorder, global_ev_v1, global_ev_v2, global_ev_vorder, global_ev_ctlPoints, tempdata, du, tempdv);
-    }
-#endif
-
-  /*compute normal*/
-  switch(global_ev_k){
-  case 3:
-    inComputeNormal2(du, dv, retNormal);
-    break;
-  case 4:
-    inComputeFirstPartials(retPoint, du, dv);
-    inComputeNormal2(du, dv, retNormal);
-    /*transform the homegeneous coordinate of retPoint into inhomogenous one*/
-    retPoint[0] /= retPoint[3];
-    retPoint[1] /= retPoint[3];
-    retPoint[2] /= retPoint[3];
-    break;
-  }
-//  glNormal3fv(retNormal);
-//  glVertex3fv(retPoint);
-}
- 
-void OpenGLSurfaceEvaluator::inPreEvaluateBV(int k, int uorder, int vorder, REAL vprime, REAL *baseData)
-{
-  int j,row,col;
-  REAL p, pdv;
-  REAL *data;
-
-  if(global_vprime != vprime || global_vorder != vorder) {      
-    inPreEvaluateWithDeriv(vorder, vprime, global_vcoeff, global_vcoeffDeriv);
-    global_vprime = vprime;
-    global_vorder = vorder;
-  }
-
-  for(j=0; j<k; j++){
-    data = baseData+j;
-    for(row=0; row<uorder; row++){
-      p = global_vcoeff[0] * (*data);
-      pdv = global_vcoeffDeriv[0] * (*data);
-      data += k;
-      for(col = 1; col < vorder; col++){
-	p += global_vcoeff[col] *  (*data);
-	pdv += global_vcoeffDeriv[col] * (*data);
-	data += k;
-      }
-      global_BV[row][j]  = p;
-      global_PBV[row][j]  = pdv;
-    }
-  }
-}
-
-void OpenGLSurfaceEvaluator::inPreEvaluateBU(int k, int uorder, int vorder, REAL uprime, REAL *baseData)
-{
-  int j,row,col;
-  REAL p, pdu;
-  REAL *data;
-
-  if(global_uprime != uprime || global_uorder != uorder) {      
-    inPreEvaluateWithDeriv(uorder, uprime, global_ucoeff, global_ucoeffDeriv);
-    global_uprime = uprime;
-    global_uorder = uorder;
-  }
-
-  for(j=0; j<k; j++){
-    data = baseData+j;
-    for(col=0; col<vorder; col++){
-      data = baseData+j + k*col;
-      p = global_ucoeff[0] * (*data);
-      pdu = global_ucoeffDeriv[0] * (*data);
-      data += k*uorder;
-      for(row = 1; row < uorder; row++){
-	p += global_ucoeff[row] *  (*data);
-	pdu += global_ucoeffDeriv[row] * (*data);
-	data += k * uorder;
-      }
-      global_BU[col][j]  = p;
-      global_PBU[col][j]  = pdu;
-    }
-  }
-}
- 
-void OpenGLSurfaceEvaluator::inDoDomain2WithDerivsBU(int k, REAL u, REAL v,
-						      REAL u1, REAL u2, int uorder,
-						      REAL v1, REAL v2, int vorder,
-						      REAL *baseData,
-						      REAL *retPoint, REAL* retdu, REAL *retdv)
-{
-  int j, col;
-
-  REAL vprime;
-
-
-  if((u2 == u1) || (v2 == v1))
-    return;
-
-  vprime = (v - v1) / (v2 - v1);
-
-
-  if(global_vprime != vprime || global_vorder != vorder) {
-    inPreEvaluateWithDeriv(vorder, vprime, global_vcoeff, global_vcoeffDeriv);
-    global_vprime = vprime;
-    global_vorder = vorder;
-  }
-
-
-  for(j=0; j<k; j++)
-    {
-      retPoint[j] = retdu[j] = retdv[j] = 0.0;
-      for (col = 0; col < vorder; col++)  {
-	retPoint[j] += global_BU[col][j] * global_vcoeff[col];
-	retdu[j] += global_PBU[col][j] * global_vcoeff[col];
-	retdv[j] += global_BU[col][j] * global_vcoeffDeriv[col];
-      }
-    }
-}    
-   
-void OpenGLSurfaceEvaluator::inDoDomain2WithDerivsBV(int k, REAL u, REAL v,
-						      REAL u1, REAL u2, int uorder,
-						      REAL v1, REAL v2, int vorder,
-						      REAL *baseData,
-						      REAL *retPoint, REAL* retdu, REAL *retdv)
-{
-  int j, row;
-  REAL uprime;
-
-
-  if((u2 == u1) || (v2 == v1))
-    return;
-  uprime = (u - u1) / (u2 - u1);
-
-
-  if(global_uprime != uprime || global_uorder != uorder) {
-    inPreEvaluateWithDeriv(uorder, uprime, global_ucoeff, global_ucoeffDeriv);
-    global_uprime = uprime;
-    global_uorder = uorder;
-  }
-
-
-  for(j=0; j<k; j++)
-    {
-      retPoint[j] = retdu[j] = retdv[j] = 0.0;
-      for (row = 0; row < uorder; row++)  {
-	retPoint[j] += global_BV[row][j] * global_ucoeff[row];
-	retdu[j] += global_BV[row][j] * global_ucoeffDeriv[row];
-	retdv[j] += global_PBV[row][j] * global_ucoeff[row];
-      }
-    }
-}
-  
-
-/*
- *given a Bezier surface, and parameter (u,v), compute the point in the object space,
- *and the normal
- *k: the dimension of the object space: usually 2,3,or 4.
- *u,v: the paramter pair.
- *u1,u2,uorder: the Bezier polynomial of u coord is defined on [u1,u2] with order uorder.
- *v1,v2,vorder: the Bezier polynomial of v coord is defined on [v1,v2] with order vorder.
- *baseData: contrl points. arranged as: (u,v,k).
- *retPoint:  the computed point (one point) with dimension k.
- *retdu: the computed partial derivative with respect to u.
- *retdv: the computed partial derivative with respect to v.
- */
-void OpenGLSurfaceEvaluator::inDoDomain2WithDerivs(int k, REAL u, REAL v, 
-				REAL u1, REAL u2, int uorder, 
-				REAL v1,  REAL v2, int vorder, 
-				REAL *baseData,
-				REAL *retPoint, REAL *retdu, REAL *retdv)
-{
-    int j, row, col;
-    REAL uprime;
-    REAL vprime;
-    REAL p;
-    REAL pdv;
-    REAL *data;
-
-    if((u2 == u1) || (v2 == v1))
-	return;
-    uprime = (u - u1) / (u2 - u1);
-    vprime = (v - v1) / (v2 - v1);
-    
-    /* Compute coefficients for values and derivs */
-
-    /* Use already cached values if possible */
-    if(global_uprime != uprime || global_uorder != uorder) {
-        inPreEvaluateWithDeriv(uorder, uprime, global_ucoeff, global_ucoeffDeriv);
-	global_uorder = uorder;
-	global_uprime = uprime;
-    }
-    if (global_vprime != vprime || 
-	  global_vorder != vorder) {
-	inPreEvaluateWithDeriv(vorder, vprime, global_vcoeff, global_vcoeffDeriv);
-	global_vorder = vorder;
-	global_vprime = vprime;
-    }
-
-    for (j = 0; j < k; j++) {
-	data=baseData+j;
-	retPoint[j] = retdu[j] = retdv[j] = 0.0;
-	for (row = 0; row < uorder; row++)  {
-	    /* 
-	    ** Minor optimization.
-	    ** The col == 0 part of the loop is extracted so we don't
-	    ** have to initialize p and pdv to 0.
-	    */
-	    p = global_vcoeff[0] * (*data);
-	    pdv = global_vcoeffDeriv[0] * (*data);
-	    data += k;
-	    for (col = 1; col < vorder; col++) {
-		/* Incrementally build up p, pdv value */
-		p += global_vcoeff[col] * (*data);
-		pdv += global_vcoeffDeriv[col] * (*data);
-		data += k;
-	    }
-	    /* Use p, pdv value to incrementally add up r, du, dv */
-	    retPoint[j] += global_ucoeff[row] * p;
-	    retdu[j] += global_ucoeffDeriv[row] * p;
-	    retdv[j] += global_ucoeff[row] * pdv;
-	}
-    }  
-}
-
-
-/*
- *compute the Bezier polynomials C[n,j](v) for all j at v with 
- *return values stored in coeff[], where 
- *  C[n,j](v) = (n,j) * v^j * (1-v)^(n-j),
- *  j=0,1,2,...,n.
- *order : n+1
- *vprime: v
- *coeff : coeff[j]=C[n,j](v), this array store the returned values.
- *The algorithm is a recursive scheme:
- *   C[0,0]=1;
- *   C[n,j](v) = (1-v)*C[n-1,j](v) + v*C[n-1,j-1](v), n>=1
- *This code is copied from opengl/soft/so_eval.c:PreEvaluate
- */
-void OpenGLSurfaceEvaluator::inPreEvaluate(int order, REAL vprime, REAL *coeff)
-{
-  int i, j;
-  REAL oldval, temp;
-  REAL oneMinusvprime;
-  
-  /*
-   * Minor optimization
-   * Compute orders 1 and 2 outright, and set coeff[0], coeff[1] to
-     * their i==1 loop values to avoid the initialization and the i==1 loop.
-     */
-  if (order == 1) {
-    coeff[0] = 1.0;
-    return;
-  }
-  
-  oneMinusvprime = 1-vprime;
-  coeff[0] = oneMinusvprime;
-  coeff[1] = vprime;
-  if (order == 2) return;
-  
-  for (i = 2; i < order; i++) {
-    oldval = coeff[0] * vprime;
-    coeff[0] = oneMinusvprime * coeff[0];
-    for (j = 1; j < i; j++) {
-      temp = oldval;
-      oldval = coeff[j] * vprime;
-	    coeff[j] = temp + oneMinusvprime * coeff[j];
-    }
-    coeff[j] = oldval;
-  }
-}
-
-/*
- *compute the Bezier polynomials C[n,j](v) and derivatives for all j at v with 
- *return values stored in coeff[] and coeffDeriv[].
- *see the head of function inPreEvaluate for the definition of C[n,j](v)
- *and how to compute the values. 
- *The algorithm to compute the derivative is:
- *   dC[0,0](v) = 0.
- *   dC[n,j](v) = n*(dC[n-1,j-1](v) - dC[n-1,j](v)).
- *
- *This code is copied from opengl/soft/so_eval.c:PreEvaluateWidthDeriv
- */
-void OpenGLSurfaceEvaluator::inPreEvaluateWithDeriv(int order, REAL vprime, 
-    REAL *coeff, REAL *coeffDeriv)
-{
-  int i, j;
-  REAL oldval, temp;
-  REAL oneMinusvprime;
-  
-  oneMinusvprime = 1-vprime;
-  /*
-   * Minor optimization
-   * Compute orders 1 and 2 outright, and set coeff[0], coeff[1] to 
-   * their i==1 loop values to avoid the initialization and the i==1 loop.
-   */
-  if (order == 1) {
-    coeff[0] = 1.0;
-    coeffDeriv[0] = 0.0;
-    return;
-  } else if (order == 2) {
-    coeffDeriv[0] = -1.0;
-    coeffDeriv[1] = 1.0;
-    coeff[0] = oneMinusvprime;
-    coeff[1] = vprime;
-    return;
-  }
-  coeff[0] = oneMinusvprime;
-  coeff[1] = vprime;
-  for (i = 2; i < order - 1; i++) {
-    oldval = coeff[0] * vprime;
-    coeff[0] = oneMinusvprime * coeff[0];
-    for (j = 1; j < i; j++) {
-      temp = oldval;
-      oldval = coeff[j] * vprime;
-      coeff[j] = temp + oneMinusvprime * coeff[j];
-    }
-    coeff[j] = oldval;
-  }
-  coeffDeriv[0] = -coeff[0];
-  /*
-   ** Minor optimization:
-   ** Would make this a "for (j=1; j<order-1; j++)" loop, but it is always
-   ** executed at least once, so this is more efficient.
-   */
-  j=1;
-  do {
-    coeffDeriv[j] = coeff[j-1] - coeff[j];
-    j++;
-  } while (j < order - 1);
-  coeffDeriv[j] = coeff[j-1];
-  
-  oldval = coeff[0] * vprime;
-  coeff[0] = oneMinusvprime * coeff[0];
-  for (j = 1; j < i; j++) {
-    temp = oldval;
-    oldval = coeff[j] * vprime;
-    coeff[j] = temp + oneMinusvprime * coeff[j];
-  }
-  coeff[j] = oldval;
-}
-
-void OpenGLSurfaceEvaluator::inEvalULine(int n_points, REAL v, REAL* u_vals, 
-	int stride, REAL ret_points[][3], REAL ret_normals[][3])
-{
-  int i,k;
-  REAL temp[4];
-inPreEvaluateBV_intfac(v);
-
-  for(i=0,k=0; i<n_points; i++, k += stride)
-    {
-      inDoEvalCoord2NOGE_BV(u_vals[k],v,temp, ret_normals[i]);
-
-      ret_points[i][0] = temp[0];
-      ret_points[i][1] = temp[1];
-      ret_points[i][2] = temp[2];
-
-    }
-
-}
-
-void OpenGLSurfaceEvaluator::inEvalVLine(int n_points, REAL u, REAL* v_vals, 
-	int stride, REAL ret_points[][3], REAL ret_normals[][3])
-{
-  int i,k;
-  REAL temp[4];
-inPreEvaluateBU_intfac(u);
-  for(i=0,k=0; i<n_points; i++, k += stride)
-    {
-      inDoEvalCoord2NOGE_BU(u, v_vals[k], temp, ret_normals[i]);
-      ret_points[i][0] = temp[0];
-      ret_points[i][1] = temp[1];
-      ret_points[i][2] = temp[2];
-    }
-}
-      
-
-/*triangulate a strip bounded by two lines which are parallel  to U-axis
- *upperVerts: the verteces on the upper line
- *lowerVertx: the verteces on the lower line
- *n_upper >=1
- *n_lower >=1
- */
-void OpenGLSurfaceEvaluator::inEvalUStrip(int n_upper, REAL v_upper, REAL* upper_val, int n_lower, REAL v_lower, REAL* lower_val)
-{
-  int i,j,k,l;
-  REAL leftMostV[2];
- typedef REAL REAL3[3];
-
-  REAL3* upperXYZ = (REAL3*) malloc(sizeof(REAL3)*n_upper);
-  assert(upperXYZ);
-  REAL3* upperNormal = (REAL3*) malloc(sizeof(REAL3) * n_upper);
-  assert(upperNormal);
-  REAL3* lowerXYZ = (REAL3*) malloc(sizeof(REAL3)*n_lower);
-  assert(lowerXYZ);
-  REAL3* lowerNormal = (REAL3*) malloc(sizeof(REAL3) * n_lower);
-  assert(lowerNormal);
-  
-  inEvalULine(n_upper, v_upper, upper_val,  1, upperXYZ, upperNormal);
-  inEvalULine(n_lower, v_lower, lower_val,  1, lowerXYZ, lowerNormal);
-
-
-
-  REAL* leftMostXYZ;
-  REAL* leftMostNormal;
-
-  /*
-   *the algorithm works by scanning from left to right.
-   *leftMostV: the left most of the remaining verteces (on both upper and lower).
-   *           it could an element of upperVerts or lowerVerts.
-   *i: upperVerts[i] is the first vertex to the right of leftMostV on upper line   *j: lowerVerts[j] is the first vertex to the right of leftMostV on lower line   */
-
-  /*initialize i,j,and leftMostV
-   */
-  if(upper_val[0] <= lower_val[0])
-    {
-      i=1;
-      j=0;
-
-      leftMostV[0] = upper_val[0];
-      leftMostV[1] = v_upper;
-      leftMostXYZ = upperXYZ[0];
-      leftMostNormal = upperNormal[0];
-    }
-  else
-    {
-      i=0;
-      j=1;
-
-      leftMostV[0] = lower_val[0];
-      leftMostV[1] = v_lower;
-
-      leftMostXYZ = lowerXYZ[0];
-      leftMostNormal = lowerNormal[0];
-    }
-  
-  /*the main loop.
-   *the invariance is that: 
-   *at the beginning of each loop, the meaning of i,j,and leftMostV are 
-   *maintained
-   */
-  while(1)
-    {
-      if(i >= n_upper) /*case1: no more in upper*/
-        {
-          if(j<n_lower-1) /*at least two vertices in lower*/
-            {
-              bgntfan();
-	      glNormal3fv(leftMostNormal);
-              glVertex3fv(leftMostXYZ);
-
-              while(j<n_lower){
-		glNormal3fv(lowerNormal[j]);
-		glVertex3fv(lowerXYZ[j]);
-		j++;
-
-              }
-              endtfan();
-            }
-          break; /*exit the main loop*/
-        }
-      else if(j>= n_lower) /*case2: no more in lower*/
-        {
-          if(i<n_upper-1) /*at least two vertices in upper*/
-            {
-              bgntfan();
-	      glNormal3fv(leftMostNormal);
-	      glVertex3fv(leftMostXYZ);
-	      
-              for(k=n_upper-1; k>=i; k--) /*reverse order for two-side lighting*/
-		{
-		  glNormal3fv(upperNormal[k]);
-		  glVertex3fv(upperXYZ[k]);
-		}
-
-              endtfan();
-            }
-          break; /*exit the main loop*/
-        }
-      else /* case3: neither is empty, plus the leftMostV, there is at least one triangle to output*/
-        {
-          if(upper_val[i] <= lower_val[j])
-            {
-	      bgntfan();
-
-	      glNormal3fv(lowerNormal[j]);
-	      glVertex3fv(lowerXYZ[j]);
-
-              /*find the last k>=i such that 
-               *upperverts[k][0] <= lowerverts[j][0]
-               */
-              k=i;
-
-              while(k<n_upper)
-                {
-                  if(upper_val[k] > lower_val[j])
-                    break;
-                  k++;
-
-                }
-              k--;
-
-
-              for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
-                {
-		  glNormal3fv(upperNormal[l]);
-		  glVertex3fv(upperXYZ[l]);
-
-                }
-	      glNormal3fv(leftMostNormal);
-	      glVertex3fv(leftMostXYZ);
-
-              endtfan();
-
-              /*update i and leftMostV for next loop
-               */
-              i = k+1;
-
-	      leftMostV[0] = upper_val[k];
-	      leftMostV[1] = v_upper;
-	      leftMostNormal = upperNormal[k];
-	      leftMostXYZ = upperXYZ[k];
-            }
-          else /*upperVerts[i][0] > lowerVerts[j][0]*/
-            {
-	      bgntfan();
-	      glNormal3fv(upperNormal[i]);
-	      glVertex3fv(upperXYZ[i]);
-	      
-              glNormal3fv(leftMostNormal);
-	      glVertex3fv(leftMostXYZ);
-	      
-
-              /*find the last k>=j such that
-               *lowerverts[k][0] < upperverts[i][0]
-               */
-              k=j;
-              while(k< n_lower)
-                {
-                  if(lower_val[k] >= upper_val[i])
-                    break;
-		  glNormal3fv(lowerNormal[k]);
-		  glVertex3fv(lowerXYZ[k]);
-
-                  k++;
-                }
-              endtfan();
-
-              /*update j and leftMostV for next loop
-               */
-              j=k;
-	      leftMostV[0] = lower_val[j-1];
-	      leftMostV[1] = v_lower;
-
-	      leftMostNormal = lowerNormal[j-1];
-	      leftMostXYZ = lowerXYZ[j-1];
-            }     
-        }
-    }
-  //clean up 
-  free(upperXYZ);
-  free(lowerXYZ);
-  free(upperNormal);
-  free(lowerNormal);
-}
-
-/*triangulate a strip bounded by two lines which are parallel  to V-axis
- *leftVerts: the verteces on the left line
- *rightVertx: the verteces on the right line
- *n_left >=1
- *n_right >=1
- */
-void OpenGLSurfaceEvaluator::inEvalVStrip(int n_left, REAL u_left, REAL* left_val, int n_right, REAL u_right, REAL* right_val)
-{
-  int i,j,k,l;
-  REAL botMostV[2];
-  typedef REAL REAL3[3];
-
-  REAL3* leftXYZ = (REAL3*) malloc(sizeof(REAL3)*n_left);
-  assert(leftXYZ);
-  REAL3* leftNormal = (REAL3*) malloc(sizeof(REAL3) * n_left);
-  assert(leftNormal);
-  REAL3* rightXYZ = (REAL3*) malloc(sizeof(REAL3)*n_right);
-  assert(rightXYZ);
-  REAL3* rightNormal = (REAL3*) malloc(sizeof(REAL3) * n_right);
-  assert(rightNormal);
-  
-  inEvalVLine(n_left, u_left, left_val,  1, leftXYZ, leftNormal);
-  inEvalVLine(n_right, u_right, right_val,  1, rightXYZ, rightNormal);
-
-
-
-  REAL* botMostXYZ;
-  REAL* botMostNormal;
-
-  /*
-   *the algorithm works by scanning from bot to top.
-   *botMostV: the bot most of the remaining verteces (on both left and right).
-   *           it could an element of leftVerts or rightVerts.
-   *i: leftVerts[i] is the first vertex to the top of botMostV on left line   
-   *j: rightVerts[j] is the first vertex to the top of botMostV on rightline   */
-
-  /*initialize i,j,and botMostV
-   */
-  if(left_val[0] <= right_val[0])
-    {
-      i=1;
-      j=0;
-
-      botMostV[0] = u_left;
-      botMostV[1] = left_val[0];
-      botMostXYZ = leftXYZ[0];
-      botMostNormal = leftNormal[0];
-    }
-  else
-    {
-      i=0;
-      j=1;
-
-      botMostV[0] = u_right;
-      botMostV[1] = right_val[0];
-
-      botMostXYZ = rightXYZ[0];
-      botMostNormal = rightNormal[0];
-    }
-  
-  /*the main loop.
-   *the invariance is that: 
-   *at the beginning of each loop, the meaning of i,j,and botMostV are 
-   *maintained
-   */
-  while(1)
-    {
-      if(i >= n_left) /*case1: no more in left*/
-        {
-          if(j<n_right-1) /*at least two vertices in right*/
-            {
-              bgntfan();
-	      glNormal3fv(botMostNormal);
-              glVertex3fv(botMostXYZ);
-
-              while(j<n_right){
-		glNormal3fv(rightNormal[j]);
-		glVertex3fv(rightXYZ[j]);
-		j++;
-
-              }
-              endtfan();
-            }
-          break; /*exit the main loop*/
-        }
-      else if(j>= n_right) /*case2: no more in right*/
-        {
-          if(i<n_left-1) /*at least two vertices in left*/
-            {
-              bgntfan();
-	      glNormal3fv(botMostNormal);
-	      glVertex3fv(botMostXYZ);
-	      
-              for(k=n_left-1; k>=i; k--) /*reverse order for two-side lighting*/
-		{
-		  glNormal3fv(leftNormal[k]);
-		  glVertex3fv(leftXYZ[k]);
-		}
-
-              endtfan();
-            }
-          break; /*exit the main loop*/
-        }
-      else /* case3: neither is empty, plus the botMostV, there is at least one triangle to output*/
-        {
-          if(left_val[i] <= right_val[j])
-            {
-	      bgntfan();
-
-	      glNormal3fv(rightNormal[j]);
-	      glVertex3fv(rightXYZ[j]);
-
-              /*find the last k>=i such that 
-               *leftverts[k][0] <= rightverts[j][0]
-               */
-              k=i;
-
-              while(k<n_left)
-                {
-                  if(left_val[k] > right_val[j])
-                    break;
-                  k++;
-
-                }
-              k--;
-
-
-              for(l=k; l>=i; l--)/*the reverse is for two-side lighting*/
-                {
-		  glNormal3fv(leftNormal[l]);
-		  glVertex3fv(leftXYZ[l]);
-
-                }
-	      glNormal3fv(botMostNormal);
-	      glVertex3fv(botMostXYZ);
-
-              endtfan();
-
-              /*update i and botMostV for next loop
-               */
-              i = k+1;
-
-	      botMostV[0] = u_left;
-	      botMostV[1] = left_val[k];
-	      botMostNormal = leftNormal[k];
-	      botMostXYZ = leftXYZ[k];
-            }
-          else /*left_val[i] > right_val[j])*/
-            {
-	      bgntfan();
-	      glNormal3fv(leftNormal[i]);
-	      glVertex3fv(leftXYZ[i]);
-	      
-              glNormal3fv(botMostNormal);
-	      glVertex3fv(botMostXYZ);
-	      
-
-              /*find the last k>=j such that
-               *rightverts[k][0] < leftverts[i][0]
-               */
-              k=j;
-              while(k< n_right)
-                {
-                  if(right_val[k] >= left_val[i])
-                    break;
-		  glNormal3fv(rightNormal[k]);
-		  glVertex3fv(rightXYZ[k]);
-
-                  k++;
-                }
-              endtfan();
-
-              /*update j and botMostV for next loop
-               */
-              j=k;
-	      botMostV[0] = u_right;
-	      botMostV[1] = right_val[j-1];
-
-	      botMostNormal = rightNormal[j-1];
-	      botMostXYZ = rightXYZ[j-1];
-            }     
-        }
-    }
-  //clean up 
-  free(leftXYZ);
-  free(rightXYZ);
-  free(leftNormal);
-  free(rightNormal);
-}
-
-/*-----------------------begin evalMachine-------------------*/
-void OpenGLSurfaceEvaluator::inMap2fEM(int which, int k,
-	     REAL ulower,
-	     REAL uupper,
-	     int ustride,
-	     int uorder,
-	     REAL vlower,
-	     REAL vupper,
-	     int vstride,
-	     int vorder,
-	     REAL *ctlPoints)
-{
-  int i,j,x;
-  surfEvalMachine *temp_em;
-  switch(which){
-  case 0: //vertex
-    vertex_flag = 1;
-    temp_em = &em_vertex;
-    break;
-  case 1: //normal
-    normal_flag = 1;
-    temp_em = &em_normal;
-    break;
-  case 2: //color
-    color_flag = 1;
-    temp_em = &em_color;
-    break;
-  default:
-    texcoord_flag = 1;
-    temp_em = &em_texcoord;
-    break;
-  }
-
-  REAL *data = temp_em->ctlPoints;
-  
-  temp_em->uprime = -1;//initilized
-  temp_em->vprime = -1;
-
-  temp_em->k = k;
-  temp_em->u1 = ulower;
-  temp_em->u2 = uupper;
-  temp_em->ustride = ustride;
-  temp_em->uorder = uorder;
-  temp_em->v1 = vlower;
-  temp_em->v2 = vupper;
-  temp_em->vstride = vstride;
-  temp_em->vorder = vorder;
-
-  /*copy the contrl points from ctlPoints to global_ev_ctlPoints*/
-  for (i=0; i<uorder; i++) {
-    for (j=0; j<vorder; j++) {
-      for (x=0; x<k; x++) {
-	data[x] = ctlPoints[x];
-      }
-      ctlPoints += vstride;
-      data += k;
-    }
-    ctlPoints += ustride - vstride * vorder;
-  }
-}
-
-void OpenGLSurfaceEvaluator::inDoDomain2WithDerivsEM(surfEvalMachine *em, REAL u, REAL v, 
-				REAL *retPoint, REAL *retdu, REAL *retdv)
-{
-    int j, row, col;
-    REAL the_uprime;
-    REAL the_vprime;
-    REAL p;
-    REAL pdv;
-    REAL *data;
-
-    if((em->u2 == em->u1) || (em->v2 == em->v1))
-	return;
-    the_uprime = (u - em->u1) / (em->u2 - em->u1);
-    the_vprime = (v - em->v1) / (em->v2 - em->v1);
-    
-    /* Compute coefficients for values and derivs */
-
-    /* Use already cached values if possible */
-    if(em->uprime != the_uprime) {
-        inPreEvaluateWithDeriv(em->uorder, the_uprime, em->ucoeff, em->ucoeffDeriv);
-	em->uprime = the_uprime;
-    }
-    if (em->vprime != the_vprime) {
-	inPreEvaluateWithDeriv(em->vorder, the_vprime, em->vcoeff, em->vcoeffDeriv);
-	em->vprime = the_vprime;
-    }
-
-    for (j = 0; j < em->k; j++) {
-	data=em->ctlPoints+j;
-	retPoint[j] = retdu[j] = retdv[j] = 0.0;
-	for (row = 0; row < em->uorder; row++)  {
-	    /* 
-	    ** Minor optimization.
-	    ** The col == 0 part of the loop is extracted so we don't
-	    ** have to initialize p and pdv to 0.
-	    */
-	    p = em->vcoeff[0] * (*data);
-	    pdv = em->vcoeffDeriv[0] * (*data);
-	    data += em->k;
-	    for (col = 1; col < em->vorder; col++) {
-		/* Incrementally build up p, pdv value */
-		p += em->vcoeff[col] * (*data);
-		pdv += em->vcoeffDeriv[col] * (*data);
-		data += em->k;
-	    }
-	    /* Use p, pdv value to incrementally add up r, du, dv */
-	    retPoint[j] += em->ucoeff[row] * p;
-	    retdu[j] += em->ucoeffDeriv[row] * p;
-	    retdv[j] += em->ucoeff[row] * pdv;
-	}
-    }  
-}  
-
-void OpenGLSurfaceEvaluator::inDoDomain2EM(surfEvalMachine *em, REAL u, REAL v, 
-				REAL *retPoint)
-{
-    int j, row, col;
-    REAL the_uprime;
-    REAL the_vprime;
-    REAL p;
-    REAL *data;
-
-    if((em->u2 == em->u1) || (em->v2 == em->v1))
-	return;
-    the_uprime = (u - em->u1) / (em->u2 - em->u1);
-    the_vprime = (v - em->v1) / (em->v2 - em->v1);
-    
-    /* Compute coefficients for values and derivs */
-
-    /* Use already cached values if possible */
-    if(em->uprime != the_uprime) {
-        inPreEvaluate(em->uorder, the_uprime, em->ucoeff);
-	em->uprime = the_uprime;
-    }
-    if (em->vprime != the_vprime) {
-	inPreEvaluate(em->vorder, the_vprime, em->vcoeff);
-	em->vprime = the_vprime;
-    }
-
-    for (j = 0; j < em->k; j++) {
-	data=em->ctlPoints+j;
-	retPoint[j] = 0.0;
-	for (row = 0; row < em->uorder; row++)  {
-	    /* 
-	    ** Minor optimization.
-	    ** The col == 0 part of the loop is extracted so we don't
-	    ** have to initialize p and pdv to 0.
-	    */
-	    p = em->vcoeff[0] * (*data);
-	    data += em->k;
-	    for (col = 1; col < em->vorder; col++) {
-		/* Incrementally build up p, pdv value */
-		p += em->vcoeff[col] * (*data);
-		data += em->k;
-	    }
-	    /* Use p, pdv value to incrementally add up r, du, dv */
-	    retPoint[j] += em->ucoeff[row] * p;
-	}
-    }  
-}  
-
-
-void OpenGLSurfaceEvaluator::inDoEvalCoord2EM(REAL u, REAL v)
-{
-  REAL temp_vertex[5];
-  REAL temp_normal[3];
-  REAL temp_color[4];
-  REAL temp_texcoord[4];
-
-  if(texcoord_flag)
-    {
-      inDoDomain2EM(&em_texcoord, u,v, temp_texcoord);
-      texcoordCallBack(temp_texcoord, userData);
-    }
-  if(color_flag)
-    {
-      inDoDomain2EM(&em_color, u,v, temp_color);
-      colorCallBack(temp_color, userData);
-    }
-
-  if(normal_flag) //there is a normla map
-    {
-      inDoDomain2EM(&em_normal, u,v, temp_normal);
-      normalCallBack(temp_normal, userData);
-    
-      if(vertex_flag)
-	{
-	  inDoDomain2EM(&em_vertex, u,v,temp_vertex);
-	  if(em_vertex.k == 4)
-	    {
-	      temp_vertex[0] /= temp_vertex[3];
-	      temp_vertex[1] /= temp_vertex[3];
-	      temp_vertex[2] /= temp_vertex[3];	      
-	    }
-          temp_vertex[3]=u;
-          temp_vertex[4]=v;	  
-	  vertexCallBack(temp_vertex, userData);
-	}
-    }
-  else if(auto_normal_flag) //no normal map but there is a normal callbackfunctin
-    {
-      REAL du[4];
-      REAL dv[4];
-      
-      /*compute homegeneous point and partial derivatives*/
-      inDoDomain2WithDerivsEM(&em_vertex, u,v,temp_vertex,du,dv);
-
-      if(em_vertex.k ==4)
-	inComputeFirstPartials(temp_vertex, du, dv);
-
-#ifdef AVOID_ZERO_NORMAL
-      if(myabs(dv[0]) <= MYZERO && myabs(dv[1]) <= MYZERO && myabs(dv[2]) <= MYZERO)
-	{
-	  
-	  REAL tempdu[4];
-	  REAL tempdata[4];
-	  REAL u1 = em_vertex.u1;
-	  REAL u2 = em_vertex.u2;
-	  if(u-MYDELTA*(u2-u1) < u1)
-	    u = u+ MYDELTA*(u2-u1);
-	  else
-	    u = u-MYDELTA*(u2-u1);
-	  inDoDomain2WithDerivsEM(&em_vertex,u,v, tempdata, tempdu, dv);
-
-	  if(em_vertex.k ==4)
-	    inComputeFirstPartials(temp_vertex, du, dv);	  
-	}
-      else if(myabs(du[0]) <= MYZERO && myabs(du[1]) <= MYZERO && myabs(du[2]) <= MYZERO)
-	{
-	  REAL tempdv[4];
-	  REAL tempdata[4];
-	  REAL v1 = em_vertex.v1;
-	  REAL v2 = em_vertex.v2;
-	  if(v-MYDELTA*(v2-v1) < v1)
-	    v = v+ MYDELTA*(v2-v1);
-	  else
-	    v = v-MYDELTA*(v2-v1);
-	  inDoDomain2WithDerivsEM(&em_vertex,u,v, tempdata, du, tempdv);
-
-	  if(em_vertex.k ==4)
-	    inComputeFirstPartials(temp_vertex, du, dv);
-	}
-#endif
-
-      /*compute normal*/
-      switch(em_vertex.k){
-      case 3:
-
-	inComputeNormal2(du, dv, temp_normal);
-	break;
-      case 4:
-
-//	inComputeFirstPartials(temp_vertex, du, dv);
-	inComputeNormal2(du, dv, temp_normal);
-
-	/*transform the homegeneous coordinate of retPoint into inhomogenous one*/
-	temp_vertex[0] /= temp_vertex[3];
-	temp_vertex[1] /= temp_vertex[3];
-	temp_vertex[2] /= temp_vertex[3];
-	break;
-      }
-      normalCallBack(temp_normal, userData);
-      temp_vertex[3] = u;
-      temp_vertex[4] = v;
-      vertexCallBack(temp_vertex, userData);
-      
-    }/*end if auto_normal*/
-  else //no normal map, and no normal callback function
-    {
-      if(vertex_flag)
-	{
-	  inDoDomain2EM(&em_vertex, u,v,temp_vertex);
-	  if(em_vertex.k == 4)
-	    {
-	      temp_vertex[0] /= temp_vertex[3];
-	      temp_vertex[1] /= temp_vertex[3];
-	      temp_vertex[2] /= temp_vertex[3];	      
-	    }
-          temp_vertex[3] = u;
-          temp_vertex[4] = v;
-	  vertexCallBack(temp_vertex, userData);
-	}
-    }
-}
-
-
-void OpenGLSurfaceEvaluator::inBPMEvalEM(bezierPatchMesh* bpm)
-{
-  int i,j,k;
-  float u,v;
-
-  int ustride;
-  int vstride;
-
-#ifdef USE_LOD
-  if(bpm->bpatch != NULL)
-    {
-      bezierPatch* p=bpm->bpatch;
-      ustride = p->dimension * p->vorder;
-      vstride = p->dimension;
-
-      glMap2f( (p->dimension == 3)? GL_MAP2_VERTEX_3 : GL_MAP2_VERTEX_4,
-	      p->umin,
-	      p->umax,
-	      ustride,
-	      p->uorder,
-	      p->vmin,
-	      p->vmax,
-	      vstride,
-	      p->vorder,
-	      p->ctlpoints);
-
-
-/*
-    inMap2fEM(0, p->dimension,
-	  p->umin,
-	  p->umax,
-	  ustride,
-	  p->uorder,
-	  p->vmin,
-	  p->vmax,
-	  vstride,
-	  p->vorder,
-	  p->ctlpoints);
-*/
-    }
-#else
-
-  if(bpm->bpatch != NULL){
-    bezierPatch* p = bpm->bpatch;
-    ustride = p->dimension * p->vorder;
-    vstride = p->dimension;
-    inMap2fEM(0, p->dimension,
-	  p->umin,
-	  p->umax,
-	  ustride,
-	  p->uorder,
-	  p->vmin,
-	  p->vmax,
-	  vstride,
-	  p->vorder,
-	  p->ctlpoints);
-  }
-  if(bpm->bpatch_normal != NULL){
-    bezierPatch* p = bpm->bpatch_normal;
-    ustride = p->dimension * p->vorder;
-    vstride = p->dimension;
-    inMap2fEM(1, p->dimension,
-	  p->umin,
-	  p->umax,
-	  ustride,
-	  p->uorder,
-	  p->vmin,
-	  p->vmax,
-	  vstride,
-	  p->vorder,
-	  p->ctlpoints);
-  }
-  if(bpm->bpatch_color != NULL){
-    bezierPatch* p = bpm->bpatch_color;
-    ustride = p->dimension * p->vorder;
-    vstride = p->dimension;
-    inMap2fEM(2, p->dimension,
-	  p->umin,
-	  p->umax,
-	  ustride,
-	  p->uorder,
-	  p->vmin,
-	  p->vmax,
-	  vstride,
-	  p->vorder,
-	  p->ctlpoints);
-  }
-  if(bpm->bpatch_texcoord != NULL){
-    bezierPatch* p = bpm->bpatch_texcoord;
-    ustride = p->dimension * p->vorder;
-    vstride = p->dimension;
-    inMap2fEM(3, p->dimension,
-	  p->umin,
-	  p->umax,
-	  ustride,
-	  p->uorder,
-	  p->vmin,
-	  p->vmax,
-	  vstride,
-	  p->vorder,
-	  p->ctlpoints);
-  }
-#endif
-
-
-  k=0;
-  for(i=0; i<bpm->index_length_array; i++)
-    {
-#ifdef USE_LOD
-      if(bpm->type_array[i] == GL_POLYGON) //a mesh
-	{
-	  GLfloat *temp = bpm->UVarray+k;
-	  GLfloat u0 = temp[0];
-	  GLfloat v0 = temp[1];
-	  GLfloat u1 = temp[2];
-	  GLfloat v1 = temp[3];
-	  GLint nu = (GLint) ( temp[4]);
-	  GLint nv = (GLint) ( temp[5]);
-	  GLint umin = (GLint) ( temp[6]);
-	  GLint vmin = (GLint) ( temp[7]);
-	  GLint umax = (GLint) ( temp[8]);
-	  GLint vmax = (GLint) ( temp[9]);
-
-	  glMapGrid2f(LOD_eval_level*nu, u0, u1, LOD_eval_level*nv, v0, v1);
-	  glEvalMesh2(GL_FILL, LOD_eval_level*umin, LOD_eval_level*umax, LOD_eval_level*vmin, LOD_eval_level*vmax);
-	}
-      else
-	{
-	  LOD_eval(bpm->length_array[i], bpm->UVarray+k, bpm->type_array[i],
-		   0
-		   );
-	}
-	  k+= 2*bpm->length_array[i];       
-    
-#else //undef  USE_LOD
-
-#ifdef CRACK_TEST
-if(  bpm->bpatch->umin == 2 &&   bpm->bpatch->umax == 3
-  && bpm->bpatch->vmin ==2 &&    bpm->bpatch->vmax == 3)
-{
-REAL vertex[4];
-REAL normal[4];
-#ifdef DEBUG
-printf("***number ****1\n");
-#endif
-
-beginCallBack(GL_QUAD_STRIP, NULL);
-inDoEvalCoord2EM(3.0, 3.0);
-inDoEvalCoord2EM(2.0, 3.0);
-inDoEvalCoord2EM(3.0, 2.7);
-inDoEvalCoord2EM(2.0, 2.7);
-inDoEvalCoord2EM(3.0, 2.0);
-inDoEvalCoord2EM(2.0, 2.0);
-endCallBack(NULL);
-
-beginCallBack(GL_TRIANGLE_STRIP, NULL);
-inDoEvalCoord2EM(2.0, 3.0);
-inDoEvalCoord2EM(2.0, 2.0);
-inDoEvalCoord2EM(2.0, 2.7);
-endCallBack(NULL);
-
-}
-if(  bpm->bpatch->umin == 1 &&   bpm->bpatch->umax == 2
-  && bpm->bpatch->vmin ==2 &&    bpm->bpatch->vmax == 3)
-{
-#ifdef DEBUG
-printf("***number 3\n");
-#endif
-beginCallBack(GL_QUAD_STRIP, NULL);
-inDoEvalCoord2EM(2.0, 3.0);
-inDoEvalCoord2EM(1.0, 3.0);
-inDoEvalCoord2EM(2.0, 2.3);
-inDoEvalCoord2EM(1.0, 2.3);
-inDoEvalCoord2EM(2.0, 2.0);
-inDoEvalCoord2EM(1.0, 2.0);
-endCallBack(NULL);
-
-beginCallBack(GL_TRIANGLE_STRIP, NULL);
-inDoEvalCoord2EM(2.0, 2.3);
-inDoEvalCoord2EM(2.0, 2.0);
-inDoEvalCoord2EM(2.0, 3.0);
-endCallBack(NULL);
-
-}
-return;
-#endif //CRACK_TEST
-
-      beginCallBack(bpm->type_array[i], userData);
-
-      for(j=0; j<bpm->length_array[i]; j++)
-	{
-	  u = bpm->UVarray[k];
-	  v = bpm->UVarray[k+1];
-#ifdef USE_LOD
-          LOD_EVAL_COORD(u,v);
-//	  glEvalCoord2f(u,v);
-#else
-
-#ifdef  GENERIC_TEST
-          float temp_normal[3];
-          float temp_vertex[3];
-          if(temp_signal == 0)
-	    {
-	      gTessVertexSphere(u,v, temp_normal, temp_vertex);
-//printf("normal=(%f,%f,%f)\n", temp_normal[0], temp_normal[1], temp_normal[2])//printf("veretx=(%f,%f,%f)\n", temp_vertex[0], temp_vertex[1], temp_vertex[2]);
-              normalCallBack(temp_normal, userData);
-	      vertexCallBack(temp_vertex, userData);
-	    }
-          else if(temp_signal == 1)
-	    {
-	      gTessVertexCyl(u,v, temp_normal, temp_vertex);
-//printf("normal=(%f,%f,%f)\n", temp_normal[0], temp_normal[1], temp_normal[2])//printf("veretx=(%f,%f,%f)\n", temp_vertex[0], temp_vertex[1], temp_vertex[2]);
-              normalCallBack(temp_normal, userData);
-	      vertexCallBack(temp_vertex, userData);
-	    }
-	  else
-#endif //GENERIC_TEST
-
-	    inDoEvalCoord2EM(u,v);
-     
-#endif //USE_LOD
-
-	  k += 2;
-	}
-      endCallBack(userData);
-
-#endif //USE_LOD
-    }
-}
-
-void OpenGLSurfaceEvaluator::inBPMListEvalEM(bezierPatchMesh* list)
-{
-  bezierPatchMesh* temp;
-  for(temp = list; temp != NULL; temp = temp->next)
-    {
-      inBPMEvalEM(temp);
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/interface/mystdio.h b/src/glu/sgi/libnurbs/interface/mystdio.h
deleted file mode 100644
index 5ab49effd1a..00000000000
--- a/src/glu/sgi/libnurbs/interface/mystdio.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mystdio.h
- *
- */
-
-#ifndef __glumystdio_h_
-#define __glumystdio_h_
-
-#ifdef STANDALONE
-inline void _glu_dprintf( const char *, ... ) { }
-#endif
-
-#ifdef LIBRARYBUILD
-#ifndef NDEBUG
-#include <stdio.h>
-#define _glu_dprintf printf
-#else
-inline void _glu_dprintf( const char *, ... ) { }
-#endif
-#endif
-
-#ifdef GLBUILD
-inline void _glu_dprintf( const char *, ... ) { }
-#endif
-
-#ifndef NULL
-#define NULL		0
-#endif
-
-#endif /* __glumystdio_h_ */
diff --git a/src/glu/sgi/libnurbs/interface/mystdlib.h b/src/glu/sgi/libnurbs/interface/mystdlib.h
deleted file mode 100644
index ab7a3b273a3..00000000000
--- a/src/glu/sgi/libnurbs/interface/mystdlib.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mystdlib.h
- *
- */
-
-#ifndef __glumystdlib_h_
-#define __glumystdlib_h_
-
-#ifdef STANDALONE
-typedef unsigned int size_t;
-extern "C" void 	abort( void );
-extern "C" void *	malloc( size_t );
-extern "C" void 	free( void * );
-#endif
-
-#ifdef LIBRARYBUILD
-#include <stdlib.h>
-#endif
-
-#ifdef GLBUILD
-typedef unsigned int size_t;
-extern "C" void 	abort( void );
-extern "C" void *	malloc( size_t );
-extern "C" void 	free( void * );
-#endif
-
-#endif /* __glumystdlib_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/arc.cc b/src/glu/sgi/libnurbs/internals/arc.cc
deleted file mode 100644
index cd4c4048a0a..00000000000
--- a/src/glu/sgi/libnurbs/internals/arc.cc
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * arc.c++
- *
- */
-
-#include <stdio.h>
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "arc.h"
-#include "bin.h"
-#include "pwlarc.h"
-#include "simplemath.h"
-
-/* local preprocessor definitions */
-#define ZERO		0.00001/*0.000001*/
-
-const int	Arc::bezier_tag = (1<<13);
-const int	Arc::arc_tag = (1<<3);
-const int	Arc::tail_tag = (1<<6);
-
-/*--------------------------------------------------------------------------
- * makeSide - attach a pwl arc to an arc and mark it as a border arc
- *--------------------------------------------------------------------------
- */
-
-void
-Arc::makeSide( PwlArc *pwl, arc_side side )
-{
-    assert( pwl != 0);
-    assert( pwlArc == 0 );
-    assert( pwl->npts > 0 );
-    assert( pwl->pts != 0);
-    pwlArc = pwl;
-    clearbezier();
-    setside( side );
-}
-
-
-/*--------------------------------------------------------------------------
- * numpts - count number of points on arc loop
- *--------------------------------------------------------------------------
- */
-
-int
-Arc::numpts( void )
-{
-    Arc_ptr jarc = this;
-    int npts = 0;
-    do {
-	npts += jarc->pwlArc->npts;
-	jarc = jarc->next;
-    } while( jarc != this );
-    return npts;
-}
-
-/*--------------------------------------------------------------------------
- * markverts - mark each point with id of arc
- *--------------------------------------------------------------------------
- */
-
-void
-Arc::markverts( void )
-{
-    Arc_ptr jarc = this;
-        
-    do {
-	TrimVertex *p = jarc->pwlArc->pts;
-	for( int i=0; i<jarc->pwlArc->npts; i++ )
-	    p[i].nuid = jarc->nuid;
-	jarc = jarc->next;
-    } while( jarc != this );
-}
-
-/*--------------------------------------------------------------------------
- * getextrema - find axis extrema on arc loop
- *--------------------------------------------------------------------------
- */
-
-void
-Arc::getextrema( Arc_ptr extrema[4] )
-{
-    REAL leftpt, botpt, rightpt, toppt;
-
-    extrema[0] = extrema[1] = extrema[2] = extrema[3] = this;
-
-    leftpt = rightpt = this->tail()[0];
-    botpt  = toppt   = this->tail()[1];
-
-    for( Arc_ptr jarc = this->next; jarc != this; jarc = jarc->next ) {
-	if ( jarc->tail()[0] <	leftpt ||
-	    (jarc->tail()[0] <= leftpt && jarc->rhead()[0]<=leftpt))  {
-	    leftpt = jarc->pwlArc->pts->param[0];
-	    extrema[1] = jarc;
-	}
-	if ( jarc->tail()[0] >	rightpt ||
-	    (jarc->tail()[0] >= rightpt && jarc->rhead()[0] >= rightpt)) {
-	    rightpt = jarc->pwlArc->pts->param[0];
-	    extrema[3] = jarc;
-	}
-	if ( jarc->tail()[1] <	botpt ||
-	    (jarc->tail()[1] <= botpt && jarc->rhead()[1] <= botpt ))  {
-	    botpt = jarc->pwlArc->pts->param[1];
-	    extrema[2] = jarc;
-	}
-	if ( jarc->tail()[1] >	toppt ||
-	    (jarc->tail()[1] >= toppt && jarc->rhead()[1] >= toppt))  {
-	    toppt = jarc->pwlArc->pts->param[1];
-	    extrema[0] = jarc;
-	}
-    }
-}
-
-
-/*-------------------------------------------------------------------------
- * show - print to the stdout the vertices of a pwl arc
- *-------------------------------------------------------------------------
- */
-
-void
-Arc::show()
-{
-#ifndef NDEBUG
-    _glu_dprintf( "\tPWLARC NP: %d FL: 1\n", pwlArc->npts );
-    for( int i = 0; i < pwlArc->npts; i++ ) {
-	 _glu_dprintf( "\t\tVERTEX %f %f\n", pwlArc->pts[i].param[0],
-			pwlArc->pts[i].param[1] );
-    }
-#endif
-}
-
-/*-------------------------------------------------------------------------
- * print - print out the vertices of all pwl arcs on a loop
- *-------------------------------------------------------------------------
- */
-
-void
-Arc::print( void )
-{
-    Arc_ptr jarc = this;
-
-#ifndef NDEBUG
-    _glu_dprintf( "BGNTRIM\n" );
-#endif
-    do {
-	jarc->show( );
-	jarc = jarc->next;
-    } while (jarc != this);
-#ifndef NDEBUG
-    _glu_dprintf("ENDTRIM\n" );
-#endif
-}
-
-/*-------------------------------------------------------------------------
- * isDisconnected - check if tail of arc and head of prev meet
- *-------------------------------------------------------------------------
- */
-
-int
-Arc::isDisconnected( void )
-{
-    if( pwlArc == 0 ) return 0;
-    if( prev->pwlArc == 0 ) return 0;
-
-    REAL *p0 = tail();
-    REAL *p1 = prev->rhead();
-
-    if( ((p0[0] - p1[0]) > ZERO) || ((p1[0] - p0[0]) > ZERO) ||
-	((p0[1] - p1[1]) > ZERO) || ((p1[1] - p0[1]) > ZERO)  ) {
-#ifndef NDEBUG
-	_glu_dprintf( "x coord = %f %f %f\n", p0[0], p1[0], p0[0] - p1[0] );
-	_glu_dprintf( "y coord = %f %f %f\n", p0[1], p1[1], p0[1] - p1[1] );
-#endif
-	return 1;
-    } else {
-	/* average two points together */
-	p0[0] = p1[0] = (p1[0] + p0[0]) * 0.5;
-	p0[1] = p1[1] = (p1[1] + p0[1]) * 0.5;
-	return 0;
-    }
-}
-
-/*-------------------------------------------------------------------------
- * neq_vert - assert that two 2D vertices are not equal
- *-------------------------------------------------------------------------
- */
-
-inline static int
-neq_vert( REAL	*v1, REAL *v2 )
-{
-     return ((v1[0] != v2[0]) || (v1[1] != v2[1] )) ? 1 : 0;
-}
-
-/*-------------------------------------------------------------------------
- * check - verify consistency of a loop, including
- *		1) if pwl, no two consecutive vertices are identical
- *		2) the circular link pointers are valid
- *		3) the geometric info at the head and tail are consistent
- *-------------------------------------------------------------------------
- */
-
-int
-Arc::check( void )
-{
-    if( this == 0 ) return 1;
-    Arc_ptr jarc = this;
-    do {
-	assert( (jarc->pwlArc != 0) || (jarc->bezierArc != 0) );
-
-	if (jarc->prev == 0 || jarc->next == 0) {
-#ifndef NDEBUG
-	    _glu_dprintf( "checkjarc:null next/prev pointer\n");
-	    jarc->print( );
-#endif
-	    return 0;
-	}
-
-	if (jarc->next->prev != jarc) {
-#ifndef NDEBUG
-	    _glu_dprintf( "checkjarc: pointer linkage screwed up\n");
-	    jarc->print( );
-#endif
-	    return 0;
-	}
-
-	if( jarc->pwlArc ) {
-#ifndef NDEBUG
-	    assert( jarc->pwlArc->npts >= 1 );
-	    assert( jarc->pwlArc->npts < 100000 );
-/*
-	    for( int i=0; i < jarc->pwlArc->npts-1; i++ )
-		assert( neq_vert( jarc->pwlArc->pts[i].param,
-			     jarc->pwlArc->pts[i+1].param) );
-*/
-#endif
-	    if( jarc->prev->pwlArc ) {
-		if( jarc->tail()[1] != jarc->prev->rhead()[1] ) {
-#ifndef NDEBUG
-		    _glu_dprintf( "checkjarc: geometric linkage screwed up 1\n");
-		    jarc->prev->show();
-		    jarc->show();
-#endif
-		    return 0;
-		}
-		if( jarc->tail()[0] != jarc->prev->rhead()[0] ) {
-	        
-#ifndef NDEBUG
-		    _glu_dprintf( "checkjarc: geometric linkage screwed up 2\n");
-		    jarc->prev->show();
-		    jarc->show();
-#endif
-		    return 0;
-		}
-	    }
-	    if( jarc->next->pwlArc ) {
-		if( jarc->next->tail()[0] != jarc->rhead()[0] ) {
-#ifndef NDEBUG
-			_glu_dprintf( "checkjarc: geometric linkage screwed up 3\n");
-			jarc->show();
-			jarc->next->show();
-#endif
-			return 0;
-		}
-		if( jarc->next->tail()[1] != jarc->rhead()[1] ) {
-#ifndef NDEBUG
-			_glu_dprintf( "checkjarc: geometric linkage screwed up 4\n");
-			jarc->show();
-			jarc->next->show();
-#endif
-			return 0;
-		}
-	    }
-	    if( jarc->isbezier() ) {
-		assert( jarc->pwlArc->npts == 2 );
-		assert( (jarc->pwlArc->pts[0].param[0] == \
-                        jarc->pwlArc->pts[1].param[0]) ||\
-                        (jarc->pwlArc->pts[0].param[1] == \
-                        jarc->pwlArc->pts[1].param[1]) );
-	    }
-	}
-	jarc = jarc->next;
-    } while (jarc != this);
-    return 1;
-}
-
-
-#define TOL 0.00001
-
-inline long tooclose( REAL x, REAL y )
-{
-    return (glu_abs(x-y) < TOL) ?  1 : 0;
-}
-
-
-/*--------------------------------------------------------------------------
- * append - append a jordan arc to a circularly linked list
- *--------------------------------------------------------------------------
- */
-
-Arc_ptr
-Arc::append( Arc_ptr jarc )
-{
-    if( jarc != 0 ) {
-	next = jarc->next;
-	prev = jarc;
-	next->prev = prev->next = this;
-    } else {
-	next = prev = this;
-    }
-    return this;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/arc.h b/src/glu/sgi/libnurbs/internals/arc.h
deleted file mode 100644
index ca397f3b1fd..00000000000
--- a/src/glu/sgi/libnurbs/internals/arc.h
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * arc.h
- *
- */
-
-#ifndef __gluarc_h_
-#define __gluarc_h_
-
-#include "myassert.h"
-#include "bufpool.h"
-#include "mystdio.h"
-#include "types.h"
-#include "pwlarc.h"
-#include "trimvertex.h"
-
-class Bin;
-class Arc;
-struct BezierArc;	
-
-typedef class Arc *Arc_ptr; 
-
-enum arc_side { arc_none = 0, arc_right, arc_top, arc_left, arc_bottom };
-
-
-class Arc: public PooledObj { /* an arc, in two list, the trim list and bin */
-
-public:
-    static const int bezier_tag;
-    static const int arc_tag;
-    static const int tail_tag;
-    Arc_ptr		prev;		/* trim list pointer */
-    Arc_ptr		next;		/* trim list pointer */
-    Arc_ptr		link;		/* bin pointers */
-    BezierArc *		bezierArc;	/* associated bezier arc */
-    PwlArc *		pwlArc;	/* associated pwl arc */
-    long		type;		/* curve type */
-    long		nuid;
-
-    inline		Arc( Arc *, PwlArc * );
-    inline		Arc( arc_side, long );
-
-    Arc_ptr		append( Arc_ptr );
-    int			check( void );
-    int			isMonotone( void );
-    int			isDisconnected( void );
-    int			numpts( void );
-    void		markverts( void );
-    void		getextrema( Arc_ptr[4] );
-    void		print( void );
-    void		show( void );
-    void		makeSide( PwlArc *, arc_side );
-    inline int		isTessellated() { return pwlArc ? 1 : 0; }
-    inline long 	isbezier() 	{ return type & bezier_tag; }
-    inline void 	setbezier() 	{ type |= bezier_tag; }
-    inline void 	clearbezier() 	{ type &= ~bezier_tag; }
-    inline long		npts() 		{ return pwlArc->npts; }
-    inline TrimVertex *	pts() 		{ return pwlArc->pts; }
-    inline REAL * 	tail() 		{ return pwlArc->pts[0].param; }
-    inline REAL * 	head() 		{ return next->pwlArc->pts[0].param; }
-    inline REAL *	rhead() 	{ return pwlArc->pts[pwlArc->npts-1].param; }
-    inline long		ismarked()	{ return type & arc_tag; }
-    inline void		setmark()	{ type |= arc_tag; }
-    inline void		clearmark()	{ type &= (~arc_tag); }
-    inline void		clearside() 	{ type &= ~(0x7 << 8); }
-    inline void		setside( arc_side s ) { clearside(); type |= (((long)s)<<8); }
-    inline arc_side	getside() 	{ return (arc_side) ((type>>8) & 0x7); }
-    inline int		getitail()	{ return type & tail_tag; }
-    inline void		setitail()	{ type |= tail_tag; }
-    inline void		clearitail()	{ type &= (~tail_tag); }
-};
-
-/*--------------------------------------------------------------------------
- * Arc - initialize a new Arc with the same type and uid of
- *	    a given Arc and a given pwl arc
- *--------------------------------------------------------------------------
- */
-
-inline
-Arc::Arc( Arc *j, PwlArc *p )
-{
-    prev = NULL;
-    next = NULL;
-    link = NULL;
-    bezierArc = NULL;
-    pwlArc = p;
-    type = j->type;
-    nuid = j->nuid;
-}
-
-/*--------------------------------------------------------------------------
- * Arc - initialize a new Arc with the same type and uid of
- *	    a given Arc and a given pwl arc
- *--------------------------------------------------------------------------
- */
-
-inline
-Arc::Arc( arc_side side, long _nuid )
-{
-    prev = NULL;
-    next = NULL;
-    link = NULL;
-    bezierArc = NULL;
-    pwlArc = NULL;
-    type = 0;
-    setside( side );
-    nuid = _nuid;
-}
-
-#endif /* __gluarc_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/arcsorter.cc b/src/glu/sgi/libnurbs/internals/arcsorter.cc
deleted file mode 100644
index 1f85cb7108a..00000000000
--- a/src/glu/sgi/libnurbs/internals/arcsorter.cc
+++ /dev/null
@@ -1,172 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * arcsorter.c++
- *
- */
-
-#ifndef __gluarcsorter_c_
-#define __gluarcsorter_c_
-
-#include "glimports.h"
-#include "arc.h"
-#include "arcsorter.h"
-#include "subdivider.h"
-
-ArcSorter::ArcSorter(Subdivider &s) : Sorter( sizeof( Arc ** ) ), subdivider(s)
-{
-}
-
-int
-ArcSorter::qscmp( char *, char * )
-{
-    _glu_dprintf( "ArcSorter::qscmp: pure virtual called\n" );
-    return 0;
-}
-
-void
-ArcSorter::qsort( Arc **a, int n )
-{
-    Sorter::qsort( (void *) a, n );
-}
-
-void		
-ArcSorter::qsexc( char *i, char *j )// i<-j, j<-i 
-{
-    Arc **jarc1 = (Arc **) i;
-    Arc **jarc2 = (Arc **) j;
-    Arc *tmp = *jarc1;
-    *jarc1 = *jarc2;
-    *jarc2 = tmp;
-}	
-
-void		
-ArcSorter::qstexc( char *i, char *j, char *k )// i<-k, k<-j, j<-i
-{
-    Arc **jarc1 = (Arc **) i;
-    Arc **jarc2 = (Arc **) j;
-    Arc **jarc3 = (Arc **) k;
-    Arc *tmp = *jarc1;
-    *jarc1 = *jarc3;
-    *jarc3 = *jarc2;
-    *jarc2 = tmp;
-}
-  
-
-ArcSdirSorter::ArcSdirSorter( Subdivider &s ) : ArcSorter(s)
-{
-}
-
-int
-ArcSdirSorter::qscmp( char *i, char *j )
-{
-    Arc *jarc1 = *(Arc **) i;
-    Arc *jarc2 = *(Arc **) j;
-
-    int v1 = (jarc1->getitail() ? 0 : (jarc1->pwlArc->npts - 1));
-    int	v2 = (jarc2->getitail() ? 0 : (jarc2->pwlArc->npts - 1));
-
-    REAL diff =  jarc1->pwlArc->pts[v1].param[1] -
-	    	 jarc2->pwlArc->pts[v2].param[1];
-
-    if( diff < 0.0)
-	return -1;
-    else if( diff > 0.0)
-	return 1;
-    else {
-	if( v1 == 0 ) {
-	    if( jarc2->tail()[0] < jarc1->tail()[0] ) {
-	        return subdivider.ccwTurn_sl( jarc2, jarc1 ) ? 1 : -1;
-	    } else {
-	        return subdivider.ccwTurn_sr( jarc2, jarc1 ) ? -1 : 1;
-	    }
-	} else {
-	    if( jarc2->head()[0] < jarc1->head()[0] ) {
-	        return subdivider.ccwTurn_sl( jarc1, jarc2 ) ? -1 : 1;
-	    } else {
-	        return subdivider.ccwTurn_sr( jarc1, jarc2 ) ? 1 : -1;
-	    }
-	}
-    }    
-}
-
-ArcTdirSorter::ArcTdirSorter( Subdivider &s ) : ArcSorter(s)
-{
-}
-
-/*----------------------------------------------------------------------------
- * ArcTdirSorter::qscmp - 
-  *		   compare two axis monotone arcs that are incident 
- *		   to the line T == compare_value. Determine which of the
- *		   two intersects that line with a LESSER S value.  If
- *		   jarc1 does, return 1.  If jarc2 does, return -1. 
- *----------------------------------------------------------------------------
- */
-int
-ArcTdirSorter::qscmp( char *i, char *j )
-{
-    Arc *jarc1 = *(Arc **) i;
-    Arc *jarc2 = *(Arc **) j;
-
-    int v1 = (jarc1->getitail() ? 0 : (jarc1->pwlArc->npts - 1));
-    int	v2 = (jarc2->getitail() ? 0 : (jarc2->pwlArc->npts - 1));
-
-    REAL diff =  jarc1->pwlArc->pts[v1].param[0] -
-	         jarc2->pwlArc->pts[v2].param[0];
- 
-    if( diff < 0.0)
-	return 1;
-    else if( diff > 0.0)
-	return -1;
-    else {
-	if( v1 == 0 ) {
-	    if (jarc2->tail()[1] < jarc1->tail()[1]) {
-	        return subdivider.ccwTurn_tl( jarc2, jarc1 ) ? 1 : -1;
-	    } else {
-	        return subdivider.ccwTurn_tr( jarc2, jarc1 ) ? -1 : 1;
-	    }
-	} else {
-	    if( jarc2->head()[1] < jarc1->head()[1] )  {
-	        return subdivider.ccwTurn_tl( jarc1, jarc2 ) ? -1 : 1;
-	    } else {
-	        return subdivider.ccwTurn_tr( jarc1, jarc2 ) ? 1 : -1;
-	    }
-	}
-    }
-}
-
-
-
-#endif /* __gluarcsorter_c_ */
diff --git a/src/glu/sgi/libnurbs/internals/arcsorter.h b/src/glu/sgi/libnurbs/internals/arcsorter.h
deleted file mode 100644
index a55df926772..00000000000
--- a/src/glu/sgi/libnurbs/internals/arcsorter.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * arcsorter.h
- *
- */
-
-#ifndef __gluarcsorter_h_
-#define __gluarcsorter_h_
-
-#include "sorter.h"
-
-class Arc;
-class Subdivider;
-
-class ArcSorter : private Sorter {
-public:
-			ArcSorter(Subdivider &);
-    void		qsort( Arc **a, int n );
-protected:
-    virtual int		qscmp( char *, char * );
-    Subdivider&		subdivider;
-private:
-    void		qsexc( char *i, char *j );	// i<-j, j<-i 
-    void		qstexc( char *i, char *j, char *k ); // i<-k, k<-j, j<-i 
-};
-
-
-class ArcSdirSorter : public ArcSorter {
-public:
-			ArcSdirSorter( Subdivider & );
-private:
-    int			qscmp( char *, char * );
-};
-
-
-class ArcTdirSorter : public ArcSorter {
-public:
-			ArcTdirSorter( Subdivider & );
-private:
-    int			qscmp( char *, char * );
-};
-
-#endif /* __gluarcsorter_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/arctess.cc b/src/glu/sgi/libnurbs/internals/arctess.cc
deleted file mode 100644
index 29e7cf4c002..00000000000
--- a/src/glu/sgi/libnurbs/internals/arctess.cc
+++ /dev/null
@@ -1,611 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * arctessellator.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "arctess.h"
-#include "bufpool.h"
-#include "simplemath.h"
-#include "bezierarc.h"
-#include "trimvertex.h"
-#include "trimvertpool.h"
-
-#define NOELIMINATION
-
-#define steps_function(large, small, rate) (max(1, 1+ (int) ((large-small)/rate)));
-
-/*-----------------------------------------------------------------------------
- * ArcTessellator - construct an ArcTessellator
- *-----------------------------------------------------------------------------
- */
-
-ArcTessellator::ArcTessellator( TrimVertexPool& t, Pool& p ) 
-	: pwlarcpool(p), trimvertexpool(t)
-{
-}
-
-/*-----------------------------------------------------------------------------
- * ~ArcTessellator - destroy an ArcTessellator
- *-----------------------------------------------------------------------------
- */
-
-ArcTessellator::~ArcTessellator( void )
-{
-}
-
-/*-----------------------------------------------------------------------------
- * bezier - construct a bezier arc and attach it to an Arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::bezier( Arc *arc, REAL s1, REAL s2, REAL t1, REAL t2 )
-{
-    assert( arc != 0 );
-    assert( ! arc->isTessellated() );
-
-#ifndef NDEBUG
-    switch( arc->getside() ) {
-	case arc_left:
-	    assert( s1 == s2 );
-	    assert( t2 < t1 );
-	    break;
-	case arc_right:
-	    assert( s1 == s2 );
-	    assert( t1 < t2 );
-	    break;
-	case arc_top:
-	    assert( t1 == t2 );
-	    assert( s2 < s1 );
-	    break;
-	case arc_bottom:
-	    assert( t1 == t2 );
-	    assert( s1 < s2 );
-	    break;
-	case arc_none:
-	    (void) abort();
-	    break;
-    }
-#endif
-    
-    TrimVertex *p = trimvertexpool.get(2);
-    arc->pwlArc = new(pwlarcpool) PwlArc( 2, p );
-    p[0].param[0] = s1;
-    p[0].param[1] = t1;
-    p[1].param[0] = s2;
-    p[1].param[1] = t2;
-    assert( (s1 == s2) || (t1 == t2) );
-    arc->setbezier();
-}
-
-
-/*-----------------------------------------------------------------------------
- * pwl_left - construct a left boundary pwl arc and attach it to an arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::pwl_left( Arc *arc, REAL s, REAL t1, REAL t2, REAL rate )
-{
-    assert( t2 < t1 );
-
-/*    if(rate <= 0.06) rate = 0.06;*/
-/*    int nsteps = 1 + (int) ((t1 - t2) / rate ); */
-    int nsteps = steps_function(t1, t2, rate);
-
-
-    REAL stepsize = (t1 - t2) / (REAL) nsteps;
-
-    TrimVertex *newvert = trimvertexpool.get( nsteps+1 );
-    int i;
-    for( i = nsteps; i > 0; i-- ) {
-	newvert[i].param[0] = s;
-	newvert[i].param[1] = t2;
-	t2 += stepsize;
-    }
-    newvert[i].param[0] = s;
-    newvert[i].param[1] = t1;
-
-    arc->makeSide( new(pwlarcpool) PwlArc( nsteps+1, newvert ), arc_left );
-}
-
-/*-----------------------------------------------------------------------------
- * pwl_right - construct a right boundary pwl arc and attach it to an arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::pwl_right( Arc *arc, REAL s, REAL t1, REAL t2, REAL rate )
-{
-    assert( t1 < t2 );
-
-/*    if(rate <= 0.06) rate = 0.06;*/
-
-/*    int nsteps = 1 + (int) ((t2 - t1) / rate ); */
-    int nsteps = steps_function(t2,t1,rate);
-    REAL stepsize = (t2 - t1) / (REAL) nsteps;
-
-    TrimVertex *newvert = trimvertexpool.get( nsteps+1 );
-    int i;
-    for( i = 0; i < nsteps; i++ ) {
-	newvert[i].param[0] = s;
-	newvert[i].param[1] = t1;
-	t1 += stepsize;
-    }
-    newvert[i].param[0] = s;
-    newvert[i].param[1] = t2;
-
-    arc->makeSide( new(pwlarcpool) PwlArc( nsteps+1, newvert ), arc_right );
-}
-
-
-/*-----------------------------------------------------------------------------
- * pwl_top - construct a top boundary pwl arc and attach it to an arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::pwl_top( Arc *arc, REAL t, REAL s1, REAL s2, REAL rate )
-{
-    assert( s2 < s1 );
-
-/*    if(rate <= 0.06) rate = 0.06;*/
-
-/*    int nsteps = 1 + (int) ((s1 - s2) / rate ); */
-    int nsteps = steps_function(s1,s2,rate);
-    REAL stepsize = (s1 - s2) / (REAL) nsteps;
-
-    TrimVertex *newvert = trimvertexpool.get( nsteps+1 );
-    int i;
-    for( i = nsteps; i > 0; i-- ) {
-	newvert[i].param[0] = s2;
-	newvert[i].param[1] = t;
-	s2 += stepsize;
-    }
-    newvert[i].param[0] = s1;
-    newvert[i].param[1] = t;
-
-    arc->makeSide( new(pwlarcpool) PwlArc( nsteps+1, newvert ), arc_top );
-}
-
-/*-----------------------------------------------------------------------------
- * pwl_bottom - construct a bottom boundary pwl arc and attach it to an arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::pwl_bottom( Arc *arc, REAL t, REAL s1, REAL s2, REAL rate )
-{
-    assert( s1 < s2 );
-
-/*    if(rate <= 0.06) rate = 0.06;*/
-
-/*    int nsteps = 1 + (int) ((s2 - s1) / rate ); */
-    int nsteps = steps_function(s2,s1,rate);
-    REAL stepsize = (s2 - s1) / (REAL) nsteps;
-
-    TrimVertex *newvert = trimvertexpool.get( nsteps+1 );
-    int i;
-    for( i = 0; i < nsteps; i++ ) {
-	newvert[i].param[0] = s1;
-	newvert[i].param[1] = t;
-	s1 += stepsize;
-    }
-    newvert[i].param[0] = s2;
-    newvert[i].param[1] = t;
-
-    arc->makeSide( new(pwlarcpool) PwlArc( nsteps+1, newvert ), arc_bottom );
-}
-
-/*-----------------------------------------------------------------------------
- * pwl - construct a pwl arc and attach it to an arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::pwl( Arc *arc, REAL s1, REAL s2, REAL t1, REAL t2, REAL rate )
-{
-
-/*    if(rate <= 0.06) rate = 0.06;*/
-
-    int snsteps = 1 + (int) (glu_abs(s2 - s1) / rate );
-    int tnsteps = 1 + (int) (glu_abs(t2 - t1) / rate );
-    int nsteps = max(1,max( snsteps, tnsteps ));
-
-    REAL sstepsize = (s2 - s1) / (REAL) nsteps;
-    REAL tstepsize = (t2 - t1) / (REAL) nsteps;
-    TrimVertex *newvert = trimvertexpool.get( nsteps+1 );
-    long i;
-    for( i = 0; i < nsteps; i++ ) {
-	newvert[i].param[0] = s1;
-	newvert[i].param[1] = t1;
-	s1 += sstepsize;
-	t1 += tstepsize;
-    }
-    newvert[i].param[0] = s2;
-    newvert[i].param[1] = t2;
-
-    /* arc->makeSide( new(pwlarcpool) PwlArc( nsteps+1, newvert ), arc_bottom ); */
-    arc->pwlArc = new(pwlarcpool) PwlArc( nsteps+1, newvert );
-
-    arc->clearbezier();
-    arc->clearside( );
-}
-
-
-/*-----------------------------------------------------------------------------
- * tessellateLinear - constuct a linear pwl arc and attach it to an Arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::tessellateLinear( Arc *arc, REAL geo_stepsize, REAL arc_stepsize, int isrational )
-{
-    assert( arc->pwlArc == NULL );
-    REAL s1, s2, t1, t2;
-
-    //we don't need to scale by arc_stepsize if the trim curve
-    //is piecewise linear. Reason: In pwl_right, pwl_left, pwl_top, pwl_left,
-    //and pwl, the nsteps is computed by deltaU (or V) /stepsize. 
-    //The quantity deltaU/arc_stepsize doesn't have any meaning. And
-    //it causes problems: see bug 517641
-    REAL stepsize = geo_stepsize; /* * arc_stepsize*/;
-
-    BezierArc *b = arc->bezierArc;
-
-    if( isrational ) {
-	s1 = b->cpts[0] / b->cpts[2];
-	t1 = b->cpts[1] / b->cpts[2];
-	s2 = b->cpts[b->stride+0] / b->cpts[b->stride+2];
-	t2 = b->cpts[b->stride+1] / b->cpts[b->stride+2];
-    } else {
-	s1 = b->cpts[0];
-	t1 = b->cpts[1];
-	s2 = b->cpts[b->stride+0];
-	t2 = b->cpts[b->stride+1];
-    }
-    if( s1 == s2 )
-	if( t1 < t2 )
-	    pwl_right( arc, s1, t1, t2, stepsize );
-	else
-	    pwl_left( arc, s1, t1, t2, stepsize );
-    else if( t1 == t2 )
-	if( s1 < s2 ) 
-	    pwl_bottom( arc, t1, s1, s2, stepsize );
-	else
-	    pwl_top( arc, t1, s1, s2, stepsize );
-    else
-	pwl( arc, s1, s2, t1, t2, stepsize );
-}
-
-/*-----------------------------------------------------------------------------
- * tessellateNonlinear - constuct a nonlinear pwl arc and attach it to an Arc
- *-----------------------------------------------------------------------------
- */
-
-void
-ArcTessellator::tessellateNonlinear( Arc *arc, REAL geo_stepsize, REAL arc_stepsize, int isrational )
-{
-    assert( arc->pwlArc == NULL );
-
-    REAL stepsize	= geo_stepsize * arc_stepsize;
-
-    BezierArc *bezierArc = arc->bezierArc;
-
-    REAL size; //bounding box size of the curve in UV 
-    {
-      int i,j;
-      REAL min_u, min_v, max_u,max_v;
-      min_u = max_u = bezierArc->cpts[0];
-      min_v = max_v = bezierArc->cpts[1];
-      for(i=1, j=bezierArc->stride; i<bezierArc->order; i++, j+= bezierArc->stride)
-	{
-	  if(bezierArc->cpts[j] < min_u)
-	    min_u = bezierArc->cpts[j];
-	  if(bezierArc->cpts[j] > max_u)
-	    max_u = bezierArc->cpts[j];
-	  if(bezierArc->cpts[j+1] < min_v)
-	    min_v = bezierArc->cpts[j+1];	  
-	  if(bezierArc->cpts[j+1] > max_v)
-	    max_v = bezierArc->cpts[j+1]; 
-	}
-
-      size = max_u - min_u;
-      if(size < max_v - min_v)
-	size = max_v - min_v;
-    }
-      
-    /*int	nsteps 		= 1 + (int) (1.0/stepsize);*/
-
-    int nsteps = (int) (size/stepsize);
-    if(nsteps <=0)
-      nsteps=1;
-
-    TrimVertex *vert	= trimvertexpool.get( nsteps+1 );
-    REAL dp 		= 1.0/nsteps;
-
-
-    arc->pwlArc 	= new(pwlarcpool) PwlArc();
-    arc->pwlArc->pts 	= vert;
-
-    if( isrational ) {
-        REAL pow_u[MAXORDER], pow_v[MAXORDER], pow_w[MAXORDER];
-    	trim_power_coeffs( bezierArc, pow_u, 0 );
-    	trim_power_coeffs( bezierArc, pow_v, 1 );
-        trim_power_coeffs( bezierArc, pow_w, 2 );
-
-	/* compute first point exactly */
-        REAL *b = bezierArc->cpts;
-	vert->param[0] = b[0]/b[2];
-	vert->param[1] = b[1]/b[2];
-
-	/* strength reduction on p = dp * step would introduce error */
-	int step;
-#ifndef NOELIMINATION
-	int ocanremove = 0;
-#endif
-    	register long order =  bezierArc->order;
-	for( step=1, ++vert; step<nsteps; step++, vert++ ) {
-	    register REAL p = dp * step;
-    	    register REAL u = pow_u[0];
-            register REAL v = pow_v[0];
-	    register REAL w = pow_w[0];
-	    for( register int i = 1; i < order; i++ ) {
-	        u = u * p + pow_u[i];
-	        v = v * p + pow_v[i];
-	        w = w * p + pow_w[i];
-            }
-            vert->param[0] = u/w;
-    	    vert->param[1] = v/w;
-#ifndef NOELIMINATION
-	    REAL ds = glu_abs(vert[0].param[0] - vert[-1].param[0]);
-	    REAL dt = glu_abs(vert[0].param[1] - vert[-1].param[1]);
-	    int canremove = (ds<geo_stepsize && dt<geo_stepsize) ? 1 : 0;
-	    REAL ods=0.0, odt=0.0;
-
-	    if( ocanremove && canremove ) {
-		REAL nds = ds + ods;
-		REAL ndt = dt + odt;
-		if( nds<geo_stepsize && ndt<geo_stepsize ) {
-		    // remove previous point
-		    --vert;
-		    vert[0].param[0] = vert[1].param[0];
-		    vert[0].param[1] = vert[1].param[1];
-		    ods = nds;
-		    odt = ndt;
-		    ocanremove = 1;
-		} else {
-		    ocanremove = canremove;
-		    ods = ds;
-		    odt = dt;
-		}
-	    } else {
-		ocanremove = canremove;
-		ods = ds;
-		odt = dt;
-	    }
-#endif	
-	}
-
-	/* compute last point exactly */
-	b += (order - 1) * bezierArc->stride;
-	vert->param[0] = b[0]/b[2];
-	vert->param[1] = b[1]/b[2];
-
-    } else {
-        REAL pow_u[MAXORDER], pow_v[MAXORDER];
-	trim_power_coeffs( bezierArc, pow_u, 0 );
-	trim_power_coeffs( bezierArc, pow_v, 1 );
-
-	/* compute first point exactly */
-        REAL *b = bezierArc->cpts;
-	vert->param[0] = b[0];
-	vert->param[1] = b[1];
-
-	/* strength reduction on p = dp * step would introduce error */
-	int step;
-#ifndef NOELIMINATION
-	int ocanremove = 0;
-#endif
-    	register long order =  bezierArc->order;
-	for( step=1, ++vert; step<nsteps; step++, vert++ ) {
-	    register REAL p = dp * step;
-	    register REAL u = pow_u[0];
-            register REAL v = pow_v[0];
-            for( register int i = 1; i < bezierArc->order; i++ ) {
-	        u = u * p + pow_u[i];
-	        v = v * p + pow_v[i];
-            }
-            vert->param[0] = u;
-	    vert->param[1] = v;
-#ifndef NOELIMINATION
-	    REAL ds = glu_abs(vert[0].param[0] - vert[-1].param[0]);
-	    REAL dt = glu_abs(vert[0].param[1] - vert[-1].param[1]);
-	    int canremove = (ds<geo_stepsize && dt<geo_stepsize) ? 1 : 0;
-	    REAL ods=0.0, odt=0.0;
-
-	    if( ocanremove && canremove ) {
-		REAL nds = ds + ods;
-		REAL ndt = dt + odt;
-		if( nds<geo_stepsize && ndt<geo_stepsize ) {
-		    // remove previous point
-		    --vert;
-		    vert[0].param[0] = vert[1].param[0];
-		    vert[0].param[1] = vert[1].param[1];
-		    ods = nds;
-		    odt = ndt;
-		    ocanremove = 1;
-		} else {
-		    ocanremove = canremove;
-		    ods = ds;
-		    odt = dt;
-		}
-	    } else {
-		ocanremove = canremove;
-		ods = ds;
-		odt = dt;
-	    }
-#endif	
-	}
-
-	/* compute last point exactly */
-	b += (order - 1) * bezierArc->stride;
-	vert->param[0] = b[0];
-	vert->param[1] = b[1];
-    }
-    arc->pwlArc->npts = vert - arc->pwlArc->pts + 1;
-/*
-    for( TrimVertex *vt=pwlArc->pts; vt != vert-1; vt++ ) {
-	if( tooclose( vt[0].param[0], vt[1].param[0] ) )
-	    vt[1].param[0] = vt[0].param[0];
-	if( tooclose( vt[0].param[1], vt[1].param[1] ) )
-	    vt[1].param[1] = vt[0].param[1];
-    }
-*/
-}
-
-const REAL ArcTessellator::gl_Bernstein[][MAXORDER][MAXORDER] = {
- {
-  {1, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 }
- },
- {
-  {-1, 1, 0, 0, 0, 0, 0, 0 },
-  {1, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 }
- },
- {
-  {1, -2, 1, 0, 0, 0, 0, 0 },
-  {-2, 2, 0, 0, 0, 0, 0, 0 },
-  {1, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 }
- },
- {
-  {-1, 3, -3, 1, 0, 0, 0, 0 },
-  {3, -6, 3, 0, 0, 0, 0, 0 },
-  {-3, 3, 0, 0, 0, 0, 0, 0 },
-  {1, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 }
- },
- {
-  {1, -4, 6, -4, 1, 0, 0, 0 },
-  {-4, 12, -12, 4, 0, 0, 0, 0 },
-  {6, -12, 6, 0, 0, 0, 0, 0 },
-  {-4, 4, 0, 0, 0, 0, 0, 0 },
-  {1, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 }
- },
- {
-  {-1, 5, -10, 10, -5, 1, 0, 0 },
-  {5, -20, 30, -20, 5, 0, 0, 0 },
-  {-10, 30, -30, 10, 0, 0, 0, 0 },
-  {10, -20, 10, 0, 0, 0, 0, 0 },
-  {-5, 5, 0, 0, 0, 0, 0, 0 },
-  {1, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 }
- },
- {
-  {1, -6, 15, -20, 15, -6, 1, 0 },
-  {-6, 30, -60, 60, -30, 6, 0, 0 },
-  {15, -60, 90, -60, 15, 0, 0, 0 },
-  {-20, 60, -60, 20, 0, 0, 0, 0 },
-  {15, -30, 15, 0, 0, 0, 0, 0 },
-  {-6, 6, 0, 0, 0, 0, 0, 0 },
-  {1, 0, 0, 0, 0, 0, 0, 0 },
-  {0, 0, 0, 0, 0, 0, 0, 0 }
- },
- {
-  {-1, 7, -21, 35, -35, 21, -7, 1 },
-  {7, -42, 105, -140, 105, -42, 7, 0 },
-  {-21, 105, -210, 210, -105, 21, 0, 0 },
-  {35, -140, 210, -140, 35, 0, 0, 0 },
-  {-35, 105, -105, 35, 0, 0, 0, 0 },
-  {21, -42, 21, 0, 0, 0, 0, 0 },
-  {-7, 7, 0, 0, 0, 0, 0, 0 },
-  {1, 0, 0, 0, 0, 0, 0, 0 }
- }};
-
-
-/*-----------------------------------------------------------------------------
- * trim_power_coeffs - compute power basis coefficients from bezier coeffients
- *-----------------------------------------------------------------------------
- */
-void
-ArcTessellator::trim_power_coeffs( BezierArc *bez_arc, REAL *p, int coord )
-{
-    register int stride = bez_arc->stride;
-    register int order = bez_arc->order;
-    register REAL *base = bez_arc->cpts + coord;
-
-    REAL const (*mat)[MAXORDER][MAXORDER] = &gl_Bernstein[order-1];
-    REAL const (*lrow)[MAXORDER] = &(*mat)[order];
-
-    /* WIN32 didn't like the following line within the for-loop */
-    REAL const (*row)[MAXORDER] =  &(*mat)[0];
-    for( ; row != lrow; row++ ) {
-	register REAL s = 0.0;
-	register REAL *point = base;
-	register REAL const *mlast = *row + order;
-	for( REAL const *m = *row; m != mlast; m++, point += stride ) 
-	    s += *(m) * (*point);
-	*(p++) = s;
-    }
-}
diff --git a/src/glu/sgi/libnurbs/internals/arctess.h b/src/glu/sgi/libnurbs/internals/arctess.h
deleted file mode 100644
index 7802af90c0a..00000000000
--- a/src/glu/sgi/libnurbs/internals/arctess.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * arctess.h
- *
- */
-
-#ifndef __gluarctess_h_
-#define __gluarctess_h_
-
-#include "defines.h"
-#include "types.h"
-#include "arc.h"
-
-struct BezierArc;
-class Pool;
-class TrimVertexPool;
-
-class ArcTessellator {
-public:
-			ArcTessellator( TrimVertexPool&, Pool& );
-			~ArcTessellator( void );
-    void		bezier( Arc_ptr, REAL, REAL, REAL, REAL );
-    void		pwl( Arc_ptr, REAL, REAL, REAL, REAL, REAL );
-    void		pwl_left( Arc_ptr, REAL, REAL, REAL, REAL );
-    void		pwl_right( Arc_ptr, REAL, REAL, REAL, REAL );
-    void		pwl_top( Arc_ptr, REAL, REAL, REAL, REAL );
-    void		pwl_bottom( Arc_ptr, REAL, REAL, REAL, REAL );
-    void		tessellateLinear( Arc_ptr, REAL, REAL, int );
-    void		tessellateNonlinear( Arc_ptr, REAL, REAL, int );
-private:
-    static const REAL 	gl_Bernstein[][MAXORDER][MAXORDER];
-    Pool&		pwlarcpool;
-    TrimVertexPool&	trimvertexpool;
-    static void		trim_power_coeffs( BezierArc *, REAL[MAXORDER], int );
-};
-
-#endif /* __gluarctess_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/backend.cc b/src/glu/sgi/libnurbs/internals/backend.cc
deleted file mode 100644
index 27b41ebb29e..00000000000
--- a/src/glu/sgi/libnurbs/internals/backend.cc
+++ /dev/null
@@ -1,588 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * backend.c++
- *
- */
-
-/* Bezier surface backend
-	- interprets display mode (wireframe,shaded,...)
-*/
-#include <stdio.h>
-#include "glimports.h"
-#include "mystdio.h"
-#include "backend.h"
-#include "basiccrveval.h"
-#include "basicsurfeval.h"
-
-#define NOWIREFRAME
-
-
-/*-------------------------------------------------------------------------
- * bgnsurf - preamble to surface definition and evaluations
- *-------------------------------------------------------------------------
- */
-void
-Backend::bgnsurf( int wiretris, int wirequads, long nuid )
-{
-/*#ifndef NOWIREFRAME*/ //need this for old version
-    wireframetris = wiretris;
-    wireframequads = wirequads;
-/*#endif*/
-
-    /*in the spec, GLU_DISPLAY_MODE is either
-     * GLU_FILL
-     * GLU_OUTLINE_POLY
-     * GLU_OUTLINE_PATCH.
-     *In fact, GLU_FLL is has the same effect as
-     * set GL_FRONT_AND_BACK to be GL_FILL
-     * and GLU_OUTLINE_POLY is the same as set 
-     *     GL_FRONT_AND_BACK to be GL_LINE
-     *It is more efficient to do this once at the beginning of
-     *each surface than to do it for each primitive.
-     *   The internal has more options: outline_triangle and outline_quad
-     *can be seperated. But since this is not in spec, and more importantly,
-     *this is not so useful, so we don't need to keep this option.
-     */
-
-    surfaceEvaluator.bgnmap2f( nuid );
-
-    if(wiretris)
-      surfaceEvaluator.polymode(N_MESHLINE);
-    else
-      surfaceEvaluator.polymode(N_MESHFILL);
-}
-
-void
-Backend::patch( REAL ulo, REAL uhi, REAL vlo, REAL vhi )
-{
-    surfaceEvaluator.domain2f( ulo, uhi, vlo, vhi );
-}
-
-void
-Backend::surfbbox( long type, REAL *from, REAL *to )
-{
-    surfaceEvaluator.range2f( type, from, to );
-}
-
-/*-------------------------------------------------------------------------
- * surfpts - pass a desription of a surface map
- *-------------------------------------------------------------------------
- */
-void 
-Backend::surfpts(
-    long type, 		/* geometry, color, texture, normal	*/
-    REAL *pts, 		/* control points			*/
-    long ustride,	/* distance to next point in u direction */
-    long vstride,	/* distance to next point in v direction */
-    int uorder,	/* u parametric order			*/
-    int vorder,	/* v parametric order			*/
-    REAL ulo,		/* u lower bound			*/
-    REAL uhi,		/* u upper bound			*/
-    REAL vlo,		/* v lower bound			*/
-    REAL vhi )		/* v upper bound			*/
-{
-    surfaceEvaluator.map2f( type,ulo,uhi,ustride,uorder,vlo,vhi,vstride,vorder,pts );
-    surfaceEvaluator.enable( type );
-}
-
-/*-------------------------------------------------------------------------
- * surfgrid - define a lattice of points with origin and offset
- *-------------------------------------------------------------------------
- */
-void
-Backend::surfgrid( REAL u0, REAL u1, long nu, REAL v0, REAL v1, long nv )
-{
-    surfaceEvaluator.mapgrid2f( nu, u0, u1, nv, v0, v1 );
-}
-
-/*-------------------------------------------------------------------------
- * surfmesh - evaluate a mesh of points on lattice
- *-------------------------------------------------------------------------
- */
-void
-Backend::surfmesh( long u, long v, long n, long m )
-{
-#ifndef NOWIREFRAME
-    if( wireframequads ) {
-	long v0,  v1;
-	long u0f = u, u1f = u+n;
-	long v0f = v, v1f = v+m;
-	long parity = (u & 1);
-
-        for( v0 = v0f, v1 = v0f++ ; v0<v1f; v0 = v1, v1++ ) {
-	    surfaceEvaluator.bgnline();
-	    for( long u = u0f; u<=u1f; u++ ) {
-		if( parity ) {
-		    surfaceEvaluator.evalpoint2i( u, v0 );
-		    surfaceEvaluator.evalpoint2i( u, v1 );
-		} else {
-		    surfaceEvaluator.evalpoint2i( u, v1 );
-		    surfaceEvaluator.evalpoint2i( u, v0 );
-		}
-		parity = 1 - parity;
-	    }
-	    surfaceEvaluator.endline();
-	}
-    } else {
-	surfaceEvaluator.mapmesh2f( N_MESHFILL, u, u+n, v, v+m );
-    }
-#else
-    if( wireframequads ) {
-
-	surfaceEvaluator.mapmesh2f( N_MESHLINE, u, u+n, v, v+m );
-    } else {
-
-	surfaceEvaluator.mapmesh2f( N_MESHFILL, u, u+n, v, v+m );
-    }
-#endif
-}
-
-/*-------------------------------------------------------------------------
- * endsurf - postamble to surface
- *-------------------------------------------------------------------------
- */
-void
-Backend::endsurf( void )
-{
-    surfaceEvaluator.endmap2f();
-}
-
-/***************************************/
-void
-Backend::bgntfan( void )
-{
-  surfaceEvaluator.bgntfan();
-/*
-  if(wireframetris)	
-    surfaceEvaluator.polymode( N_MESHLINE );
-  else
-    surfaceEvaluator.polymode( N_MESHFILL );
-*/
-}
-
-void
-Backend::endtfan( void )
-{
-   surfaceEvaluator.endtfan();
-}
-
-void
-Backend::bgnqstrip( void )
-{
-   surfaceEvaluator.bgnqstrip();
-/*
-  if(wireframequads)
-    surfaceEvaluator.polymode( N_MESHLINE );
-  else
-    surfaceEvaluator.polymode( N_MESHFILL );    
-*/
-}
-
-void
-Backend::endqstrip( void )
-{
-   surfaceEvaluator.endqstrip();
-}
-
-void
-Backend::evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
-                       int n_lower, REAL v_lower, REAL* lower_val
-                       )
-{
-	surfaceEvaluator.evalUStrip(n_upper, v_upper, upper_val, 
-				      n_lower, v_lower, lower_val);
-}
-
-void 
-Backend::evalVStrip(int n_left, REAL u_left, REAL* left_val, 
-		    int n_right, REAL u_right, REAL* right_val
-		    )
-{
-  surfaceEvaluator.evalVStrip(n_left, u_left, left_val,
-				n_right, u_right, right_val);
-}
-
-/***************************************/
-   
-
-/*-------------------------------------------------------------------------
- * bgntmesh - preamble to a triangle mesh
- *-------------------------------------------------------------------------
- */
-void
-Backend::bgntmesh( const char * )		
-{
-#ifndef NOWIREFRAME
-
-    meshindex = 0;	/* I think these need to be initialized to zero */
-    npts = 0;
-
-    if( !wireframetris ) {
-        surfaceEvaluator.bgntmesh();
-    }
-#else
-
-    if( wireframetris ) {
-        surfaceEvaluator.bgntmesh();
-	surfaceEvaluator.polymode( N_MESHLINE );
-    } else {
-        surfaceEvaluator.bgntmesh();
-	surfaceEvaluator.polymode( N_MESHFILL );
-    }
-#endif
-}
-
-void
-Backend::tmeshvert( GridTrimVertex *v )
-{
-    if( v->isGridVert() ) {
-	tmeshvert( v->g );
-    } else {
-	tmeshvert( v->t );
-    }
-}
-
-void
-Backend::tmeshvertNOGE(TrimVertex *t)
-{
-//	surfaceEvaluator.inDoEvalCoord2NOGE( t->param[0], t->param[1], temp, ttt);
-#ifdef USE_OPTTT
-	surfaceEvaluator.inDoEvalCoord2NOGE( t->param[0], t->param[1], t->cache_point, t->cache_normal);    
-#endif
-}
-
-//opt for a line with the same u.
-void
-Backend::tmeshvertNOGE_BU(TrimVertex *t)
-{
-#ifdef USE_OPTTT
-	surfaceEvaluator.inDoEvalCoord2NOGE_BU( t->param[0], t->param[1], t->cache_point, t->cache_normal);    
-#endif
-}
-
-//opt for a line with the same v.
-void
-Backend::tmeshvertNOGE_BV(TrimVertex *t)
-{
-#ifdef USE_OPTTT
-	surfaceEvaluator.inDoEvalCoord2NOGE_BV( t->param[0], t->param[1], t->cache_point, t->cache_normal);    
-#endif
-}
-
-void
-Backend::preEvaluateBU(REAL u)
-{
-	surfaceEvaluator.inPreEvaluateBU_intfac(u);
-}
-
-void 
-Backend::preEvaluateBV(REAL v)
-{
-	surfaceEvaluator.inPreEvaluateBV_intfac(v);
-}
-
-
-/*-------------------------------------------------------------------------
- * tmeshvert - evaluate a point on a triangle mesh
- *-------------------------------------------------------------------------
- */
-void
-Backend::tmeshvert( TrimVertex *t )
-{
-
-#ifndef NOWIREFRAME
-    const long nuid = t->nuid;
-#endif
-    const REAL u = t->param[0];
-    const REAL v = t->param[1];
-
-#ifndef NOWIREFRAME
-    npts++;
-    if( wireframetris ) {
-	if( npts >= 3 ) {
-	    surfaceEvaluator.bgnclosedline();
-	    if( mesh[0][2] == 0 )
-		surfaceEvaluator.evalcoord2f( mesh[0][3], mesh[0][0], mesh[0][1] );
-	    else
-		surfaceEvaluator.evalpoint2i( (long) mesh[0][0], (long) mesh[0][1] );
-	    if( mesh[1][2] == 0 )
-		surfaceEvaluator.evalcoord2f( mesh[1][3], mesh[1][0], mesh[1][1] );
-	    else
-		surfaceEvaluator.evalpoint2i( (long) mesh[1][0], (long) mesh[1][1] );
-	    surfaceEvaluator.evalcoord2f( nuid, u, v );
-	    surfaceEvaluator.endclosedline();
-	}
-        mesh[meshindex][0] = u;
-        mesh[meshindex][1] = v;
-	mesh[meshindex][2] = 0;
-	mesh[meshindex][3] = nuid;
-        meshindex = (meshindex+1) % 2;
-    } else {
-	surfaceEvaluator.evalcoord2f( nuid, u, v );
-    }
-#else
-          
-          surfaceEvaluator.evalcoord2f( 0, u, v );
-//for uninitial memory read          surfaceEvaluator.evalcoord2f( nuid, u, v );
-#endif
-}
-
-//the same as tmeshvert(trimvertex), for efficiency purpose
-void
-Backend::tmeshvert( REAL u, REAL v )
-{
-#ifndef NOWIREFRAME
-    const long nuid = 0;
-    
-    npts++;
-    if( wireframetris ) {
-	if( npts >= 3 ) {
-	    surfaceEvaluator.bgnclosedline();
-	    if( mesh[0][2] == 0 )
-		surfaceEvaluator.evalcoord2f( mesh[0][3], mesh[0][0], mesh[0][1] );
-	    else
-		surfaceEvaluator.evalpoint2i( (long) mesh[0][0], (long) mesh[0][1] );
-	    if( mesh[1][2] == 0 )
-		surfaceEvaluator.evalcoord2f( mesh[1][3], mesh[1][0], mesh[1][1] );
-	    else
-		surfaceEvaluator.evalpoint2i( (long) mesh[1][0], (long) mesh[1][1] );
-	    surfaceEvaluator.evalcoord2f( nuid, u, v );
-	    surfaceEvaluator.endclosedline();
-	}
-        mesh[meshindex][0] = u;
-        mesh[meshindex][1] = v;
-	mesh[meshindex][2] = 0;
-	mesh[meshindex][3] = nuid;
-        meshindex = (meshindex+1) % 2;
-    } else {
-	surfaceEvaluator.evalcoord2f( nuid, u, v );
-    }
-#else
-          
-          surfaceEvaluator.evalcoord2f( 0, u, v );
-#endif
-}
-
-/*-------------------------------------------------------------------------
- * tmeshvert - evaluate a grid point of a triangle mesh
- *-------------------------------------------------------------------------
- */
-void
-Backend::tmeshvert( GridVertex *g )
-{
-    const long u = g->gparam[0];
-    const long v = g->gparam[1];
-
-#ifndef NOWIREFRAME
-    npts++;
-    if( wireframetris ) {
-	if( npts >= 3 ) {
-	    surfaceEvaluator.bgnclosedline();
-	    if( mesh[0][2] == 0 )
-		surfaceEvaluator.evalcoord2f( (long) mesh[0][3], mesh[0][0], mesh[0][1] );
-	    else
-		surfaceEvaluator.evalpoint2i( (long) mesh[0][0], (long) mesh[0][1] );
-	    if( mesh[1][2] == 0 )
-		surfaceEvaluator.evalcoord2f( (long) mesh[1][3], mesh[1][0], mesh[1][1] );
-	    else
-		surfaceEvaluator.evalpoint2i( (long) mesh[1][0], (long) mesh[1][1] );
-	    surfaceEvaluator.evalpoint2i( u, v );
-	    surfaceEvaluator.endclosedline();
-	}
-        mesh[meshindex][0] = u;
-        mesh[meshindex][1] = v;
-	mesh[meshindex][2] = 1;
-        meshindex = (meshindex+1) % 2;
-    } else {
-        surfaceEvaluator.evalpoint2i( u, v );
-    }
-#else
-    surfaceEvaluator.evalpoint2i( u, v );
-#endif
-}
-
-/*-------------------------------------------------------------------------
- * swaptmesh - perform a swap of the triangle mesh pointers
- *-------------------------------------------------------------------------
- */
-void
-Backend::swaptmesh( void )
-{
-#ifndef NOWIREFRAME
-    if( wireframetris ) {
-        meshindex = 1 - meshindex;
-    } else {
-	surfaceEvaluator.swaptmesh();
-    }
-#else
-    surfaceEvaluator.swaptmesh();
-#endif
-}
-
-/*-------------------------------------------------------------------------
- * endtmesh - postamble to triangle mesh
- *-------------------------------------------------------------------------
- */
-void
-Backend::endtmesh( void )
-{
-#ifndef NOWIREFRAME
-    if( ! wireframetris )
-        surfaceEvaluator.endtmesh();
-#else
-    surfaceEvaluator.endtmesh();
-/*    surfaceEvaluator.polymode( N_MESHFILL );*/
-#endif
-}
-
-
-/*-------------------------------------------------------------------------
- * bgnoutline - preamble to outlined rendering
- *-------------------------------------------------------------------------
- */
-void
-Backend::bgnoutline( void )
-{
-    surfaceEvaluator.bgnline();
-}
-
-/*-------------------------------------------------------------------------
- * linevert - evaluate a point on an outlined contour
- *-------------------------------------------------------------------------
- */
-void
-Backend::linevert( TrimVertex *t )
-{
-    surfaceEvaluator.evalcoord2f( t->nuid, t->param[0], t->param[1] );
-}
-
-/*-------------------------------------------------------------------------
- * linevert - evaluate a grid point of an outlined contour
- *-------------------------------------------------------------------------
- */
-void
-Backend::linevert( GridVertex *g )
-{
-    surfaceEvaluator.evalpoint2i( g->gparam[0], g->gparam[1] );
-}
-
-/*-------------------------------------------------------------------------
- * endoutline - postamble to outlined rendering
- *-------------------------------------------------------------------------
- */
-void
-Backend::endoutline( void )
-{
-    surfaceEvaluator.endline();
-}
-
-/*-------------------------------------------------------------------------
- * triangle - output a triangle 
- *-------------------------------------------------------------------------
- */
-void
-Backend::triangle( TrimVertex *a, TrimVertex *b, TrimVertex *c )
-{
-/*    bgntmesh( "spittriangle" );*/
-    bgntfan();
-    tmeshvert( a );
-    tmeshvert( b );
-    tmeshvert( c );
-    endtfan();
-/*    endtmesh();*/
-}
-
-void 
-Backend::bgncurv( void )
-{
-    curveEvaluator.bgnmap1f( 0 );
-}
-
-void
-Backend::segment( REAL ulo, REAL uhi )
-{
-    curveEvaluator.domain1f( ulo, uhi );
-} 
-
-void 
-Backend::curvpts( 
-    long type,		 	/* geometry, color, texture, normal */
-    REAL *pts, 			/* control points */
-    long stride, 		/* distance to next point */
-    int order,			/* parametric order */
-    REAL ulo,			/* lower parametric bound */
-    REAL uhi )			/* upper parametric bound */
-
-{
-    curveEvaluator.map1f( type, ulo, uhi, stride, order, pts );
-    curveEvaluator.enable( type );
-}
-
-void 
-Backend::curvgrid( REAL u0, REAL u1, long nu )
-{
-    curveEvaluator.mapgrid1f( nu, u0, u1 );
-}
-
-void 
-Backend::curvmesh( long from, long n )
-{
-    curveEvaluator.mapmesh1f( N_MESHFILL, from, from+n );
-}
-
-void 
-Backend::curvpt(REAL u)
-{
-    curveEvaluator.evalcoord1f( 0, u );
-}
-
-void 
-Backend::bgnline( void )		
-{
-    curveEvaluator.bgnline();
-}
-
-void 
-Backend::endline( void )
-{
-    curveEvaluator.endline();
-}
-
-void 
-Backend::endcurv( void )
-{
-    curveEvaluator.endmap1f();
-}
diff --git a/src/glu/sgi/libnurbs/internals/backend.h b/src/glu/sgi/libnurbs/internals/backend.h
deleted file mode 100644
index 6840cb19e92..00000000000
--- a/src/glu/sgi/libnurbs/internals/backend.h
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * backend.h
- *
- */
-
-#ifndef __glubackend_h_
-#define __glubackend_h_
-
-#include "trimvertex.h"
-#include "gridvertex.h"
-#include "gridtrimvertex.h"
-
-class BasicCurveEvaluator;
-class BasicSurfaceEvaluator;
-
-class Backend {
-private:
-    BasicCurveEvaluator&	curveEvaluator;
-    BasicSurfaceEvaluator&	surfaceEvaluator;
-public:
-  			Backend( BasicCurveEvaluator &c, BasicSurfaceEvaluator& e )
-			: curveEvaluator(c), surfaceEvaluator(e) {}
-
-    /* surface backend routines */
-    void		bgnsurf( int, int, long  );
-    void		patch( REAL, REAL, REAL, REAL );
-    void		surfpts( long, REAL *, long, long, int, int,
-          			 REAL, REAL, REAL, REAL );
-    void		surfbbox( long, REAL *, REAL * );
-    void		surfgrid( REAL, REAL, long, REAL, REAL, long ); 
-    void		surfmesh( long, long, long, long ); 
-    void		bgntmesh( const char * );
-    void		endtmesh( void );
-    void		swaptmesh( void );
-    void		tmeshvert( GridTrimVertex * );
-    void		tmeshvert( TrimVertex * );
-    void		tmeshvert( GridVertex * );
-    void		tmeshvert( REAL u,  REAL v );
-    void		linevert( TrimVertex * );
-    void		linevert( GridVertex * );
-    void		bgnoutline( void );
-    void		endoutline( void );
-    void		endsurf( void );
-    void		triangle( TrimVertex*, TrimVertex*, TrimVertex* );
-
-    void                bgntfan();
-    void                endtfan();
-    void                bgnqstrip();
-    void                endqstrip();
-    void                evalUStrip(int n_upper, REAL v_upper, REAL* upper_val, 
-				   int n_lower, REAL v_lower, REAL* lower_val
-				   );
-    void                evalVStrip(int n_left, REAL u_left, REAL* left_val, 
-				   int n_right, REAL v_right, REAL* right_val
-				   );
-    void                tmeshvertNOGE(TrimVertex *t);
-    void                tmeshvertNOGE_BU(TrimVertex *t);
-    void                tmeshvertNOGE_BV(TrimVertex *t);
-    void                preEvaluateBU(REAL u);
-    void                preEvaluateBV(REAL v);
-	
-
-    /* curve backend routines */
-    void		bgncurv( void );
-    void		segment( REAL, REAL );
-    void		curvpts( long, REAL *, long, int, REAL, REAL );
-    void		curvgrid( REAL, REAL, long );
-    void		curvmesh( long, long );
-    void		curvpt( REAL  );  
-    void		bgnline( void );
-    void		endline( void );
-    void		endcurv( void );
-private:
-#ifndef NOWIREFRAME
-    int			wireframetris;
-    int			wireframequads;
-    int			npts;
-    REAL		mesh[3][4];
-    int			meshindex;
-#endif
-};
-
-#endif /* __glubackend_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/basiccrveval.cc b/src/glu/sgi/libnurbs/internals/basiccrveval.cc
deleted file mode 100644
index cc473e4c2a1..00000000000
--- a/src/glu/sgi/libnurbs/internals/basiccrveval.cc
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * basiccrveval.c++
- *
- */
-
-#include "mystdio.h"
-#include "types.h"
-#include "basiccrveval.h"
-
-void
-BasicCurveEvaluator::domain1f( REAL, REAL )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "domain1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::range1f( long , REAL *, REAL * )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "range1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::enable( long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "enable\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::disable( long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "disable\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::bgnmap1f( long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgnmap1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::map1f( long, REAL, REAL, long, long, REAL * )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "map1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::mapgrid1f( long, REAL, REAL )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "mapgrid1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::mapmesh1f( long, long, long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "mapmesh1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::evalcoord1f( long, REAL )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "evalcoord1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::endmap1f( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endmap1f\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::bgnline( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgnline\n" );
-#endif
-}
-
-void
-BasicCurveEvaluator::endline( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endline\n" );
-#endif
-}
diff --git a/src/glu/sgi/libnurbs/internals/basiccrveval.h b/src/glu/sgi/libnurbs/internals/basiccrveval.h
deleted file mode 100644
index 277dc8dc967..00000000000
--- a/src/glu/sgi/libnurbs/internals/basiccrveval.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * basiccurveeval.h
- *
- */
-
-#ifndef __glubasiccrveval_h_
-#define __glubasiccrveval_h_
-
-#include "types.h"
-#include "displaymode.h"
-#include "cachingeval.h"
-
-class BasicCurveEvaluator : public CachingEvaluator {
-public:
-    virtual             ~BasicCurveEvaluator() { /* silence warning*/ }
-    virtual void	domain1f( REAL, REAL );
-    virtual void	range1f( long, REAL *, REAL * );
-
-    virtual void	enable( long );
-    virtual void	disable( long );
-    virtual void	bgnmap1f( long );
-    virtual void	map1f( long, REAL, REAL, long, long, REAL * );
-    virtual void	mapgrid1f( long, REAL, REAL );
-    virtual void	mapmesh1f( long, long, long );
-    virtual void	evalcoord1f( long, REAL );
-    virtual void	endmap1f( void );
-
-    virtual void	bgnline( void );
-    virtual void	endline( void );
-};
-
-#endif /* __glubasiccrveval_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/basicsurfeval.cc b/src/glu/sgi/libnurbs/internals/basicsurfeval.cc
deleted file mode 100644
index fad5dd0ada3..00000000000
--- a/src/glu/sgi/libnurbs/internals/basicsurfeval.cc
+++ /dev/null
@@ -1,232 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * basicsurfaceevaluator.c++
- *
- */
-
-#include "mystdio.h"
-#include "types.h"
-#include "basicsurfeval.h"
-
-#ifdef __WATCOMC__
-#pragma warning 726 10
-#endif
-
-void
-BasicSurfaceEvaluator::domain2f( REAL, REAL, REAL, REAL )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "domain2f\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::polymode( long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "polymode\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::range2f( long type, REAL *from, REAL *to )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "range2f type %ld, from (%g,%g), to (%g,%g)\n",
-		type, from[0], from[1], to[0], to[1] );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::enable( long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "enable\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::disable( long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "disable\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::bgnmap2f( long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgnmap2f\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::endmap2f( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endmap2f\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::map2f( long, REAL, REAL, long, long,
-				    REAL, REAL, long, long,
-			      REAL * )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "map2f\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::mapgrid2f( long, REAL, REAL, long, REAL, REAL )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "mapgrid2f\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::mapmesh2f( long, long, long, long, long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "mapmesh2f\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::evalcoord2f( long, REAL, REAL )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "evalcoord2f\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::evalpoint2i( long, long )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "evalpoint2i\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::bgnline( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgnline\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::endline( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endline\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::bgnclosedline( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgnclosedline\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::endclosedline( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endclosedline\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::bgntfan( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgntfan\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::endtfan( void )
-{
-}
-
-
-void
-BasicSurfaceEvaluator::bgntmesh( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgntmesh\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::swaptmesh( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "swaptmesh\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::endtmesh( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endtmesh\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::bgnqstrip( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "bgnqstrip\n" );
-#endif
-}
-
-void
-BasicSurfaceEvaluator::endqstrip( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endqstrip\n" );
-#endif
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/basicsurfeval.h b/src/glu/sgi/libnurbs/internals/basicsurfeval.h
deleted file mode 100644
index 8fe18a67fb0..00000000000
--- a/src/glu/sgi/libnurbs/internals/basicsurfeval.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * basicsurfeval.h
- *
- */
-
-#ifndef __glubasicsurfeval_h_
-#define __glubasicsurfeval_h_
-
-#include "types.h"
-#include "displaymode.h"
-#include "cachingeval.h"
-
-class BasicSurfaceEvaluator : public CachingEvaluator {
-public:
-    virtual             ~BasicSurfaceEvaluator() { /* silence warning*/ }
-    virtual void	range2f( long, REAL *, REAL * );
-    virtual void	domain2f( REAL, REAL, REAL, REAL );
-
-    virtual void	enable( long );
-    virtual void	disable( long );
-    virtual void	bgnmap2f( long );
-    virtual void	map2f( long, REAL, REAL, long, long, 
-				     REAL, REAL, long, long, 
-				     REAL *  );
-    virtual void	mapgrid2f( long, REAL, REAL, long,  REAL, REAL );
-    virtual void	mapmesh2f( long, long, long, long, long );
-    virtual void	evalcoord2f( long, REAL, REAL );
-    virtual void	evalpoint2i( long, long );
-    virtual void	endmap2f( void );
-
-    virtual void	polymode( long );
-    virtual void 	bgnline( void );
-    virtual void 	endline( void );
-    virtual void 	bgnclosedline( void );
-    virtual void 	endclosedline( void );
-    virtual void 	bgntmesh( void );
-    virtual void 	swaptmesh( void );
-    virtual void 	endtmesh( void );
-    virtual void 	bgnqstrip( void );
-    virtual void 	endqstrip( void );
-
-    virtual void 	bgntfan( void );
-    virtual void 	endtfan( void );
-
-    virtual void        evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
-				     int n_lower, REAL v_lower, REAL* lower_val
-      ) = 0;
-
-    virtual void        evalVStrip(int n_left, REAL u_left, REAL* left_val,
-				     int n_right, REAL u_right, REAL* right_val
-      ) = 0;
-    virtual void        inDoEvalCoord2NOGE(REAL u, REAL v, REAL* ret_point, REAL* ret_normal) = 0;
-    virtual void        inDoEvalCoord2NOGE_BU(REAL u, REAL v, REAL* ret_point, REAL* ret_normal) = 0;
-    virtual void        inDoEvalCoord2NOGE_BV(REAL u, REAL v, REAL* ret_point, REAL* ret_normal) = 0;
-    virtual void inPreEvaluateBV_intfac(REAL v ) = 0;
-    virtual void inPreEvaluateBU_intfac(REAL u ) = 0;
-    
-};
-
-#endif /* __glubasicsurfeval_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/bezierarc.h b/src/glu/sgi/libnurbs/internals/bezierarc.h
deleted file mode 100644
index 4acfb094881..00000000000
--- a/src/glu/sgi/libnurbs/internals/bezierarc.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * bezierarc.h
- *
- */
-
-#ifndef __glubezierarc_h
-#define __glubezierarc_h
-
-#include "myassert.h"
-
-class Mapdesc;
-
-struct BezierArc : public PooledObj { /* a bezier arc */
-    REAL *		cpts;		/* control points of arc */
-    int			order;		/* order of arc */
-    int			stride;		/* REAL distance between points */
-    long		type;		/* curve type */
-    Mapdesc *		mapdesc;
-};
-
-#endif /* __glubezierarc_h */
diff --git a/src/glu/sgi/libnurbs/internals/bin.cc b/src/glu/sgi/libnurbs/internals/bin.cc
deleted file mode 100644
index d85bd80dc8b..00000000000
--- a/src/glu/sgi/libnurbs/internals/bin.cc
+++ /dev/null
@@ -1,167 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * bin.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "bin.h"
-
-/*----------------------------------------------------------------------------
- * Constructor and destructor
- *----------------------------------------------------------------------------
- */
-Bin::Bin()
-{
-    head = NULL;
-    current = NULL;
-}
-
-Bin::~Bin()
-{
-    assert( head == NULL);
-}
-
-/*----------------------------------------------------------------------------
- * remove_this_arc - remove given Arc_ptr from bin
- *----------------------------------------------------------------------------
- */
-
-void 
-Bin::remove_this_arc( Arc_ptr arc )
-{
-    Arc_ptr *j;
-    for( j = &(head); (*j != 0) && (*j != arc); j = &((*j)->link) );
-
-    if( *j != 0 ) {
-        if( *j == current )
-	    current = (*j)->link;
-	*j = (*j)->link;
-    }
-}
-
-/*----------------------------------------------------------------------------
- * numarcs - count number of arcs in bin
- *----------------------------------------------------------------------------
- */
-
-int
-Bin::numarcs()
-{
-    long count = 0;
-    for( Arc_ptr jarc = firstarc(); jarc; jarc = nextarc() )
-	count++;
-    return count;
-}
-
-/*----------------------------------------------------------------------------
- * adopt - place an orphaned arcs into their new parents bin
- *----------------------------------------------------------------------------
- */
-
-void 
-Bin::adopt()
-{
-    markall();
-
-    Arc_ptr orphan;
-    while( (orphan = removearc()) != NULL ) {
-	for( Arc_ptr parent = orphan->next; parent != orphan; parent = parent->next ) {
-	    if (! parent->ismarked() ) {
-		orphan->link = parent->link;
-		parent->link = orphan;
-		orphan->clearmark();
-		break;
-	    }
-	}
-    }
-}
-
-
-/*----------------------------------------------------------------------------
- * show - print out descriptions of the arcs in the bin
- *----------------------------------------------------------------------------
- */
-
-void
-Bin::show( const char *name )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "%s\n", name );
-    for( Arc_ptr jarc = firstarc(); jarc; jarc = nextarc() )
-        jarc->show( );
-#endif
-}
-
-
-
-/*----------------------------------------------------------------------------
- * markall - mark all arcs with an identifying tag
- *----------------------------------------------------------------------------
- */
-
-void 
-Bin::markall()
-{
-    for( Arc_ptr jarc=firstarc(); jarc; jarc=nextarc() )
-	jarc->setmark();
-}
-
-/*----------------------------------------------------------------------------
- * listBezier - print out all arcs that are untessellated border arcs
- *----------------------------------------------------------------------------
- */
-
-void 
-Bin::listBezier( void )
-{
-    for( Arc_ptr jarc=firstarc(); jarc; jarc=nextarc() ) {
-	if( jarc->isbezier( ) ) {
-    	    assert( jarc->pwlArc->npts == 2 );	
-#ifndef NDEBUG
-	    TrimVertex  *pts = jarc->pwlArc->pts;
-    	    REAL s1 = pts[0].param[0];
-    	    REAL t1 = pts[0].param[1];
-    	    REAL s2 = pts[1].param[0];
-    	    REAL t2 = pts[1].param[1];
-	   _glu_dprintf( "arc (%g,%g) (%g,%g)\n", s1, t1, s2, t2 );
-#endif
-	}
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/bin.h b/src/glu/sgi/libnurbs/internals/bin.h
deleted file mode 100644
index dd0f878f60e..00000000000
--- a/src/glu/sgi/libnurbs/internals/bin.h
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * bin.h
- *
- */
-
-#ifndef __glubin_h_
-#define __glubin_h_
-
-#include "myassert.h"
-#include "arc.h"
-#include "defines.h"
-
-class Bin 
-{ /* a linked list of jordan arcs */
-private:
-    Arc_ptr head;/*first arc on list */
-    Arc_ptr		current;	/* current arc on list */
-public:
-    			Bin();
-			~Bin();
-    inline Arc_ptr	firstarc( void );
-    inline Arc_ptr	nextarc( void );
-    inline Arc_ptr	removearc( void );
-    inline int		isnonempty( void ) { return (head ? 1 : 0); }
-    inline void		addarc( Arc_ptr );
-    void 		remove_this_arc( Arc_ptr );
-    int			numarcs( void );
-    void 		adopt( void );
-    void		markall( void );
-    void		show( const char * );
-    void		listBezier( void );
-};
-
-/*----------------------------------------------------------------------------
- * Bin::addarc - add an Arc_ptr to head of linked list of Arc_ptr
- *----------------------------------------------------------------------------
- */
-
-inline void
-Bin::addarc( Arc_ptr jarc )
-{
-   jarc->link = head;
-   head = jarc;
-}
-
-/*----------------------------------------------------------------------------
- * Bin::removearc - remove first Arc_ptr from bin
- *----------------------------------------------------------------------------
- */
-
-inline Arc_ptr
-Bin::removearc( void )
-{
-    Arc_ptr jarc = head;
-
-    if( jarc ) head = jarc->link;
-    return jarc;
-}
-
-
-/*----------------------------------------------------------------------------
- * BinIter::nextarc - return current arc in bin and advance pointer to next arc
- *----------------------------------------------------------------------------
- */
-
-inline Arc_ptr
-Bin::nextarc( void )
-{
-    Arc_ptr jarc = current;
-
-#ifdef DEBUG
-    assert( jarc->check() != 0 );
-#endif
-
-    if( jarc ) current = jarc->link;
-    return jarc;
-}
-
-/*----------------------------------------------------------------------------
- * BinIter::firstarc - set current arc to first arc of bin advance to next arc
- *----------------------------------------------------------------------------
- */
-
-inline Arc_ptr
-Bin::firstarc( void )
-{
-    current = head;
-    return nextarc( );
-}
-
-#endif /* __glubin_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/bufpool.cc b/src/glu/sgi/libnurbs/internals/bufpool.cc
deleted file mode 100644
index 53ac1a5695d..00000000000
--- a/src/glu/sgi/libnurbs/internals/bufpool.cc
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- *  bufpool.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "bufpool.h"
-
-
-/*-----------------------------------------------------------------------------
- * Pool - allocate a new pool of buffers
- *-----------------------------------------------------------------------------
- */
-Pool::Pool( int _buffersize, int initpoolsize, const char *n )
-{
-    if((unsigned)_buffersize < sizeof(Buffer))
-        buffersize = sizeof(Buffer);
-    else
-        buffersize = _buffersize;
-    initsize	= initpoolsize * buffersize;
-    nextsize	= initsize;
-    name	= n;
-    magic	= is_allocated;
-    nextblock	= 0;
-    curblock	= 0;
-    freelist	= 0;
-    nextfree	= 0;
-    for (int i = 0; i < NBLOCKS; i++) {
-        blocklist[i] = 0;
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * ~Pool - free a pool of buffers and the pool itself
- *-----------------------------------------------------------------------------
- */
-
-Pool::~Pool( void )
-{
-    assert( (this != 0) && (magic == is_allocated) );
-
-    while( nextblock ) {
-	delete [] blocklist[--nextblock];
-        blocklist[nextblock] = 0;
-    }
-    magic = is_free;
-}
-
-
-void Pool::grow( void )
-{
-    assert( (this != 0) && (magic == is_allocated) );
-    curblock = new char[nextsize];
-    blocklist[nextblock++] = curblock;
-    nextfree = nextsize;
-    nextsize *= 2;
-}
-
-/*-----------------------------------------------------------------------------
- * Pool::clear - free buffers associated with pool but keep pool 
- *-----------------------------------------------------------------------------
- */
-
-void 
-Pool::clear( void )
-{
-    assert( (this != 0) && (magic == is_allocated) );
-
-    while( nextblock ) {
-	delete [] blocklist[--nextblock];
-	blocklist[nextblock] = 0;
-    }
-    curblock	= 0;
-    freelist	= 0;
-    nextfree	= 0;
-    if( nextsize > initsize )
-        nextsize /= 2;
-}
diff --git a/src/glu/sgi/libnurbs/internals/bufpool.h b/src/glu/sgi/libnurbs/internals/bufpool.h
deleted file mode 100644
index 0fa9433750c..00000000000
--- a/src/glu/sgi/libnurbs/internals/bufpool.h
+++ /dev/null
@@ -1,141 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * bufpool.h
- *
- */
-
-#ifndef __glubufpool_h_
-#define __glubufpool_h_
-
-#include "gluos.h"
-#include "myassert.h"
-#include "mystdlib.h"
-
-#define NBLOCKS	32
-
-class Buffer {
-	friend class 	Pool;
-	Buffer	*	next;		/* next buffer on free list	*/
-};
-
-class Pool {
-public:
-			Pool( int, int, const char * );
-			~Pool( void );
-    inline void*	new_buffer( void );
-    inline void		free_buffer( void * );
-    void		clear( void );
-    
-private:
-    void		grow( void );
-
-protected:
-    Buffer		*freelist;		/* linked list of free buffers */
-    char		*blocklist[NBLOCKS];	/* blocks of malloced memory */
-    int			nextblock;		/* next free block index */
-    char		*curblock;		/* last malloced block */
-    int			buffersize;		/* bytes per buffer */
-    int			nextsize;		/* size of next block of memory	*/
-    int			nextfree;		/* byte offset past next free buffer */
-    int			initsize;
-    enum Magic { is_allocated = 0xf3a1, is_free = 0xf1a2 };
-    const char		*name;			/* name of the pool */
-    Magic		magic;			/* marker for valid pool */
-};
-
-/*-----------------------------------------------------------------------------
- * Pool::free_buffer - return a buffer to a pool
- *-----------------------------------------------------------------------------
- */
-
-inline void
-Pool::free_buffer( void *b )
-{
-    assert( (this != 0) && (magic == is_allocated) );
-
-    /* add buffer to singly connected free list */
-
-    ((Buffer *) b)->next = freelist;
-    freelist = (Buffer *) b;
-}
-
-
-/*-----------------------------------------------------------------------------
- * Pool::new_buffer - allocate a buffer from a pool
- *-----------------------------------------------------------------------------
- */
-
-inline void * 
-Pool::new_buffer( void )
-{
-    void *buffer;
-
-    assert( (this != 0) && (magic == is_allocated) );
-
-    /* find free buffer */
-
-    if( freelist ) {
-    	buffer = (void *) freelist; 
-    	freelist = freelist->next;
-    } else {
-    	if( ! nextfree )
-    	    grow( );
-    	nextfree -= buffersize;;
-    	buffer = (void *) (curblock + nextfree);
-    }
-    return buffer;
-}
-	
-class PooledObj {
-public:
-    inline void *	operator new( size_t, Pool & );
-    inline void * 	operator new( size_t, void *);
-    inline void * 	operator new( size_t s)
-				{ return ::new char[s]; }
-    inline void 	operator delete( void * ) { assert( 0 ); }
-    inline void         operator delete( void *, Pool & ) { assert( 0 ); }
-    inline void		deleteMe( Pool & );
-};
-
-inline void *
-PooledObj::operator new( size_t, Pool& pool )
-{
-    return pool.new_buffer();
-}
-
-inline void
-PooledObj::deleteMe( Pool& pool )
-{
-    pool.free_buffer( (void *) this );
-}
-
-#endif /* __glubufpool_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/cachingeval.cc b/src/glu/sgi/libnurbs/internals/cachingeval.cc
deleted file mode 100644
index 3fab38c1064..00000000000
--- a/src/glu/sgi/libnurbs/internals/cachingeval.cc
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * cachingeval.c++
- *
- */
-
-#include "cachingeval.h"
-
-int
-CachingEvaluator::canRecord( void )
-{
-    return 0;
-}
-
-int
-CachingEvaluator::canPlayAndRecord( void )
-{
-    return 0;
-}
-
-int
-CachingEvaluator::createHandle( int )
-{
-    return 0;
-}
-
-void
-CachingEvaluator::beginOutput( ServiceMode, int )
-{
-}
-
-void
-CachingEvaluator::endOutput( void )
-{
-} 
-
-void
-CachingEvaluator::discardRecording( int )
-{
-}
-
-void
-CachingEvaluator::playRecording( int )
-{
-}
diff --git a/src/glu/sgi/libnurbs/internals/cachingeval.h b/src/glu/sgi/libnurbs/internals/cachingeval.h
deleted file mode 100644
index b390067a281..00000000000
--- a/src/glu/sgi/libnurbs/internals/cachingeval.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * cachingeval.h
- *
- */
-
-#ifndef __glucachingval_h_
-#define __glucachingval_h_
-
-class CachingEvaluator {
-public:
-    virtual             ~CachingEvaluator() { /* silence warning*/ }
-    enum ServiceMode 	{ play, record, playAndRecord };
-    virtual int		canRecord( void );
-    virtual int		canPlayAndRecord( void );
-    virtual int		createHandle( int handle );
-    virtual void	beginOutput( ServiceMode, int handle );
-    virtual void	endOutput( void ); 
-    virtual void	discardRecording( int handle );
-    virtual void	playRecording( int handle );
-};
-#endif /* __glucachingval_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/ccw.cc b/src/glu/sgi/libnurbs/internals/ccw.cc
deleted file mode 100644
index eb01b7781a7..00000000000
--- a/src/glu/sgi/libnurbs/internals/ccw.cc
+++ /dev/null
@@ -1,565 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * ccw.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "subdivider.h"
-#include "types.h"
-#include "arc.h"
-#include "trimvertex.h"
-#include "simplemath.h"
-
-inline int 
-Subdivider::bbox( TrimVertex *a, TrimVertex *b, TrimVertex *c, int p )
-{
-    return bbox( a->param[p], b->param[p], c->param[p], 
-	         a->param[1-p], b->param[1-p], c->param[1-p] ); 
-}
-
-int
-Subdivider::ccwTurn_sr( Arc_ptr j1, Arc_ptr j2 ) // dir = 1
-{
-    register TrimVertex *v1	= &j1->pwlArc->pts[j1->pwlArc->npts-1];
-    register TrimVertex *v1last	= &j1->pwlArc->pts[0];
-    register TrimVertex *v2	= &j2->pwlArc->pts[0];
-    register TrimVertex *v2last	= &j2->pwlArc->pts[j2->pwlArc->npts-1];
-    register TrimVertex *v1next	= v1-1;
-    register TrimVertex *v2next	= v2+1;
-    int sgn;
-
-    assert( v1 != v1last );
-    assert( v2 != v2last );
-
-#ifndef NDEBUG
-    _glu_dprintf( "arc_ccw_turn, p = %d\n", 0 );
-#endif
-
-    // the arcs lie on the line (0 == v1->param[0])
-    if( v1->param[0] == v1next->param[0] && v2->param[0] == v2next->param[0] )
-	return 0;
-
-    if( v2next->param[0] < v2->param[0] || v1next->param[0] < v1->param[0] )
-	::mylongjmp( jumpbuffer, 28 );
-
-    if( v1->param[1] < v2->param[1] )
-	return 0;
-    else if( v1->param[1] > v2->param[1] )
-	return 1;
-
-    while( 1 ) {
-	if( v1next->param[0] < v2next->param[0] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case a\n" );
-#endif
-	    assert( v1->param[0] <= v1next->param[0] );
-	    assert( v2->param[0] <= v1next->param[0] );
-	    switch( bbox( v2, v2next, v1next, 1 ) ) {
-		case -1:
-		    return 0;
-		case 0:
-		   sgn = ccw( v1next, v2, v2next );
-		   if( sgn != -1 ) {
-			return sgn;
-		   } else {
-#ifdef DEBUG
-			_glu_dprintf( "decr\n" );
-#endif
-			v1 = v1next--;
-			if( v1 == v1last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 1;
-	    }
-	} else if( v1next->param[0] > v2next->param[0] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case b\n" );
-#endif
-	    assert( v1->param[0] <= v2next->param[0] );
-	    assert( v2->param[0] <= v2next->param[0] );
-	    switch( bbox( v1, v1next, v2next, 1 ) ) {
-		case -1:
-		    return 1;
-		case 0:
-		   sgn = ccw( v1next, v1, v2next );
-		   if( sgn != -1 ) { 
-			return sgn;
-		   } else {
-#ifdef DEBUG
-			_glu_dprintf( "incr\n" );
-#endif
-			v2 = v2next++;
-			if( v2 == v2last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 0;
-	    }
-	} else {
-#ifndef NDEBUG
-	    _glu_dprintf( "case ab\n" );
-#endif
-	    if( v1next->param[1] < v2next->param[1] )
-		return 0;
-	    else if( v1next->param[1] > v2next->param[1] )
-		return 1;
-	    else {
-#ifdef DEBUG
-		_glu_dprintf( "incr\n" );
-#endif
-		v2 = v2next++;
-		if( v2 == v2last ) {
-#ifdef DEBUG
-		    _glu_dprintf( "no good results\n" );
-#endif
-		    return 0; // ill-conditioned, guess answer
-		}
-	    }
-	}
-    }
-}
-
-int
-Subdivider::ccwTurn_sl( Arc_ptr j1, Arc_ptr j2 ) // dir = 0
-{
-    register TrimVertex *v1	= &j1->pwlArc->pts[j1->pwlArc->npts-1];
-    register TrimVertex *v1last	= &j1->pwlArc->pts[0];
-    register TrimVertex *v2	= &j2->pwlArc->pts[0];
-    register TrimVertex *v2last	= &j2->pwlArc->pts[j2->pwlArc->npts-1];
-    register TrimVertex *v1next	= v1-1;
-    register TrimVertex *v2next	= v2+1;
-    int sgn;
-
-    assert( v1 != v1last );
-    assert( v2 != v2last );
-
-#ifndef NDEBUG
-    _glu_dprintf( "arc_ccw_turn, p = %d\n", 0 );
-#endif
-
-    // the arcs lie on the line (0 == v1->param[0])
-    if( v1->param[0] == v1next->param[0] && v2->param[0] == v2next->param[0] )
-	return 0;
-
-    if( v2next->param[0] > v2->param[0] || v1next->param[0] > v1->param[0] ) 
-	::mylongjmp( jumpbuffer, 28 );
-
-    if( v1->param[1] < v2->param[1] )
-	return 1;
-    else if( v1->param[1] > v2->param[1] )
-	return 0;
-
-    while( 1 ) {
-	if( v1next->param[0] > v2next->param[0] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case c\n" );
-#endif
-	    assert( v1->param[0] >= v1next->param[0] );
-	    assert( v2->param[0] >= v1next->param[0] );
-	    switch( bbox( v2next, v2, v1next, 1 ) ) {
-		case -1:
-		    return 1;
-		case 0:
-		    sgn = ccw( v1next, v2, v2next );
-		    if( sgn != -1 ) 
-			return sgn;
-		    else {
-			v1 = v1next--;
-#ifdef DEBUG
-			_glu_dprintf( "decr\n" );
-#endif
-			if( v1 == v1last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 0;
-	    }
-	} else if( v1next->param[0] < v2next->param[0] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case d\n" );
-#endif
-	    assert( v1->param[0] >= v2next->param[0] );
-	    assert( v2->param[0] >= v2next->param[0] );
-	    switch( bbox( v1next, v1, v2next, 1 ) ) {
-		case -1:
-		    return 0;
-		case 0:
-		    sgn = ccw( v1next, v1, v2next );
-		    if( sgn != -1 ) 
-			return sgn;
-		    else {
-			v2 = v2next++;
-#ifdef DEBUG
-			_glu_dprintf( "incr\n" );
-#endif
-			if( v2 == v2last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 1;
-	    }
-	} else {
-#ifdef DEBUG
-	    _glu_dprintf( "case cd\n" );
-#endif
-	    if( v1next->param[1] < v2next->param[1] )
-		return 1;
-	    else if( v1next->param[1] > v2next->param[1] )
-		return 0;
-	    else {
-		v2 = v2next++;
-#ifdef DEBUG
-		_glu_dprintf( "incr\n" );
-#endif
-		if( v2 == v2last ) {
-#ifdef DEBUG
-		    _glu_dprintf( "no good results\n" );
-#endif
-		    return 0; // ill-conditioned, guess answer
-		}
-	    }
-	}
-    }
-}
-
-int
-Subdivider::ccwTurn_tr( Arc_ptr j1, Arc_ptr j2 ) // dir = 1
-{
-    register TrimVertex *v1	= &j1->pwlArc->pts[j1->pwlArc->npts-1];
-    register TrimVertex *v1last	= &j1->pwlArc->pts[0];
-    register TrimVertex *v2	= &j2->pwlArc->pts[0];
-    register TrimVertex *v2last	= &j2->pwlArc->pts[j2->pwlArc->npts-1];
-    register TrimVertex *v1next	= v1-1;
-    register TrimVertex *v2next	= v2+1;
-    int sgn;
-
-    assert( v1 != v1last );
-    assert( v2 != v2last );
-
-#ifndef NDEBUG
-    _glu_dprintf( "arc_ccw_turn, p = %d\n", 1 );
-#endif
-
-    // the arcs lie on the line (1 == v1->param[1])
-    if( v1->param[1] == v1next->param[1] && v2->param[1] == v2next->param[1] )
-	return 0;
-
-    if( v2next->param[1] < v2->param[1] || v1next->param[1] < v1->param[1] )
-	::mylongjmp( jumpbuffer, 28 );
-
-    if( v1->param[0] < v2->param[0] )
-	return 1;
-    else if( v1->param[0] > v2->param[0] )
-	return 0;
-
-    while( 1 ) {
-	if( v1next->param[1] < v2next->param[1] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case a\n" );
-#endif
-	    assert( v1->param[1] <= v1next->param[1] );
-	    assert( v2->param[1] <= v1next->param[1] );
-	    switch( bbox( v2, v2next, v1next, 0 ) ) {
-		case -1:
-		    return 1;
-		case 0:
-		   sgn = ccw( v1next, v2, v2next );
-		   if( sgn != -1 ) {
-			return sgn;
-		   } else {
-#ifdef DEBUG
-			_glu_dprintf( "decr\n" );
-#endif
-			v1 = v1next--;
-			if( v1 == v1last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 0;
-	    }
-	} else if( v1next->param[1] > v2next->param[1] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case b\n" );
-#endif
-	    assert( v1->param[1] <= v2next->param[1] );
-	    assert( v2->param[1] <= v2next->param[1] );
-	    switch( bbox( v1, v1next, v2next, 0 ) ) {
-		case -1:
-		    return 0;
-		case 0:
-		   sgn = ccw( v1next, v1, v2next );
-		   if( sgn != -1 ) { 
-			return sgn;
-		   } else {
-#ifdef DEBUG
-			_glu_dprintf( "incr\n" );
-#endif
-			v2 = v2next++;
-			if( v2 == v2last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 1;
-	    }
-	} else {
-#ifdef DEBUG
-	    _glu_dprintf( "case ab\n" );
-#endif
-	    if( v1next->param[0] < v2next->param[0] )
-		return 1;
-	    else if( v1next->param[0] > v2next->param[0] )
-		return 0;
-	    else {
-#ifdef DEBUG
-		_glu_dprintf( "incr\n" );
-#endif
-		v2 = v2next++;
-		if( v2 == v2last ) {
-#ifdef DEBUG
-		    _glu_dprintf( "no good results\n" );
-#endif
-		    return 0; // ill-conditioned, guess answer
-		}
-	    }
-	}
-    }
-}
-
-int
-Subdivider::ccwTurn_tl( Arc_ptr j1, Arc_ptr j2 )
-{
-    register TrimVertex *v1	= &j1->pwlArc->pts[j1->pwlArc->npts-1];
-    register TrimVertex *v1last	= &j1->pwlArc->pts[0];
-    register TrimVertex *v2	= &j2->pwlArc->pts[0];
-    register TrimVertex *v2last	= &j2->pwlArc->pts[j2->pwlArc->npts-1];
-    register TrimVertex *v1next	= v1-1;
-    register TrimVertex *v2next	= v2+1;
-    int sgn;
-
-    assert( v1 != v1last );
-    assert( v2 != v2last );
-
-#ifndef NDEBUG
-    _glu_dprintf( "arc_ccw_turn, p = %d\n", 1 );
-#endif
-
-    // the arcs lie on the line (1 == v1->param[1])
-    if( v1->param[1] == v1next->param[1] && v2->param[1] == v2next->param[1] )
-	return 0;
-
-    if( v2next->param[1] > v2->param[1] || v1next->param[1] > v1->param[1] ) 
-	::mylongjmp( jumpbuffer, 28 );
-
-    if( v1->param[0] < v2->param[0] )
-	return 0;
-    else if( v1->param[0] > v2->param[0] )
-	return 1;
-
-    while( 1 ) {
-	if( v1next->param[1] > v2next->param[1] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case c\n" );
-#endif
-	    assert( v1->param[1] >= v1next->param[1] );
-	    assert( v2->param[1] >= v1next->param[1] );
-	    switch( bbox( v2next, v2, v1next, 0 ) ) {
-		case -1:
-		    return 0;
-		case 0:
-		    sgn = ccw( v1next, v2, v2next );
-		    if( sgn != -1 ) 
-			return sgn;
-		    else {
-			v1 = v1next--;
-#ifdef DEBUG
-			_glu_dprintf( "decr\n" );
-#endif
-			if( v1 == v1last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 1;
-	    }
-	} else if( v1next->param[1] < v2next->param[1] ) {
-#ifndef NDEBUG
-	    _glu_dprintf( "case d\n" );
-	    assert( v1->param[1] >= v2next->param[1] );
-	    assert( v2->param[1] >= v2next->param[1] );
-#endif
-	    switch( bbox( v1next, v1, v2next, 0 ) ) {
-		case -1:
-		    return 1;
-		case 0:
-		    sgn = ccw( v1next, v1, v2next );
-		    if( sgn != -1 ) 
-			return sgn;
-		    else {
-			v2 = v2next++;
-#ifdef DEBUG
-			_glu_dprintf( "incr\n" );
-#endif
-			if( v2 == v2last ) {
-#ifdef DEBUG
-			    _glu_dprintf( "no good results\n" );
-#endif
-			    return 0; // ill-conditioned, guess answer
-			}
-		    }
-		    break;
-		case 1:
-		    return 0;
-	    }
-	} else {
-#ifdef DEBUG
-	    _glu_dprintf( "case cd\n" );
-#endif
-	    if( v1next->param[0] < v2next->param[0] )
-		return 0;
-	    else if( v1next->param[0] > v2next->param[0] )
-		return 1;
-	    else {
-		v2 = v2next++;
-#ifdef DEBUG
-		_glu_dprintf( "incr\n" );
-#endif
-		if( v2 == v2last ) {
-#ifdef DEBUG
-		    _glu_dprintf( "no good results\n" );
-#endif
-		    return 0; // ill-conditioned, guess answer
-		}
-	    }
-	}
-    }
-}
-
-
-#ifndef NDEBUG
-int
-Subdivider::bbox( register REAL sa, register REAL sb, register REAL sc,
-      register REAL ta, register REAL tb, register REAL tc )
-#else
-int
-Subdivider::bbox( register REAL sa, register REAL sb, register REAL sc,
-      register REAL   , register REAL   , register REAL    )
-#endif
-{
-#ifndef NDEBUG
-    assert( tc >= ta );
-    assert( tc <= tb );
-#endif
-
-    if( sa < sb ) {
-	if( sc <= sa ) {
-	    return -1;
-	} else if( sb <= sc ) {
-	    return 1;
-	} else {
-	    return 0;
-	}
-    } else if( sa > sb ) {
-	if( sc >= sa ) {
-	    return 1;
-	} else if( sb >= sc ) {
-	    return -1;
-	} else {
-	    return 0;
-	}
-    } else {
-	if( sc > sa ) {
-	    return 1;
-	} else if( sb > sc ) {
-	    return -1;
-	} else {
-	    return 0;
-	}
-    }
-}
-
-/*----------------------------------------------------------------------------
- * ccw - determine how three points are oriented by computing their
- *	 determinant.  
- *	 Return 1 if the vertices are ccw oriented, 
- *		0 if they are cw oriented, or 
- *		-1 if the computation is ill-conditioned.
- *----------------------------------------------------------------------------
- */
-int
-Subdivider::ccw( TrimVertex *a, TrimVertex *b, TrimVertex *c )
-{
-    REAL d = det3( a, b, c );
-    if( glu_abs(d) < 0.0001 ) return -1;
-    return (d < 0.0) ? 0 : 1;
-}
diff --git a/src/glu/sgi/libnurbs/internals/coveandtiler.cc b/src/glu/sgi/libnurbs/internals/coveandtiler.cc
deleted file mode 100644
index ca5bf36b363..00000000000
--- a/src/glu/sgi/libnurbs/internals/coveandtiler.cc
+++ /dev/null
@@ -1,440 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * coveandtiler.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "coveandtiler.h"
-#include "gridvertex.h"
-#include "gridtrimvertex.h"
-#include "uarray.h"
-#include "backend.h"
-
-
-const int CoveAndTiler::MAXSTRIPSIZE = 1000;
-
-CoveAndTiler::CoveAndTiler( Backend& b )
-	    : backend( b )
-{ }
-
-CoveAndTiler::~CoveAndTiler( void )
-{ }
-
-inline void
-CoveAndTiler::output( GridVertex &gv )
-{
-    backend.tmeshvert( &gv );
-}
-
-inline void
-CoveAndTiler::output( TrimVertex *tv )
-{
-    backend.tmeshvert( tv );
-}
-
-inline void
-CoveAndTiler::output( GridTrimVertex& g )
-{
-    backend.tmeshvert( &g );
-}
-
-void
-CoveAndTiler::coveAndTile( void )
-{
-    long ustart = (top.ustart >= bot.ustart) ? top.ustart : bot.ustart;
-    long uend	= (top.uend <= bot.uend)     ? top.uend   : bot.uend;
-    if( ustart <= uend ) {
-	tile( bot.vindex, ustart, uend );
-	if( top.ustart >= bot.ustart )
-	    coveUpperLeft();
-	else
-	    coveLowerLeft();
-
-	if( top.uend <= bot.uend )
-	    coveUpperRight();
-	else
-	    coveLowerRight();
-    } else {
-	TrimVertex blv, tlv, *bl, *tl;
-	GridTrimVertex bllv, tllv;
-	TrimVertex *lf = left.first();
-	TrimVertex *ll = left.last();
-	if( lf->param[0] >= ll->param[0] ) {
-	    blv.param[0] = lf->param[0];
-	    blv.param[1] = ll->param[1];
-	    blv.nuid = 0; // XXX
-	    assert( blv.param[1] == bot.vval );
-	    bl = &blv;
-	    tl = lf;
-	    tllv.set( lf );
-	    if( ll->param[0] > uarray.uarray[top.ustart-1] ) {
-		bllv.set( ll );
-		assert( ll->param[0] <= uarray.uarray[bot.ustart] );
-	    } else {
-		bllv.set( top.ustart-1, bot.vindex );
-	    }
-	    coveUpperLeftNoGrid( bl );
-	} else {
-	    tlv.param[0] = ll->param[0];
-	    tlv.param[1] = lf->param[1];
-	    tlv.nuid = 0; // XXX
-	    assert( tlv.param[1] == top.vval );
-	    tl = &tlv;
-	    bl = ll;
-	    bllv.set( ll );
-	    if( lf->param[0] > uarray.uarray[bot.ustart-1] ) {
-		assert( lf->param[0] <= uarray.uarray[bot.ustart] );
-		tllv.set( lf );
-	    } else {
-		tllv.set( bot.ustart-1, top.vindex );
-	    }
-	    coveLowerLeftNoGrid( tl );
-	}
-
-	TrimVertex brv, trv, *br, *tr;
-	GridTrimVertex brrv, trrv;
-	TrimVertex *rf = right.first();
-	TrimVertex *rl = right.last();
-
-	if( rf->param[0] <= rl->param[0] ) {
-	    brv.param[0] = rf->param[0];
-	    brv.param[1] = rl->param[1];
-	    brv.nuid = 0; // XXX
-	    assert( brv.param[1] == bot.vval );
-	    br = &brv;
-	    tr = rf;
-	    trrv.set( rf );
-	    if( rl->param[0] < uarray.uarray[top.uend+1] ) {
-		assert( rl->param[0] >= uarray.uarray[top.uend] );
-		brrv.set( rl );
-	    } else {
-		brrv.set( top.uend+1, bot.vindex );
-	    }
-	    coveUpperRightNoGrid( br );
-	} else {
-	    trv.param[0] = rl->param[0];
-	    trv.param[1] = rf->param[1];
-	    trv.nuid = 0; // XXX
-	    assert( trv.param[1] == top.vval );
-	    tr = &trv;
-	    br = rl;
-	    brrv.set( rl );
-	    if( rf->param[0] < uarray.uarray[bot.uend+1] ) {
-		assert( rf->param[0] >= uarray.uarray[bot.uend] );
-		trrv.set( rf );
-	    } else {
-		trrv.set( bot.uend+1, top.vindex );
-	    }
-	    coveLowerRightNoGrid( tr );
-	}
-
-	backend.bgntmesh( "doit" );
-	output(trrv);
-	output(tllv);
-	output( tr );
-	output( tl );
-	output( br );
-	output( bl );
-	output(brrv);
-	output(bllv);
-	backend.endtmesh();
-    }
-}
-
-void
-CoveAndTiler::tile( long vindex, long ustart, long uend )
-{
-    long numsteps = uend - ustart;
-
-    if( numsteps == 0 ) return;
-
-    if( numsteps > MAXSTRIPSIZE ) {
-	long umid = ustart + (uend - ustart) / 2;
-	tile( vindex, ustart, umid );
-	tile( vindex, umid, uend );
-    } else {
-	backend.surfmesh( ustart, vindex-1, numsteps, 1 );
-    }
-}
-
-void
-CoveAndTiler::coveUpperRight( void )
-{
-    GridVertex tgv( top.uend, top.vindex );
-    GridVertex gv( top.uend, bot.vindex );
-
-    right.first();
-    backend.bgntmesh( "coveUpperRight" );
-    output( right.next() );
-    output( tgv );
-    backend.swaptmesh();
-    output( gv );
-	coveUR();
-    backend.endtmesh();
-}
-
-void
-CoveAndTiler::coveUpperRightNoGrid( TrimVertex* br )
-{
-    backend.bgntmesh( "coveUpperRight" );
-    output( right.first() );
-    output( right.next() );
-    backend.swaptmesh();
-    output( br );
-	coveUR();
-    backend.endtmesh();
-}
-
-void
-CoveAndTiler::coveUR( )
-{
-    GridVertex gv( top.uend, bot.vindex );
-    TrimVertex *vert = right.next();
-    if( vert == NULL ) return;
-
-    assert( vert->param[0] >= uarray.uarray[gv.gparam[0]]  );
-
-    if( gv.nextu() >= bot.uend ) {
-	for( ; vert; vert = right.next() ) {
-	    output( vert );
-	    backend.swaptmesh();
-	}
-    } else while( 1 ) {
-	if( vert->param[0] < uarray.uarray[gv.gparam[0]]  ) {
-	    output( vert );
-	    backend.swaptmesh();
-	    vert = right.next();
-	    if( vert == NULL ) break;
-	} else {
-	    backend.swaptmesh();
-	    output( gv );
-	    if( gv.nextu() == bot.uend ) {
-		for( ; vert; vert = right.next() ) {
-		    output( vert );
-		    backend.swaptmesh();
-		}
-		break;
-	    }
-	}
-    }
-}
-
-void
-CoveAndTiler::coveUpperLeft( void )
-{
-    GridVertex tgv( top.ustart, top.vindex );
-    GridVertex gv( top.ustart, bot.vindex );
-
-    left.first();
-    backend.bgntmesh( "coveUpperLeft" );
-    output( tgv );
-    output( left.next() );
-    output( gv );
-    backend.swaptmesh();
-	coveUL();
-    backend.endtmesh();
-}
-
-void
-CoveAndTiler::coveUpperLeftNoGrid( TrimVertex* bl )
-{
-    backend.bgntmesh( "coveUpperLeftNoGrid" );
-    output( left.first() );
-    output( left.next() );
-    output( bl );
-    backend.swaptmesh();
-	coveUL();
-    backend.endtmesh();
-}
-
-void
-CoveAndTiler::coveUL()
-{
-    GridVertex gv( top.ustart, bot.vindex );
-    TrimVertex *vert = left.next();
-    if( vert == NULL ) return;
-    assert( vert->param[0] <= uarray.uarray[gv.gparam[0]]  );
-
-    if( gv.prevu() <= bot.ustart ) {
-	for( ; vert; vert = left.next() ) {
-	    backend.swaptmesh();
-	    output( vert );
-	}
-    } else while( 1 ) {
-	if( vert->param[0] > uarray.uarray[gv.gparam[0]]  ) {
-	    backend.swaptmesh();
-	    output( vert );
-	    vert = left.next();
-	    if( vert == NULL ) break;
-	} else {
-	    output( gv );
-	    backend.swaptmesh();
-	    if( gv.prevu() == bot.ustart ) {
-		for( ; vert; vert = left.next() ) {
-		    backend.swaptmesh();
-		    output( vert );
-		}
-		break;
-	    }
-	}
-    }
-}
-
-void
-CoveAndTiler::coveLowerLeft( void )
-{
-    GridVertex bgv( bot.ustart, bot.vindex );
-    GridVertex gv( bot.ustart, top.vindex );
-
-    left.last();
-    backend.bgntmesh( "coveLowerLeft" );
-    output( left.prev() );
-    output( bgv );
-    backend.swaptmesh();
-    output( gv );
-	coveLL();
-    backend.endtmesh();
-}
-
-void
-CoveAndTiler::coveLowerLeftNoGrid( TrimVertex* tl )
-{
-    backend.bgntmesh( "coveLowerLeft" );
-    output( left.last() );
-    output( left.prev() );
-    backend.swaptmesh();
-    output( tl );
-	coveLL( );
-    backend.endtmesh();
-}
-
-void
-CoveAndTiler::coveLL()
-{
-    GridVertex gv( bot.ustart, top.vindex );
-    TrimVertex *vert = left.prev();
-    if( vert == NULL ) return;
-    assert( vert->param[0] <= uarray.uarray[gv.gparam[0]]  );
-
-    if( gv.prevu() <= top.ustart ) {
-	for( ; vert; vert = left.prev() ) {
-	    output( vert );
-	    backend.swaptmesh();
-	}
-    } else while( 1 ) {
-	if( vert->param[0] > uarray.uarray[gv.gparam[0]] ){
-	    output( vert );
-	    backend.swaptmesh();
-	    vert = left.prev();
-	    if( vert == NULL ) break;
-	} else {
-	    backend.swaptmesh();
-	    output( gv );
-	    if( gv.prevu() == top.ustart ) {
-		for( ; vert; vert = left.prev() ) {
-		    output( vert );
-		    backend.swaptmesh();
-		}
-		break;
-	    }
-	}
-    }
-}
-
-void
-CoveAndTiler::coveLowerRight( void )
-{
-    GridVertex bgv( bot.uend, bot.vindex );
-    GridVertex gv( bot.uend, top.vindex );
-
-    right.last();
-    backend.bgntmesh( "coveLowerRight" );       
-    output( bgv );
-    output( right.prev() );
-    output( gv );
-    backend.swaptmesh();
-	coveLR();
-    backend.endtmesh( );
-}
-
-void
-CoveAndTiler::coveLowerRightNoGrid( TrimVertex* tr )
-{
-    backend.bgntmesh( "coveLowerRIght" );
-    output( right.last() );
-    output( right.prev() );
-    output( tr );
-    backend.swaptmesh();
-	coveLR();
-    backend.endtmesh();
-}
-
-void
-CoveAndTiler::coveLR( )
-{
-    GridVertex gv( bot.uend, top.vindex );
-    TrimVertex *vert = right.prev();
-    if( vert == NULL ) return;
-    assert( vert->param[0] >= uarray.uarray[gv.gparam[0]]  );
-
-    if( gv.nextu() >= top.uend ) {
-	for( ; vert; vert = right.prev() ) {
-	    backend.swaptmesh();
-	    output( vert );
-	}
-    } else while( 1 ) {
-	if( vert->param[0] < uarray.uarray[gv.gparam[0]]  ) {
-	    backend.swaptmesh();
-	    output( vert );
-	    vert = right.prev();
-	    if( vert == NULL ) break;
-	} else {
-	    output( gv );
-	    backend.swaptmesh();
-	    if( gv.nextu() == top.uend ) {
-		for( ; vert; vert = right.prev() ) {
-		    backend.swaptmesh();
-		    output( vert );
-		}
-		break;
-	    }
-	}
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/coveandtiler.h b/src/glu/sgi/libnurbs/internals/coveandtiler.h
deleted file mode 100644
index d454202e6d3..00000000000
--- a/src/glu/sgi/libnurbs/internals/coveandtiler.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * coveandtiler.h
- *
- */
-
-#ifndef __glucoveandtiler_h
-#define __glucoveandtiler_h
-
-#include "trimregion.h"
-#include "trimvertex.h"
-#include "gridvertex.h"
-
-class Backend;
-class GridTrimVertex;
-
-class CoveAndTiler : virtual public TrimRegion {
-public:
-    			CoveAndTiler( Backend& );
-    			~CoveAndTiler( void );
-    void 		coveAndTile( void );
-private:
-    Backend&		backend;
-    static const int 	MAXSTRIPSIZE;
-    void		tile( long, long, long );
-    void		coveLowerLeft( void );
-    void		coveLowerRight( void );
-    void		coveUpperLeft( void );
-    void		coveUpperRight( void );
-    void		coveUpperLeftNoGrid( TrimVertex * );
-    void		coveUpperRightNoGrid( TrimVertex * );
-    void		coveLowerLeftNoGrid( TrimVertex * );
-    void		coveLowerRightNoGrid( TrimVertex * );
-    void		coveLL( void );
-    void		coveLR( void );
-    void		coveUL( void );
-    void		coveUR( void );
-    inline void		output( GridTrimVertex& );
-    inline void		output( GridVertex& );
-    inline void		output( TrimVertex* );
-};
-
-#endif /* __glucoveandtiler_h */
diff --git a/src/glu/sgi/libnurbs/internals/curve.cc b/src/glu/sgi/libnurbs/internals/curve.cc
deleted file mode 100644
index b7c4d4a9c7c..00000000000
--- a/src/glu/sgi/libnurbs/internals/curve.cc
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * curve.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "mymath.h"
-#include "curve.h"
-#include "mapdesc.h"
-#include "types.h"
-#include "quilt.h"
-#include "nurbsconsts.h"
-
-/*--------------------------------------------------------------------------
- * Curve::Curve - copy curve from quilt and transform control points
- *--------------------------------------------------------------------------
- */
-
-Curve::Curve( Quilt_ptr geo, REAL pta, REAL ptb, Curve *c )
-{
-    mapdesc = geo->mapdesc;
-    next = c;
-    needsSampling = mapdesc->isRangeSampling() ? 1 : 0;
-    cullval = mapdesc->isCulling() ? CULL_ACCEPT : CULL_TRIVIAL_ACCEPT;
-    order = geo->qspec[0].order;
-    stride = MAXCOORDS;
-    for( int i = 0; i < MAXORDER * MAXCOORDS; i++ ) {
-        cpts[i] = 0;
-        spts[i] = 0;
-    }
-    stepsize = 0;
-    minstepsize = 0;
-
-    REAL *ps  = geo->cpts; 
-    Quiltspec_ptr qs = geo->qspec;
-    ps += qs->offset;
-    ps += qs->index * qs->order * qs->stride;
-
-    if( needsSampling )
-	mapdesc->xformSampling( ps, qs->order, qs->stride, spts, stride );
-	
-    if( cullval == CULL_ACCEPT )
-	mapdesc->xformCulling(  ps, qs->order, qs->stride, cpts, stride );
-
-    /* set untrimmed curve range */
-    range[0] = qs->breakpoints[qs->index];
-    range[1] = qs->breakpoints[qs->index+1];
-    range[2] = range[1] - range[0];
-
-    if( range[0] != pta ) {
-	Curve lower( *this, pta, 0 );
-	lower.next = next;
-	*this = lower;
-    }
-    if( range[1] != ptb ) {
-	Curve lower( *this, ptb, 0 );
-    }
-}
-
-/*--------------------------------------------------------------------------
- * Curve::Curve - subdivide a curve along an isoparametric line
- *--------------------------------------------------------------------------
- */
-
-Curve::Curve( Curve& upper, REAL value, Curve *c )
-{
-    Curve &lower = *this;
-
-    lower.next = c;
-    lower.mapdesc = upper.mapdesc;
-    lower.needsSampling = upper.needsSampling;
-    lower.order = upper.order;
-    lower.stride = upper.stride;
-    lower.cullval = upper.cullval;
-
-    REAL d = (value - upper.range[0]) / upper.range[2];
-
-    if( needsSampling )
-        mapdesc->subdivide( upper.spts, lower.spts, d, upper.stride, upper.order );
-
-    if( cullval == CULL_ACCEPT ) 
-        mapdesc->subdivide( upper.cpts, lower.cpts, d, upper.stride, upper.order );
-
-    lower.range[0] = upper.range[0];
-    lower.range[1] = value;
-    lower.range[2] = value - upper.range[0];
-    upper.range[0] = value;
-    upper.range[2] = upper.range[1] - value;
-}
-
-
-/*--------------------------------------------------------------------------
- * Curve::clamp - clamp the sampling rate to a given maximum
- *--------------------------------------------------------------------------
- */
-
-void
-Curve::clamp( void )
-{
-    if( stepsize < minstepsize )
-        stepsize = mapdesc->clampfactor * minstepsize;
-}
-
-void
-Curve::setstepsize( REAL max )
-{
-    stepsize = ( max >= 1.0 ) ? (range[2] / max) : range[2];
-    minstepsize = stepsize;
-}
-
-void
-Curve::getstepsize( void )
-{
-    minstepsize= 0;
-
-    if( mapdesc->isConstantSampling() ) {
-	// fixed number of samples per patch in each direction
-	// maxrate is number of s samples per patch
-        setstepsize( mapdesc->maxrate );
-    } else if( mapdesc->isDomainSampling() ) {
-	// maxrate is number of s samples per unit s length of domain
-        setstepsize( mapdesc->maxrate * range[2] );
-    } else {
-	// upper bound on path length between sample points
-
-	assert( order <= MAXORDER );
-    
-	/* points have been transformed, therefore they are homogeneous */
-        REAL tmp[MAXORDER][MAXCOORDS];
-	const int tstride = sizeof(tmp[0]) / sizeof(REAL);
-	int val = mapdesc->project( spts, stride, &tmp[0][0], tstride,  order ); 
-
-        if( val == 0 ) {
-	    // control points cross infinity, therefore derivatives are undefined
-            setstepsize( mapdesc->maxrate );
-        } else {
-            REAL t = mapdesc->getProperty( N_PIXEL_TOLERANCE );
-	    if( mapdesc->isParametricDistanceSampling() ) {
-		REAL d = mapdesc->calcPartialVelocity( &tmp[0][0], tstride, order, 2, range[2] );
-		stepsize = (d > 0.0) ? sqrtf( 8.0 * t / d ) : range[2];
-		minstepsize = ( mapdesc->maxrate > 0.0 ) ? (range[2] / mapdesc->maxrate) : 0.0;
-	    } else if( mapdesc->isPathLengthSampling() ) {
-		// t is upper bound on path (arc) length
-		REAL d = mapdesc->calcPartialVelocity( &tmp[0][0], tstride, order, 1, range[2] );
-		stepsize = ( d > 0.0 ) ? (t / d) : range[2];
-		minstepsize = ( mapdesc->maxrate > 0.0 ) ? (range[2] / mapdesc->maxrate) : 0.0;
-	    } else {
-		// control points cross infinity, therefore partials are undefined
-		setstepsize( mapdesc->maxrate );
-	    }
-	}
-    }
-}
-
-int
-Curve::needsSamplingSubdivision( void )
-{
-    return ( stepsize < minstepsize )  ? 1 : 0;
-}
-
-int
-Curve::cullCheck( void )
-{
-    if( cullval == CULL_ACCEPT ) 
-	cullval = mapdesc->cullCheck( cpts, order, stride );
-    return cullval;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/curve.h b/src/glu/sgi/libnurbs/internals/curve.h
deleted file mode 100644
index 0da81c72168..00000000000
--- a/src/glu/sgi/libnurbs/internals/curve.h
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * curve.h
- *
- */
-
-#ifndef __glucurve_h_
-#define __glucurve_h_
-
-#include "types.h"
-#include "defines.h"
-
-class Mapdesc;
-class Quilt;
-
-
-class Curve {
-public:
-friend class Curvelist;
-    			Curve( Quilt *, REAL, REAL, Curve * );
-    			Curve( Curve&, REAL, Curve * );
-    Curve *		next;
-private:
-    Mapdesc *		mapdesc;
-    int			stride;
-    int		        order;
-    int			cullval;
-    int			needsSampling;
-    REAL		cpts[MAXORDER*MAXCOORDS];
-    REAL		spts[MAXORDER*MAXCOORDS];
-    REAL		stepsize;
-    REAL		minstepsize;
-    REAL		range[3];
-
-    void		clamp( void );
-    void		setstepsize( REAL );
-    void		getstepsize( void );
-    int			cullCheck( void );
-    int			needsSamplingSubdivision( void );
-};
-#endif /* __glucurve_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/curvelist.cc b/src/glu/sgi/libnurbs/internals/curvelist.cc
deleted file mode 100644
index 8f2ee4678d2..00000000000
--- a/src/glu/sgi/libnurbs/internals/curvelist.cc
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * curvelist.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "quilt.h"
-#include "curvelist.h"
-#include "curve.h"
-#include "types.h"
-
-Curvelist::Curvelist( Quilt *quilts, REAL pta, REAL ptb )
-{
-    curve = 0;
-    for( Quilt *q = quilts; q; q = q->next ) 
-	curve = new Curve( q, pta, ptb, curve );
-    range[0] = pta;
-    range[1] = ptb;
-    range[2] = ptb - pta;
-    needsSubdivision = 0;
-    stepsize = 0;
-}
-
-Curvelist::Curvelist( Curvelist &upper, REAL value )
-{
-    curve = 0;
-    for( Curve *c = upper.curve; c; c = c->next )
-	curve = new Curve( *c, value, curve );
-
-    range[0] = upper.range[0];
-    range[1] = value;
-    range[2] = value - upper.range[0];
-    upper.range[0] = value;
-    upper.range[2] = upper.range[1] - value;
-    needsSubdivision = 0;
-    stepsize = 0;
-}
-
-Curvelist::~Curvelist()
-{
-    while( curve ) {
-	Curve *c = curve;
-	curve = curve->next;
-	delete c;
-    }
-}
-
-int
-Curvelist::cullCheck( void )
-{
-    for( Curve *c = curve; c; c = c->next )
-	if( c->cullCheck() == CULL_TRIVIAL_REJECT )
-	    return CULL_TRIVIAL_REJECT;
-    return CULL_ACCEPT;
-}
-
-void
-Curvelist::getstepsize( void )
-{
-    stepsize = range[2];
-    Curve *c;
-    for( c = curve; c; c = c->next ) {
-	c->getstepsize();
-	c->clamp();
-	stepsize =  ((c->stepsize < stepsize) ? c->stepsize : stepsize);
-	if( c->needsSamplingSubdivision() ) break;
-    }
-    needsSubdivision = ( c ) ? 1 : 0;
-}
-
-int
-Curvelist::needsSamplingSubdivision( void )
-{
-    return needsSubdivision;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/curvelist.h b/src/glu/sgi/libnurbs/internals/curvelist.h
deleted file mode 100644
index 733a5115d01..00000000000
--- a/src/glu/sgi/libnurbs/internals/curvelist.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * curvelist.h
- *
- */
-
-#ifndef __glucurvelist_h_
-#define __glucurvelist_h_
-
-#include "types.h"
-#include "defines.h"
-
-class Mapdesc;
-class Quilt;
-class Curve;
-
-class Curvelist 
-{
-friend class Subdivider;
-public:
-			Curvelist( Quilt *, REAL, REAL );
-    			Curvelist( Curvelist &, REAL );
-			~Curvelist( void );
-    int			cullCheck( void );
-    void		getstepsize( void );
-    int			needsSamplingSubdivision();
-private:
-    Curve		*curve;
-    float		range[3];
-    int			needsSubdivision;
-    float		stepsize;
-};
-#endif /* __glucurvelist_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/curvesub.cc b/src/glu/sgi/libnurbs/internals/curvesub.cc
deleted file mode 100644
index 91f2ca8ce8e..00000000000
--- a/src/glu/sgi/libnurbs/internals/curvesub.cc
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * curvesub.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "subdivider.h"
-#include "renderhints.h"
-#include "backend.h"
-#include "quilt.h"
-#include "curvelist.h"
-#include "nurbsconsts.h"
-
-/*--------------------------------------------------------------------------
- * drawCurves - main curve rendering entry point
- *--------------------------------------------------------------------------
- */
-
-void
-Subdivider::drawCurves( void )
-{
-    REAL 	from[1], to[1];
-    Flist	bpts;
-    qlist->getRange( from, to, bpts );
-
-    renderhints.init( );
-
-    backend.bgncurv();
-    for( int i=bpts.start; i<bpts.end-1; i++ ) {
-        REAL pta, ptb;
-	pta = bpts.pts[i];
-	ptb = bpts.pts[i+1];
-
-	qlist->downloadAll( &pta, &ptb, backend );
-
-	Curvelist curvelist( qlist, pta, ptb );
-	samplingSplit( curvelist, renderhints.maxsubdivisions );
-    }
-    backend.endcurv();
-}
-
-
-/*--------------------------------------------------------------------------
- * samplingSplit - recursively subdivide patch, cull check each subpatch  
- *--------------------------------------------------------------------------
- */
-
-void
-Subdivider::samplingSplit( Curvelist& curvelist, int subdivisions )
-{
-    if( curvelist.cullCheck() == CULL_TRIVIAL_REJECT )  return;
-
-    curvelist.getstepsize();
-
-    if( curvelist.needsSamplingSubdivision() && (subdivisions > 0) ) {
-	REAL mid = ( curvelist.range[0] + curvelist.range[1] ) * 0.5;
-	Curvelist lowerlist( curvelist, mid );
-	samplingSplit( lowerlist, subdivisions-1 ); // lower
-	samplingSplit( curvelist, subdivisions-1 ); // upper
-    } else {
-	long nu = 1 + ((long) (curvelist.range[2] / curvelist.stepsize));
-	backend.curvgrid( curvelist.range[0], curvelist.range[1], nu );
-	backend.curvmesh( 0, nu );
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/dataTransform.cc b/src/glu/sgi/libnurbs/internals/dataTransform.cc
deleted file mode 100644
index 55c0fbb159a..00000000000
--- a/src/glu/sgi/libnurbs/internals/dataTransform.cc
+++ /dev/null
@@ -1,209 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "glimports.h"
-#include "myassert.h"
-#include "nurbsconsts.h"
-#include "trimvertex.h"
-#include "dataTransform.h"
-
-extern directedLine* arcLoopToDLineLoop(Arc_ptr loop);
-
-#if 0 // UNUSED
-static directedLine* copy_loop(Arc_ptr loop, Real2* vertArray, int& index, directedLine dline_buf[], sampledLine sline_buf[], int& index_dline)
-{
-  directedLine *ret;
-  int old_index = index;
-  int i = index;
-  int j;
-  for(j=0; j<loop->pwlArc->npts-1; j++, i++)
-    {
-      vertArray[i][0] = loop->pwlArc->pts[j].param[0];
-      vertArray[i][1] = loop->pwlArc->pts[j].param[1];
-    }  
-  loop->clearmark();
-
-  for(Arc_ptr jarc = loop->next; jarc != loop; jarc=jarc->next)
-    {
-      for(j=0; j<jarc->pwlArc->npts-1; j++, i++)
-	{
-	  vertArray[i][0] = jarc->pwlArc->pts[j].param[0];
-	  vertArray[i][1] = jarc->pwlArc->pts[j].param[1];
-	}
-      jarc->clearmark();
-    }
-  //copy the first vertex again
-  vertArray[i][0] = loop->pwlArc->pts[0].param[0];
-  vertArray[i][1] = loop->pwlArc->pts[0].param[1];  
-  i++;
-  index=i;
-
-  directedLine* dline;
-  sampledLine* sline;
-  sline = &sline_buf[index_dline];
-  dline = &dline_buf[index_dline];
-  sline->init(2, &vertArray[old_index]);
-  dline->init(INCREASING, sline);
-  ret = dline;
-  index_dline++;
-
-  for(i=old_index+1; i<= index-2; i++)
-    {
-      sline = &sline_buf[index_dline];
-      dline = &dline_buf[index_dline];
-      sline->init(2, &vertArray[i]);
-      dline->init(INCREASING, sline);
-      ret->insert(dline);
-      index_dline++;
-    }
-  return ret;
-}
-#endif
-
-#if 0 // UNUSED
-static int num_edges(Bin& bin)
-{
-  int sum=0;
-  for(Arc_ptr jarc = bin.firstarc(); jarc; jarc=bin.nextarc())
-    sum += jarc->pwlArc->npts-1;
-  return sum;
-}
-#endif
-
-/*
-directedLine* bin_to_DLineLoops(Bin& bin)
-{
-  directedLine *ret=NULL;
-  directedLine *temp;
-
-  int numedges = num_edges(bin);
-  directedLine* dline_buf = new directedLine[numedges]; //not work for N32?
-  sampledLine* sline_buf=new sampledLine[numedges];
-
-  Real2* vertArray = new Real2[numedges*2];
-  int index = 0;
-  int index_dline = 0;
-  bin.markall();
-
-  for(Arc_ptr jarc = bin.firstarc(); jarc; jarc=bin.nextarc())
-    {
-      if(jarc->ismarked())
-	{
-	  assert(jarc->check() != 0);
-	  Arc_ptr jarchead = jarc;
-	  do {
-	    jarc->clearmark();
-	    jarc = jarc->next;
-	  } while(jarc != jarchead);
-	  temp=copy_loop(jarchead, vertArray, index, dline_buf, sline_buf, index_dline);
-	  ret = temp->insertPolygon(ret);
-	}
-    }
-
-  return ret;
-}
-*/
-
-
-directedLine* bin_to_DLineLoops(Bin& bin)
-{
-  directedLine *ret=NULL;
-  directedLine *temp;
-  bin.markall();
-  for(Arc_ptr jarc=bin.firstarc(); jarc; jarc=bin.nextarc()){
-    if(jarc->ismarked()) {
-      assert(jarc->check() != 0);
-      Arc_ptr jarchead = jarc;
-      do {
-	jarc->clearmark();
-	jarc = jarc->next;
-      } while(jarc != jarchead);
-      temp =  arcLoopToDLineLoop(jarc);
-      ret = temp->insertPolygon(ret);
-    }
-  }
-  return ret;
-}
-
-directedLine* o_pwlcurve_to_DLines(directedLine* original, O_pwlcurve* pwl)
-{
-  directedLine* ret = original;
-  for(Int i=0; i<pwl->npts-1; i++)
-    {
-      sampledLine* sline = new sampledLine(2);
-      sline->setPoint(0, pwl->pts[i].param);
-      sline->setPoint(1, pwl->pts[i+1].param);
-      directedLine* dline = new directedLine(INCREASING, sline);
-      if(ret == NULL)
-	ret = dline;
-      else
-	ret->insert(dline);
-    }
-  return ret;      
-}
-
-directedLine* o_curve_to_DLineLoop(O_curve* cur)
-{
-  directedLine *ret;
-  if(cur == NULL)
-    return NULL;
-  assert(cur->curvetype == ct_pwlcurve);
-  ret = o_pwlcurve_to_DLines(NULL, cur->curve.o_pwlcurve);
-  for(O_curve* temp = cur->next; temp != NULL; temp = temp->next)
-    {
-      assert(temp->curvetype == ct_pwlcurve);
-      ret = o_pwlcurve_to_DLines(ret, temp->curve.o_pwlcurve);
-    }
-  return ret;
-}
-
-directedLine* o_trim_to_DLineLoops(O_trim* trim)
-{
-  O_trim* temp;
-  directedLine *ret;
-  if(trim == NULL)
-    return NULL;
-  ret = o_curve_to_DLineLoop(trim->o_curve);
-
-  for(temp=trim->next; temp != NULL; temp = temp->next)
-    {
-      ret = ret->insertPolygon(o_curve_to_DLineLoop(temp->o_curve));
-    }
-  return ret;
-}
diff --git a/src/glu/sgi/libnurbs/internals/dataTransform.h b/src/glu/sgi/libnurbs/internals/dataTransform.h
deleted file mode 100644
index 7898df754d7..00000000000
--- a/src/glu/sgi/libnurbs/internals/dataTransform.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _DATA_TRANSFORM_H
-#define _DATA_TRANSFORM_H
-
-#include "reader.h"
-#include "directedLine.h"
-#include "bin.h"
-directedLine* bin_to_DLineLoops(Bin& bin);
-
-/*transform the pwlcurve into a number of directedline lines
- *insert these directedlines into orignal which is supposed to be
- *the part of the trimming loop obtained so far.
- *return the updated trimkming loop.
- */
-directedLine* o_pwlcurve_to_DLines(directedLine* original, O_pwlcurve* pwl);
-
-/*transform a trim loop (curve) into a directedLine loop
- */
-directedLine* o_curve_to_DLineLoop(O_curve* curve);
-
-/*transform a list of trim loops (trim) into
- *a list of polygons represented as directedLine*.
- */
-directedLine* o_trim_to_DLineLoops(O_trim* trim);
-
-
-#endif
-
diff --git a/src/glu/sgi/libnurbs/internals/defines.h b/src/glu/sgi/libnurbs/internals/defines.h
deleted file mode 100644
index 32950d613ba..00000000000
--- a/src/glu/sgi/libnurbs/internals/defines.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * defines.h
- *
- */
-
-#ifndef __gludefines_h_
-#define __gludefines_h_
-
-/* culling constants */
-#define CULL_TRIVIAL_REJECT	0
-#define CULL_TRIVIAL_ACCEPT	1
-#define CULL_ACCEPT		2
-
-/* maximum order of a B-Spline */ 
-#define	MAXORDER 	24
-
-/* maximum dimension of any B-spline range space  */
-#define MAXCOORDS	5
-
-#endif /* __gludefines_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/displaylist.cc b/src/glu/sgi/libnurbs/internals/displaylist.cc
deleted file mode 100644
index 48593c6371d..00000000000
--- a/src/glu/sgi/libnurbs/internals/displaylist.cc
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * displaylist.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "nurbstess.h"
-#include "displaylist.h"
-
-
-DisplayList::DisplayList( NurbsTessellator  *_nt ) :
-	dlnodePool( sizeof( Dlnode ), 1, "dlnodepool" )
-{
-    lastNode = &nodes;
-    nt = _nt;
-}
-
-DisplayList::~DisplayList( void ) 
-{
-    for( Dlnode *nextNode; nodes; nodes = nextNode ) {
-	nextNode = nodes->next;
-	if( nodes->cleanup != 0 ) (nt->*nodes->cleanup)( nodes->arg );
-	//nodes->deleteMe(dlnodePool);
-    }
-}
-
-void 
-DisplayList::play( void )
-{
-    for( Dlnode *node = nodes; node; node = node->next ) 
-	if( node->work != 0 ) (nt->*node->work)( node->arg );
-}
-
-void 
-DisplayList::endList( void )
-{
-    *lastNode = 0;
-}
-
-void 
-DisplayList::append( PFVS work, void *arg, PFVS cleanup )
-{
-    Dlnode *node = new(dlnodePool) Dlnode( work, arg, cleanup );
-    *lastNode = node;
-    lastNode = &(node->next);
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/displaylist.h b/src/glu/sgi/libnurbs/internals/displaylist.h
deleted file mode 100644
index d009a42513e..00000000000
--- a/src/glu/sgi/libnurbs/internals/displaylist.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * displaylist.h
- *
- */
-
-#ifndef __gludisplaylist_h_
-#define __gludisplaylist_h_
-
-#include "glimports.h"
-#include "mysetjmp.h"
-#include "mystdio.h"
-#include "bufpool.h"
-
-class NurbsTessellator;
-
-typedef void (NurbsTessellator::*PFVS)( void * );
-
-struct Dlnode : public PooledObj {
-    			Dlnode( PFVS, void *, PFVS );
-    PFVS		work;
-    void *		arg;
-    PFVS		cleanup;
-    Dlnode *		next;
-};
-
-inline
-Dlnode::Dlnode( PFVS _work, void *_arg, PFVS _cleanup ) 
-{
-    work = _work;
-    arg = _arg;
-    cleanup = _cleanup;
-    next = 0;
-}
-
-class DisplayList {
-public:
-			DisplayList( NurbsTessellator * );
-			~DisplayList( void );
-    void		play( void );
-    void		append( PFVS work, void *arg, PFVS cleanup );
-    void		endList( void );
-private:
-    Dlnode 		*nodes;
-    Pool		dlnodePool;
-    Dlnode		**lastNode;
-    NurbsTessellator 	*nt;
-};
-
-#endif /* __gludisplaylist_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/displaymode.h b/src/glu/sgi/libnurbs/internals/displaymode.h
deleted file mode 100644
index 53968b2f1c9..00000000000
--- a/src/glu/sgi/libnurbs/internals/displaymode.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef __gludisplaymode_h_
-#define __gludisplaymode_h_
-
-#define N_MESHFILL	0
-#define N_MESHLINE	1
-#define N_MESHPOINT	2
-
-#endif /* __gludisplaymode_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/flist.cc b/src/glu/sgi/libnurbs/internals/flist.cc
deleted file mode 100644
index d3162b9f5f5..00000000000
--- a/src/glu/sgi/libnurbs/internals/flist.cc
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * flist.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "flist.h"
-
-/*----------------------------------------------------------------------------
- * Flist::Flist - initialize a REAL number array
- *----------------------------------------------------------------------------
- */
-Flist::Flist( void )
-{
-    npts = 0;
-    pts = 0;
-    start = end = 0;
-}
-
-/*----------------------------------------------------------------------------
- * Flist::~Flist - free a REAL number array
- *----------------------------------------------------------------------------
- */
-Flist::~Flist( void )
-{
-    if( npts ) delete[] pts;
-}
-
-void
-Flist::add( REAL x )
-{
-    pts[end++] = x;
-    assert( end <= npts );
-}
-
-/*----------------------------------------------------------------------------
- * Flist::filter - remove duplicate numbers from array
- *----------------------------------------------------------------------------
- */
-void Flist::filter( void )
-{
-    sorter.qsort( pts, end );
-    start = 0;
-
-    int j = 0;
-    for( int i = 1; i < end; i++ ) { 
-	if( pts[i] == pts[i-j-1] )
-	    j++;
-	pts[i-j] = pts[i];
-    }
-    end -= j;
-}
-
-/*----------------------------------------------------------------------------
- * Flist::grow - ensure that array is large enough
- *----------------------------------------------------------------------------
- */
-void Flist::grow( int maxpts )
-{
-    if( npts < maxpts ) {
-	if( npts ) delete[] pts;
-	npts = 2 * maxpts; 
-	pts = new REAL[npts];
-	assert( pts != 0 );
-    }
-    start = end = 0;
-}
-
-/*----------------------------------------------------------------------------
- * Flist::taper - ignore head and tail of array
- *----------------------------------------------------------------------------
- */
-void Flist::taper( REAL from, REAL to )
-{
-    while( pts[start] != from )
-	start++;
-
-    while( pts[end-1] != to )
-	end--;
-}
-
-
diff --git a/src/glu/sgi/libnurbs/internals/flist.h b/src/glu/sgi/libnurbs/internals/flist.h
deleted file mode 100644
index 014273ebe51..00000000000
--- a/src/glu/sgi/libnurbs/internals/flist.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * flist.h
- *
- */
-
-#ifndef __gluflist_h_
-#define __gluflist_h_
-
-#include "types.h"
-#include "flistsorter.h"
-
-class Flist {
-public:
-    REAL *		pts;		/* head of array */
-    int			npts;		/* number of points in array */
-    int			start;		/* first important point index */
-    int			end;		/* last important point index */
-
-    			Flist( void );
-    			~Flist( void );
-    void		add( REAL x );
-    void		filter( void );
-    void		grow( int);
-    void		taper( REAL , REAL );
-protected:
-    FlistSorter 	sorter;
-};
-
-#endif /* __gluflist_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/flistsorter.cc b/src/glu/sgi/libnurbs/internals/flistsorter.cc
deleted file mode 100644
index d49bdea3e00..00000000000
--- a/src/glu/sgi/libnurbs/internals/flistsorter.cc
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * flistsorter.c++
- *
- */
-
-#include "glimports.h"
-#include "flistsorter.h"
-
-FlistSorter::FlistSorter( void ) : Sorter( sizeof( REAL ) )
-{
-}
-
-void
-FlistSorter::qsort( REAL *p, int n )
-{
-    Sorter::qsort( (char *)p, n );
-}
-
-int
-FlistSorter::qscmp( char *i, char *j )
-{
-    REAL f0 = *(REAL *)i;
-    REAL f1 = *(REAL *)j;
-    return (f0 < f1) ? -1 : 1;
-}
-
-void
-FlistSorter::qsexc( char *i, char *j )
-{
-    REAL *f0 = (REAL *)i;
-    REAL *f1 = (REAL *)j;
-    REAL tmp = *f0;
-    *f0 = *f1;
-    *f1 = tmp;
-}
-
-void
-FlistSorter::qstexc( char *i, char *j, char *k )
-{
-    REAL *f0 = (REAL *)i;
-    REAL *f1 = (REAL *)j;
-    REAL *f2 = (REAL *)k;
-    REAL tmp = *f0;
-    *f0 = *f2;
-    *f2 = *f1;
-    *f1 = tmp;
-}
diff --git a/src/glu/sgi/libnurbs/internals/flistsorter.h b/src/glu/sgi/libnurbs/internals/flistsorter.h
deleted file mode 100644
index 65e6a572e30..00000000000
--- a/src/glu/sgi/libnurbs/internals/flistsorter.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * flistsorter.h
- *
- */
-
-#ifndef __gluflistsorter_h_
-#define __gluflistsorter_h_
-
-#include "sorter.h"
-#include "types.h"
-
-class FlistSorter : public Sorter {
-public:
-			FlistSorter(void);
-    virtual             ~FlistSorter() { /* silence warning*/ }
-    void		qsort( REAL *a, int n );
-
-protected:	
-    virtual int		qscmp( char *, char * );
-    virtual void	qsexc( char *i, char *j );	// i<-j, j<-i 
-    virtual void	qstexc( char *i, char *j, char *k ); // i<-k, k<-j, j<-i 
-};
-#endif /* __gluflistsorter_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/gridline.h b/src/glu/sgi/libnurbs/internals/gridline.h
deleted file mode 100644
index 1a92e3b13b5..00000000000
--- a/src/glu/sgi/libnurbs/internals/gridline.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * gridline.h
- *
- */
-
-#ifndef __glugridline_h_
-#define __glugridline_h_
-
-struct Gridline {
-    long 		v;
-    REAL		vval;
-    long		vindex;
-    long 		ustart;
-    long 		uend;
- };
-#endif /* __glugridline_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/gridtrimvertex.h b/src/glu/sgi/libnurbs/internals/gridtrimvertex.h
deleted file mode 100644
index 707f649d20b..00000000000
--- a/src/glu/sgi/libnurbs/internals/gridtrimvertex.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * gridtrimvertex.h
- *
- */
-
-#ifndef __glugridtrimvertex_h_
-#define __glugridtrimvertex_h_
-
-#include "mystdlib.h"
-#include "bufpool.h"
-#include "trimvertex.h"
-#include "gridvertex.h"
-
-class GridTrimVertex : public PooledObj
-{
-private:
-    TrimVertex	dummyt;
-    GridVertex	dummyg;
-public:
-			GridTrimVertex() { g = 0; t = 0; }
-    TrimVertex	*t;
-    GridVertex	*g;
-   
-    inline void		set( long, long );
-    inline void		set( REAL, REAL );
-    inline void		set( TrimVertex * );
-    inline void		clear( void ) { t = 0; g = 0; };
-    inline int		isGridVert() { return g ? 1 : 0 ; }
-    inline int		isTrimVert() { return t ? 1 : 0 ; }
-    inline void		output();
-};
-
-inline void
-GridTrimVertex::set( long x, long y )
-{
-    g = &dummyg;
-    dummyg.gparam[0] = x;
-    dummyg.gparam[1] = y;
-}
-
-inline void
-GridTrimVertex::set( REAL x, REAL y )
-{
-    g = 0;
-    t = &dummyt;
-    dummyt.param[0] = x;
-    dummyt.param[1] = y;
-    dummyt.nuid = 0;
-}
-
-inline void
-GridTrimVertex::set( TrimVertex *v )
-{
-    g = 0;
-    t = v;
-}
-
-typedef GridTrimVertex *GridTrimVertex_p;
-#endif /* __glugridtrimvertex_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/gridvertex.h b/src/glu/sgi/libnurbs/internals/gridvertex.h
deleted file mode 100644
index 2e27436ef81..00000000000
--- a/src/glu/sgi/libnurbs/internals/gridvertex.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * gridvertex.h
- *
- */
-
-#ifndef __glugridvertex_h_
-#define __glugridvertex_h_
-
-struct GridVertex {
-    long 		gparam[2];
-			GridVertex( void ) { gparam[0] = 0, gparam[1] = 0; }
-			GridVertex( long u, long v ) { gparam[0] = u, gparam[1] = v; }
-    void		set( long u, long v ) { gparam[0] = u, gparam[1] = v; }
-    long		nextu() { return gparam[0]++; }
-    long		prevu() { return gparam[0]--; }
-};
-
-#endif /* __glugridvertex_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/hull.cc b/src/glu/sgi/libnurbs/internals/hull.cc
deleted file mode 100644
index 389ba66fb84..00000000000
--- a/src/glu/sgi/libnurbs/internals/hull.cc
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * hull.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "hull.h"
-#include "gridvertex.h"
-#include "gridtrimvertex.h"
-#include "gridline.h"
-#include "trimline.h"
-#include "uarray.h"
-#include "trimregion.h"
-
-Hull::Hull( void )
-{}
-
-Hull::~Hull( void )
-{}
-
-/*----------------------------------------------------------------------
- * Hull:init - this routine does the initialization needed before any
- *	 	calls to nextupper or nextlower can be made.
- *----------------------------------------------------------------------
- */
-void
-Hull::init( void )
-{
-    TrimVertex *lfirst = left.first();
-    TrimVertex *llast = left.last();
-    if( lfirst->param[0] <= llast->param[0] ) {
-	fakeleft.init( left.first() );
-	upper.left = &fakeleft;
-	lower.left = &left;
-    } else {
-	fakeleft.init( left.last() );
-	lower.left = &fakeleft;
- 	upper.left = &left;
-    }
-    upper.left->last();
-    lower.left->first();
-
-    if( top.ustart <= top.uend ) {
-	upper.line = &top;
-	upper.index = top.ustart;
-    } else
-	upper.line = 0;
-
-    if( bot.ustart <= bot.uend ) {
-	lower.line = &bot;
-	lower.index = bot.ustart;
-    } else
-	lower.line = 0;
-
-    TrimVertex *rfirst = right.first();
-    TrimVertex *rlast = right.last();
-    if( rfirst->param[0] <= rlast->param[0] ) {
-	fakeright.init( right.last() );
-	lower.right = &fakeright;
-	upper.right = &right;
-    } else {
-	fakeright.init( right.first() );
-	upper.right = &fakeright;
-	lower.right = &right;
-    }
-    upper.right->first();
-    lower.right->last();
-}
-
-/*----------------------------------------------------------------------
- * nextupper - find next vertex on upper hull of trim region.
- *		 - if vertex is on trim curve, set vtop point to 
- *		   that vertex.  if vertex is on grid, set vtop to
- *		   point to temporary area and stuff coordinants into
- *		   temporary vertex.  Also, place grid coords in temporary
- *		   grid vertex.
- *----------------------------------------------------------------------
- */
-GridTrimVertex *
-Hull::nextupper( GridTrimVertex *gv )
-{
-    if( upper.left ) {
-	gv->set( upper.left->prev() );
-	if( gv->isTrimVert() ) return gv;
-	upper.left = 0;
-    } 
-
-    if( upper.line ) {
-	assert( upper.index <= upper.line->uend );
-	gv->set( uarray.uarray[upper.index], upper.line->vval );
-	gv->set( upper.index, upper.line->vindex );
-	if( upper.index++ == upper.line->uend ) upper.line = 0;
-	return gv; 
-    } 
-
-    if( upper.right ) {
-	gv->set( upper.right->next() );
-	if( gv->isTrimVert() ) return gv;
-	upper.right = 0;
-    } 
-
-    return 0; 
-}
-
-GridTrimVertex *
-Hull::nextlower( register GridTrimVertex *gv )
-{
-    if( lower.left ) {
-	gv->set( lower.left->next() );
-	if( gv->isTrimVert() ) return gv;
-	lower.left = 0;
-    } 
-
-    if( lower.line ) {
-	gv->set( uarray.uarray[lower.index], lower.line->vval );
-	gv->set( lower.index, lower.line->vindex );
-	if( lower.index++ == lower.line->uend ) lower.line = 0;
-	return gv;
-    } 
-
-    if( lower.right ) {
-	gv->set( lower.right->prev() );
-	if( gv->isTrimVert() ) return gv;
-	lower.right = 0;
-    } 
-
-    return 0;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/hull.h b/src/glu/sgi/libnurbs/internals/hull.h
deleted file mode 100644
index dfe865267f7..00000000000
--- a/src/glu/sgi/libnurbs/internals/hull.h
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * hull.h
- *
- */
-
-#ifndef __gluhull_h_
-#define __gluhull_h_
-
-#include "trimline.h"
-#include "trimregion.h"
-#include "trimvertex.h"
-#include "gridtrimvertex.h"
-
-struct Gridline;
-class Uarray;
-
-class Hull : virtual public TrimRegion {
-public:
-    			Hull( void );
-    			~Hull( void );
-    void		init( void );
-    GridTrimVertex *	nextlower( GridTrimVertex * );
-    GridTrimVertex *	nextupper( GridTrimVertex * );
-private:
-    struct Side {
-	Trimline 	*left;
-	Gridline     	*line;
-	Trimline 	*right;
-	long 		index;
-    };
-	
-    Side 		lower;
-    Side		upper;
-    Trimline 		fakeleft;
-    Trimline		fakeright;
-};
-
-
-#endif /* __gluhull_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/intersect.cc b/src/glu/sgi/libnurbs/internals/intersect.cc
deleted file mode 100644
index b39ea2121ef..00000000000
--- a/src/glu/sgi/libnurbs/internals/intersect.cc
+++ /dev/null
@@ -1,665 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * intersect.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "subdivider.h"
-#include "arc.h"
-#include "bin.h"
-#include "backend.h"
-#include "trimvertpool.h"
-
-/*#define NOTDEF*/
-
-enum i_result { INTERSECT_VERTEX, INTERSECT_EDGE };
-
-/* local functions */
-#ifndef NDEBUG  // for asserts only
-static int		arc_classify( Arc_ptr, int, REAL );
-#endif
-static enum i_result	pwlarc_intersect( PwlArc *, int, REAL, int, int[3] );
-
-
-void
-Subdivider::partition( Bin & bin, Bin & left, Bin & intersections, 
-	        Bin & right, Bin & unknown, int param, REAL value )
-{
-    Bin	headonleft, headonright, tailonleft, tailonright;
-
-    for( Arc_ptr jarc = bin.removearc(); jarc; jarc = bin.removearc() ) {
-
-	REAL tdiff = jarc->tail()[param] - value;
-	REAL hdiff = jarc->head()[param] - value;
-
-	if( tdiff > 0.0 ) {
-	    if( hdiff > 0.0 ) {
-		right.addarc( jarc  );
-	    } else if( hdiff == 0.0 ) {
-		tailonright.addarc( jarc  );
-	    } else {
-	        Arc_ptr	jtemp;
-		switch( arc_split(jarc, param, value, 0) ) {
-		    case 2:
-			tailonright.addarc( jarc  );
-			headonleft.addarc( jarc->next  );
-			break;
-		    case 31:
-			assert( jarc->head()[param] > value );
-			right.addarc( jarc  );
-			tailonright.addarc( jtemp = jarc->next  );
-			headonleft.addarc( jtemp->next  );
-		        break;
-		    case 32:
-			assert( jarc->head()[param] <= value );
-			tailonright .addarc( jarc  );
-			headonleft.addarc( jtemp = jarc->next  );
-			left.addarc( jtemp->next  );
-			break;
-		    case 4:
-			right.addarc( jarc  );
-			tailonright.addarc( jtemp = jarc->next  );
-			headonleft.addarc( jtemp = jtemp->next  );
-			left.addarc( jtemp->next  );
-		}
-	    }
-	} else if( tdiff == 0.0 ) {
-	    if( hdiff > 0.0 ) {
-		headonright.addarc( jarc  );
-	    } else if( hdiff == 0.0 ) {
-		unknown.addarc( jarc  );
-	    } else {
-		headonleft.addarc( jarc  );
-	    }
-	} else {
-	    if( hdiff > 0.0 ) {
-	        Arc_ptr	jtemp;
-		switch( arc_split(jarc, param, value, 1) ) {
-		    case 2:
-			tailonleft.addarc( jarc  );
-			headonright.addarc( jarc->next  );
-			break;
-		    case 31:
-			assert( jarc->head()[param] < value );
-			left.addarc( jarc  );
-			tailonleft.addarc( jtemp = jarc->next  );
-			headonright.addarc( jtemp->next  );
-			break;
-		    case 32:
-			assert( jarc->head()[param] >= value );
-			tailonleft.addarc( jarc  );
-			headonright.addarc( jtemp = jarc->next  );
-			right.addarc( jtemp->next  );
-			break;
-		    case 4:
-			left.addarc( jarc  );
-			tailonleft.addarc( jtemp = jarc->next  );
-			headonright.addarc( jtemp = jtemp->next  );
-			right.addarc( jtemp->next  );
-		}
-	    } else if( hdiff == 0.0 ) {
-		tailonleft.addarc( jarc  );
-	    } else {
-		left.addarc( jarc  );
-	    }
-	}
-    }
-    if( param == 0 ) {
-	classify_headonleft_s( headonleft, intersections, left, value );
-	classify_tailonleft_s( tailonleft, intersections, left, value );
-	classify_headonright_s( headonright, intersections, right, value );
-	classify_tailonright_s( tailonright, intersections, right, value );
-    } else {
-	classify_headonleft_t( headonleft, intersections, left, value );
-	classify_tailonleft_t( tailonleft, intersections, left, value );
-	classify_headonright_t( headonright, intersections, right, value );
-	classify_tailonright_t( tailonright, intersections, right, value );
-    }
-}
-
-inline static void 
-vert_interp( TrimVertex *n, TrimVertex *l, TrimVertex *r, int p, REAL val )
-{
-    assert( val > l->param[p]);
-    assert( val < r->param[p]);
-
-    n->nuid = l->nuid;
-
-    n->param[p] = val;
-    if( l->param[1-p] != r->param[1-p]  ) {
-	REAL ratio = (val - l->param[p]) / (r->param[p] - l->param[p]);
-	n->param[1-p] = l->param[1-p] + 
-		        ratio * (r->param[1-p] - l->param[1-p]);
-    } else {
-	n->param[1-p] = l->param[1-p];
-    }
-}
-	
-int
-Subdivider::arc_split( Arc_ptr jarc, int param, REAL value, int dir )
-{
-    int		maxvertex = jarc->pwlArc->npts;
-    Arc_ptr	jarc1;
-    TrimVertex* v = jarc->pwlArc->pts;
-
-    int		loc[3];
-    switch( pwlarc_intersect( jarc->pwlArc, param, value, dir, loc ) ) {
-
-		// When the parameter value lands on a vertex, life is sweet
-    case INTERSECT_VERTEX: {
-	    jarc1 = new(arcpool) Arc( jarc, new( pwlarcpool) PwlArc( maxvertex-loc[1], &v[loc[1]] ) );
-	    jarc->pwlArc->npts = loc[1] + 1;
-	    jarc1->next = jarc->next;
-	    jarc1->next->prev = jarc1;
-	    jarc->next = jarc1;
-	    jarc1->prev = jarc;
-	    assert(jarc->check() != 0);
-	    return 2;
-	}
-
-		// When the parameter value intersects an edge, we have to
-		// interpolate a new vertex.  There are special cases
-		// if the new vertex is adjacent to one or both of the
-		// endpoints of the arc.
-    case INTERSECT_EDGE: {
-	    int i, j;
-	    if( dir == 0 ) {
-		i = loc[0];
-		j = loc[2];
-	    } else {
-		i = loc[2];
-		j = loc[0];
-	    }
-
-#ifndef NOTDEF
-	    // The split is between vertices at index j and i, in that
-	    // order (j < i)
-	    
-	    // JEB:  This code is my idea of how to do the split without
-	    // increasing the number of links.  I'm doing this so that
-	    // the is_rect routine can recognize rectangles created by
-	    // subdivision.  In exchange for simplifying the curve list,
-      	    // however, it costs in allocated space and vertex copies.
-	    
-	    TrimVertex *newjunk = trimvertexpool.get(maxvertex -i+1 /*-j*/);
-	    int k;
-	    for(k=0; k<maxvertex-i; k++)
-	      {
-		newjunk[k+1] = v[i+k];
-		newjunk[k+1].nuid = jarc->nuid;
-	      }
-	    
-	    TrimVertex *vcopy = trimvertexpool.get(maxvertex);
-	    for(k=0; k<maxvertex; k++)
-	      {
-		vcopy[k].param[0] = v[k].param[0];
-		vcopy[k].param[1] = v[k].param[1];
-	      }
-	    jarc->pwlArc->pts=vcopy;
-
-	    v[i].nuid = jarc->nuid;
-	    v[j].nuid = jarc->nuid;
-	    vert_interp( &newjunk[0], &v[loc[0]], &v[loc[2]], param, value );
-
-	    if( showingDegenerate() )
-		backend.triangle( &v[i], &newjunk[0], &v[j] );
-
-            vcopy[j+1].param[0]=newjunk[0].param[0];
-            vcopy[j+1].param[1]=newjunk[0].param[1];
-
-
-	    jarc1 = new(arcpool) Arc( jarc,
-			new(pwlarcpool) PwlArc(maxvertex-i+1 , newjunk ) );
-
-	    jarc->pwlArc->npts = j+2;
-	    jarc1->next = jarc->next;
-	    jarc1->next->prev = jarc1;
-	    jarc->next = jarc1;
-	    jarc1->prev = jarc;
-	    assert(jarc->check() != 0);
-
-	    return 2;
-#endif //not NOTDEF
-		// JEB: This is the original version:
-#ifdef NOTDEF
-            Arc_ptr    jarc2, jarc3;
-	    
-	    TrimVertex *newjunk = trimvertexpool.get(3);
-	    v[i].nuid = jarc->nuid;
-	    v[j].nuid = jarc->nuid;
-	    newjunk[0] = v[j];
-	    newjunk[2] = v[i];
-	    vert_interp( &newjunk[1], &v[loc[0]], &v[loc[2]], param, value );
-
-	    if( showingDegenerate() )
-		backend.triangle( &newjunk[2], &newjunk[1], &newjunk[0] );
-
-		// New vertex adjacent to both endpoints
-	    if (maxvertex == 2) {
-		jarc1 = new(arcpool) Arc( jarc, new(pwlarcpool) PwlArc( 2, newjunk+1 ) );
-		jarc->pwlArc->npts = 2;
-		jarc->pwlArc->pts = newjunk;
-		jarc1->next = jarc->next;
-		jarc1->next->prev = jarc1;
-		jarc->next = jarc1;
-		jarc1->prev = jarc;
-		assert(jarc->check() != 0);
-
-		return 2;
-
-		// New vertex adjacent to ending point of arc
-	    } else if (maxvertex - j == 2) {
-		jarc1 = new(arcpool) Arc( jarc, new(pwlarcpool) PwlArc( 2, newjunk ) );
-		jarc2 = new(arcpool) Arc( jarc, new(pwlarcpool) PwlArc( 2, newjunk+1 ) );
-		jarc->pwlArc->npts = maxvertex-1;
-		jarc2->next = jarc->next;
-		jarc2->next->prev = jarc2;
-		jarc->next = jarc1;
-		jarc1->prev = jarc;
-		jarc1->next = jarc2;
-		jarc2->prev = jarc1;
-		assert(jarc->check() != 0);
-		return 31;
-
-		// New vertex adjacent to starting point of arc
-	    } else if (i == 1) {
-		jarc1 = new(arcpool) Arc( jarc, new(pwlarcpool) PwlArc( 2, newjunk+1 ) );
-		jarc2 = new(arcpool) Arc( jarc, 
-			new(pwlarcpool) PwlArc( maxvertex-1, &jarc->pwlArc->pts[1] ) );
-		jarc->pwlArc->npts = 2;
-		jarc->pwlArc->pts = newjunk;
-		jarc2->next = jarc->next;
-		jarc2->next->prev = jarc2;
-		jarc->next = jarc1;
-		jarc1->prev = jarc;
-		jarc1->next = jarc2;
-		jarc2->prev = jarc1;
-		assert(jarc->check() != 0);
-		return 32;
-
-		// It's somewhere in the middle
-	    } else {
-		jarc1 = new(arcpool) Arc( jarc, new(pwlarcpool) PwlArc( 2, newjunk ) );
-		jarc2 = new(arcpool) Arc( jarc, new(pwlarcpool) PwlArc( 2, newjunk+1 ) );
-		jarc3 = new(arcpool) Arc( jarc, new(pwlarcpool) PwlArc( maxvertex-i, v+i ) );
-		jarc->pwlArc->npts = j + 1;
-		jarc3->next = jarc->next;
-		jarc3->next->prev = jarc3;
-		jarc->next = jarc1;
-		jarc1->prev = jarc;
-		jarc1->next = jarc2;
-		jarc2->prev = jarc1;
-		jarc2->next = jarc3;
-		jarc3->prev = jarc2;
-		assert(jarc->check() != 0);
-		return 4;
-	    }
-#endif // NOTDEF
-	}
-	default:
-	return -1; //picked -1 since it's not used
-    }
-}
-
-/*----------------------------------------------------------------------------
- * pwlarc_intersect -  find intersection of pwlArc and isoparametric line
- *----------------------------------------------------------------------------
- */
-
-static enum i_result
-pwlarc_intersect(
-    PwlArc *pwlArc,
-    int param,
-    REAL value,
-    int dir,
-    int loc[3] )
-{
-    assert( pwlArc->npts > 0 );
-
-    if( dir ) {
-	TrimVertex *v = pwlArc->pts;
-	int imin = 0; 
-	int imax = pwlArc->npts - 1;
-	assert( value > v[imin].param[param] );
-	assert( value < v[imax].param[param] );	
-	while( (imax - imin) > 1 ) {
-	    int imid = (imax + imin)/2;
-	    if( v[imid].param[param] > value )
-		imax = imid;
-	    else if( v[imid].param[param] < value )
-		imin = imid;
-	    else {
-		loc[1] = imid;
-		return INTERSECT_VERTEX;
-	    }
-	}
-	loc[0] = imin;
-	loc[2] = imax;
-	return INTERSECT_EDGE;
-    } else {
-	TrimVertex *v = pwlArc->pts;
-	int imax = 0; 
-	int imin = pwlArc->npts - 1;
-	assert( value > v[imin].param[param] );
-	assert( value < v[imax].param[param] );	
-	while( (imin - imax) > 1 ) {
-	    int imid = (imax + imin)/2;
-	    if( v[imid].param[param] > value )
-		imax = imid;
-	    else if( v[imid].param[param] < value )
-		imin = imid;
-	    else {
-		loc[1] = imid;
-		return INTERSECT_VERTEX;
-	    }
-	}
-	loc[0] = imin;
-	loc[2] = imax;
-	return INTERSECT_EDGE;
-    }
-}
-
-/*----------------------------------------------------------------------------
- * arc_classify - determine which side of a line a jarc lies 
- *----------------------------------------------------------------------------
- */
-
-#ifndef NDEBUG  // for asserts only
-static int
-arc_classify( Arc_ptr jarc, int param, REAL value )
-{
-    REAL tdiff, hdiff;
-    if( param == 0 ) {
-	tdiff = jarc->tail()[0] - value;
-	hdiff = jarc->head()[0] - value;
-    } else {
-	tdiff = jarc->tail()[1] - value;
-	hdiff = jarc->head()[1] - value;
-    }
-
-    if( tdiff > 0.0 ) {
-	if( hdiff > 0.0 ) {
-	    return 0x11;
-	} else if( hdiff == 0.0 ) {
-	    return 0x12;
-	} else {
-	    return 0x10;
-	}
-    } else if( tdiff == 0.0 ) {
-	if( hdiff > 0.0 ) {
-	    return 0x21;
-	} else if( hdiff == 0.0 ) {
-	    return 0x22;
-	} else {
-	    return 0x20;
-	}
-    } else {
-	if( hdiff > 0.0 ) {
-	    return 0x01;
-	} else if( hdiff == 0.0 ) {
-	    return 0x02;
-	} else {
-	    return 0;
-	}
-    }
-}
-#endif
-
-void
-Subdivider::classify_tailonleft_s( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail at left, head on line */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 0, val ) == 0x02 );
-	j->clearitail();
-
-	REAL diff = j->next->head()[0] - val;
-	if( diff > 0.0 ) {
-	    in.addarc( j );
-	} else if( diff < 0.0 ) {
-	    if( ccwTurn_sl( j, j->next ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else {
-	    if( j->next->tail()[1] > j->next->head()[1] ) 
-		in.addarc(j);
-	    else
-		out.addarc(j);
-	}
-    }
-}
-
-void
-Subdivider::classify_tailonleft_t( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail at left, head on line */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 1, val ) == 0x02 );
-	j->clearitail();
-
-        REAL diff = j->next->head()[1] - val;
-	if( diff > 0.0 ) {
-	    in.addarc( j );
-	} else if( diff < 0.0 ) {
-	    if( ccwTurn_tl( j, j->next ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else {
-	    if (j->next->tail()[0] > j->next->head()[0] )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	}
-    }
-}
-
-void
-Subdivider::classify_headonleft_s( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail on line, head at left */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 0, val ) == 0x20 );
-
-	j->setitail();
-
-	REAL diff = j->prev->tail()[0] - val;
-	if( diff > 0.0 ) {
-	    out.addarc( j );
-	} else if( diff < 0.0 ) {
-	    if( ccwTurn_sl( j->prev, j ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else {
-	    if( j->prev->tail()[1] > j->prev->head()[1] )
-		in.addarc( j );
-	    else
-		out.addarc( j );
-	}
-    }
-}
-
-void
-Subdivider::classify_headonleft_t( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail on line, head at left */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 1, val ) == 0x20 );
-	j->setitail();
-
-	REAL diff = j->prev->tail()[1] - val;
-	if( diff > 0.0 ) {
-	    out.addarc( j );
-	} else if( diff < 0.0 ) {
-	    if( ccwTurn_tl( j->prev, j ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else {
-	    if( j->prev->tail()[0] > j->prev->head()[0] )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	}
-    }
-}
-
-
-void
-Subdivider::classify_tailonright_s( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail at right, head on line */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 0, val ) == 0x12);
-	
-	j->clearitail();
-
-        REAL diff = j->next->head()[0] - val;
-	if( diff > 0.0 ) {
-	    if( ccwTurn_sr( j, j->next ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else if( diff < 0.0 ) {
-	    in.addarc( j );
-	} else {
-	    if( j->next->tail()[1] > j->next->head()[1] ) 
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	}
-    }
-}
-
-void
-Subdivider::classify_tailonright_t( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail at right, head on line */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 1, val ) == 0x12);
-	
-	j->clearitail();
-
-	REAL diff =  j->next->head()[1] - val;
-	if( diff > 0.0 ) {
-	    if( ccwTurn_tr( j, j->next ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else if( diff < 0.0 ) { 
-	    in.addarc( j );
-	} else {
-	    if( j->next->tail()[0] > j->next->head()[0] ) 
-		in.addarc( j );
-	    else
-		out.addarc( j );
-	}
-    }
-}
-
-void
-Subdivider::classify_headonright_s( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail on line, head at right */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 0, val ) == 0x21 );
-    
-	j->setitail();
-
-        REAL diff = j->prev->tail()[0] - val;
-	if( diff > 0.0 ) { 
-	    if( ccwTurn_sr( j->prev, j ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else if( diff < 0.0 ) {
-	    out.addarc( j );
-	} else {
-	    if( j->prev->tail()[1] > j->prev->head()[1] )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	}
-    }
-}
-
-void
-Subdivider::classify_headonright_t( Bin& bin, Bin& in, Bin& out, REAL val )
-{
-    /* tail on line, head at right */
-    Arc_ptr j;
-
-    while( (j = bin.removearc()) != NULL ) {
-	assert( arc_classify( j, 1, val ) == 0x21 );
-    
-	j->setitail();
-
-        REAL diff = j->prev->tail()[1] - val;
-	if( diff > 0.0 ) { 
-	    if( ccwTurn_tr( j->prev, j ) )
-		out.addarc( j );
-	    else
-		in.addarc( j );
-	} else if( diff < 0.0 ) {
-	    out.addarc( j );
-	} else {
-	    if( j->prev->tail()[0] > j->prev->head()[0] )
-		in.addarc( j );
-	    else
-		out.addarc( j );
-	}
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/jarcloc.h b/src/glu/sgi/libnurbs/internals/jarcloc.h
deleted file mode 100644
index 5297036fa55..00000000000
--- a/src/glu/sgi/libnurbs/internals/jarcloc.h
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * jarcloc.h
- *
- */
-
-#ifndef __glujarcloc_h_
-#define __glujarcloc_h_
-
-#include "arc.h"
-
-class Jarcloc {
-private:
-    Arc_ptr 		arc;
-    TrimVertex		*p;
-    TrimVertex		*plast;
-public:
-    inline void		init( Arc_ptr a, long first, long last ) { arc = a; p=&a->pwlArc->pts[first]; plast = &a->pwlArc->pts[last]; }
-    inline TrimVertex *	getnextpt( void );
-    inline TrimVertex *	getprevpt( void );
-    inline void		reverse();
-};
-
-inline void
-Jarcloc::reverse()
-{
-    if( plast == &arc->pwlArc->pts[0] )
-	plast =  &arc->pwlArc->pts[arc->pwlArc->npts - 1];
-    else
-	plast =  &arc->pwlArc->pts[0];
-}
-
-inline TrimVertex *
-Jarcloc::getnextpt()
-{
-    assert( p <= plast );
-    if( p == plast ) {
-	arc = arc->next;
-	p = &arc->pwlArc->pts[0];
-	plast = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
-	assert( p < plast );
-    }
-    return p++;
-}
-	
-inline TrimVertex *
-Jarcloc::getprevpt()
-{
-    assert( p >= plast );
-    if( p == plast ) {
-	arc = arc->prev;
-	p = &arc->pwlArc->pts[arc->pwlArc->npts - 1];
-	plast = &arc->pwlArc->pts[0];
-	assert( p > plast );
-    }
-    return p--;
-}
-#endif /* __glujarcloc_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/knotvector.cc b/src/glu/sgi/libnurbs/internals/knotvector.cc
deleted file mode 100644
index dcbf0067d85..00000000000
--- a/src/glu/sgi/libnurbs/internals/knotvector.cc
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * knotvector.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "knotvector.h"
-#include "defines.h"
-
-#ifdef __WATCOMC__
-#pragma warning 726 10
-#endif
-
-void Knotvector::init( long _knotcount, long _stride, long _order, INREAL *_knotlist )
-{
-    knotcount = _knotcount;
-    stride = _stride;
-    order = _order;
-    knotlist = new Knot[_knotcount];
-    assert( knotlist != 0 );
-
-    for( int i = 0; i != _knotcount; i++ )
-	knotlist[i] = (Knot) _knotlist[i];
-}
-
-Knotvector::Knotvector( void )
-{
-    knotcount = 0;
-    stride = 0;
-    order = 0;
-    knotlist = 0;
-}
-
-Knotvector::~Knotvector( void )
-{
-    if( knotlist ) delete[] knotlist;
-}
-
-int Knotvector::validate( void )
-{
-   /* kindex is used as an array index so subtract one first,
-     * this propagates throughout the code so study carefully */
-    long	kindex = knotcount-1;
-
-    if( order < 1 || order > MAXORDER ) {
-	// spline order un-supported
-	return( 1 );
-    }
-
-    if( knotcount < (2 * order) ) {
-	// too few knots
-	return( 2 );
-    }
-
-    if( identical( knotlist[kindex-(order-1)], knotlist[order-1]) ) {
-	// valid knot range is empty
-	return( 3 );
-    }
-
-    for( long i = 0; i < kindex; i++)
-	if( knotlist[i] > knotlist[i+1] ) {
-	    // decreasing knot sequence
-	    return( 4 );
-	}
-        
-    /* check for valid multiplicity */
-
-    /*	kindex is currently the index of the last knot.
-     *	In the next loop  it is decremented to ignore the last knot
-     *	and the loop stops when kindex	is 2 so as to ignore the first
-     *	knot as well.  These knots are not used in computing
-     *	knot multiplicities.
-     */
-
-    long multi = 1;
-    for( ; kindex >= 1; kindex-- ) {
-	if( knotlist[kindex] - knotlist[kindex-1] < TOLERANCE ) {
-	    multi++;
-	    continue;
-	}
-	if ( multi > order ) {
-	    // knot multiplicity greater than order of spline
-	    return( 5 );
-	}
-	multi = 1;
-    }
-
-    if ( multi > order ) {
-	// knot multiplicity greater than order of spline
-	return( 5 );
-    }
-
-    return 0;
-}
-
-void Knotvector::show( const char *msg )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "%s\n", msg );
-    _glu_dprintf( "order = %ld, count = %ld\n", order, knotcount );
-
-    for( int i=0; i<knotcount; i++ )
-	_glu_dprintf( "knot[%d] = %g\n", i, knotlist[i] );
-#endif
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/knotvector.h b/src/glu/sgi/libnurbs/internals/knotvector.h
deleted file mode 100644
index 85b162f6f11..00000000000
--- a/src/glu/sgi/libnurbs/internals/knotvector.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * knotvector.h
- *
- */
-
-#ifndef __gluknotvector_h_
-#define __gluknotvector_h_
-
-#include "types.h"
-
-struct Knotvector { /* a knot vector */
-			Knotvector( void );
-			~Knotvector( void );
-    void		init( long, long, long, INREAL * );
-    int			validate( void );
-    void 		show( const char * );
-
-    long		order;		/* order of spline  */
-    long		knotcount;	/* number of knots  */
-    long		stride;		/* bytes between points */
-    Knot *		knotlist;	/* global knot vector */
-};
-
-/* tolerance to test knot coincidence */
-#define TOLERANCE 		1.0e-5
-
-inline int 
-identical( Knot x, Knot y )
-{
-    return ((x-y) < TOLERANCE) ? 1 : 0;
-}
-#endif /* __gluknotvector_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/mapdesc.cc b/src/glu/sgi/libnurbs/internals/mapdesc.cc
deleted file mode 100644
index 0a96c5f45b8..00000000000
--- a/src/glu/sgi/libnurbs/internals/mapdesc.cc
+++ /dev/null
@@ -1,841 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * mapdesc.c++
- *
- */
-
-#include <stdio.h>
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "mystring.h"
-#include "mymath.h"
-#include "backend.h"
-#include "nurbsconsts.h"
-#include "mapdesc.h"
-
-Mapdesc::Mapdesc( long _type, int _israt, int _ncoords, Backend& b ) 
-    : backend( b )
-{
-    type 		= _type;
-    isrational 		= _israt;
-    ncoords 		= _ncoords;
-    hcoords		= _ncoords + (_israt ? 0 : 1 );
-    inhcoords		= _ncoords - (_israt ? 1 : 0 );
-    mask 		= ((1<<(inhcoords*2))-1);
-    next		= 0;
-
-    assert( hcoords <= MAXCOORDS );
-    assert( inhcoords >= 1 );
-
-    pixel_tolerance 	= 1.0;
-    error_tolerance	= 1.0;
-    bbox_subdividing	= N_NOBBOXSUBDIVISION;
-    culling_method 	= N_NOCULLING;		
-    sampling_method 	= N_NOSAMPLING;
-    clampfactor 	= N_NOCLAMPING;
-    minsavings 		= N_NOSAVINGSSUBDIVISION;
-    s_steps  		= 0.0;
-    t_steps 		= 0.0;
-    maxrate 		= ( s_steps < 0.0 ) ? 0.0 : s_steps;
-    maxsrate 		= ( s_steps < 0.0 ) ? 0.0 : s_steps;
-    maxtrate 		= ( t_steps < 0.0 ) ? 0.0 : t_steps;
-    identify( bmat );
-    identify( cmat );
-    identify( smat );
-    for( int i = 0; i != inhcoords; i++ )
-	bboxsize[i] = 1.0;
-}
-
-void
-Mapdesc::setBboxsize( INREAL *mat )
-{
-    for( int i = 0; i != inhcoords; i++ )
-	bboxsize[i] = (REAL) mat[i];
-}
-
-void
-Mapdesc::identify( REAL dest[MAXCOORDS][MAXCOORDS] )
-{
-    memset( dest, 0, sizeof( REAL ) * MAXCOORDS * MAXCOORDS );
-    for( int i=0; i != hcoords; i++ )
-	dest[i][i] = 1.0;
-}
-
-void
-Mapdesc::surfbbox( REAL bb[2][MAXCOORDS] )
-{
-    backend.surfbbox( type, bb[0], bb[1] );
-}
-
-void 
-Mapdesc::copy( REAL dest[MAXCOORDS][MAXCOORDS], long n, INREAL *src,
-	long rstride, long cstride )
-{
-    assert( n >= 0 );
-    for( int i=0; i != n; i++ )
-        for( int j=0; j != n; j++ )
-	    dest[i][j] = src[i*rstride + j*cstride];
-}
-
-/*--------------------------------------------------------------------------
- * copyPt - copy a homogeneous point
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::copyPt( REAL *d, REAL *s )
-{
-    assert( hcoords > 0 );
-    switch( hcoords  ) {
-	case 4: 
-	    d[3] = s[3];
-	    d[2] = s[2];
-	    d[1] = s[1];
-	    d[0] = s[0];
-	    break;
-	case 3: 
-	    d[2] = s[2];
-	    d[1] = s[1];
-	    d[0] = s[0];
-	    break;
-	case 2: 
-	    d[1] = s[1];
-	    d[0] = s[0];
-	    break;
-	case 1: 
-	    d[0] = s[0];
-	    break;
-	case 5: 
-	    d[4] = s[4];
-	    d[3] = s[3];
-	    d[2] = s[2];
-	    d[1] = s[1];
-	    d[0] = s[0];
-	    break;
-	default:
-	    memcpy( d, s, hcoords * sizeof( REAL ) );
-	    break;
-    }
-}
-
-/*--------------------------------------------------------------------------
- * sumPt - compute affine combination of two homogeneous points
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::sumPt( REAL *dst, REAL *src1, REAL *src2, register REAL alpha, register REAL beta )
-{
-    assert( hcoords > 0 );
-    switch( hcoords  ) {
-	case 4: 
-	    dst[3] = src1[3] * alpha + src2[3] * beta;
-	    dst[2] = src1[2] * alpha + src2[2] * beta;
-	    dst[1] = src1[1] * alpha + src2[1] * beta;
-	    dst[0] = src1[0] * alpha + src2[0] * beta;
-	    break;
-	case 3: 
-	    dst[2] = src1[2] * alpha + src2[2] * beta;
-	    dst[1] = src1[1] * alpha + src2[1] * beta;
-	    dst[0] = src1[0] * alpha + src2[0] * beta;
-	    break;
-	case 2: 
-	    dst[1] = src1[1] * alpha + src2[1] * beta;
-	    dst[0] = src1[0] * alpha + src2[0] * beta;
-	    break;
-	case 1: 
-	    dst[0] = src1[0] * alpha + src2[0] * beta;
-	    break;
-	case 5: 
-	    dst[4] = src1[4] * alpha + src2[4] * beta;
-	    dst[3] = src1[3] * alpha + src2[3] * beta;
-	    dst[2] = src1[2] * alpha + src2[2] * beta;
-	    dst[1] = src1[1] * alpha + src2[1] * beta;
-	    dst[0] = src1[0] * alpha + src2[0] * beta;
-	    break;
-	default: {
-		for( int i = 0; i != hcoords; i++ )
-		    dst[i] = src1[i] * alpha + src2[i] * beta;
-            }
-	    break;
-    }
-}
-
-/*--------------------------------------------------------------------------
- * clipbits - compute bit-vector indicating point/window position
- *		       of a (transformed) homogeneous point
- *--------------------------------------------------------------------------
- */
-unsigned int
-Mapdesc::clipbits( REAL *p )
-{
-    assert( inhcoords >= 0 );
-    assert( inhcoords <= 3 );
-
-    register int nc = inhcoords;
-    register REAL pw = p[nc];
-    register REAL nw = -pw;
-    register unsigned int bits = 0;
-
-    if( pw == 0.0 ) return mask;
-
-    if( pw > 0.0 ) {
-	switch( nc ) {
-	case 3:
-	    if( p[2] <= pw ) bits |= (1<<5);
-	    if( p[2] >= nw ) bits |= (1<<4);
-	    if( p[1] <= pw ) bits |= (1<<3);
-	    if( p[1] >= nw ) bits |= (1<<2);
-	    if( p[0] <= pw ) bits |= (1<<1);
-	    if( p[0] >= nw ) bits |= (1<<0);
-            return bits;
-	case 2:
-	    if( p[1] <= pw ) bits |= (1<<3);
-	    if( p[1] >= nw ) bits |= (1<<2);
-	    if( p[0] <= pw ) bits |= (1<<1);
-	    if( p[0] >= nw ) bits |= (1<<0);
-            return bits;
-	case 1:
-	    if( p[0] <= pw ) bits |= (1<<1);
-	    if( p[0] >= nw ) bits |= (1<<0);
-            return bits;
-	default: {
-		int bit = 1;
-		for( int i=0; i<nc; i++ ) {
-		    if( p[i] >= nw ) bits |= bit; 
-		    bit <<= 1;
-		    if( p[i] <= pw ) bits |= bit; 
-		    bit <<= 1;
-		}
-		abort();
-		break;
-	    }
-	}
-    } else { 
-	switch( nc ) {
-	case 3:
-	    if( p[2] <= nw ) bits |= (1<<5);
-	    if( p[2] >= pw ) bits |= (1<<4);
-	    if( p[1] <= nw ) bits |= (1<<3);
-	    if( p[1] >= pw ) bits |= (1<<2);
-	    if( p[0] <= nw ) bits |= (1<<1);
-	    if( p[0] >= pw ) bits |= (1<<0);
-            return bits;
-	case 2:
-	    if( p[1] <= nw ) bits |= (1<<3);
-	    if( p[1] >= pw ) bits |= (1<<2);
-	    if( p[0] <= nw ) bits |= (1<<1);
-	    if( p[0] >= pw ) bits |= (1<<0);
-            return bits;
-	case 1:
-	    if( p[0] <= nw ) bits |= (1<<1);
-	    if( p[0] >= pw ) bits |= (1<<0);
-            return bits;
-	default: {
-		int bit = 1; 
-		for( int i=0; i<nc; i++ ) {
-		    if( p[i] >= pw ) bits |= bit; 
-		    bit <<= 1;
-		    if( p[i] <= nw ) bits |= bit; 
-		    bit <<= 1;
-		}
-		abort();
-		break;
-	    }
-	}
-    }
-    return bits;
-}
-
-/*--------------------------------------------------------------------------
- * xformRational - transform a homogeneous point
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::xformRational( Maxmatrix mat, REAL *d, REAL *s )
-{
-    assert( hcoords >= 0 );
-
-    if( hcoords == 3 ) {
-	REAL x = s[0];
-	REAL y = s[1];
-	REAL z = s[2];
-	d[0] = x*mat[0][0]+y*mat[1][0]+z*mat[2][0];
-	d[1] = x*mat[0][1]+y*mat[1][1]+z*mat[2][1];
-	d[2] = x*mat[0][2]+y*mat[1][2]+z*mat[2][2];
-    } else if( hcoords == 4 ) {
-	REAL x = s[0];
-	REAL y = s[1];
-	REAL z = s[2];
-	REAL w = s[3];
-	d[0] = x*mat[0][0]+y*mat[1][0]+z*mat[2][0]+w*mat[3][0];
-	d[1] = x*mat[0][1]+y*mat[1][1]+z*mat[2][1]+w*mat[3][1];
-	d[2] = x*mat[0][2]+y*mat[1][2]+z*mat[2][2]+w*mat[3][2];
-	d[3] = x*mat[0][3]+y*mat[1][3]+z*mat[2][3]+w*mat[3][3];
-    } else {
-	for( int i=0; i != hcoords; i++ ) {
-	    d[i] = 0;
-	    for( int j = 0; j != hcoords; j++ )
-		d[i] += s[j] * mat[j][i];
-	}
-    }
-}
-
-/*--------------------------------------------------------------------------
- * xformNonrational - transform a inhomogeneous point to a homogeneous point
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::xformNonrational( Maxmatrix mat, REAL *d, REAL *s )
-{
-    if( inhcoords == 2 ) {
-	REAL x = s[0];
-	REAL y = s[1];
-	d[0] = x*mat[0][0]+y*mat[1][0]+mat[2][0];
-	d[1] = x*mat[0][1]+y*mat[1][1]+mat[2][1];
-	d[2] = x*mat[0][2]+y*mat[1][2]+mat[2][2];
-    } else if( inhcoords == 3 ) {
-	REAL x = s[0];
-	REAL y = s[1];
-	REAL z = s[2];
-	d[0] = x*mat[0][0]+y*mat[1][0]+z*mat[2][0]+mat[3][0];
-	d[1] = x*mat[0][1]+y*mat[1][1]+z*mat[2][1]+mat[3][1];
-	d[2] = x*mat[0][2]+y*mat[1][2]+z*mat[2][2]+mat[3][2];
-	d[3] = x*mat[0][3]+y*mat[1][3]+z*mat[2][3]+mat[3][3];
-    } else {
-        assert( inhcoords >= 0 );
-	for( int i=0; i != hcoords; i++ ) {
-	    d[i] = mat[inhcoords][i];
-	    for( int j = 0; j < inhcoords; j++ )
-		d[i] += s[j] * mat[j][i];
-	}
-    }
-}
-
-/*--------------------------------------------------------------------------
- * xformAndCullCheck - transform a set of points that may be EITHER 
- *	homogeneous or inhomogeneous depending on the map description and
- *	check if they are either completely inside, completely outside, 
- *	or intersecting the viewing frustrum.
- *--------------------------------------------------------------------------
- */
-int
-Mapdesc::xformAndCullCheck( 
-    REAL *pts, int uorder, int ustride, int vorder, int vstride )
-{
-    assert( uorder > 0 );
-    assert( vorder > 0 );
-
-    unsigned int inbits = mask;
-    unsigned int outbits = 0;
-
-    REAL *p = pts;
-    for( REAL *pend = p + uorder * ustride; p != pend; p += ustride ) {
-        REAL *q = p;
-        for( REAL *qend = q + vorder * vstride; q != qend; q += vstride ) {
-    	    REAL cpts[MAXCOORDS];
-	    xformCulling( cpts, q );
-	    unsigned int bits = clipbits( cpts );
-	    outbits |= bits;
-	    inbits &= bits;
-	    if( ( outbits == (unsigned int)mask ) && ( inbits != (unsigned int)mask ) ) return CULL_ACCEPT;
-	} 
-    }
-
-    if( outbits != (unsigned int)mask ) {
-	return CULL_TRIVIAL_REJECT;
-    } else if( inbits == (unsigned int)mask ) {
-	return CULL_TRIVIAL_ACCEPT;
-    } else {
-	return CULL_ACCEPT;
-    }
-}
-
-/*--------------------------------------------------------------------------
- * cullCheck - check if a set of homogeneous transformed points are 
- *	either completely inside, completely outside, 
- *	or intersecting the viewing frustrum.
- *--------------------------------------------------------------------------
- */
-int
-Mapdesc::cullCheck( REAL *pts, int uorder, int ustride, int vorder, int vstride )
-{
-    unsigned int inbits = mask;
-    unsigned int outbits  = 0;
-
-    REAL *p = pts;
-    for( REAL *pend = p + uorder * ustride; p != pend; p += ustride ) {
-        REAL *q = p;
-        for( REAL *qend = q + vorder * vstride; q != qend; q += vstride ) {
-	    unsigned int bits = clipbits( q );
-	    outbits |= bits;
-	    inbits &= bits;
-	    if( ( outbits == (unsigned int)mask ) && ( inbits != (unsigned int)mask ) ) return CULL_ACCEPT;
-	} 
-    }
-
-    if( outbits != (unsigned int)mask ) {
-	return CULL_TRIVIAL_REJECT;
-    } else if( inbits == (unsigned int)mask ) {
-	return CULL_TRIVIAL_ACCEPT;
-    } else {
-	return CULL_ACCEPT;
-    }
-}
-
-/*--------------------------------------------------------------------------
- * cullCheck - check if a set of homogeneous transformed points are 
- *	either completely inside, completely outside, 
- *	or intersecting the viewing frustrum.
- *--------------------------------------------------------------------------
- */
-int
-Mapdesc::cullCheck( REAL *pts, int order, int stride )
-{
-    unsigned int inbits = mask;
-    unsigned int outbits  = 0;
-
-    REAL *p = pts;
-    for( REAL *pend = p + order * stride; p != pend; p += stride ) {
-	unsigned int bits = clipbits( p );
-	outbits |= bits;
-	inbits &= bits;
-	if( ( outbits == (unsigned int)mask ) && ( inbits != (unsigned int)mask ) ) return CULL_ACCEPT;
-    }
-
-    if( outbits != (unsigned int)mask ) {
-	return CULL_TRIVIAL_REJECT;
-    } else if( inbits == (unsigned int)mask ) {
-	return CULL_TRIVIAL_ACCEPT;
-    } else {
-	return CULL_ACCEPT;
-    }
-}
-
-/*--------------------------------------------------------------------------
- * xformSampling - transform a set of points that may be EITHER 
- *	homogeneous or inhomogeneous depending on the map description 
- *	into sampling space 
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::xformSampling( REAL *pts, int order, int stride, REAL *sp, int outstride )
-{
-    xformMat( smat, pts, order, stride, sp, outstride );
-}
-
-void
-Mapdesc::xformBounding( REAL *pts, int order, int stride, REAL *sp, int outstride )
-{
-    xformMat( bmat, pts, order, stride, sp, outstride );
-}
-
-/*--------------------------------------------------------------------------
- * xformCulling - transform a set of points that may be EITHER 
- *	homogeneous or inhomogeneous depending on the map description 
- *	into culling space 
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::xformCulling( REAL *pts, int order, int stride, REAL *cp, int outstride )
-{
-    xformMat( cmat, pts, order, stride, cp, outstride );
-}
-
-/*--------------------------------------------------------------------------
- * xformCulling - transform a set of points that may be EITHER 
- *	homogeneous or inhomogeneous depending on the map description 
- *	into culling space 
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::xformCulling( REAL *pts, 
-    int uorder, int ustride,
-    int vorder, int vstride, 
-    REAL *cp, int outustride, int outvstride )
-{
-    xformMat( cmat, pts, uorder, ustride, vorder, vstride, cp, outustride, outvstride );
-}
-
-/*--------------------------------------------------------------------------
- * xformSampling - transform a set of points that may be EITHER 
- *	homogeneous or inhomogeneous depending on the map description 
- *	into sampling space 
- *--------------------------------------------------------------------------
- */
-void
-Mapdesc::xformSampling( REAL *pts, 
-    int uorder, int ustride, 
-    int vorder, int vstride, 
-    REAL *sp, int outustride, int outvstride )
-{
-    xformMat( smat, pts, uorder, ustride, vorder, vstride, sp, outustride, outvstride );
-}
-
-void
-Mapdesc::xformBounding( REAL *pts, 
-    int uorder, int ustride, 
-    int vorder, int vstride, 
-    REAL *sp, int outustride, int outvstride )
-{
-    xformMat( bmat, pts, uorder, ustride, vorder, vstride, sp, outustride, outvstride );
-}
-
-void
-Mapdesc::xformMat( 
-    Maxmatrix	mat, 
-    REAL *	pts, 
-    int 	order, 
-    int 	stride,
-    REAL *	cp, 
-    int 	outstride )
-{
-    if( isrational ) {
-	REAL *pend = pts + order * stride;
-	for( REAL *p = pts ; p != pend; p += stride ) {
-	    xformRational( mat, cp, p );
-	    cp += outstride;
-	}       
-    } else {
-	REAL *pend = pts + order * stride;
-	for( REAL *p = pts ; p != pend; p += stride ) {
-	    xformNonrational( mat, cp, p );
-	    cp += outstride;
-	}	
-    }
-}
-
-void
-Mapdesc::xformMat( Maxmatrix mat, REAL *pts, 
-    int uorder, int ustride, 
-    int vorder, int vstride, 
-    REAL *cp, int outustride, int outvstride )
-{
-    if( isrational ) {
-	REAL *pend = pts + uorder * ustride;
-	for( REAL *p = pts ; p != pend; p += ustride ) {
-	    REAL *cpts2 = cp;
-	    REAL *qend = p + vorder * vstride;
-	    for( REAL *q = p; q != qend; q += vstride ) {
-		xformRational( mat, cpts2, q );
-		cpts2 += outvstride;
-	    } 
-	    cp += outustride;
-	}
-    } else {
-	REAL *pend = pts + uorder * ustride;
-	for( REAL *p = pts ; p != pend; p += ustride ) {
-	    REAL *cpts2 = cp;
-	    REAL *qend = p + vorder * vstride;
-	    for( REAL *q = p; q != qend; q += vstride ) {
-		xformNonrational( mat, cpts2, q );
-		cpts2 += outvstride;
-	    } 
-	    cp += outustride;
-	}
-    }
-}
-
-/*--------------------------------------------------------------------------
- * subdivide - subdivide a curve along an isoparametric line
- *--------------------------------------------------------------------------
- */
-
-void
-Mapdesc::subdivide( REAL *src, REAL *dst, REAL v, int stride, int order )
-{
-    REAL mv = 1.0 - v;
-
-    for( REAL *send=src+stride*order; src!=send; send-=stride, dst+=stride ) {
-	copyPt( dst, src );
-	REAL *qpnt = src + stride;
-	for( REAL *qp=src; qpnt!=send; qp=qpnt, qpnt+=stride )
-	    sumPt( qp, qp, qpnt, mv, v );
-    }
-}
-
-/*--------------------------------------------------------------------------
- * subdivide - subdivide a patch along an isoparametric line
- *--------------------------------------------------------------------------
- */
-
-void
-Mapdesc::subdivide( REAL *src, REAL *dst, REAL v, 
-    int so, int ss, int to, int ts  )
-{
-    REAL mv = 1.0 - v;
-
-    for( REAL *slast = src+ss*so; src != slast; src += ss, dst += ss ) {
-	REAL *sp = src;
-	REAL *dp = dst;
-        for( REAL *send = src+ts*to; sp != send; send -= ts, dp += ts ) {
-	    copyPt( dp, sp );
-	    REAL *qp = sp;
-	    for( REAL *qpnt = sp+ts; qpnt != send; qp = qpnt, qpnt += ts )
-	        sumPt( qp, qp, qpnt, mv, v );
-	}
-    }
-}
-
-
-#define sign(x)	((x > 0) ? 1 : ((x < 0.0) ? -1 : 0))
-
-/*--------------------------------------------------------------------------
- * project - project a set of homogeneous coordinates into inhomogeneous ones
- *--------------------------------------------------------------------------
- */
-int
-Mapdesc::project( REAL *src, int rstride, int cstride, 
-	          REAL *dest, int trstride, int tcstride,
-		  int nrows, int ncols )
-{
-    int s = sign( src[inhcoords] );
-    REAL *rlast = src + nrows * rstride;
-    REAL *trptr = dest;
-    for( REAL *rptr=src; rptr != rlast; rptr+=rstride, trptr+=trstride ) {
-	REAL *clast = rptr + ncols * cstride;
-	REAL *tcptr = trptr;
-	for( REAL *cptr = rptr; cptr != clast; cptr+=cstride, tcptr+=tcstride ) {
-	    REAL *coordlast = cptr + inhcoords;
-	    if( sign( *coordlast ) != s ) return 0;
-	    REAL *tcoord = tcptr;
-	    for( REAL *coord = cptr; coord != coordlast; coord++, tcoord++ ) {
-		*tcoord = *coord / *coordlast;
-	    }
-	}
-    }
-    return 1;
-}
-
-/*--------------------------------------------------------------------------
- * project - project a set of homogeneous coordinates into inhomogeneous ones
- *--------------------------------------------------------------------------
- */
-int
-Mapdesc::project( REAL *src, int stride, REAL *dest, int tstride, int ncols )
-{
-    int s = sign( src[inhcoords] );
-
-    REAL *clast = src + ncols * stride;
-    for( REAL *cptr = src, *tcptr = dest; cptr != clast; cptr+=stride, tcptr+=tstride ) {
-	REAL *coordlast = cptr + inhcoords;
-	if( sign( *coordlast ) != s ) return 0;
-	for( REAL *coord = cptr, *tcoord = tcptr; coord != coordlast; coord++, tcoord++ ) 
-	    *tcoord = *coord / *coordlast;
-    }
-
-    return 1;
-}
-
-int
-Mapdesc::bboxTooBig( 
-    REAL *p, 
-    int	 rstride,
-    int	 cstride,
-    int	 nrows,
-    int	 ncols,
-    REAL bb[2][MAXCOORDS] )
-{
-    REAL bbpts[MAXORDER][MAXORDER][MAXCOORDS];
-    const int trstride = sizeof(bbpts[0]) / sizeof(REAL);
-    const int tcstride = sizeof(bbpts[0][0]) / sizeof(REAL); 
-
-    // points have been transformed, therefore they are homogeneous
-    // project points
-    int val = project( p, rstride, cstride, 
-	     &bbpts[0][0][0], trstride, tcstride, nrows, ncols );
-    if( val == 0 ) return -1;
-
-    // compute bounding box
-    bbox( bb, &bbpts[0][0][0], trstride, tcstride, nrows, ncols );
-
-    // find out if bounding box can't fit in unit cube
-    if( bbox_subdividing == N_BBOXROUND ) {
-	for( int k=0; k != inhcoords; k++ )
-	    if( ceilf(bb[1][k]) - floorf(bb[0][k]) > bboxsize[k] ) return 1;
-    } else {
-	for( int k=0; k != inhcoords; k++ )
-	    if( bb[1][k] - bb[0][k] > bboxsize[k] ) return 1;
-    }
-    return 0;  
-}
-
-void
-Mapdesc::bbox( 
-    REAL bb[2][MAXCOORDS], 
-    REAL *p, 
-    int	 rstride,
-    int	 cstride,
-    int	 nrows,
-    int	 ncols )
-{
-    int k;
-    for( k=0; k != inhcoords; k++ )
-	 bb[0][k] = bb[1][k] = p[k];
-
-    for( int i=0; i != nrows; i++ ) 
-	for( int j=0; j != ncols; j++ ) 
-	    for( k=0; k != inhcoords; k++ ) {
-		REAL x = p[i*rstride + j*cstride + k];
-		if(  x < bb[0][k] ) bb[0][k] = x;
-		else if( x > bb[1][k] ) bb[1][k] = x;
-	    }
-}
-
-/*--------------------------------------------------------------------------
- * calcVelocityRational - calculate upper bound on first partial derivative 
- *	of a homogeneous set of points and bounds on each row of points.
- *--------------------------------------------------------------------------
- */
-REAL
-Mapdesc::calcVelocityRational( REAL *p, int stride, int ncols )
-{
-    REAL tmp[MAXORDER][MAXCOORDS];
-
-    assert( ncols <= MAXORDER );
-
-    const int tstride = sizeof(tmp[0]) / sizeof(REAL); 
-
-    if( project( p, stride, &tmp[0][0], tstride, ncols ) ) {
-	return calcPartialVelocity( &tmp[0][0], tstride, ncols, 1, 1.0 );
-    } else { /* XXX */
-	return calcPartialVelocity( &tmp[0][0], tstride, ncols, 1, 1.0 );
-    }
-}
-
-/*--------------------------------------------------------------------------
- * calcVelocityNonrational - calculate upper bound on  first partial 
- *	derivative of a inhomogeneous set of points.
- *--------------------------------------------------------------------------
- */
-REAL
-Mapdesc::calcVelocityNonrational( REAL *pts, int stride, int ncols )
-{
-    return calcPartialVelocity( pts, stride, ncols, 1, 1.0 );
-}
-
-int
-Mapdesc::isProperty( long property )
-{
-    switch ( property ) {
-	case N_PIXEL_TOLERANCE:
-	case N_ERROR_TOLERANCE:
-	case N_CULLING:
-	case N_BBOX_SUBDIVIDING:
-	case N_S_STEPS:
-	case N_T_STEPS:
-        case N_SAMPLINGMETHOD:
-        case N_CLAMPFACTOR:
-        case N_MINSAVINGS:
-	    return 1;
-	default:
-	    return 0;
-    }
-}
-
-REAL
-Mapdesc::getProperty( long property )
-{
-    switch ( property ) {
-	case N_PIXEL_TOLERANCE:
-	    return pixel_tolerance;
-	case N_ERROR_TOLERANCE:
-	    return error_tolerance;
-	case N_CULLING:
-	    return culling_method;
-	case N_BBOX_SUBDIVIDING:
-	    return bbox_subdividing;
-	case N_S_STEPS:
-	    return s_steps;
-	case N_T_STEPS:
-	    return t_steps;
-        case N_SAMPLINGMETHOD:
-	    return sampling_method;
-        case N_CLAMPFACTOR:
-	    return clampfactor;
-        case N_MINSAVINGS:
-	    return minsavings;
-	default:
-	    abort();
-	    return -1; //not necessary, needed to shut up compiler
-    }
-}
-
-void
-Mapdesc::setProperty( long property, REAL value )
-{
-
-    switch ( property ) {
-	case N_PIXEL_TOLERANCE:
-	    pixel_tolerance = value;
-	    break;
-	case N_ERROR_TOLERANCE:
-	    error_tolerance = value;
-	    break;
-	case N_CULLING:
-	    culling_method = value;
-	    break;
-	case N_BBOX_SUBDIVIDING:
-	    if( value <= 0.0 ) value = N_NOBBOXSUBDIVISION;
-	    bbox_subdividing = value;
-	    break;
-	case N_S_STEPS:
-	    if( value < 0.0 ) value = 0.0;
-	    s_steps = value;
-	    maxrate = ( value < 0.0 ) ? 0.0 : value;
-	    maxsrate = ( value < 0.0 ) ? 0.0 : value;
-	    break;
-	case N_T_STEPS:
-	    if( value < 0.0 ) value = 0.0;
-	    t_steps = value;
-	    maxtrate = ( value < 0.0 ) ? 0.0 : value;
-	    break;
-	case N_SAMPLINGMETHOD:
-	    sampling_method = value;
-	    break;
-	case N_CLAMPFACTOR:
-	    if( value <= 0.0 ) value = N_NOCLAMPING;
-	    clampfactor = value;
-	    break;
-	case N_MINSAVINGS:
-	    if( value <= 0.0 ) value = N_NOSAVINGSSUBDIVISION;
-	    minsavings = value;
-	    break;
-	default:
-	    abort();
-	    break;
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/mapdesc.h b/src/glu/sgi/libnurbs/internals/mapdesc.h
deleted file mode 100644
index 6f06154f92a..00000000000
--- a/src/glu/sgi/libnurbs/internals/mapdesc.h
+++ /dev/null
@@ -1,271 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mapdesc.h
- *
- */
-
-#ifndef __glumapdesc_h_
-#define __glumapdesc_h_
-
-#include "mystdio.h"
-#include "types.h"
-#include "defines.h"
-#include "bufpool.h"
-#include "nurbsconsts.h"
-
-typedef REAL Maxmatrix[MAXCOORDS][MAXCOORDS];
-
-class Backend;
-
-class Mapdesc : public PooledObj {
-    friend class Maplist;
-			
-public:
-    			Mapdesc( long, int, int, Backend & );
-    int			isProperty( long );
-    REAL		getProperty( long );
-    void		setProperty( long, REAL );
-    int			isConstantSampling( void );
-    int			isDomainSampling( void );
-    int			isRangeSampling( void );
-    int			isSampling( void );
-    int			isParametricDistanceSampling( void );
-    int			isObjectSpaceParaSampling( void );
-    int			isObjectSpacePathSampling( void );
-    int			isSurfaceAreaSampling( void );
-    int			isPathLengthSampling( void );
-    int			isCulling( void );
-    int			isBboxSubdividing( void );
-    long		getType( void );
-
-    /* curve routines */
-    void		subdivide( REAL *, REAL *, REAL, int, int );
-    int 		cullCheck( REAL *, int, int );
-    void		xformBounding( REAL *, int, int, REAL *, int );
-    void		xformCulling( REAL *, int, int, REAL *, int );
-    void		xformSampling( REAL *, int, int, REAL *, int );
-    void		xformMat( Maxmatrix, REAL *, int, int, REAL *, int );
-    REAL		calcPartialVelocity ( REAL *, int, int, int, REAL );
-    int			project( REAL *, int, REAL *, int, int );
-    REAL		calcVelocityRational( REAL *, int, int );
-    REAL		calcVelocityNonrational( REAL *, int, int );
-
-    /* surface routines */
-    void		subdivide( REAL *, REAL *, REAL, int, int, int, int );
-    int 		cullCheck( REAL *, int, int, int, int );
-    void		xformBounding( REAL *, int, int, int, int, REAL *, int, int );
-    void		xformCulling( REAL *, int, int, int, int, REAL *, int, int );
-    void		xformSampling( REAL *, int, int, int, int, REAL *, int, int );
-    void		xformMat( Maxmatrix, REAL *, int, int, int, int, REAL *, int, int );
-    REAL		calcPartialVelocity ( REAL *, REAL *, int, int, int, int, int, int, REAL, REAL, int );
-    int 		project( REAL *, int, int, REAL *, int, int, int, int);
-    void		surfbbox( REAL bb[2][MAXCOORDS] );
-
-    int			bboxTooBig( REAL *, int, int, int, int, REAL [2][MAXCOORDS] );
-    int 		xformAndCullCheck( REAL *, int, int, int, int );
-
-    void		identify( REAL[MAXCOORDS][MAXCOORDS] );
-    void		setBboxsize( INREAL *);
-    inline void 	setBmat( INREAL*, long, long );
-    inline void 	setCmat( INREAL*, long, long );
-    inline void 	setSmat( INREAL*, long, long );
-    inline int		isRational( void );
-    inline int		getNcoords( void );
-
-    REAL 		pixel_tolerance;    /* pathlength sampling tolerance */
-    REAL		error_tolerance;    /* parametric error sampling tolerance*/
-    REAL		object_space_error_tolerance;    /* object space tess*/
-    REAL 		clampfactor;
-    REAL 		minsavings;
-    REAL		maxrate;
-    REAL		maxsrate;
-    REAL		maxtrate;
-    REAL		bboxsize[MAXCOORDS];
-
-private:
-    long 		type;
-    int 		isrational;
-    int 		ncoords;
-    int 		hcoords;
-    int 		inhcoords;
-    int			mask;
-    Maxmatrix 		bmat;
-    Maxmatrix 		cmat;
-    Maxmatrix 		smat;
-    REAL 		s_steps;		/* max samples in s direction */
-    REAL 		t_steps;		/* max samples in t direction */
-    REAL 		sampling_method;	
-    REAL 		culling_method;		/* check for culling */
-    REAL		bbox_subdividing;
-    Mapdesc *		next;
-    Backend &		backend;
-
-    void		bbox( REAL [2][MAXCOORDS], REAL *, int, int, int, int );
-    REAL		maxDifference( int, REAL *, int );
-    static void 	copy( Maxmatrix, long, INREAL *, long, long );
-
-    /* individual control point routines */
-    static void		transform4d( float[4], float[4], float[4][4] );
-    static void		multmatrix4d ( float[4][4], const float[4][4],
-					 const float[4][4] );
-    void		copyPt( REAL *, REAL * );
-    void		sumPt( REAL *, REAL *, REAL *, REAL, REAL );
-    void		xformSampling( REAL *, REAL * );
-    void		xformCulling( REAL *, REAL * );
-    void		xformRational( Maxmatrix, REAL *, REAL * );
-    void		xformNonrational( Maxmatrix, REAL *, REAL * );
-    unsigned int	clipbits( REAL * );
-};
-
-inline void
-Mapdesc::setBmat( INREAL *mat, long rstride, long cstride )
-{
-    copy( bmat, hcoords, mat, rstride, cstride );
-}
-
-inline void
-Mapdesc::setCmat( INREAL *mat, long rstride, long cstride )
-{
-    copy( cmat, hcoords, mat, rstride, cstride );
-}
-
-inline void
-Mapdesc::setSmat( INREAL *mat, long rstride, long cstride )
-{
-    copy( smat, hcoords, mat, rstride, cstride );
-}
-
-inline long
-Mapdesc::getType( void )
-{
-    return type;
-}
-
-inline void
-Mapdesc::xformCulling( REAL *d, REAL *s )
-{
-    if( isrational )
-        xformRational( cmat, d, s );
-    else
-	xformNonrational( cmat, d, s );
-}
-
-inline void
-Mapdesc::xformSampling( REAL *d, REAL *s )
-{
-    if( isrational )
-        xformRational( smat, d, s );
-    else
-	xformNonrational( smat, d, s );
-}
-
-inline int 
-Mapdesc::isRational( void )
-{
-    return isrational ? 1 : 0;
-}
-
-inline int		
-Mapdesc::getNcoords( void ) 
-{
-    return ncoords; 
-}
-
-inline int			
-Mapdesc::isConstantSampling( void ) 
-{
-    return ((sampling_method == N_FIXEDRATE) ? 1 : 0); 
-}
-
-inline int			
-Mapdesc::isDomainSampling( void ) 
-{ 
-    return ((sampling_method == N_DOMAINDISTANCE) ? 1 : 0); 
-}
-
-inline int			
-Mapdesc::isParametricDistanceSampling( void ) 
-{
-    return ((sampling_method == N_PARAMETRICDISTANCE) ? 1 : 0);
-}
-
-inline int			
-Mapdesc::isObjectSpaceParaSampling( void ) 
-{
-    return ((sampling_method == N_OBJECTSPACE_PARA) ? 1 : 0);
-}
-
-inline int			
-Mapdesc::isObjectSpacePathSampling( void ) 
-{
-    return ((sampling_method == N_OBJECTSPACE_PATH) ? 1 : 0);
-}
-
-inline int			
-Mapdesc::isSurfaceAreaSampling( void ) 
-{
-    return ((sampling_method == N_SURFACEAREA) ? 1 : 0);
-}
-
-inline int			
-Mapdesc::isPathLengthSampling( void ) 
-{
-    return ((sampling_method == N_PATHLENGTH) ? 1 : 0);
-}
-
-inline int			
-Mapdesc::isRangeSampling( void ) 
-{
-    return ( isParametricDistanceSampling() || isPathLengthSampling() ||
-	    isSurfaceAreaSampling() ||
-	    isObjectSpaceParaSampling() ||
-	    isObjectSpacePathSampling());
-}
-
-inline int
-Mapdesc::isSampling( void )
-{
-    return isRangeSampling() || isConstantSampling() || isDomainSampling();
-}
-
-inline int			
-Mapdesc::isCulling( void ) 
-{
-    return ((culling_method != N_NOCULLING) ? 1 : 0);
-}
-
-inline int			
-Mapdesc::isBboxSubdividing( void ) 
-{
-    return ((bbox_subdividing != N_NOBBOXSUBDIVISION) ? 1 : 0);
-}
-#endif /* __glumapdesc_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/mapdescv.cc b/src/glu/sgi/libnurbs/internals/mapdescv.cc
deleted file mode 100644
index 35b38b141b7..00000000000
--- a/src/glu/sgi/libnurbs/internals/mapdescv.cc
+++ /dev/null
@@ -1,243 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * mapdescv.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "mystring.h"
-#include "mymath.h"
-#include "nurbsconsts.h"
-#include "mapdesc.h"
-
-/*--------------------------------------------------------------------------
- * calcPartialVelocity - calculate maximum magnitude of a given partial
- * derivative
- *--------------------------------------------------------------------------
- */
-REAL
-Mapdesc::calcPartialVelocity (
-    REAL *p,
-    int	 stride,
-    int	 ncols,
-    int  partial,
-    REAL range )
-{
-    REAL tmp[MAXORDER][MAXCOORDS];
-    REAL mag[MAXORDER];
-
-    assert( ncols <= MAXORDER );
-
-    int j, k, t;
-    // copy inhomogeneous control points into temporary array
-    for( j=0; j != ncols; j++ ) 
-	for( k=0; k != inhcoords; k++ )
-	    tmp[j][k] = p[j*stride + k];
-
-    for( t=0; t != partial; t++ ) 
-	for( j=0; j != ncols-t-1; j++ ) 
-	    for( k=0; k != inhcoords; k++ ) 
-		tmp[j][k] = tmp[j+1][k] - tmp[j][k];
-
-    // compute magnitude and store in mag array
-    for( j=0; j != ncols-partial; j++ ) {
-	mag[j] = 0.0;
-	for( k=0; k != inhcoords; k++ )
-	    mag[j] += tmp[j][k] * tmp[j][k];
-    }
-
-    // compute scale factor
-    REAL fac = 1;
-    REAL invt = 1.0 / range;
-    for( t = ncols-1; t != ncols-1-partial; t-- ) 
-	fac *= t * invt;
-
-    // compute max magnitude of all entries in array
-    REAL max = 0.0;
-    for( j=0; j != ncols-partial; j++ )
-	if( mag[j] > max ) max = mag[j];
-    max = fac * sqrtf( (float) max );
-
-    return max;
-}
-
-/*--------------------------------------------------------------------------
- * calcPartialVelocity - calculate maximum magnitude of a given partial
- * derivative
- *--------------------------------------------------------------------------
- */
-REAL
-Mapdesc::calcPartialVelocity (
-    REAL *dist,
-    REAL *p,
-    int	 rstride,
-    int	 cstride,
-    int	 nrows,
-    int	 ncols,
-    int  spartial,
-    int  tpartial,
-    REAL srange, 
-    REAL trange,
-    int  side )
-{
-    REAL tmp[MAXORDER][MAXORDER][MAXCOORDS];
-    REAL mag[MAXORDER][MAXORDER];
-
-    assert( nrows <= MAXORDER );
-    assert( ncols <= MAXORDER );
-
-    REAL *tp = &tmp[0][0][0];
-    REAL *mp = &mag[0][0];
-    const int istride = sizeof( tmp[0]) / sizeof( tmp[0][0][0] );
-    const int jstride = sizeof( tmp[0][0]) / sizeof( tmp[0][0][0] );
-    /*
-    const int kstride = sizeof( tmp[0][0][0]) / sizeof( tmp[0][0][0] );
-    */
-    const int mistride = sizeof( mag[0]) / sizeof( mag[0][0] );
-    const int mjstride = sizeof( mag[0][0]) / sizeof( mag[0][0] );
-    const int idist = nrows * istride;
-    const int jdist = ncols * jstride;
-    /*
-    const int kdist = inhcoords * kstride;
-    */
-    const int id = idist - spartial * istride;
-    const int jd = jdist - tpartial * jstride;
-
-    {
-	// copy control points
-	REAL *ti = tp;
-	REAL *qi = p;
-	REAL *til = tp + idist;
-	for( ; ti != til; ) {
-	    REAL *tj = ti;
-	    REAL *qj = qi;
-	    REAL *tjl = ti + jdist;
-	    for( ; tj != tjl;  ) {
-		for( int k=0; k != inhcoords; k++ ) {
-		    tj[k] = qj[k];
-		}
-		tj += jstride;
-		qj += cstride;
-	    }
-	    ti += istride;
-	    qi += rstride; 
-	}
-    }
-
-    {
-        // compute (s)-partial derivative control points
-	REAL *til = tp + idist - istride;
-	const REAL *till = til - ( spartial * istride );
-	for( ; til != till; til -= istride )
-	    for( REAL *ti = tp; ti != til; ti += istride )
-		for( REAL *tj = ti, *tjl = tj + jdist; tj != tjl; tj += jstride )
-		    for( int k=0; k != inhcoords; k++ )
-			tj[k] = tj[k+istride] - tj[k];
-    }
-
-    {
-        // compute (s,t)-partial derivative control points
-	REAL *tjl = tp + jdist - jstride;
-	const REAL *tjll = tjl - ( tpartial * jstride );
-	for( ; tjl != tjll; tjl -= jstride )
-	    for( REAL *tj = tp; tj != tjl; tj += jstride )
-		for( REAL *ti = tj, *til = ti + id; ti != til; ti += istride )
-		    for( int k=0; k != inhcoords; k++ ) 
-			ti[k] = ti[k+jstride] - ti[k];
-
-    }
-
-    REAL max = 0.0;
-    {
-	// compute magnitude and store in mag array
-	memset( (void *) mp, 0, sizeof( mag ) );
-	for( REAL *ti = tp, *mi = mp, *til = tp + id; ti != til; ti += istride, mi += mistride )
-	    for( REAL *tj = ti, *mj = mi, *tjl = ti + jd; tj != tjl; tj += jstride, mj += mjstride ) {
-		for( int k=0; k != inhcoords; k++ )
-		   *mj += tj[k] * tj[k];
-		if( *mj > max ) max = *mj;
-	    }
-
-    }
-
-    int i, j;
-
-    // compute scale factor
-    REAL fac = 1.0;
-    {
-	REAL invs = 1.0 / srange;
-	REAL invt = 1.0 / trange;
-	for( int s = nrows-1, slast = s-spartial; s != slast; s-- ) 
-	    fac *= s * invs;
-	for( int t = ncols-1, tlast = t-tpartial; t != tlast; t-- ) 
-	    fac *= t * invt;
-    }
-
-    if( side == 0 ) {
-	// compute max magnitude of first and last column
-	dist[0] = 0.0;
-	dist[1] = 0.0;
-	for( i=0; i != nrows-spartial; i++ ) {
-	    j = 0;
-	    if( mag[i][j] > dist[0] ) dist[0] = mag[i][j];
-    
-	    j = ncols-tpartial-1;
-	    if( mag[i][j] > dist[1] ) dist[1] = mag[i][j];
-	}
-	dist[0] = fac * sqrtf( dist[0] );
-	dist[1] = fac * sqrtf( dist[1] );
-    } else if( side == 1 ) {
-	// compute max magnitude of first and last row
-	dist[0] = 0.0;
-	dist[1] = 0.0;
-	for( j=0; j != ncols-tpartial; j++ ) {
-	    i = 0;
-	    if( mag[i][j] > dist[0] ) dist[0] = mag[i][j];
-    
-	    i = nrows-spartial-1;
-	    if( mag[i][j] > dist[1] ) dist[1] = mag[i][j];
-	}
-	dist[0] = fac * sqrtf( dist[0] );
-	dist[1] = fac * sqrtf( dist[1] );
-    }
-
-    max = fac * sqrtf( (float) max );
-
-    return max;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/maplist.cc b/src/glu/sgi/libnurbs/internals/maplist.cc
deleted file mode 100644
index e51a3e85d0c..00000000000
--- a/src/glu/sgi/libnurbs/internals/maplist.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * maplist.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "mymath.h"
-#include "nurbsconsts.h"
-#include "maplist.h"
-#include "mapdesc.h"
- 
-Maplist::Maplist( Backend& b )
-    : mapdescPool( sizeof( Mapdesc ), 10, "mapdesc pool" ),
-      backend( b )
-{
-    maps = 0; lastmap = &maps;
-}
-
-void 
-Maplist::initialize( void )
-{
-    freeMaps();
-    define( N_P2D, 0, 2 );
-    define( N_P2DR, 1, 3 );
-}
-
-void 
-Maplist::add( long type, int israt, int ncoords )
-{
-    *lastmap = new(mapdescPool) Mapdesc( type, israt, ncoords, backend );
-    lastmap = &((*lastmap)->next);
-}
-
-void 
-Maplist::define( long type, int israt, int ncoords )
-{
-#ifndef NDEBUG // to avoid warning
-    Mapdesc *m = locate( type );
-    assert( m == NULL || ( m->isrational == israt && m->ncoords == ncoords ) );
-#endif
-    add( type, israt, ncoords );
-}
-
-void 
-Maplist::remove( Mapdesc *m )
-{
-    for( Mapdesc **curmap = &maps; *curmap; curmap = &((*curmap)->next) ) {
-	if( *curmap == m ) {
-	    *curmap = m->next;
-	    m->deleteMe( mapdescPool );
-	    return;
-	}
-    }
-    abort();
-}
-
-void
-Maplist::freeMaps( void )
-{
-    mapdescPool.clear();
-    maps = 0;
-    lastmap = &maps;
-}
-
-Mapdesc * 
-Maplist::find( long type )
-{
-    Mapdesc *val = locate( type );
-    assert( val != 0 );
-    return val;
-}
-
-Mapdesc * 
-Maplist::locate( long type )
-{
-    Mapdesc *m;
-    for( m = maps; m; m = m->next )
-	if( m->getType() == type ) break;
-    return m;
-}
diff --git a/src/glu/sgi/libnurbs/internals/maplist.h b/src/glu/sgi/libnurbs/internals/maplist.h
deleted file mode 100644
index 49720e49b42..00000000000
--- a/src/glu/sgi/libnurbs/internals/maplist.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * maplist.h
- *
- */
-
-#ifndef __glumaplist_h_
-#define __glumaplist_h_
-
-#include "types.h"
-#include "defines.h"
-#include "bufpool.h"
-
-class Backend;
-class Mapdesc;
-
-class Maplist {
-public:
-			Maplist( Backend & );
-    void 		define( long, int, int );
-    inline void 	undefine( long );
-    inline int		isMap( long );
-
-    void 		initialize( void );
-    Mapdesc * 		find( long );
-    Mapdesc * 		locate( long );
-
-private:
-    Pool		mapdescPool;
-    Mapdesc *		maps;
-    Mapdesc **		lastmap;
-    Backend &		backend;
-
-    void 		add( long, int, int );
-    void 		remove( Mapdesc * );
-    void		freeMaps( void );
-};
-
-inline int
-Maplist::isMap( long type )
-{
-    return (locate( type ) ? 1 : 0);
-}
-
-inline void 
-Maplist::undefine( long type )
-{
-    Mapdesc *m = locate( type );
-    assert( m != 0 );
-    remove( m );
-}
-#endif /* __glumaplist_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/mesher.cc b/src/glu/sgi/libnurbs/internals/mesher.cc
deleted file mode 100644
index b2d83f41288..00000000000
--- a/src/glu/sgi/libnurbs/internals/mesher.cc
+++ /dev/null
@@ -1,489 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * mesher.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "gridvertex.h"
-#include "gridtrimvertex.h"
-#include "jarcloc.h"
-#include "gridline.h"
-#include "trimline.h"
-#include "uarray.h"
-#include "backend.h"
-#include "mesher.h"
-
-
-const float Mesher::ZERO = 0.0;
-
-Mesher::Mesher( Backend& b ) 
-	: backend( b ), 
-	p( sizeof( GridTrimVertex ), 100, "GridTrimVertexPool" )
-{
-    stacksize = 0;
-    vdata = 0;
-    last[0] = 0;
-    last[1] = 0;
-    itop = 0;
-    lastedge = 0; //needed to prevent purify UMR 
-}
-
-Mesher::~Mesher( void )
-{
-    if( vdata ) delete[] vdata;
-}
-
-void 
-Mesher::init( unsigned int npts )
-{
-    p.clear();
-    if( stacksize < npts ) {
-	stacksize = 2 * npts;
-	if( vdata ) delete[] vdata;		
-	vdata = new GridTrimVertex_p[stacksize];
-    } 
-}
-
-inline void
-Mesher::push( GridTrimVertex *gt )
-{
-    assert( itop+1 != (int)stacksize );
-    vdata[++itop] = gt;
-}
-
-inline void
-Mesher::pop( long )
-{
-}
-
-inline void
-Mesher::openMesh()
-{
-    backend.bgntmesh( "addedge" );
-}
-
-inline void
-Mesher::closeMesh()
-{
-    backend.endtmesh();
-}
-
-inline void
-Mesher::swapMesh()
-{
-    backend.swaptmesh();
-}
-
-inline void
-Mesher::clearStack()
-{
-    itop = -1;
-    last[0] = 0;
-}
-
-void
-Mesher::finishLower( GridTrimVertex *gtlower )
-{
-    for( push(gtlower); 
-	 nextlower( gtlower=new(p) GridTrimVertex ); 
-	 push(gtlower) ) 
-	    addLower();
-    addLast();
-}
-
-void
-Mesher::finishUpper( GridTrimVertex *gtupper )
-{
-    for( push(gtupper); 
-	 nextupper( gtupper=new(p) GridTrimVertex ); 
-	 push(gtupper) ) 
-	    addUpper();
-    addLast();
-}
-
-void
-Mesher::mesh( void )
-{
-    GridTrimVertex *gtlower, *gtupper;
-
-    Hull::init( );
-    nextupper( gtupper = new(p) GridTrimVertex );
-    nextlower( gtlower = new(p) GridTrimVertex );
-
-    clearStack();
-    openMesh();
-    push(gtupper);
-
-    nextupper( gtupper = new(p) GridTrimVertex );
-    nextlower( gtlower );
-
-    assert( gtupper->t && gtlower->t );
-    
-    if( gtupper->t->param[0] < gtlower->t->param[0] ) {
-	push(gtupper);
-	lastedge = 1;
-	if( nextupper( gtupper=new(p) GridTrimVertex ) == 0 ) {
-	    finishLower(gtlower);
-	    return;
-	}
-    } else if( gtupper->t->param[0] > gtlower->t->param[0] ) {
-	push(gtlower);
-	lastedge = 0;
-	if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) {
-	    finishUpper(gtupper);
-	    return;
-	}
-    } else {
-	if( lastedge == 0 ) {
-	    push(gtupper);
-	    lastedge = 1;
-	    if( nextupper(gtupper=new(p) GridTrimVertex) == 0 ) {
-		finishLower(gtlower);
-		return;
-	    }
-	} else {
-	    push(gtlower);
-	    lastedge = 0;
-	    if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) {
-		finishUpper(gtupper);
-		return;
-	    }
-	}
-    }
-
-    while ( 1 ) {
-	if( gtupper->t->param[0] < gtlower->t->param[0] ) {
-            push(gtupper);
-	    addUpper();
-	    if( nextupper( gtupper=new(p) GridTrimVertex ) == 0 ) {
-		finishLower(gtlower);
-		return;
-	    }
-	} else if( gtupper->t->param[0] > gtlower->t->param[0] ) {
-    	    push(gtlower);
-	    addLower();
-	    if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) {
-		finishUpper(gtupper);
-		return;
-	    }
-	} else {
-	    if( lastedge == 0 ) {
-		push(gtupper);
-		addUpper();
-		if( nextupper( gtupper=new(p) GridTrimVertex ) == 0 ) {
-		    finishLower(gtlower);
-		    return;
-		}
-	    } else {
-		push(gtlower);
-		addLower();
-		if( nextlower( gtlower=new(p) GridTrimVertex ) == 0 ) {
-		    finishUpper(gtupper);
-		    return;
-		}
-	    }
-	}
-    }
-}
-
-inline int
-Mesher::isCcw( int ilast )
-{
-    REAL area = det3( vdata[ilast]->t, vdata[itop-1]->t, vdata[itop-2]->t );
-    return (area < ZERO) ? 0 : 1;
-}
-
-inline int
-Mesher::isCw( int ilast  )
-{
-    REAL area = det3( vdata[ilast]->t, vdata[itop-1]->t, vdata[itop-2]->t );
-    return (area > -ZERO) ? 0 : 1;
-}
-
-inline int
-Mesher::equal( int x, int y )
-{
-    return( last[0] == vdata[x] && last[1] == vdata[y] );
-}
-
-inline void
-Mesher::copy( int x, int y )
-{
-    last[0] = vdata[x]; last[1] = vdata[y];
-}
- 
-inline void
-Mesher::move( int x, int y ) 
-{
-    vdata[x] = vdata[y];
-}
-
-inline void
-Mesher::output( int x )
-{
-    backend.tmeshvert( vdata[x] );
-}
-
-/*---------------------------------------------------------------------------
- * addedge - addedge an edge to the triangulation
- *
- *	This code has been re-written to generate large triangle meshes
- *	from a monotone polygon.  Although smaller triangle meshes
- *	could be generated faster and with less code, larger meshes
- *	actually give better SYSTEM performance.  This is because
- *	vertices are processed in the backend slower than they are
- *	generated by this code and any decrease in the number of vertices
- *	results in a decrease in the time spent in the backend.
- *---------------------------------------------------------------------------
- */
-
-void
-Mesher::addLast( )
-{
-    register int ilast = itop;
-
-    if( lastedge == 0 ) {
-	if( equal( 0, 1 ) ) {
-	    output( ilast );
-	    swapMesh();
-	    for( register int i = 2; i < ilast; i++ ) {
-		swapMesh();
-		output( i );
-	    }
-	    copy( ilast, ilast-1 );
-	} else if( equal( ilast-2, ilast-1) ) {
-	    swapMesh();
-	    output( ilast );
-	    for( register int i = ilast-3; i >= 0; i-- ) {
-		output( i );
-		swapMesh();
-	    }
-	    copy( 0, ilast );
-	} else {
-	    closeMesh();	openMesh();
-	    output( ilast );
-	    output( 0 );
-	    for( register int i = 1; i < ilast; i++ ) {
-		swapMesh();
-		output( i );
-	    }
-	    copy( ilast, ilast-1 );
-	}
-    } else {
-	if( equal( 1, 0) ) {
-	    swapMesh();
-	    output( ilast );
-	    for( register int i = 2; i < ilast; i++ ) {
-		output( i );
-		swapMesh();
-	    }
-	    copy( ilast-1, ilast );
-	} else if( equal( ilast-1, ilast-2) ) {
-	    output( ilast );
-	    swapMesh();
-	    for( register int i = ilast-3; i >= 0; i-- ) {
-		swapMesh();
-		output( i );
-	    }
-	    copy( ilast, 0 );
-	} else {
-	    closeMesh();	openMesh();
-	    output( 0 );
-	    output( ilast );
-	    for( register int i = 1; i < ilast; i++ ) {
-		output( i );
-		swapMesh();
-	    }
-	    copy( ilast-1, ilast );
-	}
-    }
-    closeMesh();
-    //for( register long k=0; k<=ilast; k++ ) pop( k );
-}
-
-void
-Mesher::addUpper( )
-{
-    register int ilast = itop;
-
-    if( lastedge == 0 ) {
-	if( equal( 0, 1 ) ) {
-	    output( ilast );
-	    swapMesh();
-	    for( register int i = 2; i < ilast; i++ ) {
-		swapMesh();
-		output( i );
-	    }
-	    copy( ilast, ilast-1 );
-	} else if( equal( ilast-2, ilast-1) ) {
-	    swapMesh();
-	    output( ilast );
-	    for( register int i = ilast-3; i >= 0; i-- ) {
-		output( i );
-		swapMesh();
-	    }
-	    copy( 0, ilast );
-	} else {
-	    closeMesh();	openMesh();
-	    output( ilast );
-	    output( 0 );
-	    for( register int i = 1; i < ilast; i++ ) {
-		swapMesh();
-		output( i );
-	    }
-	    copy( ilast, ilast-1 );
-	}
-	lastedge = 1;
-        //for( register long k=0; k<ilast-1; k++ ) pop( k );
-	move( 0, ilast-1 );
-	move( 1, ilast );
-	itop = 1;
-    } else {
-	if( ! isCcw( ilast ) ) return;
-	do {
-	    itop--;
-	} while( (itop > 1) && isCcw( ilast ) );
-
-	if( equal( ilast-1, ilast-2 ) ) {
-	    output( ilast );
-	    swapMesh();
-	    for( register int i=ilast-3; i>=itop-1; i-- ) {
-		swapMesh();
-		output( i );
-	    }
-	    copy( ilast, itop-1 );
-	} else if( equal( itop, itop-1 ) ) {
-	    swapMesh();
-	    output( ilast );
-	    for( register int i = itop+1; i < ilast; i++ ) {
-		output( i );
-		swapMesh();
-	    }
-	    copy( ilast-1, ilast );
-	} else {
-	    closeMesh();	openMesh();
-	    output( ilast );
-	    output( ilast-1 );
-	    for( register int i=ilast-2; i>=itop-1; i-- ) {
-		swapMesh();
-		output( i );
-	    } 
-	    copy( ilast, itop-1 );
-	}
-        //for( register int k=itop; k<ilast; k++ ) pop( k );
-	move( itop, ilast );
-    }
-}
-
-void
-Mesher::addLower()
-{
-    register int ilast = itop;
-
-    if( lastedge == 1 ) {
-	if( equal( 1, 0) ) {
-	    swapMesh();
-	    output( ilast );
-	    for( register int i = 2; i < ilast; i++ ) {
-		output( i );
-		swapMesh();
-	    }
-	    copy( ilast-1, ilast );
-	} else if( equal( ilast-1, ilast-2) ) {
-	    output( ilast );
-	    swapMesh();
-	    for( register int i = ilast-3; i >= 0; i-- ) {
-		swapMesh();
-		output( i );
-	    }
-	    copy( ilast, 0 );
-	} else {
-	    closeMesh();	openMesh();
-	    output( 0 );
-	    output( ilast );
-	    for( register int i = 1; i < ilast; i++ ) {
-		output( i );
-		swapMesh();
-	    }
-	    copy( ilast-1, ilast );
-	}
-
-	lastedge = 0;
-        //for( register long k=0; k<ilast-1; k++ ) pop( k );
-	move( 0, ilast-1 );
-	move( 1, ilast );
-	itop = 1;
-    } else {
-	if( ! isCw( ilast ) ) return;
-	do {
-	    itop--;
-	} while( (itop > 1) && isCw( ilast ) );
-
-	if( equal( ilast-2, ilast-1) ) {
-	    swapMesh();
-	    output( ilast );
-	    for( register int i=ilast-3; i>=itop-1; i--) {
-		output( i );
-		swapMesh( );
-	    }
-	    copy( itop-1, ilast );
-	} else if( equal( itop-1, itop) ) {
-	    output( ilast );
-	    swapMesh();
-	    for( register int i=itop+1; i<ilast; i++ ) {
-		swapMesh( );
-		output( i );
-	    }
-	    copy( ilast, ilast-1 );
-	} else {
-	    closeMesh();	openMesh();
-	    output( ilast-1 );
-	    output( ilast );
-	    for( register int i=ilast-2; i>=itop-1; i-- ) {
-		output( i );
-		swapMesh( );
-	    }
-	    copy( itop-1, ilast );
-	}
-        //for( register int k=itop; k<ilast; k++ ) pop( k );
-	move( itop, ilast );
-    }
-}
-
-
diff --git a/src/glu/sgi/libnurbs/internals/mesher.h b/src/glu/sgi/libnurbs/internals/mesher.h
deleted file mode 100644
index bb65d0f1c7d..00000000000
--- a/src/glu/sgi/libnurbs/internals/mesher.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mesher.h
- *
- */
-
-#ifndef __glumesher_h_
-#define __glumesher_h_
-
-#include "hull.h"
-
-class TrimRegion;
-class Backend;
-class Pool;
-// struct GridTrimVertex;
-
-
-class Mesher : virtual public TrimRegion, public Hull {
-public:
-     			Mesher( Backend & );
-			~Mesher( void );
-    void		init( unsigned int );
-    void		mesh( void );
-
-private:
-    static const float	ZERO;
-    Backend&		backend;
-
-    Pool		p;
-    unsigned int	stacksize;
-    GridTrimVertex **	vdata;
-    GridTrimVertex *	last[2];
-    int			itop;
-    int			lastedge;
-
-    inline void		openMesh( void );
-    inline void		swapMesh( void );
-    inline void		closeMesh( void );
-    inline int		isCcw( int );
-    inline int		isCw( int );
-    inline void		clearStack( void );
-    inline void		push( GridTrimVertex * );
-    inline void		pop( long );
-    inline void		move( int, int );
-    inline int 		equal( int, int );
-    inline void 	copy( int, int );
-    inline void 	output( int );
-    void		addUpper( void );
-    void		addLower( void );
-    void		addLast( void );
-    void		finishUpper( GridTrimVertex * );
-    void		finishLower( GridTrimVertex * );
-};
-#endif /* __glumesher_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/monoTriangulationBackend.cc b/src/glu/sgi/libnurbs/internals/monoTriangulationBackend.cc
deleted file mode 100644
index 2830cc743ca..00000000000
--- a/src/glu/sgi/libnurbs/internals/monoTriangulationBackend.cc
+++ /dev/null
@@ -1,397 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "monoTriangulation.h"
-#include "polyUtil.h"
-#include "backend.h"
-#include "arc.h"
-
-void reflexChain::outputFan(Real v[2], Backend* backend)
-{
-  Int i;
-  /*
-  TrimVertex trimVert;
-  */
-  backend->bgntfan();
-
-  /*
-  trimVert.param[0]=v[0];
-  trimVert.param[1]=v[1];
-  backend->tmeshvert(&trimVert);
-  */
-  backend->tmeshvert(v[0], v[1]);
-
-  if(isIncreasing) {
-    for(i=0; i<index_queue; i++)
-      {
-	/*
-	trimVert.param[0]=queue[i][0];
-	trimVert.param[1]=queue[i][1];
-	backend->tmeshvert(&trimVert);
-	*/
-	backend->tmeshvert(queue[i][0], queue[i][1]);
-      }
-  }
-  else {
-    for(i=index_queue-1; i>=0; i--)
-      {
-	/*
-	trimVert.param[0]=queue[i][0];
-	trimVert.param[1]=queue[i][1];
-	backend->tmeshvert(&trimVert);
-	*/
-	backend->tmeshvert(queue[i][0], queue[i][1]);
-      }
-  }
-  backend->endtfan();
-}
-
-void reflexChain::processNewVertex(Real v[2], Backend* backend)
-{
-  Int i,j,k;
-  Int isReflex;
-  /*TrimVertex trimVert;*/
-  /*if there are at most one vertex in the queue, then simply insert
-   */
-  if(index_queue <=1){
-    insert(v);
-    return;
-  }
-  
-  /*there are at least two vertices in the queue*/
-  j=index_queue-1;
-  
-  for(i=j; i>=1; i--) {
-    if(isIncreasing) {
-      isReflex = (area(queue[i-1], queue[i], v) <= 0.0);
-    }
-    else /*decreasing*/{
-      isReflex = (area(v, queue[i], queue[i-1]) <= 0.0);	  
-    }
-    if(isReflex) {
-      break;
-    }
-  }
-
-  /*
-   *if i<j then vertices: i+1--j are convex
-   * output triangle fan: 
-   *  v, and queue[i], i+1, ..., j
-   */
-  if(i<j) 
-    {
-      backend->bgntfan();
-      /*
-      trimVert.param[0]=v[0];
-      trimVert.param[1]=v[1];
-      backend->tmeshvert(& trimVert);
-      */
-      backend->tmeshvert(v[0], v[1]);
-
-      if(isIncreasing) {
-	for(k=i; k<=j; k++)
-	  {
-	    /*
-	    trimVert.param[0]=queue[k][0];
-	    trimVert.param[1]=queue[k][1];
-	    backend->tmeshvert(& trimVert);
-	    */
-	    backend->tmeshvert(queue[k][0], queue[k][1]);
-	  }
-      }
-      else {
-	for(k=j; k>=i; k--)
-	  {
-	    /*
-	    trimVert.param[0]=queue[k][0];
-	    trimVert.param[1]=queue[k][1];
-	    backend->tmeshvert(& trimVert);
-	    */
-	    backend->tmeshvert(queue[k][0], queue[k][1]);
-	  }
-      }
-      
-      backend->endtfan();
-    }
-
-  /*delete vertices i+1--j from the queue*/
-  index_queue = i+1;
-  /*finally insert v at the end of the queue*/
-  insert(v);
-
-}
-
-
-void monoTriangulationRec(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			  Backend* backend)
-{
-  assert( inc_chain != NULL && dec_chain != NULL);
-  assert( ! (inc_current>=inc_chain->getNumElements() &&
-	     dec_current>=dec_chain->getNumElements()));
-  Int inc_nVertices;
-  Int dec_nVertices;
-  Real** inc_array ;
-  Real** dec_array ;
-  Int i;
-  assert( ! ( (inc_chain==NULL) && (dec_chain==NULL)));
-
-  if(inc_current>=inc_chain->getNumElements()) /*no more vertices on inc_chain*/
-    {
-
-      dec_array = dec_chain->getArray();
-      dec_nVertices = dec_chain->getNumElements();      
-      reflexChain rChain(20,0);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, backend);
-      /*process all the vertices on the dec_chain*/
-      for(i=dec_current; i<dec_nVertices; i++){
-	rChain.processNewVertex(dec_array[i], backend);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, backend);
-
-    }
-  else if(dec_current>= dec_chain->getNumElements()) /*no more vertices on dec_chain*/
-    {
-      inc_array = inc_chain->getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      reflexChain rChain(20,1);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, backend);
-      /*process all the vertices on the inc_chain*/
-      for(i=inc_current; i<inc_nVertices; i++){
-	rChain.processNewVertex(inc_array[i], backend);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, backend);
-    }
-  else /*neither chain is empty*/
-    {
-      inc_array = inc_chain -> getArray();
-      dec_array = dec_chain -> getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      dec_nVertices= dec_chain->getNumElements();
-      /*if top of inc_chain is 'lower' than top of dec_chain, process all the 
-       *vertices on the dec_chain which are higher than top of inc_chain
-       */
-      if(compV2InY(inc_array[inc_current], dec_array[dec_current]) <= 0)
-	{
-
-	  reflexChain rChain(20, 0);
-	  rChain.processNewVertex(topVertex, backend);
-	  for(i=dec_current; i<dec_nVertices; i++)
-	    {
-	      if(compV2InY(inc_array[inc_current], dec_array[i]) <= 0)
-		rChain.processNewVertex(dec_array[i], backend);
-	      else 
-		break;
-	    }
-	  rChain.outputFan(inc_array[inc_current], backend);
-	  monoTriangulationRec(dec_array[i-1], botVertex, 
-			       inc_chain, inc_current,
-			       dec_chain, i,
-			       backend);
-	}
-      else /*compV2InY(inc_array[inc_current], dec_array[dec_current]) > 0*/
-	{
-
-	  reflexChain rChain(20, 1);
-	  rChain.processNewVertex(topVertex, backend);
-	  for(i=inc_current; i<inc_nVertices; i++)
-	    {
-	      if(compV2InY(inc_array[i], dec_array[dec_current]) >0)		
-		rChain.processNewVertex(inc_array[i], backend);	      
-	      else
-		break;
-	    }
-	  rChain.outputFan(dec_array[dec_current], backend);
-	  monoTriangulationRec(inc_array[i-1], botVertex, 
-			       inc_chain, i,
-			       dec_chain, dec_current,
-			       backend);
-	}
-    }/*end case neither is empty*/
-}
-
-
-void monoTriangulationFunBackend(Arc_ptr loop, Int (*compFun)(Real*, Real*), Backend* backend)
-{
-  Int i;
-  /*find the top vertex, bottom vertex, inccreasing chain, and decreasing chain,
-   *then call monoTriangulationRec
-   */
-  Arc_ptr tempV;
-  Arc_ptr topV;
-  Arc_ptr botV;
-  topV = botV = loop;
-  for(tempV = loop->next; tempV != loop; tempV = tempV->next)
-    {
-      if(compFun(topV->tail(), tempV->tail())<0) {
-	topV = tempV;
-      }
-      if(compFun(botV->tail(), tempV->tail())>0) {
-	botV = tempV;
-      }
-    }
-
-  /*creat increase and decrease chains*/
-  vertexArray inc_chain(20); /*this is a dynamic array*/
-  for(i=1; i<=topV->pwlArc->npts-2; i++) { /*the first vertex is the top vertex which doesn't belong to inc_chain*/
-    inc_chain.appendVertex(topV->pwlArc->pts[i].param);
-  }
-  for(tempV = topV->next; tempV != botV; tempV = tempV->next)
-    {
-      for(i=0; i<=tempV->pwlArc->npts-2; i++){
-	inc_chain.appendVertex(tempV->pwlArc->pts[i].param);
-      }
-    }
-  
-  vertexArray dec_chain(20);
-  for(tempV = topV->prev; tempV != botV; tempV = tempV->prev)
-    {
-      for(i=tempV->pwlArc->npts-2; i>=0; i--){
-	dec_chain.appendVertex(tempV->pwlArc->pts[i].param);
-      }
-    }
-  for(i=botV->pwlArc->npts-2; i>=1; i--){ 
-    dec_chain.appendVertex(tempV->pwlArc->pts[i].param);
-  }
-  
-  monoTriangulationRecFunBackend(topV->tail(), botV->tail(), &inc_chain, 0, &dec_chain, 0, compFun, backend);
-
-}  
-
-/*if compFun == compV2InY, top to bottom: V-monotone
- *if compFun == compV2InX, right to left: U-monotone
- */
-void monoTriangulationRecFunBackend(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			  Int  (*compFun)(Real*, Real*),
-			  Backend* backend)
-{
-  assert( inc_chain != NULL && dec_chain != NULL);
-  assert( ! (inc_current>=inc_chain->getNumElements() &&
-	     dec_current>=dec_chain->getNumElements()));
-  Int inc_nVertices;
-  Int dec_nVertices;
-  Real** inc_array ;
-  Real** dec_array ;
-  Int i;
-  assert( ! ( (inc_chain==NULL) && (dec_chain==NULL)));
-
-  if(inc_current>=inc_chain->getNumElements()) /*no more vertices on inc_chain*/
-    {
-
-      dec_array = dec_chain->getArray();
-      dec_nVertices = dec_chain->getNumElements();      
-      reflexChain rChain(20,0);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, backend);
-      /*process all the vertices on the dec_chain*/
-      for(i=dec_current; i<dec_nVertices; i++){
-	rChain.processNewVertex(dec_array[i], backend);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, backend);
-
-    }
-  else if(dec_current>= dec_chain->getNumElements()) /*no more vertices on dec_chain*/
-    {
-      inc_array = inc_chain->getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      reflexChain rChain(20,1);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, backend);
-      /*process all the vertices on the inc_chain*/
-      for(i=inc_current; i<inc_nVertices; i++){
-	rChain.processNewVertex(inc_array[i], backend);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, backend);
-    }
-  else /*neither chain is empty*/
-    {
-      inc_array = inc_chain -> getArray();
-      dec_array = dec_chain -> getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      dec_nVertices= dec_chain->getNumElements();
-      /*if top of inc_chain is 'lower' than top of dec_chain, process all the 
-       *vertices on the dec_chain which are higher than top of inc_chain
-       */
-      if(compFun(inc_array[inc_current], dec_array[dec_current]) <= 0)
-	{
-
-	  reflexChain rChain(20, 0);
-	  rChain.processNewVertex(topVertex, backend);
-	  for(i=dec_current; i<dec_nVertices; i++)
-	    {
-	      if(compFun(inc_array[inc_current], dec_array[i]) <= 0)
-		rChain.processNewVertex(dec_array[i], backend);
-	      else 
-		break;
-	    }
-	  rChain.outputFan(inc_array[inc_current], backend);
-	  monoTriangulationRecFunBackend(dec_array[i-1], botVertex, 
-			       inc_chain, inc_current,
-			       dec_chain, i,
-			       compFun,
-			       backend);
-	}
-      else /*compFun(inc_array[inc_current], dec_array[dec_current]) > 0*/
-	{
-
-	  reflexChain rChain(20, 1);
-	  rChain.processNewVertex(topVertex, backend);
-	  for(i=inc_current; i<inc_nVertices; i++)
-	    {
-	      if(compFun(inc_array[i], dec_array[dec_current]) >0)		
-		rChain.processNewVertex(inc_array[i], backend);	      
-	      else
-		break;
-	    }
-	  rChain.outputFan(dec_array[dec_current], backend);
-	  monoTriangulationRecFunBackend(inc_array[i-1], botVertex, 
-			       inc_chain, i,
-			       dec_chain, dec_current,
-			       compFun,
-			       backend);
-	}
-    }/*end case neither is empty*/
-}
diff --git a/src/glu/sgi/libnurbs/internals/monotonizer.cc b/src/glu/sgi/libnurbs/internals/monotonizer.cc
deleted file mode 100644
index 5845d310bad..00000000000
--- a/src/glu/sgi/libnurbs/internals/monotonizer.cc
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * monotonizer.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "arc.h"
-#include "arctess.h"
-#include "bezierarc.h"
-#include "bin.h"
-#include "mapdesc.h"
-#include "nurbsconsts.h"
-#include "subdivider.h"
-
-/*-----------------------------------------------------------------------------
- * Subdivider::decompose - break all curves into monotone arcs
- *-----------------------------------------------------------------------------
- */
-int
-Subdivider::decompose( Bin& bin, REAL geo_stepsize )
-{
-    Arc_ptr jarc;
-    for( jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	if( ! jarc->isTessellated() ) {
-	    /* points have not been transformed, therefore they may be either
-	       homogeneous or inhomogeneous */
-	    tessellate( jarc, geo_stepsize );
-	    if( jarc->isDisconnected() || jarc->next->isDisconnected() ) 
-		return 1;
-	}
-    }
-
-    for( jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	monotonize( jarc, bin );
-    }
-
-#ifndef NDEBUG
-    for( jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	assert( isMonotone( jarc ) != 0 );
-    }
-#endif
-
-    return 0;
-}
-
-void
-Subdivider::tessellate( Arc_ptr jarc, REAL geo_stepsize )
-{
-    BezierArc *b = jarc->bezierArc;
-    Mapdesc *mapdesc = b->mapdesc;
-
-    if( mapdesc->isRational() ) {
-	REAL max = mapdesc->calcVelocityRational( b->cpts, b->stride, b->order );
-	REAL arc_stepsize = (max > 1.0) ? (1.0/max) : 1.0; 
-	if( jarc->bezierArc->order != 2 )
-	    arctessellator.tessellateNonlinear( jarc, geo_stepsize, arc_stepsize, 1 );
-	else {
-	    arctessellator.tessellateLinear( jarc, geo_stepsize, arc_stepsize, 1 );
-	}
-    } else { 
-	REAL max = mapdesc->calcVelocityNonrational( b->cpts, b->stride, b->order );
-	REAL arc_stepsize = (max > 1.0) ? (1.0/max) : 1.0; 
-	if( jarc->bezierArc->order != 2 )
-	    arctessellator.tessellateNonlinear( jarc, geo_stepsize, arc_stepsize, 0 );
-	else {
-	    arctessellator.tessellateLinear( jarc, geo_stepsize, arc_stepsize, 0 );
-	}
-    }
-}
-
-/*-------------------------------------------------------------------------
- * Subdivider::monotonize - break up a jordan arc into s,t-monotone
- *	components.  This code will remove degenerate segments, including
- *	arcs of only a single point.
- *-------------------------------------------------------------------------
- */
-void
-Subdivider::monotonize( Arc_ptr jarc, Bin& bin )
-{
-    TrimVertex  *firstvert = jarc->pwlArc->pts;
-    TrimVertex  *lastvert = firstvert + (jarc->pwlArc->npts - 1);
-    long	uid = jarc->nuid;
-    arc_side	side = jarc->getside();
-    dir		sdir = none;
-    dir		tdir = none;
-    int 	degenerate = 1;
-
-    int		nudegenerate;
-    int		change;
-
-    TrimVertex *vert;
-    for( vert = firstvert; vert != lastvert; vert++ ) {
-
-        nudegenerate = 1;
-        change = 0;
-
-	/* check change relative to s axis, clear degenerate bit if needed */
-        REAL sdiff = vert[1].param[0] - vert[0].param[0]; 
-        if( sdiff == 0 ) {
-	    if( sdir != same ) {
-	        sdir = same;
-		change = 1;
-	    }
-        } else if( sdiff < 0.0 ) {
-	    if( sdir != down ) {
-	        sdir = down;
-		change = 1;
-	    }
-	    nudegenerate = 0;
-        } else {
-	    if( sdir != up ) {
-	        sdir = up;
-		change = 1;
-	    }
-	    nudegenerate = 0;
-        }
-    
-	/* check change relative to t axis, clear degenerate bit if needed */
-        REAL tdiff = vert[1].param[1] - vert[0].param[1]; 
-        if( tdiff == 0 ) { 
-	    if( tdir != same ) {
-	        tdir = same;
-	 	change = 1;
-	    }
-        } else if( tdiff < 0.0 ) {
-	    if( tdir != down ) {
-	        tdir = down;
-		change = 1;
-	    }
-	    nudegenerate = 0;
-        } else {
-	    if( tdir != up ) {
-	        tdir = up;
-		change = 1;
-	    }
-	    nudegenerate = 0;
-        }
-    
-	if( change ) {
-	    if( ! degenerate ) {
-	        /* make last segment into separate pwl curve */
-	        jarc->pwlArc->npts = vert - firstvert + 1;
-	        jarc = (new(arcpool) Arc( side, uid ))->append( jarc );
-	        jarc->pwlArc = new(pwlarcpool) PwlArc();
-		bin.addarc( jarc );
-	    }
-	    firstvert = jarc->pwlArc->pts = vert;
-	    degenerate = nudegenerate;
-	} 
-    }
-    jarc->pwlArc->npts = vert - firstvert + 1;
-
-    if( degenerate ) {
-	/* remove jarc from circularly linked list */
-	jarc->prev->next = jarc->next;
-	jarc->next->prev = jarc->prev;
-
-        assert( jarc->prev->check(  ) != 0 );
-        assert( jarc->next->check(  ) != 0 );
-
-	/* remove jarc from bin */
-	bin.remove_this_arc( jarc  );
-
-	jarc->pwlArc->deleteMe( pwlarcpool ); jarc->pwlArc = 0;
-	jarc->deleteMe( arcpool );
-    } 
-}
-
-/*-------------------------------------------------------------------------
- * Subdivider::isMonotone - return true if arc is monotone AND non-degenerate
- *-------------------------------------------------------------------------
- */
-int
-Subdivider::isMonotone( Arc_ptr jarc )
-{
-    TrimVertex  *firstvert = jarc->pwlArc->pts;
-    TrimVertex  *lastvert = firstvert + (jarc->pwlArc->npts - 1);
-
-    if( firstvert == lastvert ) return 1;
-
-    TrimVertex	*vert = firstvert;
-    enum dir	sdir;
-    enum dir	tdir;
-
-    REAL diff = vert[1].param[0] - vert[0].param[0]; 
-    if( diff == 0.0 ) 
-        sdir = same;
-    else if( diff < 0.0 )
-        sdir = down;
-    else
-        sdir = up;
-
-    diff = vert[1].param[1] - vert[0].param[1]; 
-    if( diff == 0.0 ) 
-        tdir = same;
-    else if( diff < 0.0 )
-        tdir = down;
-    else
-        tdir = up;
-
-    if( (sdir == same) && (tdir == same) ) return 0;
-    
-    for( ++vert ; vert != lastvert; vert++ ) {
-        diff = vert[1].param[0] - vert[0].param[0]; 
-        if( diff == 0.0 ) {
-	    if( sdir != same ) return 0;
-        } else if( diff < 0.0 ) {
-	    if( sdir != down ) return 0;
-        } else {
-	    if( sdir != up ) return 0;
-        }
-
-        diff = vert[1].param[1] - vert[0].param[1]; 
-        if( diff == 0.0 ) {
-	    if( tdir != same ) return 0;
-        } else if( diff < 0.0 ) {
-	    if( tdir != down ) return 0;
-        } else {
-	    if( tdir != up ) return 0;
-        }
-    }
-    return 1;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/monotonizer.h b/src/glu/sgi/libnurbs/internals/monotonizer.h
deleted file mode 100644
index e951084ff03..00000000000
--- a/src/glu/sgi/libnurbs/internals/monotonizer.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * monotonizer.h
- *
- */
-
-#ifndef __glumonotonizer_h_
-#define __glumonotonizer_h_
-
-#include "mysetjmp.h"
-#include "types.h"
-
-class Arc;
-class ArcTessellator;
-class Pool;
-class Bin;
-class PwlArcPool;
-class Mapdesc;
-
-class Monotonizer {
-    ArcTessellator&	arctessellator;
-    Pool&		arcpool;
-    Pool&		pwlarcpool;
-    jmp_buf&		nurbsJmpBuf;
-
-    enum dir 		{ down, same, up, none };
-    void		tessellate( Arc *, REAL );
-    void		monotonize( Arc *, Bin & );
-    int			isMonotone( Arc * );
-public:
-    			Monotonizer( ArcTessellator& at, Pool& ap, Pool& p, jmp_buf& j ) 
-				: arctessellator(at), arcpool(ap), pwlarcpool(p), nurbsJmpBuf(j) {}
-    int			decompose( Bin &, REAL );
-};
-#endif /* __glumonotonizer_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/myassert.h b/src/glu/sgi/libnurbs/internals/myassert.h
deleted file mode 100644
index cbd6006f55c..00000000000
--- a/src/glu/sgi/libnurbs/internals/myassert.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * myassert.h
- *
- */
-
-#ifndef __glumyassert_h_
-#define __glumyassert_h_
-
-#ifdef STANDALONE
-#define assert(EX) ((void)0)
-#endif
-
-#ifdef LIBRARYBUILD
-#include <assert.h>
-#endif
-
-#ifdef GLBUILD
-#define assert(EX) ((void)0)
-#endif
-
-#endif /* __glumyassert_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/mycode.cc b/src/glu/sgi/libnurbs/internals/mycode.cc
deleted file mode 100644
index 3625cacd74f..00000000000
--- a/src/glu/sgi/libnurbs/internals/mycode.cc
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "mymath.h"
-
-#ifdef NEEDCEILF
-
-float ceilf( float x )
-{
-   if( x < 0 ) {
-	float nx = -x;
-	int ix = (int) nx;
-	return (float) -ix;
-   } else {
-	int ix = (int) x;
-	if( x == (float) ix ) return x;
-	return (float) (ix+1);
-   }
-}
-
-float floorf( float x )
-{
-   if( x < 0 ) {
-	float nx = -x;
-	int ix = (int) nx;
-	if( nx == (float) ix ) return x;
-	return (float) -(ix+1);
-   } else {
-	int ix = (int) x;
-	return (float) ix;
-   }
-}
-#endif
diff --git a/src/glu/sgi/libnurbs/internals/mymath.h b/src/glu/sgi/libnurbs/internals/mymath.h
deleted file mode 100644
index 17ef7237fe2..00000000000
--- a/src/glu/sgi/libnurbs/internals/mymath.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mymath.h
- *
- */
-
-#ifndef __glumymath_h_
-#define __glumymath_h_
-
-#ifdef GLBUILD
-#define sqrtf		gl_fsqrt
-#endif
-
-#if defined(GLBUILD) || defined(STANDALONE)
-#define M_SQRT2		1.41421356237309504880
-#define ceilf		myceilf
-#define floorf		myfloorf	
-#define sqrtf		sqrt
-extern "C" double	sqrt(double);
-extern "C" float	ceilf(float);
-extern "C" float	floorf(float);
-#define NEEDCEILF
-#endif
-
-#ifdef LIBRARYBUILD
-#include <math.h>
-#endif
-
-#if !defined sqrtf
-#    define sqrtf(x)    ((float)sqrt(x))
-#endif
-#if !defined ceilf
-#    define ceilf(x)    ((float)ceil(x))
-#endif
-#if !defined floorf
-#    define floorf(x)   ((float)floor(x))
-#endif
-
-#endif /* __glumymath_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/mysetjmp.h b/src/glu/sgi/libnurbs/internals/mysetjmp.h
deleted file mode 100644
index 2a3f6a87b3a..00000000000
--- a/src/glu/sgi/libnurbs/internals/mysetjmp.h
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mysetjmp.h
- *
- */
-
-#ifndef __glumysetjmp_h_
-#define __glumysetjmp_h_
-
-#ifdef STANDALONE
-struct JumpBuffer;
-extern "C" JumpBuffer *newJumpbuffer( void );
-extern "C" void deleteJumpbuffer(JumpBuffer *);
-extern "C" void mylongjmp( JumpBuffer *, int );
-extern "C" int mysetjmp( JumpBuffer * );
-#endif
-
-#ifdef GLBUILD
-#define setjmp		gl_setjmp
-#define longjmp 	gl_longjmp
-#endif
-
-#if defined(LIBRARYBUILD) || defined(GLBUILD)
-#include <setjmp.h>
-#include <stdlib.h>
-
-struct JumpBuffer {
-    jmp_buf	buf;
-};
-
-inline JumpBuffer *
-newJumpbuffer( void )
-{
-    return (JumpBuffer *) malloc( sizeof( JumpBuffer ) );
-}
-
-inline void
-deleteJumpbuffer(JumpBuffer *jb)
-{
-   free( (void *) jb);
-}
-
-inline void
-mylongjmp( JumpBuffer *j, int code ) 
-{
-    ::longjmp( j->buf, code );
-}
-
-inline int
-mysetjmp( JumpBuffer *j )
-{
-    return setjmp( j->buf );
-}
-#endif
-
-#endif /* __glumysetjmp_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/mystring.h b/src/glu/sgi/libnurbs/internals/mystring.h
deleted file mode 100644
index d2952da894e..00000000000
--- a/src/glu/sgi/libnurbs/internals/mystring.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mystring.h
- *
- */
-
-#ifndef __glumystring_h_
-#define __glumystring_h_
-
-#ifdef STANDALONE
-typedef unsigned int size_t;
-extern "C" void *	memcpy(void *, const void *, size_t);
-extern "C" void *	memset(void *, int, size_t);
-#endif
-
-#ifdef GLBUILD
-#define memcpy(a,b,c)	bcopy(b,a,c)
-#define memset(a,b,c)	bzero(a,c)
-extern "C" void		bcopy(const void *, void *, int);
-extern "C" void		bzero(void *, int);
-#endif
-
-#ifdef LIBRARYBUILD
-#include <string.h>
-#endif
-
-#endif /* __glumystring_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/nurbsconsts.h b/src/glu/sgi/libnurbs/internals/nurbsconsts.h
deleted file mode 100644
index acc5d7f31f6..00000000000
--- a/src/glu/sgi/libnurbs/internals/nurbsconsts.h
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * nurbsconsts.h
- *
- */
-
-#ifndef __glunurbsconsts_h_
-#define __glunurbsconsts_h_
-
-/* NURBS Properties - one set per map, 
-   each takes a single INREAL arg */
-#define N_SAMPLING_TOLERANCE  	1
-#define N_S_RATE		6
-#define N_T_RATE		7
-#define N_CLAMPFACTOR		13
-#define 	N_NOCLAMPING		0.0
-#define N_MINSAVINGS		14
-#define 	N_NOSAVINGSSUBDIVISION	0.0
-
-/* NURBS Properties - one set per map, 
-   each takes an enumerated value */
-#define N_CULLING		2
-#define 	N_NOCULLING		0.0
-#define 	N_CULLINGON		1.0
-#define N_SAMPLINGMETHOD	10
-#define 	N_NOSAMPLING		0.0
-#define 	N_FIXEDRATE		3.0
-#define 	N_DOMAINDISTANCE	2.0
-#define 	N_PARAMETRICDISTANCE	5.0
-#define 	N_PATHLENGTH		6.0
-#define 	N_SURFACEAREA		7.0
-#define         N_OBJECTSPACE_PARA           8.0
-#define         N_OBJECTSPACE_PATH           9.0
-#define N_BBOX_SUBDIVIDING	17
-#define 	N_NOBBOXSUBDIVISION	0.0
-#define 	N_BBOXTIGHT		1.0
-#define 	N_BBOXROUND		2.0
-
-/* NURBS Rendering Properties - one set per renderer
-   each takes an enumerated value */
-#define N_DISPLAY		3
-#define 	N_FILL			1.0 	
-#define 	N_OUTLINE_POLY		2.0
-#define 	N_OUTLINE_TRI		3.0
-#define 	N_OUTLINE_QUAD	 	4.0
-#define 	N_OUTLINE_PATCH		5.0
-#define 	N_OUTLINE_PARAM		6.0
-#define 	N_OUTLINE_PARAM_S	7.0
-#define 	N_OUTLINE_PARAM_ST 	8.0
-#define 	N_OUTLINE_SUBDIV 	9.0
-#define 	N_OUTLINE_SUBDIV_S 	10.0
-#define 	N_OUTLINE_SUBDIV_ST 	11.0
-#define 	N_ISOLINE_S		12.0
-#define N_ERRORCHECKING		4
-#define 	N_NOMSG			0.0
-#define 	N_MSG			1.0
-
-/* GL 4.0 propeties not defined above */
-#ifndef N_PIXEL_TOLERANCE
-#define N_PIXEL_TOLERANCE	N_SAMPLING_TOLERANCE
-#define N_ERROR_TOLERANCE	20
-#define N_SUBDIVISIONS		5
-#define N_TILES			8
-#define N_TMP1			9
-#define N_TMP2			N_SAMPLINGMETHOD
-#define N_TMP3			11
-#define N_TMP4			12
-#define N_TMP5			N_CLAMPFACTOR
-#define N_TMP6			N_MINSAVINGS
-#define N_S_STEPS		N_S_RATE
-#define N_T_STEPS		N_T_RATE
-#endif
-
-/* NURBS Rendering Properties - one set per map,
-   each takes an INREAL matrix argument */
-#define N_CULLINGMATRIX		1
-#define N_SAMPLINGMATRIX	2
-#define N_BBOXMATRIX		3
-
-
-/* NURBS Rendering Properties - one set per map,
-   each takes an INREAL vector argument */
-#define	N_BBOXSIZE		4
-
-/* type argument for trimming curves */
-#ifndef N_P2D
-#define N_P2D 	 		0x8	
-#define N_P2DR 	 		0xd
-#endif	
-
-#endif /* __glunurbsconsts_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/nurbsinterfac.cc b/src/glu/sgi/libnurbs/internals/nurbsinterfac.cc
deleted file mode 100644
index 520bd419ea2..00000000000
--- a/src/glu/sgi/libnurbs/internals/nurbsinterfac.cc
+++ /dev/null
@@ -1,537 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * nurbsinterfac.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "nurbsconsts.h"
-#include "nurbstess.h"
-#include "bufpool.h"
-#include "quilt.h"
-#include "displaylist.h"
-#include "knotvector.h"
-#include "mapdesc.h"
-
-#define THREAD( work, arg, cleanup ) \
-	if( dl ) {\
-	    arg->save = 1;\
-	    dl->append( (PFVS)&NurbsTessellator::work, (void *) arg, (PFVS)&NurbsTessellator::cleanup );\
- 	} else {\
-	    arg->save = 0;\
-	    work( arg );\
-	}
-
-#define THREAD2( work ) \
-	if( dl ) {\
-	    dl->append( (PFVS)&NurbsTessellator::work, 0, 0 );\
- 	} else {\
-	    work( );\
-	}
-
-NurbsTessellator::NurbsTessellator( BasicCurveEvaluator &c, BasicSurfaceEvaluator& e) 
-	: maplist( backend ),
-	  backend( c, e ),
-          subdivider( renderhints, backend ),
-	  o_pwlcurvePool( sizeof( O_pwlcurve ), 32, "o_pwlcurvePool" ),
-	  o_nurbscurvePool( sizeof( O_nurbscurve ), 32, "o_nurbscurvePool"),
-	  o_curvePool( sizeof( O_curve ), 32,  "o_curvePool" ),
-	  o_trimPool( sizeof( O_trim ), 32,  "o_trimPool" ),
-	  o_surfacePool( sizeof( O_surface ), 1, "o_surfacePool" ),
-	  o_nurbssurfacePool( sizeof( O_nurbssurface ), 4, "o_nurbssurfacePool" ),
-	  propertyPool( sizeof( Property ), 32, "propertyPool" ),
-          quiltPool( sizeof( Quilt  ), 32, "quiltPool" )
-{
-    dl		= 0;
-    inSurface	= 0;
-    inCurve	= 0;
-    inTrim	= 0;
-    playBack	= 0;
-    jumpbuffer  = newJumpbuffer();
-    subdivider.setJumpbuffer( jumpbuffer );
-}
-
-NurbsTessellator::~NurbsTessellator( void ) 
-{
-    if( inTrim ) {
-	do_nurbserror( 12 );
-	endtrim();
-    }
-
-    if( inSurface ) {
-        *nextNurbssurface = 0;
-        do_freeall();
-    }
-
-    if (jumpbuffer) {
-        deleteJumpbuffer(jumpbuffer);
-	jumpbuffer= 0;
-    }	
-}
-
-/*-----------------------------------------------------------------------------
- * bgnsurface - allocate and initialize an o_surface structure
- *
- * Client: GL user
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::bgnsurface( long nuid )
-{
-    O_surface *o_surface = new(o_surfacePool) O_surface;
-    o_surface->nuid = nuid;
-    THREAD( do_bgnsurface, o_surface, do_freebgnsurface );
-}
-
-/*-----------------------------------------------------------------------------
- * bgncurve - allocate an initialize an o_curve structure
- * 
- * Client: GL user
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::bgncurve( long nuid )
-{
-    O_curve *o_curve = new(o_curvePool) O_curve;
-    o_curve->nuid = nuid;
-    THREAD( do_bgncurve, o_curve, do_freebgncurve );
-}
-/*-----------------------------------------------------------------------------
- * endcurve -
- * 
- * Client:
- *-----------------------------------------------------------------------------
- */
-
-void
-NurbsTessellator::endcurve( void )
-{
-    THREAD2( do_endcurve );
-}
-
-/*-----------------------------------------------------------------------------
- * endsurface - user level end of surface call
- *
- * Client: GL user
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::endsurface( void )
-{
-    THREAD2( do_endsurface );
-}
-
-
-/*-----------------------------------------------------------------------------
- * bgntrim - allocate and initialize a new trim loop structure (o_trim )
- *
- * Client: GL user
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::bgntrim( void )
-{
-    O_trim *o_trim = new(o_trimPool) O_trim;
-    THREAD( do_bgntrim, o_trim, do_freebgntrim );
-}
-
-/*-----------------------------------------------------------------------------
- * endtrim -
- *
- * Client: GL user
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::endtrim( void )
-{
-    THREAD2( do_endtrim );
-}
-
-
-/*-----------------------------------------------------------------------------
- * pwlcurve -
- *
- *      count        - number of points on curve
- *      array        - array of points on curve
- *      byte_stride  - distance between points in bytes
- *      type         - valid data flag
- *
- * Client: Gl user
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::pwlcurve( long count, INREAL array[], long byte_stride, long type )
-{
-    Mapdesc *mapdesc = maplist.locate( type );
-
-    if( mapdesc == 0 ) {
-	do_nurbserror( 35 );
-	isDataValid = 0;
-	return;
-    }
-
-    if ( (type != N_P2D) && (type != N_P2DR) ) {
-	do_nurbserror( 22 );
-	isDataValid = 0;
-	return;
-    }
-    if( count < 0 ) {
-	do_nurbserror( 33 );
-	isDataValid = 0;
-	return;
-    }
-    if( byte_stride < 0 ) {
-	do_nurbserror( 34 );
-	isDataValid = 0;
-	return;
-    }
-
-#ifdef NOTDEF
-    if( mapdesc->isRational() ) {
-	INREAL *p = array;
-	INREAL x = p[0]; INREAL y = p[1]; INREAL w = p[2];
-	p = (INREAL *) (((char *) p) + byte_stride);
-	for( long i = 1; i != count; i++ ) {
-	    if( p[0] == x && p[1] == y && p[2] == w ) break;
-	    x = p[0]; y = p[1]; w = p[2];
-	    p = (INREAL *) (((char *) p) + byte_stride);
-	}
-	if( i != count ) {
-	    do_nurbserror( 37 );
-	    _glu_dprintf( "point %d (%f,%f)\n", i, x, y );
-	    isDataValid = 0;
-	    return;
-	}
-    } else {
-	INREAL *p = array;
-	INREAL x = p[0]; INREAL y = p[1];
-	p = (INREAL *) (((char *) p) + byte_stride);
-	for( long i = 1; i != count; i++ ) {
-	    if( p[0] == x && p[1] == y ) break;
-	    x = p[0]; y = p[1];
-	    p = (INREAL *) (((char *) p) + byte_stride);
-	}
-	if( i != count ) {
-	    do_nurbserror( 37 );
-	    _glu_dprintf( "point %d (%f,%f)\n", i, x, y );
-	    isDataValid = 0;
-	    return;
-	}
-    }
-#endif
-
-    O_pwlcurve	*o_pwlcurve = new(o_pwlcurvePool) O_pwlcurve( type, count, array, byte_stride, extTrimVertexPool.get((int)count) );
-    THREAD( do_pwlcurve, o_pwlcurve, do_freepwlcurve );
-}
-
-
-/*-----------------------------------------------------------------------------
- * nurbscurve -
- *
- * Client: GL user
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::nurbscurve(
-    long nknots, 		/* number of p knots */
-    INREAL knot[], 		/* nondecreasing knot values in p */
-    long byte_stride,		/* distance in bytes between control points */
-    INREAL ctlarray[], 		/* pointer to first control point */
-    long order,			/* order of spline */
-    long type )			/* description of range space */
-{
-
-    Mapdesc *mapdesc = maplist.locate( type );
-
-    if( mapdesc == 0 ) {
-	do_nurbserror( 35 );
-	isDataValid = 0;
-	return;
-    }
-
-    if( ctlarray == 0 ) {
-	do_nurbserror( 36 );
-	isDataValid = 0;
-	return;
-    }
-
-    if( byte_stride < 0 ) {
-	do_nurbserror( 34 );
-	isDataValid = 0;
-	return;
-    }
-
-    Knotvector knots;
-
-    knots.init( nknots, byte_stride, order, knot );
-    if( do_check_knots( &knots, "curve" ) ) return;
-    
-    O_nurbscurve *o_nurbscurve = new(o_nurbscurvePool) O_nurbscurve(type);
-    o_nurbscurve->bezier_curves = new(quiltPool) Quilt(mapdesc);
-    o_nurbscurve->bezier_curves->toBezier( knots,ctlarray, mapdesc->getNcoords() );
- 
-    THREAD( do_nurbscurve, o_nurbscurve, do_freenurbscurve );
-}
-
-
-/*-----------------------------------------------------------------------------
- * nurbssurface -
- *
- * Client: User routine
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::nurbssurface(
-    long sknot_count,		/* number of s knots */
-    INREAL sknot[],		/* nondecreasing knot values in s */
-    long tknot_count, 		/* number of t knots */
-    INREAL tknot[],		/* nondecreasing knot values in t */
-    long s_byte_stride,		/* s step size in memory bytes */
-    long t_byte_stride,		/* t step size in memory bytes */
-    INREAL ctlarray[],		/* pointer to first control point */
-    long sorder,		/* order of the spline in s parameter */
-    long torder,		/* order of the spline in t parameter */
-    long type)			/* description of range space */
-{ 
-    Mapdesc *mapdesc = maplist.locate( type );
-
-    if( mapdesc == 0 ) {
-	do_nurbserror( 35 );
-	isDataValid = 0;
-	return;
-    }
-
-    if( s_byte_stride < 0 ) {
-	do_nurbserror( 34 );
-	isDataValid = 0;
-	return;
-    }
-
-    if( t_byte_stride < 0 ) {
-	do_nurbserror( 34 );
-	isDataValid = 0;
-	return;
-    }
-
-    Knotvector sknotvector, tknotvector;
-
-    sknotvector.init( sknot_count, s_byte_stride, sorder, sknot );
-    if( do_check_knots( &sknotvector, "surface" ) ) return;
-
-    tknotvector.init( tknot_count, t_byte_stride, torder, tknot );
-    if( do_check_knots( &tknotvector, "surface" ) ) return;
-
-    O_nurbssurface *o_nurbssurface = new(o_nurbssurfacePool) O_nurbssurface(type);
-    o_nurbssurface->bezier_patches = new(quiltPool) Quilt(mapdesc);
-
-    o_nurbssurface->bezier_patches->toBezier( sknotvector, tknotvector,
-	ctlarray, mapdesc->getNcoords() ); 
-    THREAD( do_nurbssurface, o_nurbssurface, do_freenurbssurface );
-}
-
-
-/*-----------------------------------------------------------------------------
- * setnurbsproperty -
- * 
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::setnurbsproperty( long tag, INREAL value )
-{
-    if( ! renderhints.isProperty( tag ) ) {
-	do_nurbserror( 26 );
-    } else {
-	Property *prop = new(propertyPool) Property( tag, value );
-	THREAD( do_setnurbsproperty, prop, do_freenurbsproperty );
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * setnurbsproperty -
- * 
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::setnurbsproperty( long type, long tag, INREAL value )
-{
-    Mapdesc *mapdesc = maplist.locate( type );
-
-    if( mapdesc == 0 ) {
-	do_nurbserror( 35 );
-	return;
-    }
-
-    if( ! mapdesc->isProperty( tag ) ) {
-	do_nurbserror( 26 );
-	return;
-    }
-
-    Property *prop = new(propertyPool) Property( type, tag, value );
-    THREAD( do_setnurbsproperty2, prop, do_freenurbsproperty );
-}
-
-
-/*-----------------------------------------------------------------------------
- * getnurbsproperty - 
- * 
- *-----------------------------------------------------------------------------
- */
-
-void
-NurbsTessellator::getnurbsproperty( long tag, INREAL *value )
-{
-    if( renderhints.isProperty( tag ) ) {
-	*value = renderhints.getProperty( tag );
-    } else {
-	do_nurbserror( 26 );
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * getnurbsproperty - 
- * 
- *-----------------------------------------------------------------------------
- */
-
-void
-NurbsTessellator::getnurbsproperty( long type, long tag, INREAL *value )
-{
-    Mapdesc *mapdesc = maplist.locate( type );
-
-    if( mapdesc == 0 ) 
-	do_nurbserror( 35 );
-
-    if( mapdesc->isProperty( tag  ) ) {
-	*value = mapdesc->getProperty( tag );
-    } else {
-	do_nurbserror( 26 );
-    }
-}
-
-/*--------------------------------------------------------------------------
- * setnurbsproperty - accept a user supplied matrix as culling or sampling mat
- *--------------------------------------------------------------------------
- */
-
-void 
-NurbsTessellator::setnurbsproperty( long type, long purpose, INREAL *mat )
-{
-    // XXX - cannot be put in display list
-    Mapdesc *mapdesc = maplist.locate( type );
-
-    if( mapdesc == 0 ) {
-	do_nurbserror( 35 );
-	isDataValid = 0;
-    } else if( purpose == N_BBOXSIZE ) {
-	mapdesc->setBboxsize( mat );
-    } else {
-#ifndef NDEBUG
-        _glu_dprintf( "ERRORRORRORR!!!\n");
-#endif
-    }
-}
-
-/*--------------------------------------------------------------------------
- * setnurbsproperty - accept a user supplied matrix as culling or sampling mat
- *--------------------------------------------------------------------------
- */
-
-void 
-NurbsTessellator::setnurbsproperty( long type, long purpose, INREAL *mat, 
-    long rstride, long cstride )
-{
-    // XXX - cannot be put in display list
-    Mapdesc *mapdesc = maplist.locate( type );
-
-    if( mapdesc == 0 ) {
-	do_nurbserror( 35 );
-	isDataValid = 0;
-    } else if( purpose == N_CULLINGMATRIX ) {
-	mapdesc->setCmat( mat, rstride, cstride );
-    } else if( purpose == N_SAMPLINGMATRIX ) {
-	mapdesc->setSmat( mat, rstride, cstride );
-    } else if( purpose == N_BBOXMATRIX ) {
-	mapdesc->setBmat( mat, rstride, cstride );
-    } else {
-#ifndef NDEBUG
-        _glu_dprintf( "ERRORRORRORR!!!\n");
-#endif
-    }
-}
-
-void	
-NurbsTessellator::redefineMaps( void )
-{
-    maplist.initialize();
-}
-
-void 	
-NurbsTessellator::defineMap( long type, long rational, long ncoords )
-{
-    maplist.define( type, (int) rational, (int) ncoords );
-}
-
-void 
-NurbsTessellator::discardRecording( void *_dl )
-{
-    delete (DisplayList *) _dl;
-}
-
-void * 
-NurbsTessellator::beginRecording( void )
-{
-    dl = new DisplayList( this );
-    return (void *) dl;
-}
-
-void 
-NurbsTessellator::endRecording( void )
-{
-    dl->endList();
-    dl = 0;
-}
-
-void 
-NurbsTessellator::playRecording( void *_dl )
-{
-    playBack = 1;
-    bgnrender();
-    ((DisplayList *)_dl)->play();
-    endrender();
-    playBack = 0;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/nurbstess.cc b/src/glu/sgi/libnurbs/internals/nurbstess.cc
deleted file mode 100644
index e477a8c8334..00000000000
--- a/src/glu/sgi/libnurbs/internals/nurbstess.cc
+++ /dev/null
@@ -1,691 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * nurbstess.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mysetjmp.h"
-#include "mystdio.h"
-#include "nurbsconsts.h"
-#include "nurbstess.h"
-#include "bufpool.h"
-#include "quilt.h"
-#include "knotvector.h"
-#include "mapdesc.h"
-#include "maplist.h"
-
-void 
-NurbsTessellator::set_domain_distance_u_rate(REAL u_rate)
-{
-  subdivider.set_domain_distance_u_rate(u_rate);
-}
-
-void 
-NurbsTessellator::set_domain_distance_v_rate(REAL v_rate)
-{
-  subdivider.set_domain_distance_v_rate(v_rate);
-}
-
-void
-NurbsTessellator::set_is_domain_distance_sampling(int flag)
-{
-  subdivider.set_is_domain_distance_sampling(flag);
-}
-
-void
-NurbsTessellator::resetObjects( void )
-{
-    subdivider.clear();
-}
-
-void
-NurbsTessellator::makeobj( int )
-{
-#ifndef NDEBUG
-   _glu_dprintf( "makeobj\n" );
-#endif
-}
-
-void
-NurbsTessellator::closeobj( void )
-{
-#ifndef NDEBUG
-   _glu_dprintf( "closeobj\n" );
-#endif
-}
-
-void
-NurbsTessellator::bgnrender( void )
-{
-#ifndef NDEBUG
-   _glu_dprintf( "bgnrender\n" );
-#endif
-}
-
-void
-NurbsTessellator::endrender( void )
-{
-#ifndef NDEBUG
-    _glu_dprintf( "endrender\n" );
-#endif
-}
-
-/*-----------------------------------------------------------------------------
- * do_freebgnsurface - free o_surface structure 
- *
- * Client: do_freeall(), bgnsurface()
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_freebgnsurface( O_surface *o_surface )
-{
-    o_surface->deleteMe( o_surfacePool );
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_bgnsurface - begin the display of a surface
- *
- * Client: bgnsurface()
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_bgnsurface( O_surface *o_surface )
-{
-    if( inSurface ) {
-	do_nurbserror( 27 );
-	endsurface();
-    }
-    inSurface = 1;
-
-    if( ! playBack ) bgnrender();
-
-    isTrimModified = 0;
-    isSurfaceModified = 0;
-    isDataValid = 1;
-    numTrims = 0;
-    currentSurface = o_surface;
-    nextTrim = &( currentSurface->o_trim );
-    nextNurbssurface = &( currentSurface->o_nurbssurface );
-}
-
-/*-----------------------------------------------------------------------------
- * do_bgncurve - begin the display of a curve 
- * 
- * Client: bgncurve()
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_bgncurve( O_curve *o_curve )
-{
-    if ( inCurve ) {
-	do_nurbserror( 6 );
-	endcurve();
-    }
-
-    inCurve = 1;
-    currentCurve = o_curve;
-    currentCurve->curvetype = ct_none;
-
-    if( inTrim ) {
-        if( *nextCurve != o_curve ) {
-	    isCurveModified = 1;
-	    *nextCurve = o_curve;
-	}
-    } else {
-        if( ! playBack ) bgnrender();
-        isDataValid = 1;
-    }
-    nextCurve = &(o_curve->next);
-    nextPwlcurve = &(o_curve->curve.o_pwlcurve);
-    nextNurbscurve = &(o_curve->curve.o_nurbscurve);
-}
-
-/*-----------------------------------------------------------------------------
- * do_endcurve -
- * 
- * Client: endcurve()
- *-----------------------------------------------------------------------------
- */
-    
-void
-NurbsTessellator::do_endcurve( void )
-{
-    if( ! inCurve ) {
-	do_nurbserror( 7 );
-	return;
-    }
-    inCurve = 0;
-
-    *nextCurve = 0;
-    if (currentCurve->curvetype == ct_nurbscurve)
-	*nextNurbscurve = 0;
-    else
-	*nextPwlcurve = 0;
-
-    if ( ! inTrim ) {
-        if( ! isDataValid ) {
-            do_freecurveall( currentCurve ); 
-	    return;
-        }
-
-	int errval;
-	errval = ::mysetjmp( jumpbuffer );
-	if( errval == 0 ) {
-	    if( currentCurve->curvetype == ct_nurbscurve ) {
-		subdivider.beginQuilts();
-		for( O_nurbscurve *n = currentCurve->curve.o_nurbscurve; n != 0; n = n->next ) 
-		    subdivider.addQuilt( n->bezier_curves );
-		subdivider.endQuilts();
-		subdivider.drawCurves(); 
-		if( ! playBack ) endrender();
-	    } else {
-		/* XXX */
-	        if( ! playBack ) endrender();
-	        /*do_draw_pwlcurve( currentCurve->curve.o_pwlcurve ) */;
-	        do_nurbserror( 9 );
-	    }
-	} else {
-	    if( ! playBack ) endrender();
-	    do_nurbserror( errval );
-	}
-	do_freecurveall( currentCurve );
-	resetObjects();
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * do_endsurface - mark end of surface, display surface, free immediate data 
- *
- * Client:
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_endsurface( void )
-{
-    if( inTrim ) {
-	do_nurbserror( 12 );
-	endtrim();
-    }
-
-    if( ! inSurface ) {
-	do_nurbserror( 13 );
-	return;
-    }
-    inSurface = 0;
-
-    *nextNurbssurface = 0;
-
-    if( ! isDataValid ) {
-        do_freeall( ); 
-	return;
-    }
-
-    if( *nextTrim != 0 ) {
-	isTrimModified = 1;
-        *nextTrim = 0;
-    }
-
-    int errval;
-
-    errval = ::mysetjmp( jumpbuffer );
-    if( errval == 0 ) {
-        if( numTrims > 0 ) {
-
-	    subdivider.beginTrims();
-	    for( O_trim	*trim = currentSurface->o_trim; trim; trim = trim->next ) {
-		subdivider.beginLoop();
-		for( O_curve *curve = trim->o_curve; curve; curve = curve->next ) {  
-		    curve->used = 0;
-		    assert( curve->curvetype != ct_none );
-		    if (curve->curvetype == ct_pwlcurve) {
-			O_pwlcurve *c = curve->curve.o_pwlcurve; 
-			subdivider.addArc( c->npts, c->pts, curve->nuid );
-		    } else {
-			Quilt	   *quilt = curve->curve.o_nurbscurve->bezier_curves;
-			Quiltspec  *qspec = quilt->qspec;
-			REAL       *cpts  = quilt->cpts + qspec->offset;
-			REAL       *cptsend = cpts + (qspec->width * qspec->order * qspec->stride);
-			for( ; cpts != cptsend; cpts += qspec->order*qspec->stride ) 
-			     subdivider.addArc( cpts, quilt, curve->nuid );
-		    }
-		}
-		subdivider.endLoop();
-	    }
-	    subdivider.endTrims();
-	}
-
-	subdivider.beginQuilts();
-	for( O_nurbssurface *n = currentSurface->o_nurbssurface; n; n = n->next ) 
-	    subdivider.addQuilt( n->bezier_patches );
-	subdivider.endQuilts();
-        subdivider.drawSurfaces( currentSurface->nuid ); 
-	if( ! playBack ) endrender();
-    } else {
-	if( ! playBack ) endrender();
-	do_nurbserror( errval );
-    }
-
-    do_freeall( );
-    resetObjects();
-}
-
-/*-----------------------------------------------------------------------------
- * do_freeall - free all data allocated in immediate mode
- *
- * Client:
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_freeall( void )
-{
-    for( O_trim *o_trim = currentSurface->o_trim; o_trim; ) {
-	O_trim *next_o_trim = o_trim->next;
-        for( O_curve *curve = o_trim->o_curve; curve; ) {
-	    O_curve *next_o_curve = curve->next;
-	    do_freecurveall( curve );
-	    curve = next_o_curve;
-	}
-	if( o_trim->save == 0 ) do_freebgntrim( o_trim );
-	o_trim = next_o_trim;
-    }
-
-    O_nurbssurface *nurbss, *next_nurbss;
-    for( nurbss= currentSurface->o_nurbssurface; nurbss; nurbss = next_nurbss) {
-	next_nurbss = nurbss->next;
-	if( nurbss->save == 0 )
-	    do_freenurbssurface( nurbss );
-	else
-	    nurbss->used = 0;
-    }
-
-    if( currentSurface->save == 0 ) do_freebgnsurface( currentSurface );
-}
-
-void
-NurbsTessellator::do_freecurveall( O_curve *curve )
-{
-    assert( curve->curvetype != ct_none );
-
-    if( curve->curvetype == ct_nurbscurve ) {
-	O_nurbscurve *ncurve, *next_ncurve;
-	for( ncurve=curve->curve.o_nurbscurve; ncurve; ncurve=next_ncurve ) {
-	    next_ncurve = ncurve->next;
-	    if( ncurve->save == 0 )
-		do_freenurbscurve( ncurve );
-	    else
-		ncurve->used = 0;
-	}
-    } else {
-	O_pwlcurve *pcurve, *next_pcurve;
-	for( pcurve=curve->curve.o_pwlcurve; pcurve; pcurve=next_pcurve ) {
-	    next_pcurve = pcurve->next;
-	    if( pcurve->save == 0 )
-		do_freepwlcurve( pcurve );
-	    else
-		pcurve->used = 0;
-	}
-    }
-    if( curve->save == 0 )
-        do_freebgncurve( curve );
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_freebgntrim - free the space allocated for a trim loop
- *
- * Client:
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_freebgntrim( O_trim *o_trim )
-{ 
-    o_trim->deleteMe( o_trimPool );
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_bgntrim - link in a trim loop to the current trimmed surface description
- *
- * Client: bgntrim()
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_bgntrim( O_trim *o_trim )
-{
-
-    if( ! inSurface ) {
-	do_nurbserror( 15 );
-	bgnsurface( 0 );
-	inSurface = 2;
-    }
-
-    if( inTrim ) {
-	do_nurbserror( 16 );
-	endtrim();
-    }
-    inTrim = 1;
-
-    if( *nextTrim != o_trim ) {
-	isTrimModified = 1;	
-        *nextTrim = o_trim;
-    }
-
-    currentTrim = o_trim;
-    nextTrim = &(o_trim->next);
-    nextCurve = &(o_trim->o_curve);
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_endtrim - mark the end of the current trim loop 
- *
- * Client: endtrim()
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_endtrim( void )
-{
-    if( ! inTrim ) {
-	do_nurbserror( 17 );
-	return;
-    }
-    inTrim = 0;
-
-    if( currentTrim->o_curve == 0 ) {
-	do_nurbserror( 18 );
-	isDataValid = 0;
-    }
-
-    numTrims++;
-   
-    if( *nextCurve != 0 ) {
-	isTrimModified = 1;
-        *nextCurve = 0;	
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * do_freepwlcurve -
- * 
- * Client:
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_freepwlcurve( O_pwlcurve *o_pwlcurve )
-{
-    o_pwlcurve->deleteMe( o_pwlcurvePool );
-}
-
-void
-NurbsTessellator::do_freebgncurve( O_curve *o_curve )
-{
-    o_curve->deleteMe( o_curvePool );
-}
-
-/*-----------------------------------------------------------------------------
- * do_pwlcurve - link in pwl trim loop to the current surface description
- * 
- * Client: pwlcurve()
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_pwlcurve( O_pwlcurve *o_pwlcurve )
-{
-    if( ! inTrim ) {
-	do_nurbserror( 19 );
-	if( o_pwlcurve->save == 0 )
-	    do_freepwlcurve(o_pwlcurve );
-	return;
-    }
-
-    if( ! inCurve ) {
-	bgncurve( 0 );
-	inCurve = 2;
-    }
-
-    if( o_pwlcurve->used ) {
-	do_nurbserror( 20 );
-	isDataValid = 0;
-	return;
-    } else
-        o_pwlcurve->used = 1;
-
-    if( currentCurve->curvetype == ct_none ) {
-        currentCurve->curvetype = ct_pwlcurve;
-    } else if( currentCurve->curvetype != ct_pwlcurve ) {
-	do_nurbserror( 21 );
-	isDataValid = 0;
-	return;
-    }
-	
-    if( *nextPwlcurve != o_pwlcurve ) {
-	isCurveModified = 1;
-        *nextPwlcurve = o_pwlcurve;
-    }
-    nextPwlcurve = &(o_pwlcurve->next);
-
-    if( o_pwlcurve->owner != currentCurve ) {
-	isCurveModified = 1;
-	o_pwlcurve->owner = currentCurve;
-    }
-
-    if( inCurve == 2 ) 
-	endcurve();
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_freenurbscurve -
- * 
- * Client:
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_freenurbscurve( O_nurbscurve *o_nurbscurve )
-{
-    o_nurbscurve->bezier_curves->deleteMe( quiltPool );
-    o_nurbscurve->deleteMe( o_nurbscurvePool );
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_nurbscurve -
- * 
- * Client: nurbscurve() 
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_nurbscurve( O_nurbscurve *o_nurbscurve )
-{
-    if ( ! inCurve ) {
-	bgncurve( 0 );
-	inCurve = 2;
-    }
-
-    if( o_nurbscurve->used ) {
-	/* error - curve was already called in current surface */
-	do_nurbserror( 23 );
-	isDataValid = 0;
-	return;
-    } else
-        o_nurbscurve->used = 1;
-
-    if( currentCurve->curvetype == ct_none ) {
-        currentCurve->curvetype = ct_nurbscurve;
-    } else if( currentCurve->curvetype != ct_nurbscurve ) {
-	do_nurbserror( 24 );
-	isDataValid = 0;
-	return;
-    }
-	
-    if( *nextNurbscurve != o_nurbscurve ) {
-	isCurveModified = 1;
-	*nextNurbscurve = o_nurbscurve;
-    }
-
-    nextNurbscurve = &(o_nurbscurve->next);
-
-    if( o_nurbscurve->owner != currentCurve ) {
-	isCurveModified = 1;
-	o_nurbscurve->owner = currentCurve;
-    }
-
-    if( o_nurbscurve->owner == 0 )
-	isCurveModified = 1;
-    
-    if( inCurve == 2 )
-        endcurve();
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_freenurbssurface -
- *
- * Client:
- *-----------------------------------------------------------------------------
- */
-
-void
-NurbsTessellator::do_freenurbssurface( O_nurbssurface *o_nurbssurface )
-{
-    o_nurbssurface->bezier_patches->deleteMe( quiltPool );
-    o_nurbssurface->deleteMe( o_nurbssurfacePool );
-}
-
-/*-----------------------------------------------------------------------------
- * do_nurbssurface -
- * 
- * Client: nurbssurface()
- *-----------------------------------------------------------------------------
- */
-void
-NurbsTessellator::do_nurbssurface( O_nurbssurface *o_nurbssurface )
-{
-    if( ! inSurface ) {
-	bgnsurface( 0 );
-	inSurface = 2;
-    }
-
-    if( o_nurbssurface->used ) {
-	/* error - surface was already called in current block */
-	do_nurbserror( 25 );
-	isDataValid = 0;
-	return;
-    } else
-        o_nurbssurface->used = 1;
-
-    if( *nextNurbssurface != o_nurbssurface ) {
-	isSurfaceModified = 1;
-        *nextNurbssurface  = o_nurbssurface;
-    }
-
-    if( o_nurbssurface->owner != currentSurface ) {
-	isSurfaceModified = 1;
-	o_nurbssurface->owner = currentSurface;
-    }
-    nextNurbssurface = &(o_nurbssurface->next);
-
-    if( inSurface == 2  )
-	endsurface();
-}
-
-
-/*-----------------------------------------------------------------------------
- * do_freenurbsproperty
- * 
- *-----------------------------------------------------------------------------
- */
-
-void
-NurbsTessellator::do_freenurbsproperty( Property *prop )
-{
-    prop->deleteMe( propertyPool );
-}
-
-    
-/*-----------------------------------------------------------------------------
- * do_setnurbsproperty -
- * 
- *-----------------------------------------------------------------------------
- */
-
-void
-NurbsTessellator::do_setnurbsproperty( Property *prop )
-{
-    renderhints.setProperty( prop->tag, prop->value );
-    if( prop->save == 0 )
-	do_freenurbsproperty( prop );
-}
-
-void
-NurbsTessellator::do_setnurbsproperty2( Property *prop )
-{
-    Mapdesc *mapdesc = maplist.find( prop->type );
-
-    mapdesc->setProperty( prop->tag, prop->value );
-    if( prop->save == 0 )
-	do_freenurbsproperty( prop );
-}
-
-void
-NurbsTessellator::errorHandler( int )
-{
-}
-
-void
-NurbsTessellator::do_nurbserror( int msg )
-{
-    errorHandler( msg );
-}
-
-int 
-NurbsTessellator::do_check_knots( Knotvector *knots, const char *msg )
-{
-    int status = knots->validate();
-    if( status ) {
-	do_nurbserror( status );
-        if( renderhints.errorchecking != N_NOMSG ) knots->show( msg );
-    }
-    return status;
-}
-
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/internals/nurbstess.h b/src/glu/sgi/libnurbs/internals/nurbstess.h
deleted file mode 100644
index a6869002fb6..00000000000
--- a/src/glu/sgi/libnurbs/internals/nurbstess.h
+++ /dev/null
@@ -1,172 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * nurbstess.h
- *
- */
-
-#ifndef __glunurbstess_h_
-#define __glunurbstess_h_
-
-#include "mysetjmp.h"
-#include "subdivider.h"
-#include "renderhints.h"
-#include "backend.h"
-#include "maplist.h"
-#include "reader.h"
-#include "nurbsconsts.h"
-
-struct Knotvector;
-class Quilt;
-class DisplayList;
-class BasicCurveEvaluator;
-class BasicSurfaceEvaluator;
-
-class NurbsTessellator {
-public:
-    			NurbsTessellator( BasicCurveEvaluator &c,
-                                          BasicSurfaceEvaluator &e );
-    			virtual ~NurbsTessellator( void );
-
-    void     		getnurbsproperty( long, INREAL * );
-    void     		getnurbsproperty( long, long, INREAL * );
-    void     		setnurbsproperty( long, INREAL );
-    void     		setnurbsproperty( long, long, INREAL );
-    void		setnurbsproperty( long, long, INREAL * );
-    void		setnurbsproperty( long, long, INREAL *, long, long );
-
-    // called before a tessellation begins/ends
-    virtual void	bgnrender( void );
-    virtual void	endrender( void );
-
-    // called to make a display list of the output vertices
-    virtual void	makeobj( int n );
-    virtual void	closeobj( void );
-
-    // called when a error occurs
-    virtual void	errorHandler( int );
-
-    void     		bgnsurface( long );
-    void     		endsurface( void );
-    void     		bgntrim( void );
-    void     		endtrim( void );
-    void     		bgncurve( long );
-    void     		endcurve( void );
-    void     		pwlcurve( long, INREAL[], long, long );
-    void     		nurbscurve( long, INREAL[], long, INREAL[], long, long );
-    void     		nurbssurface( long, INREAL[], long, INREAL[], long, long,
-			    INREAL[], long, long, long );
-
-    void 		defineMap( long, long, long );
-    void		redefineMaps( void );
-
-    // recording of input description
-    void 		discardRecording( void * );
-    void * 		beginRecording( void );
-    void 		endRecording( void );
-    void 		playRecording( void * );
-
-    //for optimizing untrimmed nurbs in the case of domain distance sampling
-    void set_domain_distance_u_rate(REAL u_rate);
-    void set_domain_distance_v_rate(REAL v_rate);
-    void set_is_domain_distance_sampling(int flag);
-    
-
-protected:
-    Renderhints		renderhints;
-    Maplist		maplist;
-    Backend		backend;
-
-private:
-
-    void		resetObjects( void );
-    int			do_check_knots( Knotvector *, const char * );
-    void		do_nurbserror( int );
-    void		do_bgncurve( O_curve * );
-    void		do_endcurve( void );
-    void		do_freeall( void );
-    void		do_freecurveall( O_curve * );
-    void		do_freebgntrim( O_trim * );
-    void		do_freebgncurve( O_curve * );
-    void		do_freepwlcurve( O_pwlcurve * );
-    void		do_freenurbscurve( O_nurbscurve * );
-    void		do_freenurbssurface( O_nurbssurface * );
-    void 		do_freebgnsurface( O_surface * );
-    void		do_bgnsurface( O_surface * );
-    void		do_endsurface( void );
-    void		do_bgntrim( O_trim * );
-    void		do_endtrim( void );
-    void		do_pwlcurve( O_pwlcurve * );
-    void		do_nurbscurve( O_nurbscurve * );
-    void		do_nurbssurface( O_nurbssurface * );
-    void		do_freenurbsproperty( Property * );
-    void		do_setnurbsproperty( Property * );
-    void		do_setnurbsproperty2( Property * );
-
-    Subdivider		subdivider;
-    JumpBuffer* 	jumpbuffer;
-    Pool		o_pwlcurvePool;
-    Pool		o_nurbscurvePool;
-    Pool		o_curvePool;
-    Pool		o_trimPool;
-    Pool		o_surfacePool;
-    Pool		o_nurbssurfacePool;
-    Pool		propertyPool;
-public:
-    Pool		quiltPool;
-private:
-    TrimVertexPool	extTrimVertexPool;
-
-    int			inSurface;		/* bgnsurface seen */
-    int			inCurve;		/* bgncurve seen */
-    int			inTrim;			/* bgntrim seen */
-    int			isCurveModified;	/* curve changed */
-    int			isTrimModified;		/* trim curves changed */
-    int			isSurfaceModified;	/* surface changed */
-    int			isDataValid;		/* all data is good */
-    int			numTrims;		/* valid trim regions */
-    int			playBack;
-
-    O_trim**		nextTrim;		/* place to link o_trim */
-    O_curve**		nextCurve;		/* place to link o_curve */
-    O_nurbscurve**	nextNurbscurve;		/* place to link o_nurbscurve */
-    O_pwlcurve**	nextPwlcurve;		/* place to link o_pwlcurve */
-    O_nurbssurface**	nextNurbssurface;	/* place to link o_nurbssurface */
-
-    O_surface*		currentSurface;
-    O_trim*		currentTrim;
-    O_curve*		currentCurve;
-
-    DisplayList		*dl;
-
-};
-
-#endif /* __glunurbstess_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/patch.cc b/src/glu/sgi/libnurbs/internals/patch.cc
deleted file mode 100644
index 808baa69e44..00000000000
--- a/src/glu/sgi/libnurbs/internals/patch.cc
+++ /dev/null
@@ -1,504 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * patch.c++
- *
- */
-
-#include <stdio.h>
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "mymath.h"
-#include "mystring.h"
-#include "patch.h"
-#include "mapdesc.h"
-#include "quilt.h"
-#include "nurbsconsts.h"
-#include "simplemath.h" //for glu_abs function in ::singleStep();
-
-
-/*--------------------------------------------------------------------------
- * Patch - copy patch from quilt and transform control points
- *--------------------------------------------------------------------------
- */
-
-Patch::Patch( Quilt_ptr geo, REAL *pta, REAL *ptb, Patch *n )
-{
-/* pspec[i].range is uninit here */
-    mapdesc = geo->mapdesc;
-    cullval = mapdesc->isCulling() ? CULL_ACCEPT : CULL_TRIVIAL_ACCEPT;
-    notInBbox = mapdesc->isBboxSubdividing() ? 1 : 0;
-    needsSampling = mapdesc->isRangeSampling() ? 1 : 0;
-    pspec[0].order = geo->qspec[0].order;
-    pspec[1].order = geo->qspec[1].order;
-    pspec[0].stride = pspec[1].order * MAXCOORDS;
-    pspec[1].stride = MAXCOORDS;
-
-    /* transform control points to sampling and culling spaces */
-    REAL *ps  = geo->cpts;
-    geo->select( pta, ptb );
-    ps += geo->qspec[0].offset;
-    ps += geo->qspec[1].offset;
-    ps += geo->qspec[0].index * geo->qspec[0].order * geo->qspec[0].stride;
-    ps += geo->qspec[1].index * geo->qspec[1].order * geo->qspec[1].stride;
-
-    if( needsSampling ) {
-	mapdesc->xformSampling( ps, geo->qspec[0].order, geo->qspec[0].stride, 
-				geo->qspec[1].order, geo->qspec[1].stride,
-			        spts, pspec[0].stride, pspec[1].stride );
-    }
-
-    if( cullval == CULL_ACCEPT  ) {
-	mapdesc->xformCulling( ps, geo->qspec[0].order, geo->qspec[0].stride, 
-			       geo->qspec[1].order, geo->qspec[1].stride,
-			       cpts, pspec[0].stride, pspec[1].stride ); 
-    }
-    
-    if( notInBbox ) {
-	mapdesc->xformBounding( ps, geo->qspec[0].order, geo->qspec[0].stride, 
-			       geo->qspec[1].order, geo->qspec[1].stride,
-			       bpts, pspec[0].stride, pspec[1].stride ); 
-    }
-    
-    /* set scale range */
-    pspec[0].range[0] = geo->qspec[0].breakpoints[geo->qspec[0].index];
-    pspec[0].range[1] = geo->qspec[0].breakpoints[geo->qspec[0].index+1];
-    pspec[0].range[2] = pspec[0].range[1] - pspec[0].range[0];
-
-    pspec[1].range[0] = geo->qspec[1].breakpoints[geo->qspec[1].index];
-    pspec[1].range[1] = geo->qspec[1].breakpoints[geo->qspec[1].index+1];
-    pspec[1].range[2] = pspec[1].range[1] - pspec[1].range[0];
-
-    // may need to subdivide to match range of sub-patch
-    if( pspec[0].range[0] != pta[0] ) {
-	assert( pspec[0].range[0] < pta[0] );
-	Patch lower( *this, 0, pta[0], 0 );
-	*this = lower;
-    }
-
-    if( pspec[0].range[1] != ptb[0] ) {
-	assert( pspec[0].range[1] > ptb[0] );
-	Patch upper( *this, 0, ptb[0], 0 );
-    }
-
-    if( pspec[1].range[0] != pta[1] ) {
-	assert( pspec[1].range[0] < pta[1] );
-	Patch lower( *this, 1, pta[1], 0 );
-	*this = lower;
-    }
-
-    if( pspec[1].range[1] != ptb[1] ) {
-	assert( pspec[1].range[1] > ptb[1] );
-	Patch upper( *this, 1, ptb[1], 0 );
-    }
-    checkBboxConstraint();
-    next = n;
-}
-
-/*--------------------------------------------------------------------------
- * Patch - subdivide a patch along an isoparametric line
- *--------------------------------------------------------------------------
- */
-
-Patch::Patch( Patch& upper, int param, REAL value, Patch *n )
-{
-    Patch& lower = *this;
-
-    lower.cullval = upper.cullval;
-    lower.mapdesc = upper.mapdesc;
-    lower.notInBbox = upper.notInBbox;
-    lower.needsSampling = upper.needsSampling;
-    lower.pspec[0].order = upper.pspec[0].order;
-    lower.pspec[1].order = upper.pspec[1].order;
-    lower.pspec[0].stride = upper.pspec[0].stride;
-    lower.pspec[1].stride = upper.pspec[1].stride;
-    lower.next = n;
-
-    /* reset scale range */
-    switch( param ) {
-	case 0: {
-    	    REAL d = (value-upper.pspec[0].range[0]) / upper.pspec[0].range[2];
-	    if( needsSampling )
-                mapdesc->subdivide( upper.spts, lower.spts, d, pspec[1].order,
-                        pspec[1].stride, pspec[0].order, pspec[0].stride );
-
-    	    if( cullval == CULL_ACCEPT ) 
-	        mapdesc->subdivide( upper.cpts, lower.cpts, d, pspec[1].order,
-                        pspec[1].stride, pspec[0].order, pspec[0].stride );
-
-    	    if( notInBbox ) 
-	        mapdesc->subdivide( upper.bpts, lower.bpts, d, pspec[1].order,
-                        pspec[1].stride, pspec[0].order, pspec[0].stride );
-	    
-            lower.pspec[0].range[0] = upper.pspec[0].range[0];
-            lower.pspec[0].range[1] = value;
-    	    lower.pspec[0].range[2] = value - upper.pspec[0].range[0];
-            upper.pspec[0].range[0] = value;
-    	    upper.pspec[0].range[2] = upper.pspec[0].range[1] - value;
-
-            lower.pspec[1].range[0] = upper.pspec[1].range[0];
-            lower.pspec[1].range[1] = upper.pspec[1].range[1];
-    	    lower.pspec[1].range[2] = upper.pspec[1].range[2];
-	    break;
-	}
-	case 1: {
-    	    REAL d = (value-upper.pspec[1].range[0]) / upper.pspec[1].range[2];
-	    if( needsSampling )
-	        mapdesc->subdivide( upper.spts, lower.spts, d, pspec[0].order,
-                        pspec[0].stride, pspec[1].order, pspec[1].stride );
-    	    if( cullval == CULL_ACCEPT ) 
-	        mapdesc->subdivide( upper.cpts, lower.cpts, d, pspec[0].order,
-                        pspec[0].stride, pspec[1].order, pspec[1].stride );
-    	    if( notInBbox ) 
-	        mapdesc->subdivide( upper.bpts, lower.bpts, d, pspec[0].order,
-                        pspec[0].stride, pspec[1].order, pspec[1].stride );
-            lower.pspec[0].range[0] = upper.pspec[0].range[0];
-            lower.pspec[0].range[1] = upper.pspec[0].range[1];
-    	    lower.pspec[0].range[2] = upper.pspec[0].range[2];
-
-            lower.pspec[1].range[0] = upper.pspec[1].range[0];
-            lower.pspec[1].range[1] = value;
-    	    lower.pspec[1].range[2] = value - upper.pspec[1].range[0];
-            upper.pspec[1].range[0] = value;
-    	    upper.pspec[1].range[2] = upper.pspec[1].range[1] - value;
-	    break;
-	}
-    }
-
-    // inherit bounding box
-    if( mapdesc->isBboxSubdividing() && ! notInBbox )
-	memcpy( lower.bb, upper.bb, sizeof( bb ) );
-	    
-    lower.checkBboxConstraint();
-    upper.checkBboxConstraint();
-}
-
-/*--------------------------------------------------------------------------
- * clamp - clamp the sampling rate to a given maximum
- *--------------------------------------------------------------------------
- */
-
-void
-Patch::clamp( void )
-{
-    if( mapdesc->clampfactor != N_NOCLAMPING ) {
-	pspec[0].clamp( mapdesc->clampfactor );
-	pspec[1].clamp( mapdesc->clampfactor );
-    }
-}
-
-void 
-Patchspec::clamp( REAL clampfactor )
-{
-    if( sidestep[0] < minstepsize )
-        sidestep[0] = clampfactor * minstepsize;
-    if( sidestep[1] < minstepsize )
-        sidestep[1] = clampfactor * minstepsize;
-    if( stepsize < minstepsize )
-        stepsize = clampfactor * minstepsize;
-}
-
-void 
-Patch::checkBboxConstraint( void )
-{
-    if( notInBbox && 
-	mapdesc->bboxTooBig( bpts, pspec[0].stride, pspec[1].stride,
-				   pspec[0].order, pspec[1].order, bb ) != 1 ) {
-	notInBbox = 0;
-    }
-}
-
-void
-Patch::bbox( void )
-{
-    if( mapdesc->isBboxSubdividing() )
-	mapdesc->surfbbox( bb );
-}
-
-/*--------------------------------------------------------------------------
- * getstepsize - compute the sampling density across the patch
- * 		and determine if patch needs to be subdivided
- *--------------------------------------------------------------------------
- */
-
-void
-Patch::getstepsize( void )
-{
-    pspec[0].minstepsize = pspec[1].minstepsize = 0;
-    pspec[0].needsSubdivision = pspec[1].needsSubdivision = 0;
-
-    if( mapdesc->isConstantSampling() ) {
-	// fixed number of samples per patch in each direction
-	// maxsrate is number of s samples per patch
-	// maxtrate is number of t samples per patch
-        pspec[0].getstepsize( mapdesc->maxsrate );
-        pspec[1].getstepsize( mapdesc->maxtrate );
-
-    } else if( mapdesc->isDomainSampling() ) {
-	// maxsrate is number of s samples per unit s length of domain
-	// maxtrate is number of t samples per unit t length of domain
-        pspec[0].getstepsize( mapdesc->maxsrate * pspec[0].range[2] );
-        pspec[1].getstepsize( mapdesc->maxtrate * pspec[1].range[2] );
-
-    } else if( ! needsSampling ) {
-	pspec[0].singleStep();
-	pspec[1].singleStep();
-    } else {
-	// upper bound on path length between sample points
-        REAL tmp[MAXORDER][MAXORDER][MAXCOORDS];
-	const int trstride = sizeof(tmp[0]) / sizeof(REAL);
-	const int tcstride = sizeof(tmp[0][0]) / sizeof(REAL); 
-
-	assert( pspec[0].order <= MAXORDER );
-    
-	/* points have been transformed, therefore they are homogeneous */
-
-	int val = mapdesc->project( spts, pspec[0].stride, pspec[1].stride, 
-		 &tmp[0][0][0], trstride, tcstride, 
-		 pspec[0].order, pspec[1].order ); 
-        if( val == 0 ) {
-	    // control points cross infinity, therefore partials are undefined
-            pspec[0].getstepsize( mapdesc->maxsrate );
-            pspec[1].getstepsize( mapdesc->maxtrate );
-        } else {
-            REAL t1 = mapdesc->getProperty( N_PIXEL_TOLERANCE );
-//	    REAL t2 = mapdesc->getProperty( N_ERROR_TOLERANCE );
-	    pspec[0].minstepsize = ( mapdesc->maxsrate > 0.0 ) ? 
-			(pspec[0].range[2] / mapdesc->maxsrate) : 0.0;
-	    pspec[1].minstepsize = ( mapdesc->maxtrate > 0.0 ) ? 
-			(pspec[1].range[2] / mapdesc->maxtrate) : 0.0;
-	    if( mapdesc->isParametricDistanceSampling() ||
-                mapdesc->isObjectSpaceParaSampling() ) {       
-
-                REAL t2;
-                t2 = mapdesc->getProperty( N_ERROR_TOLERANCE );
-		
-		// t2 is upper bound on the distance between surface and tessellant 
-		REAL ssv[2], ttv[2];
-		REAL ss = mapdesc->calcPartialVelocity( ssv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 2, 0, pspec[0].range[2], pspec[1].range[2], 0 );
-		REAL st = mapdesc->calcPartialVelocity(   0, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 1, 1, pspec[0].range[2], pspec[1].range[2], -1 );
-		REAL tt = mapdesc->calcPartialVelocity( ttv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 0, 2, pspec[0].range[2], pspec[1].range[2], 1 );
-	        //make sure that ss st and tt are nonnegative:
- 	        if(ss <0) ss = -ss;
-	        if(st <0) st = -st;
-                if(tt <0) tt = -tt;
-
-		if( ss != 0.0 && tt != 0.0 ) {
-		    /* printf( "ssv[0] %g ssv[1] %g ttv[0] %g ttv[1] %g\n", 
-			ssv[0], ssv[1], ttv[0], ttv[1] ); */
-		    REAL ttq = sqrtf( (float) ss );
-		    REAL ssq = sqrtf( (float) tt );
-		    REAL ds = sqrtf( 4 * t2 * ttq / ( ss * ttq + st * ssq ) );
-		    REAL dt = sqrtf( 4 * t2 * ssq / ( tt * ssq + st * ttq ) );
-		    pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
-		    REAL scutoff = 2.0 * t2 / ( pspec[0].range[2] * pspec[0].range[2]);
-		    pspec[0].sidestep[0] = (ssv[0] > scutoff) ? sqrtf( 2.0 * t2 / ssv[0] ) : pspec[0].range[2];
-		    pspec[0].sidestep[1] = (ssv[1] > scutoff) ? sqrtf( 2.0 * t2 / ssv[1] ) : pspec[0].range[2];
-    
-		    pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
-		    REAL tcutoff = 2.0 * t2 / ( pspec[1].range[2] * pspec[1].range[2]);
-		    pspec[1].sidestep[0] = (ttv[0] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[0] ) : pspec[1].range[2];
-		    pspec[1].sidestep[1] = (ttv[1] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[1] ) : pspec[1].range[2];
-		} else if( ss != 0.0 ) {
-		    REAL x = pspec[1].range[2] * st;
-		    REAL ds = ( sqrtf( x * x + 8.0 * t2 * ss ) - x ) / ss;
-		    pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
-		    REAL scutoff = 2.0 * t2 / ( pspec[0].range[2] * pspec[0].range[2]);
-		    pspec[0].sidestep[0] = (ssv[0] > scutoff) ? sqrtf( 2.0 * t2 / ssv[0] ) : pspec[0].range[2];
-		    pspec[0].sidestep[1] = (ssv[1] > scutoff) ? sqrtf( 2.0 * t2 / ssv[1] ) : pspec[0].range[2];
-		    pspec[1].singleStep();
-		} else if( tt != 0.0 ) {
-		    REAL x = pspec[0].range[2] * st;
-		    REAL dt = ( sqrtf( x * x + 8.0 * t2 * tt ) - x )  / tt;
-		    pspec[0].singleStep();
-		    REAL tcutoff = 2.0 * t2 / ( pspec[1].range[2] * pspec[1].range[2]);
-		    pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
-		    pspec[1].sidestep[0] = (ttv[0] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[0] ) : pspec[1].range[2];
-		    pspec[1].sidestep[1] = (ttv[1] > tcutoff) ? sqrtf( 2.0 * t2 / ttv[1] ) : pspec[1].range[2];
-		} else {
-		    if( 4.0 * t2  > st * pspec[0].range[2] * pspec[1].range[2] ) {
-			pspec[0].singleStep();
-			pspec[1].singleStep();
-		    } else {
-			REAL area = 4.0 * t2 / st;
-			REAL ds = sqrtf( area * pspec[0].range[2] / pspec[1].range[2] );
-			REAL dt = sqrtf( area * pspec[1].range[2] / pspec[0].range[2] );
-			pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
-			pspec[0].sidestep[0] = pspec[0].range[2];
-			pspec[0].sidestep[1] = pspec[0].range[2];
-	
-			pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
-			pspec[1].sidestep[0] = pspec[1].range[2];
-			pspec[1].sidestep[1] = pspec[1].range[2];
-		    }
-		}	
-	    } else if( mapdesc->isPathLengthSampling() ||
-		      mapdesc->isObjectSpacePathSampling()) {
-		// t1 is upper bound on path length
-		REAL msv[2], mtv[2];
-		REAL ms = mapdesc->calcPartialVelocity( msv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 1, 0, pspec[0].range[2], pspec[1].range[2], 0 );
-		REAL mt = mapdesc->calcPartialVelocity( mtv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 0, 1, pspec[0].range[2], pspec[1].range[2], 1 );
-                REAL side_scale = 1.0;
-
-		if( ms != 0.0 ) {
-		    if( mt != 0.0 ) {
-/*		    REAL d = t1 / ( ms * ms + mt * mt );*/
-/*		    REAL ds = mt * d;*/
-		    REAL ds = t1 / (2.0*ms);
-/*		    REAL dt = ms * d;*/
-		    REAL dt = t1 / (2.0*mt); 
-			pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
-			pspec[0].sidestep[0] = ( msv[0] * pspec[0].range[2] > t1 ) ? (side_scale* t1 / msv[0]) : pspec[0].range[2];
-			pspec[0].sidestep[1] = ( msv[1] * pspec[0].range[2] > t1 ) ? (side_scale* t1 / msv[1]) : pspec[0].range[2];
-	
-			pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
-			pspec[1].sidestep[0] = ( mtv[0] * pspec[1].range[2] > t1 ) ? (side_scale*t1 / mtv[0]) : pspec[1].range[2];
-			pspec[1].sidestep[1] = ( mtv[1] * pspec[1].range[2] > t1 ) ? (side_scale*t1 / mtv[1]) : pspec[1].range[2];
-		    } else {
-			pspec[0].stepsize = ( t1 < ms * pspec[0].range[2] ) ? (t1 / ms) : pspec[0].range[2];
-			pspec[0].sidestep[0] = ( msv[0] * pspec[0].range[2] > t1 ) ? (t1 / msv[0]) : pspec[0].range[2];
-			pspec[0].sidestep[1] = ( msv[1] * pspec[0].range[2] > t1 ) ? (t1 / msv[1]) : pspec[0].range[2];
-	
-			pspec[1].singleStep();
-		    }
-		} else {
-		    if( mt != 0.0 ) {
-			pspec[0].singleStep();
-
-			pspec[1].stepsize = ( t1 < mt * pspec[1].range[2] ) ? (t1 / mt) : pspec[1].range[2];
-			pspec[1].sidestep[0] = ( mtv[0] * pspec[1].range[2] > t1 ) ? (t1 / mtv[0]) : pspec[1].range[2];
-			pspec[1].sidestep[1] = ( mtv[1] * pspec[1].range[2] > t1 ) ? (t1 / mtv[1]) : pspec[1].range[2];
-		    } else {
-			pspec[0].singleStep();
-			pspec[1].singleStep();
-		    }
-		}
-	    } else if( mapdesc->isSurfaceAreaSampling() ) {
-		// t is the square root of area
-/*
-		REAL msv[2], mtv[2];
-		REAL ms = mapdesc->calcPartialVelocity( msv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 1, 0, pspec[0].range[2], pspec[1].range[2], 0 );
-		REAL mt = mapdesc->calcPartialVelocity( mtv, &tmp[0][0][0], trstride, tcstride, pspec[0].order, pspec[1].order, 0, 1, pspec[0].range[2], pspec[1].range[2], 1 );
-		if( ms != 0.0 &&  mt != 0.0 ) {
-			REAL d = 1.0 / (ms * mt);
-			t *= M_SQRT2;
-			REAL ds = t * sqrtf( d * pspec[0].range[2] / pspec[1].range[2] );
-			REAL dt = t * sqrtf( d * pspec[1].range[2] / pspec[0].range[2] );
-			pspec[0].stepsize = ( ds < pspec[0].range[2] ) ? ds : pspec[0].range[2];
-			pspec[0].sidestep[0] = ( msv[0] * pspec[0].range[2] > t ) ? (t / msv[0]) : pspec[0].range[2];
-			pspec[0].sidestep[1] = ( msv[1] * pspec[0].range[2] > t ) ? (t / msv[1]) : pspec[0].range[2];
-	
-			pspec[1].stepsize = ( dt < pspec[1].range[2] ) ? dt : pspec[1].range[2];
-			pspec[1].sidestep[0] = ( mtv[0] * pspec[1].range[2] > t ) ? (t / mtv[0]) : pspec[1].range[2];
-			pspec[1].sidestep[1] = ( mtv[1] * pspec[1].range[2] > t ) ? (t / mtv[1]) : pspec[1].range[2];
-		} else {
-		    pspec[0].singleStep();
-		    pspec[1].singleStep();
-		}
-*/
-	    } else {
-		pspec[0].singleStep();
-		pspec[1].singleStep();
-	    }
-	}
-    }
-
-#ifdef DEBUG
-    _glu_dprintf( "sidesteps %g %g %g %g, stepsize %g %g\n",
-	pspec[0].sidestep[0], pspec[0].sidestep[1],
-	pspec[1].sidestep[0], pspec[1].sidestep[1],
-	pspec[0].stepsize, pspec[1].stepsize );
-#endif
-
-    if( mapdesc->minsavings != N_NOSAVINGSSUBDIVISION ) {
-	REAL savings = 1./(pspec[0].stepsize * pspec[1].stepsize) ;
-	savings-= (2./( pspec[0].sidestep[0] + pspec[0].sidestep[1] )) * 
-		  (2./( pspec[1].sidestep[0] + pspec[1].sidestep[1] ));
-    
-	savings *= pspec[0].range[2] * pspec[1].range[2];
-	if( savings > mapdesc->minsavings ) {
-	    pspec[0].needsSubdivision = pspec[1].needsSubdivision = 1;
-	}
-    }
-
-    if( pspec[0].stepsize < pspec[0].minstepsize )  pspec[0].needsSubdivision =  1;
-    if( pspec[1].stepsize < pspec[1].minstepsize )  pspec[1].needsSubdivision =  1;
-    needsSampling = (needsSampling ? needsSamplingSubdivision() : 0);
-}
-
-void
-Patchspec::singleStep()
-{
-    stepsize =  sidestep[0] =  sidestep[1] = glu_abs(range[2]);
-}
-
-void 
-Patchspec::getstepsize( REAL max ) // max is number of samples for entire patch
-{
-    stepsize = ( max >= 1.0 ) ? range[2] / max : range[2];
-    if (stepsize < 0.0) {
-       stepsize = -stepsize;
-    }
-    sidestep[0]	=  sidestep[1] = minstepsize = stepsize;
-}
-
-int
-Patch::needsSamplingSubdivision( void )
-{
-    return (pspec[0].needsSubdivision || pspec[1].needsSubdivision) ? 1 : 0;
-}
-
-int
-Patch::needsNonSamplingSubdivision( void )
-{
-    return notInBbox;
-}
-
-int
-Patch::needsSubdivision( int param )
-{
-    return pspec[param].needsSubdivision;
-}
-
-int
-Patch::cullCheck( void )
-{
-    if( cullval == CULL_ACCEPT ) 
-	cullval = mapdesc->cullCheck( cpts, pspec[0].order,  pspec[0].stride,
-					    pspec[1].order,  pspec[1].stride );
-    return cullval;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/patch.h b/src/glu/sgi/libnurbs/internals/patch.h
deleted file mode 100644
index 324a25938b4..00000000000
--- a/src/glu/sgi/libnurbs/internals/patch.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * patch.h
- *
- */
-
-#ifndef __glupatch_h_
-#define __glupatch_h_
-
-#include "types.h"
-#include "defines.h"
-
-class Quilt;
-class Mapdesc;
-
-
-struct Pspec {
-    REAL		range[3];
-    REAL		sidestep[2];
-    REAL		stepsize;
-    REAL		minstepsize;
-    int			needsSubdivision;
-};
-
-struct Patchspec : public Pspec {
-    int			order;
-    int			stride;
-    void 		clamp( REAL );
-    void 		getstepsize( REAL );
-    void		singleStep( void );    
-};
-
-class Patch {
-public:
-friend class Subdivider;
-friend class Quilt;
-friend class Patchlist;
-    			Patch( Quilt *, REAL*, REAL *, Patch * );
-    			Patch( Patch &, int, REAL, Patch * );
-    void		bbox( void );
-    void		clamp( void );
-    void		getstepsize( void );
-    int			cullCheck( void );
-    int			needsSubdivision( int );
-    int			needsSamplingSubdivision( void );
-    int			needsNonSamplingSubdivision( void );
-
-    int                 get_uorder() {return pspec[0].order;}
-    int                 get_vorder() {return pspec[1].order;}
-
-private:
-
-    Mapdesc*		mapdesc;
-    Patch*		next;
-    int			cullval;
-    int			notInBbox;
-    int			needsSampling;
-    REAL		cpts[MAXORDER*MAXORDER*MAXCOORDS]; //culling pts 
-    REAL		spts[MAXORDER*MAXORDER*MAXCOORDS]; //sampling pts 
-    REAL		bpts[MAXORDER*MAXORDER*MAXCOORDS]; //bbox pts
-    Patchspec		pspec[2];
-    void 		checkBboxConstraint( void );
-    REAL 		bb[2][MAXCOORDS];
-};
-#endif /* __glupatch_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/patchlist.cc b/src/glu/sgi/libnurbs/internals/patchlist.cc
deleted file mode 100644
index 6a400ab6f72..00000000000
--- a/src/glu/sgi/libnurbs/internals/patchlist.cc
+++ /dev/null
@@ -1,169 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * patchlist.c++
- *
- */
-
-#include <stdio.h>
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "quilt.h"
-#include "patchlist.h"
-#include "patch.h"
-
-Patchlist::Patchlist( Quilt *quilts, REAL *pta, REAL *ptb )
-{
-    patch = 0;
-    for( Quilt *q = quilts; q; q = q->next ) 
-	patch = new Patch( q, pta, ptb, patch );
-    pspec[0].range[0] = pta[0];
-    pspec[0].range[1] = ptb[0];
-    pspec[0].range[2] = ptb[0] - pta[0];
- 
-    pspec[1].range[0] = pta[1];
-    pspec[1].range[1] = ptb[1];
-    pspec[1].range[2] = ptb[1] - pta[1];
-}
-
-Patchlist::Patchlist( Patchlist &upper, int param,  REAL value)
-{
-    Patchlist &lower = *this;
-    patch = 0;
-    for( Patch *p = upper.patch; p; p = p->next )
-	patch = new Patch( *p, param, value, patch );
-
-    if( param == 0 ) {
-	lower.pspec[0].range[0] = upper.pspec[0].range[0];
-	lower.pspec[0].range[1] = value;
-	lower.pspec[0].range[2] = value - upper.pspec[0].range[0];
-	upper.pspec[0].range[0] = value;
-	upper.pspec[0].range[2] = upper.pspec[0].range[1] - value;
-	lower.pspec[1] = upper.pspec[1];
-    } else {
-	lower.pspec[0] = upper.pspec[0];
-	lower.pspec[1].range[0] = upper.pspec[1].range[0];
-	lower.pspec[1].range[1] = value;
-	lower.pspec[1].range[2] = value - upper.pspec[1].range[0];
-	upper.pspec[1].range[0] = value;
-	upper.pspec[1].range[2] = upper.pspec[1].range[1] - value;
-    }
-}
-
-Patchlist::~Patchlist()
-{
-    while( patch ) {
-	Patch *p = patch;
-	patch = patch->next;
-	delete p;
-    }
-}
-
-int
-Patchlist::cullCheck( void )
-{
-    for( Patch *p = patch; p; p = p->next )
-	if( p->cullCheck() == CULL_TRIVIAL_REJECT )
-	    return CULL_TRIVIAL_REJECT;
-    return CULL_ACCEPT;
-}
-
-void
-Patchlist::getRanges(REAL ranges[4])
-{
-  ranges[0] = pspec[0].range[0];
-  ranges[1] = pspec[0].range[1];
-  ranges[2] = pspec[1].range[0];
-  ranges[3] = pspec[1].range[1];
-}
-
-void
-Patchlist::getstepsize( void )
-{
-    pspec[0].stepsize    = pspec[0].range[2];
-    pspec[0].sidestep[0] = pspec[0].range[2];
-    pspec[0].sidestep[1] = pspec[0].range[2];
-
-    pspec[1].stepsize    = pspec[1].range[2];
-    pspec[1].sidestep[0] = pspec[1].range[2];
-    pspec[1].sidestep[1] = pspec[1].range[2];
-
-    for( Patch *p = patch; p; p = p->next ) {
-	p->getstepsize();
-	p->clamp();
-	pspec[0].stepsize    =  ((p->pspec[0].stepsize < pspec[0].stepsize) ? p->pspec[0].stepsize : pspec[0].stepsize);
-	pspec[0].sidestep[0] =  ((p->pspec[0].sidestep[0] < pspec[0].sidestep[0]) ? p->pspec[0].sidestep[0] : pspec[0].sidestep[0]);
-	pspec[0].sidestep[1] =  ((p->pspec[0].sidestep[1] < pspec[0].sidestep[1]) ? p->pspec[0].sidestep[1] : pspec[0].sidestep[1]);
-	pspec[1].stepsize    =  ((p->pspec[1].stepsize < pspec[1].stepsize) ? p->pspec[1].stepsize : pspec[1].stepsize);
-	pspec[1].sidestep[0] =  ((p->pspec[1].sidestep[0] < pspec[1].sidestep[0]) ? p->pspec[1].sidestep[0] : pspec[1].sidestep[0]);
-	pspec[1].sidestep[1] =  ((p->pspec[1].sidestep[1] < pspec[1].sidestep[1]) ? p->pspec[1].sidestep[1] : pspec[1].sidestep[1]);
-    }
-}
-
-void
-Patchlist::bbox( void )
-{
-    for( Patch *p = patch; p; p = p->next )
-	p->bbox();
-}
-
-int
-Patchlist::needsNonSamplingSubdivision( void )
-{
-    notInBbox = 0;
-    for( Patch *p = patch; p; p = p->next )
-	notInBbox |= p->needsNonSamplingSubdivision();
-    return notInBbox;
-}
-
-int
-Patchlist::needsSamplingSubdivision( void )
-{
-    pspec[0].needsSubdivision = 0;
-    pspec[1].needsSubdivision = 0;
-
-    for( Patch *p = patch; p; p = p->next ) {
-	pspec[0].needsSubdivision |= p->pspec[0].needsSubdivision;
-	pspec[1].needsSubdivision |= p->pspec[0].needsSubdivision;
-    }
-    return (pspec[0].needsSubdivision || pspec[1].needsSubdivision) ? 1 : 0;
-}
-
-int
-Patchlist::needsSubdivision( int param )
-{
-    return pspec[param].needsSubdivision;
-}
diff --git a/src/glu/sgi/libnurbs/internals/patchlist.h b/src/glu/sgi/libnurbs/internals/patchlist.h
deleted file mode 100644
index 9bfc5b47a24..00000000000
--- a/src/glu/sgi/libnurbs/internals/patchlist.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * patchlist.h
- *
- */
-
-#ifndef __glupatchlist_h_
-#define __glupatchlist_h_
-
-#include "types.h"
-#include "defines.h"
-#include "patch.h"
-
-class Quilt;
-
-class Patchlist {
-friend class Subdivider;
-public:
-    			Patchlist( Quilt *, REAL *, REAL * );
-    			Patchlist( Patchlist &, int ,  REAL );
-    			~Patchlist();	
-    void		bbox();
-    int			cullCheck( void );
-    void		getstepsize( void );
-    int			needsNonSamplingSubdivision( void );
-    int			needsSamplingSubdivision( void );
-    int			needsSubdivision( int );
-    REAL		getStepsize( int );
-    void                getRanges(REAL ranges[4]);
-
-    int                 get_uorder();
-    int                 get_vorder();
-private:
-    Patch		*patch;
-    int			notInBbox;
-    int			needsSampling;
-    Pspec		pspec[2];
-};
-
-inline REAL
-Patchlist::getStepsize( int param )
-{
-    return pspec[param].stepsize;
-}
-
-inline int
-Patchlist::get_uorder()
-{  
-   return patch->get_uorder();
-
-}
-
-inline int
- Patchlist::get_vorder()
-{ 
-  return patch->get_vorder();
-}
-
-
-
-
-
-#endif /* __glupatchlist_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/pwlarc.h b/src/glu/sgi/libnurbs/internals/pwlarc.h
deleted file mode 100644
index 2e5175a6f33..00000000000
--- a/src/glu/sgi/libnurbs/internals/pwlarc.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * pwlarc.h
- *
- */
-
-#ifndef __glupwlarc_h_
-#define __glupwlarc_h_
-
-#include "myassert.h"
-#include "nurbsconsts.h"
-
-class TrimVertex;
-
-class PwlArc : public PooledObj { /* a piecewise-linear arc */
-public:
-    TrimVertex *	pts;		/* sample points */
-    int			npts;		/* number of sample points */
-    long		type;		/* curve type */
-    inline		PwlArc( void );
-    inline		PwlArc( int, TrimVertex * );
-    inline		PwlArc( int, TrimVertex *, long );
-};
-
-inline
-PwlArc::PwlArc( void )
-{
-    type = N_P2D;
-    pts = 0;
-    npts = -1;
-}
-
-inline
-PwlArc::PwlArc( int _npts, TrimVertex *_pts )
-{
-    pts = _pts;
-    npts = _npts;
-    type = N_P2D;
-}
-
-inline
-PwlArc::PwlArc( int _npts, TrimVertex *_pts, long _type )
-{
-    pts = _pts;
-    npts = _npts;
-    type = _type;
-}
-
-#endif /* __glupwlarc_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/quilt.cc b/src/glu/sgi/libnurbs/internals/quilt.cc
deleted file mode 100644
index d16f4bfec02..00000000000
--- a/src/glu/sgi/libnurbs/internals/quilt.cc
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * quilt.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "quilt.h"
-#include "backend.h"
-#include "mapdesc.h"
-#include "flist.h"
-#include "patchlist.h"
-#include "simplemath.h" //min()
-
-/* local preprocessor definitions */
-#define DEF_PATCH_STEPSIZE	.4
-#define fsizeof(x)		(sizeof(x)/sizeof(REAL))
-
-
-Quilt::Quilt( Mapdesc *_mapdesc )
-{
-    mapdesc = _mapdesc;
-}
- 
-void
-Quilt::deleteMe( Pool& p )
-{
-    for( Quiltspec *q=qspec; q != eqspec; q++ ) {
-#if 1
-	if( q->breakpoints) delete[] q->breakpoints;  q->breakpoints = 0;
-#else
-	if( q->breakpoints) {
-	   delete[] q->breakpoints;  
-	   q->breakpoints = 0;
-printf("in here\n");
-        }
-#endif
-    }
-    if( cpts ) delete[] cpts;  
-    cpts = 0;
-    PooledObj::deleteMe( p );
-}
-
-void
-Quilt::show( void )
-{
-#ifndef NDEBUG
-    int nc = mapdesc->getNcoords();
-    REAL *ps  = cpts; 
-    ps += qspec[0].offset;
-    ps += qspec[1].offset;
-    for( int i=0; i!= qspec[0].order * qspec[0].width; i++ ) {
-	for( int j = 0; j!= qspec[1].order * qspec[1].width; j++ ) {
-	    for( int k=0; k < nc; k++ )
-		_glu_dprintf(  "%g ", ps[i*qspec[0].stride + j*qspec[1].stride + k] );
-	    _glu_dprintf(  "\n" );
-	}
-	_glu_dprintf(  "\n" );
-    }
-    _glu_dprintf( "\n" );
-#endif
-}
-
-/*--------------------------------------------------------------------------
- * Quilt::select - find which map in each quilt contains the points
- *			pta and ptb with pta[i] < ptb[i]
- *--------------------------------------------------------------------------
- */
-
-void
-Quilt::select( REAL *pta, REAL *ptb )
-{
-    int dim = eqspec - qspec; 
-    int i, j;
-    for( i=0; i<dim; i++) {
-	for( j=qspec[i].width-1; j>=0; j-- )
-	    if( (qspec[i].breakpoints[j] <= pta[i]   ) &&
-	    	(ptb[i] <= qspec[i].breakpoints[j+1] ) ) 
-		 break;
-	assert( j != -1 ); 
-	qspec[i].index = j;
-    }
-}
-
-void 
-Quilt::download( Backend &backend )
-{
-    if( getDimension() == 2 ) {
-	REAL *ps  = cpts; 
-	ps += qspec[0].offset;
-	ps += qspec[1].offset;
-	ps += qspec[0].index * qspec[0].order * qspec[0].stride;
-	ps += qspec[1].index * qspec[1].order * qspec[1].stride;
-	backend.surfpts( mapdesc->getType(), ps, 
-		  qspec[0].stride,
-		  qspec[1].stride,
-		  qspec[0].order,
-		  qspec[1].order,
-		  qspec[0].breakpoints[qspec[0].index],
-		  qspec[0].breakpoints[qspec[0].index+1],
-		  qspec[1].breakpoints[qspec[1].index],
-		  qspec[1].breakpoints[qspec[1].index+1] );
-    } else {
-	REAL *ps  = cpts; 
-	ps += qspec[0].offset;
-	ps += qspec[0].index * qspec[0].order * qspec[0].stride;
-	backend.curvpts( mapdesc->getType(), ps, 
-		      qspec[0].stride,
-		      qspec[0].order,
-		      qspec[0].breakpoints[qspec[0].index],
-		      qspec[0].breakpoints[qspec[0].index+1] );
-    }
-}
-
-/*--------------------------------------------------------------------------
- * Quilt::downloadAll - download each map that contains the current patch
- *--------------------------------------------------------------------------
- */
-
-void
-Quilt::downloadAll( REAL *pta, REAL *ptb, Backend &backend )
-{
-    for( Quilt *m = this; m; m=m->next ) {
-	m->select( pta, ptb );
-	m->download( backend );
-    }
-}
-
-/*--------------------------------------------------------------------------
-  * Quilt::isCulled - determine if an entire quilt is trivially rejected.
- *--------------------------------------------------------------------------
- */
-
-int
-Quilt::isCulled( void )
-{
-    if( mapdesc->isCulling() )
-	return mapdesc->xformAndCullCheck( cpts + qspec[0].offset + qspec[1].offset,
-			qspec[0].order * qspec[0].width, qspec[0].stride, 
-			qspec[1].order * qspec[1].width, qspec[1].stride );
-    else
-	return CULL_ACCEPT;
-}
-
-/*---------------------------------------------------------------------------
- * Quilt::getRange - retrieve the valid paramater range of a set of quilts
- *---------------------------------------------------------------------------
- */
-void
-Quilt::getRange( REAL *from, REAL *to, Flist& slist, Flist &tlist )
-{
-    getRange( from, to, 0, slist );
-    getRange( from, to, 1, tlist );
-}
-
-/*---------------------------------------------------------------------------
- * Quilt::getRange - retrieve the valid paramater range of a set of quilts
- *---------------------------------------------------------------------------
- */
-void
-Quilt::getRange( REAL *from, REAL *to, int i, Flist &list )
-{
-    Quilt *maps = this;
-    from[i] = maps->qspec[i].breakpoints[0];
-    to[i]   = maps->qspec[i].breakpoints[maps->qspec[i].width];
-    int maxpts = 0;
-    Quilt_ptr m;    
-    for( m=maps; m; m=m->next ) {
-	if( m->qspec[i].breakpoints[0] > from[i] ) 
-	    from[i] = m->qspec[i].breakpoints[0]; 
-	if( m->qspec[i].breakpoints[m->qspec[i].width] < to[i] ) 
-	    to[i] = m->qspec[i].breakpoints[m->qspec[i].width]; 
-	maxpts += m->qspec[i].width + 1;
-    }
-
-    list.grow( maxpts );
-
-    for( m=maps; m; m=m->next )
-	for( int j=0; j<=m->qspec[i].width; j++ ) {
-	    list.add( m->qspec[i].breakpoints[j] );
-	}
-
-    list.filter( );
-    list.taper( from[i], to[i] );
-}
-
-void
-Quilt::getRange( REAL *from, REAL *to, Flist& slist )
-{
-    getRange( from, to, 0, slist );
-}
-
-void
-Quilt::findRates( Flist& slist, Flist& tlist, REAL rate[2] )
-{
-    findSampleRates( slist, tlist );
-    rate[0] = qspec[0].step_size;
-    rate[1] = qspec[1].step_size;
-
-    for( Quilt *q = next; q; q = q->next ) {
-	q->findSampleRates( slist, tlist );
-	if( q->qspec[0].step_size < rate[0] ) 
-	    rate[0] = q->qspec[0].step_size;
-	if( q->qspec[1].step_size < rate[1] ) 
-	    rate[1] = q->qspec[1].step_size;
-    }
-}
-
-void
-Quilt::findSampleRates( Flist& slist, Flist& tlist )
-{
-    qspec[0].step_size = DEF_PATCH_STEPSIZE * 
-	    (qspec[0].breakpoints[qspec[0].width] - qspec[0].breakpoints[0]); 
-    qspec[1].step_size = DEF_PATCH_STEPSIZE * 
-	    (qspec[1].breakpoints[qspec[1].width] - qspec[1].breakpoints[0]); 
- 
-    for( int i = slist.start; i < slist.end-1; i++ ) {
-	for( int j = tlist.start; j < tlist.end-1; j++ ) {
-
-	    REAL pta[2], ptb[2];
-	    pta[0] = slist.pts[i];
-	    ptb[0] = slist.pts[i+1];
-	    pta[1] = tlist.pts[j];
-	    ptb[1] = tlist.pts[j+1];
-	    Patchlist patchlist( this, pta, ptb );
-	    patchlist.getstepsize();
-	    
-	    {
-	    float edge_len_s = min(glu_abs(ptb[0]-pta[0]),1.0);
-	    float edge_len_t = min(glu_abs(ptb[1]-pta[1]),1.0);
-
-	    if( patchlist.getStepsize(0)/edge_len_s < qspec[0].step_size ) 
-	       qspec[0].step_size = patchlist.getStepsize(0)/edge_len_s;
-	    if( patchlist.getStepsize(1)/edge_len_t < qspec[1].step_size ) 
-	      qspec[1].step_size = patchlist.getStepsize(1)/edge_len_t;
-	    }
-	}
-    }
-}
diff --git a/src/glu/sgi/libnurbs/internals/quilt.h b/src/glu/sgi/libnurbs/internals/quilt.h
deleted file mode 100644
index fe1e3309ead..00000000000
--- a/src/glu/sgi/libnurbs/internals/quilt.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * quilt.h
- *
- */
-
-#ifndef __gluquilt_h_
-#define __gluquilt_h_
-
-#include "defines.h"
-#include "bufpool.h"
-#include "types.h"
-
-class Backend;
-class Mapdesc;
-class Flist;
-struct Knotvector;
-
-/* constants for memory allocation of NURBS to Bezier conversion */ 
-#define	MAXDIM 		2
-
-struct Quiltspec { /* a specification for a dimension of a quilt */
-    int			stride;		/* words between points */
-    int			width;		/* number of segments */
-    int			offset;		/* words to first point */
-    int			order;		/* order */
-    int			index;		/* current segment number */
-    int			bdry[2];	/* boundary edge flag */
-    REAL  		step_size;
-    Knot *		breakpoints;
-};
-
-typedef Quiltspec *Quiltspec_ptr;
-    
-class Quilt : public PooledObj { /* an array of bezier patches */
-public:
-    			Quilt( Mapdesc * );
-    Mapdesc *		mapdesc;	/* map descriptor */
-    REAL *		cpts;		/* control points */
-    Quiltspec		qspec[MAXDIM];	/* the dimensional data */
-    Quiltspec_ptr	eqspec;		/* qspec trailer */
-    Quilt		*next;		/* next quilt in linked list */
-			
-public:
-    void		deleteMe( Pool& );
-    void		toBezier( Knotvector &, INREAL *, long  );
-    void		toBezier( Knotvector &, Knotvector &, INREAL *, long  );
-    void		select( REAL *, REAL * );
-    int			getDimension( void ) { return eqspec - qspec; }
-    void 		download( Backend & );
-    void		downloadAll( REAL *, REAL *, Backend & );
-    int 		isCulled( void );
-    void		getRange( REAL *, REAL *, Flist&, Flist & );
-    void		getRange( REAL *, REAL *, int, Flist & );
-    void		getRange( REAL *, REAL *, Flist&  );
-    void		findRates( Flist& slist, Flist& tlist, REAL[2] );
-    void		findSampleRates( Flist& slist, Flist& tlist );
-    void		show();
-};
-
-typedef class Quilt *Quilt_ptr;
-
-#endif /* __gluquilt_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/reader.cc b/src/glu/sgi/libnurbs/internals/reader.cc
deleted file mode 100644
index c59240d26ab..00000000000
--- a/src/glu/sgi/libnurbs/internals/reader.cc
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- *  reader.c++
- *
- */
-
-#include <stdio.h>
-#include "glimports.h"
-#include "nurbsconsts.h"
-#include "reader.h"
-#include "trimvertex.h"
-#include "simplemath.h"
-
-//when read a pwlCurve, if two consecutive points are the same, then 
-//eliminate one of them. This makes the tessellator more robust. The spec
-//assumes the application makes sure there are no redundant points. 
-//but in Inspector, the trim curves seem to have redundant points a lot.
-//I guess other similar users may have the same problem.
-
-#define ELIMINATE_REDUNDANT_POINTS 
-
-#ifdef  ELIMINATE_REDUNDANT_POINTS 
-#define equal(x,y) ( glu_abs(x-y) <= 0.00001)
-#endif
-
-#ifdef ELIMINATE_REDUNDANT_POINTS 
-O_pwlcurve::O_pwlcurve( long _type, long count, INREAL *array, long byte_stride, TrimVertex *trimpts )
-{
-    next = 0;
-    used = 0;
-    owner = 0;
-    pts = trimpts;
-    npts = (int) count;
-    save = 0;
-    int i;
-
-    /* copy user data into internal trimming data structures */
-    switch( _type ) {
-        case N_P2D: {
-	    TrimVertex *v = pts;
-            TrimVertex *prev = NULL;
-	    int num = 0;
-	    int doit;
-	    for(i=0; i<count; i++) {
-	        doit = 1;
-         	if(prev != NULL)
-		  {
-		    if(equal(prev->param[0], array[0]) && equal(prev->param[1], array[1]))
-		      {
-			doit = 0;
-		      }
-		  }
-		
-		if(doit)
-		  {
-		    v->param[0] = (REAL) array[0];
-		    v->param[1] = (REAL) array[1];
-		    prev = v;
-		    v++;
-                    num++;
-		  }
-		array = (INREAL *) (((char *) array) + byte_stride);
-	      }
-	    npts = num;
-	    break;
-	}
-        case N_P2DR: {
-	    TrimVertex *v = pts;
-    	    for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
-	        v->param[0] = (REAL) array[0] / (REAL) array[2];
-	        v->param[1] = (REAL) array[1] / (REAL) array[2];
-		array = (INREAL *) (((char *) array) + byte_stride);
-	    }
-	    break;
-	}
-    }
-}
-#else
-O_pwlcurve::O_pwlcurve( long _type, long count, INREAL *array, long byte_stride, TrimVertex *trimpts )
-{
-    next = 0;
-    used = 0;
-    owner = 0;
-    pts = trimpts;
-    npts = (int) count;
-    save = 0;
-
-    /* copy user data into internal trimming data structures */
-    switch( _type ) {
-        case N_P2D: {
-	    TrimVertex *v = pts;
-    	    for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
-	        v->param[0] = (REAL) array[0];
-	        v->param[1] = (REAL) array[1];
-		array = (INREAL *) (((char *) array) + byte_stride);
-	    }
-	    break;
-	}
-        case N_P2DR: {
-	    TrimVertex *v = pts;
-    	    for( TrimVertex *lastv = v + count; v != lastv; v++ ) {
-	        v->param[0] = (REAL) array[0] / (REAL) array[2];
-	        v->param[1] = (REAL) array[1] / (REAL) array[2];
-		array = (INREAL *) (((char *) array) + byte_stride);
-	    }
-	    break;
-	}
-    }
-}
-#endif 
-
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/internals/reader.h b/src/glu/sgi/libnurbs/internals/reader.h
deleted file mode 100644
index cae6cada468..00000000000
--- a/src/glu/sgi/libnurbs/internals/reader.h
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * reader.h
- *
- */
-
-#ifndef __glureader_h_
-#define __glureader_h_
-
-#include "bufpool.h"
-#include "types.h"
-
-enum Curvetype { ct_nurbscurve, ct_pwlcurve, ct_none };
-    
-struct Property;
-struct O_surface;
-struct O_nurbssurface;
-struct O_trim;
-class O_pwlcurve;
-struct O_nurbscurve;
-struct O_curve;
-class  Quilt;
-class TrimVertex;
-
-
-struct O_curve : public PooledObj {
-    union {
-        O_nurbscurve	*o_nurbscurve;
-        O_pwlcurve	*o_pwlcurve;
-    } curve;
-    Curvetype		curvetype;	/* arc type: pwl or nurbs	*/
-    O_curve *		next;		/* next arc in loop		*/
-    O_surface *		owner;		/* owning surface		*/
-    int			used;		/* curve called in cur surf	*/
-    int			save;		/* 1 if in display list		*/
-    long		nuid;
-    			O_curve() { next = 0; used = 0; owner = 0; 
-				    curve.o_pwlcurve = 0; curvetype = ct_none; save = 0; nuid = 0; }
-    };
-
-struct O_nurbscurve : public PooledObj {
-    Quilt		*bezier_curves;	/* array of bezier curves	*/
-    long		type;		/* range descriptor		*/
-    REAL		tesselation;	/* tesselation tolerance 	*/
-    int			method;		/* tesselation method 		*/
-    O_nurbscurve *	next;		/* next curve in list		*/
-    int			used;		/* curve called in cur surf	*/
-    int			save;		/* 1 if in display list		*/
-    O_curve *		owner;		/* owning curve 		*/
-			O_nurbscurve( long _type ) 
-			   { bezier_curves = 0; type = _type; tesselation = 0; method = 0; next = 0; used = 0; save = 0; owner = 0; }
-    };
- 
-class O_pwlcurve : public PooledObj {
-public:
-    TrimVertex		*pts;		/* array of trim vertices	*/
-    int			npts;		/* number of trim vertices	*/
-    O_pwlcurve *	next;		/* next curve in list		*/
-    int			used;		/* curve called in cur surf	*/
-    int			save;		/* 1 if in display list		*/
-    O_curve *		owner;		/* owning curve 		*/
-			O_pwlcurve( long, long, INREAL *, long, TrimVertex * );
-    };
-
-struct O_trim : public PooledObj {
-    O_curve		*o_curve;	/* closed trim loop	 	*/
-    O_trim *		next;		/* next loop along trim 	*/
-    int			save;		/* 1 if in display list		*/
-			O_trim() { next = 0; o_curve = 0; save = 0; }
-    };
-
-struct O_nurbssurface : public PooledObj {
-    Quilt *		bezier_patches;/* array of bezier patches	*/
-    long		type;		/* range descriptor		*/
-    O_surface *		owner;		/* owning surface		*/
-    O_nurbssurface *	next;		/* next surface in chain	*/
-    int			save;		/* 1 if in display list		*/
-    int			used;		/* 1 if prev called in block	*/
-			O_nurbssurface( long _type ) 
-			   { bezier_patches = 0; type = _type; owner = 0; next = 0; save = 0; used = 0; }
-    };
-
-struct O_surface : public PooledObj {
-    O_nurbssurface *	o_nurbssurface;	/* linked list of surfaces	*/
-    O_trim *		o_trim;		/* list of trim loops		*/
-    int			save;		/* 1 if in display list		*/
-    long		nuid;
-			O_surface() { o_trim = 0; o_nurbssurface = 0; save = 0; nuid = 0; }
-    };
-
-struct Property : public PooledObj {
-    long		type;
-    long		tag;
-    REAL		value;
-    int			save;		/* 1 if in display list		*/
-			Property( long _type, long _tag, INREAL _value )
-			{ type = _type; tag = _tag; value = (REAL) _value; save = 0; }
-			Property( long _tag, INREAL _value )
-			{ type = 0; tag = _tag; value = (REAL) _value; save = 0; }
-    };
-
-class NurbsTessellator;
-#endif /* __glureader_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/renderhints.cc b/src/glu/sgi/libnurbs/internals/renderhints.cc
deleted file mode 100644
index 4b347ebc7f5..00000000000
--- a/src/glu/sgi/libnurbs/internals/renderhints.cc
+++ /dev/null
@@ -1,136 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * renderhints.c++
- *
- */
-
-#include "glimports.h"
-#include "mystdio.h"
-#include "renderhints.h"
-#include "nurbsconsts.h"
-
-
-/*--------------------------------------------------------------------------
- * Renderhints::Renderhints - set all window specific options
- *--------------------------------------------------------------------------
- */
-Renderhints::Renderhints()
-{
-    display_method 	= N_FILL;
-    errorchecking 	= N_MSG;
-    subdivisions 	= 6.0;
-    tmp1 		= 0.0;
-    displaydomain 	= 0;
-    maxsubdivisions 	= (int) subdivisions;
-    wiretris	 	= 0;
-    wirequads	 	= 0;
-}
-
-void
-Renderhints::init( void )
-{
-    maxsubdivisions = (int) subdivisions;
-    if( maxsubdivisions < 0 ) maxsubdivisions = 0;
-
-
-    if( display_method == N_FILL ) {
-	wiretris = 0;
-	wirequads = 0;
-    } else if( display_method == N_OUTLINE_TRI ) {
-	wiretris = 1;
-	wirequads = 0;
-    } else if( display_method == N_OUTLINE_QUAD ) {
-	wiretris = 0;
-	wirequads = 1;
-    } else {
-	wiretris = 1;
-	wirequads = 1;
-    }
-}
-
-int
-Renderhints::isProperty( long property )
-{
-    switch ( property ) {
-	case N_DISPLAY:
-	case N_ERRORCHECKING:
-	case N_SUBDIVISIONS:
-        case N_TMP1:
-	    return 1;
-	default:
-	    return 0;
-    }
-}
-
-REAL 
-Renderhints::getProperty( long property )
-{
-    switch ( property ) {
-	case N_DISPLAY:
-	    return display_method;
-	case N_ERRORCHECKING:
-	    return errorchecking;
-	case N_SUBDIVISIONS:
-	    return subdivisions;
-        case N_TMP1:
-	    return tmp1;
-	default:
-	    abort();
-	    return -1;  //not necessary, needed to shut up compiler
-    }
-}
-
-void 
-Renderhints::setProperty( long property, REAL value )
-{
-    switch ( property ) {
-	case N_DISPLAY:
-	    display_method = value;
-	    break;
-	case N_ERRORCHECKING:
-	    errorchecking = value;
-	    break;
-	case N_SUBDIVISIONS:
-	    subdivisions = value;
-	    break;
-	case N_TMP1: /* unused */
-	    tmp1 = value;
-	    break;
-	default:
-	    abort();
-	    break;
-    }
-}
diff --git a/src/glu/sgi/libnurbs/internals/renderhints.h b/src/glu/sgi/libnurbs/internals/renderhints.h
deleted file mode 100644
index 444f649be23..00000000000
--- a/src/glu/sgi/libnurbs/internals/renderhints.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * renderhints.h
- *
- */
-
-#ifndef __glurenderhints_h_
-#define __glurenderhints_h_
-
-#include "types.h"
-
-class Renderhints {
-public:
-    			Renderhints( void );
-    void		init( void );
-    int			isProperty( long );
-    REAL 		getProperty( long );
-    void		setProperty( long, REAL );
-
-    REAL 		display_method;		/* display mode */
-    REAL 		errorchecking;		/* activate error checking */
-    REAL 		subdivisions;		/* maximum number of subdivisions per patch */
-    REAL 		tmp1;			/* unused */
-
-    int			displaydomain;
-    int			maxsubdivisions;
-    int			wiretris;
-    int			wirequads;
-};
-
-#endif /* __glurenderhints_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/simplemath.h b/src/glu/sgi/libnurbs/internals/simplemath.h
deleted file mode 100644
index d00062dc700..00000000000
--- a/src/glu/sgi/libnurbs/internals/simplemath.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * simplemath.h
- *
- */
-
-#ifndef __glusimplemath_h_
-#define __glusimplemath_h_
-
-/* simple inline routines */
-
-#include "types.h"
-
-inline int 
-max( int x, int y ) { return ( x < y ) ? y : x; }
-
-inline REAL 
-min( REAL x, REAL y ) { return ( x > y ) ? y : x; }
-
-inline REAL 
-glu_abs( REAL x ) { return ( x < 0.0 ) ? -x : x; }
-
-#endif /* __glusimplemath_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/slicer.cc b/src/glu/sgi/libnurbs/internals/slicer.cc
deleted file mode 100644
index 1b18d73c176..00000000000
--- a/src/glu/sgi/libnurbs/internals/slicer.cc
+++ /dev/null
@@ -1,1304 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * slicer.c++
- *
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <math.h>
-#include "glimports.h"
-#include "mystdio.h"
-#include "myassert.h"
-#include "bufpool.h"
-#include "slicer.h"
-#include "backend.h"
-#include "arc.h"
-#include "gridtrimvertex.h"
-#include "simplemath.h"
-#include "trimvertex.h"
-#include "varray.h"
-
-#include "polyUtil.h" //for area()
-
-//static int count=0;
-
-/*USE_OPTTT is initiated in trimvertex.h*/
-
-#ifdef USE_OPTTT
-	#include <GL/gl.h>
-#endif
-
-//#define USE_READ_FLAG //whether to use new or old tesselator
-                          //if defined, it reads "flagFile", 
-                          // if the number is 1, then use new tess
-                          // otherwise, use the old tess.
-                         //if not defined, then use new tess.
-#ifdef USE_READ_FLAG
-static Int read_flag(char* name);
-Int newtess_flag = read_flag("flagFile");
-#endif
-
-//#define COUNT_TRIANGLES
-#ifdef COUNT_TRIANGLES
-Int num_triangles = 0;
-Int num_quads = 0;
-#endif
-
-#define max(a,b) ((a>b)? a:b)
-#define ZERO 0.00001 /*determing whether a loop is a rectngle or not*/
-#define equalRect(a,b) ((glu_abs(a-b) <= ZERO)? 1:0) //only used in tessellating a rectangle
-
-#if 0 // UNUSED
-static Int is_Convex(Arc_ptr loop)
-{
-  if(area(loop->tail(), loop->head(), loop->next->head()) <0 )
-    return 0;
-  for(Arc_ptr jarc = loop->next; jarc != loop; jarc = jarc->next)
-    {
-      if(area(jarc->tail(), jarc->head(), jarc->next->head()) < 0)
-	return 0;
-    }
-  return 1;
-}
-#endif
-
-/******triangulate a monotone polygon**************/
-#include "monoTriangulation.h"
-#if 0 // UNUSED
-static int is_U_monotone(Arc_ptr loop)
-{
-  int n_changes=0;
-  int prev_sign;
-  int cur_sign;
-  Arc_ptr temp;
-
-  cur_sign = compV2InX(loop->head(), loop->tail());
-
-  n_changes  = (compV2InX(loop->prev->head(), loop->prev->tail())
-		!= cur_sign);
-
-  for(temp=loop->next; temp != loop; temp = temp->next)
-    {
-      prev_sign = cur_sign;
-      cur_sign = compV2InX(temp->head(), temp->tail());
-      if(cur_sign != prev_sign)
-       {
-#ifdef DEBUG
-	 printf("***change signe\n");
-#endif
-	 n_changes++;
-       }
-    }
-  if(n_changes == 2) return 1;
-  else
-    return 0;
-}
-#endif
-
-inline int compInY(REAL a[2], REAL b[2])
-{
-  if(a[1] < b[1])
-    return -1;
-  else if (a[1] > b[1])
-    return 1;
-  else if(a[0] > b[0])
-    return 1;
-  else return -1;
-}
-
-void monoTriangulationLoop(Arc_ptr loop, Backend& backend, primStream* pStream)
-{
-  int i;
-  //find the top, bottom, increasing and decreasing chain
-  //then call monoTrianulation
-  Arc_ptr jarc, temp;
-  Arc_ptr top;
-  Arc_ptr bot;
-  top = bot = loop;
-  if(compInY(loop->tail(), loop->prev->tail()) < 0)
-    {
-      //first find bot
-      for(temp = loop->next; temp != loop; temp = temp->next)
-	{
-	  if(compInY(temp->tail(), temp->prev->tail()) > 0)
-	    break;
-	}
-      bot = temp->prev;
-      //then find top
-      for(temp=loop->prev; temp != loop; temp = temp->prev)
-	{
-	  if(compInY(temp->tail(), temp->prev->tail()) > 0)
-	    break;
-	}
-      top = temp;
-    }
-  else //loop > loop->prev
-    {
-      for(temp=loop->next; temp != loop; temp = temp->next)
-	{
-	  if(compInY(temp->tail(), temp->prev->tail()) < 0)
-	    break;
-	}
-      top = temp->prev;
-      for(temp=loop->prev; temp != loop; temp = temp->prev)
-	{
-	  if(compInY(temp->tail(), temp->prev->tail()) < 0)
-	    break;
-	}
-      bot = temp;
-    }
-  //creat increase and decrease chains
-  vertexArray inc_chain(50); //this is a dynamci array
-  for(i=1; i<=top->pwlArc->npts-2; i++) 
-    {
-      //the first vertex is the top which doesn't below to inc_chain
-      inc_chain.appendVertex(top->pwlArc->pts[i].param);
-    }
-  for(jarc=top->next; jarc != bot; jarc = jarc->next)
-    {
-      for(i=0; i<=jarc->pwlArc->npts-2; i++)
-	{
-	  inc_chain.appendVertex(jarc->pwlArc->pts[i].param);
-	}
-      
-    }
-  vertexArray dec_chain(50);
-  for(jarc = top->prev; jarc != bot; jarc = jarc->prev)
-    {
-      for(i=jarc->pwlArc->npts-2; i>=0; i--)
-	{
-	  dec_chain.appendVertex(jarc->pwlArc->pts[i].param);
-	}
-    }
-  for(i=bot->pwlArc->npts-2; i>=1; i--)
-    {
-      dec_chain.appendVertex(jarc->pwlArc->pts[i].param);
-    }	  
-
-  monoTriangulationRec(top->tail(), bot->tail(), &inc_chain, 0,
-		       &dec_chain, 0, &backend);
-
-}
-
-/********tesselate a rectanlge (OPTIMIZATION**************/
-static void triangulateRectGen(Arc_ptr loop, int n_ulines, int n_vlines, Backend& backend);
-
-static Int is_rect(Arc_ptr loop)
-{
-  Int nlines =1;
-  for(Arc_ptr jarc = loop->next; jarc != loop; jarc = jarc->next)
-    {
-      nlines++;
-      if(nlines == 5)
-	break;
-    }
-  if(nlines != 4)
-    return 0;
-
-
-/*
-printf("here1\n");
-printf("loop->tail=(%f,%f)\n", loop->tail()[0], loop->tail()[1]);
-printf("loop->head=(%f,%f)\n", loop->head()[0], loop->head()[1]);
-printf("loop->next->tail=(%f,%f)\n", loop->next->tail()[0], loop->next->tail()[1]);
-printf("loop->next->head=(%f,%f)\n", loop->next->head()[0], loop->next->head()[1]);
-if(fglu_abs(loop->tail()[0] - loop->head()[0])<0.000001)
-	printf("equal 1\n");
-if(loop->next->tail()[1] == loop->next->head()[1])
-	printf("equal 2\n");
-*/
-
-  if( (glu_abs(loop->tail()[0] - loop->head()[0])<=ZERO) && 
-      (glu_abs(loop->next->tail()[1] - loop->next->head()[1])<=ZERO) &&
-      (glu_abs(loop->prev->tail()[1] - loop->prev->head()[1])<=ZERO) &&
-      (glu_abs(loop->prev->prev->tail()[0] - loop->prev->prev->head()[0])<=ZERO)
-     )
-    return 1;
-  else if
-    ( (glu_abs(loop->tail()[1] - loop->head()[1]) <= ZERO) && 
-      (glu_abs(loop->next->tail()[0] - loop->next->head()[0]) <= ZERO) &&
-      (glu_abs(loop->prev->tail()[0] - loop->prev->head()[0]) <= ZERO) &&
-      (glu_abs(loop->prev->prev->tail()[1] - loop->prev->prev->head()[1]) <= ZERO)
-     )
-      return 1;
-  else
-    return 0;
-}
-
-
-//a line with the same u for opt
-#ifdef USE_OPTTT
-static void evalLineNOGE_BU(TrimVertex *verts, int n, Backend& backend)
-{
-  int i;
-  backend.preEvaluateBU(verts[0].param[0]);
-  for(i=0; i<n; i++)
-    backend.tmeshvertNOGE_BU(&verts[i]);
-}
-#endif
-
-//a line with the same v for opt
-#ifdef USE_OPTTT
-static void evalLineNOGE_BV(TrimVertex *verts, int n, Backend& backend)
-{
-  int i;
-  backend.preEvaluateBV(verts[0].param[1]);
-
-  for(i=0; i<n; i++)
-    backend.tmeshvertNOGE_BV(&verts[i]);
-}
-#endif
-
-#ifdef USE_OPTTT
-static void evalLineNOGE(TrimVertex *verts, int n, Backend& backend)
-{
-
-  if(verts[0].param[0] == verts[n-1].param[0]) //all u;s are equal
-    evalLineNOGE_BU(verts, n, backend);
-  else if(verts[0].param[1] == verts[n-1].param[1]) //all v's are equal
-    evalLineNOGE_BV(verts, n, backend);
-  else
-    {
-      int i;
-      for(i=0; i<n; i++)
-	backend.tmeshvertNOGE(&verts[i]);
-    }
-}
-#endif
-
-inline void  OPT_OUTVERT(TrimVertex& vv, Backend& backend) 
-{
-
-#ifdef USE_OPTTT
-  glNormal3fv(vv.cache_normal);                         
-  glVertex3fv(vv.cache_point);
-#else
-
-  backend.tmeshvert(&vv);
-
-#endif
-
-}
-
-static void triangulateRectAux(PwlArc* top, PwlArc* bot, PwlArc* left, PwlArc* right, Backend& backend);
-
-static void triangulateRect(Arc_ptr loop, Backend& backend, int TB_or_LR, int ulinear, int vlinear)
-{
-  //we know the loop is a rectangle, but not sure which is top
-  Arc_ptr top, bot, left, right;
-  if(loop->tail()[1] == loop->head()[1])
-    {
-      if(loop->tail()[1] > loop->prev->prev->tail()[1])
-	{
-
-	top = loop;
-	}
-      else{
-
-	top = loop->prev->prev;
-	}
-    }
-  else 
-    {
-      if(loop->tail()[0] > loop->prev->prev->tail()[0])
-	{
-	  //loop is the right arc
-
-	  top = loop->next;
-	}
-      else
-	{
-
-	  top = loop->prev;
-	}
-    }
-  left = top->next;
-  bot  = left->next;
-  right= bot->next;
-
-  //if u, v are both nonlinear, then if the
-  //boundary is tessellated dense, we also
-  //sample the inside to get a better tesslletant.
-  if( (!ulinear) && (!vlinear))
-    {
-      int nu = top->pwlArc->npts;
-      if(nu < bot->pwlArc->npts)
-	nu = bot->pwlArc->npts;
-      int nv = left->pwlArc->npts;
-      if(nv < right->pwlArc->npts)
-	nv = right->pwlArc->npts;
-/*
-      if(nu > 2 && nv > 2)
-	{
-	  triangulateRectGen(top, nu-2,  nv-2, backend);
-	  return;
-	}
-*/
-    }
-
-  if(TB_or_LR == 1)
-    triangulateRectAux(top->pwlArc, bot->pwlArc, left->pwlArc, right->pwlArc, backend);
-  else if(TB_or_LR == -1)
-    triangulateRectAux(left->pwlArc, right->pwlArc, bot->pwlArc, top->pwlArc, backend);    
-  else
-    {
-      Int maxPointsTB = top->pwlArc->npts + bot->pwlArc->npts;
-      Int maxPointsLR = left->pwlArc->npts + right->pwlArc->npts;
-      
-      if(maxPointsTB < maxPointsLR)
-	triangulateRectAux(left->pwlArc, right->pwlArc, bot->pwlArc, top->pwlArc, backend);    
-      else
-	triangulateRectAux(top->pwlArc, bot->pwlArc, left->pwlArc, right->pwlArc, backend);
-    }
-}
-
-static void triangulateRectAux(PwlArc* top, PwlArc* bot, PwlArc* left, PwlArc* right, Backend& backend)
-{ //if(maxPointsTB >= maxPointsLR)
-    {
-
-      Int d, topd_left, topd_right, botd_left, botd_right, i,j;
-      d = left->npts /2;
-
-#ifdef USE_OPTTT
-      evalLineNOGE(top->pts, top->npts, backend);
-      evalLineNOGE(bot->pts, bot->npts, backend);
-      evalLineNOGE(left->pts, left->npts, backend);
-      evalLineNOGE(right->pts, right->npts, backend);
-#endif
-
-      if(top->npts == 2) {
-	backend.bgntfan();
-	OPT_OUTVERT(top->pts[0], backend);//the root
-	for(i=0; i<left->npts; i++){
-	  OPT_OUTVERT(left->pts[i], backend);
-	}
-	for(i=1; i<= bot->npts-2; i++){
-	  OPT_OUTVERT(bot->pts[i], backend);
-	}
-	backend.endtfan();
-	
-	backend.bgntfan();
-	OPT_OUTVERT(bot->pts[bot->npts-2], backend);
-	for(i=0; i<right->npts; i++){
-	  OPT_OUTVERT(right->pts[i], backend);
-	}
-	backend.endtfan();
-      }
-      else if(bot->npts == 2) {
-	backend.bgntfan();
-	OPT_OUTVERT(bot->pts[0], backend);//the root
-	for(i=0; i<right->npts; i++){
-	  OPT_OUTVERT(right->pts[i], backend);
-	}
-	for(i=1; i<= top->npts-2; i++){
-	  OPT_OUTVERT(top->pts[i], backend);
-	}
-	backend.endtfan();
-	
-	backend.bgntfan();
-	OPT_OUTVERT(top->pts[top->npts-2], backend);
-	for(i=0; i<left->npts; i++){
-	  OPT_OUTVERT(left->pts[i], backend);
-	}
-	backend.endtfan();
-      }
-      else { //both top and bot have >=3 points
-	
-	backend.bgntfan();
-	
-	OPT_OUTVERT(top->pts[top->npts-2], backend);
-	
-	for(i=0; i<=d; i++)
-	  {
-	    OPT_OUTVERT(left->pts[i], backend);	  
-	  }
-	backend.endtfan();
-	
-	backend.bgntfan();
-	
-	OPT_OUTVERT(bot->pts[1], backend);
-	
-	OPT_OUTVERT(top->pts[top->npts-2], backend);
-	
-	for(i=d; i< left->npts; i++)
-	  {      
-	    OPT_OUTVERT(left->pts[i], backend);      
-	  }
-	backend.endtfan();
-
-	d = right->npts/2;
-	//output only when d<right->npts-1 and
-	//
-	if(d<right->npts-1)
-	  {	
-	    backend.bgntfan();
-	    //      backend.tmeshvert(& top->pts[1]);
-	    OPT_OUTVERT(top->pts[1], backend);
-	    for(i=d; i< right->npts; i++)
-	      {
-		//	  backend.tmeshvert(& right->pts[i]);
-		
-		OPT_OUTVERT(right->pts[i], backend);
-		
-	      }
-	    backend.endtfan();
-	  }
-	
-	backend.bgntfan();
-	//      backend.tmeshvert(& bot->pts[bot->npts-2]);
-	OPT_OUTVERT( bot->pts[bot->npts-2], backend);
-	for(i=0; i<=d; i++)
-	  {
-	    //	  backend.tmeshvert(& right->pts[i]);
-	    OPT_OUTVERT(right->pts[i], backend);
-	    
-	  }
-	
-	//      backend.tmeshvert(& top->pts[1]);
-	OPT_OUTVERT(top->pts[1], backend);      
-	
-	backend.endtfan();
-
-
-	topd_left = top->npts-2;
-	topd_right = 1; //topd_left>= topd_right
-
-	botd_left = 1;
-	botd_right = bot->npts-2; //botd_left<= bot_dright
-
-	
-	if(top->npts < bot->npts)
-	  {
-	    int delta=bot->npts - top->npts;
-	    int u = delta/2;
-	    botd_left = 1+ u;
-	    botd_right = bot->npts-2-( delta-u);	    
-	
-	    if(botd_left >1)
-	      {
-		backend.bgntfan();
-		//	  backend.tmeshvert(& top->pts[top->npts-2]);
-		OPT_OUTVERT(top->pts[top->npts-2], backend);
-		for(i=1; i<= botd_left; i++)
-		  {
-		    //	      backend.tmeshvert(& bot->pts[i]);
-		    OPT_OUTVERT(bot->pts[i] , backend);
-		  }
-		backend.endtfan();
-	      }
-	    if(botd_right < bot->npts-2)
-	      {
-		backend.bgntfan();
-		OPT_OUTVERT(top->pts[1], backend);
-		for(i=botd_right; i<= bot->npts-2; i++)
-		  OPT_OUTVERT(bot->pts[i], backend);
-		backend.endtfan();
-	      }
-	  }
-	else if(top->npts> bot->npts)
-	  {
-	    int delta=top->npts-bot->npts;
-	    int u = delta/2;
-	    topd_left = top->npts-2 - u;
-	    topd_right = 1+delta-u;
-	    
-	    if(topd_left < top->npts-2)
-	      {
-		backend.bgntfan();
-		//	  backend.tmeshvert(& bot->pts[1]);
-		OPT_OUTVERT(bot->pts[1], backend);
-		for(i=topd_left; i<= top->npts-2; i++)
-		  {
-		    //	      backend.tmeshvert(& top->pts[i]);
-		    OPT_OUTVERT(top->pts[i], backend);
-		  }
-		backend.endtfan();
-	      }
-	    if(topd_right > 1)
-	      {
-		backend.bgntfan();
-		OPT_OUTVERT(bot->pts[bot->npts-2], backend);
-		for(i=1; i<= topd_right; i++)
-		  OPT_OUTVERT(top->pts[i], backend);
-		backend.endtfan();
-	      }
-	  }
-	
-	if(topd_left <= topd_right) 
-	  return;
-
-	backend.bgnqstrip();
-	for(j=botd_left, i=topd_left; i>=topd_right; i--,j++)
-	  {
-	    //	  backend.tmeshvert(& top->pts[i]);
-	    //	  backend.tmeshvert(& bot->pts[j]);
-	    OPT_OUTVERT(top->pts[i], backend);
-	    OPT_OUTVERT(bot->pts[j], backend);
-	  }
-	backend.endqstrip();
-	
-      }
-    }
-}
-
-  
-static void triangulateRectCenter(int n_ulines, REAL* u_val, 
-				  int n_vlines, REAL* v_val,
-				  Backend& backend)
-{
-
-  // XXX this code was patched by Diego Santa Cruz <[email protected]>
-  // to fix a problem in which glMapGrid2f() was called with bad parameters.
-  // This has beens submitted to SGI but not integrated as of May 1, 2001.
-  if(n_ulines>1 && n_vlines>1) {
-    backend.surfgrid(u_val[0], u_val[n_ulines-1], n_ulines-1, 
-                     v_val[n_vlines-1], v_val[0], n_vlines-1);
-    backend.surfmesh(0,0,n_ulines-1,n_vlines-1);
-  }
-
-  return;
-
-  /*
-  for(i=0; i<n_vlines-1; i++)
-    {
-
-      backend.bgnqstrip();
-      for(j=0; j<n_ulines; j++)
-	{
-	  trimVert.param[0] = u_val[j];
-	  trimVert.param[1] = v_val[i+1];
-	  backend.tmeshvert(& trimVert);	  
-
-	  trimVert.param[1] = v_val[i];
-	  backend.tmeshvert(& trimVert);	  
-	}
-      backend.endqstrip();
-
-    }
-    */
-}
-
-//it works for top, bot, left ad right, you need ot select correct arguments
-static void triangulateRectTopGen(Arc_ptr arc, int n_ulines, REAL* u_val, Real v, int dir, int is_u, Backend& backend)
-{
-
-  if(is_u)
-    {
-      int i,k;
-      REAL* upper_val = (REAL*) malloc(sizeof(REAL) * arc->pwlArc->npts);
-      assert(upper_val);
-      if(dir)
-	{
-	  for(k=0,i=arc->pwlArc->npts-1; i>=0; i--,k++)
-	    {
-	      upper_val[k] = arc->pwlArc->pts[i].param[0];
-	    }	
-	  backend.evalUStrip(arc->pwlArc->npts, arc->pwlArc->pts[0].param[1],
-			     upper_val,
-			     n_ulines, v, u_val);
-	}
-      else
-	{
-	  for(k=0,i=0;  i<arc->pwlArc->npts; i++,k++)
-	    {
-	      upper_val[k] = arc->pwlArc->pts[i].param[0];
-
-	    }		  
-
-	  backend.evalUStrip(
-			     n_ulines, v, u_val,
-			     arc->pwlArc->npts, arc->pwlArc->pts[0].param[1], upper_val
-			     );	 
-	}
-
-      free(upper_val);
-      return;
-    }
-  else //is_v
-    {
-      int i,k;
-      REAL* left_val = (REAL*) malloc(sizeof(REAL) * arc->pwlArc->npts);
-      assert(left_val);   
-      if(dir)
-	{
-	  for(k=0,i=arc->pwlArc->npts-1; i>=0; i--,k++)
-	    {
-	      left_val[k] = arc->pwlArc->pts[i].param[1];
-	    }
-	  backend.evalVStrip(arc->pwlArc->npts, arc->pwlArc->pts[0].param[0],
-			     left_val,
-			     n_ulines, v, u_val);
-	}
-      else 
-	{
-	  for(k=0,i=0;  i<arc->pwlArc->npts; i++,k++)
-	    {
-	      left_val[k] = arc->pwlArc->pts[i].param[1];
-	    }
-	   backend.evalVStrip(
-			     n_ulines, v, u_val,
-			     arc->pwlArc->npts, arc->pwlArc->pts[0].param[0], left_val
-			     );	
-	}
-      free(left_val);
-      return;
-    }
-	
-  //the following is a different version of the above code. If you comment
-  //the above code, the following code will still work. The reason to leave
-  //the folliwng code here is purely for testing purpose.
-  /*
-  int i,j;
-  PwlArc* parc = arc->pwlArc;
-  int d1 = parc->npts-1;
-  int d2 = 0;
-  TrimVertex trimVert;
-  trimVert.nuid = 0;//????
-  REAL* temp_u_val = u_val;
-  if(dir ==0) //have to reverse u_val
-    {
-      temp_u_val = (REAL*) malloc(sizeof(REAL) * n_ulines);
-      assert(temp_u_val);
-      for(i=0; i<n_ulines; i++)
-	temp_u_val[i] = u_val[n_ulines-1-i];
-    }
-  u_val = temp_u_val;
-
-  if(parc->npts > n_ulines)
-    {
-      d1 = n_ulines-1;
-
-      backend.bgntfan();
-      if(is_u){
-	trimVert.param[0] = u_val[0];
-	trimVert.param[1] = v;
-      }
-      else
-	{
-	trimVert.param[1] = u_val[0];
-	trimVert.param[0] = v;
-      }
-	  
-      backend.tmeshvert(& trimVert);
-      for(i=d1; i< parc->npts; i++)
-	backend.tmeshvert(& parc->pts[i]);
-      backend.endtfan();
-
-
-    }
-  else if(parc->npts < n_ulines)
-    {
-      d2 = n_ulines-parc->npts;
-
-
-      backend.bgntfan();
-      backend.tmeshvert(& parc->pts[parc->npts-1]);
-      for(i=0; i<= d2; i++)
-	{
-	  if(is_u){
-	    trimVert.param[0] = u_val[i];
-	    trimVert.param[1] = v;
-	  }
-	  else
-	    {
-	      trimVert.param[1] = u_val[i];
-	      trimVert.param[0] = v;
-	    }
-	  backend.tmeshvert(&trimVert);
-	}
-      backend.endtfan();
-
-    }
-  if(d1>0){
-
-
-    backend.bgnqstrip();
-    for(i=d1, j=d2; i>=0; i--, j++)
-      {
-	backend.tmeshvert(& parc->pts[i]);
-
-	if(is_u){
-	  trimVert.param[0] = u_val[j];
-	  trimVert.param[1] = v;
-	}
-	else{
-	  trimVert.param[1] = u_val[j];
-	  trimVert.param[0] = v;
-	}
-	backend.tmeshvert(&trimVert);
-
-
-	
-      }
-    backend.endqstrip();
-
-
-  }
-  if(dir == 0)  //temp_u_val was mallocated
-    free(temp_u_val);
- */
-}
-
-//n_ulines is the number of ulines inside, and n_vlines is the number of vlines
-//inside, different from meanings elsewhere!!!
-static void triangulateRectGen(Arc_ptr loop, int n_ulines, int n_vlines, Backend& backend)
-{
-
-  int i;
-  //we know the loop is a rectangle, but not sure which is top
-  Arc_ptr top, bot, left, right;
-
-  if(equalRect(loop->tail()[1] ,  loop->head()[1]))
-    {
-
-      if(loop->tail()[1] > loop->prev->prev->tail()[1])
-	{
-
-	top = loop;
-	}
-      else{
-
-	top = loop->prev->prev;
-	}
-    }
-  else 
-    {
-      if(loop->tail()[0] > loop->prev->prev->tail()[0])
-	{
-	  //loop is the right arc
-
-	  top = loop->next;
-	}
-      else
-	{
-
-	  top = loop->prev;
-	}
-    }
-
-  left = top->next;
-  bot  = left->next;
-  right= bot->next;
-
-#ifdef COUNT_TRIANGLES
-  num_triangles += loop->pwlArc->npts + 
-                 left->pwlArc->npts + 
-                 bot->pwlArc->npts + 
-		  right->pwlArc->npts 
-		      + 2*n_ulines + 2*n_vlines 
-			-8;
-  num_quads += (n_ulines-1)*(n_vlines-1);
-#endif
-/*
-  backend.surfgrid(left->tail()[0], right->tail()[0], n_ulines+1, 
-		   top->tail()[1], bot->tail()[1], n_vlines+1);
-//  if(n_ulines>1 && n_vlines>1)
-    backend.surfmesh(0,0,n_ulines+1,n_vlines+1);
-return;
-*/
-  REAL* u_val=(REAL*) malloc(sizeof(REAL)*n_ulines);
-  assert(u_val);
-  REAL* v_val=(REAL*)malloc(sizeof(REAL) * n_vlines);
-  assert(v_val);
-  REAL u_stepsize = (right->tail()[0] - left->tail()[0])/( (REAL) n_ulines+1);
-  REAL v_stepsize = (top->tail()[1] - bot->tail()[1])/( (REAL) n_vlines+1);
-  Real temp=left->tail()[0]+u_stepsize;
-  for(i=0; i<n_ulines; i++)
-    {
-      u_val[i] = temp;
-      temp += u_stepsize;
-    }
-  temp = bot->tail()[1] + v_stepsize;
-  for(i=0; i<n_vlines; i++)
-    {
-      v_val[i] = temp;
-      temp += v_stepsize;
-    }
-
-  triangulateRectTopGen(top, n_ulines, u_val, v_val[n_vlines-1], 1,1, backend);
-  triangulateRectTopGen(bot, n_ulines, u_val, v_val[0], 0, 1, backend);
-  triangulateRectTopGen(left, n_vlines, v_val, u_val[0], 1, 0, backend);
-  triangulateRectTopGen(right, n_vlines, v_val, u_val[n_ulines-1], 0,0, backend);
-
-
-
-
-  //triangulate the center
-  triangulateRectCenter(n_ulines, u_val, n_vlines, v_val, backend);
-
-  free(u_val);
-  free(v_val);
-  
-}
-
-
-  
-
-/**********for reading newtess_flag from a file**********/
-#ifdef USE_READ_FLAG
-static Int read_flag(char* name)
-{
-  Int ret;
-  FILE* fp = fopen(name, "r");
-  if(fp == NULL)
-    {
-      fprintf(stderr, "can't open file %s\n", name);
-      exit(1);
-    }
-  fscanf(fp, "%i", &ret);
-  fclose(fp);
-  return ret;
-}
-#endif  
-
-/***********nextgen tess****************/
-#include "sampleMonoPoly.h"
-directedLine* arcToDLine(Arc_ptr arc)
-{
-  int i;
-  Real vert[2];
-  directedLine* ret;
-  sampledLine* sline = new sampledLine(arc->pwlArc->npts);
-  for(i=0; i<arc->pwlArc->npts; i++)
-    {
-      vert[0] = arc->pwlArc->pts[i].param[0];
-      vert[1] = arc->pwlArc->pts[i].param[1];
-      sline->setPoint(i, vert);
-    }
-  ret = new directedLine(INCREASING, sline);
-  return ret;
-}
- 
-/*an pwlArc may not be a straight line*/
-directedLine* arcToMultDLines(directedLine* original, Arc_ptr arc)
-{
-  directedLine* ret = original;
-  int is_linear = 0;
-  if(arc->pwlArc->npts == 2 )
-    is_linear = 1;
-  else if(area(arc->pwlArc->pts[0].param, arc->pwlArc->pts[1].param, arc->pwlArc->pts[arc->pwlArc->npts-1].param) == 0.0)
-    is_linear = 1;
-  
-  if(is_linear)
-    {
-      directedLine *dline = arcToDLine(arc);
-      if(ret == NULL)
-	ret = dline;
-      else
-	ret->insert(dline);
-      return ret;
-    }
-  else /*not linear*/
-    {
-      for(Int i=0; i<arc->pwlArc->npts-1; i++)
-	{
-	  Real vert[2][2];
-	  vert[0][0] = arc->pwlArc->pts[i].param[0];
-	  vert[0][1] = arc->pwlArc->pts[i].param[1];
-	  vert[1][0] = arc->pwlArc->pts[i+1].param[0];
-	  vert[1][1] = arc->pwlArc->pts[i+1].param[1];
-	  
-	  sampledLine *sline = new sampledLine(2, vert);
-	  directedLine *dline = new directedLine(INCREASING, sline);
-	  if(ret == NULL)
-	    ret = dline;
-	  else
-	    ret->insert(dline);
-	}
-      return ret;
-    }
-}
-  
-     
-	
-directedLine* arcLoopToDLineLoop(Arc_ptr loop)
-{
-  directedLine* ret;
-
-  if(loop == NULL)
-    return NULL;
-  ret = arcToMultDLines(NULL, loop);
-//ret->printSingle();
-  for(Arc_ptr temp = loop->next; temp != loop; temp = temp->next){
-    ret = arcToMultDLines(ret, temp);
-//ret->printSingle();
-  }
-
-  return ret;
-}
-
-/*
-void Slicer::evalRBArray(rectBlockArray* rbArray, gridWrap* grid)
-{
-  TrimVertex *trimVert = (TrimVertex*)malloc(sizeof(TrimVertex));
-  trimVert -> nuid = 0;//????
-
-  Real* u_values = grid->get_u_values();
-  Real* v_values = grid->get_v_values();
-
-  Int i,j,k,l;
-
-  for(l=0; l<rbArray->get_n_elements(); l++)
-    {
-      rectBlock* block = rbArray->get_element(l);
-      for(k=0, i=block->get_upGridLineIndex(); i>block->get_lowGridLineIndex(); i--, k++)
-	{
-
-	  backend.bgnqstrip();
-	  for(j=block->get_leftIndices()[k+1]; j<= block->get_rightIndices()[k+1]; j++)
-	    {
-	      trimVert->param[0] = u_values[j];
-	      trimVert->param[1] = v_values[i];
-	      backend.tmeshvert(trimVert);
-
-	      trimVert->param[1] = v_values[i-1];
-	      backend.tmeshvert(trimVert);
-
-	    }
-	  backend.endqstrip();
-
-	}
-    }
-  
-  free(trimVert);
-}
-*/
-
-void Slicer::evalRBArray(rectBlockArray* rbArray, gridWrap* grid)
-{
-  Int i,j,k;
-  
-  Int n_vlines=grid->get_n_vlines();
-  //the reason to switch the position of v_max and v_min is because of the
-  //the orientation problem. glEvalMesh generates quad_strip clockwise, but
-  //we need counter-clockwise.
-  backend.surfgrid(grid->get_u_min(), grid->get_u_max(), grid->get_n_ulines()-1,
-		   grid->get_v_max(), grid->get_v_min(), n_vlines-1);
-
-
-  for(j=0; j<rbArray->get_n_elements(); j++)
-    {
-      rectBlock* block = rbArray->get_element(j);
-      Int low = block->get_lowGridLineIndex();
-      Int high = block->get_upGridLineIndex();
-
-      for(k=0, i=high; i>low; i--, k++)
-	{
-	  backend.surfmesh(block->get_leftIndices()[k+1], n_vlines-1-i, block->get_rightIndices()[k+1]-block->get_leftIndices()[k+1], 1);
-	}
-    }
-}
-
-
-void Slicer::evalStream(primStream* pStream)
-{
-  Int i,j,k;
-  k=0;
-/*  TrimVertex X;*/
-  TrimVertex *trimVert =/*&X*/  (TrimVertex*)malloc(sizeof(TrimVertex));
-  trimVert -> nuid = 0;//???
-  Real* vertices = pStream->get_vertices(); //for efficiency
-  for(i=0; i<pStream->get_n_prims(); i++)
-    {
-
-     //ith primitive  has #vertices = lengths[i], type=types[i]
-      switch(pStream->get_type(i)){
-      case PRIMITIVE_STREAM_FAN:
-
-	backend.bgntfan();
-
-	for(j=0; j<pStream->get_length(i); j++)
-	  {	    
-	    trimVert->param[0] = vertices[k];
-	    trimVert->param[1] = vertices[k+1];
-	    backend.tmeshvert(trimVert);	   
-	    
-//	    backend.tmeshvert(vertices[k], vertices[k+1]);
-	    k += 2;
-	  }
-	backend.endtfan();
-	break;
-	
-      default:
-	fprintf(stderr, "evalStream: not implemented yet\n");
-	exit(1);
-
-      }
-    }
-  free(trimVert);
-}
-	   
-	   
-	    
-
-void Slicer::slice_new(Arc_ptr loop)
-{
-//count++;
-//if(count == 78) count=1;
-//printf("count=%i\n", count);
-//if( ! (4<= count && count <=4)) return;
-
-
-  Int num_ulines;
-  Int num_vlines;
-  Real uMin, uMax, vMin, vMax;
-  Real mydu, mydv;
-  uMin = uMax = loop->tail()[0];
-  vMin = vMax = loop->tail()[1];
-  mydu = (du>0)? du: -du;
-  mydv = (dv>0)? dv: -dv;
-
-  for(Arc_ptr jarc=loop->next; jarc != loop; jarc = jarc->next)
-   {
-
-     if(jarc->tail()[0] < uMin)
-       uMin = jarc->tail()[0];
-     if(jarc->tail()[0] > uMax)
-       uMax = jarc->tail()[0];
-     if(jarc->tail()[1] < vMin)
-       vMin = jarc->tail()[1];
-     if(jarc->tail()[1] > vMax)
-       vMax = jarc->tail()[1];
-   }
-
-  if (uMax == uMin)
-    return; // prevent divide-by-zero.  Jon Perry.  17 June 2002
-
-  if(mydu > uMax - uMin)
-    num_ulines = 2;
-  else
-    {
-      num_ulines = 3 + (Int) ((uMax-uMin)/mydu);
-    }
-  if(mydv>=vMax-vMin)
-    num_vlines = 2;
-  else
-    {
-      num_vlines = 2+(Int)((vMax-vMin)/mydv);
-    }
-
-  Int isRect = is_rect(loop);
-
-  if(isRect && (num_ulines<=2 || num_vlines<=2))
-    {
-      if(vlinear)
-	triangulateRect(loop, backend, 1, ulinear, vlinear);
-      else if(ulinear)
-	triangulateRect(loop, backend, -1, ulinear, vlinear);	
-      else
-	triangulateRect(loop, backend, 0, ulinear, vlinear);		
-    }
-
-   else if(isRect)
-    {
-      triangulateRectGen(loop, num_ulines-2, num_vlines-2, backend); 
-    }
-  else if( (num_ulines<=2 || num_vlines <=2) && ulinear)
-    {
-      monoTriangulationFunBackend(loop, compV2InY, &backend);
-    }
-  else if( (!ulinear) && (!vlinear) && (num_ulines == 2) && (num_vlines > 2))
-    {
-      monoTriangulationFunBackend(loop, compV2InY, &backend);
-    }
-  else 
-    {
-      directedLine* poly = arcLoopToDLineLoop(loop);
-
-      gridWrap grid(num_ulines, num_vlines, uMin, uMax, vMin, vMax);
-      primStream pStream(20, 20);
-      rectBlockArray rbArray(20);
-
-      sampleMonoPoly(poly, &grid, ulinear, vlinear, &pStream, &rbArray);
-
-      evalStream(&pStream);
-
-      evalRBArray(&rbArray, &grid);
-      
-#ifdef COUNT_TRIANGLES
-      num_triangles += pStream.num_triangles();
-      num_quads += rbArray.num_quads();
-#endif
-      poly->deleteSinglePolygonWithSline();      
-    }
-  
-#ifdef COUNT_TRIANGLES
-  printf("num_triangles=%i\n", num_triangles);
-  printf("num_quads = %i\n", num_quads);
-#endif
-}
-
-void Slicer::slice(Arc_ptr loop)
-{
-#ifdef USE_READ_FLAG
-  if(read_flag("flagFile"))
-    slice_new(loop);
-  else
-    slice_old(loop);
-
-#else
-    slice_new(loop);
-#endif
-
-}
-
-  
-
-Slicer::Slicer( Backend &b ) 
-	: CoveAndTiler( b ), Mesher( b ), backend( b )
-{
-    oneOverDu = 0;
-    du = 0;
-    dv = 0;
-    isolines = 0;
-    ulinear = 0;
-    vlinear = 0;
-}
-
-Slicer::~Slicer()
-{
-}
-
-void
-Slicer::setisolines( int x )
-{
-    isolines = x;
-}
-
-void
-Slicer::setstriptessellation( REAL x, REAL y )
-{
-    assert(x > 0 && y > 0);
-    du = x;
-    dv = y;
-    setDu( du );
-}
-
-void
-Slicer::slice_old( Arc_ptr loop )
-{
-    loop->markverts();
-
-    Arc_ptr extrema[4];
-    loop->getextrema( extrema );
-
-    unsigned int npts = loop->numpts();
-    TrimRegion::init( npts, extrema[0] );
-
-    Mesher::init( npts );
-
-    long ulines = uarray.init( du, extrema[1], extrema[3] );
-//printf("ulines = %i\n", ulines);
-    Varray varray;
-    long vlines = varray.init( dv, extrema[0], extrema[2] );
-//printf("vlines = %i\n", vlines);
-    long botv = 0;
-    long topv;
-    TrimRegion::init( varray.varray[botv] );
-    getGridExtent( &extrema[0]->pwlArc->pts[0], &extrema[0]->pwlArc->pts[0] );
-
-    for( long quad=0; quad<varray.numquads; quad++ ) {
-	backend.surfgrid( uarray.uarray[0], 
-		       uarray.uarray[ulines-1], 
-	 	       ulines-1, 
-		       varray.vval[quad], 
-		       varray.vval[quad+1], 
-		       varray.voffset[quad+1] - varray.voffset[quad] );
-
-	for( long i=varray.voffset[quad]+1; i <= varray.voffset[quad+1]; i++ ) {
-    	    topv = botv++;
-    	    advance( topv - varray.voffset[quad], 
-		     botv - varray.voffset[quad], 
-		     varray.varray[botv] );
-	    if( i == vlines )
-		getPts( extrema[2] );
-	    else
-		getPts( backend );
-	    getGridExtent();
-            if( isolines ) {
-	        outline();
-	    } else {
-		if( canTile() ) 
-		    coveAndTile();
-		else
-		    mesh();
-	    }
-        }
-   }
-}
-
-
-void
-Slicer::outline( void )
-{
-    GridTrimVertex upper, lower;
-    Hull::init( );
-
-    backend.bgnoutline();
-    while( (nextupper( &upper )) ) {
-	if( upper.isGridVert() )
-	    backend.linevert( upper.g );
-	else
-	    backend.linevert( upper.t );
-    }
-    backend.endoutline();
-
-    backend.bgnoutline();
-    while( (nextlower( &lower )) ) {
-	if( lower.isGridVert() )
-	    backend.linevert( lower.g );
-	else
-	    backend.linevert( lower.t );
-    }
-    backend.endoutline();
-}
-
-
-void
-Slicer::outline( Arc_ptr jarc )
-{
-    jarc->markverts();
-
-    if( jarc->pwlArc->npts >= 2 ) {
-	backend.bgnoutline();
-	for( int j = jarc->pwlArc->npts-1; j >= 0; j--  )
-	    backend.linevert( &(jarc->pwlArc->pts[j]) );
-	backend.endoutline();
-    }
-}
-
-
diff --git a/src/glu/sgi/libnurbs/internals/slicer.h b/src/glu/sgi/libnurbs/internals/slicer.h
deleted file mode 100644
index e1f5d22ff10..00000000000
--- a/src/glu/sgi/libnurbs/internals/slicer.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * slicer.h
- *
- */
-
-#ifndef __gluslicer_h_
-#define __gluslicer_h_
-
-#include "trimregion.h"
-#include "mesher.h"
-#include "coveandtiler.h"
-#include "primitiveStream.h"
-#include "rectBlock.h"
-
-class Backend;
-class Arc;
-class TrimVertex;
-
-class Slicer : public CoveAndTiler, public Mesher {
-public:
-    			Slicer( Backend & );
-			~Slicer( void );
-    void		slice( Arc_ptr );
-    void		slice_old( Arc_ptr);
-    void		slice_new( Arc_ptr );
-    void                evalStream(primStream* );
-    void                evalRBArray(rectBlockArray* rbArray, gridWrap* grid);
-
-    void		outline( Arc_ptr );
-    void		setstriptessellation( REAL, REAL );
-    void		setisolines( int );
-
-    void                set_ulinear(int ulinear_flag)
-      {
-	ulinear = ulinear_flag;
-      }
-    void                set_vlinear(int vlinear_flag)
-      {
-	vlinear = vlinear_flag;
-      }
-private:
-    Backend&		backend;
-    REAL		oneOverDu;
-    REAL		du, dv;
-    int			isolines;
-
-    void		outline( void );
-    void		initGridlines( void );
-    void		advanceGridlines( long );
-
-    int                ulinear; //indicate whether uorder is 2 or not
-    int                vlinear; //indicate whether vorder is 2 or not
-};
-#endif /* __gluslicer_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/sorter.cc b/src/glu/sgi/libnurbs/internals/sorter.cc
deleted file mode 100644
index 7a79941492d..00000000000
--- a/src/glu/sgi/libnurbs/internals/sorter.cc
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * sorter.c++
- *
- */
-
-#include "glimports.h"
-#include "sorter.h"
-#include "mystdio.h"
-
-Sorter::Sorter( int _es )
-{
-    es = _es;
-}
-
-void
-Sorter::qsort( void *a, int n )
-{
-    qs1( (char *)a, ((char *)a)+n*es);
-}
-
-int
-Sorter::qscmp( char *, char * )
-{
-    _glu_dprintf( "Sorter::qscmp: pure virtual called\n" );
-    return 0;
-}
-
-
-void
-Sorter::qsexc( char *, char * )
-{
-    _glu_dprintf( "Sorter::qsexc: pure virtual called\n" );
-}
-
-
-void
-Sorter::qstexc( char *, char *, char * )
-{
-    _glu_dprintf( "Sorter::qstexc: pure virtual called\n" );
-}
-
-void
-Sorter::qs1( char *a,  char *l )
-{
-    char *i, *j;
-    char	*lp, *hp;
-    int	c;
-    unsigned int n;
-
-start:
-    if((n=l-a) <= (unsigned int)es)
-	    return;
-    n = es * (n / (2*es));
-    hp = lp = a+n;
-    i = a;
-    j = l-es;
-    while(1) {
-	if(i < lp) {
-	    if((c = qscmp(i, lp)) == 0) {
-		qsexc(i, lp -= es);
-		continue;
-	    }
-	    if(c < 0) {
-		i += es;
-		continue;
-	    }
-	}
-
-loop:
-	if(j > hp) {
-	    if((c = qscmp(hp, j)) == 0) {
-		qsexc(hp += es, j);
-		goto loop;
-	    }
-	    if(c > 0) {
-		if(i == lp) {
-		    qstexc(i, hp += es, j);
-		    i = lp += es;
-		    goto loop;
-		}
-		qsexc(i, j);
-		j -= es;
-		i += es;
-		continue;
-	    }
-	    j -= es;
-	    goto loop;
-	}
-
-	if(i == lp) {
-	    if(lp-a >= l-hp) {
-		qs1(hp+es, l);
-		l = lp;
-	    } else {
-		qs1(a, lp);
-		a = hp+es;
-	    }
-	    goto start;
-	}
-
-	qstexc(j, lp -= es, i);
-	j = hp -= es;
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/sorter.h b/src/glu/sgi/libnurbs/internals/sorter.h
deleted file mode 100644
index 57ea1212907..00000000000
--- a/src/glu/sgi/libnurbs/internals/sorter.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef __glusorter_h_
-#define __glusorter_h_
-
-class Sorter {
-public:
-			Sorter( int es );
-    virtual             ~Sorter() { /* silence warning*/ }
-    void		qsort( void *a, int n );
-
-protected:	
-    virtual int		qscmp( char *, char * );
-    virtual void	qsexc( char *i, char *j );	// i<-j, j<-i 
-    virtual void	qstexc( char *i, char *j, char *k ); // i<-k, k<-j, j<-i 
-
-private:
-    void		qs1( char *, char * );
-    int 		es;
-};
-#endif /* __glusorter_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/splitarcs.cc b/src/glu/sgi/libnurbs/internals/splitarcs.cc
deleted file mode 100644
index 1f79d543fbc..00000000000
--- a/src/glu/sgi/libnurbs/internals/splitarcs.cc
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * splitarcs.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mysetjmp.h"
-#include "mystdio.h"
-#include "subdivider.h"
-#include "arcsorter.h"
-#include "arc.h"
-#include "bin.h"
-
-/* local preprocessor definitions */
-#define MAXARCS	10
-
-/*----------------------------------------------------------------------------
- * Subdivider::split - split trim regions in source bin by line (param == value). 
- *----------------------------------------------------------------------------
- */
-
-void
-Subdivider::split( Bin& bin, Bin& left, Bin& right, int param, REAL value )
-{
-    Bin	intersections, unknown; 
-
-    partition( bin, left, intersections, right, unknown, param, value );
-
-    int	count = intersections.numarcs();
-    if( count % 2 ) {
-#ifndef NDEBUG
-	left.show( "left" );
-	intersections.show( "intersections" );
-	right.show( "right" );
-#endif
-	::mylongjmp( jumpbuffer, 29 );
-    }
-
-    Arc_ptr arclist[MAXARCS], *list;
-    if( count >= MAXARCS ) {
-	list = new Arc_ptr[count];
-    } else {
-	list = arclist;
-    }
-
-    Arc_ptr jarc, *last, *lptr;
-    for( last = list; (jarc=intersections.removearc()) != NULL; last++ )
-	*last = jarc;
-
-    if( param == 0 ) { /* sort into increasing t order */
-	ArcSdirSorter sorter(*this);
-	sorter.qsort( list, count );
-	
-        //::qsort ((void *)list, count, sizeof(Arc_ptr), (cmpfunc)compare_s);
-	for( lptr=list; lptr<last; lptr+=2 )
-	    check_s ( lptr[0], lptr[1] );
-	for( lptr=list; lptr<last; lptr+=2 )
-	    join_s ( left, right, lptr[0], lptr[1] );
-	for( lptr=list; lptr != last; lptr++ ) {
-	    if( ((*lptr)->head()[0] <= value) && ((*lptr)->tail()[0] <= value) )
-		left.addarc( *lptr  );
-	    else
-		right.addarc( *lptr  );
-	}
-    } else { /* sort into decreasing s order */
-	ArcTdirSorter sorter(*this);
-	sorter.qsort( list, count );
-        //::qsort ((void *)list, count, sizeof(Arc_ptr), (cmpfunc)compare_t);
-	for( lptr=list; lptr<last; lptr+=2 )
-	    check_t ( lptr[0], lptr[1] );
-	for( lptr=list; lptr<last; lptr+=2 )
-	    join_t ( left, right, lptr[0], lptr[1] );
-	for( lptr=list; lptr != last; lptr++ ) {
-	    if( ((*lptr)->head()[1] <= value) && ((*lptr)->tail()[1] <= value) )
-		left.addarc( *lptr  );
-	    else
-		right.addarc( *lptr  );
-	}
-    }
-
-    if( list != arclist ) delete[] list;
-    unknown.adopt(); 
-}
-
-
-void
-Subdivider::check_s( Arc_ptr jarc1, Arc_ptr jarc2 )
-{
-    assert( jarc1->check( ) != 0 );
-    assert( jarc2->check( ) != 0 );
-    assert( jarc1->next->check( ) != 0 );
-    assert( jarc2->next->check( ) != 0 );
-    assert( jarc1 != jarc2 );
-
-    /* XXX - if these assertions fail, it is due to user error or
-	     undersampling */
-    if( ! ( jarc1->tail()[0] < (jarc1)->head()[0] ) ) {
-#ifndef NDEBUG
-	_glu_dprintf( "s difference %f\n",  (jarc1)->tail()[0] - (jarc1)->head()[0] );
-#endif
-	::mylongjmp( jumpbuffer, 28 );
-    }
-
-    if( ! ( jarc2->tail()[0] > (jarc2)->head()[0] ) ) { 
-#ifndef NDEBUG
-	_glu_dprintf( "s difference %f\n",  (jarc2)->tail()[0] - (jarc2)->head()[0] );
-#endif
-	::mylongjmp( jumpbuffer, 28 );
-    }
-}
-
-inline void
-Subdivider::link( Arc_ptr jarc1, Arc_ptr jarc2, Arc_ptr up, Arc_ptr down )
-{
-    up->nuid = down->nuid = 0;		// XXX
-
-    up->next = jarc2;
-    down->next = jarc1;
-    up->prev = jarc1->prev;
-    down->prev = jarc2->prev;
-
-    down->next->prev = down;
-    up->next->prev = up;
-    down->prev->next = down;
-    up->prev->next = up;
-}
-
-inline void 
-Subdivider::simple_link( Arc_ptr jarc1, Arc_ptr jarc2 )
-{
-    Arc_ptr tmp = jarc2->prev;
-    jarc2->prev = jarc1->prev;
-    jarc1->prev = tmp;
-    jarc2->prev->next = jarc2;
-    jarc1->prev->next = jarc1;
-}
-
-
-/*----------------------------------------------------------------------------
- * join - add a pair of oppositely directed jordan arcs between two arcs
- *----------------------------------------------------------------------------
- */
-
-void
-Subdivider::join_s( Bin& left, Bin& right, Arc_ptr jarc1, Arc_ptr jarc2 )
-{
-    assert( jarc1->check( ) != 0);
-    assert( jarc2->check( ) != 0);
-    assert( jarc1 != jarc2 );
-
-    if( ! jarc1->getitail() )
-	jarc1 = jarc1->next;
-
-    if( ! jarc2->getitail() )
-	jarc2 = jarc2->next;
-
-    REAL s = jarc1->tail()[0];
-    REAL t1 = jarc1->tail()[1];
-    REAL t2 = jarc2->tail()[1];
-
-    if( t1 == t2 ) {
-	simple_link( jarc1, jarc2 );
-    } else {
-	Arc_ptr newright = new(arcpool) Arc( arc_right, 0 ); 
-	Arc_ptr newleft = new(arcpool) Arc( arc_left, 0 );
-	assert( t1 < t2 );
-	if( isBezierArcType() ) {
-	    arctessellator.bezier( newright, s, s, t1, t2 );
-	    arctessellator.bezier( newleft, s, s, t2, t1 );
-	} else {
-	    arctessellator.pwl_right( newright, s, t1, t2, stepsizes[0] );
-	    arctessellator.pwl_left( newleft, s, t2, t1, stepsizes[2] );
-	}
-	link( jarc1, jarc2, newright, newleft );
-	left.addarc( newright  );
-	right.addarc( newleft  );
-    }
-
-    assert( jarc1->check( ) != 0 );
-    assert( jarc2->check( ) != 0 );
-    assert( jarc1->next->check( ) != 0);
-    assert( jarc2->next->check( ) != 0);
-}
-
-void
-Subdivider::check_t( Arc_ptr jarc1, Arc_ptr jarc2 )
-{
-    assert( jarc1->check( ) != 0 );
-    assert( jarc2->check( ) != 0 );
-    assert( jarc1->next->check( ) != 0 );
-    assert( jarc2->next->check( ) != 0 );
-    assert( jarc1 != jarc2 );
-
-    /* XXX - if these assertions fail, it is due to user error or
-	     undersampling */
-    if( ! ( jarc1->tail()[1] < (jarc1)->head()[1] ) ) {
-#ifndef NDEBUG
-	_glu_dprintf( "t difference %f\n",  jarc1->tail()[1] - (jarc1)->head()[1] );
-#endif
-	::mylongjmp( jumpbuffer, 28 );
-    }
-
-    if( ! ( jarc2->tail()[1] > (jarc2)->head()[1] ) ) { 
-#ifndef NDEBUG
-	_glu_dprintf( "t difference %f\n",  jarc2->tail()[1] - (jarc2)->head()[1] );
-#endif
-	::mylongjmp( jumpbuffer, 28 );
-    }
-}
-
-/*----------------------------------------------------------------------------
- * join_t - add a pair of oppositely directed jordan arcs between two arcs
- *----------------------------------------------------------------------------
- */
-
-void
-Subdivider::join_t( Bin& bottom, Bin& top, Arc_ptr jarc1, Arc_ptr jarc2 )
-{
-    assert( jarc1->check( ) != 0 );
-    assert( jarc2->check( ) != 0 );
-    assert( jarc1->next->check( ) != 0 );
-    assert( jarc2->next->check( ) != 0 );
-    assert( jarc1 != jarc2 );
-
-    if( ! jarc1->getitail() )
-	jarc1 = jarc1->next;
-
-    if( ! jarc2->getitail() )
-	jarc2 = jarc2->next;
-
-    REAL s1 = jarc1->tail()[0];
-    REAL s2 = jarc2->tail()[0];
-    REAL t  = jarc1->tail()[1];
-
-    if( s1 == s2 ) {
-	simple_link( jarc1, jarc2 );
-    } else {
-	Arc_ptr newtop = new(arcpool) Arc( arc_top, 0 );
-	Arc_ptr newbot = new(arcpool) Arc( arc_bottom, 0 );
-	assert( s1 > s2 );
-	if( isBezierArcType() ) {
-	    arctessellator.bezier( newtop, s1, s2, t, t );
-	    arctessellator.bezier( newbot, s2, s1, t, t );
-	} else {
-	    arctessellator.pwl_top( newtop, t, s1, s2, stepsizes[1] );
-	    arctessellator.pwl_bottom( newbot, t, s2, s1, stepsizes[3] );
-	}
-	link( jarc1, jarc2, newtop, newbot );
-	bottom.addarc( newtop  );
-	top.addarc( newbot  );
-    }
-
-    assert( jarc1->check( ) != 0 );
-    assert( jarc2->check( ) != 0 );
-    assert( jarc1->next->check( ) != 0 );
-    assert( jarc2->next->check( ) != 0 );
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/subdivider.cc b/src/glu/sgi/libnurbs/internals/subdivider.cc
deleted file mode 100644
index ccddc270ff9..00000000000
--- a/src/glu/sgi/libnurbs/internals/subdivider.cc
+++ /dev/null
@@ -1,912 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * subdivider.cxx
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "subdivider.h"
-#include "arc.h"
-#include "bezierarc.h"
-#include "bin.h"
-#include "renderhints.h"
-#include "backend.h"
-#include "mapdesc.h"
-#include "quilt.h"
-#include "patchlist.h"
-#include "patch.h"
-#include "nurbsconsts.h"
-#include "trimvertpool.h"
-#include "simplemath.h"
-
-#include "polyUtil.h" //for function area()
-
-//#define  PARTITION_TEST
-#ifdef PARTITION_TEST
-#include "partitionY.h"
-#include "monoTriangulation.h"
-#include "dataTransform.h"
-#include "monoChain.h"
-
-#endif
-
-
-#define OPTIMIZE_UNTRIMED_CASE
-
-
-Bin*
-Subdivider::makePatchBoundary( const REAL *from, const REAL *to )
-{ 
-    Bin* ret = new Bin();
-    REAL smin = from[0];
-    REAL smax = to[0];
-    REAL tmin = from[1];
-    REAL tmax = to[1];
-
-    pjarc = 0;
-
-    Arc_ptr jarc = new(arcpool) Arc( arc_bottom, 0 );
-    arctessellator.bezier( jarc, smin, smax, tmin, tmin );
-    ret->addarc( jarc  );
-    pjarc = jarc->append( pjarc );
-
-    jarc = new(arcpool) Arc( arc_right, 0 );
-    arctessellator.bezier( jarc, smax, smax, tmin, tmax );
-    ret->addarc( jarc  );
-    pjarc = jarc->append( pjarc );
-
-    jarc = new(arcpool) Arc( arc_top, 0 );
-    arctessellator.bezier( jarc, smax, smin, tmax, tmax );
-    ret->addarc( jarc  );
-    pjarc = jarc->append( pjarc );
-
-    jarc = new(arcpool) Arc( arc_left, 0 );
-    arctessellator.bezier( jarc, smin, smin, tmax, tmin );
-    ret->addarc( jarc  );
-    jarc->append( pjarc );
-
-    assert( jarc->check() != 0 );
-    return ret;
-}
-
-/*---------------------------------------------------------------------------
- * Subdivider - construct a subdivider
- *---------------------------------------------------------------------------
- */
-
-Subdivider::Subdivider( Renderhints& r, Backend& b ) 
-	: slicer( b ),
-	  arctessellator( trimvertexpool, pwlarcpool ), 
-	  arcpool( sizeof( Arc), 1, "arcpool" ),
- 	  bezierarcpool( sizeof( BezierArc ), 1, "Bezarcpool" ),
-	  pwlarcpool( sizeof( PwlArc ), 1, "Pwlarcpool" ),
-	  renderhints( r ),
-	  backend( b )
-{
-}
-
-void
-Subdivider::setJumpbuffer( JumpBuffer *j )
-{
-    jumpbuffer = j;
-}
-
-/*---------------------------------------------------------------------------
- * clear - reset all state after possible error condition
- *---------------------------------------------------------------------------
- */
-
-void		
-Subdivider::clear( void )
-{
-    trimvertexpool.clear();     
-    arcpool.clear();
-    pwlarcpool.clear();
-    bezierarcpool.clear();
-}
-
-/*---------------------------------------------------------------------------
- * ~Subdivider - destroy a subdivider
- *---------------------------------------------------------------------------
- */
-
-Subdivider::~Subdivider( void )
-{
-}
-
-/*---------------------------------------------------------------------------
- * addArc - add a bezier arc to a trim loop and to a bin
- *---------------------------------------------------------------------------
- */
-void
-Subdivider::addArc( REAL *cpts, Quilt *quilt, long _nuid )
-{
-    BezierArc *bezierArc = new(bezierarcpool) BezierArc;
-    Arc *jarc  		= new(arcpool) Arc( arc_none, _nuid );
-    jarc->pwlArc	= 0;
-    jarc->bezierArc	= bezierArc;
-    bezierArc->order	= quilt->qspec->order;
-    bezierArc->stride	= quilt->qspec->stride;
-    bezierArc->mapdesc	= quilt->mapdesc;
-    bezierArc->cpts	= cpts;
-    initialbin.addarc( jarc );
-    pjarc		= jarc->append( pjarc );
-}
-
-/*---------------------------------------------------------------------------
- * addArc - add a pwl arc to a trim loop and to a bin
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::addArc( int npts, TrimVertex *pts, long _nuid ) 
-{
-    Arc *jarc 		= new(arcpool) Arc( arc_none, _nuid );
-    jarc->pwlArc	= new(pwlarcpool) PwlArc( npts, pts );        
-    initialbin.addarc( jarc  );
-    pjarc		= jarc->append( pjarc );
-}
-
-void
-Subdivider::beginQuilts( void )
-{
-    qlist = 0;
-}
-
-void
-Subdivider::addQuilt( Quilt *quilt )
-{
-    quilt->next = qlist;
-    qlist = quilt;
-}
-
-/*---------------------------------------------------------------------------
- * drawSurfaces - main entry point for surface tessellation
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::drawSurfaces( long nuid )
-{
-    renderhints.init( );
-
-    if (qlist == NULL) 
-      {
-	//initialbin could be nonempty due to some errors
-	freejarcs(initialbin);
-	return;
-      }
-
-    for( Quilt *q = qlist; q; q = q->next ) {
-	if( q->isCulled( ) == CULL_TRIVIAL_REJECT ) {
-	    freejarcs( initialbin );
-	    return;
-	}
-    }
-
-
-    REAL from[2], to[2];
-    qlist->getRange( from, to, spbrkpts, tpbrkpts );
-#ifdef OPTIMIZE_UNTRIMED_CASE
-    //perform optimization only when the samplng method is 
-    //DOMAIN_DISTANCE and the display methdo is either 
-    //fill or outline_polygon.
-    int optimize = (is_domain_distance_sampling && (renderhints.display_method != N_OUTLINE_PATCH));
-#endif
-
-    if( ! initialbin.isnonempty() ) {
-#ifdef OPTIMIZE_UNTRIMED_CASE
-        if(! optimize )
-	  {	
-
-	  makeBorderTrim( from, to );
-	  }
-#else
-	makeBorderTrim( from, to );
-#endif
-    } else {
-	REAL rate[2];
-	qlist->findRates( spbrkpts, tpbrkpts, rate );
-
-    	if( decompose( initialbin, min(rate[0], rate[1]) ) ) 
-	    mylongjmp( jumpbuffer, 31 );
-    }
-
-    backend.bgnsurf( renderhints.wiretris, renderhints.wirequads, nuid );
-
-#ifdef PARTITION_TEST
- if(    initialbin.isnonempty() && spbrkpts.end-2 == spbrkpts.start && 
-	tpbrkpts.end-2 == tpbrkpts.start)
-{
-    for(int i=spbrkpts.start; i<spbrkpts.end-1; i++){
-      for(int j=tpbrkpts.start; j<tpbrkpts.end-1; j++){
-	Real pta[2], ptb[2];
-	pta[0] = spbrkpts.pts[i];
-	ptb[0] = spbrkpts.pts[i+1];
-	pta[1] = tpbrkpts.pts[j];
-	ptb[1] = tpbrkpts.pts[j+1];
-	qlist->downloadAll(pta, ptb, backend);
-
-	directedLine *poly;
-
-	  {
-
-	    poly = bin_to_DLineLoops(initialbin);
-	    
-	    poly=poly->deleteDegenerateLinesAllPolygons();	    	
-
-    sampledLine* retSampledLines;
-//printf("before MC_partition\n");	    
-	    poly = MC_partitionY(poly, &retSampledLines);
-//printf("after MC_partition\n");	    
-
-	  }
-
-
-	{
-	  primStream pStream(5000,5000);
-	  directedLine* temp;
-
-	  for(temp=poly; temp != NULL; temp=temp->getNextPolygon())
-
-	    monoTriangulation(temp, &pStream);
-
-	  slicer.evalStream(&pStream);
-
-	}
-	//need to clean up space
-      }
-    }
-    freejarcs( initialbin );
-    backend.endsurf();
-    return;
-
-    /*
-    printf("num_polygons=%i\n", poly->numPolygons());
-    printf("num_edges=%i\n", poly->numEdgesAllPolygons());
-    poly->writeAllPolygons("zloutputFile");
-    return;
-    {
-      primStream pStream(20,20);
-      for(directedLine* tempD = poly; tempD != NULL; tempD = tempD->getNextPolygon())
-	monoTriangulation(tempD, &pStream);
-    }
-    return;
-    */
-}
-#endif //PARTITION_TEST
-
-
-#ifdef OPTIMIZE_UNTRIMED_CASE
-    if( (!initialbin.isnonempty())  && optimize )
-      {
-	int i,j;
-	int num_u_steps;
-        int num_v_steps;
-	for(i=spbrkpts.start; i<spbrkpts.end-1; i++){
-	  for(j=tpbrkpts.start; j<tpbrkpts.end-1; j++){
-	    Real pta[2], ptb[2];
-	    pta[0] = spbrkpts.pts[i];
-	    ptb[0] = spbrkpts.pts[i+1];
-	    pta[1] = tpbrkpts.pts[j];
-	    ptb[1] = tpbrkpts.pts[j+1];
-	    qlist->downloadAll(pta, ptb, backend);
-	   
-            num_u_steps = (int) (domain_distance_u_rate * (ptb[0]-pta[0]));
-            num_v_steps = (int) (domain_distance_v_rate * (ptb[1]-pta[1]));
-
-            if(num_u_steps <= 0) num_u_steps = 1;
-            if(num_v_steps <= 0) num_v_steps = 1;
-
-	    backend.surfgrid(pta[0], ptb[0], num_u_steps, 
-			     ptb[1], pta[1], num_v_steps);
-	    backend.surfmesh(0,0,num_u_steps,num_v_steps);
-
-        
-
-	    continue;
-	    /* the following is left for reference purpose, don't delete
-	    {
-	    Bin* tempSource;	
-	      Patchlist patchlist(qlist, pta, ptb);
-	      patchlist.getstepsize();
-
-	      tempSource=makePatchBoundary(pta, ptb);
-
-	      tessellation(*tempSource, patchlist);
-
-	      render(*tempSource);
-	      delete tempSource;
-	    }
-	    */
-	  }
-	}
-      }
-    else
-      subdivideInS( initialbin );
-#else
-
-    subdivideInS( initialbin );
-#endif
-
-    backend.endsurf();
-
-}
-
-void
-Subdivider::subdivideInS( Bin& source )
-{
-    if( renderhints.display_method == N_OUTLINE_PARAM ) {
-	outline( source );
-	freejarcs( source );
-    } else {
-	setArcTypeBezier();
-	setNonDegenerate();
-	splitInS( source, spbrkpts.start, spbrkpts.end );
-    }
-}
-
-
-/*---------------------------------------------------------------------------
- * splitInS - split a patch and a bin by an isoparametric line
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::splitInS( Bin& source, int start, int end )
-{
-    if( source.isnonempty() ) {
-        if( start != end ) {
-	    int	i = start + (end - start) / 2;
-	    Bin left, right;
-	    split( source, left, right, 0, spbrkpts.pts[i] );
-	    splitInS( left, start, i );
-	    splitInS( right, i+1, end );
-        } else {
-	    if( start == spbrkpts.start || start == spbrkpts.end ) {
-		freejarcs( source );
-	    } else if( renderhints.display_method == N_OUTLINE_PARAM_S ) {
-		outline( source );
-		freejarcs( source );
-	    } else {
-		setArcTypeBezier();
-		setNonDegenerate();
-		s_index = start;
-		splitInT( source, tpbrkpts.start, tpbrkpts.end );
-	    }
-        }
-    } 
-}
-
-/*---------------------------------------------------------------------------
- * splitInT - split a patch and a bin by an isoparametric line
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::splitInT( Bin& source, int start, int end )
-{
-    if( source.isnonempty() ) {
-        if( start != end ) {
-	    int	i = start + (end - start) / 2;
-	    Bin left, right;
-	    split( source, left, right, 1, tpbrkpts.pts[i] );
-	    splitInT( left, start, i );
-	    splitInT( right, i+1, end );
-        } else {
-	    if( start == tpbrkpts.start || start == tpbrkpts.end ) {
-		freejarcs( source );
-	    } else if( renderhints.display_method == N_OUTLINE_PARAM_ST ) {
-		outline( source );
-		freejarcs( source );
-	    } else {
-		t_index = start;
-		setArcTypeBezier();
-		setDegenerate();
-
-		REAL pta[2], ptb[2];
-		pta[0] = spbrkpts.pts[s_index-1];
-		pta[1] = tpbrkpts.pts[t_index-1];
-
-		ptb[0] = spbrkpts.pts[s_index];
-		ptb[1] = tpbrkpts.pts[t_index];
-		qlist->downloadAll( pta, ptb, backend );
-	    
-		Patchlist patchlist( qlist, pta, ptb );
-/*
-printf("-------samplingSplit-----\n");
-source.show("samplingSplit source");
-*/
-		samplingSplit( source, patchlist, renderhints.maxsubdivisions, 0 );
-		setNonDegenerate();
-		setArcTypeBezier();
-	    }
-        }
-    } 
-}
-
-/*--------------------------------------------------------------------------
- * samplingSplit - recursively subdivide patch, cull check each subpatch  
- *--------------------------------------------------------------------------
- */
-
-void
-Subdivider::samplingSplit( 
-    Bin& source, 
-    Patchlist& patchlist, 
-    int subdivisions, 
-    int param )
-{
-    if( ! source.isnonempty() ) return;
-
-    if( patchlist.cullCheck() == CULL_TRIVIAL_REJECT ) {
-	freejarcs( source );
-	return;
-    }
-
-    patchlist.getstepsize();
-
-    if( renderhints.display_method == N_OUTLINE_PATCH ) {
-        tessellation( source, patchlist );
-	outline( source );
-	freejarcs( source );
-	return;
-    } 
-
-    //patchlist.clamp();
-
-    tessellation( source, patchlist );
-
-    if( patchlist.needsSamplingSubdivision() && (subdivisions > 0) ) {
-	if( ! patchlist.needsSubdivision( 0 ) )
-	    param = 1;
-	else if( ! patchlist.needsSubdivision( 1 ) )
-	    param = 0;
-	else
-	    param = 1 - param;
-
-	Bin left, right;
-	REAL mid = ( patchlist.pspec[param].range[0] +
-		     patchlist.pspec[param].range[1] ) * 0.5;
-	split( source, left, right, param, mid );
-	Patchlist subpatchlist( patchlist, param, mid );
-	samplingSplit( left, subpatchlist, subdivisions-1, param );
-	samplingSplit( right, patchlist, subdivisions-1, param );
-    } else {
-	setArcTypePwl();
-	setDegenerate();
-	nonSamplingSplit( source, patchlist, subdivisions, param );
-	setDegenerate();
-	setArcTypeBezier();
-    }
-}
-
-void
-Subdivider::nonSamplingSplit( 
-    Bin& source, 
-    Patchlist& patchlist, 
-    int subdivisions, 
-    int param )
-{
-    if( patchlist.needsNonSamplingSubdivision() && (subdivisions > 0) ) {
-	param = 1 - param;
-
-	Bin left, right;
-	REAL mid = ( patchlist.pspec[param].range[0] +
-		     patchlist.pspec[param].range[1] ) * 0.5;
-	split( source, left, right, param, mid );
-	Patchlist subpatchlist( patchlist, param, mid );
-	if( left.isnonempty() ) {
-	    if( subpatchlist.cullCheck() == CULL_TRIVIAL_REJECT ) 
-		freejarcs( left );
-	    else
-	        nonSamplingSplit( left, subpatchlist, subdivisions-1, param );
-	}
-	if( right.isnonempty() ) {
-	    if( patchlist.cullCheck() == CULL_TRIVIAL_REJECT ) 
-		freejarcs( right );
-	    else
-	        nonSamplingSplit( right, patchlist, subdivisions-1, param );
-	}
-
-    } else {
-	// make bbox calls
-	patchlist.bbox();
-	backend.patch( patchlist.pspec[0].range[0], patchlist.pspec[0].range[1],
-		       patchlist.pspec[1].range[0], patchlist.pspec[1].range[1] );
-    
-	if( renderhints.display_method == N_OUTLINE_SUBDIV ) {
-	    outline( source );
-	    freejarcs( source );
-	} else {
-	    setArcTypePwl();
-	    setDegenerate();
-	    findIrregularS( source );
-	    monosplitInS( source, smbrkpts.start, smbrkpts.end );
-	}
-    }
-}
-
-/*--------------------------------------------------------------------------
- * tessellation - set tessellation of interior and boundary of patch
- *--------------------------------------------------------------------------
- */
-
-void
-Subdivider::tessellation( Bin& bin, Patchlist &patchlist )
-{
-    // tessellate unsampled trim curves
-    tessellate( bin, patchlist.pspec[1].sidestep[1], patchlist.pspec[0].sidestep[1],
-	 patchlist.pspec[1].sidestep[0], patchlist.pspec[0].sidestep[0] );
-
-    // set interior sampling rates
-    slicer.setstriptessellation( patchlist.pspec[0].stepsize, patchlist.pspec[1].stepsize );
-
-    //added by zl: set the order which will be used in slicer.c++
-    slicer.set_ulinear( (patchlist.get_uorder() == 2));
-    slicer.set_vlinear( (patchlist.get_vorder() == 2));
-
-    // set boundary sampling rates
-    stepsizes[0] = patchlist.pspec[1].stepsize;
-    stepsizes[1] = patchlist.pspec[0].stepsize;
-    stepsizes[2] = patchlist.pspec[1].stepsize;
-    stepsizes[3] = patchlist.pspec[0].stepsize;
-}
-
-/*---------------------------------------------------------------------------
- * monosplitInS - split a patch and a bin by an isoparametric line
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::monosplitInS( Bin& source, int start, int end )
-{
-    if( source.isnonempty() ) {
-        if( start != end ) {
-	    int	i = start + (end - start) / 2;
-	    Bin left, right;
-	    split( source, left, right, 0, smbrkpts.pts[i] );
-	    monosplitInS( left, start, i );
-	    monosplitInS( right, i+1, end );
-        } else {
-	    if( renderhints.display_method == N_OUTLINE_SUBDIV_S ) {
-		outline( source );
-		freejarcs( source );
-	    } else {
-		setArcTypePwl();
-		setDegenerate();
-		findIrregularT( source );
-		monosplitInT( source, tmbrkpts.start, tmbrkpts.end );
-	    }
-        }
-    } 
-}
-
-/*---------------------------------------------------------------------------
- * monosplitInT - split a patch and a bin by an isoparametric line
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::monosplitInT( Bin& source, int start, int end )
-{
-    if( source.isnonempty() ) {
-        if( start != end ) {
-	    int	i = start + (end - start) / 2;
-	    Bin left, right;
-	    split( source, left, right, 1, tmbrkpts.pts[i] );
-	    monosplitInT( left, start, i );
-	    monosplitInT( right, i+1, end );
-        } else {
-	    if( renderhints.display_method == N_OUTLINE_SUBDIV_ST ) {
-		outline( source );
-		freejarcs( source );
-	    } else {
-/*
-printf("*******render\n");
-source.show("source\n");
-*/
-		render( source );
-		freejarcs( source );
-	    }
-        }
-    } 
-}
-
-
-/*----------------------------------------------------------------------------
- * findIrregularS - determine points of non-monotonicity is s direction
- *----------------------------------------------------------------------------
- */
-
-void
-Subdivider::findIrregularS( Bin& bin )
-{
-    assert( bin.firstarc()->check() != 0 );
-
-    smbrkpts.grow( bin.numarcs() );
-
-    for( Arc_ptr jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	REAL *a = jarc->prev->tail();
-	REAL *b = jarc->tail();
-	REAL *c = jarc->head();
-
-	if( b[1] == a[1] && b[1] == c[1] ) continue;
-
-	//corrected code
-	if((b[1]<=a[1] && b[1] <= c[1]) ||
-	   (b[1]>=a[1] && b[1] >= c[1]))
-	  {
-	    //each arc (jarc, jarc->prev, jarc->next) is a 
-	    //monotone arc consisting of multiple line segements.
-	    //it may happen that jarc->prev and jarc->next are the same,
-	    //that is, jarc->prev and jarc form a closed loop.
-	    //In such case, a and c will be the same.
-            if(a[0]==c[0] && a[1] == c[1])
-	      {
-		if(jarc->pwlArc->npts >2)
-		  {
-		    c = jarc->pwlArc->pts[jarc->pwlArc->npts-2].param;
-		  }
-		else
-		  {
-		    assert(jarc->prev->pwlArc->npts>2);
-		    a = jarc->prev->pwlArc->pts[jarc->prev->pwlArc->npts-2].param;
-		  }
-		    
-	      }
-	    if(area(a,b,c) < 0)
-	      {
-		smbrkpts.add(b[0]);
-	      }
-
-	  }
-
-	/* old code, 
-	if( b[1] <= a[1] && b[1] <= c[1] ) {
-	    if( ! ccwTurn_tr( jarc->prev, jarc ) )
-                smbrkpts.add( b[0] );
-	} else if( b[1] >= a[1] && b[1] >= c[1] ) {
-	    if( ! ccwTurn_tl( jarc->prev, jarc ) )
-                smbrkpts.add( b[0] );
-        }
-	*/
-
-    }
-
-    smbrkpts.filter();
-} 
-
-/*----------------------------------------------------------------------------
- * findIrregularT - determine points of non-monotonicity in t direction
- *		     where one arc is parallel to the s axis.
- *----------------------------------------------------------------------------
- */
-
-void
-Subdivider::findIrregularT( Bin& bin )
-{
-    assert( bin.firstarc()->check() != 0 );
-
-    tmbrkpts.grow( bin.numarcs() );
-
-    for( Arc_ptr jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	REAL *a = jarc->prev->tail();
-	REAL *b = jarc->tail();
-	REAL *c = jarc->head();
-
-	if( b[0] == a[0] && b[0] == c[0] ) continue;
-
-	if( b[0] <= a[0] && b[0] <= c[0] ) {
-	    if( a[1] != b[1] && b[1] != c[1] ) continue; 
-	    if( ! ccwTurn_sr( jarc->prev, jarc ) )
-                tmbrkpts.add( b[1] );
-	} else if ( b[0] >= a[0] && b[0] >= c[0] ) {
-	    if( a[1] != b[1] && b[1] != c[1] ) continue; 
-	    if( ! ccwTurn_sl( jarc->prev, jarc ) )
-                tmbrkpts.add( b[1] );
-	}
-    }
-    tmbrkpts.filter( );
-}
-
-/*-----------------------------------------------------------------------------
- * makeBorderTrim - if no user input trimming data then create 
- * a trimming curve around the boundaries of the Quilt.  The curve consists of
- * four Jordan arcs, one for each side of the Quilt, connected, of course,
- * head to tail. 
- *-----------------------------------------------------------------------------
- */
-
-void
-Subdivider::makeBorderTrim( const REAL *from, const REAL *to )
-{ 
-    REAL smin = from[0];
-    REAL smax = to[0];
-    REAL tmin = from[1];
-    REAL tmax = to[1];
-
-    pjarc = 0;
-
-    Arc_ptr jarc = new(arcpool) Arc( arc_bottom, 0 );
-    arctessellator.bezier( jarc, smin, smax, tmin, tmin );
-    initialbin.addarc( jarc  );
-    pjarc = jarc->append( pjarc );
-
-    jarc = new(arcpool) Arc( arc_right, 0 );
-    arctessellator.bezier( jarc, smax, smax, tmin, tmax );
-    initialbin.addarc( jarc  );
-    pjarc = jarc->append( pjarc );
-
-    jarc = new(arcpool) Arc( arc_top, 0 );
-    arctessellator.bezier( jarc, smax, smin, tmax, tmax );
-    initialbin.addarc( jarc  );
-    pjarc = jarc->append( pjarc );
-
-    jarc = new(arcpool) Arc( arc_left, 0 );
-    arctessellator.bezier( jarc, smin, smin, tmax, tmin );
-    initialbin.addarc( jarc  );
-    jarc->append( pjarc );
-
-    assert( jarc->check() != 0 );
-}
-
-/*----------------------------------------------------------------------------
- * render - renders all monotone regions in a bin and frees the bin
- *----------------------------------------------------------------------------
- */
-
-void
-Subdivider::render( Bin& bin )
-{
-    bin.markall();
-
-#ifdef N_ISOLINE_S
-    slicer.setisolines( ( renderhints.display_method == N_ISOLINE_S ) ? 1 : 0 );
-#else
-    slicer.setisolines( 0 );
-#endif
-
-    for( Arc_ptr jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	if( jarc->ismarked() ) {
-	    assert( jarc->check( ) != 0 );
-	    Arc_ptr jarchead = jarc;
-	    do {
-		jarc->clearmark();
-		jarc = jarc->next;
-	    } while (jarc != jarchead);
-	    slicer.slice( jarc );
-	}
-    }
-}
-
-/*---------------------------------------------------------------------------
- * outline - render the trimmed patch by outlining the boundary 
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::outline( Bin& bin )
-{
-    bin.markall();
-    for( Arc_ptr jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	if( jarc->ismarked() ) {
-	    assert( jarc->check( ) != 0 );
-	    Arc_ptr jarchead = jarc;
-	    do {
-		slicer.outline( jarc );
-		jarc->clearmark();
-		jarc = jarc->prev;
-	    } while (jarc != jarchead);
-	}
-    }
-}
-
-/*---------------------------------------------------------------------------
- * freejarcs - free all arcs in a bin
- *---------------------------------------------------------------------------
- */
-
-void
-Subdivider::freejarcs( Bin& bin )
-{
-    bin.adopt();	/* XXX - should not be necessary */
-
-    Arc_ptr jarc;
-    while( (jarc = bin.removearc()) != NULL ) {
-	if( jarc->pwlArc ) jarc->pwlArc->deleteMe( pwlarcpool ); jarc->pwlArc = 0;
-	if( jarc->bezierArc) jarc->bezierArc->deleteMe( bezierarcpool ); jarc->bezierArc = 0;
-	jarc->deleteMe( arcpool );
-    }
-}
-
-/*----------------------------------------------------------------------------
- * tessellate - tessellate all Bezier arcs in a bin
- * 		   1) only accepts linear Bezier arcs as input 
- * 		   2) the Bezier arcs are stored in the pwlArc structure
- * 		   3) only vertical or horizontal lines work
- * 		-- should 
- * 		   1) represent Bezier arcs in BezierArc structure
- * 		      (this requires a multitude of changes to the code)
- * 		   2) accept high degree Bezier arcs (hard)
- * 		   3) map the curve onto the surface to determine tessellation
- * 		   4) work for curves of arbitrary geometry
- *----------------------------------------------------------------------------
- */
-
-
-void
-Subdivider::tessellate( Bin& bin, REAL rrate, REAL trate, REAL lrate, REAL brate )
-{
-    for( Arc_ptr jarc=bin.firstarc(); jarc; jarc=bin.nextarc() ) {
-	if( jarc->isbezier( ) ) {
-    	    assert( jarc->pwlArc->npts == 2 );	
-	    TrimVertex  *pts = jarc->pwlArc->pts;
-    	    REAL s1 = pts[0].param[0];
-    	    REAL t1 = pts[0].param[1];
-    	    REAL s2 = pts[1].param[0];
-    	    REAL t2 = pts[1].param[1];
-	    
-    	    jarc->pwlArc->deleteMe( pwlarcpool ); jarc->pwlArc = 0;
-	    
-	    switch( jarc->getside() ) {
-		case arc_left:
-		    assert( s1 == s2 );
-		    arctessellator.pwl_left( jarc, s1, t1, t2, lrate );
-		    break;
-		case arc_right:
-		    assert( s1 == s2 );
-		    arctessellator.pwl_right( jarc, s1, t1, t2, rrate );
-		    break;
-		case arc_top:
-		    assert( t1 == t2 );
-		    arctessellator.pwl_top( jarc, t1, s1, s2, trate );
-		    break;
-		case arc_bottom:
-		    assert( t1 == t2 );
-		    arctessellator.pwl_bottom( jarc, t1, s1, s2, brate );
-		    break;
-		case arc_none:
-		    (void) abort();
-		    break;
-	    }
-	    assert( ! jarc->isbezier() );
-    	    assert( jarc->check() != 0 );
-	}
-    }
-}
diff --git a/src/glu/sgi/libnurbs/internals/subdivider.h b/src/glu/sgi/libnurbs/internals/subdivider.h
deleted file mode 100644
index 4d539518186..00000000000
--- a/src/glu/sgi/libnurbs/internals/subdivider.h
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * subdivider.h
- *
- */
-
-#ifndef __glusubdivider_h_
-#define __glusubdivider_h_
-
-#include "mysetjmp.h"
-#include "bin.h"
-#include "flist.h"
-#include "slicer.h"
-#include "arctess.h"
-#include "trimvertex.h"
-#include "trimvertpool.h"
-
-class Arc;
-class Pool;
-class Renderhints;
-class Quilt;
-class Patchlist;
-class Curvelist;
-struct JumpBuffer;
-
-class Subdivider {
-public:
-			Subdivider( Renderhints&, Backend& );
-			~Subdivider( void );
-    void		clear( void );
-
-    void		beginTrims( void ) {}
-    void		beginLoop( void );
-    void		addArc( REAL *, Quilt *, long );
-    void		addArc( int, TrimVertex *, long );
-    void		endLoop( void ) {}
-    void		endTrims( void ) {}
-
-    void		beginQuilts( void );
-    void		addQuilt( Quilt * );
-    void		endQuilts( void ) {}
-
-    void		drawCurves( void );
-    void		drawSurfaces( long );
-
-    int			ccwTurn_sl( Arc_ptr, Arc_ptr  );
-    int			ccwTurn_sr( Arc_ptr , Arc_ptr   );
-    int			ccwTurn_tl( Arc_ptr , Arc_ptr  );
-    int			ccwTurn_tr( Arc_ptr , Arc_ptr  );
-
-    void		setJumpbuffer( JumpBuffer * );
-
-    void set_domain_distance_u_rate(REAL u_rate)
-      {
-	domain_distance_u_rate = u_rate;
-      }
-    void set_domain_distance_v_rate(REAL v_rate)
-      {
-	domain_distance_v_rate = v_rate;
-      }
-    void set_is_domain_distance_sampling(int flag)
-      {
-	is_domain_distance_sampling = flag;
-      }
-
-private:
-    void		classify_headonleft_s( Bin &, Bin &, Bin &, REAL );
-    void		classify_tailonleft_s( Bin &, Bin &, Bin &, REAL );
-    void		classify_headonright_s( Bin &, Bin &, Bin &, REAL );
-    void		classify_tailonright_s( Bin &, Bin &, Bin &, REAL );
-    void		classify_headonleft_t( Bin &, Bin &, Bin &, REAL );
-    void		classify_tailonleft_t( Bin &, Bin &, Bin &, REAL );
-    void		classify_headonright_t( Bin &, Bin &, Bin &, REAL );
-    void		classify_tailonright_t( Bin &, Bin &, Bin &, REAL );
-
-    enum dir 		{ down, same, up, none };
-    void		tessellate( Arc_ptr, REAL );
-    void		monotonize( Arc_ptr , Bin & );
-    int			isMonotone( Arc_ptr  );
-    int			decompose( Bin &, REAL );
-
-
-    Slicer		slicer;
-    ArcTessellator	arctessellator;
-    Pool		arcpool;
-    Pool		bezierarcpool;
-    Pool		pwlarcpool;
-    TrimVertexPool	trimvertexpool;
-
-    JumpBuffer*		jumpbuffer;
-    Renderhints&	renderhints;
-    Backend&		backend;
-
-    Bin			initialbin;
-    Arc_ptr		pjarc;
-    int 		s_index;
-    int			t_index;
-    Quilt *		qlist;
-    Flist		spbrkpts;
-    Flist		tpbrkpts;
-    Flist		smbrkpts;
-    Flist		tmbrkpts;
-    REAL	 	stepsizes[4];
-    int			showDegenerate;
-    int			isArcTypeBezier;
-
-    void		samplingSplit( Curvelist&, int );
-
-    void		subdivideInS( Bin&  );
-    void		splitInS( Bin&, int, int );
-    void		splitInT( Bin&, int, int );
-    void		samplingSplit( Bin&, Patchlist&, int, int );
-    void		nonSamplingSplit( Bin&, Patchlist&, int, int );
-    void		tessellation( Bin&, Patchlist& );
-    void		monosplitInS( Bin&, int, int );
-    void		monosplitInT( Bin&, int, int );
-
-    void		outline( Bin & );
-    void		freejarcs( Bin & );
-    void		render( Bin & );
-    void		split( Bin &, Bin &, Bin &, int, REAL );
-    void		tessellate( Bin &, REAL, REAL, REAL, REAL );
-
-    inline void		setDegenerate( void ) { showDegenerate = 1; }
-    inline void		setNonDegenerate( void ) { showDegenerate = 0; }
-    inline int		showingDegenerate( void ) { return showDegenerate; }
-    inline void		setArcTypeBezier( void ) { isArcTypeBezier = 1; }
-    inline void		setArcTypePwl( void ) { isArcTypeBezier = 0; }
-    inline int		isBezierArcType( void ) { return isArcTypeBezier; }
-
-    void		makeBorderTrim( const REAL *, const REAL * );
-    void		split( Bin &, int, const REAL *, int, int );
-    void		partition( Bin &, Bin &, Bin &, Bin &, Bin &, int, REAL );
-    void		findIrregularS( Bin & );
-    void		findIrregularT( Bin & );
-
-
-    inline int		bbox( TrimVertex *, TrimVertex *, TrimVertex *, int );
-    static int		bbox( REAL, REAL, REAL, REAL, REAL, REAL );
-    static int		ccw( TrimVertex *, TrimVertex *, TrimVertex * );
-    void		join_s( Bin &, Bin &, Arc_ptr, Arc_ptr  );
-    void		join_t( Bin &, Bin &, Arc_ptr , Arc_ptr  );
-    int			arc_split( Arc_ptr , int, REAL, int );
-    void		check_s( Arc_ptr , Arc_ptr  );
-    void		check_t( Arc_ptr , Arc_ptr  );
-    inline void		link( Arc_ptr , Arc_ptr , Arc_ptr , Arc_ptr  );
-    inline void		simple_link( Arc_ptr , Arc_ptr  );
-
-   Bin*                 makePatchBoundary( const REAL *from, const REAL *to );
-
-   /*in domain distance method, the tessellation is controled by two numbers:
-    *GLU_U_STEP: number of u-segments per unit u length of domain
-    *GLU_V_STEP: number of v-segments per unit v length of domain
-    *These two numbers are normally stored in mapdesc->maxs(t)rate.
-    *I (ZL) put these two numbers here so that I can optimize the untrimmed 
-    *case in the case of domain distance sampling.
-    *These two numbers are set by set_domain_distance_u_rate() and ..._v_..().
-    */
-   REAL domain_distance_u_rate;
-   REAL domain_distance_v_rate;
-   int is_domain_distance_sampling;
-};
-
-inline void
-Subdivider::beginLoop( void ) 
-{
-    pjarc = 0;
-}
-
-
-#endif /* __glusubdivider_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/tobezier.cc b/src/glu/sgi/libnurbs/internals/tobezier.cc
deleted file mode 100644
index 531f26bc783..00000000000
--- a/src/glu/sgi/libnurbs/internals/tobezier.cc
+++ /dev/null
@@ -1,687 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/* 
- * tobezier.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "mystring.h"
-#include "quilt.h"
-#include "knotvector.h"
-
-/* local type definitions */
-struct Breakpt {		/* breakpoints	*/
-    Knot		value;		/* value	*/
-    int			multi;		/* multiplicity	*/
-    int			def;		/* deficit */
-};
-
-struct Knotspec {		/* knotvector format */
-    long		order;		/* order of spline  */
-    Knot_ptr		inkbegin;	/* input knot sequence */
-    Knot_ptr		inkend;		/* location after last knot */
-    Knot_ptr		outkbegin;	/* in-process knot subsequence */
-    Knot_ptr		outkend;	/* location after last knot */
-    Knot_ptr		kleft;		/* */
-    Knot_ptr		kright;		/* */
-    Knot_ptr		kfirst;		/* */
-    Knot_ptr		klast;		/* */
-    Knot_ptr		sbegin;		/* conversion factor values */
-    Breakpt *		bbegin;		/* in-process breakpoints */
-    Breakpt *		bend;		/* last breakpoint */
-    int			ncoords;	/* coordinates per control point */
-    int			prestride;	/* stride between input points */
-    int			poststride;	/* stride between output points	*/
-    int 		preoffset;	/* scaled point offset	*/
-    int 		postoffset;	/* scaled point offset	*/
-    int 		prewidth;	/* width of dimension	*/
-    int 		postwidth;	/* width of dimension	*/
-    int 		istransformed;	/* was dimension transformed */
-    Knotspec *		next;   	/* next knotspec */
-    Knotspec *		kspectotrans;   /* knotspec in transformation direction */
-
-			Knotspec( void );
-			~Knotspec( void );
-    void		factors( void );
-    void		insert( REAL * );
-    void		preselect();
-    void		select( void );
-    void		copy( INREAL *, REAL * );
-    void		breakpoints( void );
-    void		knots( void );
-    void		transform( REAL * );
-    void		showpts( REAL * );
-    
-    void		pt_io_copy( REAL *, INREAL * );
-    void		pt_oo_copy( REAL *, REAL * );
-    void		pt_oo_sum( REAL*, REAL*, REAL*, Knot, Knot );
-};
-
-struct Splinespec {		/* a non-uniform tensor element */
-			Splinespec( int );
-                        ~Splinespec(void);
-    Knotspec		*kspec;	/* format of each param. dir. */
-    int			dim;		/* domain dimension */
-    REAL *		outcpts;	/* Bezier control points */
-
-    void		kspecinit( Knotvector & );
-    void		kspecinit( Knotvector &, Knotvector & );
-    void		select( void );
-    void		layout( long );
-    void		setupquilt( Quilt_ptr );
-    void		copy( INREAL * );
-    void		transform( void );
-};
-
-/*-----------------------------------------------------------------------------
- * Quilt::toBezier - convert from NURBS to rational Bezier 
- *-----------------------------------------------------------------------------
- */
-
-void
-Quilt::toBezier( 
-    Knotvector& knotvector,	/* a knot vector */
-    INREAL *ctlpts,		/* input contol points */
-    long ncoords )		/* number of coordinates per control point */
-{
-    Splinespec spline( 1 );
-    spline.kspecinit( knotvector );
-    spline.select();
-    spline.layout( ncoords );
-    spline.setupquilt( this );
-    spline.copy( ctlpts );
-    spline.transform();
-}
-
-void
-Quilt::toBezier( 
-    Knotvector& sknotvector,	/* a knot vector */
-    Knotvector& tknotvector,	/* a knot vector */
-    INREAL *ctlpts,		/* input contol points */
-    long ncoords )		/* number of coordinates per control point */
-{
-    Splinespec spline( 2 );
-    spline.kspecinit( sknotvector, tknotvector );
-    spline.select();
-    spline.layout( ncoords );
-    spline.setupquilt( this );
-    spline.copy( ctlpts );
-    spline.transform();
-}
-Splinespec::Splinespec( int dimen )
-{
-    dim = dimen;
-}
-
-Splinespec::~Splinespec( void )
-{
-    /* Note: do NOT delete 'outcpts' here since its address (not contents)
-     * is copied in 'cpts' in this file in function Splinespec::setupquilt().
-     * This block of memory will eventually be deleted in file quilt.c++ in
-     * function Quilt::deleteMe() through 'cpts' so do NOT delete it here!
-     */	
-    Knotspec *ktrav= kspec;         //start at beginning of list 
-    while (ktrav != 0) {            //any items to delete? 
-       Knotspec *deleteThis= ktrav; //remember to delete this 
-       ktrav= ktrav->next;          //go to next item if any
-       delete deleteThis;           //delete it
-    }	
-} /* ~Splinespec() */
-
-/*-----------------------------------------------------------------------------
- * Splinespec::kspecinit - initialize Splinespec structure
- *
- * Client: Quilt::toBezier
- *-----------------------------------------------------------------------------
- */
-
-void
-Splinespec::kspecinit( Knotvector& knotvector )
-{
-    kspec = new Knotspec;
-    kspec->inkbegin = knotvector.knotlist;
-    kspec->inkend = knotvector.knotlist + knotvector.knotcount;
-    kspec->prestride = (int) knotvector.stride; 
-    kspec->order = knotvector.order;
-    kspec->next = NULL;
-}
-
-void
-Splinespec::kspecinit( Knotvector& sknotvector, Knotvector& tknotvector )
-{
-    kspec = new Knotspec;
-    Knotspec *tkspec = new Knotspec;
-
-    kspec->inkbegin = sknotvector.knotlist;
-    kspec->inkend = sknotvector.knotlist + sknotvector.knotcount;
-    kspec->prestride = (int) sknotvector.stride; 
-    kspec->order = sknotvector.order;
-    kspec->next = tkspec;
-
-    tkspec->inkbegin = tknotvector.knotlist;
-    tkspec->inkend = tknotvector.knotlist + tknotvector.knotcount;
-    tkspec->prestride = (int) tknotvector.stride; 
-    tkspec->order = tknotvector.order;
-    tkspec->next = NULL;
-}
-
-
-/*-----------------------------------------------------------------------------
- * Splinespec::select - select the subsegments to copy
- *
- * Client: gl_quilt_to_bezier	
- *-----------------------------------------------------------------------------
- */
-
-void
-Splinespec::select( )
-{
-    for( Knotspec *knotspec = kspec; knotspec; knotspec = knotspec->next ) {
-	knotspec->preselect();
-	knotspec->select();
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * Splinespec::layout - 
- *
- * Client: gl_quilt_to_bezier	
- *-----------------------------------------------------------------------------
- */
-
-void
-Splinespec::layout( long ncoords )
-{
-
-    long stride = ncoords;
-    for( Knotspec *knotspec = kspec; knotspec; knotspec=knotspec->next ) {
-	knotspec->poststride = (int) stride;
-	stride *= ((knotspec->bend-knotspec->bbegin)*knotspec->order + knotspec->postoffset);
-        knotspec->preoffset  *= knotspec->prestride;
-	knotspec->prewidth  *= knotspec->poststride;
-	knotspec->postwidth *= knotspec->poststride;
-	knotspec->postoffset *= knotspec->poststride;
-        knotspec->ncoords = (int) ncoords;
-    }
-    outcpts = new REAL[stride];
-    assert( outcpts != 0 );  
-}
-
-/*-----------------------------------------------------------------------------
- * Splinespec::copy - copy the control points of current subobject
- *
- * Client: gl_quilt_to_bezier
- *-----------------------------------------------------------------------------
- */
-
-void
-Splinespec::copy( INREAL *incpts )
-{
-    kspec->copy( incpts, outcpts );
-}
-
-/*-----------------------------------------------------------------------------
- * Splinespec::setupquilt - assign all quilt variables from knotspec 
- *
- * Client: gl_quilt_to_bezier
- *-----------------------------------------------------------------------------
- */
-
-void
-Splinespec::setupquilt( Quilt_ptr quilt )
-{
-    Quiltspec_ptr qspec = quilt->qspec;
-    quilt->eqspec = qspec + dim;
-    for( Knotspec *knotspec = kspec; knotspec; knotspec=knotspec->next, qspec++ ) {
-	qspec->stride	= knotspec->poststride;
-	qspec->width	= knotspec->bend - knotspec->bbegin;
-	qspec->order	= (int) knotspec->order;
-	qspec->offset	= knotspec->postoffset;
-	qspec->index	= 0;
-	qspec->bdry[0]	= (knotspec->kleft == knotspec->kfirst) ? 1 : 0;
-	qspec->bdry[1]	= (knotspec->kright == knotspec->klast) ? 1 : 0;
-	qspec->breakpoints = new Knot[qspec->width+1];
-	Knot_ptr k =  qspec->breakpoints;
-	for( Breakpt *bk = knotspec->bbegin; bk <= knotspec->bend; bk++ )
-	    *(k++) = bk->value;
-    }
-    quilt->cpts = outcpts;
-    quilt->next = 0;
-}
-
-/*-----------------------------------------------------------------------------
- * Splinespec::transform - convert a spline to Bezier format
- *
- * Client: gl_quilt_to_bezier
- *-----------------------------------------------------------------------------
- */
-
-void
-Splinespec::transform( void )
-{
-    Knotspec *knotspec;
-    for( knotspec = kspec; knotspec; knotspec=knotspec->next )
-        knotspec->istransformed = 0;
-
-    for( knotspec = kspec; knotspec; knotspec=knotspec->next ) {
-	for( Knotspec *kspec2 = kspec; kspec2; kspec2=kspec2->next )
-	    kspec2->kspectotrans = knotspec;
-	kspec->transform( outcpts );
-	knotspec->istransformed = 1;
-    }
-}
-
-
-/*-----------------------------------------------------------------------------
- * Knotspec::Knotspec -  constuct a knot spec 
- *-----------------------------------------------------------------------------
- */
-
-Knotspec::Knotspec( void )
-{
-    bbegin = 0;
-    sbegin = 0;
-    outkbegin = 0;
-}
-
-/*-----------------------------------------------------------------------------
- * Knotspec::copy -  copy the control points along minor direction 
- *
- * Client: Splinespec::copy
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::copy( INREAL *inpt, REAL *outpt )
-{
-    inpt = (INREAL *) (((char *) inpt) + preoffset);
-
-    if( next ) {
-        for( REAL *lpt=outpt+prewidth; outpt != lpt; outpt += poststride ) {
-	    next->copy( inpt, outpt );
-	    inpt = (INREAL *) (((char *) inpt) + prestride);
-	}
-   } else {
-        for( REAL *lpt=outpt+prewidth; outpt != lpt; outpt += poststride ) {
-	    pt_io_copy( outpt, inpt );
-	    inpt = (INREAL *) (((char *) inpt) + prestride);
-	}
-     }
-}
-
-/*-----------------------------------------------------------------------------
- * Knotspec::showpts - print out points before transformation
- *
- * Client: Knotspec::select
- *-----------------------------------------------------------------------------
- */
-void
-Knotspec::showpts( REAL *outpt )
-{
-    if( next ) {
-        for( REAL *lpt=outpt+prewidth; outpt != lpt; outpt += poststride )
-	    next->showpts( outpt );
-    } else {
-        for( REAL *lpt=outpt+prewidth; outpt != lpt; outpt += poststride )
-	    _glu_dprintf(  "show %g %g %g\n", outpt[0], outpt[1], outpt[2] );
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * Knotspec::factors - precompute scale factors 	
- *	   - overwrites knot vector, actual new knot vector is NOT produced
- *
- * Client: Knotspec::select
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::factors( void )
-{
-    Knot *mid = (outkend - 1) - order + bend->multi;
-    Knot_ptr fptr = sbegin;
-
-    for( Breakpt *bpt = bend; bpt >= bbegin; bpt-- ) {
-    	mid -= bpt->multi;		// last knot less than knot to insert
-	int def = bpt->def - 1;		// number of knots to insert
-	if( def <= 0 ) continue;
-	Knot kv = bpt->value;		// knot to insert
-
-	Knot *kf = (mid-def) + (order-1);
-	for( Knot *kl = kf + def; kl != kf; kl-- ) {
-	    Knot *kh, *kt;
-	    for( kt=kl, kh=mid; kt != kf; kh--, kt-- ) 
-		*(fptr++) = (kv - *kh) / (*kt - *kh);
-	    *kl = kv;
-	}
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * Knotspec::insert - convert subobject in direction of kspec into Bezier
- *
- * Client: Knotspec::transform
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::insert( REAL *p )
-{
-    Knot_ptr fptr = sbegin;
-    REAL *srcpt = p + prewidth - poststride;
-    REAL *dstpt = p + postwidth + postoffset - poststride;
-    Breakpt *bpt = bend;
-
-   for( REAL *pend = srcpt - poststride*bpt->def; srcpt != pend; pend +=poststride ) {
-	REAL *p1 = srcpt;
-	for( REAL *p2 = srcpt-poststride; p2 != pend; p1 = p2, p2 -= poststride ) {
-	    pt_oo_sum( p1, p1, p2, *fptr, 1.0-*fptr );
-	    fptr++;
-	}
-    }
-
-    for( --bpt; bpt >= bbegin; bpt-- ) {
-
-	for( int multi = bpt->multi; multi > 0; multi-- ) {
-	    pt_oo_copy( dstpt, srcpt );
-	    dstpt -= poststride;
-	    srcpt -= poststride;	
-	}
-    
-	for( REAL *pend = srcpt - poststride*bpt->def; srcpt != pend; pend +=poststride, dstpt-=poststride ) {
-	    pt_oo_copy( dstpt, srcpt );
-	    REAL *p1 = srcpt;
-
-	    for( REAL *p2 = srcpt-poststride; p2 != pend; p1=p2, p2 -= poststride ) {
-		pt_oo_sum( p1, p1, p2, *fptr, 1.0-*fptr );
-		fptr++;
-	    }
-	}
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * Knotspec::preselect - initialize kspec for processing
- *
- * Client: Splinespec::select
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::preselect( void )
-{
-    Knot kval; 
-
-    /* position klast after last knot of "last" breakpoint */
-    for( klast = inkend - order, kval = *klast; klast != inkend; klast++ ) 
-	if( ! identical( *klast, kval ) ) break;
-
-    /* position kfirst after last knot of "first" breakpoint */
-    for( kfirst = inkbegin+order-1, kval= *kfirst;  kfirst != inkend; kfirst++ )
-	if( ! identical( *kfirst, kval ) ) break;
-
-    /* compute multiplicity of first breakpoint */
-    Knot_ptr k;
-    for( k  = kfirst - 1; k >= inkbegin; k-- ) 
-	if( ! identical( kval, *k ) ) break;    
-    k++;
-
-    /* allocate space for breakpoints -
-       use worst case estimate on number of breakpoints */
-
-    bbegin = new Breakpt[(klast - kfirst)+1];
-    /* record multiplicity and value of first breakpoint */
-    bbegin->multi = kfirst - k;
-    bbegin->value = kval;
-    bend = bbegin;
-
-    kleft = kright = kfirst;
-}
-
-
-/*-----------------------------------------------------------------------------
- * Knotspec::select - Knotspec::select segments and precompute scale factors
- *
- * Client: Splinespec::select
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::select( void )
-{
-    breakpoints();
-    knots();
-    factors();
-    
-    preoffset	= kleft - (inkbegin + order);
-    postwidth	= (int)((bend - bbegin) * order);
-    prewidth 	= (int)((outkend - outkbegin) - order);
-    postoffset  = (bbegin->def > 1) ? (bbegin->def-1) : 0;
-}
- 
-/*-----------------------------------------------------------------------------
- * Knotspec::breakpoints - compute breakpoints for knotspec
- *
- * Client: Knotspec::select
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::breakpoints( void )
-{
-    Breakpt *ubpt	= bbegin;
-    Breakpt *ubend	= bend;
-    long    nfactors  	= 0;
-
-    ubpt->value	= ubend->value;
-    ubpt->multi	= ubend->multi;
-
-    kleft = kright;
-
-    for( ; kright != klast; kright++ ) {
-        if ( identical(*kright,ubpt->value) ) {
-	    (ubpt->multi)++;
-	} else {
-    	    ubpt->def = (int) (order - ubpt->multi);
-    	    nfactors += (ubpt->def * (ubpt->def - 1)) / 2;
-	    (++ubpt)->value = *kright;
-	    ubpt->multi = 1;
-	}
-    }
-    ubpt->def = (int) (order - ubpt->multi);
-    nfactors += (ubpt->def * (ubpt->def - 1)) / 2;
-
-    bend = ubpt;
-
-    if( nfactors ) {	    
-        sbegin = new Knot[nfactors];
-    } else {
-	sbegin = NULL;
-    }
-}
-
-
-/*-----------------------------------------------------------------------------
- * Knotspec::knots - copy relevant subsequence of knots into temporary area
- *
- * Client: Knotspec::select
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::knots( void )
-{
-    Knot_ptr inkpt = kleft - order;
-    Knot_ptr inkend = kright  + bend->def;
-
-    /* allocate space for knots and factors */
-    outkbegin = new Knot[inkend-inkpt];
-    Knot_ptr outkpt;
-    for( outkpt = outkbegin; inkpt != inkend; inkpt++, outkpt++ ) 
-	*outkpt = *inkpt;
-
-    outkend = outkpt;
-}
-
-
-/*-----------------------------------------------------------------------------
- * Knotspec::transform -	convert a spline along a given direction 
- *
- * Client: Splienspec::transform
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::transform( REAL *p )
-{
-   if( next ) {
-	if( this == kspectotrans ) {
-	    next->transform( p );
-	} else {
-	    if( istransformed ) {
-		p += postoffset;
-		for( REAL *pend = p + postwidth; p != pend; p += poststride )
-		    next->transform( p );
-	    } else {
-		REAL *pend = p + prewidth;
-		for( ; p != pend; p += poststride )
-		    next->transform( p );
-	    }
-	}
-   } else {
-	if( this == kspectotrans ) {
-	    insert( p );
-	} else {
-	    if( istransformed ) {
-		p += postoffset;
-		for( REAL *pend = p + postwidth; p != pend; p += poststride )
-		    kspectotrans->insert( p );
-	    } else {
-		REAL *pend = p + prewidth;
-		for( ; p != pend; p += poststride )
-		    kspectotrans->insert( p );
-	    }
-	}
-   }
-}
-
-/*-----------------------------------------------------------------------------
- * Knotspec::~Knotspec - free space alocated for knotspec
- *-----------------------------------------------------------------------------
- */
-
-Knotspec::~Knotspec( void )
-{
-    if( bbegin ) delete[] bbegin;
-    if( sbegin ) delete[] sbegin;
-    if( outkbegin ) delete[] outkbegin;
-}
-
-
-/*-----------------------------------------------------------------------------
- * pt_io_copy - make internal copy of input cntrl pt. of x coords
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::pt_io_copy( REAL *topt, INREAL *frompt )
-{
-    switch( ncoords ) {
-    case 4:
-        topt[3] = (REAL) frompt[3];
-    case 3:
-        topt[2] = (REAL) frompt[2];
-    case 2:
-        topt[1] = (REAL) frompt[1];
-    case 1:
-        topt[0] = (REAL) frompt[0];
-	break;
-    default: {
-	    for( int i = 0; i < ncoords; i++ )
-		*topt++ = (REAL) *frompt++;
-	}
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * pt_oo_copy - make internal copy of internal cntrl pt. of x coords
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::pt_oo_copy( REAL *topt, REAL *frompt )
-{
-    switch( ncoords ) {
-    case 4:
-        topt[3] = frompt[3];
-    case 3:
-        topt[2] = frompt[2];
-    case 2:
-        topt[1] = frompt[1];
-    case 1:
-        topt[0] = frompt[0];
-	break;
-    default:
-	memcpy( topt, frompt, ncoords * sizeof( REAL ) );
-    }
-}
-
-/*-----------------------------------------------------------------------------
- * pt_oo_sum - compute affine combination of internal cntrl pts
- *-----------------------------------------------------------------------------
- */
-
-void
-Knotspec::pt_oo_sum( REAL *x, REAL *y, REAL *z, Knot a, Knot b )
-{
-    switch( ncoords ) {
-    case 4:
-        x[3] = a * y[3]  +  b * z[3];
-    case 3:
-        x[2] = a * y[2]  +  b * z[2];
-    case 2:
-        x[1] = a * y[1]  +  b * z[1];
-    case 1:
-        x[0] = a * y[0]  +  b * z[0];
-	break;
-    default: {
-          for( int i = 0; i < ncoords; i++ )
-              *x++ = a * *y++   +   b * *z++;
-    }
-    }
-}
diff --git a/src/glu/sgi/libnurbs/internals/trimline.cc b/src/glu/sgi/libnurbs/internals/trimline.cc
deleted file mode 100644
index 61f34cd38a0..00000000000
--- a/src/glu/sgi/libnurbs/internals/trimline.cc
+++ /dev/null
@@ -1,223 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * trimline.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "trimline.h"
-#include "backend.h"
-
-Trimline::Trimline()
-{
-    size = 0; pts = 0; numverts = 0;
-    tinterp = &t; binterp = &b; 
-}
-
-Trimline::~Trimline()
-{
-    if( pts ) delete[] pts; 
-}
-
-void 
-Trimline::init( TrimVertex *v )
-{
-    reset();
-    grow(1);
-    append(v);
-}
-
-inline void
-Trimline::grow( long npts )
-{
-    if( size < npts ) {
-	size = 2 * npts;
-	if( pts ) delete[] pts; 
-        pts = new TrimVertex_p[size];
-    }
-}
-
-inline void
-Trimline::append( TrimVertex *v )
-{
-    assert( numverts != size ); 
-    pts[numverts++] = v;
-}
-
-void
-Trimline::init( long npts, Arc_ptr jarc, long last )
-{
-    jarcl.init( jarc, 0, last );
-    grow( npts + 2 );
-}
-
-inline void
-Trimline::swap()
-{
-    TrimVertex *tmp=tinterp; 
-    tinterp=binterp; 
-    binterp=tmp;
-}
-
-void
-Trimline::getNextPt()
-{
-    *binterp = *jarcl.getnextpt();    
-}
-
-void 
-Trimline::getPrevPt()
-{
-    *binterp = *jarcl.getprevpt();
-}
-
-/*----------------------------------------------------------------------
- * getNextPts - make arrays of pointers to trim points on left and right
- *		hulls of trim strip.
- *----------------------------------------------------------------------
- */
-void
-Trimline::getNextPts( REAL vval, Backend& backend )
-{
-    reset(); swap(); append( tinterp );
-    assert( tinterp->param[1] >= vval );
-
-    register TrimVertex *p;
-    for( p=jarcl.getnextpt() ; p->param[1] >= vval; p=jarcl.getnextpt() ) {
-	append( p ); 
-    }
-
-    /* compute and copy pointer to final point on left hull */
-    if( interpvert( last(), p, binterp, vval ) ) {
-	binterp->nuid = p->nuid;
-	backend.triangle( p, binterp, last() );
-        append( binterp );
-    }
-    jarcl.reverse();
-    (void) jarcl.getprevpt(); 	/* reset jarcl to proper position */
-    jarcl.reverse();
-}
-
-void 
-Trimline::getPrevPts( REAL vval, Backend& backend )
-{
-    reset(); swap(); append( tinterp );
-    assert( tinterp->param[1] >= vval );
-
-    register TrimVertex *q;
-    for( q=jarcl.getprevpt(); q->param[1] >= vval; q=jarcl.getprevpt() ) {
-	append( q );
-    }
-
-    /* compute and copy pointer to final point on right hull */
-    if( interpvert( q, last(), binterp, vval ) ) {
-	binterp->nuid = q->nuid;
-	backend.triangle( last(), binterp, q );
-        append( binterp );
-    }
-    jarcl.reverse();
-    (void) jarcl.getnextpt();  /* reset jarcl to proper position */
-    jarcl.reverse();
-}
-
-void
-Trimline::getNextPts( Arc_ptr botarc )
-{
-    reset(); swap(); append( tinterp );
-
-#ifndef NDEBUG
-    PwlArc *lastpwl = botarc->prev->pwlArc;
-    TrimVertex *lastpt1 = &lastpwl->pts[lastpwl->npts-1];
-#endif
-    TrimVertex *lastpt2 = botarc->pwlArc->pts;
-    register TrimVertex *p = jarcl.getnextpt();
-    for( append( p ); p != lastpt2; append( p ) ) {
-	assert( p != lastpt1 );
-	p = jarcl.getnextpt();
-    }
-}
-
-void
-Trimline::getPrevPts( Arc_ptr botarc )
-{
-    reset();  swap(); append( tinterp );
-
-    PwlArc *lastpwl = botarc->prev->pwlArc;
-    TrimVertex *lastpt1 = &lastpwl->pts[lastpwl->npts-1];
-#ifndef NDEBUG
-    TrimVertex *lastpt2 = botarc->pwlArc->pts;
-#endif
-
-    register TrimVertex *q =  jarcl.getprevpt();
-    for( append( q ); q != lastpt1; append( q ) ) {
-	assert( q != lastpt2 );
-	q = jarcl.getprevpt();
-    }
-}
-
-
-long
-Trimline::interpvert( TrimVertex *a, TrimVertex *b, TrimVertex *c, REAL vval )
-{
-    REAL denom = a->param[1] - b->param[1];
-
-    if(denom != 0) {
-	if( vval == a->param[1] ) {
-	    c->param[0] = a->param[0]; 
-	    c->param[1] = a->param[1];
-	    c->nuid = a->nuid;
-	    return 0;
-	} else if( vval == b->param[1] ) {
-	    c->param[0] = b->param[0]; 
-	    c->param[1] = b->param[1];
-	    c->nuid = b->nuid;
-	    return 0;
-	} else {
-	    REAL r = (a->param[1] - vval)/denom;
-	    c->param[0] =  a->param[0] - r * (a->param[0] - b->param[0]);
-	    c->param[1] = vval;
-	    return 1;
-	}
-    } else {
-        c->param[0] = a->param[0]; 
-        c->param[1] = a->param[1];
-	c->nuid = a->nuid;
-	return 0;
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/trimline.h b/src/glu/sgi/libnurbs/internals/trimline.h
deleted file mode 100644
index ecc884284cc..00000000000
--- a/src/glu/sgi/libnurbs/internals/trimline.h
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * trimline.h
- *
- */
-
-#ifndef __glutrimline_h_
-#define __glutrimline_h_
-
-class Arc;
-class Backend;
-
-#include "trimvertex.h"
-#include "jarcloc.h"
-
-
-class Trimline {
-private:
-    TrimVertex**	pts; 	
-    long 		numverts;
-    long		i;
-    long		size;
-    Jarcloc		jarcl;
-    TrimVertex		t, b;
-    TrimVertex 		*tinterp, *binterp;
-    void		reset( void ) { numverts = 0; }
-    inline void		grow( long );
-    inline void		swap( void );
-    inline void		append( TrimVertex * );
-    static long		interpvert( TrimVertex *, TrimVertex *, TrimVertex *, REAL );
-
-
-
-public:
-			Trimline();
-			~Trimline();
-    void		init( TrimVertex * );
-    void		init( long, Arc_ptr, long );
-    void		getNextPt( void );
-    void		getPrevPt( void );
-    void		getNextPts( REAL, Backend & );
-    void		getPrevPts( REAL, Backend & );
-    void		getNextPts( Arc_ptr );
-    void		getPrevPts( Arc_ptr );
-    inline TrimVertex *	next( void );
-    inline TrimVertex *	prev( void ); 
-    inline TrimVertex *	first( void );
-    inline TrimVertex *	last( void );
-};
-
-inline TrimVertex *
-Trimline::next( void ) 
-{
-    if( i < numverts) return pts[i++]; else return 0; 
-} 
-
-inline TrimVertex *
-Trimline::prev( void ) 
-{
-    if( i >= 0 ) return pts[i--]; else return 0; 
-} 
-
-inline TrimVertex *
-Trimline::first( void ) 
-{
-    i = 0; return pts[i]; 
-}
-
-inline TrimVertex *
-Trimline::last( void ) 
-{
-    i = numverts; return pts[--i]; 
-}  
-#endif /* __glutrimline_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/trimregion.cc b/src/glu/sgi/libnurbs/internals/trimregion.cc
deleted file mode 100644
index 4aeb5eeac16..00000000000
--- a/src/glu/sgi/libnurbs/internals/trimregion.cc
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * trimregion.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "trimregion.h"
-
-TrimRegion::TrimRegion( void )
-{
-}
-
-void
-TrimRegion::setDu( REAL du )
-{
-    oneOverDu = 1.0/du;
-}
-
-void
-TrimRegion::init( long npts, Arc_ptr extrema )
-{
-    left.init( npts, extrema, extrema->pwlArc->npts - 1 ); 
-    left.getNextPt();
-
-    right.init( npts, extrema, 0 ); 
-    right.getPrevPt();
-}
-
-void
-TrimRegion::getPts( Arc_ptr extrema )
-{
-    left.getNextPts( extrema );
-    right.getPrevPts( extrema );
-}
-
-void
-TrimRegion::getPts( Backend &backend )
-{
-    left.getNextPts( bot.vval, backend );
-    right.getPrevPts( bot.vval, backend );
-}
-
-void 
-TrimRegion::getGridExtent( void )
-{
-    getGridExtent( left.last(), right.last() );
-}
-
-void
-TrimRegion::getGridExtent( TrimVertex *l, TrimVertex *r )
-{
-    bot.ustart = (long) ((l->param[0] - uarray.uarray[0])*oneOverDu);
-    if( l->param[0] >= uarray.uarray[bot.ustart] ) bot.ustart++;
-//  if( l->param[0] > uarray.uarray[bot.ustart] ) bot.ustart++;
-    assert( l->param[0] <= uarray.uarray[bot.ustart] );
-    assert( l->param[0] >= uarray.uarray[bot.ustart-1] );
-
-    bot.uend = (long) ((r->param[0] - uarray.uarray[0])*oneOverDu);
-    if( uarray.uarray[bot.uend] >= r->param[0] ) bot.uend--;
-//  if( uarray.uarray[bot.uend] > r->param[0] ) bot.uend--;
-    assert( r->param[0] >= uarray.uarray[bot.uend] );
-    assert( r->param[0] <= uarray.uarray[bot.uend+1] );
-}
-
-int
-TrimRegion::canTile( void )
-{
-    TrimVertex *lf = left.first();
-    TrimVertex *ll = left.last();
-    TrimVertex *l = ( ll->param[0] > lf->param[0] ) ? ll : lf; 
-
-    TrimVertex *rf = right.first();
-    TrimVertex *rl = right.last();
-    TrimVertex *r = ( rl->param[0] < rf->param[0] ) ? rl : rf;
-    return (l->param[0] <= r->param[0]) ? 1 : 0;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/trimregion.h b/src/glu/sgi/libnurbs/internals/trimregion.h
deleted file mode 100644
index ee15d7b9888..00000000000
--- a/src/glu/sgi/libnurbs/internals/trimregion.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * trimregion.h
- *
- */
-
-#ifndef __glutrimregion_h_
-#define __glutrimregion_h_
-
-#include "trimline.h"
-#include "gridline.h"
-#include "uarray.h"
-
-class Arc;
-class Backend;
-
-class TrimRegion {
-public:
-			TrimRegion();
-    Trimline		left;
-    Trimline		right;
-    Gridline		top;
-    Gridline		bot;
-    Uarray		uarray;
-
-    void		init( REAL );
-    void		advance( REAL, REAL, REAL );
-    void		setDu( REAL );
-    void		init( long, Arc_ptr );
-    void		getPts( Arc_ptr );
-    void		getPts( Backend & );
-    void		getGridExtent( TrimVertex *, TrimVertex * );
-    void		getGridExtent( void );
-    int			canTile( void );
-private:
-    REAL		oneOverDu;
-};
-
-inline void
-TrimRegion::init( REAL vval ) 
-{
-    bot.vval = vval;
-}
-
-inline void
-TrimRegion::advance( REAL topVindex, REAL botVindex, REAL botVval )
-{
-    top.vindex	= (long) topVindex;
-    bot.vindex	= (long) botVindex;
-    top.vval	= bot.vval;
-    bot.vval	= botVval;
-    top.ustart	= bot.ustart;
-    top.uend	= bot.uend;
-}
-#endif /* __glutrimregion_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/trimvertex.h b/src/glu/sgi/libnurbs/internals/trimvertex.h
deleted file mode 100644
index 2780b764a54..00000000000
--- a/src/glu/sgi/libnurbs/internals/trimvertex.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * trimvertex.h
- *
- */
-
-#ifndef __glutrimvertex_h_
-#define __glutrimvertex_h_
-
-#include "types.h"
-
-/*#define USE_OPTTT*/
-
-class TrimVertex { /* a vertex on a trim curve */
-public:
-    REAL		param[2];	/* parametric space coords */
-#ifdef USE_OPTTT
-    REAL                cache_point[4]; //only when USE_OPTTT is on in slicer.c++
-    REAL                cache_normal[3];
-#endif
-    long		nuid;
-};
-
-typedef class TrimVertex *TrimVertex_p;
-
-inline REAL  
-det3( TrimVertex *a, TrimVertex *b, TrimVertex *c ) 
-{         
-    return a->param[0] * (b->param[1]-c->param[1]) + 
-	   b->param[0] * (c->param[1]-a->param[1]) + 
-	   c->param[0] * (a->param[1]-b->param[1]);
-}
-
-#endif /* __glutrimvertex_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/trimvertpool.cc b/src/glu/sgi/libnurbs/internals/trimvertpool.cc
deleted file mode 100644
index 3e5bd703806..00000000000
--- a/src/glu/sgi/libnurbs/internals/trimvertpool.cc
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * trimvertexpool.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "mystring.h"
-#include "trimvertex.h"
-#include "trimvertpool.h"
-#include "bufpool.h"
-
-/*----------------------------------------------------------------------------
- * TrimVertexPool::TrimVertexPool 
- *----------------------------------------------------------------------------
- */
-TrimVertexPool::TrimVertexPool( void )
-	: pool( sizeof(TrimVertex)*3, 32, "Threevertspool" )
-{
-    // initialize array of pointers to vertex lists
-    nextvlistslot = 0;
-    vlistsize = INIT_VERTLISTSIZE;
-    vlist = new TrimVertex_p[vlistsize];
-}
-
-/*----------------------------------------------------------------------------
- * TrimVertexPool::~TrimVertexPool 
- *----------------------------------------------------------------------------
- */
-TrimVertexPool::~TrimVertexPool( void )
-{
-    // free all arrays of TrimVertices vertices
-    while( nextvlistslot ) {
-	delete [] vlist[--nextvlistslot];
-    }
-
-    // reallocate space for array of pointers to vertex lists
-    if( vlist ) delete[] vlist;
-}
-
-/*----------------------------------------------------------------------------
- * TrimVertexPool::clear 
- *----------------------------------------------------------------------------
- */
-void
-TrimVertexPool::clear( void )
-{
-    // reinitialize pool of 3 vertex arrays    
-    pool.clear();
-
-    // free all arrays of TrimVertices vertices
-    while( nextvlistslot ) {
-	delete [] vlist[--nextvlistslot];
-	vlist[nextvlistslot] = 0;
-    }
-
-    // reallocate space for array of pointers to vertex lists
-    if( vlist ) delete[] vlist;
-    vlist = new TrimVertex_p[vlistsize];
-}
-
-
-/*----------------------------------------------------------------------------
- * TrimVertexPool::get - allocate a vertex list
- *----------------------------------------------------------------------------
- */
-TrimVertex *
-TrimVertexPool::get( int n )
-{
-    TrimVertex	*v;
-    if( n == 3 ) {
-	v = (TrimVertex *) pool.new_buffer();
-    } else {
-        if( nextvlistslot == vlistsize ) {
-	    vlistsize *= 2;
-	    TrimVertex_p *nvlist = new TrimVertex_p[vlistsize];
-	    memcpy( nvlist, vlist, nextvlistslot * sizeof(TrimVertex_p) );
-	    if( vlist ) delete[] vlist;
-	    vlist = nvlist;
-        }
-        v = vlist[nextvlistslot++] = new TrimVertex[n];
-    }
-    return v;
-}
diff --git a/src/glu/sgi/libnurbs/internals/trimvertpool.h b/src/glu/sgi/libnurbs/internals/trimvertpool.h
deleted file mode 100644
index ebd3c04b1f1..00000000000
--- a/src/glu/sgi/libnurbs/internals/trimvertpool.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * trimvertexpool.h
- *
- */
-
-#ifndef __glutrimvertpool_h_
-#define __glutrimvertpool_h_
-
-#include "bufpool.h"
-
-class TrimVertex;
-
-#define INIT_VERTLISTSIZE  200
-
-class TrimVertexPool {
-public:
-    			TrimVertexPool( void );
-    			~TrimVertexPool( void );
-    void		clear( void );
-    TrimVertex *	get( int );
-private:
-    Pool		pool;
-    TrimVertex **	vlist;
-    int			nextvlistslot;
-    int			vlistsize;
-};
-#endif /* __glutrimvertpool_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/types.h b/src/glu/sgi/libnurbs/internals/types.h
deleted file mode 100644
index 8b59625cff5..00000000000
--- a/src/glu/sgi/libnurbs/internals/types.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * types.h
- *
- */
-
-#ifndef __glutypes_h_
-#define __glutypes_h_
-
-//typedef double		INREAL;
-#define INREAL          float
-typedef float		REAL;
-typedef void 		(*Pfvv)( void );
-typedef void 		(*Pfvf)( float * );
-typedef int		(*cmpfunc)(const void *, const void *);
-typedef	REAL		Knot, *Knot_ptr;/* knot values */
-
-#endif /* __glutypes_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/uarray.cc b/src/glu/sgi/libnurbs/internals/uarray.cc
deleted file mode 100644
index 4b3329c0f27..00000000000
--- a/src/glu/sgi/libnurbs/internals/uarray.cc
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * uarray.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "uarray.h"
-#include "arc.h"
-
-Uarray::Uarray( void )
-{
-    uarray = 0;
-    size = 0;
-    ulines = 0;
-}
-
-Uarray::~Uarray( void )
-{
-    if( uarray ) delete[] uarray;		
-}
-
-long
-Uarray::init( REAL delta, Arc_ptr lo, Arc_ptr hi )
-{
-    ulines = (long) ((hi->tail()[0] - lo->tail()[0])/delta) + 3;
-    if( size < ulines ) {
-	size = ulines * 2;
-	if( uarray ) delete[] uarray;		
-	uarray = new REAL[size];
-	assert( uarray != 0);
-    }
-    uarray[0] = lo->tail()[0] - delta/2.0;
-    for( long i = 1 ; i != ulines; i++ )
-	uarray[i] = uarray[0] + i*delta;
-    return ulines;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/uarray.h b/src/glu/sgi/libnurbs/internals/uarray.h
deleted file mode 100644
index cc6fae1b754..00000000000
--- a/src/glu/sgi/libnurbs/internals/uarray.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * uarray.h
- *
- */
-
-#ifndef __gluuarray_h_
-#define __gluuarray_h_
-
-#include "types.h"
-
-class Arc;
-typedef class Arc *Arc_ptr; 
-
-class Uarray {
-private:
-    long		size;
-    long		ulines;
-public:
-			Uarray();
-			~Uarray();
-    long		init( REAL, Arc_ptr, Arc_ptr );
-    REAL *		uarray;
-};
-
-#endif /* __gluuarray_h_ */
diff --git a/src/glu/sgi/libnurbs/internals/varray.cc b/src/glu/sgi/libnurbs/internals/varray.cc
deleted file mode 100644
index 1cb235443ad..00000000000
--- a/src/glu/sgi/libnurbs/internals/varray.cc
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-*/
-
-/*
- * varray.c++
- *
- */
-
-#include "glimports.h"
-#include "myassert.h"
-#include "mystdio.h"
-#include "varray.h"
-#include "arc.h"
-#include "simplemath.h"         // glu_abs()
-
-#define TINY 0.0001
-inline long sgn( REAL x ) 
-{
-    return (x < -TINY) ? -1 :  ((x > TINY) ? 1 : 0 );
-}
-
-
-Varray::Varray( void )
-{
-    int i;
-
-    varray = 0;
-    size = 0;
-    numquads = 0;
-
-    for (i = 0; i < 1000; i++) {
-        vval[i] = 0;
-        voffset[i] = 0;
-    }
-}
-
-Varray::~Varray( void )
-{
-    if( varray ) delete[] varray; 
-}
-
-inline void
-Varray::update( Arc_ptr arc, long dir[2], REAL val )
-{
-    register long ds = sgn(arc->tail()[0] - arc->prev->tail()[0]);
-    register long dt = sgn(arc->tail()[1] - arc->prev->tail()[1]);
-
-    if( dir[0] != ds || dir[1] != dt ) {
-	dir[0] = ds;
-	dir[1] = dt;
-	append( val );
-    }
-}
-
-void
-Varray::grow( long guess )
-{
-    if( size < guess ) {
-	size = guess * 2;
-	if( varray ) delete[] varray; 
-	varray = new REAL[size];
-	assert( varray != 0 );
-    }
-}
-
-long
-Varray::init( REAL delta, Arc_ptr toparc, Arc_ptr botarc )
-{
-    Arc_ptr left = toparc->next;
-    Arc_ptr right = toparc;
-    long ldir[2], rdir[2];
-    
-    ldir[0] = sgn( left->tail()[0] - left->prev->tail()[0] );
-    ldir[1] = sgn( left->tail()[1] - left->prev->tail()[1] );
-    rdir[0] = sgn( right->tail()[0] - right->prev->tail()[0] );
-    rdir[1] = sgn( right->tail()[1] - right->prev->tail()[1] );
-
-    vval[0] = toparc->tail()[1];
-    numquads = 0;
-
-    while( 1 ) {
-	switch( sgn( left->tail()[1] - right->prev->tail()[1] ) ) {
-	case 1:
-	    left = left->next;
-	    update( left, ldir, left->prev->tail()[1] );
-	    break;
-	case -1: 
-	    right = right->prev;
-	    update( right, rdir, right->tail()[1] );
-	    break;
-	case 0:
-	    if( glu_abs(left->tail()[1] - botarc->tail()[1]) < TINY) goto end;
-            if( glu_abs(left->tail()[0]-right->prev->tail()[0]) < TINY &&
-                glu_abs(left->tail()[1]-right->prev->tail()[1]) < TINY) goto end;
-	    left = left->next;
-	    break;
- 	}
-    }
-
-end:
-    append( botarc->tail()[1] );
-
-    grow( ((long) ((vval[0] - vval[numquads])/delta)) + numquads + 2 );
-
-    long i, index = 0;
-    for( i=0; i<numquads; i++ ) {
-	voffset[i] = index;
-        varray[index++] = vval[i];
-	REAL dist = vval[i] - vval[i+1];
-	if( dist > delta ) {
-	    long steps = ((long) (dist/delta)) +1;
-	    float deltav = - dist / (REAL) steps;
-	    for( long j=1; j<steps; j++ ) 
-		varray[index++] = vval[i] + j * deltav; 
-	}
-    }
-    voffset[i] = index;
-    varray[index] = vval[i];
-    return index;
-}
-
diff --git a/src/glu/sgi/libnurbs/internals/varray.h b/src/glu/sgi/libnurbs/internals/varray.h
deleted file mode 100644
index b12ff837c85..00000000000
--- a/src/glu/sgi/libnurbs/internals/varray.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * varray.h
- *
- */
-
-#ifndef __gluvarray_h_
-#define __gluvarray_h_
-
-#include "types.h"
-
-class Arc;
-
-class Varray {
-public:
-			Varray();
-			~Varray();
-    long		init( REAL, Arc *, Arc * );
-    REAL *		varray;
-    REAL		vval[1000];
-    long		voffset[1000];
-    long 		numquads;
-
-private:
-    long		size;
-    inline void		update( Arc *, long[2], REAL );
-    void		grow( long );
-    inline void		append( REAL );
-};
-
-inline void
-Varray::append( REAL v ) 
-{
-    if( v != vval[numquads] )
-        vval[++numquads] = v; 
-}
-
-
-#endif /* __gluvarray_h_ */
diff --git a/src/glu/sgi/libnurbs/nurbtess/definitions.h b/src/glu/sgi/libnurbs/nurbtess/definitions.h
deleted file mode 100644
index 962921da10d..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/definitions.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _DEFINITIONS_H
-#define _DEFINITIONS_H
-
-typedef float Real;
-typedef int   Int;
-typedef Real Real2[2];
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/directedLine.cc b/src/glu/sgi/libnurbs/nurbtess/directedLine.cc
deleted file mode 100644
index d942db7287e..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/directedLine.cc
+++ /dev/null
@@ -1,860 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <math.h>
-#include "glimports.h"
-#include "zlassert.h"
-
-#include "quicksort.h"
-#include "directedLine.h"
-#include "polyDBG.h"
-
-#ifdef __WATCOMC__
-#pragma warning 726 10
-#endif
-
-//we must return the newLine
-directedLine* directedLine::deleteChain(directedLine* begin, directedLine* end)
-{
-  if(begin->head()[0] ==  end->tail()[0] &&
-     begin->head()[1] ==  end->tail()[1]
-     )
-    {
-      directedLine *ret = begin->prev;
-      begin->prev->next = end->next;
-      end->next->prev = begin->prev;
-      delete begin->sline;
-      delete end->sline;
-      delete begin;
-      delete end;
-
-      return ret;
-    }
-
-  directedLine* newLine;
-  sampledLine* sline = new sampledLine(begin->head(), end->tail());
-  newLine =  new directedLine(INCREASING, sline);
-  directedLine *p = begin->prev;
-  directedLine *n = end->next;
-  p->next = newLine;
-  n->prev = newLine;
-  newLine->prev = p;
-  newLine->next = n;
-
-  delete begin->sline;
-  delete end->sline;
-  delete begin;
-  delete end;
-  return newLine;
-}
-
-
-void directedLine::deleteSingleLine(directedLine* dline)
-{
-  //make sure that dline->prev->tail is the same as
-  //dline->next->head. This is for numerical erros.
-  //for example, if we delete a line which is almost degeneate
-  //within (epsilon), then we want to make that the polygon after deletion
-  //is still a valid polygon
-
-  dline->next->head()[0] =  dline->prev->tail()[0];
-  dline->next->head()[1] =  dline->prev->tail()[1];
-
-  dline->prev->next = dline->next;
-  dline->next->prev = dline->prev;
-
-  delete dline;
-
-}
-
-static Int myequal(Real a[2], Real b[2])
-{
-  /*
-  if(a[0]==b[0] && a[1] == b[1])
-    return 1;
-  else
-    return 0;
-    */
-
-
-  if(fabs(a[0]-b[0]) < 0.00001 &&
-     fabs(a[1]-b[1]) < 0.00001)
-    return 1;
-  else
-    return 0;
-
-}
-
-directedLine* directedLine::deleteDegenerateLines()
-{
-  //if there is only one edge or two edges, don't do anything
-  if(this->next == this)
-    return this;
-  if(this->next == this->prev)
-    return this;
-
-  //find a nondegenerate line
-  directedLine* temp;
-  directedLine* first = NULL;
-  if(! myequal(head(), tail()))
-    /*
-  if(head()[0] != tail()[0] ||
-  head()[1] != tail()[1])
-  */
-    first = this;
-  else
-    {
-      for(temp = this->next; temp != this; temp = temp->next)
-	{
-	  /*
-	  if(temp->head()[0] != temp->tail()[0] ||
-	     temp->head()[1] != temp->tail()[1])
-	     */
-	  if(! myequal(temp->head(), temp->tail()))
-	    {
-	      first = temp;
-	      break;
-	    }
-        
-	}
-    }
-
-  //if there are no non-degenerate lines, then we simply return NULL.
-  if(first == NULL)
-    {
-      deleteSinglePolygonWithSline();
-      return NULL;
-    }
-
-  directedLine* tempNext = NULL;
-  for(temp =first->next; temp != first; temp = tempNext)
-    {
-      tempNext = temp->getNext();
-/*
-      if(temp->head()[0] == temp->tail()[0] &&
-	 temp->head()[1] == temp->tail()[1])
-*/      
-
-      if(myequal(temp->head(), temp->tail()))
-	deleteSingleLine(temp);
-    }   
-  return first;
-}
-
-directedLine* directedLine::deleteDegenerateLinesAllPolygons()
-{
-  directedLine* temp;
-  directedLine *tempNext = NULL;
-  directedLine* ret= NULL;
-  directedLine* retEnd = NULL;
-  for(temp=this; temp != NULL; temp = tempNext)
-    {
-      tempNext = temp->nextPolygon;
-      temp->nextPolygon = NULL;
-      if(ret == NULL)
-	{
-	  ret = retEnd = temp->deleteDegenerateLines();
-        
-	}
-      else
-	{
-	  directedLine *newPolygon = temp->deleteDegenerateLines();
-	  if(newPolygon != NULL)
-	    {
-	  retEnd->nextPolygon = temp->deleteDegenerateLines();
-	  retEnd = retEnd->nextPolygon;
-	}
-    }
-    }
-  return ret;
-}
-
-directedLine* directedLine::cutIntersectionAllPoly(int &cutOccur)
-{
-  directedLine* temp;
-  directedLine *tempNext = NULL;
-  directedLine* ret= NULL;
-  directedLine* retEnd = NULL;
-  cutOccur = 0;
-  for(temp=this; temp != NULL; temp = tempNext)
-    {
-      int eachCutOccur=0;
-      tempNext = temp->nextPolygon;
-      temp->nextPolygon = NULL;
-      if(ret == NULL)
-	{
-
-	  ret = retEnd = DBG_cutIntersectionPoly(temp, eachCutOccur);
-	  if(eachCutOccur)
-	    cutOccur = 1;
-	}
-      else
-	{
-
-	  retEnd->nextPolygon = DBG_cutIntersectionPoly(temp, eachCutOccur);
-	  retEnd = retEnd->nextPolygon;
-	  if(eachCutOccur)
-	    cutOccur = 1;
-	}
-    }
-  return ret;
-}
-
-
-void directedLine::deleteSinglePolygonWithSline()
-{
-  directedLine *temp, *tempNext;
-  prev->next = NULL;
-  for(temp=this; temp != NULL; temp = tempNext)
-    {
-      tempNext = temp->next;
-      delete temp->sline;
-      delete temp;
-    }
-}
-
-void directedLine::deletePolygonListWithSline()
-{
-  directedLine *temp, *tempNext;
-  for(temp=this; temp != NULL; temp=tempNext)
-    {
-      tempNext = temp->nextPolygon;
-      temp->deleteSinglePolygonWithSline();
-    }
-}
-
-void directedLine::deleteSinglePolygon()
-{
-  directedLine *temp, *tempNext;
-  prev->next = NULL;
-  for(temp=this; temp != NULL; temp = tempNext)
-    {
-      tempNext = temp->next;
-      delete temp;
-    }
-}
-
-void directedLine::deletePolygonList()
-{
-  directedLine *temp, *tempNext;
-  for(temp=this; temp != NULL; temp=tempNext)
-    {
-      tempNext = temp->nextPolygon;
-      temp->deleteSinglePolygon();
-    }
-}
-
-
-/*a loop by itself*/
-directedLine::directedLine(short dir, sampledLine* sl)
-{
-  direction = dir;
-  sline = sl;
-  next = this;
-  prev = this;
-  nextPolygon = NULL;
-//  prevPolygon = NULL;
-  rootBit = 0;/*important to initilzae to 0 meaning not root yet*/
-
-  rootLink = NULL;
-
-}
-
-void directedLine::init(short dir, sampledLine* sl)
-{
-  direction = dir;
-  sline = sl;
-}
-
-directedLine::directedLine()
-{
-  next = this;
-  prev = this;
-  nextPolygon = NULL;
-  rootBit = 0;/*important to initilzae to 0 meaning not root yet*/
-  rootLink = NULL;
-  direction = INCREASING;
-  sline = NULL;
-}
-
-directedLine::~directedLine()
-{
-}
-
-Real* directedLine::head()
-{
-
-  return (direction==INCREASING)? (sline->get_points())[0] : (sline->get_points())[sline->get_npoints()-1];
-}
-
-/*inline*/ Real* directedLine::getVertex(Int i)
-{
-  return (direction==INCREASING)? (sline->get_points())[i] : (sline->get_points())[sline->get_npoints() - 1 -i];
-}
-
-Real* directedLine::tail()
-{
-  return (direction==DECREASING)? (sline->get_points())[0] : (sline->get_points())[sline->get_npoints()-1];
-}
-
- /*insert a new line between prev and this*/
-void directedLine::insert(directedLine* nl)
-{
-  nl->next = this;
-  nl->prev = prev;
-  prev->next = nl;
-  prev = nl;
-  nl->rootLink = this; /*assuming that 'this' is the root!!!*/
-}
-
-Int directedLine::numEdges()
-{
-  Int ret=0;
-  directedLine* temp;
-  if(next == this) return 1;
-
-  ret = 1;
-  for(temp = next; temp != this; temp = temp->next)
-    ret++;
-  return ret;
-}
-
-Int directedLine::numEdgesAllPolygons()
-{
-  Int ret=0;
-  directedLine* temp;
-  for(temp=this; temp!= NULL; temp=temp->nextPolygon)
-    {
-      ret += temp->numEdges();
-    }
-  return ret;
-}
-
-/*return 1 if the double linked list forms a polygon.
- */
-short directedLine::isPolygon()
-{
-  directedLine* temp;
-
-  /*a polygon contains at least 3 edges*/
-  if(numEdges() <=2) return 0;
-
-  /*check this edge*/
-  if(! isConnected()) return 0;
-
-  /*check all other edges*/
-  for(temp=next; temp != this; temp = temp->next){
-    if(!isConnected()) return 0;
-  }
-  return 1;
-}
-
-/*check if the head of this edge is connected to
- *the tail of the prev
- */
-short directedLine::isConnected()
-{
-  if( (head()[0] == prev->tail()[0]) && (head()[1] == prev->tail()[1]))
-    return 1;
-  else
-    return 0;
-}
-
-Int compV2InY(Real A[2], Real B[2])
-{
-  if(A[1] < B[1]) return -1;
-  if(A[1] == B[1] && A[0] < B[0]) return -1;
-  if(A[1] == B[1] && A[0] == B[0]) return 0;
-  return 1;
-}
-
-Int compV2InX(Real A[2], Real B[2])
-{
-  if(A[0] < B[0]) return -1;
-  if(A[0] == B[0] && A[1] < B[1]) return -1;
-  if(A[0] == B[0] && A[1] == B[1]) return 0;
-  return 1;
-}
-
-/*compare two vertices NOT lines!
- *A vertex is the head of a directed line.
- *(x_1, y_1) <= (x_2, y_2) if
- *either y_1 < y_2
- *or	 y_1 == y_2 && x_1 < x_2.
- *return -1 if this->head() <= nl->head(),
- *return  1 otherwise
- */
-Int directedLine::compInY(directedLine* nl)
-{
-  if(head()[1] < nl->head()[1]) return -1;
-  if(head()[1] == nl->head()[1] && head()[0] < nl->head()[0]) return -1;
-  return 1;
-}
-
-/*compare two vertices NOT lines!
- *A vertex is the head of a directed line.
- *(x_1, y_1) <= (x_2, y_2) if
- *either x_1 < x_2
- *or	 x_1 == x_2 && y_1 < y_2.
- *return -1 if this->head() <= nl->head(),
- *return  1 otherwise
- */
-Int directedLine::compInX(directedLine* nl)
-{
-  if(head()[0] < nl->head()[0]) return -1;
-  if(head()[0] == nl->head()[0] && head()[1] < nl->head()[1]) return -1;
-  return 1;
-}
-
-/*used by sort precedures
- */
-static Int compInY2(directedLine* v1, directedLine* v2)
-{
-  return v1->compInY(v2);
-}
-#ifdef NOT_USED
-static Int compInX(directedLine* v1, directedLine* v2)
-{
-  return v1->compInX(v2);
-}
-#endif
-
-/*sort all the vertices NOT the lines!
- *a vertex is the head of a directed line
- */
-directedLine** directedLine::sortAllPolygons()
-{
-  Int total_num_edges = 0;
-  directedLine** array = toArrayAllPolygons(total_num_edges);
-  quicksort( (void**)array, 0, total_num_edges-1, (Int (*)(void *, void *)) compInY2);
-
-  return array;
-}
-
-void directedLine::printSingle()
-{
-  if(direction == INCREASING)
-    printf("direction is INCREASING\n");
-  else
-    printf("direction is DECREASING\n");
-  printf("head=%f,%f)\n", head()[0], head()[1]);
-  sline->print();
-}
-
-/*print one polygon*/
-void directedLine::printList()
-{
-  directedLine* temp;
-  printSingle();
-  for(temp = next; temp!=this; temp=temp->next)
-    temp->printSingle();
-}
-
-/*print all the polygons*/
-void directedLine::printAllPolygons()
-{
-  directedLine *temp;
-  for(temp = this; temp!=NULL; temp = temp->nextPolygon)
-    {
-      printf("polygon:\n");
-      temp->printList();
-    }
-}
-
-/*insert this polygon into the head of the old polygon List*/
-directedLine* directedLine::insertPolygon(directedLine* oldList)
-{
-  /*this polygon is a root*/
-  setRootBit();
-  if(oldList == NULL) return this;
-  nextPolygon = oldList;
-/*  oldList->prevPolygon = this;*/
-  return this;
-}
-
-/*cutoff means delete. but we don't deallocate any space,
- *so we use cutoff instead of delete
- */
-directedLine* directedLine::cutoffPolygon(directedLine *p)
-{
-  directedLine* temp;
-  directedLine* prev_polygon  = NULL;
-  if(p == NULL) return this;
-
-  for(temp=this; temp != p; temp = temp->nextPolygon)
-    {
-      if(temp == NULL)
-	{
-	  fprintf(stderr, "in cutoffPolygon, not found\n");
-	  exit(1);
-	}
-      prev_polygon = temp;
-    }
-
-/*  prev_polygon = p->prevPolygon;*/
-
-  p->resetRootBit();
-  if(prev_polygon == NULL) /*this is the one to cutoff*/
-    return nextPolygon;
-  else {
-    prev_polygon->nextPolygon = p->nextPolygon;
-    return this;
-  }
-}
-
-Int directedLine::numPolygons()
-{
-  if(nextPolygon == NULL) return 1;
-  else return 1+nextPolygon->numPolygons();
-}
-
-
-/*let  array[index ...] denote
- *all the edges in this polygon
- *return the next available index of array.
- */
-Int directedLine::toArraySinglePolygon(directedLine** array, Int index)
-{
-  directedLine *temp;
-  array[index++] = this;
-  for(temp = next; temp != this; temp = temp->next)
-    {
-      array[index++] = temp;
-    }
-  return index;
-}
-
-/*the space is allocated. The caller is responsible for
- *deallocate the space.
- *total_num_edges is set to be the total number of edges of all polygons
- */
-directedLine** directedLine::toArrayAllPolygons(Int& total_num_edges)
-{
-  total_num_edges=numEdgesAllPolygons();
-  directedLine** ret = (directedLine**) malloc(sizeof(directedLine*) * total_num_edges);
-  assert(ret);
-
-  directedLine *temp;
-  Int index = 0;
-  for(temp=this; temp != NULL; temp=temp->nextPolygon) {
-    index = temp->toArraySinglePolygon(ret, index);
-  }
-  return ret;
-}
-
-/*assume the polygon is a simple polygon, return
- *the area enclosed by it.
- *if thee order is counterclock wise, the area is positive.
- */
-Real directedLine::polyArea()
-{
-  directedLine* temp;
-  Real ret=0.0;
-  Real x1,y1,x2,y2;
-  x1 = this->head()[0];
-  y1 = this->head()[1];
-  x2 = this->next->head()[0];
-  y2 = this->next->head()[1];
-  ret = -(x2*y1-x1*y2);
-  for(temp=this->next; temp!=this; temp = temp->next)
-    {
-      x1 = temp->head()[0];
-      y1 = temp->head()[1];
-      x2 = temp->next->head()[0];
-      y2 = temp->next->head()[1];
-      ret += -( x2*y1-x1*y2);
-    }
-  return Real(0.5)*ret;
-}
-
-/*******************split or combine polygons begin********************/
-/*conect a diagonal of a single simple polygon or  two simple polygons.
- *If the two vertices v1 (head) and v2 (head) are in the same simple polygon,
- *then we actually split the simple polygon into two polygons.
- *If instead two vertices velong to two difference polygons,
- *then we combine the  two polygons into one polygon.
- *It is upto the caller to decide whether this is a split or a
- *combination.
- *
- *Case Split:
- *split a single simple polygon into two simple polygons by
- *connecting a diagonal (two vertices).
- *v1, v2: the two vertices are the head() of the two directedLines.
- *  this routine generates one new sampledLine which is returned in
- *generatedLine,
- *and it generates two directedLines returned in ret_p1 and ret_p2.
- *ret_p1 and ret_p2 are used as the entry to the two new polygons.
- *Notice the caller should not deallocate the space of v2 and v2 after
- *calling this function, since all of the edges are connected to
- *ret_p1 or ret_p2.
- *
- *combine:
- *combine two simpolygons into one by connecting one diagonal.
- *the returned polygon is returned in ret_p1.
- */
-/*ARGSUSED*/
-void directedLine::connectDiagonal(directedLine* v1, directedLine* v2,
-			   directedLine** ret_p1,
-			   directedLine** ret_p2,
-			   sampledLine** generatedLine,
-			   directedLine* polygonList								   )
-{
-  sampledLine *nsline  = new sampledLine(2);
-
-
-
-  nsline->setPoint(0, v1->head());
-  nsline->setPoint(1, v2->head());
-
-
-
-  /*the increasing line is from v1 head to v2 head*/
-  directedLine* newLineInc = new directedLine(INCREASING, nsline);
-
-
-
-  directedLine* newLineDec = new directedLine(DECREASING, nsline);
-
-
-  directedLine* v1Prev = v1->prev;
-  directedLine* v2Prev = v2->prev;
-
-  v1	    ->prev = newLineDec;
-  v2Prev    ->next = newLineDec;
-  newLineDec->next = v1;
-  newLineDec->prev = v2Prev;
-
-  v2	    ->prev = newLineInc;
-  v1Prev    ->next = newLineInc;
-  newLineInc->next = v2;
-  newLineInc->prev = v1Prev;
-
-  *ret_p1 = newLineDec;
-  *ret_p2 = newLineInc;
-  *generatedLine = nsline;
-}
-
-//see the function connectDiangle
-/*ARGSUSED*/
-void directedLine::connectDiagonal_2slines(directedLine* v1, directedLine* v2,
-			   directedLine** ret_p1,
-			   directedLine** ret_p2,
-			   directedLine* polygonList								   )
-{
-  sampledLine *nsline  = new sampledLine(2);
-  sampledLine *nsline2	= new sampledLine(2);
-
-  nsline->setPoint(0, v1->head());
-  nsline->setPoint(1, v2->head());
-  nsline2->setPoint(0, v1->head());
-  nsline2->setPoint(1, v2->head());
-
-  /*the increasing line is from v1 head to v2 head*/
-  directedLine* newLineInc = new directedLine(INCREASING, nsline);
-
-  directedLine* newLineDec = new directedLine(DECREASING, nsline2);
-
-  directedLine* v1Prev = v1->prev;
-  directedLine* v2Prev = v2->prev;
-
-  v1	    ->prev = newLineDec;
-  v2Prev    ->next = newLineDec;
-  newLineDec->next = v1;
-  newLineDec->prev = v2Prev;
-
-  v2	    ->prev = newLineInc;
-  v1Prev    ->next = newLineInc;
-  newLineInc->next = v2;
-  newLineInc->prev = v1Prev;
-
-  *ret_p1 = newLineDec;
-  *ret_p2 = newLineInc;
-
-}
-
-Int directedLine::samePolygon(directedLine* v1, directedLine* v2)
-{
-  if(v1 == v2) return 1;
-  directedLine *temp;
-  for(temp = v1->next; temp != v1; temp = temp->next)
-    {
-      if(temp == v2) return 1;
-    }
-  return 0;
-}
-
-directedLine* directedLine::findRoot()
-{
-  if(rootBit) return this;
-  directedLine* temp;
-  for(temp = next; temp != this; temp = temp->next)
-    if(temp -> rootBit ) return temp;
-  return NULL; /*should not happen*/
-}
-
-directedLine* directedLine::rootLinkFindRoot()
-{
-  directedLine* tempRoot;
-  directedLine* tempLink;
-  tempRoot = this;
-  tempLink = rootLink;
-  while(tempLink != NULL){
-    tempRoot = tempLink;
-    tempLink = tempRoot->rootLink;
-  }
-  return tempRoot;
-}
-
-/*******************split or combine polygons end********************/
-
-/*****************IO stuff begin*******************/
-
-/*format:
- *#polygons
- * #vertices
- *  vertices
- * #vertices
- *  vertices
- *...
- */
-void directedLine::writeAllPolygons(char* filename)
-{
-  FILE* fp = fopen(filename, "w");
-  assert(fp);
-  Int nPolygons = numPolygons();
-  directedLine *root;
-  fprintf(fp, "%i\n", nPolygons);
-  for(root = this; root != NULL; root = root->nextPolygon)
-    {
-      directedLine *temp;
-      Int npoints=0;
-      npoints = root->get_npoints()-1;
-      for(temp = root->next; temp != root; temp=temp->next)
-	npoints += temp->get_npoints()-1;
-      fprintf(fp, "%i\n", npoints/*root->numEdges()*/);
-
-
-      for(Int i=0; i<root->get_npoints()-1; i++){
-	fprintf(fp, "%f ", root->getVertex(i)[0]);
-	fprintf(fp, "%f ", root->getVertex(i)[1]);
-      }
-
-      for(temp=root->next; temp != root; temp = temp->next)
-	{
-	  for(Int i=0; i<temp->get_npoints()-1; i++){
-
-	    fprintf(fp, "%f ", temp->getVertex(i)[0]);
-	    fprintf(fp, "%f ", temp->getVertex(i)[1]);
-	  }
-	  fprintf(fp,"\n");
-	}
-      fprintf(fp, "\n");
-    }
-  fclose(fp);
-}
-
-directedLine* readAllPolygons(char* filename)
-{
-  Int i,j;
-  FILE* fp = fopen(filename, "r");
-  Int nPolygons;
-  int result;
-
-  assert(fp);
-  result = fscanf(fp, "%i", &nPolygons);
-  assert(result != EOF);
-  directedLine *ret = NULL;
-
-  for(i=0; i<nPolygons; i++)
-    {
-      Int nEdges;
-      result = fscanf(fp, "%i", &nEdges);
-      assert(result != EOF);
-      Real vert[2][2] = { { 0 } };
-      Real VV[2][2];
-      /*the first two vertices*/
-      result = fscanf(fp, "%f", &(vert[0][0]));
-      assert(result != EOF);
-      result = fscanf(fp, "%f", &(vert[0][1]));
-      assert(result != EOF);
-      result = fscanf(fp, "%f", &(vert[1][0]));
-      assert(result != EOF);
-      result = fscanf(fp, "%f", &(vert[1][1]));
-      assert(result != EOF);
-      VV[1][0] = vert[0][0];
-      VV[1][1] = vert[0][1];
-      sampledLine *sLine = new sampledLine(2, vert);
-      directedLine *thisPoly = new directedLine(INCREASING, sLine);
-thisPoly->rootLinkSet(NULL);
-
-      directedLine *dLine;
-      for(j=2; j<nEdges; j++)
-	{
-	  vert[0][0]=vert[1][0];
-	  vert[0][1]=vert[1][1];
-	  result = fscanf(fp, "%f", &(vert[1][0]));
-	  assert(result != EOF);
-	  result = fscanf(fp, "%f", &(vert[1][1]));
-	  assert(result != EOF);
-	  sLine = new sampledLine(2,vert);
-	  dLine = new directedLine(INCREASING, sLine);
-dLine->rootLinkSet(thisPoly);
-	  thisPoly->insert(dLine);
-	}
-
-      VV[0][0]=vert[1][0];
-      VV[0][1]=vert[1][1];
-      sLine = new sampledLine(2,VV);
-      dLine = new directedLine(INCREASING, sLine);
-dLine->rootLinkSet(thisPoly);
-      thisPoly->insert(dLine);
-
-      ret = thisPoly->insertPolygon(ret);
-    }
-  fclose(fp);
-  return ret;
-}
-
-
-
-
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/directedLine.h b/src/glu/sgi/libnurbs/nurbtess/directedLine.h
deleted file mode 100644
index 4ed0128ca6b..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/directedLine.h
+++ /dev/null
@@ -1,171 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _DIRECTEDLINE_H
-#define _DIRECTEDLINE_H
-
-#include "definitions.h"
-#include "sampledLine.h"
-
-enum {INCREASING, DECREASING};
-
-class directedLine {
-  short direction; /*INCREASING or DECREASING*/
-  sampledLine* sline;
-  directedLine* next; /*double linked list*/
-  directedLine* prev; /*double linked list*/
-
-  /*in case we need a list of polygons each 
-   *consisting of a double linked list
-   */
-  directedLine* nextPolygon; 
-
-  /*optimization make cutoff polygon faster*/
-/*  directedLine* prevPolygon;*/
-
-  Int rootBit; /*1 if this is a root of the polygon, set by setRootBit*/
-               /*and reset by resetRootBit()*/
-
-  directedLine* rootLink; /*fast root-finding*/
-
-
-
-public:
-  directedLine(short dir, sampledLine* sl);
-  directedLine();
-  ~directedLine();
-
-  void init(short dir, sampledLine* sl);
-  
-  Real* head(); /*points[0] if INCREASING, points[n-1] otherwise*/
-  Real* tail(); /*points[n-1] if INCREASING, points[0] otherwise*/
-  Real* getVertex(Int i); /*points[i] if INCREASING, points[n-1-i] otherwise*/
-  Int get_npoints() {return sline->get_npoints();}
-  directedLine* getPrev() {return prev;}
-  directedLine* getNext() {return next;}
-  directedLine* getNextPolygon()  {return nextPolygon;}
-  sampledLine*  getSampledLine()  {return sline;}
-
-  short getDirection(){return direction;}
-  void putDirection(short dir) {direction = dir;}
-  void putPrev(directedLine *p) {prev = p;}
-  void putNext(directedLine *p) {next = p;}
-
-  /*insert a new line between prev and this*/
-  void insert(directedLine* nl);
-
-  /*delete all the polygons following the link: nextPolygon.
-   *notice that sampledLine is not deleted. The caller is
-   *responsible for that
-   */
-  void  deletePolygonList();
-  void  deleteSinglePolygon();
-
-  void  deleteSinglePolygonWithSline(); //also delete sanmpled line
-  void  deletePolygonListWithSline(); //also delete sanmpled line
-
-  void deleteSingleLine(directedLine* dline);
-  directedLine* deleteDegenerateLines();
-  directedLine* deleteDegenerateLinesAllPolygons();
-  directedLine* cutIntersectionAllPoly(int& cutOccur);
-
-  /*check to see if the list forms a closed polygon
-   *return 1 if yes
-   */
-  short isPolygon(); 
-  
-  Int compInY(directedLine* nl);
-  Int compInX(directedLine* nl);
-
-  /*return an array of pointers.
-   *the 
-   */
-  directedLine** sortAllPolygons();
-
-  Int numEdges();
-  Int numEdgesAllPolygons();
-  Int numPolygons();
-
-  /*check if the head of this edge is connected to 
-   *the tail of the prev
-   */
-  short isConnected();
-
-  Real polyArea();
-
-  void printSingle();
-  void printList();
-  void printAllPolygons();
-  void writeAllPolygons(char* filename);
-  
-
-  /*insert a polygon: using nextPolygon*/
-  directedLine* insertPolygon(directedLine* newpolygon);
-  directedLine* cutoffPolygon(directedLine *p);
-
-  Int toArraySinglePolygon(directedLine** array, Int index);
-  directedLine** toArrayAllPolygons(Int& total_num_edges);
-
-  void connectDiagonal(directedLine* v1, directedLine* v2, 
-			   directedLine** ret_p1, 
-			   directedLine** ret_p2,
-			   sampledLine** generatedLine, directedLine* list);
-
-  /*generate two slines
-   */
-  void connectDiagonal_2slines(directedLine* v1, directedLine* v2, 
-			   directedLine** ret_p1, 
-			   directedLine** ret_p2,
-			   directedLine* list);
-
-  Int samePolygon(directedLine* v1, directedLine* v2);
-  void setRootBit() {rootBit = 1;}
-  void resetRootBit() {rootBit = 0;}
-  directedLine* findRoot();
-
-  void rootLinkSet(directedLine* r) {rootLink = r;}
-  directedLine* rootLinkFindRoot();
-
-  //the chain from begin to end is deleted (the space is deallocated)
-  //and a new edge(which connectes the head of begin and the tail of end)
-  // is inserted. The new polygon is returned.
-  //notice that "this" is arbitrary
-  directedLine* deleteChain(directedLine* begin, directedLine* end);
-};
-
-directedLine*  readAllPolygons(char* filename);
-
-extern Int compV2InY(Real A[2], Real B[2]);
-extern Int compV2InX(Real A[2], Real B[2]);
-
-#endif
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/glimports.h b/src/glu/sgi/libnurbs/nurbtess/glimports.h
deleted file mode 100644
index 6e69feb405e..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/glimports.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * glimports.h
- *
- */
-
-#ifndef __gluimports_h_
-#define __gluimports_h_
-
-#include "mystdlib.h"
-#include "mystdio.h"
-
-#endif /* __gluimports_h_ */
diff --git a/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc b/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc
deleted file mode 100644
index 3c92039bae0..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc
+++ /dev/null
@@ -1,293 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <GL/gl.h>
-#include "zlassert.h"
-#include "gridWrap.h"
-
-
-/*******************grid structure****************************/
-void gridWrap::print()
-{
-  printf("n_ulines = %i\n", n_ulines);
-  printf("n_vlines = %i\n", n_vlines);
-  printf("u_min=%f, umax=%f, vmin=%f, vmax=%f\n", u_min, u_max, v_min, v_max);
-}
-
-gridWrap::gridWrap(Int nUlines, Real* uvals,
-		   Int nVlines, Real* vvals)
-{
-  assert(nUlines>=2);
-  assert(nVlines>=2);
-
-  is_uniform = 0;
-  n_ulines = nUlines;
-  n_vlines = nVlines;
-  u_min = uvals[0];
-  u_max = uvals[nUlines-1];
-  v_min = vvals[0];
-  v_max = vvals[nVlines-1];
-  u_values = (Real*) malloc(sizeof(Real) * n_ulines);
-  assert(u_values);
-  v_values = (Real*) malloc(sizeof(Real) * n_vlines);
-  assert(v_values);  
-  
-  Int i;
-  for(i=0; i<n_ulines; i++)
-    u_values[i] = uvals[i];
-  for(i=0; i<n_vlines; i++)
-    v_values[i] = vvals[i];
-}
-  
-gridWrap::gridWrap(Int nUlines, Int nVlines,
-		   Real uMin, Real uMax,
-		   Real vMin, Real vMax
-		   )
-{
-  is_uniform = 1;
-  n_ulines = nUlines;
-  n_vlines = nVlines;
-  u_min = uMin;
-  u_max = uMax;
-  v_min = vMin;
-  v_max = vMax;
-  u_values = (Real*) malloc(sizeof(Real) * n_ulines);
-  assert(u_values);
-  v_values = (Real*) malloc(sizeof(Real) * n_vlines);
-  assert(v_values);
-  
-  Int i;
-  assert(nUlines>=2);
-  assert(nVlines>=2);
-  Real du = (uMax-uMin)/(nUlines-1);
-  Real dv = (vMax-vMin)/(nVlines-1);
-
-  float tempu=uMin;
-  u_values[0] = tempu;
-  for(i=1; i<nUlines; i++)
-    {
-      tempu += du;
-      u_values[i] = tempu;
-    }
-  u_values[nUlines-1] = uMax;
-
-  float tempv=vMin;
-  v_values[0] = tempv;
-  for(i=1; i<nVlines; i++)
-    {
-      tempv += dv;
-      v_values[i] = tempv;
-    }
-  v_values[nVlines-1] = vMax;
-}
-
-gridWrap::~gridWrap()
-{
-  free(u_values);
-  free(v_values);
-}
-
-void gridWrap::draw()
-{
-  int i,j;
-  glBegin(GL_POINTS);
-  for(i=0; i<n_ulines; i++)
-    for(j=0; j<n_vlines; j++)
-      glVertex2f(get_u_value(i), get_v_value(j));
-  glEnd();
-}
-
-void gridWrap::outputFanWithPoint(Int v, Int uleft, Int uright, Real vert[2], primStream* pStream)
-{
-  Int i;
-  if(uleft >= uright) 
-    return; //no triangles to output.
-    
-  pStream->begin();
-  pStream->insert(vert);
-
-  assert(vert[1] != v_values[v]); //don't output degenerate triangles
-
-  if(vert[1] > v_values[v]) //vertex is above this grid line: notice the orientation
-    {
-      for(i=uleft; i<=uright; i++)
-	pStream->insert(u_values[i], v_values[v]);
-    }
-  else //vertex is below the grid line
-    {
-      for(i=uright; i>= uleft; i--)
-	pStream->insert(u_values[i], v_values[v]);
-    }	
-  
-  pStream->end(PRIMITIVE_STREAM_FAN);
-}
-
-
-
-/*each chain stores a number of consecutive 
- *V-lines within a grid. 
- *There is one grid vertex on each V-line.
- * The total number of V-lines is:
- *   nVlines.
- * with respect to the grid, the index of the first V-line is 
- *   firstVlineIndex.
- * So with respect to the grid, the index of the ith V-line is 
- *   firstVlineIndex-i.
- * the grid-index of the uline at the ith vline (recall that each vline has one grid point)
- * is ulineIndices[i]. The u_value is cached in ulineValues[i], that is,
- *   ulineValues[i] = grid->get_u_value(ulineIndices[i]) 
- */
-gridBoundaryChain::gridBoundaryChain(
-				     gridWrap* gr, 
-				     Int first_vline_index, 
-				     Int n_vlines, 
-				     Int* uline_indices,
-				     Int* inner_indices
-				     )
-: grid(gr), firstVlineIndex(first_vline_index), nVlines(n_vlines)
-{
-  ulineIndices = (Int*) malloc(sizeof(Int) * n_vlines);
-  assert(ulineIndices);
-
-  innerIndices = (Int*) malloc(sizeof(Int) * n_vlines);
-  assert(innerIndices);
-
-  vertices = (Real2*) malloc(sizeof(Real2) * n_vlines);
-  assert(vertices);
-  
-
-
-  Int i;
-  for(i=0; i<n_vlines; i++){
-    ulineIndices[i] = uline_indices[i];
-    innerIndices[i] = inner_indices[i];
-  }
-  
-  for(i=0; i<n_vlines; i++){
-    vertices[i][0] = gr->get_u_value(ulineIndices[i]);
-    vertices[i][1] = gr->get_v_value(first_vline_index-i);
-  }
-}
-  
-void gridBoundaryChain::draw()
-{
-  Int i;
-  glBegin(GL_LINE_STRIP);
-  for(i=0; i<nVlines; i++)
-    {
-      glVertex2fv(vertices[i]);
-    }
-  glEnd();
-}
-
-void gridBoundaryChain::drawInner()
-{
-  Int i;
-  for(i=1; i<nVlines; i++)
-    {
-      glBegin(GL_LINE_STRIP);
-      glVertex2f(grid->get_u_value(innerIndices[i]), get_v_value(i-1) );
-      glVertex2f(grid->get_u_value(innerIndices[i]), get_v_value(i) );
-      glEnd();
-    }
-}
-  
-Int gridBoundaryChain::lookfor(Real v, Int i1, Int i2)
-{
-  Int mid;
-  while(i1 < i2-1)
-    {
-      mid = (i1+i2)/2;
-      if(v > vertices[mid][1])
-	{
-	  i2 = mid;
-	}
-      else
-	i1 = mid;
-    }
-  return i1;
-}
-
-/*output the fan of the right end between grid line i-1 and grid line i*/
-void gridBoundaryChain::rightEndFan(Int i, primStream* pStream)
-{
-  Int j;
-  if(getUlineIndex(i) > getUlineIndex(i-1))
-    {
-      pStream->begin();
-      pStream->insert(get_vertex(i-1));
-      for(j=getUlineIndex(i-1); j<= getUlineIndex(i); j++)
-	pStream->insert(grid->get_u_value(j), get_v_value(i));
-      pStream->end(PRIMITIVE_STREAM_FAN);
-    }
-  else if(getUlineIndex(i) < getUlineIndex(i-1))
-    {
-      pStream->begin();
-      pStream->insert(get_vertex(i));
-      for(j=getUlineIndex(i-1); j>= getUlineIndex(i); j--)
-	pStream->insert(grid->get_u_value(j), get_v_value(i-1));
-      pStream->end(PRIMITIVE_STREAM_FAN);
-    }
-  //otherside, the two are equal, so there is no fan to output
-}
-		      
-
-/*output the fan of the left end between grid line i-1 and grid line i*/
-void gridBoundaryChain::leftEndFan(Int i, primStream* pStream)
-{
-  Int j;
-  if(getUlineIndex(i) < getUlineIndex(i-1))
-    {
-      pStream->begin();
-      pStream->insert(get_vertex(i-1));
-      for(j=getUlineIndex(i); j<= getUlineIndex(i-1); j++)
-	pStream->insert(grid->get_u_value(j), get_v_value(i));
-      pStream->end(PRIMITIVE_STREAM_FAN);
-    }
-  else if(getUlineIndex(i) > getUlineIndex(i-1))
-    {
-      pStream->begin();
-      pStream->insert(get_vertex(i));
-      for(j=getUlineIndex(i); j>= getUlineIndex(i-1); j--)
-	pStream->insert(grid->get_u_value(j), get_v_value(i-1));
-      pStream->end(PRIMITIVE_STREAM_FAN);
-    }
-  /*otherwisem, the two are equal, so there is no fan to outout*/	  
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/gridWrap.h b/src/glu/sgi/libnurbs/nurbtess/gridWrap.h
deleted file mode 100644
index b6428484f02..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/gridWrap.h
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _GRIDWRAP_H
-#define _GRIDWRAP_H
-
-#include <stdio.h>
-#include "definitions.h"
-
-#include "primitiveStream.h"
-#include "zlassert.h"
-
-class gridWrap{
-  Int n_ulines;
-  Int n_vlines;
-  Real u_min, u_max;
-  Real v_min, v_max;
-
-  /*cache the coordinate values for efficiency. 
-   *these are redundant information when 
-   *the grid is uniform.
-   */
-  Real* u_values; /*size is n_ulines*/
-  Real* v_values; /*size is n_vlines*/
-
-  Int is_uniform; 
-
-public:
-  //uniform grid constructor
-  gridWrap(Int nUlines, Int nVlines,
-	   Real uMin, Real uMax,
-	   Real vMin, Real vMax
-	   );
-
-  //nonuniform grid constructor.
-  gridWrap(Int nUlines, Real *uvals,
-	   Int nVlines, Real *vvlas
-	   );
-  ~gridWrap();
-  
-  void print();
-  Int get_n_ulines() {return n_ulines;}
-  Int get_n_vlines() {return n_vlines;}
-  Real get_u_min() {return u_min;}
-  Real get_u_max() {return u_max;}
-  Real get_v_min() {return v_min;}
-  Real get_v_max() {return v_max;}
-
-  Real get_u_value(Int i) 
-    {
-      assert(i<n_ulines);
-      /*if(i>=n_ulines){printf("ERROR, n_ulines=%i,i=%i\n",n_ulines,i);exit(0);}*/      
-      return u_values[i];}
-  Real get_v_value(Int j) {return v_values[j];}
-
-  Real* get_u_values() {return u_values;}
-  Real* get_v_values() {return v_values;}
-
-  void outputFanWithPoint(Int v, Int uleft, Int uright, 
-			  Real vert[2], primStream* pStream);
-
-  void draw();
-
-  Int isUniform() {return is_uniform;}
-};
-
-class gridBoundaryChain{
-  gridWrap* grid;
-  Int firstVlineIndex;
-  Int nVlines;
-  Int* ulineIndices; /*each v line has a boundary*/
-  Int* innerIndices; /*the segment of the vertical gridline from */
-                     /*(innerIndices[i], i) to (innerIndices[i+1], i-1) */
-                     /*is inside the polygon: i=1,...,nVlines-1*/
-
-  Real2* vertices; /*one grid point at each grid V-line, cached for efficiency*/
-
-public:
-  gridBoundaryChain(gridWrap* gr, Int first_vline_index, Int n_vlines, Int* uline_indices, Int* inner_indices);
-
-  ~gridBoundaryChain()
-    {
-      free(innerIndices);
-      free(ulineIndices);
-      free(vertices);
-    }
-
-  /*i indexes the vlines in this chain.
-   */
-  Int getVlineIndex(Int i) {return firstVlineIndex-i;}
-  Int getUlineIndex(Int i) {return ulineIndices[i];}
-  Real get_u_value(Int i) {return vertices[i][0];}
-  Real get_v_value(Int i) {return vertices[i][1];}
-  Int get_nVlines() {return nVlines;}
-  Int getInnerIndex(Int i) {return innerIndices[i];}
-  Real getInner_u_value(Int i) {return grid->get_u_value(innerIndices[i]);}
-
-  Real* get_vertex(Int i) {return vertices[i];}
-  gridWrap* getGrid() {return grid;}
-  void leftEndFan(Int i, primStream* pStream);
-  void rightEndFan(Int i, primStream* pStream);
-
-  Int lookfor(Real v, Int i1, Int i2); //find i in [i1,i2] so that  vertices[i][1]>= v > vertices[i+1][1]
-  void draw();
-  void drawInner();
-};
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/monoChain.cc b/src/glu/sgi/libnurbs/nurbtess/monoChain.cc
deleted file mode 100644
index cb28129adfb..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/monoChain.cc
+++ /dev/null
@@ -1,936 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <GL/gl.h>
-
-#include "glimports.h"
-#include "zlassert.h"
-
-#include "monoChain.h"
-#include "quicksort.h"
-#include "searchTree.h"
-#include "polyUtil.h"
-
-#ifndef max
-#define max(a,b) ((a>b)? a:b)
-#endif
-#ifndef min
-#define min(a,b) ((a>b)? b:a)
-#endif
-
-extern Int isCusp(directedLine *v);
-extern Int deleteRepeatDiagonals(Int num_diagonals, directedLine** diagonal_vertices, directedLine** new_vertices);
-
-//for debug purpose only
-#if 0 // UNUSED
-static void drawDiagonals(Int num_diagonals, directedLine** diagonal_vertices)
-{
-  Int i;
-  for(i=0; i<num_diagonals; i++)
-    {
-      glBegin(GL_LINE);
-      glVertex2fv(diagonal_vertices[2*i]->head());
-      glVertex2fv(diagonal_vertices[2*i+1]->head());
-      glEnd();
-    }
-}
-#endif
-
-/*given (x_1, y_1) and (x_2, y_2), and y
- *return x such that (x,y) is on the line
- */
-inline Real intersectHoriz(Real x1, Real y1, Real x2, Real y2, Real y)
-{
-  return ((y2==y1)? (x1+x2)*0.5 : x1 + ((y-y1)/(y2-y1)) * (x2-x1));
-}
-
-//compare the heads of the two chains
-static int compChainHeadInY(monoChain* mc1, monoChain* mc2)
-{
-  return compV2InY(mc1->getHead()->head(), mc2->getHead()->head());
-}
-
-monoChain::monoChain(directedLine* cHead, directedLine* cTail)
-{
-  chainHead = cHead;
-  chainTail = cTail;
-  next = this;
-  prev = this;
-  
-  nextPolygon = NULL;
-
-  //compute bounding box
-  directedLine* temp;
-  minX = maxX = chainTail->head()[0];
-  minY = maxY = chainTail->head()[1];
-
-  for(temp=chainHead; temp!=cTail; temp = temp->getNext())
-    {
-      if(temp->head()[0] < minX)
-	minX = temp->head()[0];
-      if(temp->head()[0] > maxX)
-	maxX = temp->head()[0];
-
-      if(temp->head()[1] < minY)
-	minY = temp->head()[1];
-      if(temp->head()[1] > maxY)
-	maxY = temp->head()[1];
-    }
-
-  //check whether the chain is increasing or decreasing
-  if(chainHead->compInY(chainTail) <0)
-    isIncrease = 1;
-  else
-    isIncrease = 0;
-  
-  //initilize currrent, this is used for accelerating search
-  if(isIncrease)
-    current = chainHead;
-  else
-    current = chainTail;
-
-  isKey = 0;
-  keyY = 0;
-}
-
-//insert a new line between prev and this
-void monoChain::insert(monoChain* nc)
-{
-  nc->next = this;
-  nc->prev = prev;
-  prev->next = nc;
-  prev = nc;
-}
-
-void monoChain::deleteLoop()
-{
-  monoChain *temp, *tempNext;
-  prev->next = NULL;
-  for(temp=this; temp != NULL; temp = tempNext)
-    {
-      tempNext = temp->next;
-      delete temp;
-    }
-}
-
-void monoChain::deleteLoopList()
-{
-  monoChain *temp, *tempNext;
-  for(temp=this; temp != NULL; temp = tempNext)
-    {
-      tempNext = temp->nextPolygon;
-      temp->deleteLoop();
-    }
-}
-
-Int monoChain::toArraySingleLoop(monoChain** array, Int index)
-{
-  monoChain *temp;
-  array[index++] = this;
-  for(temp = next; temp != this; temp = temp->next)
-    {
-      array[index++] = temp;
-    }
-  return index;
-}
-
-monoChain** monoChain::toArrayAllLoops(Int& num_chains)
-{
-  num_chains = numChainsAllLoops();
-  monoChain **ret =  (monoChain**) malloc(sizeof(monoChain*) * num_chains);
-  assert(ret);
-  monoChain *temp;
-  Int index = 0;
-  for(temp = this; temp != NULL; temp=temp->nextPolygon){
-    index = temp->toArraySingleLoop(ret, index);
-  }
-  return ret;
-}
-
-Int monoChain::numChainsSingleLoop()
-{
-  Int ret=0;
-  monoChain* temp;
-  if(next == this) return 1;
-  ret = 1;
-  for(temp=next; temp != this; temp = temp->next)
-    ret++;
-  return ret;
-}
-
-Int monoChain::numChainsAllLoops()
-{
-  Int ret=0;
-  monoChain *temp;
-  for(temp =this; temp != NULL; temp = temp->nextPolygon)
-    ret += temp->numChainsSingleLoop();
-  return ret;
-}
-
-//update 'current'
-Real monoChain::chainIntersectHoriz(Real y)
-{
-  directedLine* temp;
-  if(isIncrease)
-    {
-      for(temp= current; temp != chainTail; temp = temp->getNext())
-	{
-	  if(temp->head()[1] > y)
-	    break;
-	}
-      current = temp->getPrev();
-    }
-  else 
-    {
-      for(temp = current; temp != chainHead; temp = temp->getPrev())
-	{
-	  if(temp->head()[1] > y)
-	    break;
-	}
-      current = temp->getNext();
-    }
-  return intersectHoriz(current->head()[0], current->head()[1], current->tail()[0], current->tail()[1], y);
-}
-
-monoChain* directedLineLoopToMonoChainLoop(directedLine* loop)
-{
-  directedLine *temp;
-  monoChain *ret=NULL;
-
-  //find the first cusp
-  directedLine *prevCusp=NULL;
-  directedLine *firstCusp;
-
-  if(isCusp(loop))
-    prevCusp = loop;
-  else
-    {
-      for(temp = loop->getNext(); temp != loop; temp = temp->getNext())
-	if(isCusp(temp))
-	  break;
-      prevCusp = temp;
-    }
-  firstCusp = prevCusp;
-//printf("first cusp is (%f,%f), (%f,%f), (%f,%f)\n", prevCusp->getPrev()->head()[0], prevCusp->getPrev()->head()[1], prevCusp->head()[0], prevCusp->head()[1], prevCusp->tail()[0], prevCusp->tail()[1]);
-
-  for(temp = prevCusp->getNext(); temp != loop; temp = temp->getNext())
-    {
-      if(isCusp(temp))
-	{
-//printf("the cusp is (%f,%f), (%f,%f), (%f,%f)\n", temp->getPrev()->head()[0], temp->getPrev()->head()[1], temp->head()[0], temp->head()[1], temp->tail()[0], temp->tail()[1]);
-	  if(ret == NULL)
-	    {
-	      ret = new monoChain(prevCusp, temp);
-	    }
-	  else
-	    ret->insert(new monoChain(prevCusp, temp));
-	  prevCusp = temp;	  
-	}
-    }
-  assert(ret);
-  ret->insert(new monoChain(prevCusp, firstCusp));
-
-  return ret;
-}
-
-monoChain* directedLineLoopListToMonoChainLoopList(directedLine* list)
-{
-  directedLine* temp;
-  monoChain* mc;
-  monoChain* mcEnd;
-  mc = directedLineLoopToMonoChainLoop(list);
-  mcEnd = mc;  
-  for(temp = list->getNextPolygon(); temp != NULL; temp = temp->getNextPolygon())
-    {
-      monoChain *newLoop = directedLineLoopToMonoChainLoop(temp);
-      mcEnd->setNextPolygon(newLoop);
-      mcEnd = newLoop;
-    }
-  return mc;
-}
-
-/*compare two edges of a polygon.
- *edge A < edge B if there is a horizontal line so that the intersection
- *with A is to the left of the intersection with B.
- *This function is used in sweepY for the dynamic search tree insertion to
- *order the edges.
- * Implementation: (x_1,y_1) and (x_2, y_2)
- */
-static Int compEdges(directedLine *e1, directedLine *e2)
-{
-  Real* head1 = e1->head();
-  Real* tail1 = e1->tail();
-  Real* head2 = e2->head();
-  Real* tail2 = e2->tail();
-/*
-  Real h10 = head1[0];
-  Real h11 = head1[1];
-  Real t10 = tail1[0];
-  Real t11 = tail1[1];
-  Real h20 = head2[0];
-  Real h21 = head2[1];
-  Real t20 = tail2[0];
-  Real t21 = tail2[1];
-*/
-  Real e1_Ymax, e1_Ymin, e2_Ymax, e2_Ymin;
-/*
-  if(h11>t11) {
-    e1_Ymax= h11;
-    e1_Ymin= t11;
-  }
-  else{
-    e1_Ymax = t11;
-    e1_Ymin = h11;
-  }
-
-  if(h21>t21) {
-    e2_Ymax= h21;
-    e2_Ymin= t21;
-  }
-  else{
-    e2_Ymax = t21;
-    e2_Ymin = h21;
-  }
-*/
- 
-  if(head1[1]>tail1[1]) {
-    e1_Ymax= head1[1];
-    e1_Ymin= tail1[1];
-  }
-  else{
-    e1_Ymax = tail1[1];
-    e1_Ymin = head1[1];
-  }
-
-  if(head2[1]>tail2[1]) {
-    e2_Ymax= head2[1];
-    e2_Ymin= tail2[1];
-  }
-  else{
-    e2_Ymax = tail2[1];
-    e2_Ymin = head2[1];
-  }
-
-  
-  /*Real e1_Ymax = max(head1[1], tail1[1]);*/ /*max(e1->head()[1], e1->tail()[1]);*/
-  /*Real e1_Ymin = min(head1[1], tail1[1]);*/ /*min(e1->head()[1], e1->tail()[1]);*/
-  /*Real e2_Ymax = max(head2[1], tail2[1]);*/ /*max(e2->head()[1], e2->tail()[1]);*/
-  /*Real e2_Ymin = min(head2[1], tail2[1]);*/ /*min(e2->head()[1], e2->tail()[1]);*/
-
-  Real Ymax = min(e1_Ymax, e2_Ymax);
-  Real Ymin = max(e1_Ymin, e2_Ymin);
-    
-  Real y = 0.5*(Ymax + Ymin);
-
-/*  Real x1 = intersectHoriz(e1->head()[0], e1->head()[1], e1->tail()[0], e1->tail()[1], y);
-  Real x2 = intersectHoriz(e2->head()[0], e2->head()[1], e2->tail()[0], e2->tail()[1], y);
-*/
-/*
-  Real x1 = intersectHoriz(h10, h11, t10, t11, y);
-  Real x2 = intersectHoriz(h20, h21, t20, t21, y);
-*/
-  Real x1 = intersectHoriz(head1[0], head1[1], tail1[0], tail1[1], y);
-  Real x2 = intersectHoriz(head2[0], head2[1], tail2[0], tail2[1], y);
-
-  if(x1<= x2) return -1;
-  else return 1;
-}
-
-Int  compChains(monoChain* mc1, monoChain* mc2)
-{
-  Real y;
-  assert(mc1->isKey || mc2->isKey);
-  if(mc1->isKey)
-    y = mc1->keyY;
-  else
-    y = mc2->keyY;
-  directedLine *d1 = mc1->find(y);
-  directedLine *d2 = mc2->find(y);
-  mc2->find(y);
-//  Real x1 = mc1->chainIntersectHoriz(y);
-//  Real x2 = mc2->chainIntersectHoriz(y);
-  return   compEdges(d1, d2);
-}
-
-//this function modifies current for efficiency
-directedLine* monoChain::find(Real y)
-{
-  directedLine *ret;
-  directedLine *temp;
-  assert(current->head()[1] <= y);
-  if(isIncrease)
-    {
-      assert(chainTail->head()[1] >=y);
-      for(temp=current; temp!=chainTail; temp = temp->getNext())
-	{
-	  if(temp->head()[1] > y)
-	    break;
-	}
-      current = temp->getPrev();
-      ret = current;
-    }
-  else
-    {
-      for(temp=current; temp != chainHead; temp = temp->getPrev())
-	{
-	  if(temp->head()[1] > y)
-	    break;
-	}
-      current = temp->getNext();
-      ret = temp;
-    }
-  return ret;  
-}
-
-void monoChain::printOneChain()
-{
-  directedLine* temp;
-  for(temp = chainHead; temp != chainTail; temp = temp->getNext())
-    {
-      printf("(%f,%f) ", temp->head()[0], temp->head()[1]);
-    }
-  printf("(%f,%f) \n", chainTail->head()[0], chainTail->head()[1]);  
-}
-
-void monoChain::printChainLoop()
-{
-  monoChain* temp;
-  this->printOneChain();
-  for(temp = next; temp != this; temp = temp->next)
-    {
-      temp->printOneChain();
-    }
-  printf("\n");
-}
-
-void monoChain::printAllLoops()
-{
-  monoChain* temp;
-  for(temp=this; temp != NULL; temp = temp->nextPolygon)
-    temp->printChainLoop();
-}
-
-//return 1 if error occures
-Int MC_sweepY(Int nVertices, monoChain** sortedVertices, sweepRange** ret_ranges)
-{
-  Int i;
-  Real keyY;
-  Int errOccur=0;
-//printf("enter MC_sweepY\n");
-//printf("nVertices=%i\n", nVertices);
-  /*for each vertex in the sorted list, update the binary search tree.
-   *and store the range information for each vertex.
-   */
-  treeNode* searchTree = NULL;
-//printf("nVertices=%i\n", nVertices);
-  for(i=0; i<nVertices; i++)
-    {
-      monoChain* vert = sortedVertices[i];
-      keyY = vert->getHead()->head()[1]; //the sweep line
-      directedLine *dline = vert->getHead();
-      directedLine *dlinePrev = dline->getPrev();
-      if(isBelow(dline, dline) && isBelow(dline, dlinePrev))
-	{
-//printf("case 1\n");
-	  //this<v and prev < v
-	  //delete both edges
-	  vert->isKey = 1;
-	  vert->keyY = keyY;
-	  treeNode* thisNode = TreeNodeFind(searchTree, vert, (Int (*) (void *, void *))compChains);
-	  vert->isKey = 0;
-
-	  vert->getPrev()->isKey = 1;
-	  vert->getPrev()->keyY = keyY;
-	  treeNode* prevNode = TreeNodeFind(searchTree, vert->getPrev(), (Int (*) (void *, void *))compChains);
-	  vert->getPrev()->isKey = 0;
-
-	  if(cuspType(dline) == 1)//interior cusp
-	    {
-
-	      treeNode* leftEdge = TreeNodePredecessor(prevNode);
-	      treeNode* rightEdge = TreeNodeSuccessor(thisNode);
-	      if(leftEdge == NULL ||  rightEdge == NULL)
-		{
-		  errOccur = 1;
-		  goto JUMP_HERE;
-		}
-
-	      directedLine* leftEdgeDline = ((monoChain* ) leftEdge->key)->find(keyY);
-
-
-
-	      directedLine* rightEdgeDline = ((monoChain* ) rightEdge->key)->find(keyY);
-
-	      ret_ranges[i] = sweepRangeMake(leftEdgeDline, 1, rightEdgeDline, 1);
-	    }
-	  else /*exterior cusp*/
-	    {
-	      ret_ranges[i] = sweepRangeMake( dline, 1, dlinePrev, 1);
-	    }
-
-	  searchTree = TreeNodeDeleteSingleNode(searchTree, thisNode);
-	  searchTree = TreeNodeDeleteSingleNode(searchTree, prevNode);
-
-	}
-      else if(isAbove(dline, dline) && isAbove(dline, dlinePrev))
-	{
-//printf("case 2\n");
-	  //insert both edges
-	  treeNode* thisNode = TreeNodeMake(vert);
-	  treeNode* prevNode = TreeNodeMake(vert->getPrev());
-	  
-	  vert->isKey = 1;
-          vert->keyY = keyY;
-	  searchTree = TreeNodeInsert(searchTree, thisNode, (Int (*) (void *, void *))compChains);
-          vert->isKey = 0;
-
-          vert->getPrev()->isKey = 1;
-          vert->getPrev()->keyY = keyY;
-	  searchTree = TreeNodeInsert(searchTree, prevNode, (Int (*) (void *, void *))compChains);
-          vert->getPrev()->isKey = 0;
-
-	  if(cuspType(dline) == 1) //interior cusp
-	    {
-//printf("cuspType is 1\n");
-	      treeNode* leftEdge = TreeNodePredecessor(thisNode);
-	      treeNode* rightEdge = TreeNodeSuccessor(prevNode);
-              if(leftEdge == NULL || rightEdge == NULL)
-		{
-		  errOccur = 1;
-		  goto JUMP_HERE;
-		}
-//printf("leftEdge is %i, rightEdge is %i\n", leftEdge, rightEdge);
-	      directedLine* leftEdgeDline = ((monoChain*) leftEdge->key)->find(keyY);
-	      directedLine* rightEdgeDline = ((monoChain*) rightEdge->key)->find(keyY);
-	      ret_ranges[i] = sweepRangeMake( leftEdgeDline, 1, rightEdgeDline, 1);
-	    }
-	  else //exterior cusp
-	    {
-//printf("cuspType is not 1\n");
-	      ret_ranges[i] = sweepRangeMake(dlinePrev, 1, dline, 1);
-	    }
-	}
-      else
-	{	  
-//printf("%i,%i\n", isAbove(dline, dline), isAbove(dline, dlinePrev));
-	  errOccur = 1;
-	  goto JUMP_HERE;
-      
-	  fprintf(stderr, "error in MC_sweepY\n");
-	  exit(1);
-	}
-    }
-
- JUMP_HERE:
-  //finally clean up space: delete  the search tree
-  TreeNodeDeleteWholeTree(searchTree);
-  return errOccur;
-}
-	  
-void MC_findDiagonals(Int total_num_edges, monoChain** sortedVertices,
-		   sweepRange** ranges, Int& num_diagonals, 
-		   directedLine** diagonal_vertices)
-{
-  Int i,j,k;
-  k=0;
-  //reset 'current' of all the monoChains
-  for(i=0; i<total_num_edges; i++)
-    sortedVertices[i]->resetCurrent();
-  
-  for(i=0; i<total_num_edges; i++)
-    {
-      directedLine* vert = sortedVertices[i]->getHead();
-      directedLine* thisEdge = vert;
-      directedLine* prevEdge = vert->getPrev();
-      if(isBelow(vert, thisEdge) && isBelow(vert, prevEdge) && compEdges(prevEdge, thisEdge)<0)
-	{
-	  //this is an upward interior cusp
-	  diagonal_vertices[k++] = vert;
-
-	  directedLine* leftEdge = ranges[i]->left;
-	  directedLine* rightEdge = ranges[i]->right;
-	  
-	  directedLine* leftVert = leftEdge;
-	  directedLine* rightVert = rightEdge->getNext();
-	  assert(leftVert->head()[1] >= vert->head()[1]);
-	  assert(rightVert->head()[1] >= vert->head()[1]);
-	  directedLine* minVert = (leftVert->head()[1] <= rightVert->head()[1])?leftVert:rightVert;
-	  Int found = 0;
-	  for(j=i+1; j<total_num_edges; j++)
-	    {
-	      if(sortedVertices[j]->getHead()->head()[1] > minVert->head()[1])
-		break;
-	      
-	      if(sweepRangeEqual(ranges[i], ranges[j]))
-		{
-		  found = 1;
-		  break;
-		}
-	    }
-
-	  if(found)
-	    diagonal_vertices[k++] = sortedVertices[j]->getHead();
-	  else
-	    diagonal_vertices[k++] = minVert;
-	}	  
-      else if(isAbove(vert, thisEdge) && isAbove(vert, prevEdge) && compEdges(prevEdge, thisEdge)>0)
-	{
-	  //downward interior cusp
-	  diagonal_vertices[k++] = vert;
-	  directedLine* leftEdge = ranges[i]->left;
-	  directedLine* rightEdge = ranges[i]->right;
-	  directedLine* leftVert = leftEdge->getNext();
-	  directedLine* rightVert = rightEdge;
-	  assert(leftVert->head()[1] <= vert->head()[1]);
-	  assert(rightVert->head()[1] <= vert->head()[1]);
-	  directedLine* maxVert = (leftVert->head()[1] > rightVert->head()[1])? leftVert:rightVert;
-	  Int found=0;
-	  for(j=i-1; j>=0; j--)
-	    {
-	      if(sortedVertices[j]->getHead()->head()[1] < maxVert->head()[1])
-		break;
-	      if(sweepRangeEqual(ranges[i], ranges[j]))
-		{
-		  found = 1;
-		  break;
-		}
-	    }
-	  if(found)
-	    diagonal_vertices[k++] = sortedVertices[j]->getHead();
-	  else
-	    diagonal_vertices[k++] = maxVert;
-	}
-    }
-  num_diagonals = k/2;
-}
-	  
-	  
-	    
-
-directedLine* MC_partitionY(directedLine *polygons, sampledLine **retSampledLines)
-{
-//printf("enter mc_partitionY\n");
-  Int total_num_chains = 0;
-  monoChain* loopList = directedLineLoopListToMonoChainLoopList(polygons);
-  monoChain** array = loopList->toArrayAllLoops(total_num_chains);
-
-  if(total_num_chains<=2) //there is just one single monotone polygon
-    {
-      loopList->deleteLoopList();
-      free(array); 
-      *retSampledLines = NULL;
-      return polygons;
-    }
-
-//loopList->printAllLoops();
-//printf("total_num_chains=%i\n", total_num_chains);
-  quicksort( (void**)array, 0, total_num_chains-1, (Int (*)(void*, void*))compChainHeadInY);
-//printf("after quicksort\n");  
-
-  sweepRange** ranges = (sweepRange**)malloc(sizeof(sweepRange*) * (total_num_chains));
-  assert(ranges);
-
-  if(MC_sweepY(total_num_chains, array, ranges))
-    {
-      loopList->deleteLoopList();
-      free(array); 
-      *retSampledLines = NULL;
-      return NULL;
-    }
-//printf("after MC_sweepY\n");
-
-
-  Int num_diagonals;
-  /*number diagonals is < total_num_edges*total_num_edges*/
-  directedLine** diagonal_vertices = (directedLine**) malloc(sizeof(directedLine*) * total_num_chains*2/*total_num_edges*/);
-  assert(diagonal_vertices);
-
-//printf("before call MC_findDiagonales\n");
-
-  MC_findDiagonals(total_num_chains, array, ranges, num_diagonals, diagonal_vertices);
-//printf("after call MC_findDia, num_diagnla=%i\n", num_diagonals);
-
-  directedLine* ret_polygons = polygons;
-  sampledLine* newSampledLines = NULL;
-  Int i,k;
-
-  num_diagonals=deleteRepeatDiagonals(num_diagonals, diagonal_vertices, diagonal_vertices);
-
-
-
-//drawDiagonals(num_diagonals, diagonal_vertices);
-//printf("diagoanls are \n");
-//for(i=0; i<num_diagonals; i++)
-//  {
-//    printf("(%f,%f)\n", diagonal_vertices[2*i]->head()[0], diagonal_vertices[2*i]->head()[1]);
-//    printf("**(%f,%f)\n", diagonal_vertices[2*i+1]->head()[0], diagonal_vertices[2*i+1]->head()[1]);
-//  }
-
-  Int *removedDiagonals=(Int*)malloc(sizeof(Int) * num_diagonals);
-  for(i=0; i<num_diagonals; i++)
-    removedDiagonals[i] = 0;
-//  printf("first pass\n");
-
-
- for(i=0,k=0; i<num_diagonals; i++,k+=2)
-    {
-
-
-      directedLine* v1=diagonal_vertices[k];
-      directedLine* v2=diagonal_vertices[k+1];
-      directedLine* ret_p1;
-      directedLine* ret_p2;
-      
-      /*we ahve to determine whether v1 and v2 belong to the same polygon before
-       *their structure are modified by connectDiagonal().
-       */
-/*
-      directedLine *root1 = v1->findRoot();
-      directedLine *root2 = v2->findRoot();
-      assert(root1);      
-      assert(root2);
-*/
-
-directedLine*  root1 = v1->rootLinkFindRoot();
-directedLine*  root2 = v2->rootLinkFindRoot();
-
-      if(root1 != root2)
-	{
-
-	  removedDiagonals[i] = 1;
-	  sampledLine* generatedLine;
-
-
-
-	  v1->connectDiagonal(v1,v2, &ret_p1, &ret_p2, &generatedLine, ret_polygons);
-
-
-
-	  newSampledLines = generatedLine->insert(newSampledLines);
-/*
-	  ret_polygons = ret_polygons->cutoffPolygon(root1);
-
-	  ret_polygons = ret_polygons->cutoffPolygon(root2);
-	  ret_polygons = ret_p1->insertPolygon(ret_polygons);
-root1->rootLinkSet(ret_p1);
-root2->rootLinkSet(ret_p1);
-ret_p1->rootLinkSet(NULL);
-ret_p2->rootLinkSet(ret_p1);
-*/
-	  ret_polygons = ret_polygons->cutoffPolygon(root2);
-
-
-
-root2->rootLinkSet(root1);
-ret_p1->rootLinkSet(root1);
-ret_p2->rootLinkSet(root1);
-
-       /*now that we have connected the diagonal v1 and v2, 
-        *we have to check those unprocessed diagonals which 
-        *have v1 or v2 as an end point. Notice that the head of v1
-        *has the same coodinates as the head of v2->prev, and the head of
-        *v2 has the same coordinate as the head of v1->prev. 
-        *Suppose these is a diagonal (v1, x). If (v1,x) is still a valid
-        *diagonal, then x should be on the left hand side of the directed line:        *v1->prev->head -- v1->head -- v1->tail. Otherwise, (v1,x) should be  
-        *replaced by (v2->prev, x), that is, x is on the left of 
-        * v2->prev->prev->head, v2->prev->head, v2->prev->tail.
-        */
-        Int ii, kk;
-        for(ii=0, kk=0; ii<num_diagonals; ii++, kk+=2)
-	  if( removedDiagonals[ii]==0)
-	    {
-	      directedLine* d1=diagonal_vertices[kk];
-	      directedLine* d2=diagonal_vertices[kk+1];
-	      /*check d1, and replace diagonal_vertices[kk] if necessary*/
-	      if(d1 == v1) {
-		/*check if d2 is to left of v1->prev->head:v1->head:v1->tail*/
-		if(! pointLeft2Lines(v1->getPrev()->head(), 
-				     v1->head(), v1->tail(), d2->head()))
-		  {
-/*
-		    assert(pointLeft2Lines(v2->getPrev()->getPrev()->head(),
-					   v2->getPrev()->head(), 
-					   v2->getPrev()->tail(), d2->head()));
-*/
-		    diagonal_vertices[kk] = v2->getPrev();
-		  }
-	      }
-	      if(d1 == v2) {
-		/*check if d2 is to left of v2->prev->head:v2->head:v2->tail*/
-		if(! pointLeft2Lines(v2->getPrev()->head(),
-				     v2->head(), v2->tail(), d2->head()))
-		  {
-/*
-		    assert(pointLeft2Lines(v1->getPrev()->getPrev()->head(),
-					   v1->getPrev()->head(),
-					   v1->getPrev()->tail(), d2->head()));
-*/
-		    diagonal_vertices[kk] = v1->getPrev();
-		  }
-	      }
-	      /*check d2 and replace diagonal_vertices[k+1] if necessary*/
-	      if(d2 == v1) {
-		/*check if d1 is to left of v1->prev->head:v1->head:v1->tail*/
-		if(! pointLeft2Lines(v1->getPrev()->head(), 
-				     v1->head(), v1->tail(), d1->head()))
-		  {
-/*		    assert(pointLeft2Lines(v2->getPrev()->getPrev()->head(),
-					   v2->getPrev()->head(), 
-					   v2->getPrev()->tail(), d1->head()));
-*/
-		    diagonal_vertices[kk+1] = v2->getPrev();
-		  }
-	      }
-	      if(d2 == v2) {
-		/*check if d1 is to left of v2->prev->head:v2->head:v2->tail*/
-		if(! pointLeft2Lines(v2->getPrev()->head(),
-				     v2->head(), v2->tail(), d1->head()))
-		  {
-/*		    assert(pointLeft2Lines(v1->getPrev()->getPrev()->head(),
-					   v1->getPrev()->head(),
-					   v1->getPrev()->tail(), d1->head()));
-*/
-		    diagonal_vertices[kk+1] = v1->getPrev();
-		  }
-	      }
-	    }					    	       
-}/*end if (root1 not equal to root 2)*/
-}
-
-  /*second pass,  now all diagoals should belong to the same polygon*/
-//printf("second pass: \n");
-
-//  for(i=0; i<num_diagonals; i++)
-//    printf("%i ", removedDiagonals[i]);
-
-
-  for(i=0,k=0; i<num_diagonals; i++, k += 2)
-    if(removedDiagonals[i] == 0) 
-      {
-
-
-	directedLine* v1=diagonal_vertices[k];
-	directedLine* v2=diagonal_vertices[k+1];
-
-
-
-	directedLine* ret_p1;
-	directedLine* ret_p2;
-
-	/*we ahve to determine whether v1 and v2 belong to the same polygon before
-	 *their structure are modified by connectDiagonal().
-	 */
-	directedLine *root1 = v1->findRoot();
-/*
-	directedLine *root2 = v2->findRoot();
-
-
-
-	assert(root1);      
-	assert(root2);      
-	assert(root1 == root2);
-  */    
-	sampledLine* generatedLine;
-
-
-
-	v1->connectDiagonal(v1,v2, &ret_p1, &ret_p2, &generatedLine, ret_polygons);
-	newSampledLines = generatedLine->insert(newSampledLines);
-
-	ret_polygons = ret_polygons->cutoffPolygon(root1);
-
-	ret_polygons = ret_p1->insertPolygon(ret_polygons);
-
-	ret_polygons = ret_p2->insertPolygon(ret_polygons);
-
-
-
-	for(Int j=i+1; j<num_diagonals; j++) 
-	  {
-	    if(removedDiagonals[j] ==0)
-	      {
-
-		directedLine* temp1=diagonal_vertices[2*j];
-		directedLine* temp2=diagonal_vertices[2*j+1];
-               if(temp1==v1 || temp1==v2 || temp2==v1 || temp2==v2)
-		if(! temp1->samePolygon(temp1, temp2))
-		  {
-		    /*if temp1 and temp2 are in different polygons, 
-		     *then one of them must be v1 or v2.
-		     */
-
-
-
-		    assert(temp1==v1 || temp1 == v2 || temp2==v1 || temp2 ==v2);
-		    if(temp1==v1) 
-		      {
-			diagonal_vertices[2*j] = v2->getPrev();
-		      }
-		    if(temp2==v1)
-		      {
-			diagonal_vertices[2*j+1] = v2->getPrev();
-		      }
-		    if(temp1==v2)
-		      {
-			diagonal_vertices[2*j] = v1->getPrev();		      
-		      }
-		    if(temp2==v2)
-		      {
-			diagonal_vertices[2*j+1] = v1->getPrev();
-		      }
-		  }
-	      }
-	  }      
-
-      }
-
-
-  //clean up
-  loopList->deleteLoopList();
-  free(array);
-  free(ranges);
-  free(diagonal_vertices);
-  free(removedDiagonals);
-
-  *retSampledLines = newSampledLines;
-  return ret_polygons;
-}
-      
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/monoChain.h b/src/glu/sgi/libnurbs/nurbtess/monoChain.h
deleted file mode 100644
index 999f1631902..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/monoChain.h
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _MONO_CHAIN_H
-#define _MONO_CHAIN_H
-
-#include "directedLine.h"
-#include "partitionY.h"
-
-class monoChain;
-
-class monoChain{
-  directedLine* chainHead;
-  directedLine* chainTail;
-  monoChain* next;
-  monoChain* prev;
-  monoChain* nextPolygon; //a list of polygons
-  
-  //cached informatin
-  //bounding box
-  Real minX, maxX, minY, maxY;
-  Int isIncrease;
-  
-  //for efficiently comparing two chains
-
-  directedLine* current;
-  
-public:
-  monoChain(directedLine* cHead, directedLine* cTail);
-  ~monoChain() {}
-  
-  inline  void setNext(monoChain* n) {next = n;}
-  inline void setPrev(monoChain* p) {prev = p;}
-  inline void setNextPolygon(monoChain* np) {nextPolygon = np;}
-  inline monoChain* getNext() {return next;}
-  inline monoChain* getPrev() {return prev;}
-  inline directedLine* getHead() {return chainHead;}
-  inline directedLine* getTail() {return chainTail;}
-  
-  inline void resetCurrent() { current = ((isIncrease==1)? chainHead:chainTail);}
-
-  void deleteLoop();
-  void deleteLoopList();
-
-  //insert a new chain between prev and this
-  void insert(monoChain* nc);
-
-  Int numChainsSingleLoop();
-  Int numChainsAllLoops();
-  monoChain** toArrayAllLoops(Int& num_chains);
-  Int toArraySingleLoop(monoChain** array, Int index);
-
-  Int isKey;
-  Real keyY; //the current horizotal line  
-  Real chainIntersectHoriz(Real y); //updates current incrementally for efficiency
-  directedLine* find(Real y);//find dline so that y intersects dline.
-
-  void printOneChain();
-  void printChainLoop();
-  void printAllLoops();
-    
-};
-
-monoChain* directedLineLoopToMonoChainLoop(directedLine* loop);
-monoChain* directedLineLoopListToMonoChainLoopList(directedLine* list);
-Int MC_sweepY(Int nVertices, monoChain** sortedVertices, sweepRange** ret_ranges);
-
-void MC_findDiagonals(Int total_num_edges, monoChain** sortedVertices,
-		   sweepRange** ranges, Int& num_diagonals, 
-		   directedLine** diagonal_vertices);
-
-directedLine* MC_partitionY(directedLine *polygons, sampledLine **retSampledLines);
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.cc b/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.cc
deleted file mode 100644
index 8391205bf7c..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.cc
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
- *monoPolyPart.C
- *
- *To partition a v-monotone polygon into some uv-monotone polygons.
- *The algorithm is different from the general monotone partition algorithm.
- *while the general monotone partition algorithm works for this special case,
- *but it is more expensive (O(nlogn)). The algorithm implemented here takes
- *advantage of the fact that the input is a v-monotone polygon and it is
- *conceptually simpler and  computationally cheaper (a linear time algorithm).
- *The algorithm is described in Zicheng Liu's  paper
- * "Quality-Oriented Linear Time Tessellation".
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "directedLine.h"
-#include "monoPolyPart.h"
-
-/*a vertex is u_maximal if both of its two neightbors are to the left of this 
- *vertex
- */
-static Int is_u_maximal(directedLine* v)
-{
-  if (compV2InX(v->getPrev()->head(), v->head()) == -1 &&
-      compV2InX(v->getNext()->head(), v->head()) == -1)
-    return 1;
-  else
-    return 0;
-}
-
-/*a vertex is u_minimal if both of its two neightbors are to the right of this 
- *vertex
- */
-static Int is_u_minimal(directedLine* v)
-{
-  if (compV2InX(v->getPrev()->head(), v->head()) == 1 &&
-      compV2InX(v->getNext()->head(), v->head()) == 1)
-    return 1;
-  else
-    return 0;
-}
-
-/*poly: a v-monotone polygon
- *return: a linked list of uv-monotone polygons.
- */
-directedLine* monoPolyPart(directedLine* polygon)
-{
-  //handle special cases:
-  if(polygon == NULL)
-    return NULL;
-  if(polygon->getPrev() == polygon)
-    return polygon;
-  if(polygon->getPrev() == polygon->getNext())
-    return polygon;
-  if(polygon->getPrev()->getPrev() == polygon->getNext())
-    return polygon;
-
-  //find the top and bottom vertexes
-  directedLine *tempV, *topV, *botV;
-  topV = botV = polygon;
-  for(tempV = polygon->getNext(); tempV != polygon; tempV = tempV->getNext())
-    {
-      if(compV2InY(topV->head(), tempV->head())<0) {
-	topV = tempV;
-      }
-      if(compV2InY(botV->head(), tempV->head())>0) {
-	botV = tempV;
-      }
-    }
-
-  //initilization
-  directedLine *A, *B, *C, *D, *G, *H;
-  //find A:the first u_maximal vertex on the left chain
-  //and C: the left most vertex between top and A
-  A = NULL;
-  C = topV;
-  for(tempV=topV->getNext(); tempV != botV; tempV = tempV->getNext())
-    {
-      if(tempV->head()[0] < C->head()[0])
-	C = tempV;
-
-      if(is_u_maximal(tempV))
-	{
-	  A = tempV;
-	  break;
-	}
-    }
-  if(A == NULL)
-    {
-      A = botV;
-      if(A->head()[0] < C->head()[0])
-	C = A;
-    }
-      
-  //find B: the first u_minimal vertex on the right chain
-  //and  D: the right most vertex between top and B
-  B = NULL;
-  D = topV;
-  for(tempV=topV->getPrev(); tempV != botV; tempV = tempV->getPrev())
-    {
-      if(tempV->head()[0] > D->head()[0])
-	D = tempV;
-      if(is_u_minimal(tempV))
-	{
-	  B = tempV;
-	  break;
-	}
-    }
-  if(B == NULL)
-    {
-      B = botV;
-      if(B->head()[0] > D->head()[0])
-	D = B;
-    }
-
-  //error checking XXX
-  if(C->head()[0] >= D->head()[0])
-    return polygon;
-
-  //find G on the left chain that is right above B
-  for(tempV=topV; compV2InY(tempV->head(), B->head()) == 1;  tempV=tempV->getNext());
-  G = tempV->getPrev();
-  //find H on the right chain that is right above A
-  for(tempV=topV; compV2InY(tempV->head(), A->head()) == 1; tempV = tempV->getPrev());
-  H = tempV->getNext();
-  
-  //Main Loop
-  directedLine* ret = NULL;
-  directedLine* currentPolygon = polygon;
-  while(1)
-    {
-      //if both B and D are equal to botV, then this polygon is already 
-      //u-monotone
-      if(A == botV && B == botV)
-	{
-	  ret = currentPolygon->insertPolygon(ret);
-	  return ret;
-	}
-      else //not u-monotone
-	{
-	  directedLine *ret_p1, *ret_p2;
-	  if(compV2InY(A->head(),B->head()) == 1) //A is above B
-	    {
-	      directedLine* E = NULL;
-	      for(tempV = C; tempV != D; tempV = tempV->getPrev())
-		{
-		  if(tempV->head()[0] >= A->head()[0])
-		    {
-		      E = tempV;
-		      break;
-		    }
-		}
-
-	      if(E == NULL)
-		E = D;
-	      if(E->head()[0]> H->head()[0])
-		E = H;
-	      //connect AE and output polygon ECA
-	      polygon->connectDiagonal_2slines(A, E,
-					       &ret_p1,
-					       &ret_p2,
-					       NULL);
-	      ret = ret_p2->insertPolygon(ret);
-	      currentPolygon = ret_p1;
-
-	      if(E == D)
-		D = ret_p1;
-	      if(E == H)
-		H = ret_p1;
-              if(G->head()[1] >= A->head()[1])
-		G = A;
-	      //update A to be the next u-maxiaml vertex on left chain
-	      //and C the leftmost vertex between the old A and the new A
-	      C = A;
-	      for(tempV = A->getNext(); tempV != botV; tempV = tempV->getNext())
-		{
-
-		  if(tempV->head()[0] < C->head()[0])
-		    C = tempV;
-		  if(is_u_maximal(tempV))
-		    {
-		      A = tempV;
-		      break;
-		    }
-		}
-
-	      if(tempV == botV)
-		{
-		  A = botV;
-		  if(botV->head()[0] < C->head()[0])
-		    C = botV;
-		}
-	      //update H
-
-              if(A == botV)
-		H = botV;
-              else
-		{
-		  for(tempV = H; compV2InY(tempV->head(), A->head()) == 1; tempV = tempV->getPrev());
-		  H = tempV->getNext();
-		}
-
-	    }
-	  else //A is below B
-	    {
-
-	      directedLine* F = NULL;
-	      for(tempV = D; tempV != C; tempV = tempV->getNext())
-		{
-		  if(tempV->head()[0] <= B->head()[0])
-		    {
-		      F = tempV;
-		      break;
-		    }
-		}
-	      if(F == NULL)
-		F = C;
-	      if(F->head()[0] < G->head()[0])
-		F = G;
-
-	      //connect FB
-	      polygon->connectDiagonal_2slines(F, B, 
-					       &ret_p1,
-					       &ret_p2,
-					       NULL);
-	      ret = ret_p2->insertPolygon(ret);
-	      currentPolygon = ret_p1;
-	      B = ret_p1;
-	      if(H ->head()[1] >= B->head()[1])
-		H = ret_p1;
-
-	      //update B to be the next u-minimal vertex on right chain
-	      //and D the rightmost vertex between the old B and the new B
-	      D = B;
-	      for(tempV = B->getPrev(); tempV != botV; tempV = tempV->getPrev())
-		{
-		  if(tempV->head()[0] > D->head()[0])
-		    D = tempV;
-		  if(is_u_minimal(tempV))
-		    {
-		      B = tempV;
-		      break;
-		    }
-		}
-	      if(tempV == botV)
-		{
-		  B = botV;
-		  if(botV->head()[0] > D->head()[0])
-		    D = botV;
-		}
-	      //update G
-              if(B == botV)
-		G = botV; 
-              else
-		{
-		  for(tempV = G; compV2InY(tempV->head(), B->head()) == 1;  tempV = tempV->getNext());
-		  G = tempV->getPrev();
-		}
-	    } //end of A is below B
-	} //end not u-monotone	
-    } //end of main loop
-}
-
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h b/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h
deleted file mode 100644
index 6877a59c27a..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
- *monoPolyPart.h
- */
-
-#ifndef _MONO_POLY_PART_H
-#define _MONO_POLY_PART_H
- 
-class directedLine;
-
-directedLine* monoPolyPart(directedLine* polygon);
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc b/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc
deleted file mode 100644
index 8e8d49dda70..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc
+++ /dev/null
@@ -1,1482 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "gluos.h"
-#include "glimports.h"
-#include "zlassert.h"
-
-#include "monoTriangulation.h"
-#include "polyUtil.h" /*for area*/
-#include "partitionX.h"
-#include "monoPolyPart.h"
-
-
-
-extern  directedLine*  polygonConvert(directedLine* polygon);
-
-/*poly is NOT deleted
- */
-void monoTriangulationOpt(directedLine* poly, primStream* pStream)
-{
-  Int n_cusps;
-  Int n_edges = poly->numEdges();
-  directedLine** cusps = (directedLine**) malloc(sizeof(directedLine*)*n_edges);
-  assert(cusps);
-  findInteriorCuspsX(poly, n_cusps, cusps);
-  if(n_cusps ==0) //u monotine
-    {
-      monoTriangulationFun(poly, compV2InX, pStream);
-    }
-  else if(n_cusps == 1) // one interior cusp
-    {
-      directedLine* new_polygon = polygonConvert(cusps[0]);
-      directedLine* other = findDiagonal_singleCuspX(new_polygon);
-      //<other> should NOT be null unless there are self-intersecting
-      //trim curves. In that case, we don't want to core dump, instead,
-      //we triangulate anyway, and print out error message.
-      if(other == NULL)
-	{
-	  monoTriangulationFun(poly, compV2InX, pStream);
-	}
-      else
-	{
-	  directedLine* ret_p1;
-	  directedLine* ret_p2;
-	  
-	  new_polygon->connectDiagonal_2slines(new_polygon, other, 
-					       &ret_p1,
-					       &ret_p2,
-					       new_polygon);
-	  
-	  monoTriangulationFun(ret_p1, compV2InX, pStream);
-	  monoTriangulationFun(ret_p2, compV2InX, pStream);
-	  
-	  ret_p1->deleteSinglePolygonWithSline();	      
-	  ret_p2->deleteSinglePolygonWithSline();	  
-	}
-    }
-  else
-    {
-      //we need a general partitionX funtion (supposed to be in partitionX.C,
-      //not implemented yet. XXX
-      monoTriangulationFun(poly, compV2InY, pStream);    
-    }
-  
-  free(cusps);
-}
-
-void monoTriangulationRecOpt(Real* topVertex, Real* botVertex, 
-			     vertexArray* left_chain, Int left_current,
-			     vertexArray* right_chain, Int right_current,
-			     primStream* pStream)
-{
-  Int i,j;
-  Int n_left = left_chain->getNumElements();
-  Int n_right = right_chain->getNumElements();
-  if(left_current>= n_left-1 ||
-     right_current>= n_right-1)
-    {
-      monoTriangulationRec(topVertex, botVertex, left_chain, left_current,
-			   right_chain, right_current, pStream);
-      return;
-    }
-  //now both left and right  have at least two vertices each.
-  Real left_v = left_chain->getVertex(left_current)[1];
-  Real right_v = right_chain->getVertex(right_current)[1];
- 
-  if(left_v <= right_v) //first left vertex is below right
-    {
-      //find the last vertex of right which is above or equal to left
-      for(j=right_current; j<=n_right-1; j++)
-	{
-	  if(right_chain->getVertex(j)[1] < left_v)
-	    break;
-	}
-      monoTriangulationRecGen(topVertex, left_chain->getVertex(left_current),
-			      left_chain, left_current, left_current,
-			      right_chain, right_current, j-1,
-			      pStream);
-      monoTriangulationRecOpt(right_chain->getVertex(j-1),
-			      botVertex,
-			      left_chain, left_current,
-			      right_chain, j,
-			      pStream);
-    }
-  else //first right vertex is strictly below left
-    {
-      //find the last vertex of left which is strictly above right
-      for(i=left_current; i<=n_left-1; i++)
-	{
-	  if(left_chain->getVertex(i)[1] <= right_v)
-	    break;
-	}
-      monoTriangulationRecGen(topVertex, right_chain->getVertex(right_current),
-			      left_chain, left_current, i-1,
-			      right_chain, right_current, right_current,
-			      pStream);
-      monoTriangulationRecOpt(left_chain->getVertex(i-1),
-			      botVertex,
-			      left_chain, i,
-			      right_chain, right_current,
-			      pStream);
-    }
-}
-
-
-void monoTriangulationRecGenTBOpt(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current, Int inc_end,
-			  vertexArray* dec_chain, Int dec_current, Int dec_end,
-			  primStream* pStream)
-{
-  pStream->triangle(topVertex, inc_chain->getVertex(inc_current), dec_chain->getVertex(dec_current));
-  
-/*printf("**(%f,%f)\n", inc_chain->getArray()[0][0],inc_chain->getArray()[0][1]);*/
-  triangulateXYMonoTB(inc_end-inc_current+1, inc_chain->getArray()+inc_current,  dec_end-dec_current+1,  dec_chain->getArray()+dec_current, pStream);
-
-  pStream->triangle(botVertex, dec_chain->getVertex(dec_end), inc_chain->getVertex(inc_end));
-}
-  
-
-/*n_left>=1
- *n_right>=1
- *the strip is going top to bottom. compared to the funtion
- * triangulateXYmono()
- */
-void triangulateXYMonoTB(Int n_left, Real** leftVerts,
-		       Int n_right, Real** rightVerts,
-		       primStream* pStream)
-{
-
-
-  Int i,j,k,l;
-  Real* topMostV;
-
-  assert(n_left>=1 && n_right>=1);
-  if(leftVerts[0][1] >= rightVerts[0][1])
-    {
-      i=1;
-      j=0;
-      topMostV = leftVerts[0];
-    }
-  else
-    {
-      i=0;
-      j=1;
-      topMostV = rightVerts[0];
-    }
-  
-  while(1)
-    {
-      if(i >= n_left) /*case1: no more in left*/
-	{
-
-	  if(j<n_right-1) /*at least two vertices in right*/
-	    {
-	      pStream->begin();
-	      pStream->insert(topMostV);
-	      for(k=n_right-1; k>=j; k--)		
-		pStream->insert(rightVerts[j]);
-
-	      pStream->end(PRIMITIVE_STREAM_FAN);
-	      
-	    }
-
-	  break;	
-	}
-      else if(j>= n_right) /*case2: no more in right*/
-	{
-
-	  if(i<n_left-1) /*at least two vertices in left*/
-	    {
-	      pStream->begin();
-	      pStream->insert(topMostV);
-
-	      for(k=i; k<n_left; k++)
-		pStream->insert(leftVerts[k]);
-
-	      pStream->end(PRIMITIVE_STREAM_FAN);	      
-	    }
-
-	  break;
-	}
-      else /* case3: neither is empty, plus the topMostV, there is at least one triangle to output*/
-	{
-
-	  if(leftVerts[i][1] >=  rightVerts[j][1])
-	    {
-	      pStream->begin();
-	      pStream->insert(rightVerts[j]); /*the origin of this fan*/
-
-	      pStream->insert(topMostV);
-
-	      /*find the last k>=i such that 
-	       *leftverts[k][1] >= rightverts[j][1]
-	       */
-	      k=i;
-	      while(k<n_left)
-		{
-		  if(leftVerts[k][1] < rightVerts[j][1])
-		    break;
-		  k++;
-		}
-	      k--;
-	      for(l=i; l<=k; l++)
-		{
-		  pStream->insert(leftVerts[l]);
-		}
-
-	      pStream->end(PRIMITIVE_STREAM_FAN);
-	      //update i for next loop
-	      i = k+1;
-	      topMostV = leftVerts[k];
-
-	    }
-	  else /*leftVerts[i][1] < rightVerts[j][1]*/
-	    {
-	      pStream->begin();
-	      pStream->insert(leftVerts[i]);/*the origion of this fan*/
-
-	      /*find the last k>=j such that
-	       *rightverts[k][1] > leftverts[i][1]*/
-	      k=j;
-	      while(k< n_right)
-		{
-		  if(rightVerts[k][1] <= leftVerts[i][1])
-		    break;
-		  k++;
-		}
-	      k--;
-
-	      for(l=k; l>= j; l--)
-		pStream->insert(rightVerts[l]);
-
-	      pStream->insert(topMostV);
-	      pStream->end(PRIMITIVE_STREAM_FAN);
-	      j=k+1;
-	      topMostV = rightVerts[j-1];
-	    }	  
-	}
-    }
-}
-
-static int chainConvex(vertexArray* inc_chain, Int inc_current, Int inc_end)
-{
-  Int i;
-  //if there are no more than 2 vertices, return 1
-  if(inc_current >= inc_end-1) return 1;
-  for(i=inc_current; i<= inc_end-2; i++)
-    {
-      if(area(inc_chain->getVertex(i), inc_chain->getVertex(i+1), inc_chain->getVertex(i+2)) <0)
-	return 0;
-    }
-  return 1;
-}
-
-static int chainConcave(vertexArray* dec_chain, Int dec_current, Int dec_end)
-{
-  Int i;
-  //if there are no more than 2 vertices, return 1
-  if(dec_current >= dec_end -1) return 1;
-  for(i=dec_current; i<=dec_end-2; i++)
-    {
-      if(area(dec_chain->getVertex(i), dec_chain->getVertex(i+1), dec_chain->getVertex(i+2)) >0)
-	return 0;
-    }
-  return 1;
-}
- 
-void monoTriangulationRecGenInU(Real* topVertex, Real* botVertex,
-				vertexArray* inc_chain, Int inc_current, Int inc_end,
-				vertexArray* dec_chain, Int dec_current, Int dec_end,
-				primStream* pStream)
-{
-  
-}
-
-void  monoTriangulationRecGenOpt(Real* topVertex, Real* botVertex,
-				 vertexArray* inc_chain, Int inc_current, Int inc_end,
-				 vertexArray* dec_chain, Int dec_current, Int dec_end,
-				 primStream* pStream)
-{
-  Int i;
-  //copy this to a polygon: directedLine Lioop
-  sampledLine* sline;
-  directedLine* dline;
-  directedLine* poly;
-
-  if(inc_current <= inc_end) //at least one vertex in inc_chain
-    {      
-      sline = new sampledLine(topVertex, inc_chain->getVertex(inc_current));
-      poly = new directedLine(INCREASING, sline);
-      for(i=inc_current; i<=inc_end-1; i++)
-	{
-	  sline = new sampledLine(inc_chain->getVertex(i), inc_chain->getVertex(i+1));
-	  dline = new directedLine(INCREASING, sline);
-	  poly->insert(dline);
-	}
-      sline = new sampledLine(inc_chain->getVertex(inc_end), botVertex);
-      dline = new directedLine(INCREASING, sline);
-      poly->insert(dline);
-    }
-  else //inc_chian is empty
-    {
-      sline = new sampledLine(topVertex, botVertex);
-      dline = new directedLine(INCREASING, sline);
-      poly = dline;
-    }
-  
-  assert(poly != NULL);
-
-  if(dec_current <= dec_end) //at least on vertex in dec_Chain
-    {
-      sline = new sampledLine(botVertex, dec_chain->getVertex(dec_end));
-      dline = new directedLine(INCREASING, sline);
-      poly->insert(dline);
-      for(i=dec_end; i>dec_current; i--)
-	{
-	  sline = new sampledLine(dec_chain->getVertex(i), dec_chain->getVertex(i-1));
-	  dline = new directedLine(INCREASING, sline);
-	  poly->insert(dline);
-	}
-      sline = new sampledLine(dec_chain->getVertex(dec_current), topVertex);
-      dline = new directedLine(INCREASING, sline);
-      poly->insert(dline);      
-    }
-  else //dec_chain  is empty
-    {
-      sline = new sampledLine(botVertex, topVertex);
-      dline = new directedLine(INCREASING, sline);
-      poly->insert(dline);
-    }
-
-  {
-    Int n_cusps;
-    Int n_edges = poly->numEdges();
-    directedLine** cusps = (directedLine**) malloc(sizeof(directedLine*)*n_edges);
-    assert(cusps);
-    findInteriorCuspsX(poly, n_cusps, cusps);
-
-    if(n_cusps ==0) //u monotine
-      {
-	monoTriangulationFun(poly, compV2InX, pStream);
-      }
-    else if(n_cusps == 1) // one interior cusp
-      {
-	directedLine* new_polygon = polygonConvert(cusps[0]);
-	directedLine* other = findDiagonal_singleCuspX(new_polygon);
-	  //<other> should NOT be null unless there are self-intersecting
-          //trim curves. In that case, we don't want to core dump, instead,
-          //we triangulate anyway, and print out error message.
-	  if(other == NULL)
-	    {
-	      monoTriangulationFun(poly, compV2InX, pStream);
-	    }
-	  else
-	    {
-	      directedLine* ret_p1;
-	      directedLine* ret_p2;
-	      
-	      new_polygon->connectDiagonal_2slines(new_polygon, other, 
-						   &ret_p1,
-						   &ret_p2,
-						   new_polygon);
-	      
-	      monoTriangulationFun(ret_p1, compV2InX, pStream);
-	      monoTriangulationFun(ret_p2, compV2InX, pStream);
-
-	      ret_p1->deleteSinglePolygonWithSline();	      
-	      ret_p2->deleteSinglePolygonWithSline();	  
-	    }
-      }
-    else
-      {
-	//we need a general partitionX funtion (supposed to be in partitionX.C,
-	//not implemented yet. XXX
-	//monoTriangulationFun(poly, compV2InY, pStream);    
-	
-	directedLine* new_polygon = polygonConvert(poly);
-	directedLine* list = monoPolyPart(new_polygon);
-	for(directedLine* temp = list; temp != NULL; temp = temp->getNextPolygon())
-	  { 
-	    monoTriangulationFun(temp, compV2InX, pStream);
-	  }
-	//clean up
-	list->deletePolygonListWithSline();
-        
-      }
-
-    free(cusps);
-    /*
-      if(numInteriorCuspsX(poly) == 0) //is u monotone
-	monoTriangulationFun(poly, compV2InX, pStream);
-      else //it is not u motone
-	monoTriangulationFun(poly, compV2InY, pStream);    
-	*/
-    //clean up space
-    poly->deleteSinglePolygonWithSline();
-    return;
-  }
-      
-  //apparently the following code is not reachable, 
-  //it is for test purpose
-  if(inc_current > inc_end || dec_current>dec_end)
-    {
-    monoTriangulationRecGen(topVertex, botVertex, inc_chain, inc_current, inc_end,
-			    dec_chain, dec_current, dec_end,
-			    pStream);    
-    return;
-  }
-  
-
-  if(
-     area(dec_chain->getVertex(dec_current),
-	  topVertex,
-	  inc_chain->getVertex(inc_current)) >=0
-     && chainConvex(inc_chain, inc_current, inc_end)
-     && chainConcave(dec_chain, dec_current, dec_end)
-     && area(inc_chain->getVertex(inc_end), botVertex, dec_chain->getVertex(dec_end)) >=0
-     )
-    {
-      monoTriangulationRecFunGen(topVertex, botVertex, 
-				 inc_chain, inc_current, inc_end,
-				 dec_chain, dec_current, dec_end, 
-				 compV2InX, pStream);
-    }
-  else
-    {
-      monoTriangulationRecGen(topVertex, botVertex, inc_chain, inc_current, inc_end,
-			      dec_chain, dec_current, dec_end,
-			      pStream);
-    }
-}
-
-/*if inc_current>inc_end, then inc_chain has no points to be considered
- *same for dec_chain
- */
-void monoTriangulationRecGen(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current, Int inc_end,
-			  vertexArray* dec_chain, Int dec_current, Int dec_end,
-			  primStream* pStream)
-{
-  Real** inc_array ;
-  Real** dec_array ;
-  Int i;
-
-  if(inc_current > inc_end && dec_current>dec_end)
-    return;
-  else if(inc_current>inc_end) /*no more vertices on inc_chain*/
-    {
-      dec_array = dec_chain->getArray();
-      reflexChain rChain(100,0);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the dec_chain*/
-      for(i=dec_current; i<=dec_end; i++){
-	rChain.processNewVertex(dec_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-    }
-  else if(dec_current> dec_end) /*no more vertices on dec_chain*/
-    {
-      inc_array = inc_chain->getArray();
-
-      reflexChain rChain(100,1);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the inc_chain*/
-      for(i=inc_current; i<=inc_end; i++){
-	rChain.processNewVertex(inc_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-    }
-  else /*neither chain is empty*/
-    {
-      inc_array = inc_chain -> getArray();
-      dec_array = dec_chain -> getArray();
-
-      /*if top of inc_chain is 'lower' than top of dec_chain, process all the 
-       *vertices on the dec_chain which are higher than top of inc_chain
-       */
-      if(compV2InY(inc_array[inc_current], dec_array[dec_current]) <= 0)
-	{
-
-	  reflexChain rChain(100, 0);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=dec_current; i<=dec_end; i++)
-	    {
-	      if(compV2InY(inc_array[inc_current], dec_array[i]) <= 0)
-		rChain.processNewVertex(dec_array[i], pStream);
-	      else 
-		break;
-	    }
-	  rChain.outputFan(inc_array[inc_current], pStream);
-	  monoTriangulationRecGen(dec_array[i-1], botVertex, 
-			       inc_chain, inc_current, inc_end,
-			       dec_chain, i, dec_end,
-			       pStream);
-	}
-      else /*compV2InY(inc_array[inc_current], dec_array[dec_current]) > 0*/
-	{
-
-	  reflexChain rChain(100, 1);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=inc_current; i<=inc_end; i++)
-	    {
-	      if(compV2InY(inc_array[i], dec_array[dec_current]) >0)		
-		rChain.processNewVertex(inc_array[i], pStream);	      
-	      else
-		break;
-	    }
-	  rChain.outputFan(dec_array[dec_current], pStream);
-	  monoTriangulationRecGen(inc_array[i-1], botVertex, 
-			       inc_chain, i, inc_end,
-			       dec_chain, dec_current,dec_end,
-			       pStream);
-	}
-    }/*end case neither is empty*/
-}
-
-void monoTriangulationFun(directedLine* monoPolygon, Int (*compFun)(Real*, Real*), primStream* pStream)
-{
-  Int i;
-  /*find the top vertex, bottom vertex, inccreasing chain, and decreasing chain,
-   *then call monoTriangulationRec
-   */
-  directedLine* tempV;
-  directedLine* topV;
-  directedLine* botV;
-  topV = botV = monoPolygon;
-  for(tempV = monoPolygon->getNext(); tempV != monoPolygon; tempV = tempV->getNext())
-    {
-      if(compFun(topV->head(), tempV->head())<0) {
-	topV = tempV;
-      }
-      if(compFun(botV->head(), tempV->head())>0) {
-	botV = tempV;
-      }
-    }
-
-  /*creat increase and decrease chains*/
-  vertexArray inc_chain(20); /*this is a dynamic array*/
-  for(i=1; i<=topV->get_npoints()-2; i++) { /*the first vertex is the top vertex which doesn't belong to inc_chain*/
-    inc_chain.appendVertex(topV->getVertex(i));
-  }
-  for(tempV = topV->getNext(); tempV != botV; tempV = tempV->getNext())
-    {
-      for(i=0; i<=tempV->get_npoints()-2; i++){
-	inc_chain.appendVertex(tempV->getVertex(i));
-      }
-    }
-  
-  vertexArray dec_chain(20);
-  for(tempV = topV->getPrev(); tempV != botV; tempV = tempV->getPrev())
-    {
-      for(i=tempV->get_npoints()-2; i>=0; i--){
-	dec_chain.appendVertex(tempV->getVertex(i));
-      }
-    }
-  for(i=botV->get_npoints()-2; i>=1; i--){ 
-    dec_chain.appendVertex(tempV->getVertex(i));
-  }
-  
-  if (!(0 == inc_chain.getNumElements() && 0 == dec_chain.getNumElements())) {
-     monoTriangulationRecFun(topV->head(), botV->head(), &inc_chain, 0,
-                             &dec_chain, 0, compFun, pStream);
-  }
-}  
-
-void monoTriangulation(directedLine* monoPolygon, primStream* pStream)
-{
-  Int i;
-  /*find the top vertex, bottom vertex, inccreasing chain, and decreasing chain,
-   *then call monoTriangulationRec
-   */
-  directedLine* tempV;
-  directedLine* topV;
-  directedLine* botV;
-  topV = botV = monoPolygon;
-  for(tempV = monoPolygon->getNext(); tempV != monoPolygon; tempV = tempV->getNext())
-    {
-      if(compV2InY(topV->head(), tempV->head())<0) {
-	topV = tempV;
-      }
-      if(compV2InY(botV->head(), tempV->head())>0) {
-	botV = tempV;
-      }
-    }
-  /*creat increase and decrease chains*/
-  vertexArray inc_chain(20); /*this is a dynamic array*/
-  for(i=1; i<=topV->get_npoints()-2; i++) { /*the first vertex is the top vertex which doesn't belong to inc_chain*/
-    inc_chain.appendVertex(topV->getVertex(i));
-  }
-  for(tempV = topV->getNext(); tempV != botV; tempV = tempV->getNext())
-    {
-      for(i=0; i<=tempV->get_npoints()-2; i++){
-	inc_chain.appendVertex(tempV->getVertex(i));
-      }
-    }
-  
-  vertexArray dec_chain(20);
-  for(tempV = topV->getPrev(); tempV != botV; tempV = tempV->getPrev())
-    {
-      for(i=tempV->get_npoints()-2; i>=0; i--){
-	dec_chain.appendVertex(tempV->getVertex(i));
-      }
-    }
-  for(i=botV->get_npoints()-2; i>=1; i--){ 
-    dec_chain.appendVertex(tempV->getVertex(i));
-  }
-  
-  monoTriangulationRec(topV->head(), botV->head(), &inc_chain, 0, &dec_chain, 0, pStream);
-
-}
-
-/*the chain could be increasing or decreasing, although we use the
- * name inc_chain.
- *the argument  is_increase_chain indicates whether this chain
- *is increasing (left chain in V-monotone case) or decreaing (right chain
- *in V-monotone case).
- */
-void monoTriangulation2(Real* topVertex, Real* botVertex, 
-			vertexArray* inc_chain, Int inc_smallIndex,
-			Int inc_largeIndex,
-			Int is_increase_chain,
-			primStream* pStream)
-{
-  assert( inc_chain != NULL);
-  Real** inc_array ;
-
-  if(inc_smallIndex > inc_largeIndex)
-    return; //no triangles 
-  if(inc_smallIndex == inc_largeIndex)
-    {
-      if(is_increase_chain)
-	pStream->triangle(inc_chain->getVertex(inc_smallIndex), botVertex, topVertex);
-      else
-	pStream->triangle(inc_chain->getVertex(inc_smallIndex), topVertex, botVertex);	
-      return;
-    }
-  Int i;
-
-  if(is_increase_chain && botVertex[1] == inc_chain->getVertex(inc_largeIndex)[1])
-    {
-      pStream->triangle(botVertex, inc_chain->getVertex(inc_largeIndex-1),
-			inc_chain->getVertex(inc_largeIndex));
-      monoTriangulation2(topVertex, botVertex, inc_chain, inc_smallIndex,
-			 inc_largeIndex-1,
-			 is_increase_chain,
-			 pStream);
-      return;
-    }
-  else if( (!is_increase_chain) && topVertex[1] == inc_chain->getVertex(inc_smallIndex)[1])
-    {
-      pStream->triangle(topVertex, inc_chain->getVertex(inc_smallIndex+1),
-			inc_chain->getVertex(inc_smallIndex));
-      monoTriangulation2(topVertex, botVertex, inc_chain, inc_smallIndex+1,
-			 inc_largeIndex, is_increase_chain, pStream);
-      return ;
-    }		           
-
-  inc_array = inc_chain->getArray();
-
-  reflexChain rChain(20,is_increase_chain); /*1 means the chain is increasing*/
-
-  rChain.processNewVertex(topVertex, pStream);
-
-  for(i=inc_smallIndex; i<=inc_largeIndex; i++){
-    rChain.processNewVertex(inc_array[i], pStream);
-  }
-  rChain.processNewVertex(botVertex, pStream);
-
-}
- 
-/*if compFun == compV2InY, top to bottom: V-monotone
- *if compFun == compV2InX, right to left: U-monotone
- */
-void monoTriangulationRecFunGen(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current, Int inc_end,
-			  vertexArray* dec_chain, Int dec_current, Int dec_end,
-			  Int  (*compFun)(Real*, Real*),
-			  primStream* pStream)
-{
-  assert( inc_chain != NULL && dec_chain != NULL);
-  assert( ! (inc_current> inc_end &&
-	     dec_current> dec_end));
-  /*
-  Int inc_nVertices;
-  Int dec_nVertices;
-  */
-  Real** inc_array ;
-  Real** dec_array ;
-  Int i;
-  assert( ! ( (inc_chain==NULL) && (dec_chain==NULL)));
-
-  if(inc_current> inc_end) /*no more vertices on inc_chain*/
-    {
-
-      dec_array = dec_chain->getArray();
-      reflexChain rChain(20,0);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the dec_chain*/
-      for(i=dec_current; i<=dec_end; i++){
-	rChain.processNewVertex(dec_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-
-    }
-  else if(dec_current> dec_end) /*no more vertices on dec_chain*/
-    {
-      inc_array = inc_chain->getArray();
-      reflexChain rChain(20,1);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the inc_chain*/
-      for(i=inc_current; i<=inc_end; i++){
-	rChain.processNewVertex(inc_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-    }
-  else /*neither chain is empty*/
-    {
-      inc_array = inc_chain -> getArray();
-      dec_array = dec_chain -> getArray();
-
-      /*if top of inc_chain is 'lower' than top of dec_chain, process all the 
-       *vertices on the dec_chain which are higher than top of inc_chain
-       */
-      if(compFun(inc_array[inc_current], dec_array[dec_current]) <= 0)
-	{
-
-	  reflexChain rChain(20, 0);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=dec_current; i<=dec_end; i++)
-	    {
-	      if(compFun(inc_array[inc_current], dec_array[i]) <= 0)
-		rChain.processNewVertex(dec_array[i], pStream);
-	      else 
-		break;
-	    }
-	  rChain.outputFan(inc_array[inc_current], pStream);
-	  monoTriangulationRecFunGen(dec_array[i-1], botVertex, 
-			       inc_chain, inc_current, inc_end,
-			       dec_chain, i, dec_end,
-			       compFun,
-			       pStream);
-	}
-      else /*compFun(inc_array[inc_current], dec_array[dec_current]) > 0*/
-	{
-
-	  reflexChain rChain(20, 1);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=inc_current; i<=inc_end; i++)
-	    {
-	      if(compFun(inc_array[i], dec_array[dec_current]) >0)		
-		rChain.processNewVertex(inc_array[i], pStream);	      
-	      else
-		break;
-	    }
-	  rChain.outputFan(dec_array[dec_current], pStream);
-	  monoTriangulationRecFunGen(inc_array[i-1], botVertex, 
-			       inc_chain, i,inc_end,
-			       dec_chain, dec_current,dec_end,
-			       compFun,
-			       pStream);
-	}
-    }/*end case neither is empty*/
-}
-   
-/*if compFun == compV2InY, top to bottom: V-monotone
- *if compFun == compV2InX, right to left: U-monotone
- */
-void monoTriangulationRecFun(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			  Int  (*compFun)(Real*, Real*),
-			  primStream* pStream)
-{
-  assert( inc_chain != NULL && dec_chain != NULL);
-  assert( ! (inc_current>=inc_chain->getNumElements() &&
-	     dec_current>=dec_chain->getNumElements()));
-  Int inc_nVertices;
-  Int dec_nVertices;
-  Real** inc_array ;
-  Real** dec_array ;
-  Int i;
-  assert( ! ( (inc_chain==NULL) && (dec_chain==NULL)));
-
-  if(inc_current>=inc_chain->getNumElements()) /*no more vertices on inc_chain*/
-    {
-
-      dec_array = dec_chain->getArray();
-      dec_nVertices = dec_chain->getNumElements();      
-      reflexChain rChain(20,0);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the dec_chain*/
-      for(i=dec_current; i<dec_nVertices; i++){
-	rChain.processNewVertex(dec_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-
-    }
-  else if(dec_current>= dec_chain->getNumElements()) /*no more vertices on dec_chain*/
-    {
-      inc_array = inc_chain->getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      reflexChain rChain(20,1);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the inc_chain*/
-      for(i=inc_current; i<inc_nVertices; i++){
-	rChain.processNewVertex(inc_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-    }
-  else /*neither chain is empty*/
-    {
-      inc_array = inc_chain -> getArray();
-      dec_array = dec_chain -> getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      dec_nVertices= dec_chain->getNumElements();
-      /*if top of inc_chain is 'lower' than top of dec_chain, process all the 
-       *vertices on the dec_chain which are higher than top of inc_chain
-       */
-      if(compFun(inc_array[inc_current], dec_array[dec_current]) <= 0)
-	{
-
-	  reflexChain rChain(20, 0);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=dec_current; i<dec_nVertices; i++)
-	    {
-	      if(compFun(inc_array[inc_current], dec_array[i]) <= 0)
-		rChain.processNewVertex(dec_array[i], pStream);
-	      else 
-		break;
-	    }
-	  rChain.outputFan(inc_array[inc_current], pStream);
-	  monoTriangulationRecFun(dec_array[i-1], botVertex, 
-			       inc_chain, inc_current,
-			       dec_chain, i,
-			       compFun,
-			       pStream);
-	}
-      else /*compFun(inc_array[inc_current], dec_array[dec_current]) > 0*/
-	{
-
-	  reflexChain rChain(20, 1);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=inc_current; i<inc_nVertices; i++)
-	    {
-	      if(compFun(inc_array[i], dec_array[dec_current]) >0)		
-		rChain.processNewVertex(inc_array[i], pStream);	      
-	      else
-		break;
-	    }
-	  rChain.outputFan(dec_array[dec_current], pStream);
-	  monoTriangulationRecFun(inc_array[i-1], botVertex, 
-			       inc_chain, i,
-			       dec_chain, dec_current,
-			       compFun,
-			       pStream);
-	}
-    }/*end case neither is empty*/
-}
-
-
-void monoTriangulationRec(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			  primStream* pStream)
-{
-  assert( inc_chain != NULL && dec_chain != NULL);
-  assert( ! (inc_current>=inc_chain->getNumElements() &&
-	     dec_current>=dec_chain->getNumElements()));
-  Int inc_nVertices;
-  Int dec_nVertices;
-  Real** inc_array ;
-  Real** dec_array ;
-  Int i;
-  assert( ! ( (inc_chain==NULL) && (dec_chain==NULL)));
-
-  if(inc_current>=inc_chain->getNumElements()) /*no more vertices on inc_chain*/
-    {
-
-      dec_array = dec_chain->getArray();
-      dec_nVertices = dec_chain->getNumElements();      
-      reflexChain rChain(20,0);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the dec_chain*/
-      for(i=dec_current; i<dec_nVertices; i++){
-	rChain.processNewVertex(dec_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-
-    }
-  else if(dec_current>= dec_chain->getNumElements()) /*no more vertices on dec_chain*/
-    {
-      inc_array = inc_chain->getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      reflexChain rChain(20,1);
-      /*put the top vertex into the reflex chain*/
-      rChain.processNewVertex(topVertex, pStream);
-      /*process all the vertices on the inc_chain*/
-      for(i=inc_current; i<inc_nVertices; i++){
-	rChain.processNewVertex(inc_array[i], pStream);
-      }
-      /*process the bottom vertex*/
-      rChain.processNewVertex(botVertex, pStream);
-    }
-  else /*neither chain is empty*/
-    {
-      inc_array = inc_chain -> getArray();
-      dec_array = dec_chain -> getArray();
-      inc_nVertices= inc_chain->getNumElements();
-      dec_nVertices= dec_chain->getNumElements();
-      /*if top of inc_chain is 'lower' than top of dec_chain, process all the 
-       *vertices on the dec_chain which are higher than top of inc_chain
-       */
-      if(compV2InY(inc_array[inc_current], dec_array[dec_current]) <= 0)
-	{
-
-	  reflexChain rChain(20, 0);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=dec_current; i<dec_nVertices; i++)
-	    {
-	      if(compV2InY(inc_array[inc_current], dec_array[i]) <= 0)
-		rChain.processNewVertex(dec_array[i], pStream);
-	      else 
-		break;
-	    }
-	  rChain.outputFan(inc_array[inc_current], pStream);
-	  monoTriangulationRec(dec_array[i-1], botVertex, 
-			       inc_chain, inc_current,
-			       dec_chain, i,
-			       pStream);
-	}
-      else /*compV2InY(inc_array[inc_current], dec_array[dec_current]) > 0*/
-	{
-
-	  reflexChain rChain(20, 1);
-	  rChain.processNewVertex(topVertex, pStream);
-	  for(i=inc_current; i<inc_nVertices; i++)
-	    {
-	      if(compV2InY(inc_array[i], dec_array[dec_current]) >0)		
-		rChain.processNewVertex(inc_array[i], pStream);	      
-	      else
-		break;
-	    }
-	  rChain.outputFan(dec_array[dec_current], pStream);
-	  monoTriangulationRec(inc_array[i-1], botVertex, 
-			       inc_chain, i,
-			       dec_chain, dec_current,
-			       pStream);
-	}
-    }/*end case neither is empty*/
-}
-    
-
-
-/* the name here assumes that the polygon is Y-monotone, but 
- *this function also works for X-monotone polygons.
- * a monotne polygon consists of two extrem verteices: topVertex and botVertex, and
- *two monotone chains: inc_chain, and dec_chain. The edges of the increasing chain (inc_chain)
- *is ordered by following pointer: next, while  the edges of the decreasing chain (dec_chain)
- *is ordered by following pointer: prev
- * inc_index index the vertex which is the toppest of the inc_chain which we are handling currently.
- * dec_index index the vertex which is the toppest of the dec_chain which we are handling currently.
- */
-void monoTriangulationRec(directedLine* inc_chain, Int inc_index, 
-			  directedLine* dec_chain, Int dec_index, 
-			  directedLine* topVertex, Int top_index,
-			  directedLine* botVertex,
-			  primStream* pStream)
-{
-  Int i;
-  directedLine *temp, *oldtemp = NULL;
-  Int tempIndex, oldtempIndex = 0;
-  
-  assert(inc_chain != NULL && dec_chain != NULL);
-  
-  if(inc_chain == botVertex) {
-    reflexChain rChain(20, 0);
-    rChain.processNewVertex(topVertex->getVertex(top_index), pStream);
-    for(i=dec_index; i< dec_chain->get_npoints(); i++){
-      rChain.processNewVertex(dec_chain->getVertex(i), pStream);
-    }
-    for(temp = dec_chain->getPrev(); temp != botVertex; temp = temp->getPrev())
-      {
-	for(i=0; i<temp->get_npoints(); i++){
-	  rChain.processNewVertex(temp->getVertex(i), pStream);
-	}
-      }
-  }
-  else if(dec_chain==botVertex) {
-    reflexChain rChain(20, 1);
-    rChain.processNewVertex(topVertex->getVertex(top_index), pStream);
-    for(i=inc_index; i< inc_chain->get_npoints(); i++){
-      rChain.processNewVertex(inc_chain->getVertex(i), pStream);
-    }
-    for(temp = inc_chain->getPrev(); temp != botVertex; temp = temp->getNext())
-      {
-	for(i=0; i<temp->get_npoints(); i++){
-	  rChain.processNewVertex(temp->getVertex(i), pStream);
-	}
-      }
-  }
-  else /*neither reached the bottom*/{
-    if(compV2InY(inc_chain->getVertex(inc_index), dec_chain->getVertex(dec_index)) <=0) {
-      reflexChain rChain(20, 0);
-      rChain.processNewVertex(topVertex -> getVertex(top_index), pStream);
-      temp = dec_chain;
-      tempIndex = dec_index;
-      while( compV2InY(inc_chain->getVertex(inc_index), temp->getVertex(tempIndex))<=0) {
-	oldtemp = temp;
-	oldtempIndex = tempIndex;
-	rChain.processNewVertex(temp->getVertex(tempIndex), pStream);
-	
-	if(tempIndex == temp->get_npoints()-1){
-	  tempIndex = 0;
-	  temp = temp->getPrev();
-	}
-	else{
-	  tempIndex++;
-	}
-      }
-      rChain.outputFan(inc_chain->getVertex(inc_index), pStream);
-      monoTriangulationRec(inc_chain, inc_index, temp, tempIndex, oldtemp, oldtempIndex, botVertex, pStream);
-    }
-    else /* >0*/ {
-      reflexChain rChain(20, 1);
-      rChain.processNewVertex(topVertex -> getVertex(top_index), pStream);
-      temp = inc_chain;
-      tempIndex = inc_index;
-      while( compV2InY(temp->getVertex(tempIndex), dec_chain->getVertex(dec_index))>0){
-	oldtemp = temp;
-	oldtempIndex = tempIndex;
-	rChain.processNewVertex(temp->getVertex(tempIndex), pStream);
-	
-	if(tempIndex == temp->get_npoints()-1){
-	  tempIndex = 0;
-	  temp = temp->getNext();
-	}
-	else{
-	  tempIndex++;
-	}
-      }
-      rChain.outputFan(dec_chain->getVertex(dec_index), pStream);
-      monoTriangulationRec(temp, tempIndex, dec_chain, dec_index, oldtemp, oldtempIndex, botVertex, pStream); 
-    }
-  } /*end case neither reached the bottom*/
-}
-
-/***************************vertexArray begin here**********************************/
-vertexArray::vertexArray(Real2* vertices, Int nVertices)
-{
-  Int i;
-  size = index = nVertices;
-  array = (Real**) malloc(sizeof(Real*) * nVertices);
-  assert(array);
-  for(i=0; i<nVertices; i++)
-    {
-      array[i] = vertices[i];
-      array[i] = vertices[i];
-    }
-}
-
-vertexArray::vertexArray(Int s)
-{
-  size = s;
-  array = (Real**) malloc(sizeof(Real*) * s);
-  assert(array);
-  index = 0;
-}
-
-vertexArray::~vertexArray()
-{
-  free(array);
-}
-
-void vertexArray::appendVertex(Real* ptr)
-{
-  Int i;
-  if(index >= size){
-    Real** temp = (Real**) malloc(sizeof(Real*) * (2*size +1));
-    assert(temp);
-    for(i=0; i<index; i++)
-      temp[i] = array[i];
-    free(array);
-    array = temp;
-    size = 2*size+1;
-  }
-  array[index++] = ptr;
-}
-
-void vertexArray::print()
-{
-  printf("vertex Array:index=%i, size=%i\n", index, size);
-  for(Int i=0; i<index; i++)
-    {
-      printf("(%f,%f) ", array[i][0], array[i][1]);
-    }
-  printf("\n");
-}
-
-/*find the first i such that array[i][1] >= v
- * and array[i+1][1] <v
- * if index == 0 (the array is empty, return -1.
- * if v is above all, return -1.
- * if v is below all, return index-1.
- */
-Int vertexArray::findIndexAbove(Real v)
-{
-  Int i;
-  if(index == 0) 
-    return -1;
-  else if(array[0][1] < v)
-    return -1;
-  else
-    {
-      for(i=1; i<index; i++)
-	{
-	  if(array[i][1] < v)
-	    break;
-	}
-      return i-1;
-    }
-}
-
-/*find the first i<=endIndex such that array[i][1] <= v
- * and array[i-1][1] > v
- *if sartIndex>endIndex, then return endIndex+1.
- *otherwise, startIndex<=endIndex, it is assumed that
- * 0<=startIndex<=endIndex<index.
- * if v is below all, return endIndex+1
- * if v is above all, return startIndex.
- */
-Int vertexArray::findIndexBelowGen(Real v, Int startIndex, Int endIndex)
-{
-  Int i;
-  if(startIndex > endIndex) 
-    return endIndex+1;
-  else if(array[endIndex][1] >  v)
-    return endIndex+1;
-  else //now array[endIndex][1] <= v
-    {
-      for(i=endIndex-1; i>=startIndex; i--)
-	{
-	  if(array[i][1] > v)
-	    break;
-	}
-      return i+1;
-    }
-}
-
-/*find the first i<=endIndex such that array[i-1][1] >= v
- * and array[i][1] < v
- *if sartIndex>endIndex, then return endIndex+1.
- *otherwise, startIndex<=endIndex, it is assumed that
- * 0<=startIndex<=endIndex<index.
- * if v is below or equal to all, return endIndex+1
- * if v is strictly above all, return startIndex.
- */
-Int vertexArray::findIndexStrictBelowGen(Real v, Int startIndex, Int endIndex)
-{
-  Int i;
-  if(startIndex > endIndex) 
-    return endIndex+1;
-  else if(array[endIndex][1] >=  v)
-    return endIndex+1;
-  else //now array[endIndex][1] < v
-    {
-      for(i=endIndex-1; i>=startIndex; i--)
-	{
-	  if(array[i][1] >= v)
-	    break;
-	}
-      return i+1;
-    }
-}
-
-/*find the first i>startIndex such that array[i-1][1] > v
- * and array[i][1] >=v
- *if sartIndex>endIndex, then return startIndex-1.
- *otherwise, startIndex<=endIndex, it is assumed that
- * 0<=startIndex<=endIndex<index.
- * if v is strictly above all, return startIndex-1
- * if v is strictly below all, return endIndex.
- */
-Int vertexArray::findIndexFirstAboveEqualGen(Real v, Int startIndex, Int endIndex)
-{
-
-  Int i;
-  if(startIndex > endIndex) 
-    return startIndex-1;
-  else if(array[startIndex][1] < v)
-    return startIndex-1;
-  else //now array[startIndex][1] >= v
-    {
-
-      for(i=startIndex; i<=endIndex; i++)
-	{
-	  if(array[i][1] <= v)
-	    break;
-	}
-      if(i>endIndex) // v is strictly below all
-	return endIndex;
-      else if(array[i][1] == v)
-	return i;
-      else
-	return i-1;
-    }
-
-}
-
-
-/*find the first i>=startIndex such that array[i][1] >= v
- * and array[i+1][1] <v
- *if sartIndex>endIndex, then return startIndex-1.
- *otherwise, startIndex<=endIndex, it is assumed that
- * 0<=startIndex<=endIndex<index.
- * if v is above all, return startIndex-1
- * if v is below all, return endIndex.
- */
-Int vertexArray::findIndexAboveGen(Real v, Int startIndex, Int endIndex)
-{
-  Int i;
-  if(startIndex > endIndex) 
-    return startIndex-1;
-  else if(array[startIndex][1] < v)
-    return startIndex-1;
-  else //now array[startIndex][1] >= v
-    {
-      for(i=startIndex+1; i<=endIndex; i++)
-	{
-	  if(array[i][1] < v)
-	    break;
-	}
-      return i-1;
-    }
-}
-
-Int vertexArray::findDecreaseChainFromEnd(Int begin, Int end)
-{
-  Int i = end;
-  Real prevU = array[i][0];
-  Real thisU;
-  for(i=end-1; i>=begin; i--){
-    thisU = array[i][0];
-    if(thisU < prevU)
-      prevU = thisU;
-    else
-      break;
-  }
-  return i;
-}
-
-//if(V(start) == v, return start, other wise return the
-//last i so that V(i)==v
-Int vertexArray::skipEqualityFromStart(Real v, Int start, Int end)
-{
-  Int i;
-  if(array[start][1] != v)
-    return start;
-  //now array[start][1] == v
-  for(i=start+1; i<= end; i++)
-    if(array[i][1] != v) 
-      break;
-  return i-1;
-}
-  
-
-/***************************vertexArray end****************************************/
-
-
-
-/***************************relfex chain stuff begin here*****************************/
-
-reflexChain::reflexChain(Int size, Int is_increasing)
-{
-  queue = (Real2*) malloc(sizeof(Real2) * size);
-  assert(queue);
-  index_queue = 0;
-  size_queue = size;
-  isIncreasing = is_increasing;
-}
-
-reflexChain::~reflexChain()
-{
-  free(queue);
-}
-
-/*put (u,v) at the end of the queue
- *pay attention to space
- */
-void reflexChain::insert(Real u, Real v)
-{
-  Int i;
-  if(index_queue >= size_queue) {
-    Real2 *temp = (Real2*) malloc(sizeof(Real2) * (2*size_queue+1));
-    assert(temp);
-
-    /*copy*/
-    for(i=0; i<index_queue; i++){
-      temp[i][0] = queue[i][0];
-      temp[i][1] = queue[i][1];
-    }
-    
-    free(queue);
-    queue = temp;
-    size_queue = 2*size_queue + 1;
-  }
-
-  queue[index_queue][0] = u;
-  queue[index_queue][1] = v;
-  index_queue ++;
-}
-
-void reflexChain::insert(Real v[2])
-{
-  insert(v[0], v[1]);
-}
-
-/*
-static Real area(Real A[2], Real B[2], Real C[2])
-{
-  Real Bx, By, Cx, Cy;
-  Bx = B[0] - A[0];
-  By = B[1] - A[1];
-  Cx = C[0] - A[0];
-  Cy = C[1] - A[1];
-  return Bx*Cy - Cx*By;
-}
-*/
-
-/*the chain is reflex, and the vertex v is
- *on the other side of the chain, so that
- *we can outout the fan with v as the
- *the center
- */
-void reflexChain::outputFan(Real v[2], primStream* pStream)
-{
-  Int i;
-  pStream->begin();
-  pStream->insert(v);
-  if(isIncreasing) {
-    for(i=0; i<index_queue; i++)
-      pStream->insert(queue[i]);
-  }
-  else {
-    for(i=index_queue-1; i>=0; i--)
-      pStream->insert(queue[i]);    
-  }
-  pStream->end(PRIMITIVE_STREAM_FAN);
-}
-
-void reflexChain::processNewVertex(Real v[2], primStream* pStream)
-{
-  Int i,j,k;
-  Int isReflex;
-  /*if there are at most one vertex in the queue, then simply insert
-   */
-  if(index_queue <=1){
-    insert(v);
-    return;
-  }
-  
-  /*there are at least two vertices in the queue*/
-  j=index_queue-1;
-  
-  for(i=j; i>=1; i--) {
-    if(isIncreasing) {
-      isReflex = (area(queue[i-1], queue[i], v) <= 0.0);
-    }
-    else /*decreasing*/{
-      isReflex = (area(v, queue[i], queue[i-1]) <= 0.0);	  
-    }
-    if(isReflex) {
-      break;
-    }
-  }
-
-  /*
-   *if i<j then vertices: i+1--j are convex
-   * output triangle fan: 
-   *  v, and queue[i], i+1, ..., j
-   */
-  if(i<j) 
-    {
-      pStream->begin();
-      pStream->insert(v);
-      if(isIncreasing) {
-	for(k=i; k<=j; k++)
-	  pStream->insert(queue[k]);
-      }
-      else {
-	for(k=j; k>=i; k--)
-	  pStream->insert(queue[k]);
-      }
-      
-      pStream->end(PRIMITIVE_STREAM_FAN);
-    }
-
-  /*delete vertices i+1--j from the queue*/
-  index_queue = i+1;
-  /*finally insert v at the end of the queue*/
-  insert(v);
-
-}
-
-void reflexChain::print()
-{
-  Int i;
-  printf("reflex chain: isIncreasing=%i\n", isIncreasing);
-  for(i=0; i<index_queue; i++) {
-    printf("(%f,%f) ", queue[i][0], queue[i][1]);
-  }
-  printf("\n");
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h b/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h
deleted file mode 100644
index f78b8f402e3..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _MONO_TRIANGULATION_H
-#define _MONO_TRIANGULATION_H
-
-#include "definitions.h"
-#include "primitiveStream.h"
-#include "directedLine.h"
-#include "arc.h"
-
-class Backend;
-
-class reflexChain{
-  Real2 *queue; 
-  /*the order of the polygon vertices: either q[0],q[1].., or 
-   * q[n-1], q[n-2], ..., q[0]
-   *this order determines the interior of the polygon, so it
-   *also used to determines whether a chain is reflex or convex
-   */
-  Int isIncreasing; 
-  Int index_queue;
-  Int size_queue; /*allocated size*/
-  
-public:
-  reflexChain(Int size, Int isIncreasing);
-  ~reflexChain();
-  
-  void insert(Real u, Real v);
-  void insert(Real v[2]);
-  
-  void processNewVertex(Real v[2], primStream* pStream);
-  void outputFan(Real v[2], primStream* pStream);
-
-  void processNewVertex(Real v[2], Backend* backend);
-  void outputFan(Real v[2], Backend* backend);
-
-  void print();
-};
-
-/*dynamic array of pointers to reals.
- *Intended to store an array of (u,v).
- *Notice that it doesn't allocate or dealocate the space
- *for the (u,v) themselfs. So it assums that someone else 
- *is taking care of them, while this class only plays with
- *the pointers.
- */
-class vertexArray{
-  Real** array;
-  Int index;
-  Int size;
-public:
-  vertexArray(Int s);
-  vertexArray(Real vertices[][2], Int nVertices);
-  ~vertexArray();
-  void appendVertex(Real* ptr); /*the content (pointed by ptr is NOT copied*/
-  Real* getVertex(Int i) {return array[i];}
-  Real** getArray() {return array;}
-  Int getNumElements() {return index;}
-  Int findIndexAbove(Real v);
-  Int findIndexAboveGen(Real v, Int startIndex, Int EndIndex);
-  Int findIndexBelowGen(Real v, Int startIndex, Int EndIndex);
-  Int findIndexStrictBelowGen(Real v, Int startIndex, Int EndIndex);
-  Int findIndexFirstAboveEqualGen(Real v, Int startIndex, Int endIndex);
-  Int skipEqualityFromStart(Real v, Int start, Int end);
-  //return i such that fron [i+1, end] is strictly U-monotone (left to right
-  Int findDecreaseChainFromEnd(Int begin, Int end);
-  void print();
-};
-
-void monoTriangulation(directedLine* monoPolygon, primStream* pStream);
-
-void monoTriangulationRec(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			  primStream* pStream);
-
-void monoTriangulationRec(directedLine* inc_chain, Int inc_index, 
-			  directedLine* dec_chain, Int dec_index, 
-			  directedLine* topVertex, Int top_index,
-			  directedLine* botVertex,
-			  primStream* pStream);
-
-/*the chain could be increasing or decreasing, although we use the
- * name inc_chain.
- *the argument  is_increase_chain indicates whether this chain
- *is increasing (left chain in V-monotone case) or decreaing (right chain
- *in V-monotone case).
- */
-void monoTriangulation2(Real* topVertex, Real* botVertex, 
-			vertexArray* inc_chain, Int inc_smallIndex,
-			Int inc_largeIndex,
-			Int is_increase_chain,
-			primStream* pStream);
-void monoTriangulationRecGen(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current, Int inc_end,
-			  vertexArray* dec_chain, Int dec_current, Int dec_end,
-			  primStream* pStream); 
-
-void monoTriangulationRecGenOpt(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current, Int inc_end,
-			  vertexArray* dec_chain, Int dec_current, Int dec_end,
-			  primStream* pStream); 
-
-void triangulateXYMonoTB(Int n_left, Real** leftVerts,
-		       Int n_right, Real** rightVerts,
-		       primStream* pStream);
-
-void monoTriangulationRecGenTBOpt(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current, Int inc_end,
-			  vertexArray* dec_chain, Int dec_current, Int dec_end,
-			  primStream* pStream);
-
-void monoTriangulationRecOpt(Real* topVertex, Real* botVertex, 
-			     vertexArray* left_chain, Int left_current,
-			     vertexArray* right_chain, Int right_current,
-			     primStream* pStream);
-
-void monoTriangulationRecFunGen(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current, Int inc_end,
-			  vertexArray* dec_chain, Int dec_current, Int dec_end,
-			  Int  (*compFun)(Real*, Real*),
-			  primStream* pStream);
-
-void monoTriangulationRecFun(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			   Int (*compFun)(Real*, Real*),
-			  primStream* pStream);
-void monoTriangulationFun(directedLine* monoPolygon, 
-			  Int (*compFun)(Real*, Real*), primStream* pStream);
-
-
-
-
-void monoTriangulationRec(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			  Backend* backend);
-
-void monoTriangulationFunBackend(Arc_ptr loop, Int (*compFun)(Real*, Real*), Backend* backend);
-
-void monoTriangulationRecFunBackend(Real* topVertex, Real* botVertex, 
-			  vertexArray* inc_chain, Int inc_current,
-			  vertexArray* dec_chain, Int dec_current,
-			  Int  (*compFun)(Real*, Real*),
-			  Backend* backend);
-
-void monoTriangulationOpt(directedLine* poly, primStream* pStream);
-
-#endif
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/mystdio.h b/src/glu/sgi/libnurbs/nurbtess/mystdio.h
deleted file mode 100644
index a394e0ff95d..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/mystdio.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mystdio.h
- *
- */
-
-#ifndef __glumystdio_h_
-#define __glumystdio_h_
-
-#ifdef STANDALONE
-inline void _glu_dprintf( char *, ... ) { }
-#endif
-
-#ifdef LIBRARYBUILD
-#ifndef NDEBUG
-#include <stdio.h>
-#define _glu_dprintf printf
-#else
-inline void _glu_dprintf( char *, ... ) { }
-#endif
-#endif
-
-#ifdef GLBUILD
-inline void _glu_dprintf( char *, ... ) { }
-#endif
-
-#ifndef NULL
-#define NULL		0
-#endif
-
-#endif /* __glumystdio_h_ */
diff --git a/src/glu/sgi/libnurbs/nurbtess/mystdlib.h b/src/glu/sgi/libnurbs/nurbtess/mystdlib.h
deleted file mode 100644
index ab7a3b273a3..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/mystdlib.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-
-/*
- * mystdlib.h
- *
- */
-
-#ifndef __glumystdlib_h_
-#define __glumystdlib_h_
-
-#ifdef STANDALONE
-typedef unsigned int size_t;
-extern "C" void 	abort( void );
-extern "C" void *	malloc( size_t );
-extern "C" void 	free( void * );
-#endif
-
-#ifdef LIBRARYBUILD
-#include <stdlib.h>
-#endif
-
-#ifdef GLBUILD
-typedef unsigned int size_t;
-extern "C" void 	abort( void );
-extern "C" void *	malloc( size_t );
-extern "C" void 	free( void * );
-#endif
-
-#endif /* __glumystdlib_h_ */
diff --git a/src/glu/sgi/libnurbs/nurbtess/partitionX.cc b/src/glu/sgi/libnurbs/nurbtess/partitionX.cc
deleted file mode 100644
index e25e30b0f39..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/partitionX.cc
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-
-#include "partitionX.h"
-
-#define CONCAVITY_ZERO 1.0e-6 //this number is used to test whether a vertex is concave (refelx) 
-                              //or not. The test needs to compute the area of the three adjacent 
-                              //vertices to see if the are is positive or negative. 
-
-Int isCuspX(directedLine *v)
-{
-  //if v->prev <= v && v->next <= v
-  //|| v->prev >= v && v->next >= v
-  Real* T = v->head();
-  Real* P = v->getPrev()->head();
-  Real* N = v->getNext()->head();
-  if(
-     (compV2InX(T,P) != -1 && 
-      compV2InX(T,N) != -1
-      ) ||
-     (compV2InX(T,P) != 1 && 
-      compV2InX(T,N) != 1
-      )
-     )
-    return 1;
-  else
-    return 0;
-}
-
-Int isReflexX(directedLine* v)
-{
-  Real* A = v->getPrev()->head();
-  Real* B = v->head();
-  Real* C = v->tail();
-  Real Bx,By, Cx, Cy;
-  //scale them in case they are too small
-  Bx = 10*(B[0] - A[0]);
-  By = 10*(B[1] - A[1]);
-  Cx = 10*(C[0] - A[0]);
-  Cy = 10*(C[1] - A[1]);
-
-  if(Bx*Cy - Cx*By < -CONCAVITY_ZERO) return 1;
-  else return 0;
-}
-
-
-/*return 
- *0: not-cusp
- *1: interior cusp
- *2: exterior cusp
- */
-Int cuspTypeX(directedLine *v)
-{
-  if(! isCuspX(v)) return 0;
-  else 
-    {
-//printf("isCusp,%f,%f\n", v->head()[0], v->head()[1]);
-      if(isReflexX(v)) 
-	{
-//	  printf("isReflex\n");
-	  return 1;
-	}
-      else
-	{
-//	  printf("not isReflex\n");
-	  return 2;
-	}
-    }
-}
-
-Int numInteriorCuspsX(directedLine *polygon)
-{
-  directedLine *temp;
-  int ret = 0;
-  if(cuspTypeX(polygon) == 1)
-    ret++;
-  for(temp = polygon->getNext(); temp != polygon; temp = temp->getNext())
-    if(cuspTypeX(temp) == 1)
-      ret++;
-  return ret;
-}
-  
-
-void findInteriorCuspsX(directedLine *polygon, Int& ret_n_interior_cusps,
-			directedLine** ret_interior_cusps)
-{
-  directedLine *temp;
-  ret_n_interior_cusps = 0;
-  if(cuspTypeX(polygon) == 1)
-    {
-      ret_interior_cusps[ret_n_interior_cusps++] = polygon;
-    }
-  for(temp = polygon->getNext(); temp != polygon; temp = temp->getNext())    
-    if(cuspTypeX(temp) == 1)
-      {
-	ret_interior_cusps[ret_n_interior_cusps++] = temp;    
-      }
-}
-
-directedLine* findDiagonal_singleCuspX(directedLine* cusp)
-{
-  directedLine* temp;
-  Int is_minimal = ((compV2InX(cusp->head(), cusp->tail()) == -1)? 1:0);
-
-  if(is_minimal)
-    for(temp = cusp->getNext(); temp != cusp; temp = temp->getNext())
-      {
-	if(compV2InX(cusp->head(), temp->head()) == 1)
-	  {	   
-	    return temp;
-	  }
-      }
-  else //is maxmal 
-    for(temp = cusp->getNext(); temp != cusp; temp = temp->getNext())
-      {
-	if(compV2InX(cusp->head(), temp->head()) == -1)
-	  {	   
-	    return temp;
-	  }
-      }
-  return NULL;
-}
-      
-
-     
diff --git a/src/glu/sgi/libnurbs/nurbtess/partitionX.h b/src/glu/sgi/libnurbs/nurbtess/partitionX.h
deleted file mode 100644
index 69f2b2df212..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/partitionX.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _PARTITIONX_H
-#define _PARTITIONX_H
-
-#include "directedLine.h"
-
-Int isCuspX(directedLine *v);
-Int isReflexX(directedLine *v);
-Int cuspTypeX(directedLine *v);
-
-//assuming the array of ret_interior_cusps has been allocated
-void findInteriorCuspsX(directedLine* polygon, Int& ret_n_interior_cusps,
-		       directedLine** ret_interior_cusps);
-
-Int numInteriorCuspsX(directedLine* polygon);
-
-/*a single polygon with a single cusp
- *return the diagonal vertex corresponding to this cusp
- */
-directedLine* findDiagonal_singleCuspX(directedLine* cusp);
-
-#endif
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/partitionY.cc b/src/glu/sgi/libnurbs/nurbtess/partitionY.cc
deleted file mode 100644
index e097461ac5e..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/partitionY.cc
+++ /dev/null
@@ -1,836 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <time.h>
-
-#include "zlassert.h"
-#include "partitionY.h"
-#include "searchTree.h"
-#include "quicksort.h"
-#include "polyUtil.h"
-
-
-#define max(a,b) ((a>b)? a:b)
-#define min(a,b) ((a>b)? b:a)
-
-
-/*retrurn 
- *-1: if A < B (Ya<Yb) || (Ya==Yb)
- * 0: if A == B
- * 1: if A>B
- */
-static Int compVertInY(Real A[2], Real B[2])
-{
-  if( (A[1] < B[1]) || (A[1]==B[1] && A[0]<B[0])) 
-    return -1;
-  else if
-    ( A[1] == B[1] && A[0] == B[0]) return 0;
-  else
-    return 1;
-}
-
-/*v is a vertex: the head of en edge,
- *e is an edge,
- *return 1 if e is below v: assume v1 and v2 are the two endpoints of e:
- * v1<= v, v2<=v.
- */
-Int isBelow(directedLine *v, directedLine *e)
-{
-  Real* vert = v->head();
-  if(   compVertInY(e->head(), vert) != 1 
-     && compVertInY(e->tail(), vert) != 1
-     )
-    return 1;
-  else
-    return 0;
-}
-
-/*v is a vertex: the head of en edge,
- *e is an edge,
- *return 1 if e is below v: assume v1 and v2 are the two endpoints of e:
- * v1>= v, v2>=v.
- */
-Int isAbove(directedLine *v, directedLine *e)
-{
-  Real* vert = v->head();
-  if(   compVertInY(e->head(), vert) != -1 
-     && compVertInY(e->tail(), vert) != -1
-     )
-    return 1;
-  else
-    return 0;
-}
-
-Int isCusp(directedLine *v)
-{
-  Real *A=v->getPrev()->head();
-  Real *B=v->head();
-  Real *C=v->tail();
-  if(A[1] < B[1] && B[1] < C[1])
-    return 0;
-  else if(A[1] > B[1] && B[1] > C[1])
-    return 0;
-  else if(A[1] < B[1] && C[1] < B[1])
-    return 1;
-  else if(A[1] > B[1] && C[1] > B[1])
-    return 1;
-
-  if((isAbove(v, v) && isAbove(v, v->getPrev())) ||
-     (isBelow(v, v) && isBelow(v, v->getPrev())))
-    return 1;
-  else
-    return 0;
-}
-
-/*crossproduct is strictly less than 0*/
-Int isReflex(directedLine *v)
-{
-  Real* A = v->getPrev()->head();
-  Real* B = v->head();
-  Real* C = v->tail();
-  Real Bx,By, Cx, Cy;
-  Bx = B[0] - A[0];
-  By = B[1] - A[1];
-  Cx = C[0] - A[0];
-  Cy = C[1] - A[1];
-
-  if(Bx*Cy - Cx*By < 0) return 1;
-  else return 0;
-}
-
- /*return 
- *0: not-cusp
- *1: interior cusp
- *2: exterior cusp
- */
-Int cuspType(directedLine *v)
-{
-  if(! isCusp(v)) return 0;
-  else if(isReflex(v)) return 1;
-  else
-    return 2;
-}
-
-sweepRange* sweepRangeMake(directedLine* left, Int leftType,
-			   directedLine* right, Int rightType)
-{
-  sweepRange* ret = (sweepRange*)malloc(sizeof(sweepRange));
-  assert(ret);
-  ret->left = left;
-  ret->leftType = leftType;
-  ret->right = right;
-  ret->rightType = rightType;
-  return ret;
-}
-
-void sweepRangeDelete(sweepRange* range)
-{
-  free(range);
-}
-
-Int sweepRangeEqual(sweepRange* src1, sweepRange* src2)
-{
-  Int leftEqual;
-  Int rightEqual;
-  
-  
-  /*The case when both are vertices should not happen*/
-  assert(! (src1->leftType == 0 && src2->leftType == 0));    
-  if(src1->leftType == 0 && src2->leftType == 1){
-    if(src1->left == src2->left ||
-       src1->left->getPrev() == src2->left
-       )
-      leftEqual = 1;
-    else
-      leftEqual = 0;
-  }
-  else if(src1->leftType == 1 && src2->leftType == 1){
-    if(src1->left == src2->left)
-      leftEqual = 1;
-    else
-      leftEqual = 0;
-  }
-  else /*src1->leftType == 1 && src2->leftType == 0*/{
-    if(src1->left == src2->left ||
-       src1->left == src2->left->getPrev()
-       )
-      leftEqual = 1;
-    else 
-      leftEqual = 0;
-  }
-
-  /*the same thing for right*/
-  /*The case when both are vertices should not happen*/
-  assert(! (src1->rightType == 0 && src2->rightType == 0));    
-  if(src1->rightType == 0 && src2->rightType == 1){
-    if(src1->right == src2->right ||
-       src1->right->getPrev() == src2->right
-       )
-      rightEqual = 1;
-    else
-      rightEqual = 0;
-  }
-  else if(src1->rightType == 1 && src2->rightType == 1){
-    if(src1->right == src2->right)
-      rightEqual = 1;
-    else
-      rightEqual = 0;
-  }
-  else /*src1->rightType == 1 && src2->rightType == 0*/{
-    if(src1->right == src2->right ||
-       src1->right == src2->right->getPrev()
-       )
-      rightEqual = 1;
-    else 
-      rightEqual = 0;
-  }
-  
-  return (leftEqual == 1 || rightEqual == 1);
-}
-
-/*given (x_1, y_1) and (x_2, y_2), and y
- *return x such that (x,y) is on the line
- */
-inline/*static*/ Real intersectHoriz(Real x1, Real y1, Real x2, Real y2, Real y)
-{
-  return ((y2==y1)? (x1+x2)*Real(0.5) : x1 + ((y-y1)/(y2-y1)) * (x2-x1));
-/*
-  if(y2 == y1) return (x1+x2)*0.5;
-  else return x1 + ((y-y1)/(y2-y1)) * (x2-x1);
-*/
-}
-
-/*compare two edges of a polygon.
- *edge A < edge B if there is a horizontal line so that the intersection
- *with A is to the left of the intersection with B.
- *This function is used in sweepY for the dynamic search tree insertion to
- *order the edges.
- * Implementation: (x_1,y_1) and (x_2, y_2)
- */
-static Int compEdges(directedLine *e1, directedLine *e2)
-{
-  Real* head1 = e1->head();
-  Real* tail1 = e1->tail();
-  Real* head2 = e2->head();
-  Real* tail2 = e2->tail();
-/*
-  Real h10 = head1[0];
-  Real h11 = head1[1];
-  Real t10 = tail1[0];
-  Real t11 = tail1[1];
-  Real h20 = head2[0];
-  Real h21 = head2[1];
-  Real t20 = tail2[0];
-  Real t21 = tail2[1];
-*/
-  Real e1_Ymax, e1_Ymin, e2_Ymax, e2_Ymin;
-/*
-  if(h11>t11) {
-    e1_Ymax= h11;
-    e1_Ymin= t11;
-  }
-  else{
-    e1_Ymax = t11;
-    e1_Ymin = h11;
-  }
-
-  if(h21>t21) {
-    e2_Ymax= h21;
-    e2_Ymin= t21;
-  }
-  else{
-    e2_Ymax = t21;
-    e2_Ymin = h21;
-  }
-*/
- 
-  if(head1[1]>tail1[1]) {
-    e1_Ymax= head1[1];
-    e1_Ymin= tail1[1];
-  }
-  else{
-    e1_Ymax = tail1[1];
-    e1_Ymin = head1[1];
-  }
-
-  if(head2[1]>tail2[1]) {
-    e2_Ymax= head2[1];
-    e2_Ymin= tail2[1];
-  }
-  else{
-    e2_Ymax = tail2[1];
-    e2_Ymin = head2[1];
-  }
-
-  
-  /*Real e1_Ymax = max(head1[1], tail1[1]);*/ /*max(e1->head()[1], e1->tail()[1]);*/
-  /*Real e1_Ymin = min(head1[1], tail1[1]);*/ /*min(e1->head()[1], e1->tail()[1]);*/
-  /*Real e2_Ymax = max(head2[1], tail2[1]);*/ /*max(e2->head()[1], e2->tail()[1]);*/
-  /*Real e2_Ymin = min(head2[1], tail2[1]);*/ /*min(e2->head()[1], e2->tail()[1]);*/
-
-  Real Ymax = min(e1_Ymax, e2_Ymax);
-  Real Ymin = max(e1_Ymin, e2_Ymin);
-    
-  Real y = Real(0.5)*(Ymax + Ymin);
-
-/*  Real x1 = intersectHoriz(e1->head()[0], e1->head()[1], e1->tail()[0], e1->tail()[1], y);
-  Real x2 = intersectHoriz(e2->head()[0], e2->head()[1], e2->tail()[0], e2->tail()[1], y);
-*/
-/*
-  Real x1 = intersectHoriz(h10, h11, t10, t11, y);
-  Real x2 = intersectHoriz(h20, h21, t20, t21, y);
-*/
-  Real x1 = intersectHoriz(head1[0], head1[1], tail1[0], tail1[1], y);
-  Real x2 = intersectHoriz(head2[0], head2[1], tail2[0], tail2[1], y);
-
-  if(x1<= x2) return -1;
-  else return 1;
-}
-  
-/*used by sort precedures
- */
-static Int compInY(directedLine* v1, directedLine* v2)
-{
-  return v1->compInY(v2);
-}
-
-void findDiagonals(Int total_num_edges, directedLine** sortedVertices, sweepRange** ranges, Int& num_diagonals, directedLine** diagonal_vertices)
-{
-  Int i,j,k;
-
-  k=0;
-
-  for(i=0; i<total_num_edges; i++)
-    {
-      directedLine* vert =sortedVertices[i];
-      directedLine* thisEdge = vert;
-      directedLine* prevEdge = vert->getPrev();
-/*
-printf("find i=%i\n", i);            
-printf("the vertex is\n");
-vert->printSingle();
-*/
-      if(isBelow(vert, thisEdge) && isBelow(vert, prevEdge) && compEdges(prevEdge, thisEdge)<0)
-	{
-	  /*this is an upward interior cusp*/
-	  diagonal_vertices[k++] = vert;
-
-	  for(j=i+1; j<total_num_edges; j++)
-	    if(sweepRangeEqual(ranges[i], ranges[j]))
-	      {
-		diagonal_vertices[k++] = sortedVertices[j];
-		break;
-	      }
-	  assert(j<total_num_edges);
-
-
-	}
-      else if(isAbove(vert, thisEdge) && isAbove(vert, prevEdge) && compEdges(prevEdge, thisEdge)>0)
-	{
-	  /*this is an downward interior cusp*/
-	  diagonal_vertices[k++] = vert;
-	  for(j=i-1; j>=0; j--)
-	    if(sweepRangeEqual(ranges[i], ranges[j]))
-	      {
-		diagonal_vertices[k++] = sortedVertices[j];
-		break;
-	      }
-/*	  printf("j=%i\n", j);*/
-	  assert(j>=0);
-
-
-
-	}
-    }
-  num_diagonals = k/2;
-}
-
-/*get rid of repeated diagonlas so that each diagonal appears only once in the array
- */
-Int deleteRepeatDiagonals(Int num_diagonals, directedLine** diagonal_vertices, directedLine** new_vertices)
-{
-  Int i,k;
-  Int j,l;
-  Int index;
-  index=0;
-  for(i=0,k=0; i<num_diagonals; i++, k+=2)
-    {
-      Int isRepeated=0;
-      /*check the diagonla (diagonal_vertice[k], diagonal_vertices[k+1])
-       *is repeated or not
-       */
-      for(j=0,l=0; j<index; j++, l+=2)
-	{
-	  if(
-	     (diagonal_vertices[k] == new_vertices[l] && 
-	      diagonal_vertices[k+1] == new_vertices[l+1]
-	      )
-	     ||
-	     (
-	      diagonal_vertices[k] == new_vertices[l+1] && 
-	      diagonal_vertices[k+1] == new_vertices[l]
-	      )
-	     )
-	    {
-	      isRepeated=1;
-	      break;
-	    }
-	}
-      if(! isRepeated)
-	{
-	  new_vertices[index+index] = diagonal_vertices[k];
-	  new_vertices[index+index+1] = diagonal_vertices[k+1];	  
-	  index++;
-	}
-    }
-  return index;
-}
-
-/*for debug only*/	  
-directedLine** DBGfindDiagonals(directedLine *polygons, Int& num_diagonals)
-{
-  Int total_num_edges = 0;
-  directedLine** array = polygons->toArrayAllPolygons(total_num_edges);
-  quicksort( (void**)array, 0, total_num_edges-1, (Int (*)(void*, void*)) compInY);
-  sweepRange** ranges = (sweepRange**) malloc(sizeof(sweepRange*) * total_num_edges);
-  assert(ranges);
-
-  sweepY(total_num_edges, array, ranges);
-
- directedLine** diagonal_vertices = (directedLine**) malloc(sizeof(directedLine*) * total_num_edges);
-  assert(diagonal_vertices);
-  findDiagonals(total_num_edges, array, ranges, num_diagonals, diagonal_vertices);
-
-  num_diagonals=deleteRepeatDiagonals(num_diagonals, diagonal_vertices, diagonal_vertices);
-  return diagonal_vertices;
-
-}
-
-
-/*partition into Y-monotone polygons*/
-directedLine* partitionY(directedLine *polygons, sampledLine **retSampledLines)
-{
-  Int total_num_edges = 0;
-  directedLine** array = polygons->toArrayAllPolygons(total_num_edges);
-
-  quicksort( (void**)array, 0, total_num_edges-1, (Int (*)(void*, void*)) compInY);
-
-  sweepRange** ranges = (sweepRange**) malloc(sizeof(sweepRange*) * (total_num_edges));
-  assert(ranges);
-
-
-
-  sweepY(total_num_edges, array, ranges);
-
-
-
-  /*the diagonal vertices are stored as:
-   *v0-v1: 1st diagonal
-   *v2-v3: 2nd diagonal
-   *v5-v5: 3rd diagonal
-   *...
-   */
-
-
-  Int num_diagonals;
-  /*number diagonals is < total_num_edges*total_num_edges*/
-  directedLine** diagonal_vertices = (directedLine**) malloc(sizeof(directedLine*) * total_num_edges*2/*total_num_edges*/);
-  assert(diagonal_vertices);
-
-
-
-  findDiagonals(total_num_edges, array, ranges, num_diagonals, diagonal_vertices);
-
-
-
-  directedLine* ret_polygons = polygons;
-  sampledLine* newSampledLines = NULL;
-  Int i,k;
-
-num_diagonals=deleteRepeatDiagonals(num_diagonals, diagonal_vertices, diagonal_vertices);
-
-
-
-  Int *removedDiagonals=(Int*)malloc(sizeof(Int) * num_diagonals);
-  for(i=0; i<num_diagonals; i++)
-    removedDiagonals[i] = 0;
-
-
-
-
-
-  for(i=0,k=0; i<num_diagonals; i++,k+=2)
-    {
-
-
-      directedLine* v1=diagonal_vertices[k];
-      directedLine* v2=diagonal_vertices[k+1];
-      directedLine* ret_p1;
-      directedLine* ret_p2;
-      
-      /*we ahve to determine whether v1 and v2 belong to the same polygon before
-       *their structure are modified by connectDiagonal().
-       */
-/*
-      directedLine *root1 = v1->findRoot();
-      directedLine *root2 = v2->findRoot();
-      assert(root1);      
-      assert(root2);
-*/
-
-directedLine*  root1 = v1->rootLinkFindRoot();
-directedLine*  root2 = v2->rootLinkFindRoot();
-
-      if(root1 != root2)
-	{
-
-	  removedDiagonals[i] = 1;
-	  sampledLine* generatedLine;
-
-
-
-	  v1->connectDiagonal(v1,v2, &ret_p1, &ret_p2, &generatedLine, ret_polygons);
-
-
-
-	  newSampledLines = generatedLine->insert(newSampledLines);
-/*
-	  ret_polygons = ret_polygons->cutoffPolygon(root1);
-
-	  ret_polygons = ret_polygons->cutoffPolygon(root2);
-	  ret_polygons = ret_p1->insertPolygon(ret_polygons);
-root1->rootLinkSet(ret_p1);
-root2->rootLinkSet(ret_p1);
-ret_p1->rootLinkSet(NULL);
-ret_p2->rootLinkSet(ret_p1);
-*/
-	  ret_polygons = ret_polygons->cutoffPolygon(root2);
-
-
-
-root2->rootLinkSet(root1);
-ret_p1->rootLinkSet(root1);
-ret_p2->rootLinkSet(root1);
-
-       /*now that we have connected the diagonal v1 and v2, 
-        *we have to check those unprocessed diagonals which 
-        *have v1 or v2 as an end point. Notice that the head of v1
-        *has the same coodinates as the head of v2->prev, and the head of
-        *v2 has the same coordinate as the head of v1->prev. 
-        *Suppose these is a diagonal (v1, x). If (v1,x) is still a valid
-        *diagonal, then x should be on the left hand side of the directed line:        *v1->prev->head -- v1->head -- v1->tail. Otherwise, (v1,x) should be  
-        *replaced by (v2->prev, x), that is, x is on the left of 
-        * v2->prev->prev->head, v2->prev->head, v2->prev->tail.
-        */
-        Int ii, kk;
-        for(ii=0, kk=0; ii<num_diagonals; ii++, kk+=2)
-	  if( removedDiagonals[ii]==0)
-	    {
-	      directedLine* d1=diagonal_vertices[kk];
-	      directedLine* d2=diagonal_vertices[kk+1];
-	      /*check d1, and replace diagonal_vertices[kk] if necessary*/
-	      if(d1 == v1) {
-		/*check if d2 is to left of v1->prev->head:v1->head:v1->tail*/
-		if(! pointLeft2Lines(v1->getPrev()->head(), 
-				     v1->head(), v1->tail(), d2->head()))
-		  {
-/*
-		    assert(pointLeft2Lines(v2->getPrev()->getPrev()->head(),
-					   v2->getPrev()->head(), 
-					   v2->getPrev()->tail(), d2->head()));
-*/
-		    diagonal_vertices[kk] = v2->getPrev();
-		  }
-	      }
-	      if(d1 == v2) {
-		/*check if d2 is to left of v2->prev->head:v2->head:v2->tail*/
-		if(! pointLeft2Lines(v2->getPrev()->head(),
-				     v2->head(), v2->tail(), d2->head()))
-		  {
-/*
-		    assert(pointLeft2Lines(v1->getPrev()->getPrev()->head(),
-					   v1->getPrev()->head(),
-					   v1->getPrev()->tail(), d2->head()));
-*/
-		    diagonal_vertices[kk] = v1->getPrev();
-		  }
-	      }
-	      /*check d2 and replace diagonal_vertices[k+1] if necessary*/
-	      if(d2 == v1) {
-		/*check if d1 is to left of v1->prev->head:v1->head:v1->tail*/
-		if(! pointLeft2Lines(v1->getPrev()->head(), 
-				     v1->head(), v1->tail(), d1->head()))
-		  {
-/*		    assert(pointLeft2Lines(v2->getPrev()->getPrev()->head(),
-					   v2->getPrev()->head(), 
-					   v2->getPrev()->tail(), d1->head()));
-*/
-		    diagonal_vertices[kk+1] = v2->getPrev();
-		  }
-	      }
-	      if(d2 == v2) {
-		/*check if d1 is to left of v2->prev->head:v2->head:v2->tail*/
-		if(! pointLeft2Lines(v2->getPrev()->head(),
-				     v2->head(), v2->tail(), d1->head()))
-		  {
-/*		    assert(pointLeft2Lines(v1->getPrev()->getPrev()->head(),
-					   v1->getPrev()->head(),
-					   v1->getPrev()->tail(), d1->head()));
-*/
-		    diagonal_vertices[kk+1] = v1->getPrev();
-		  }
-	      }
-	    }					    	       
-}/*end if (root1 not equal to root 2)*/
-}
-
-  /*second pass,  now all diagoals should belong to the same polygon*/
-
-
-
-  for(i=0,k=0; i<num_diagonals; i++, k += 2)
-    if(removedDiagonals[i] == 0) 
-      {
-
-
-	directedLine* v1=diagonal_vertices[k];
-	directedLine* v2=diagonal_vertices[k+1];
-
-
-
-	directedLine* ret_p1;
-	directedLine* ret_p2;
-
-	/*we ahve to determine whether v1 and v2 belong to the same polygon before
-	 *their structure are modified by connectDiagonal().
-	 */
-	directedLine *root1 = v1->findRoot();
-/*
-	directedLine *root2 = v2->findRoot();
-
-
-
-	assert(root1);      
-	assert(root2);      
-	assert(root1 == root2);
-  */    
-	sampledLine* generatedLine;
-
-
-
-	v1->connectDiagonal(v1,v2, &ret_p1, &ret_p2, &generatedLine, ret_polygons);
-	newSampledLines = generatedLine->insert(newSampledLines);
-
-	ret_polygons = ret_polygons->cutoffPolygon(root1);
-
-	ret_polygons = ret_p1->insertPolygon(ret_polygons);
-
-	ret_polygons = ret_p2->insertPolygon(ret_polygons);
-
-
-
-	for(Int j=i+1; j<num_diagonals; j++) 
-	  {
-	    if(removedDiagonals[j] ==0)
-	      {
-
-		directedLine* temp1=diagonal_vertices[2*j];
-		directedLine* temp2=diagonal_vertices[2*j+1];
-               if(temp1==v1 || temp1==v2 || temp2==v1 || temp2==v2)
-		if(! temp1->samePolygon(temp1, temp2))
-		  {
-		    /*if temp1 and temp2 are in different polygons, 
-		     *then one of them must be v1 or v2.
-		     */
-
-
-
-		    assert(temp1==v1 || temp1 == v2 || temp2==v1 || temp2 ==v2);
-		    if(temp1==v1) 
-		      {
-			diagonal_vertices[2*j] = v2->getPrev();
-		      }
-		    if(temp2==v1)
-		      {
-			diagonal_vertices[2*j+1] = v2->getPrev();
-		      }
-		    if(temp1==v2)
-		      {
-			diagonal_vertices[2*j] = v1->getPrev();		      
-		      }
-		    if(temp2==v2)
-		      {
-			diagonal_vertices[2*j+1] = v1->getPrev();
-		      }
-		  }
-	      }
-	  }      
-
-      }
-
-  /*clean up spaces*/
-  free(array);
-  free(ranges);
-  free(diagonal_vertices);
-  free(removedDiagonals);
-
-  *retSampledLines = newSampledLines;
-  return ret_polygons;
-}
-	
-/*given a set of simple polygons where the interior 
- *is decided by left-hand principle,
- *return a range (sight) for each vertex. This is called
- *Trapezoidalization.
- */ 
-void sweepY(Int nVertices, directedLine** sortedVertices, sweepRange** ret_ranges)
-{
-  Int i;
-  /*for each vertex in the sorted list, update the binary search tree.
-   *and store the range information for each vertex.
-   */
-  treeNode* searchTree = NULL;
-  for(i=0; i<nVertices;i++)
-    {
-
-      directedLine* vert = sortedVertices[i];
-
-      directedLine* thisEdge = vert;
-      directedLine* prevEdge = vert->getPrev();
-      
-      if(isBelow(vert, thisEdge) && isAbove(vert, prevEdge))
-	{
-
-	  /*case 1: this < v < prev
-	   *the polygon is going down at v, the interior is to 
-	   *the right hand side.
-	   * find the edge to the right of thisEdge for right range.
-           * delete thisEdge
-           * insert prevEdge
-	   */
-	  treeNode* thisNode = TreeNodeFind(searchTree, thisEdge, ( Int (*) (void *, void *))compEdges);
-	  assert(thisNode);
-
-	  treeNode* succ = TreeNodeSuccessor(thisNode);
-	  assert(succ);
-	  searchTree = TreeNodeDeleteSingleNode(searchTree, thisNode);
-	  searchTree = TreeNodeInsert(searchTree, TreeNodeMake(prevEdge), ( Int (*) (void *, void *))compEdges);
-
-
-	  ret_ranges[i] = sweepRangeMake(vert, 0, (directedLine*) (succ->key), 1);
-
-	}
-      else if(isAbove(vert, thisEdge) && isBelow(vert, prevEdge))
-	{
-
-	  /*case 2: this > v > prev
-	   *the polygon is going up at v, the interior is to 
-	   *the left hand side.
-	   * find the edge to the left of thisEdge for left range.
-           * delete prevEdge
-           * insert thisEdge
-	   */	  
-	  treeNode* prevNode = TreeNodeFind(searchTree, prevEdge, ( Int (*) (void *, void *))compEdges);
-	  assert(prevNode);
-	  treeNode* pred = TreeNodePredecessor(prevNode);
-	  searchTree = TreeNodeDeleteSingleNode(searchTree, prevNode);
-	  searchTree = TreeNodeInsert(searchTree, TreeNodeMake(thisEdge), ( Int (*) (void *, void *))compEdges);
-	  ret_ranges[i] = sweepRangeMake((directedLine*)(pred->key), 1, vert, 0);
-	}
-      else if(isAbove(vert, thisEdge) && isAbove(vert, prevEdge))
-	{
-
-	  /*case 3: insert both edges*/
-	  treeNode* thisNode = TreeNodeMake(thisEdge);
-	  treeNode* prevNode = TreeNodeMake(prevEdge);	  
-	  searchTree = TreeNodeInsert(searchTree, thisNode, ( Int (*) (void *, void *))compEdges);
-	  searchTree = TreeNodeInsert(searchTree, prevNode, ( Int (*) (void *, void *))compEdges);	  
-	  if(compEdges(thisEdge, prevEdge)<0)  /*interior cusp*/
-	    {
-
-	      treeNode* leftEdge = TreeNodePredecessor(thisNode);
-	      treeNode* rightEdge = TreeNodeSuccessor(prevNode);
-	      ret_ranges[i] = sweepRangeMake( (directedLine*) leftEdge->key, 1, 
-					     (directedLine*) rightEdge->key, 1
-					     );
-	    }
-	  else /*exterior cusp*/
-	    {
-
-	      ret_ranges[i] = sweepRangeMake( prevEdge, 1, thisEdge, 1);
-	    }
-	}
-      else if(isBelow(vert, thisEdge) && isBelow(vert, prevEdge))
-	{
-
-	  /*case 4: delete both edges*/
-	  treeNode* thisNode = TreeNodeFind(searchTree, thisEdge, ( Int (*) (void *, void *))compEdges);
-	  treeNode* prevNode = TreeNodeFind(searchTree, prevEdge, ( Int (*) (void *, void *))compEdges);
-	  if(compEdges(thisEdge, prevEdge)>0) /*interior cusp*/
-	    {
-	      treeNode* leftEdge = TreeNodePredecessor(prevNode);
-	      treeNode* rightEdge = TreeNodeSuccessor(thisNode);
-	      ret_ranges[i] = sweepRangeMake( (directedLine*) leftEdge->key, 1, 
-					     (directedLine*) rightEdge->key, 1
-					     );
-	    }
-	  else /*exterior cusp*/
-	    {
-	      ret_ranges[i] = sweepRangeMake( thisEdge, 1, prevEdge, 1);
-	    }
-	  searchTree = TreeNodeDeleteSingleNode(searchTree, thisNode);
-	  searchTree = TreeNodeDeleteSingleNode(searchTree, prevNode);
-	}
-      else
-	{
-	  fprintf(stderr,"error in partitionY.C, invalid case\n");
-	  printf("vert is\n");
-	  vert->printSingle();
-	  printf("thisEdge is\n");
-	  thisEdge->printSingle();
-	  printf("prevEdge is\n");
-	  prevEdge->printSingle();
-	  
-	  exit(1);
-	}
-    }
-
-  /*finaly clean up space: delete the search tree*/
-  TreeNodeDeleteWholeTree(searchTree);
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/partitionY.h b/src/glu/sgi/libnurbs/nurbtess/partitionY.h
deleted file mode 100644
index 5570c183d79..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/partitionY.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
- *partitionY.h:
- *partition a polygon into a Y-monotone polygon:
- * A polygon is Y-monotone if the boundary can be split into two polygon chains
- *A and B such that each chain is Y-monotonic that is the intersection of any
- *horizontal line intersects each chain has at most one connected componenets
- * (empty, single point or a single line).
- * 
- * A vertex is a cusp if both its ajacent vertices are either at or above v, 
- *or both at or below v. In addition, at least one of the ajacent verteces is
- *strictly below or above v. 
- * A vertex is a relex vertex if the internals angle is strictly greater than 
- *180. In other words, if the signed area is negative:
- *(x1, y1), (x2, y2), (x3, y3) are the three vertices along a polygon, the 
- *order is such that left hand side is inside the polygon. Then (x2,y2) is
- *reflex if: 
- *  (x2-x1, y2-y1) cross (x3-x1, y3-y1) <0.
- *A vertex is an interior cusp if it is a cusp and a reflex.
- *A vertex is an exterior cusp if it is a cusp but not a reflex.
- *
- */
-
-#ifndef _PARTITIONY_H
-#define _PARTITIONY_H
-
-#include "directedLine.h"
-
-/*whether an edge is below a vertex*/
-Int isBelow(directedLine *v, directedLine *e);
-
-/*whether an edge is above a vertex*/
-Int isAbove(directedLine *v, directedLine *e);
-
-/*not-cusp,
- *inerior cusp
- *exterior cusp
- */
-Int cuspType(directedLine *v);
-
-/*used in trapezoidalization*/
-typedef struct sweepRange{
-  directedLine *left;
-  Int leftType; /*either a vertex (leftType=0) or an edge (leftType =1) */
-  directedLine *right;
-  Int rightType; /*either a vertex (rightType=0) or an edge (rightType =1) */  
-} sweepRange;
-
-sweepRange* sweepRangeMake(directedLine* left, Int leftType,
-			   directedLine* right, Int rightType);
-
-void sweepRangeDelete(sweepRange* range);
-Int sweepRangeEqual(sweepRange* sr1, sweepRange* sr2);
-
-/*given a set of simple polygons where the interior 
- *is decided by left-hand principle,
- *return a range (sight) for each vertex. This is called
- *Trapezoidalization.
- */
-void sweepY(Int nVertices, directedLine **sortedVerteces, sweepRange** ret_ranges);
-
-
-directedLine* partitionY(directedLine *polygons, sampledLine **retSampledLines);
-
-void findDiagonals(Int total_num_edges, directedLine** sortedVertices, sweepRange** ranges, Int& num_diagonals, directedLine** diagonal_vertices);
-
-directedLine** DBGfindDiagonals(directedLine *polygons, Int& num_diagonals);
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/polyDBG.cc b/src/glu/sgi/libnurbs/nurbtess/polyDBG.cc
deleted file mode 100644
index 4d04df73f69..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/polyDBG.cc
+++ /dev/null
@@ -1,734 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-**
-** http://oss.sgi.com/projects/FreeB
-**
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-**
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-**
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <math.h>
-#include "zlassert.h"
-#include "polyDBG.h"
-
-#ifdef __WATCOMC__
-#pragma warning 14  10
-#pragma warning 391 10
-#pragma warning 726 10
-#endif
-
-static Real area(Real A[2], Real B[2], Real C[2])
-{
-  Real Bx, By, Cx, Cy;
-  Bx = B[0] - A[0];
-  By = B[1] - A[1];
-  Cx = C[0] - A[0];
-  Cy = C[1] - A[1];
-  return Bx*Cy - Cx*By;
-}
-
-Int DBG_isConvex(directedLine *poly)
-{
-  directedLine* temp;
-  if(area(poly->head(), poly->tail(), poly->getNext()->tail()) < 0.00000)
-    return 0;
-  for(temp = poly->getNext(); temp != poly; temp = temp->getNext())
-    {
-      if(area(temp->head(), temp->tail(), temp->getNext()->tail()) < 0.00000)
-	return 0;
-    }
-  return 1;
-}
-
-Int DBG_is_U_monotone(directedLine* poly)
-{
-  Int n_changes = 0;
-  Int prev_sign;
-  Int cur_sign;
-   directedLine* temp;
-  cur_sign = compV2InX(poly->tail(), poly->head());
-
-  n_changes = (compV2InX(poly->getPrev()->tail(), poly->getPrev()->head())
-	       != cur_sign);
-
-  for(temp = poly->getNext(); temp != poly; temp = temp->getNext())
-    {
-      prev_sign = cur_sign;
-      cur_sign = compV2InX(temp->tail(), temp->head());
-
-      if(cur_sign != prev_sign)
-	n_changes++;
-    }
-
-  if(n_changes ==2) return 1;
-  else return 0;
-}
-
-/*if u-monotone, and there is a long horizontal edge*/
-Int DBG_is_U_direction(directedLine* poly)
-{
-/*
-  if(! DBG_is_U_monotone(poly))
-    return 0;
-*/
-  Int V_count = 0;
-  Int U_count = 0;
-  directedLine* temp;
-  if( fabs(poly->head()[0] - poly->tail()[0]) <= fabs(poly->head()[1]-poly->tail()[1]))
-    V_count += poly->get_npoints();
-  else
-    U_count += poly->get_npoints();
-  /*
-  else if(poly->head()[1] == poly->tail()[1])
-    U_count += poly->get_npoints();
-    */
-  for(temp = poly->getNext(); temp != poly; temp = temp->getNext())
-    {
-      if( fabs(temp->head()[0] - temp->tail()[0]) <= fabs(temp->head()[1]-temp->tail()[1]))
-	V_count += temp->get_npoints();
-      else
-	U_count += temp->get_npoints();
-      /*
-      if(temp->head()[0] == temp->tail()[0])
-	V_count += temp->get_npoints();
-      else if(temp->head()[1] == temp->tail()[1])
-	U_count += temp->get_npoints();
-	*/
-    }
-
-  if(U_count > V_count) return 1;
-  else return 0;
-}
-
-/*given two line segments, determine whether
- *they intersect each other or not.
- *return 1 if they do,
- *return 0 otherwise
- */
-Int DBG_edgesIntersect(directedLine* l1, directedLine* l2)
-{
-  if(l1->getNext() == l2)
-    {
-      if(area(l1->head(), l1->tail(), l2->tail()) == 0) //colinear
-	{
-	  if( (l1->tail()[0] - l1->head()[0])*(l2->tail()[0]-l2->head()[0]) +
-	     (l1->tail()[1] - l1->head()[1])*(l2->tail()[1]-l2->head()[1]) >=0)
-	    return 0; //not intersect
-	  else
-	    return 1;
-	}
-      //else we use the normal code
-    }
-  else if(l1->getPrev() == l2)
-    {
-      if(area(l2->head(), l2->tail(), l1->tail()) == 0) //colinear
-	{
-	  if( (l2->tail()[0] - l2->head()[0])*(l1->tail()[0]-l1->head()[0]) +
-	     (l2->tail()[1] - l2->head()[1])*(l1->tail()[1]-l1->head()[1]) >=0)
-	    return 0; //not intersect
-	  else
-	    return 1;
-	}
-      //else we use the normal code
-    }
-  else //the two edges are not connected
-    {
-      if((l1->head()[0] == l2->head()[0] &&
-	 l1->head()[1] == l2->head()[1]) ||
-	 (l1->tail()[0] == l2->tail()[0] &&
-	 l1->tail()[1] == l2->tail()[1]))
-	return 1;
-
-    }
-
-
-  if(
-     (
-      area(l1->head(), l1->tail(), l2->head())
-      *
-      area(l1->head(), l1->tail(), l2->tail())
-      < 0
-      )
-     &&
-     (
-      area(l2->head(), l2->tail(), l1->head())
-      *area(l2->head(), l2->tail(), l1->tail())
-      < 0
-      )
-     )
-    return 1;
-  else
-    return 0;
-}
-
-/*whether AB and CD intersect
- *return 1 if they do
- *retur 0 otheriwse
- */
-Int DBG_edgesIntersectGen(Real A[2], Real B[2], Real C[2], Real D[2])
-{
-  if(
-     (
-      area(A, B, C) * area(A,B,D) <0
-      )
-     &&
-     (
-      area(C,D,A) * area(C,D,B) < 0
-      )
-     )
-    return 1;
-  else
-    return 0;
-}
-
-/*determien whether    (A,B) interesect chain[start] to [end]
- */
-Int DBG_intersectChain(vertexArray* chain, Int start, Int end, Real A[2], Real B[2])
-{
-  Int i;
-  for(i=start; i<=end-2; i++)
-    if(DBG_edgesIntersectGen(chain->getVertex(i), chain->getVertex(i+1), A, B))
-      return 1;
-
-  return 0;
-}
-
-/*determine whether a polygon intersect itself or not
- *return 1 is it does,
- *	 0 otherwise
- */
-Int DBG_polygonSelfIntersect(directedLine* poly)
-{
-  directedLine* temp1;
-  directedLine* temp2;
-  temp1=poly;
-  for(temp2=temp1->getNext(); temp2 != temp1; temp2=temp2->getNext())
-    {
-      if(DBG_edgesIntersect(temp1, temp2))
-	{
-	  return 1;
-	}
-
-    }
-
-  for(temp1=poly->getNext(); temp1 != poly; temp1 = temp1->getNext())
-    for(temp2=temp1->getNext(); temp2 != temp1; temp2=temp2->getNext())
-      {
-	if(DBG_edgesIntersect(temp1, temp2))
-	  {
-	    return 1;
-	  }
-      }
-  return 0;
-}
-
-/*check whether a line segment intersects a  polygon
- */
-Int DBG_edgeIntersectPoly(directedLine* edge, directedLine* poly)
-{
-  directedLine* temp;
-  if(DBG_edgesIntersect(edge, poly))
-    return 1;
-  for(temp=poly->getNext(); temp != poly; temp=temp->getNext())
-    if(DBG_edgesIntersect(edge, temp))
-      return 1;
-  return 0;
-}
-
-/*check whether two polygons intersect
- */
-Int DBG_polygonsIntersect(directedLine* p1, directedLine* p2)
-{
-  directedLine* temp;
-  if(DBG_edgeIntersectPoly(p1, p2))
-    return 1;
-  for(temp=p1->getNext(); temp!= p1; temp = temp->getNext())
-    if(DBG_edgeIntersectPoly(temp, p2))
-      return 1;
-  return 0;
-}
-
-/*check whether there are polygons intersecting each other in
- *a list of polygons
- */
-Int DBG_polygonListIntersect(directedLine* pList)
-{
-  directedLine *temp;
-  for(temp=pList; temp != NULL; temp = temp->getNextPolygon())
-    if(DBG_polygonSelfIntersect(temp))
-      return 1;
-  directedLine* temp2;
-  for(temp=pList; temp!=NULL; temp=temp->getNextPolygon())
-    {
-      for(temp2=temp->getNextPolygon(); temp2 != NULL; temp2=temp2->getNextPolygon())
-	if(DBG_polygonsIntersect(temp, temp2))
-	  return 1;
-    }
-
-  return 0;
-}
-
-
-Int DBG_isCounterclockwise(directedLine* poly)
-{
-  return (poly->polyArea() > 0);
-}
-
-/*ray: v0 with direction (dx,dy).
- *edge: v1-v2.
- * the extra point v10[2] is given for the information at
- *v1. Basically this edge is connectd to edge
- * v10-v1. If v1 is on the ray,
- * then we need v10  to determine whether this ray intersects
- * the edge or not (that is, return 1 or return 0).
- * If v1 is on the ray, then if v2 and v10 are on the same side of the ray,
- * we return 0, otherwise return 1.
- *For v2, if v2 is on the ray, we always return 0.
- *Notice that v1 and v2 are not symmetric. So the edge is directed!!!
- * The purpose for this convention is such that: a point is inside a polygon
- * if and only if it intersets with odd number of edges.
- */
-Int DBG_rayIntersectEdge(Real v0[2], Real dx, Real dy, Real v10[2], Real v1[2], Real v2[2])
-{
-/*
-if( (v1[1] >= v0[1] && v2[1]<= v0[1] )
-  ||(v2[1] >= v0[1] && v1[1]<= v0[1] )
-   )
-  printf("rayIntersectEdge, *********\n");
-*/
-
-  Real denom = (v2[0]-v1[0])*(-dy) - (v2[1]-v1[1]) * (-dx);
-  Real nomRay = (v2[0]-v1[0]) * (v0[1] - v1[1]) - (v2[1]-v1[1])*(v0[0]-v1[0]);
-  Real nomEdge = (v0[0]-v1[0]) * (-dy) - (v0[1]-v1[1])*(-dx);
-
-
-  /*if the ray is parallel to the edge, return 0: not intersect*/
-  if(denom == 0.0)
-    return 0;
-
-  /*if v0 is on the edge, return 0: not intersect*/
-  if(nomRay == 0.0)
-    return 0;
-
-  /*if v1 is on the positive ray, and the neighbor of v1 crosses the ray
-   *return 1: intersect
-   */
-  if(nomEdge == 0)
-    { /*v1 is on the positive or negative ray*/
-
-/*
-      printf("v1 is on the ray\n");
-*/
-
-      if(dx*(v1[0]-v0[0])>=0 && dy*(v1[1]-v0[1])>=0) /*v1 on positive ray*/
-	{
-	  if(area(v0, v1, v10) * area(v0, v1, v2) >0)
-	    return 0;
-	  else
-	    return 1;
-	}
-      else /*v1 on negative ray*/
-	return 0;
-    }
-
-  /*if v2 is on the ray, always return 0: not intersect*/
-  if(nomEdge == denom) {
-/*    printf("v2 is on the ray\n");*/
-    return 0;
-  }
-
-  /*finally */
-  if(denom*nomRay>0 && denom*nomEdge>0 && nomEdge/denom <=1.0)
-    return 1;
-  return 0;
-}
-
-
-/*return the number of intersections*/
-Int DBG_rayIntersectPoly(Real v0[2], Real dx, Real dy, directedLine* poly)
-{
-  directedLine* temp;
-  Int count=0;
-  if(DBG_rayIntersectEdge(v0, dx, dy, poly->getPrev()->head(), poly->head(), poly->tail()))
-    count++;
-
-  for(temp=poly->getNext(); temp != poly; temp = temp->getNext())
-    if(DBG_rayIntersectEdge(v0, dx, dy, temp->getPrev()->head(), temp->head(), temp->tail()))
-      count++;
-/*printf("ray intersect poly: count=%i\n", count);*/
-  return count;
-}
-
-Int DBG_pointInsidePoly(Real v[2], directedLine* poly)
-{
-/*
-printf("enter pointInsidePoly , v=(%f,%f)\n", v[0], v[1]);
-printf("the polygon is\n");
-poly->printList();
-*/
-  /*for debug purpose*/
-  assert( (DBG_rayIntersectPoly(v,1,0,poly) % 2 )
-	 == (DBG_rayIntersectPoly(v,1,Real(0.1234), poly) % 2 )
-	 );
-  if(DBG_rayIntersectPoly(v, 1, 0, poly) % 2 == 1)
-    return 1;
-  else
-    return 0;
-}
-
-/*return the number of polygons which contain thie polygon
- * as a subset
- */
-Int DBG_enclosingPolygons(directedLine* poly, directedLine* list)
-{
-  directedLine* temp;
-  Int count=0;
-/*
-printf("%i\n", DBG_pointInsidePoly(poly->head(),
-				   list->getNextPolygon()
-				   ->getNextPolygon()
-				   ->getNextPolygon()
-				   ->getNextPolygon()
-));
-*/
-
-  for(temp = list; temp != NULL; temp = temp->getNextPolygon())
-    {
-      if(poly != temp)
-	if(DBG_pointInsidePoly(poly->head(), temp))
-	  count++;
-/*	printf("count=%i\n", count);*/
-    }
-  return count;
-}
-
-void  DBG_reverse(directedLine* poly)
-{
-  if(poly->getDirection() == INCREASING)
-    poly->putDirection(DECREASING);
-  else
-    poly->putDirection(INCREASING);
-
-  directedLine* oldNext = poly->getNext();
-  poly->putNext(poly->getPrev());
-  poly->putPrev(oldNext);
-
-  directedLine* temp;
-  for(temp=oldNext; temp!=poly; temp = oldNext)
-    {
-      if(temp->getDirection() == INCREASING)
-	temp->putDirection(DECREASING);
-      else
-	temp->putDirection(INCREASING);
-
-      oldNext = temp->getNext();
-      temp->putNext(temp->getPrev());
-      temp->putPrev(oldNext);
-    }
-  printf("reverse done\n");
-}
-
-Int DBG_checkConnectivity(directedLine *polygon)
-{
-  if(polygon == NULL) return 1;
-  directedLine* temp;
-  if(polygon->head()[0] != polygon->getPrev()->tail()[0] ||
-     polygon->head()[1] != polygon->getPrev()->tail()[1])
-    return 0;
-  for(temp=polygon->getNext(); temp != polygon; temp=temp->getNext())
-    {
-      if(temp->head()[0] != temp->getPrev()->tail()[0] ||
-	 temp->head()[1] != temp->getPrev()->tail()[1])
-	return 0;
-    }
-  return 1;
-}
-
-/*print out error message.
- *If it cannot modify the polygon list to make it satify the
- *requirements, return 1.
- *otherwise modify the polygon list, and return 0
- */
-Int DBG_check(directedLine *polyList)
-{
-  directedLine* temp;
-  if(polyList == NULL) return 0;
-
-  /*if there are intersections, print out error message
-   */
-  if(DBG_polygonListIntersect(polyList))
-    {
-      fprintf(stderr, "DBG_check: there are self intersections, don't know to modify the polygons\n");
-    return 1;
-    }
-
-  /*check the connectivity of each polygon*/
-  for(temp = polyList; temp!= NULL; temp = temp ->getNextPolygon())
-    {
-      if(! DBG_checkConnectivity(temp))
-	{
-	  fprintf(stderr, "DBG_check, polygon not connected\n");
-	  return 1;
-	}
-    }
-
-  /*check the orientation of each polygon*/
-  for(temp = polyList; temp!= NULL; temp = temp ->getNextPolygon())
-    {
-
-
-      Int correctDir;
-
-      if( DBG_enclosingPolygons(temp, polyList) % 2 == 0)
-	correctDir = 1; /*counterclockwise*/
-      else
-	correctDir = 0; /*clockwise*/
-
-      Int actualDir = DBG_isCounterclockwise(temp);
-
-      if(correctDir != actualDir)
-	{
-	  fprintf(stderr, "DBG_check: polygon with incorrect orientations. reversed\n");
-
-	  DBG_reverse(temp);
-	}
-
-    }
-  return 0;
-}
-
-/**************handle self intersections*****************/
-//determine whether e interects [begin, end] or not
-static directedLine* DBG_edgeIntersectChainD(directedLine *e,
-			       directedLine *begin, directedLine *end)
-{
-  directedLine *temp;
-  for(temp=begin; temp != end; temp = temp->getNext())
-    {
-      if(DBG_edgesIntersect(e, temp))
-	 return temp;
-    }
-  if(DBG_edgesIntersect(e, end))
-    return end;
-  return NULL;
-}
-
-//given a polygon, cut the edges off and finally obtain a
-//a polygon without intersections. The cut-off edges are
-//dealloated. The new polygon is returned.
-directedLine* DBG_cutIntersectionPoly(directedLine *polygon, int& cutOccur)
-{
-  directedLine *begin, *end, *next;
-  begin = polygon;
-  end = polygon;
-  cutOccur = 0;
-  while( (next = end->getNext()) != begin)
-    {
-      directedLine *interc = NULL;
-      if( (interc = DBG_edgeIntersectChainD(next, begin, end)))
-	{
-	  int fixed = 0;
-	  if(DBG_edgesIntersect(next, interc->getNext()))
-	     {
-	       //trying to fix it
-	       Real buf[2];
-	       int i;
-	       Int n=5;
-	       buf[0] = interc->tail()[0];
-	       buf[1] = interc->tail()[1];
-
-	       for(i=1; i<n; i++)
-		 {
-		   Real r = ((Real)i) / ((Real) n);
-		   Real u = (1-r) * interc->head()[0] + r * interc->tail()[0];
-		   Real v = (1-r) * interc->head()[1] + r * interc->tail()[1];
-		   interc->tail()[0] = interc->getNext()->head()[0] = u;
-		   interc->tail()[1] = interc->getNext()->head()[1] = v;
-		   if( (! DBG_edgesIntersect(next, interc)) &&
-		      (! DBG_edgesIntersect(next, interc->getNext())))
-		     break; //we fixed it
-		 }
-	       if(i==n) // we didn't fix it
-		 {
-		   fixed = 0;
-		   //back to original
-		   interc->tail()[0] = interc->getNext()->head()[0] = buf[0];
-		   interc->tail()[1] = interc->getNext()->head()[1] = buf[1];
-		 }
-	       else
-		 {
-		   fixed = 1;
-		 }
-	     }
-	  if(fixed == 0)
-	    {
-	      cutOccur = 1;
-	      begin->deleteSingleLine(next);
-
-	      if(begin != end)
-		{
-		  if(DBG_polygonSelfIntersect(begin))
-		    {
-		      directedLine* newEnd = end->getPrev();
-		      begin->deleteSingleLine(end);
-		      end = newEnd;
-		    }
-		}
-	    }
-	  else
-	    {
-	      end = end->getNext();
-	    }
-	}
-      else
-	{
-	  end = end->getNext();
-	}
-    }
-  return begin;
-}
-
-//given a polygon, cut the edges off and finally obtain a
-//a polygon without intersections. The cut-off edges are
-//dealloated. The new polygon is returned.
-#if 0 // UNUSED
-static directedLine* DBG_cutIntersectionPoly_notwork(directedLine *polygon)
-{
-  directedLine *crt;//current polygon
-  directedLine *begin;
-  directedLine *end;
-  directedLine *temp;
-  crt = polygon;
-  int find=0;
-  while(1)
-    {
-//printf("loop\n");
-      //if there are less than 3 edges, we should stop
-      if(crt->getPrev()->getPrev() == crt)
-	return NULL;
-
-      if(DBG_edgesIntersect(crt, crt->getNext()) ||
-	(crt->head()[0] == crt->getNext()->tail()[0] &&
-	crt->head()[1] == crt->getNext()->tail()[1])
-	 )
-	{
-	  find = 1;
-	  crt=crt->deleteChain(crt, crt->getNext());
-	}
-      else
-	{
-	  //now we know crt and crt->getNext do not intersect
-	  begin = crt;
-	  end = crt->getNext();
-//printf("begin=(%f,%f)\n", begin->head()[0], begin->head()[1]);
-//printf("end=(%f,%f)\n", end->head()[0], end->head()[1]);
-	  for(temp=end->getNext(); temp!=begin; temp= temp->getNext())
-	    {
-//printf("temp=(%f,%f)\n", temp->head()[0], temp->head()[1]);
-	       directedLine *intersect = DBG_edgeIntersectChainD(temp, begin, end);
-	       if(intersect != NULL)
-		{
-		  crt = crt->deleteChain(intersect, temp);
-		  find=1;
-		  break; //the for loop
-		}
-	      else
-		{
-		  end = temp;
-		}
-	    }
-	}
-      if(find == 0)
-	return crt;
-      else
-	find = 0;    //go to next loop
-}
-}
-#endif
-
-directedLine* DBG_cutIntersectionAllPoly(directedLine* list)
-{
-  directedLine* temp;
-  directedLine* tempNext=NULL;
-  directedLine* ret = NULL;
-  int cutOccur=0;
-  for(temp=list; temp != NULL; temp = tempNext)
-    {
-      directedLine *left;
-      tempNext = temp->getNextPolygon();
-
-      left = DBG_cutIntersectionPoly(temp, cutOccur);
-      if(left != NULL)
-	ret=left->insertPolygon(ret);
-    }
-  return ret;
-}
-
-sampledLine*  DBG_collectSampledLinesAllPoly(directedLine *polygonList)
-{
-  directedLine *temp;
-  sampledLine* tempHead = NULL;
-  sampledLine* tempTail = NULL;
-  sampledLine* cHead = NULL;
-  sampledLine* cTail = NULL;
-
-  if(polygonList == NULL)
-    return NULL;
-
-  DBG_collectSampledLinesPoly(polygonList, cHead, cTail);
-
-  assert(cHead);
-  assert(cTail);
-  for(temp = polygonList->getNextPolygon(); temp != NULL; temp = temp->getNextPolygon())
-    {
-      DBG_collectSampledLinesPoly(temp, tempHead, tempTail);
-      cTail->insert(tempHead);
-      cTail = tempTail;
-    }
-  return cHead;
-}
-
-void  DBG_collectSampledLinesPoly(directedLine *polygon, sampledLine*& retHead, sampledLine*& retTail)
-{
-  directedLine *temp;
-  retHead = NULL;
-  retTail = NULL;
-  if(polygon == NULL)
-    return;
-
-  retHead = retTail = polygon->getSampledLine();
-  for(temp = polygon->getNext(); temp != polygon; temp=temp->getNext())
-    {
-      retHead = temp->getSampledLine()->insert(retHead);
-    }
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/polyDBG.h b/src/glu/sgi/libnurbs/nurbtess/polyDBG.h
deleted file mode 100644
index 74843d88879..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/polyDBG.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _POLYDBG_H
-#define _POLYDBG_H
-
-#include "definitions.h"
-#include "directedLine.h"
-#include "monoTriangulation.h"
-
-Int DBG_edgesIntersectGen(Real A[2], Real B[2], Real C[2], Real D[2]);
-Int DBG_intersectChain(vertexArray* chain, Int start, Int end, Real A[2], Real B[2]);
-  
-
-Int DBG_edgesIntersect(directedLine* l1, directedLine* l2);
-Int DBG_polygonSelfIntersect(directedLine* poly);
-Int DBG_edgeIntersectPoly(directedLine* edge, directedLine* poly);
-Int DBG_polygonsIntersect(directedLine* p1, directedLine* p2);
-Int DBG_polygonListIntersect(directedLine* pList);
-
-Int DBG_isCounterclockwise(directedLine* poly);
-Int DBG_rayIntersectEdge(Real v0[2], Real dx, Real dy, Real v10[2], Real v1[2], Real v2[2]);
-Int DBG_pointInsidePoly(Real v[2], directedLine* poly);
-Int DBG_enclosingPolygons(directedLine* poly, directedLine* list);
-void  DBG_reverse(directedLine* poly);
-Int DBG_check(directedLine *polyList);
-
-Int DBG_isConvex(directedLine *poly);
-Int DBG_is_U_direction(directedLine *poly);
-Int DBG_is_U_monotone(directedLine* poly);
-
-directedLine* DBG_cutIntersectionAllPoly(directedLine* list);
-directedLine* DBG_cutIntersectionPoly(directedLine *polygon, int& cutOccur);
-
-sampledLine*  DBG_collectSampledLinesAllPoly(directedLine *polygonList);
-
-void  DBG_collectSampledLinesPoly(directedLine *polygon, sampledLine*& retHead, sampledLine*& retTail);
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/polyUtil.cc b/src/glu/sgi/libnurbs/nurbtess/polyUtil.cc
deleted file mode 100644
index f9a27f402ca..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/polyUtil.cc
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-
-#include "polyUtil.h"
-
-Real area(Real A[2], Real B[2], Real C[2])
-{
-  Real Bx, By, Cx, Cy;
-  Bx = B[0] - A[0];
-  By = B[1] - A[1];
-  Cx = C[0] - A[0];
-  Cy = C[1] - A[1];
-  return Bx*Cy - Cx*By;
-
-/*  return (B[0]-A[0])*(C[1]-A[1]) - (C[0]-A[0])*(B[1]-A[1]);*/
-}
-
-/*given a directed line A->B, and a point P, 
- *determine whether P is to the left of AB.
- *the line A->B (imagine it has beedn extended both 
- *end to the infinity) divides the plan into two 
- *half planes. When we walk from A to B, one
- *half is to the left and the other half is to the right.
- *return 1 if P is to the left.
- *if P is on AB, 0 is returned.
- */
-Int pointLeftLine(Real A[2], Real B[2],  Real P[2])
-{
-  if(area(A, B, P) >0) return 1;
-  else return 0;
-}
-
-/*given two directed line: A -> B -> C, and another point P.
- *determine whether P is to the left hand side of A->B->C.
- *Think of BA and BC extended as two rays. So that the plane is
- * divided into two parts. One part is to the left we  walk from A 
- *to B and to C, the other part is to the right.
- * In order for P to be the left, P must be either to the left 
- *of 
- */
-Int pointLeft2Lines(Real A[2], Real B[2], Real C[2], Real P[2])
-{
-  Int C_left_AB = (area(A, B, C)>0);
-  Int P_left_AB = (area(A, B, P)>0);
-  Int P_left_BC = (area(B, C, P)>0);
-
-  if(C_left_AB)
-    {
-      return (P_left_AB && P_left_BC);
-    }
-  else
-    return  (P_left_AB || P_left_BC);
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/polyUtil.h b/src/glu/sgi/libnurbs/nurbtess/polyUtil.h
deleted file mode 100644
index 1ca2ebcc074..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/polyUtil.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _POLYUTIL_H
-#define _POLYUTIL_H
-
-#include "definitions.h"
-#ifdef __cplusplus
-extern "C" {
-#endif
-Real area(Real A[2], Real B[2], Real C[2]);
-
-Int pointLeftLine(Real A[2], Real B[2],  Real P[2]);
-Int pointLeft2Lines(Real A[2], Real B[2], Real C[2], Real P[2]);
-#ifdef __cplusplus
-}
-#endif
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc b/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc
deleted file mode 100644
index dfdbd4e8448..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <assert.h>
-#include <GL/gl.h> 
-
-#include "primitiveStream.h"
-
-Int primStream::num_triangles()
-{
-  Int i;
-  Int ret=0;
-  for(i=0; i<index_lengths; i++)
-    {
-      ret += lengths[i]-2;
-    }
-  return ret;
-}
-
-	  
-
-/*the begining of inserting a new primitive. 
- *reset counter to be 0.
- */
-void primStream::begin()
-{
-  counter = 0;
-}
-
-void primStream::insert(Real u, Real v)
-{
-  /*if the space cannot hold u and v,
-   *we have to expand the array
-   */
-  if(index_vertices+1 >= size_vertices) {
-    Real* temp = (Real*) malloc (sizeof(Real) * (2*size_vertices + 2));
-    assert(temp);
-    
-    /*copy*/
-    for(Int i=0; i<index_vertices; i++)
-      temp[i] = vertices[i];
-    
-    free(vertices);
-    vertices = temp;
-    size_vertices = 2*size_vertices + 2;
-  }
-
-  vertices[index_vertices++] = u;
-  vertices[index_vertices++] = v;
-  counter++;
-}
-
-/*the end of a primitive.
- *increase index_lengths 
- */
-void primStream::end(Int type)
-{
-  Int i;
-  /*if there is no vertex in this primitive, 
-   *nothing needs to be done
-   */
-  if(counter == 0) return ;
-
-  if(index_lengths >= size_lengths){
-    Int* temp = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
-    assert(temp);
-    Int* tempTypes = (Int*) malloc(sizeof(Int) * (2*size_lengths + 2));
-    assert(tempTypes);
-    
-    /*copy*/
-    for(i=0; i<index_lengths; i++){
-      temp[i] = lengths[i];
-      tempTypes[i] = types[i];
-    }
-    
-    free(lengths);
-    free(types);
-    lengths = temp;
-    types = tempTypes;
-    size_lengths = 2*size_lengths + 2;
-  }
-  lengths[index_lengths] = counter;
-  types[index_lengths] = type;
-  index_lengths++;
-}
-
-void primStream::print()
-{
-  Int i,j,k;
-  printf("index_lengths=%i,size_lengths=%i\n", index_lengths, size_lengths);
-  printf("index_vertices=%i,size_vertices=%i\n", index_vertices, size_vertices);
-  k=0;
-  for(i=0; i<index_lengths; i++)
-    {
-      if(types[i] == PRIMITIVE_STREAM_FAN)
-	printf("primitive-FAN:\n");
-      else 
-	printf("primitive-STRIP:\n");
-      for(j=0; j<lengths[i]; j++)
-	{
-	  printf("(%f,%f) ", vertices[k], vertices[k+1]);
-	  k += 2;	  
-	}
-      printf("\n");
-    }
-}
-
-primStream::primStream(Int sizeLengths, Int sizeVertices)
-{
-  lengths = (Int*)malloc (sizeof(Int) * sizeLengths);
-  assert(lengths);
-  types = (Int*)malloc (sizeof(Int) * sizeLengths);
-  assert(types);
-  
-  vertices = (Real*) malloc(sizeof(Real) * sizeVertices);
-  assert(vertices);
-  
-  index_lengths = 0;
-  index_vertices = 0;
-  size_lengths = sizeLengths;
-  size_vertices = sizeVertices; 
-
-  counter = 0; 
-}
-
-primStream::~primStream()
-{
-  free(lengths);
-  free(types);
-  free(vertices);
-}
-
-void primStream::draw()
-{
-  Int i,j,k;
-  k=0;
-  for(i=0; i<index_lengths; i++)
-    {
-      switch(types[i]){
-      case PRIMITIVE_STREAM_FAN:
-	glBegin(GL_TRIANGLE_FAN);
-	break;
-      case PRIMITIVE_STREAM_STRIP:
-	glBegin(GL_TRIANGLE_STRIP);
-	break;
-      }
-      
-      for(j=0; j<lengths[i]; j++){
-	glVertex2fv(vertices+k);
-	k += 2;
-      }
-      glEnd();
-    }
-}
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/primitiveStream.h b/src/glu/sgi/libnurbs/nurbtess/primitiveStream.h
deleted file mode 100644
index b4174f1466f..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/primitiveStream.h
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-/*we do not use the constans GL_... so that this file is independent of 
- *<GL/gl.h>
- */
-
-#ifndef _PRIMITIVE_STREAM_H
-#define _PRIMITIVE_STREAM_H
-
-enum {PRIMITIVE_STREAM_FAN, PRIMITIVE_STREAM_STRIP};
-
-#include "definitions.h"
-
-class primStream {
-  Int *lengths; /*length[i]=number of vertices of ith primitive*/
-  Int *types; /*each primive has a type: FAN or STREAM*/
-  Real *vertices; /*the size >= 2 * num_vertices, each vertex (u,v)*/
-
-  /*the following size information are used for dynamic arrays*/
-  Int index_lengths; /*the current available entry*/
-  Int size_lengths; /*the allocated size of the array: lengths*/
-  Int index_vertices;
-  Int size_vertices;
-
-  /*the vertex is inserted one by one. counter is used to 
-   *count the number of vertices which have been inserted so far in 
-   *the current primitive
-   */
-  Int counter;
-
-public:  
-  primStream(Int sizeLengths, Int sizeVertices);
-  ~primStream();
-
-  Int get_n_prims() //num of primitives
-    {
-      return index_lengths;
-    }
-  Int get_type(Int i)  //the type of ith primitive
-    {
-      return  types[i];
-    }
-  Int get_length(Int i) //the length of the ith primitive
-    {
-      return lengths[i];
-    }
-  Real* get_vertices() {return vertices;}
-
-  /*the begining of inserting a new primitive. 
-   *reset counter to be 0.
-   */
-  void begin();
-  void insert(Real u, Real v);
-  void insert(Real v[2]) {insert(v[0], v[1]);}
-  void end(Int type);
-  
-  Int num_triangles();
-  
-  void triangle(Real A[2], Real B[2], Real C[2])
-    {
-      begin();
-      insert(A);
-      insert(B);
-      insert(C);
-      end(PRIMITIVE_STREAM_FAN);
-    }
-  void print();
-  void draw(); /*using GL to draw the primitives*/
-};
-
-
-
-
-
-
-  
-
-#endif
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/quicksort.cc b/src/glu/sgi/libnurbs/nurbtess/quicksort.cc
deleted file mode 100644
index 9d0b290b393..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/quicksort.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-
-
-static void swap(void *v[], int i, int j)
-{
-  void *temp;
-  temp = v[i];
-  v[i] = v[j];
-  v[j] = temp;
-}
-
-/*as an example to use this function to
- *sort integers, you need to supply the function
- *int comp(int *i1, int *i2)
- *{
- *  if( *i1 < * i2) return -1;
- *  else return 1;
- *}
- *and an array of pointers to integers: 
- * int *v[100] (allocate space for where  each v[i] points to).
- *then you can call:
- * quicksort( (void**)v, left, right, (int (*)(void *, void *))comp)
- */
-void quicksort(void *v[], int left, int right,
-	       int (*comp) (void *, void *))
-{
-  int i, last;
-  if(left >= right) /*do nothing if array contains */
-    return;         /*fewer than two elements*/
-  
-  swap(v, left, (left+right)/2);
-  last = left;
-  for(i=left+1; i<=right; i++)
-    if((*comp)(v[i], v[left])<0)
-      swap(v, ++last, i);
-  swap(v, left, last);
-  quicksort(v, left, last-1, comp);
-  quicksort(v, last+1, right, comp);
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/quicksort.h b/src/glu/sgi/libnurbs/nurbtess/quicksort.h
deleted file mode 100644
index 3a8dcd6a2cf..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/quicksort.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _QUICKSORT_H
-#define _QUICKSORT_H
-
-#include <stdlib.h>
-#include <stdio.h>
-
-void quicksort(void *v[], int left, int right,
-	       int (*comp) (void *, void *));
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc b/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc
deleted file mode 100644
index f457b157336..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include "glimports.h"
-#include "zlassert.h"
-#include <GL/gl.h>
-
-#include "rectBlock.h"
-
-rectBlock::rectBlock(gridBoundaryChain* left, gridBoundaryChain* right, Int beginVline, Int endVline)
-{
-  Int i;
-
-
-  upGridLineIndex = left->getVlineIndex(beginVline);
-
-  lowGridLineIndex = left->getVlineIndex(endVline);
-
-  Int n = upGridLineIndex-lowGridLineIndex+1; //number of grid lines
-  leftIndices = (Int*) malloc(sizeof(Int) * n);
-  assert(leftIndices);
-  rightIndices = (Int*) malloc(sizeof(Int) * n);
-  assert(rightIndices);
-  for(i=0; i<n; i++)
-    {
-
-      leftIndices[i] = left->getInnerIndex(i+beginVline);
-      rightIndices[i] = right->getInnerIndex(i+beginVline);
-    }
-}
-
-
-rectBlock::~rectBlock()
-{
-  free(leftIndices);
-  free(rightIndices);
-}
-
-void rectBlock::print()
-{
-  Int i;
-  printf("block:\n");
-  for(i=upGridLineIndex; i >= lowGridLineIndex; i--)
-    {
-      printf("gridline %i, (%i,%i)\n", i, leftIndices[upGridLineIndex-i], rightIndices[upGridLineIndex-i]);
-    }
-}
-
-
-
-void rectBlock::draw(Real* u_values, Real* v_values)
-{
-  Int i,j,k;
-  //upgrid line to bot grid line
-#ifdef DEBUG
-printf("upGridLineIndex=%i, lowGridLineIndex=%i\n", upGridLineIndex, lowGridLineIndex);
-#endif
-  for(k=0, i=upGridLineIndex; i > lowGridLineIndex; i--, k++)
-    {
-      glBegin(GL_QUAD_STRIP);
-
-      for(j=leftIndices[k+1]; j<= rightIndices[k+1]; j++)
-	{
-	  glVertex2f(u_values[j], v_values[i]);
-	  glVertex2f(u_values[j], v_values[i-1]);
-	}
-      glEnd();
-    }  
-}
-
-
-Int rectBlock::num_quads()
-{
-  Int ret=0;
-  Int k,i;
-  for(k=0, i=upGridLineIndex; i>lowGridLineIndex; i--, k++)
-    {
-      ret += (rightIndices[k+1]-leftIndices[k+1]);
-    }
-  return ret;
-}
-
-Int rectBlockArray::num_quads()
-{
-  Int ret=0;
-  for(Int i=0; i<n_elements; i++)
-    ret += array[i]->num_quads();
-  return ret;
-}
-
-rectBlockArray::rectBlockArray(Int s)
-{
-  Int i;
-  n_elements = 0;
-  size = s;
-  array = (rectBlock**) malloc(sizeof(rectBlock*) * s);
-  assert(array);
-//initialization
-  for(i=0; i<s; i++)
-    array[i] = NULL;
-}
-
-rectBlockArray::~rectBlockArray()
-{
-  Int i;
-  for(i=0; i<size; i++)
-    {
-      if(array[i] != NULL)
-	delete array[i];
-    }
-  free(array);
-}
-
-//put to the end of the array, check the size
-void rectBlockArray::insert(rectBlock* newBlock)
-{
-  Int i;
-  if(n_elements == size) //full
-    {
-      rectBlock** temp = (rectBlock**) malloc(sizeof(rectBlock) * (2*size+1));
-      assert(temp);
-      //initialization
-      for(i=0; i<2*size+1; i++)
-	temp[i] = NULL;
-      
-      for(i=0; i<n_elements; i++)
-	temp[i] = array[i];
-      
-      free(array);
-      array = temp;
-      size = 2*size +  1;
-    }
-  
-  array[n_elements++] = newBlock;
-}
-
-void rectBlockArray::print()
-{
-  Int i;
-  for(i=0; i<n_elements; i++)
-    array[i]->print();
-}
-
-void rectBlockArray::draw(Real* u_values, Real* v_values)
-{
-  Int i;
-  for(i=0; i<n_elements; i++)
-    array[i]->draw(u_values, v_values);
-}
-
-
-
-
-
-
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/rectBlock.h b/src/glu/sgi/libnurbs/nurbtess/rectBlock.h
deleted file mode 100644
index 8dbd7eb819d..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/rectBlock.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _RECTBLOCK_H
-#define _RECTBLOCK_H
-
-#include "definitions.h"
-#include "gridWrap.h"
-
-class rectBlock{
-  Int upGridLineIndex;
-  Int lowGridLineIndex;
-  Int* leftIndices; //up to bottome
-  Int* rightIndices; //up to bottom
-public:
-  //the arrays are copies.
-  rectBlock(gridBoundaryChain* left, gridBoundaryChain* right, Int beginVline, Int endVline);
-  ~rectBlock(); //free the two arrays
-
-  Int get_upGridLineIndex() {return upGridLineIndex;}
-  Int get_lowGridLineIndex() {return lowGridLineIndex;}
-  Int* get_leftIndices() {return leftIndices;}
-  Int* get_rightIndices() {return rightIndices;}
-
-  Int num_quads();
-
-  void print();
-  void draw(Real* u_values, Real* v_values);
-};
-
-
-class rectBlockArray{
-  rectBlock** array;
-  Int n_elements;
-  Int size;
-public:
-  rectBlockArray(Int s);
-  ~rectBlockArray();//delete avarything including the blocks
-  
-  Int get_n_elements() {return n_elements;}
-  rectBlock* get_element(Int i) {return array[i];}
-  void insert(rectBlock* newBlock); //only take the pointer, not ther cotent
-
-  Int num_quads();
-
-  void print();
-  void draw(Real* u_values, Real* v_values);
-};
-  
-
-
-#endif
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc b/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc
deleted file mode 100644
index 861c71bb380..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc
+++ /dev/null
@@ -1,371 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "glimports.h"
-#include "sampleComp.h"
-#include "sampleCompTop.h"
-#include "sampleCompBot.h"
-#include "sampleCompRight.h"
-
-
-
-#define max(a,b) ((a>b)? a:b)
-#define min(a,b) ((a>b)? b:a)
-
-void sampleConnectedComp(Real* topVertex, Real* botVertex,
-		    vertexArray* leftChain, 
-		    Int leftStartIndex, Int leftEndIndex,
-		    vertexArray* rightChain,
-		    Int rightStartIndex, Int rightEndIndex,
-		    gridBoundaryChain* leftGridChain,
-		    gridBoundaryChain* rightGridChain,
-		    Int gridIndex1, Int gridIndex2,
-		    Int up_leftCornerWhere,
-		    Int up_leftCornerIndex,
-		    Int up_rightCornerWhere,
-		    Int up_rightCornerIndex,
-		    Int down_leftCornerWhere,
-		    Int down_leftCornerIndex,
-		    Int down_rightCornerWhere,
-		    Int down_rightCornerIndex,
-		    primStream* pStream,
-		    rectBlockArray* rbArray
-		    )
-{
-
- sampleCompLeft(topVertex, botVertex,
-		leftChain,
-		leftStartIndex,	leftEndIndex,
-		rightChain,
-		rightStartIndex, rightEndIndex,
-		leftGridChain,
-		gridIndex1,
-		gridIndex2,
-		up_leftCornerWhere,
-		up_leftCornerIndex,
-		down_leftCornerWhere,
-		down_leftCornerIndex,
-		pStream);
-
-
- sampleCompRight(topVertex, botVertex,
-		 leftChain,
-		 leftStartIndex, leftEndIndex,
-		 rightChain,
-		 rightStartIndex,
-		 rightEndIndex,
-		 rightGridChain,
-		 gridIndex1, gridIndex2,
-		 up_rightCornerWhere,
-		 up_rightCornerIndex,
-		 down_rightCornerWhere,
-		 down_rightCornerIndex,
-		 pStream);
-		 
-
- sampleCompTop(topVertex,
-		     leftChain,
-		     leftStartIndex,
-		     rightChain,
-		     rightStartIndex,
-		     leftGridChain,
-		     rightGridChain,
-		     gridIndex1,
-		     up_leftCornerWhere,
-		     up_leftCornerIndex,
-		     up_rightCornerWhere,
-		     up_rightCornerIndex,
-		     pStream);
-
- sampleCompBot(botVertex,
-		     leftChain,
-		     leftEndIndex,
-		     rightChain,
-		     rightEndIndex,
-		     leftGridChain,
-		     rightGridChain,
-		     gridIndex2,
-		     down_leftCornerWhere,
-		     down_leftCornerIndex,
-		     down_rightCornerWhere,
-		     down_rightCornerIndex,
-		     pStream);
-
-
- //the center
-
- rbArray->insert(new rectBlock(leftGridChain, rightGridChain, gridIndex1, gridIndex2));
-
-	
-}
-
-/*notice that we need rightChain because the 
- *corners could be on the rightChain.
- *here comp means component.
- */
-void sampleCompLeft(Real* topVertex, Real* botVertex,
-		    vertexArray* leftChain,
-		    Int leftStartIndex, Int leftEndIndex,
-		    vertexArray* rightChain,
-		    Int rightStartIndex, Int rightEndIndex,
-		    gridBoundaryChain* leftGridChain,
-		    Int gridIndex1, Int gridIndex2,
-		    Int up_leftCornerWhere,
-		    Int up_leftCornerIndex,
-		    Int down_leftCornerWhere,
-		    Int down_leftCornerIndex,
-		    primStream* pStream)
-{
-  /*find out whether there is a trim vertex which is
-   *inbetween the top and bot grid lines or not.
-   */
-  Int midIndex1;
-  Int midIndex2;
-  Int gridMidIndex1 = 0, gridMidIndex2 = 0;
-  //midIndex1: array[i] <= v, array[i-1] > v
-  //midIndex2: array[i] >= v, array[i+1] < v
-  // v(gridMidIndex1) >= v(midindex1) > v(gridMidIndex1+1)
-  // v(gridMidIndex2-1) >= v(midIndex2) > v(gridMidIndex2) ??
-  midIndex1 = leftChain->findIndexBelowGen(
-					   leftGridChain->get_v_value(gridIndex1),
-					   leftStartIndex,
-					   leftEndIndex);
-
-  midIndex2 = -1; /*initilization*/
-  if(midIndex1<= leftEndIndex && gridIndex1<gridIndex2)
-    if(leftChain->getVertex(midIndex1)[1] >= leftGridChain->get_v_value(gridIndex2))
-      {
-	midIndex2 = leftChain->findIndexAboveGen(
-						 leftGridChain->get_v_value(gridIndex2),
-						 midIndex1, //midIndex1 <= midIndex2.
-						 leftEndIndex);
-	gridMidIndex1  = leftGridChain->lookfor(leftChain->getVertex(midIndex1)[1],
-						gridIndex1, gridIndex2);
-	gridMidIndex2 = 1+leftGridChain->lookfor(leftChain->getVertex(midIndex2)[1],
-					       gridMidIndex1, gridIndex2);	
-      }
-
-
-  /*to interprete the corner information*/
-  Real* cornerTop;
-  Real* cornerBot;
-  Int cornerLeftStart;
-  Int cornerLeftEnd;
-  Int cornerRightUpEnd;
-  Int cornerRightDownStart;
-  if(up_leftCornerWhere == 0) /*left corner is on left chain*/
-    {
-      cornerTop = leftChain->getVertex(up_leftCornerIndex);
-      cornerLeftStart = up_leftCornerIndex+1;
-      cornerRightUpEnd = -1; /*no right*/
-    }
-  else if(up_leftCornerWhere == 1) /*left corner is on top*/
-    {
-      cornerTop = topVertex;
-      cornerLeftStart = leftStartIndex;
-      cornerRightUpEnd = -1; /*no right*/
-    }
-  else /*left corner is on right chain*/
-    {
-      cornerTop = topVertex;
-      cornerLeftStart = leftStartIndex;
-      cornerRightUpEnd = up_leftCornerIndex;
-    }
-  
-  if(down_leftCornerWhere == 0) /*left corner is on left chain*/
-    {
-      cornerBot = leftChain->getVertex(down_leftCornerIndex);
-      cornerLeftEnd = down_leftCornerIndex-1;
-      cornerRightDownStart = rightEndIndex+1; /*no right*/
-    }
-  else if(down_leftCornerWhere == 1) /*left corner is on bot*/
-    {
-      cornerBot = botVertex;
-      cornerLeftEnd = leftEndIndex;
-      cornerRightDownStart = rightEndIndex+1; /*no right*/
-    }
-  else /*left corner is on the right chian*/
-    {
-      cornerBot = botVertex;
-      cornerLeftEnd = leftEndIndex;
-      cornerRightDownStart = down_leftCornerIndex;
-    }
-      
-
-
-
-  /*sample*/
-  if(midIndex2 >= 0) /*there is a trim point inbewteen grid lines*/
-    {
-
-      sampleLeftSingleTrimEdgeRegionGen(cornerTop, leftChain->getVertex(midIndex1),
-					leftChain,
-					cornerLeftStart,
-					midIndex1-1,
-					leftGridChain,
-					gridIndex1,
-					gridMidIndex1,
-					rightChain,
-					rightStartIndex,
-					cornerRightUpEnd,
-					0, //no right down section
-					-1,
-					pStream);
-
-      sampleLeftSingleTrimEdgeRegionGen(leftChain->getVertex(midIndex2),
-					cornerBot,
-					leftChain,
-					midIndex2+1,
-					cornerLeftEnd,
-					leftGridChain,
-					gridMidIndex2,
-					gridIndex2,
-					rightChain,
-					0, //no right up section
-					-1,
-					cornerRightDownStart,
-					rightEndIndex,
-					pStream);
-
-
-      sampleLeftStripRecF(leftChain,
-			  midIndex1,
-			  midIndex2,
-			  leftGridChain,
-			  gridMidIndex1,
-			  gridMidIndex2,
-			  pStream);
-    }
-  else
-    {
-      sampleLeftSingleTrimEdgeRegionGen(cornerTop, cornerBot,
-					leftChain,
-					cornerLeftStart,
-					cornerLeftEnd,
-					leftGridChain,
-					gridIndex1,
-					gridIndex2,
-					rightChain,
-					rightStartIndex,
-					cornerRightUpEnd,
-					cornerRightDownStart,
-					rightEndIndex,
-					pStream);
-    }					 
-}
-		    
-void sampleLeftSingleTrimEdgeRegionGen(Real topVert[2], Real botVert[2],
-				       vertexArray* leftChain,
-				       Int leftStart,
-				       Int leftEnd,
-				       gridBoundaryChain* gridChain,
-				       Int gridBeginIndex,
-				       Int gridEndIndex,
-				       vertexArray* rightChain,
-				       Int rightUpBegin,
-				       Int rightUpEnd,
-				       Int rightDownBegin,
-				       Int rightDownEnd,
-				       primStream* pStream)
-{
-  Int i,j,k;
-
-  /*creat an array to store all the up and down secments of the right chain,
-   *and the left end grid points
-   *
-   *although vertex array is a dynamic array, but to gain efficiency,
-   *it is better to initiliza the exact array size
-   */
-  vertexArray vArray(gridEndIndex-gridBeginIndex+1 +
-		     max(0,rightUpEnd - rightUpBegin+1)+
-		     max(0,rightDownEnd - rightDownBegin+1));
-  
-  /*append the vertices on the up section of thr right chain*/
-  for(i=rightUpBegin; i<= rightUpEnd; i++)
-    vArray.appendVertex(rightChain->getVertex(i));
-  
-  /*append the vertices of the left extremal grid points,
-   *and at the same time, perform triangulation for the stair cases
-   */
-  vArray.appendVertex(gridChain->get_vertex(gridBeginIndex));
-
-  for(k=1, i=gridBeginIndex+1; i<=gridEndIndex; i++, k++)
-    {
-      vArray.appendVertex(gridChain->get_vertex(i));
-
-      /*output the fan of the grid points of the (i)th and (i-1)th grid line.
-       */
-      if(gridChain->getUlineIndex(i) < gridChain->getUlineIndex(i-1))
-	{
-	  pStream->begin();	  
-	  pStream->insert(gridChain->get_vertex(i-1));
-	  for(j=gridChain->getUlineIndex(i); j<= gridChain->getUlineIndex(i-1); j++)
-	    pStream->insert(gridChain->getGrid()->get_u_value(j), gridChain->get_v_value(i));
-	  pStream->end(PRIMITIVE_STREAM_FAN);
-	}
-      else if(gridChain->getUlineIndex(i) > gridChain->getUlineIndex(i-1))
-	{
-	  pStream->begin();
-	  pStream->insert(gridChain->get_vertex(i));
-	  for(j=gridChain->getUlineIndex(i); j>= gridChain->getUlineIndex(i-1); j--)
-	    pStream->insert(gridChain->getGrid()->get_u_value(j), gridChain->get_v_value(i-1));
-	  pStream->end(PRIMITIVE_STREAM_FAN);
-	}
-      /*otherwisem, the two are equal, so there is no fan to outout*/	  
-    }
-
-  /*then append all the vertices on the down section of the right chain*/
-  for(i=rightDownBegin; i<= rightDownEnd; i++)
-    vArray.appendVertex(rightChain->getVertex(i));  
-
-  monoTriangulationRecGen(topVert, botVert,
-			  leftChain, leftStart, leftEnd,
-			  &vArray, 0, vArray.getNumElements()-1,
-			  pStream);
-		     
-}
-
-
-
-
-
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleComp.h b/src/glu/sgi/libnurbs/nurbtess/sampleComp.h
deleted file mode 100644
index a3c1790254e..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleComp.h
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _SAMPLECOMP_H
-#define _SAMPLECOMP_H
-
-#include "sampleMonoPoly.h"
-#include "rectBlock.h"
-
-void sampleConnectedComp(Real* topVertex, Real* botVertex,
-		    vertexArray* leftChain, 
-		    Int leftStartIndex, Int botLeftIndex,
-		    vertexArray* rightChain,
-		    Int rightStartIndex, Int botRightIndex,
-		    gridBoundaryChain* leftGridChain,
-		    gridBoundaryChain* rightGridChain,
-		    Int gridIndex1, Int gridIndex2,
-		    Int up_leftCornerWhere,
-		    Int up_leftCornerIndex,
-		    Int up_rightCornerWhere,
-		    Int up_rightCornerIndex,
-		    Int down_leftCornerWhere,
-		    Int down_leftCornerIndex,
-		    Int down_rightCornerWhere,
-		    Int down_rightCornerIndex,
-		    primStream* pStream,
-		    rectBlockArray* rbArray
-		    );
-
-void sampleCompLeft(Real* topVertex, Real* botVertex,
-		    vertexArray* leftChain,
-		    Int leftStartIndex, Int leftEndIndex,
-		    vertexArray* rightChain,
-		    Int rightStartIndex, Int rightEndIndex,
-		    gridBoundaryChain* leftGridChain,
-		    Int gridIndex1, Int gridIndex2,
-		    Int up_leftCornerWhere,
-		    Int up_leftCornerIndex,
-		    Int down_leftCornerWhere,
-		    Int down_leftCornerIndex,
-		    primStream* pStream);
-
-void sampleLeftSingleTrimEdgeRegionGen(Real topVert[2], Real botVert[2],
-				       vertexArray* leftChain,
-				       Int leftStart,
-				       Int leftEnd,
-				       gridBoundaryChain* gridChain,
-				       Int gridBegindex,
-				       Int gridEndIndex,
-				       vertexArray* rightChain,
-				       Int rightUpBegin,
-				       Int rightUpEnd,
-				       Int rightDownBegin,
-				       Int rightDownEnd,
-				       primStream* pStream);
-		    
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc b/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc
deleted file mode 100644
index 2e70f839363..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc
+++ /dev/null
@@ -1,844 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "zlassert.h"
-#include "sampleCompBot.h"
-#include "sampleCompRight.h"
-
-#define max(a,b) ((a>b)? a:b)
-
-//return: index_mono, index_pass
-//from [pass, mono] is strictly U-monotone
-//from [corner, pass] is <u
-// vertex[pass][0] >= u
-//if everybost is <u, then pass = end+1.
-//otherwise both mono and pass are meanng full and we have corner<=pass<=mono<=end
-void findBotLeftSegment(vertexArray* leftChain, 
-			Int leftEnd,
-			Int leftCorner,
-			Real u,
-			Int& ret_index_mono,
-			Int& ret_index_pass)
-{
-  Int i;
-
-  assert(leftCorner <= leftEnd);
-  for(i=leftCorner; i<= leftEnd; i++)
-    if(leftChain->getVertex(i)[0] >= u)
-      break;
-  ret_index_pass = i;
-  if(ret_index_pass <= leftEnd)
-    {
-      for(i=ret_index_pass; i< leftEnd; i++)
-	{
-	  if(leftChain->getVertex(i+1)[0] <= leftChain->getVertex(i)[0])
-	    break;
-	}
-      ret_index_mono = i;
-    }
-
-}
-
-void findBotRightSegment(vertexArray* rightChain, 
-			 Int rightEnd,
-			 Int rightCorner,
-			 Real u,
-			 Int& ret_index_mono,
-			 Int& ret_index_pass)
-{
-  Int i;
-  assert(rightCorner <= rightEnd);
-  for(i=rightCorner; i<= rightEnd; i++)
-    if(rightChain->getVertex(i)[0] <= u)
-      break;
-
-
-
-  ret_index_pass = i;
-
-  if(ret_index_pass <= rightEnd)
-    {
-      for(i=ret_index_pass; i< rightEnd; i++)
-	{
-	  if(rightChain->getVertex(i+1)[0] >= rightChain->getVertex(i)[0])
-	    break;
-	}
-      ret_index_mono = i;
-    }
-}
-
-
-void sampleBotRightWithGridLinePost(Real* botVertex,
-				    vertexArray* rightChain,
-				    Int rightEnd,
-				    Int segIndexMono,
-				    Int segIndexPass,
-				    Int rightCorner,
-				    gridWrap* grid,
-				    Int gridV,
-				    Int leftU,
-				    Int rightU,
-				    primStream* pStream)
-{
-  //the possible section which is to the right of rightU
-  if(segIndexPass > rightCorner) //from corner to pass-1 is > u.
-    {
-      Real *tempBot;
-      if(segIndexPass <= rightEnd) //there is a point to the left of u
-	tempBot = rightChain->getVertex(segIndexPass);
-      else   //nothing is to the left of u.
-	tempBot = botVertex; 
-      Real tempTop[2];
-      tempTop[0] = grid->get_u_value(rightU);
-      tempTop[1] = grid->get_v_value(gridV);
-      
-      monoTriangulation2(tempTop, tempBot,
-			 rightChain,
-			 rightCorner,
-			 segIndexPass-1,
-			 0, // a decrease chain
-			 pStream);
-    }
-
-  //the possible section which is strictly Umonotone
-  if(segIndexPass <= rightEnd) //segIndex pass and mono exist
-    {
-      //if there are grid points which are to the left of botVertex
-      //then we should use botVertex to form a fan with these points to
-      //optimize the triangulation
-      int do_optimize = 1;
-      if(botVertex[0] <= grid->get_u_value(leftU))
-	do_optimize = 0;
-      else
-	{
-	  //we also have to make sure that botVertex is the left most vertex on the chain
-	  int i;
-	  for(i=segIndexMono; i<=rightEnd; i++)
-	    if(rightChain->getVertex(i)[0] <= botVertex[0])
-	      {
-		do_optimize = 0;
-		break;
-	      }
-	}
-
-      if(do_optimize)
-	{
-	  //find midU so that grid->get_u_value(midU) <= botVertex[0]
-	  //and               grid->get_u_value(midU) >  botVertex[0]
-	  int midU = leftU;
-	  while(grid->get_u_value(midU) <= botVertex[0])
-	    {
-	      midU++;
-	      if(midU > rightU)
-		break;
-	    }
-	  midU--;
-
-	  grid->outputFanWithPoint(gridV, leftU, midU, botVertex, pStream);
-	  stripOfFanRight(rightChain, segIndexMono, segIndexPass, grid, gridV, midU, rightU, pStream, 1);	  
-	  Real tempTop[2];
-	  tempTop[0] = grid->get_u_value(midU);
-	  tempTop[1] = grid->get_v_value(gridV);
-	  monoTriangulation2(tempTop, botVertex, rightChain, segIndexMono, rightEnd, 0, pStream);
-	}
-      else //not optimize
-	{
-	  stripOfFanRight(rightChain, segIndexMono, segIndexPass, grid, gridV, leftU, rightU, pStream, 1);
-	  Real tempTop[2];
-	  tempTop[0] = grid->get_u_value(leftU);
-	  tempTop[1] = grid->get_v_value(gridV);
-	  monoTriangulation2(tempTop, botVertex, rightChain, segIndexMono, rightEnd, 0, pStream);
-	}
-    }
-  else //the botVertex forms a fan witht eh grid points
-    grid->outputFanWithPoint(gridV, leftU, rightU, botVertex, pStream);
-}
-      
-void sampleBotRightWithGridLine(Real* botVertex, 
-				vertexArray* rightChain,
-				Int rightEnd,
-				Int rightCorner,
-				gridWrap* grid,
-				Int gridV,
-				Int leftU,
-				Int rightU,
-				primStream* pStream)
-{
-  //if right chaain is empty, then there is only one bot vertex with
-  //one grid line
-  if(rightEnd<rightCorner){
-    grid->outputFanWithPoint(gridV, leftU, rightU, botVertex, pStream);
-    return;
-  }
-
-  Int segIndexMono = 0, segIndexPass;
-  findBotRightSegment(rightChain,
-		      rightEnd,
-		      rightCorner,
-		      grid->get_u_value(rightU),
-		      segIndexMono,
-		      segIndexPass);
-
-  sampleBotRightWithGridLinePost(botVertex, 
-				 rightChain,
-				 rightEnd,
-				 segIndexMono,
-				 segIndexPass,
-				 rightCorner,
-				 grid,
-				 gridV,
-				 leftU,
-				 rightU,
-				 pStream);
-}
-  
- 
-void sampleBotLeftWithGridLinePost(Real* botVertex,
-				   vertexArray* leftChain,
-				   Int leftEnd,
-				   Int segIndexMono,
-				   Int segIndexPass,
-				   Int leftCorner,
-				   gridWrap* grid,
-				   Int gridV,
-				   Int leftU, 
-				   Int rightU,
-				   primStream* pStream)
-{
-
-  //the possible section which is to the left of leftU
-  if(segIndexPass > leftCorner) //at least leftCorner is to the left of leftU
-    {
-      Real *tempBot; 
-      if(segIndexPass <= leftEnd) //from corner to pass-1 is <u
-	tempBot = leftChain->getVertex(segIndexPass);
-      else //nothing is to the rigth of u
-	tempBot = botVertex;
-      Real tempTop[2];
-      tempTop[0] = grid->get_u_value(leftU);
-      tempTop[1] = grid->get_v_value(gridV);
-      monoTriangulation2(tempTop, tempBot, leftChain, leftCorner, segIndexPass-1,
-			 1, //a increase chain,
-			 pStream);
-    }
-  //the possible section which is strictly Umonotone
-  if(segIndexPass <= leftEnd) //segIndexpass and mono exist
-    {
-      stripOfFanLeft(leftChain, segIndexMono, segIndexPass, grid, gridV, leftU, rightU, pStream, 1);
-      Real tempTop[2];
-      tempTop[0] = grid->get_u_value(rightU);
-      tempTop[1] = grid->get_v_value(gridV);
-
-      monoTriangulation2(tempTop, botVertex, leftChain, segIndexMono, leftEnd, 
-			 1,  //increase chain
-			 pStream);
-    }
-  else //the botVertex forms a fan with the grid points
-    {
-      grid->outputFanWithPoint(gridV, leftU, rightU, botVertex, pStream);
-    }
-
-}
-
-void sampleBotLeftWithGridLine(Real* botVertex,
-			       vertexArray* leftChain,
-			       Int leftEnd,
-			       Int leftCorner,
-			       gridWrap* grid,
-			       Int gridV,
-			       Int leftU,
-			       Int rightU,
-			       primStream* pStream)
-{
-
-  //if leftChain is empty, then there is only one botVertex with one grid line
-  if(leftEnd< leftCorner){
-    grid->outputFanWithPoint(gridV, leftU, rightU, botVertex, pStream);
-    return;
-  }
-
-  Int segIndexPass, segIndexMono = 0;
-  findBotLeftSegment(leftChain, leftEnd, leftCorner, grid->get_u_value(leftU), segIndexMono, segIndexPass);
-
-  sampleBotLeftWithGridLinePost(botVertex,
-			    leftChain,
-			    leftEnd,
-			    segIndexMono,
-			    segIndexPass,
-			    leftCorner,
-			    grid,
-			    gridV,
-			    leftU, rightU, pStream);
-}
-
-//return 1 if separator exists, 0 otherwise
-Int findBotSeparator(vertexArray* leftChain,
-		     Int leftEnd,
-		     Int leftCorner,
-		     vertexArray* rightChain,
-		     Int rightEnd,
-		     Int rightCorner,
-		     Int& ret_sep_left,
-		     Int& ret_sep_right)
-{
-  Int oldLeftI, oldRightI, newLeftI, newRightI;
-  Int i,j,k;
-  Real leftMax /*= leftChain->getVertex(leftCorner)[0]*/;
-  Real rightMin /*= rightChain->getVertex(rightCorner)[0]*/;
-  if(leftChain->getVertex(leftCorner)[1] < rightChain->getVertex(rightCorner)[1])//leftlower
-    {
-      oldLeftI = leftCorner-1;
-      oldRightI = rightCorner;
-      leftMax = leftChain->getVertex(leftCorner)[0] - Real(1.0) ; //initilize to be left of leftCorner
-      rightMin = rightChain->getVertex(rightCorner)[0]; 
-    }
-  else //rightlower
-    {
-      oldLeftI = leftCorner;
-      oldRightI = rightCorner-1;
-      leftMax = leftChain->getVertex(leftCorner)[0];
-      rightMin = rightChain->getVertex(rightCorner)[0] + Real(1.0);
-    }
-
-  //i: the current working leftChain Index
-  //j: the curent working right chian index
-  //if(left(i) is lower than right(j), then the two chains above right(j) are separated.
-  //else the two chains below left(i) are separated.
-  i = leftCorner;
-  j = rightCorner;
-  while(1)
-    {
-      newLeftI = oldLeftI;
-      newRightI = oldRightI;
-      if(i> leftEnd) //left chain is doen , go through remaining right chain
-	{
-	  for(k=j+1; k<= rightEnd; k++)
-	    {
-	      if(rightChain->getVertex(k)[0] > leftMax) //no conflict
-		{
-		  //update oldRightI if necessary
-		  if(rightChain->getVertex(k)[0] < rightMin)
-		    {
-		      rightMin = rightChain->getVertex(k)[0];
-		      oldRightI = k;
-		    }
-		}
-	      else //there is a conflict
-		break; //the for-loop, above right(k+1) is separated: oldLeftI, oldRightI
-	    }
-	  break; //the while loop
-	}
-      else if(j > rightEnd) //right Chain is doen
-	{
-	  for(k=i+1; k<= leftEnd; k++)
-	    {
-	      if(leftChain->getVertex(k)[0] < rightMin) //no conflict
-		{
-		  //update oldLeftI if necessary
-		  if(leftChain->getVertex(k)[0] > leftMax)
-		    {
-		      leftMax =  leftChain->getVertex(k)[0];
-		      oldLeftI = k;
-		    }
-		}
-	      else //there is a conflict
-		break; //the for-loop, above left(k+1) is separated: oldLeftI, oldRightI
-	    }
-	  break; //the while loop
-	}
-      else if(leftChain->getVertex(i)[1] < rightChain->getVertex(j)[1]) //left lower
-	{
-
-	  if(leftChain->getVertex(i)[0] > leftMax) //update leftMax amd newLeftI
-	    {
-	      leftMax = leftChain->getVertex(i)[0];
-	      newLeftI = i;
-	    }
-	  for(k=j+1; k<= rightEnd; k++) //update rightMin and newRightI;
-	    {
-	      if(rightChain->getVertex(k)[1] < leftChain->getVertex(i)[1]) //right gets lower
-		break;
-	      if(rightChain->getVertex(k)[0] < rightMin)
-		{
-		  rightMin = rightChain->getVertex(k)[0];
-		  newRightI = k;
-		}
-	    }
-	  j = k; //next working j, since j will he lower than i in next loop
-	  if(leftMax >= rightMin) //there is a conflict
-	    break;
-	  else //still no conflict
-	    {
-	      oldLeftI = newLeftI;
-	      oldRightI = newRightI;
-
-	    }
-	}
-      else //right lower
-	{
-	  if(rightChain->getVertex(j)[0] < rightMin)
-	    {
-	      rightMin = rightChain->getVertex(j)[0];
-	      newRightI = j;
-	    }
-	  for(k=i+1; k<= leftEnd; k++)
-	    {
-	      if(leftChain->getVertex(k)[1] < rightChain->getVertex(j)[1])
-		break;
-	      if(leftChain->getVertex(k)[0] > leftMax)
-		{
-		  leftMax = leftChain->getVertex(k)[0];
-		  newLeftI = k;
-		}
-	    }
-	  i=k; //nexct working i, since i will be lower than j next loop
-	  if(leftMax >= rightMin) //there is conflict
-	    break;
-	  else //still no conflict
-	    {
-	      oldLeftI = newLeftI;
-	      oldRightI = newRightI;
-	    }
-	}
-    }//end of while loop
-  //now oldLeftI and oldRight I are the desired separator index notice that they are not 
-  //necessarily valid 
-  if(oldLeftI < leftCorner || oldRightI < rightCorner)
-    return 0; //no separator
-  else
-    {
-      ret_sep_left = oldLeftI;
-      ret_sep_right = oldRightI;
-      return 1;
-    }
-}
-
-void sampleCompBot(Real* botVertex,
-		   vertexArray* leftChain,
-		   Int leftEnd,
-		   vertexArray* rightChain,
-		   Int rightEnd,
-		   gridBoundaryChain* leftGridChain,
-		   gridBoundaryChain* rightGridChain,
-		   Int gridIndex,
-		   Int down_leftCornerWhere,
-		   Int down_leftCornerIndex,
-		   Int down_rightCornerWhere,
-		   Int down_rightCornerIndex,
-		   primStream* pStream)
-{
-
-  if(down_leftCornerWhere == 1 && down_rightCornerWhere == 1) //the bot is botVertex with possible grid points
-    {
-
-      leftGridChain->getGrid()->outputFanWithPoint(leftGridChain->getVlineIndex(gridIndex),
-						   leftGridChain->getUlineIndex(gridIndex),
-						  rightGridChain->getUlineIndex(gridIndex),
-						   botVertex,
-						   pStream);
-      return;
-    }
-  else if(down_leftCornerWhere != 0)
-    {
-
-      Real* tempBot;
-      Int tempRightEnd;
-      if(down_leftCornerWhere == 1){
-	tempRightEnd = rightEnd;
-	tempBot = botVertex;
-      }
-      else
-	{
-	  tempRightEnd = down_leftCornerIndex-1;
-	  tempBot = rightChain->getVertex(down_leftCornerIndex);
-	}
-
-      sampleBotRightWithGridLine(tempBot,
-				 rightChain, 
-				 tempRightEnd,
-				 down_rightCornerIndex,
-				 rightGridChain->getGrid(),
-				 leftGridChain->getVlineIndex(gridIndex),
-				 leftGridChain->getUlineIndex(gridIndex),
-				 rightGridChain->getUlineIndex(gridIndex),
-				 pStream);
-    }
-  else if(down_rightCornerWhere != 2)
-    {
-
-      Real* tempBot;
-      Int tempLeftEnd;
-      if(down_rightCornerWhere == 1){
-	tempLeftEnd = leftEnd;
-	tempBot = botVertex;
-      }
-      else //right corner is on left chain
-	{
-	  tempLeftEnd = down_rightCornerIndex-1;
-	  tempBot = leftChain->getVertex(down_rightCornerIndex);	  
-	}
-
-
-      sampleBotLeftWithGridLine(tempBot, leftChain, tempLeftEnd, down_leftCornerIndex, 
-				leftGridChain->getGrid(),
-				leftGridChain->getVlineIndex(gridIndex),
-				leftGridChain->getUlineIndex(gridIndex),
-				rightGridChain->getUlineIndex(gridIndex),
-				pStream);
-
-    }
-  else //down_leftCornereWhere == 0, down_rightCornerwhere == 2
-    {
-      sampleCompBotSimple(botVertex, 
-			  leftChain,
-			  leftEnd,
-			  rightChain,
-			  rightEnd,
-			  leftGridChain,
-			  rightGridChain,
-			  gridIndex,
-			  down_leftCornerWhere,
-			  down_leftCornerIndex,
-			  down_rightCornerWhere,
-			  down_rightCornerIndex,
-			  pStream);
-      
-      return;
-
-#ifdef NOT_REACHABLE
-      //the following code is trying to do some optimization, but not quite working. so it is not reachable, but leave it here for reference
-      Int sep_left, sep_right;
-      if(findBotSeparator(leftChain, leftEnd, down_leftCornerIndex,
-			  rightChain, rightEnd, down_rightCornerIndex,
-			  sep_left, sep_right)
-	 )//separator exiosts
-	{
-
-	  if(leftChain->getVertex(sep_left)[0] >= leftGridChain->get_u_value(gridIndex) &&
-	     rightChain->getVertex(sep_right)[0] <= rightGridChain->get_u_value(gridIndex))
-	    {
-	      Int gridSep;
-	      Int segLeftMono, segLeftPass, segRightMono, segRightPass;
-	      findBotLeftSegment(leftChain,
-				 sep_left,
-				 down_leftCornerIndex,
-				 leftGridChain->get_u_value(gridIndex),
-				 segLeftMono,
-				 segLeftPass);
-	      findBotRightSegment(rightChain,
-				  sep_right,
-				  down_rightCornerIndex,
-				  rightGridChain->get_u_value(gridIndex),
-				  segRightMono,
-				  segRightPass);
-	      if(leftChain->getVertex(segLeftMono)[1] <= rightChain->getVertex(segRightMono)[1])
-		{
-		  gridSep = rightGridChain->getUlineIndex(gridIndex);
-		  while(leftGridChain->getGrid()->get_u_value(gridSep) > leftChain->getVertex(segLeftMono)[0])
-		    gridSep--;
-		}
-	      else 
-		{
-		  gridSep = leftGridChain->getUlineIndex(gridIndex);
-		  while(leftGridChain->getGrid()->get_u_value(gridSep) < rightChain->getVertex(segRightMono)[0])
-		    gridSep++;
-		}
-
-	      sampleBotLeftWithGridLinePost(leftChain->getVertex(segLeftMono),
-					    leftChain,
-					    segLeftMono-1,
-					    segLeftMono-1,
-					    segLeftPass,
-					    down_leftCornerIndex,
-					    leftGridChain->getGrid(),
-					    leftGridChain->getVlineIndex(gridIndex),
-					    leftGridChain->getUlineIndex(gridIndex),
-					    gridSep,
-					    pStream);
-	      sampleBotRightWithGridLinePost(rightChain->getVertex(segRightMono),
-					     rightChain,
-					     segRightMono-1,
-					     segRightMono-1,
-					     segRightPass,
-					     down_rightCornerIndex,
-					     rightGridChain->getGrid(),
-					     rightGridChain->getVlineIndex(gridIndex),
-					     gridSep,
-					     rightGridChain->getUlineIndex(gridIndex),
-					     pStream);
-	      Real tempTop[2];
-	      tempTop[0] = leftGridChain->getGrid()->get_u_value(gridSep);
-	      tempTop[1] = leftGridChain->get_v_value(gridIndex);
-	      monoTriangulationRecGen(tempTop, botVertex,
-				      leftChain, segLeftMono, leftEnd,
-				      rightChain, segRightMono, rightEnd,
-				      pStream);
-	    }//end if both sides have vertices inside the gridboundary points
-	  else if(leftChain->getVertex(sep_left)[0] >= leftGridChain->get_u_value(gridIndex)) //left n right out
-	    
-	    {
-	      Int segLeftMono, segLeftPass;
-	      findBotLeftSegment(leftChain,
-				 sep_left,
-				 down_leftCornerIndex,
-				 leftGridChain->get_u_value(gridIndex),
-				 segLeftMono,
-				 segLeftPass);				 
-              assert(segLeftPass <= sep_left); //make sure there is a point to the right of u.
-              monoTriangulation2(leftGridChain->get_vertex(gridIndex),
-				 leftChain->getVertex(segLeftPass),
-				 leftChain,
-				 down_leftCornerIndex,
-				 segLeftPass-1,
-				 1, //a increase chain
-				 pStream);
-              stripOfFanLeft(leftChain, segLeftMono, segLeftPass, 
-			     leftGridChain->getGrid(),
-			     leftGridChain->getVlineIndex(gridIndex),
-			     leftGridChain->getUlineIndex(gridIndex),
-			     rightGridChain->getUlineIndex(gridIndex),
-			     pStream,1 );
-/*
-	      sampleBotLeftWithGridLinePost(leftChain->getVertex(segLeftMono),
-					    leftChain,
-					    segLeftMono-1,
-					    segLeftMono-1,
-					    segLeftPass,
-					    down_leftCornerIndex,
-					    leftGridChain->getGrid(),
-					    leftGridChain->getVlineIndex(gridIndex),
-					    leftGridChain->getUlineIndex(gridIndex),
-					    rightGridChain->getUlineIndex(gridIndex),
-					    pStream);					    
-*/
-	      
-	      monoTriangulationRecGen(rightGridChain->get_vertex(gridIndex),
-				      botVertex,
-				      leftChain, segLeftMono, leftEnd,
-				      rightChain, down_rightCornerIndex, rightEnd,
-				      pStream);
-	    }//end left in right out
-	  else if(rightChain->getVertex(sep_right)[0] <= rightGridChain->get_u_value(gridIndex))//left out right in
-	    {	      
-	      Int segRightMono, segRightPass;
-	      findBotRightSegment(rightChain, sep_right, down_rightCornerIndex,
-				  rightGridChain->get_u_value(gridIndex),
-				  segRightMono,
-				  segRightPass);
-
-              assert(segRightPass <= sep_right); //make sure there is a point to the left of u.
-              monoTriangulation2(rightGridChain->get_vertex(gridIndex),
-				 rightChain->getVertex(segRightPass),
-				 rightChain,
-				 down_rightCornerIndex,
-				 segRightPass-1,
-				 0, // a decrease chain
-				 pStream);
-
-              stripOfFanRight(rightChain, segRightMono, segRightPass, 
-			      rightGridChain->getGrid(),
-			      rightGridChain->getVlineIndex(gridIndex),
-			      leftGridChain->getUlineIndex(gridIndex),
-			      rightGridChain->getUlineIndex(gridIndex),     
-			      pStream, 1);
-
-
-	      monoTriangulationRecGen(leftGridChain->get_vertex(gridIndex),
-				      botVertex,
-				      leftChain, down_leftCornerIndex, leftEnd,
-				      rightChain, segRightMono, rightEnd,
-				      pStream);	    	
-
-	    }//end left out right in
-	  else //left out, right out
-	    {
-	      sampleCompBotSimple(botVertex, 
-				 leftChain,
-				 leftEnd,
-				 rightChain,
-				 rightEnd,
-				 leftGridChain,
-				 rightGridChain,
-				 gridIndex,
-				 down_leftCornerWhere,
-				 down_leftCornerIndex,
-				 down_rightCornerWhere,
-				 down_rightCornerIndex,
-				 pStream);
-	    
-	    }//end leftout right out
-	}//end if separator exists
-      else //no separator
-	{
-
-	  sampleCompBotSimple(botVertex, 
-			     leftChain,
-			     leftEnd,
-			     rightChain,
-			     rightEnd,
-			     leftGridChain,
-			     rightGridChain,
-			     gridIndex,
-			     down_leftCornerWhere,
-			     down_leftCornerIndex,
-			     down_rightCornerWhere,
-			     down_rightCornerIndex,
-			     pStream);
-	}
-#endif
-    }//end id 0 2
-}//end if the functin
-
-				 
-void sampleCompBotSimple(Real* botVertex,
-		   vertexArray* leftChain,
-		   Int leftEnd,
-		   vertexArray* rightChain,
-		   Int rightEnd,
-		   gridBoundaryChain* leftGridChain,
-		   gridBoundaryChain* rightGridChain,
-		   Int gridIndex,
-		   Int down_leftCornerWhere,
-		   Int down_leftCornerIndex,
-		   Int down_rightCornerWhere,
-		   Int down_rightCornerIndex,
-		   primStream* pStream)  
-{
-  //the plan is to use monotriangulation algorithm.
-  Int i,k;
-  Real* ActualTop;
-  Real* ActualBot;
-  Int ActualLeftStart, ActualLeftEnd;
-  Int ActualRightStart, ActualRightEnd;
-  
-  //creat an array to store the points on the grid line
-  gridWrap* grid = leftGridChain->getGrid();
-  Int gridV = leftGridChain->getVlineIndex(gridIndex);
-  Int gridLeftU = leftGridChain->getUlineIndex(gridIndex);
-  Int gridRightU = rightGridChain->getUlineIndex(gridIndex);
-  Real2* gridPoints = (Real2*) malloc(sizeof(Real2) * (gridRightU - gridLeftU +1));
-  assert(gridPoints);
-
-  for(k=0, i=gridRightU; i>= gridLeftU; i--, k++)
-    {
-      gridPoints[k][0] = grid->get_u_value(i);
-      gridPoints[k][1] = grid->get_v_value(gridV);
-    }
-
-  if(down_rightCornerWhere != 0) //rightCorner is not on lef
-    ActualLeftEnd = leftEnd;
-  else
-    ActualLeftEnd = down_rightCornerIndex-1; //down_rightCornerIndex will be th actualBot
-  
-  if(down_leftCornerWhere != 0) //left corner is not on let chian
-    ActualLeftStart = leftEnd+1; //meaning that there is no actual left section
-  else
-    ActualLeftStart = down_leftCornerIndex;
-  
-  vertexArray ActualLeftChain(max(0, ActualLeftEnd - ActualLeftStart +1) + gridRightU - gridLeftU +1);
-  
-  for(i=0; i<gridRightU - gridLeftU +1 ; i++)
-    ActualLeftChain.appendVertex(gridPoints[i]);
-  for(i=ActualLeftStart; i<= ActualLeftEnd; i++)
-    ActualLeftChain.appendVertex(leftChain->getVertex(i));
-  
-  //determine ActualRightStart
-  if(down_rightCornerWhere != 2) //right is not on right
-    ActualRightStart = rightEnd +1; //meaning no section on right
-  else
-    ActualRightStart = down_rightCornerIndex;
-  
-  //determine actualrightEnd
-  if(down_leftCornerWhere != 2) //left is not on right
-    {
-
-      ActualRightEnd = rightEnd;
-    }
-  else //left corner is on right 
-    {
-      ActualRightEnd = down_leftCornerIndex-1; //down_leftCornerIndex will be the bot
-
-    }
-
-  //actual bot
-  if(down_rightCornerWhere == 2) 
-    {
-      if(down_leftCornerWhere == 2)
-	ActualBot = rightChain->getVertex(down_leftCornerIndex);
-      else
-	ActualBot = botVertex;
-    }
-  else if(down_rightCornerWhere == 1) //right corner bot
-    ActualBot = botVertex;
-  else //down_rightCornerWhere == 0
-    ActualBot = leftChain->getVertex(down_rightCornerIndex);
-  
-  ActualTop = gridPoints[0];
-/*
-printf("in bot simple, actual leftChain is \n");
-ActualLeftChain.print();
-printf("Actual Top = %f,%f\n", ActualTop[0],ActualTop[1]);
-printf("Actual Bot = %f,%f\n", ActualBot[0],ActualBot[1]);
-printf("Actual right start = %i, end=%i\n",ActualRightStart,   ActualRightEnd);
-*/
-  if(rightChain->getVertex(ActualRightStart)[1] == ActualTop[1])
-    monoTriangulationRecGenOpt(rightChain->getVertex(ActualRightStart),
-			    ActualBot,
-			    &ActualLeftChain,
-			    0, 
-			    ActualLeftChain.getNumElements()-1,
-			    rightChain,
-			    ActualRightStart+1,
-			    ActualRightEnd,
-			    pStream);
-  else
-    monoTriangulationRecGenOpt(ActualTop, ActualBot, 
-			  &ActualLeftChain,
-			  1, //the first one is the top vertex
-			  ActualLeftChain.getNumElements()-1,
-			  rightChain,
-			  ActualRightStart,
-			  ActualRightEnd,
-			  pStream);
-  free(gridPoints);
-}
-  
-  
-				 
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h b/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h
deleted file mode 100644
index 7b982794c04..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _SAMPLECOMPBOT_H
-#define _SAMPLECOMPBOT_H
-
-#include "sampleMonoPoly.h"
-
-void findBotLeftSegment(vertexArray* leftChain, 
-			Int leftEnd,
-			Int leftCorner,
-			Real u,
-			Int& ret_index_mono,
-			Int& ret_index_pass);
-
-void findBotRightSegment(vertexArray* rightChain, 
-			 Int rightEnd,
-			 Int rightCorner,
-			 Real u,
-			 Int& ret_index_mono,
-			 Int& ret_index_pass);
-
-
-void sampleBotRightWithGridLinePost(Real* botVertex,
-				    vertexArray* rightChain,
-				    Int rightEnd,
-				    Int segIndexMono,
-				    Int segIndexPass,
-				    Int rightCorner,
-				    gridWrap* grid,
-				    Int gridV,
-				    Int leftU,
-				    Int rightU,
-				    primStream* pStream);
-
-
-void sampleBotRightWithGridLine(Real* botVertex, 
-				vertexArray* rightChain,
-				Int rightEnd,
-				Int rightCorner,
-				gridWrap* grid,
-				Int gridV,
-				Int leftU,
-				Int rightU,
-				primStream* pStream);
-
-
-void sampleBotLeftWithGridLinePost(Real* botVertex,
-				   vertexArray* leftChain,
-				   Int leftEnd,
-				   Int segIndexMono,
-				   Int segIndexPass,
-				   Int leftCorner,
-				   gridWrap* grid,
-				   Int gridV,
-				   Int leftU, 
-				   Int rightU,
-				   primStream* pStream);
-
-
-void sampleBotLeftWithGridLine(Real* botVertex,
-			       vertexArray* leftChain,
-			       Int leftEnd,
-			       Int leftCorner,
-			       gridWrap* grid,
-			       Int gridV,
-			       Int leftU,
-			       Int rightU,
-			       primStream* pStream);
-
-
-Int findBotSeparator(vertexArray* leftChain,
-		     Int leftEnd,
-		     Int leftCorner,
-		     vertexArray* rightChain,
-		     Int rightEnd,
-		     Int rightCorner,
-		     Int& ret_sep_left,
-		     Int& ret_sep_right);
-
-void sampleCompBot(Real* botVertex,
-		   vertexArray* leftChain,
-		   Int leftEnd,
-		   vertexArray* rightChain,
-		   Int rightEnd,
-		   gridBoundaryChain* leftGridChain,
-		   gridBoundaryChain* rightGridChain,
-		   Int gridIndex,
-		   Int down_leftCornerWhere,
-		   Int down_leftCornerIndex,
-		   Int down_rightCornerWhere,
-		   Int down_rightCornerIndex,
-		   primStream* pStream);
-
-void sampleCompBotSimple(Real* botVertex,
-		   vertexArray* leftChain,
-		   Int leftEnd,
-		   vertexArray* rightChain,
-		   Int rightEnd,
-		   gridBoundaryChain* leftGridChain,
-		   gridBoundaryChain* rightGridChain,
-		   Int gridIndex,
-		   Int down_leftCornerWhere,
-		   Int down_leftCornerIndex,
-		   Int down_rightCornerWhere,
-		   Int down_rightCornerIndex,
-		   primStream* pStream);
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc b/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc
deleted file mode 100644
index d01e50018bf..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc
+++ /dev/null
@@ -1,644 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "gluos.h"
-#include "glimports.h"
-#include "zlassert.h"
-#include "sampleCompRight.h"
-
-#define max(a,b) ((a>b)? a:b)
-#define min(a,b) ((a>b)? b:a)
-
-
-
-#ifdef NOT_TAKEOUT
-
-/*notice that we need leftChain because the 
- *corners could be on the leftChain.
- */
-void sampleCompRight(Real* topVertex, Real* botVertex,
-		    vertexArray* leftChain,
-		    Int leftStartIndex, Int leftEndIndex,
-		    vertexArray* rightChain,
-		    Int rightStartIndex, Int rightEndIndex,
-		    gridBoundaryChain* rightGridChain,
-		    Int gridIndex1, Int gridIndex2,
-		    Int up_rightCornerWhere,
-		    Int up_rightCornerIndex,
-		    Int down_rightCornerWhere,
-		    Int down_rightCornerIndex,
-		    primStream* pStream)
-{
-  /*find out whether there is a trim vertex  which is
-   *inbetween the top and bot grid lines or not.
-   */
-  Int midIndex1;
-  Int midIndex2;
-  Int gridMidIndex1 = 0, gridMidIndex2 = 0;
-  //midIndex1: array[i] <= v, array[i+1] > v
-  //midIndex2: array[i] >= v,  array[i+1] < v
-  midIndex1 = rightChain->findIndexBelowGen(rightGridChain->get_v_value(gridIndex1),
-					    rightStartIndex,
-					    rightEndIndex);
-  midIndex2 = -1; //initilization
-  if(midIndex1 <= rightEndIndex && gridIndex1 < gridIndex2)
-    if(rightChain->getVertex(midIndex1)[1] >= rightGridChain->get_v_value(gridIndex2))
-      {
-	//midIndex2 must exist:
-	midIndex2 = rightChain->findIndexAboveGen(rightGridChain->get_v_value(gridIndex2),
-						  midIndex1, //midIndex1<=midIndex2
-						  rightEndIndex);
-	//find gridMidIndex1 so that either it=gridIndex1 when the gridline is 
-	// at the same height as trim vertex midIndex1, or it is the last one 
-	//which is strictly above midIndex1.
-	{
-	  Real temp = rightChain->getVertex(midIndex1)[1];
-	  if(rightGridChain->get_v_value(gridIndex1) == temp)
-	    gridMidIndex1 = gridIndex1;
-	  else
-	    {
-	    gridMidIndex1 = gridIndex1;
-	    while(rightGridChain->get_v_value(gridMidIndex1) > temp)
-	      gridMidIndex1++;
-	    gridMidIndex1--;
-	    }
-	}//end of find gridMindIndex1
-	//find gridMidIndex2 so that it is the (first one below or equal 
-	//midIndex) last one above or equal midIndex2
-	{
-	  Real temp = rightChain->getVertex(midIndex2)[1];
-	  for(gridMidIndex2 = gridMidIndex1+1; gridMidIndex2 <= gridIndex2; gridMidIndex2++)
-	    if(rightGridChain->get_v_value(gridMidIndex2) <= temp)
-	      break;
-
-	  assert(gridMidIndex2 <= gridIndex2);
-	}//end of find gridMidIndex2
-      }
-
-
-  
-  //to interprete the corner information
-  Real* cornerTop;
-  Real* cornerBot;
-  Int cornerRightStart;
-  Int cornerRightEnd;
-  Int cornerLeftUpEnd;
-  Int cornerLeftDownStart;
-  if(up_rightCornerWhere == 2) //right corner is on right chain
-    {
-      cornerTop = rightChain->getVertex(up_rightCornerIndex);
-      cornerRightStart = up_rightCornerIndex+1;
-      cornerLeftUpEnd = -1; //no left
-    }
-  else if(up_rightCornerWhere == 1) //right corner is on top
-    {
-      cornerTop = topVertex;
-      cornerRightStart = rightStartIndex;
-      cornerLeftUpEnd = -1; //no left
-    }
-  else //right corner is on left chain
-    {
-      cornerTop = topVertex;
-      cornerRightStart = rightStartIndex;
-      cornerLeftUpEnd = up_rightCornerIndex;
-    }
-  
-  if(down_rightCornerWhere == 2) //right corner is on right chan
-    {
-      cornerBot = rightChain->getVertex(down_rightCornerIndex);
-      cornerRightEnd = down_rightCornerIndex-1;
-      cornerLeftDownStart = leftEndIndex+1; //no left
-    }
-  else if (down_rightCornerWhere == 1) //right corner is at bot
-    {
-      cornerBot = botVertex;
-      cornerRightEnd = rightEndIndex;
-      cornerLeftDownStart = leftEndIndex+1; //no left     
-    }
-  else //right corner is on the left chain
-    {
-      cornerBot = botVertex;
-      cornerRightEnd = rightEndIndex;
-      cornerLeftDownStart = down_rightCornerIndex;
-    }
-
-  //sample
-  if(midIndex2 >= 0) //there is a trm point between grid lines
-    {
-
-      sampleRightSingleTrimEdgeRegionGen(cornerTop, rightChain->getVertex(midIndex1),
-					 rightChain,
-					 cornerRightStart,
-					 midIndex1-1,
-					 rightGridChain,
-					 gridIndex1,
-					 gridMidIndex1,
-					 leftChain,
-					 leftStartIndex,
-					 cornerLeftUpEnd,
-					 0, //no left down section,
-					 -1,
-					 pStream);
-
-      sampleRightSingleTrimEdgeRegionGen(rightChain->getVertex(midIndex2),
-					 cornerBot,
-					 rightChain,
-					 midIndex2+1,
-					 cornerRightEnd,
-					 rightGridChain,
-					 gridMidIndex2,
-					 gridIndex2,
-					 leftChain,
-					 0, //no left up section
-					 -1,
-					 cornerLeftDownStart,
-					 leftEndIndex,
-					 pStream);
-
-      sampleRightStripRecF(rightChain,
-			   midIndex1,
-			   midIndex2,
-			   rightGridChain,
-			   gridMidIndex1,
-			   gridMidIndex2,
-			   pStream);
-
-    }
-  else
-    {
-      sampleRightSingleTrimEdgeRegionGen(cornerTop, cornerBot,
-					 rightChain,
-					 cornerRightStart,
-					 cornerRightEnd,
-					 rightGridChain,
-					 gridIndex1,
-					 gridIndex2,
-					 leftChain,
-					 leftStartIndex,
-					 cornerLeftUpEnd,
-					 cornerLeftDownStart,
-					 leftEndIndex,
-					 pStream);
-    }
-}
-
-void sampleRightSingleTrimEdgeRegionGen(Real topVertex[2], Real botVertex[2],
-					 vertexArray* rightChain,
-					 Int rightStart,
-					 Int rightEnd,
-					 gridBoundaryChain* gridChain,
-					 Int gridBeginIndex,
-					 Int gridEndIndex,
-					 vertexArray* leftChain,
-					 Int leftUpBegin,
-					 Int leftUpEnd,
-					 Int leftDownBegin,
-					 Int leftDownEnd,
-					 primStream* pStream)
-{
-  Int i,k;
-   /*creat an array to store all the up and down secments of the left chain,
-   *and the right end grid points
-   *
-   *although vertex array is a dynamic array, but to gain efficiency,
-   *it is better to initiliza the exact array size
-   */
-  vertexArray vArray(gridEndIndex-gridBeginIndex+1 +
-		     max(0,leftUpEnd - leftUpBegin+1)+
-		     max(0,leftDownEnd - leftDownBegin+1));
-  //append the vertices on the up section of the left chain
-  for(i=leftUpBegin; i<= leftUpEnd; i++)
-    vArray.appendVertex(leftChain->getVertex(i));
-  
-  //append the vertices of the right extremal grid points,
-  //and at the same time, perform triangulation for the stair cases
-  vArray.appendVertex(gridChain->get_vertex(gridBeginIndex));
-  
-  for(k=1, i=gridBeginIndex+1; i<= gridEndIndex; i++, k++)
-    {
-      vArray.appendVertex(gridChain->get_vertex(i));
-      
-      //output the fan of the grid points of the (i)th and (i-1)th grid line.
-      gridChain->rightEndFan(i, pStream);
-    }
-  
-  //append all the vertices on the down section of the left chain
-  for(i=leftDownBegin; i<= leftDownEnd; i++)
-    vArray.appendVertex(leftChain->getVertex(i));
-  monoTriangulationRecGen(topVertex, botVertex,
-			  &vArray, 0, vArray.getNumElements()-1,
-			  rightChain, rightStart, rightEnd,
-			  pStream);
-}
-  
-void sampleRightSingleTrimEdgeRegion(Real upperVert[2], Real lowerVert[2],
-				     gridBoundaryChain* gridChain,
-				     Int beginIndex,
-				     Int endIndex,
-				     primStream* pStream)
-{
-  Int i,k;
-  vertexArray vArray(endIndex-beginIndex+1);
-  vArray.appendVertex(gridChain->get_vertex(beginIndex));
-  for(k=1, i=beginIndex+1; i<= endIndex; i++, k++)
-    {
-      vArray.appendVertex(gridChain->get_vertex(i));
-      //output the fan of the grid points of the (i)_th and i-1th gridLine
-      gridChain->rightEndFan(i, pStream);
-    }
-  monoTriangulation2(upperVert, lowerVert, &vArray, 0, endIndex-beginIndex, 
-		     1, //increase chain (to the left)
-		     pStream);
-}
-		      
-
-/*the gridlines from rightGridChainStartIndex to 
- *rightGridChainEndIndex are assumed to form a 
- *connected componenet
- *the trm vertex of topRightIndex is assumed to be below
- *or equal the first gridLine, and the trm vertex of
- *botRightIndex is assumed to be above or equal the last gridline
- **there could be multipe trm vertices equal to the last gridline, but
- **only one could be equal to top gridline. shape: ____| (recall that
- **for left chain recF, we allow shape: |----
- *if botRightIndex<topRightIndex, then no connected componenet exists, and 
- *no triangles are generated.
- *Othewise, botRightIndex>= topRightIndex, there is at least one triangles to 
- *output
- */
-void sampleRightStripRecF(vertexArray* rightChain,
-		     Int topRightIndex,
-		     Int botRightIndex,
-		     gridBoundaryChain* rightGridChain,
-		     Int rightGridChainStartIndex,
-		     Int rightGridChainEndIndex,	
-		     primStream* pStream
-		     )
-{
-
-  //sstop conditionL: if topRightIndex > botRightIndex, then stop
-  if(topRightIndex > botRightIndex)
-    return;
-  
-  //if there is only one grid line, return
-  if(rightGridChainStartIndex >= rightGridChainEndIndex)
-    return;
-
-
-  assert(rightChain->getVertex(topRightIndex)[1] <= rightGridChain->get_v_value(rightGridChainStartIndex) &&
-	 rightChain->getVertex(botRightIndex)[1] >= rightGridChain->get_v_value(rightGridChainEndIndex));
-
-  //firstfind the first trim vertex which is strictly below the second top
-  //grid line: index1. 
-  Real secondGridChainV = rightGridChain->get_v_value(rightGridChainStartIndex+1);
-  Int index1 = topRightIndex;
-  while(rightChain->getVertex(index1)[1] >= secondGridChainV){
-    index1++;
-    if(index1 >  botRightIndex)
-      break;
-  }
-  //now rightChain->getVertex(index1-1)[1] >= secondGridChainV and
-  //rightChain->getVertex(index1)[1] < secondGridChainV and
-  //we should include index1-1 to perform a gridStep
-    index1--;
-
-  //now we have rightChain->getVertex(index1)[1] >= secondGridChainV, and
-  //rightChain->getVertex(index1+1)[1] < secondGridChainV
-  sampleRightOneGridStep(rightChain, topRightIndex, index1, rightGridChain, rightGridChainStartIndex, pStream);
-
-  //if rightChain->getVertex(index1)[1] ==secondGridChainV then we can 
-  //recurvesively to the rest
-  if(rightChain->getVertex(index1)[1] == secondGridChainV)
-    {
-
-      
-      sampleRightStripRecF(rightChain, index1, botRightIndex, rightGridChain, rightGridChainStartIndex+1, rightGridChainEndIndex, pStream);
-    }
-  else if(index1 < botRightIndex)
-    {
-      //otherwise, we have rightChain->getVertex(index1)[1] > secondV
-      //let the next trim vertex be nextTrimVertex, (which should be strictly
-      //below the second grid line). Find the last grid line index2 which is STRICTLY ABOVE
-      //nextTrimVertex.
-      //sample one trm edge region.
-      Real *uppervert, *lowervert;
-      uppervert = rightChain->getVertex(index1);
-      lowervert = rightChain->getVertex(index1+1); //okay since index1<botRightindex
-      Int index2 = rightGridChainStartIndex+1;
-      while(rightGridChain->get_v_value(index2) > lowervert[1])
-	{
-	  index2++;
-	  if(index2 > rightGridChainEndIndex)
-	    break;
-	}
-      index2--;
-      
-      sampleRightSingleTrimEdgeRegion(uppervert, lowervert, rightGridChain, rightGridChainStartIndex+1, index2, pStream);
-      
-      //recursion
-      sampleRightStripRecF(rightChain, index1+1, botRightIndex, rightGridChain, index2, rightGridChainEndIndex, pStream);
-    }
-}
-
-//the degenerate case of sampleRightOneGridStep
-void sampleRightOneGridStepNoMiddle(vertexArray* rightChain,
-				    Int beginRightIndex,
-				    Int endRightIndex,
-				    gridBoundaryChain* rightGridChain,
-				    Int rightGridChainStartIndex,
-				    primStream* pStream)
-{
-  /*since there is no middle, there is at most one point which is on the 
-   *second grid line, there could be multiple points on the first (top)
-   *grid line.
-   */
-  rightGridChain->rightEndFan(rightGridChainStartIndex+1, pStream);
-  monoTriangulation2(rightGridChain->get_vertex(rightGridChainStartIndex),
-		     rightGridChain->get_vertex(rightGridChainStartIndex+1),
-		     rightChain,
-		     beginRightIndex,
-		     endRightIndex,
-		     0, //decrease chain
-		     pStream);
-}
-
-//sampling the right area in between two grid lines
-//shape: _________|
-void sampleRightOneGridStep(vertexArray* rightChain, 
-			    Int beginRightIndex,
-			    Int endRightIndex,
-			    gridBoundaryChain* rightGridChain,
-			    Int rightGridChainStartIndex,
-			    primStream* pStream)
-{
-  if(checkMiddle(rightChain, beginRightIndex, endRightIndex,
-		 rightGridChain->get_v_value(rightGridChainStartIndex),
-		 rightGridChain->get_v_value(rightGridChainStartIndex+1))<0)
-    {
-      sampleRightOneGridStepNoMiddle(rightChain, beginRightIndex, endRightIndex, rightGridChain, rightGridChainStartIndex, pStream);
-      return;
-    }
-
-  //copy into a polygn
-  {
-    directedLine* poly = NULL;
-    sampledLine* sline;
-    directedLine* dline;
-    gridWrap* grid = rightGridChain->getGrid();
-    float vert1[2];
-    float vert2[2];
-    Int i;
-    
-    Int innerInd = rightGridChain->getInnerIndex(rightGridChainStartIndex+1);
-    Int upperInd = rightGridChain->getUlineIndex(rightGridChainStartIndex);
-    Int lowerInd = rightGridChain->getUlineIndex(rightGridChainStartIndex+1);
-    Real upperV = rightGridChain->get_v_value(rightGridChainStartIndex);
-    Real lowerV = rightGridChain->get_v_value(rightGridChainStartIndex+1);
-    
-    //the upper gridline
-    vert1[1]=vert2[1]=upperV;
-    for(i=upperInd;
-	i>innerInd;
-	i--)
-      {
-	vert1[0]=grid->get_u_value(i);
-	vert2[0]=grid->get_u_value(i-1);
-	sline = new sampledLine(vert1, vert2);
-	dline = new directedLine(INCREASING, sline);
-	if(poly == NULL)
-	  poly = dline;
-	else
-	  poly->insert(dline);
-      }
-    
-    //the vertical grid line segment
-    vert1[0]=vert2[0] = grid->get_u_value(innerInd);
-    vert1[1]=upperV;
-    vert2[1]=lowerV;
-    sline=new sampledLine(vert1, vert2);
-    dline=new directedLine(INCREASING, sline);
-    if(poly == NULL)
-      poly = dline;
-    else
-      poly->insert(dline);
-    
-    //the lower grid line
-    vert1[1]=vert2[1]=lowerV;
-    for(i=innerInd; i<lowerInd; i++)
-      {
-	vert1[0] = grid->get_u_value(i);
-	vert2[0] = grid->get_u_value(i+1);
-	sline = new sampledLine(vert1, vert2);
-	dline = new directedLine(INCREASING, sline);
-	poly->insert(dline);       
-      }
-
-    //the edge connecting lower grid to right chain
-    vert1[0]=grid->get_u_value(lowerInd);
-    sline = new sampledLine(vert1, rightChain->getVertex(endRightIndex));
-    dline = new directedLine(INCREASING, sline);
-    poly->insert(dline);
-    
-    
-    //the right Chain
-    for(i=endRightIndex; i>beginRightIndex; i--)
-      {
-	sline = new sampledLine(rightChain->getVertex(i), rightChain->getVertex(i-1));
-	dline = new directedLine(INCREASING, sline);
-	poly->insert(dline);
-      }
-
-    //the edge connecting right chain with upper grid
-    vert2[1]=upperV;
-    vert2[0]=grid->get_u_value(upperInd);
-    sline = new sampledLine(rightChain->getVertex(beginRightIndex), vert2);
-    dline = new directedLine(INCREASING, sline);
-    poly->insert(dline);    
-    monoTriangulationOpt(poly, pStream);
-    //clean up
-    poly->deleteSinglePolygonWithSline();
-
-    return;
-  }
-	   
-  //this following code cannot be reached, but leave it for debuggig purpose.
-  Int i;
-  //find the maximal U-monotone chain of beginRightIndex, beginRightIndex+1,...
-  i=beginRightIndex;
-  Real prevU = rightChain->getVertex(i)[0];
-  for(i=beginRightIndex+1; i<= endRightIndex; i++){
-    Real thisU = rightChain->getVertex(i)[0];
-    if(thisU < prevU)
-      prevU = thisU;
-    else
-      break;
-  }
-  //from beginRightIndex to i-1 is strictly U-monotne
-  //if(i-1==beginRightIndex and the vertex of rightchain is on the first 
-  //gridline, then we should use 2 vertices  on the right chain. Of we only 
-  //use one (begin), we would output degenrate triangles.
-  if(i-1 == beginRightIndex && rightChain->getVertex(beginRightIndex)[1] == rightGridChain->get_v_value(rightGridChainStartIndex))
-    i++;
-  
-  Int j = endRightIndex -1;
-  if(rightGridChain->getInnerIndex(rightGridChainStartIndex+1) < rightGridChain->getUlineIndex(rightGridChainStartIndex+1))
-    {
-      j = rightChain->findDecreaseChainFromEnd(i-1/*beginRightIndex*/, endRightIndex);
-      Int temp = endRightIndex;
-      //now from j+1 to end is strictly U-monotone.
-      //if j+1 is on the last grid line, then we wat to skip to the vertex   
-      //whcih is strictly above the second grid line. This vertex must exist 
-      //since there is a middle vertex
-      if(j+1 == endRightIndex)
-	{
-	  while(rightChain->getVertex(j+1)[1] == rightGridChain->get_v_value(rightGridChainStartIndex+1))
-	    j--;
-
-	  monoTriangulation2(rightChain->getVertex(j+1),
-			     rightGridChain->get_vertex(rightGridChainStartIndex+1),
-			     rightChain,
-			     j+2,
-			     endRightIndex,
-			     0, //a decrease chain
-			     pStream);
-
-	  temp = j+1;
-	}
-
-      stripOfFanRight(rightChain, temp, j+1, rightGridChain->getGrid(),
-		      rightGridChain->getVlineIndex(rightGridChainStartIndex+1),
-		      rightGridChain->getInnerIndex(rightGridChainStartIndex+1),
-		      rightGridChain->getUlineIndex(rightGridChainStartIndex+1),
-		      pStream,
-		      0 //the grid line is below the trim line
-		      );
-
-    }
-
-
-  stripOfFanRight(rightChain, i-1, beginRightIndex, rightGridChain->getGrid(),
-		  rightGridChain->getVlineIndex(rightGridChainStartIndex),
-		  rightGridChain->getInnerIndex(rightGridChainStartIndex+1),
-		  rightGridChain->getUlineIndex(rightGridChainStartIndex),
-		  pStream,
-		  1 //the grid line is above the trm lines
-		  );
-
-  //monotone triangulate the remaining rightchain together with the
-  //two vertices on the two grid v-lines
-  Real vert[2][2];
-  vert[0][0] = vert[1][0] = rightGridChain->getInner_u_value(rightGridChainStartIndex+1);
-  vert[0][1] = rightGridChain->get_v_value(rightGridChainStartIndex);
-  vert[1][1] = rightGridChain->get_v_value(rightGridChainStartIndex+1);
-
-  monoTriangulation2(&vert[0][0], 
-		     &vert[1][0],
-		     rightChain,
-		     i-1,
-		     j+1,
-		     0, ///a decreae chain
-		     pStream);
-}
-		  
-#endif    
-
-void stripOfFanRight(vertexArray* rightChain, 
-		    Int largeIndex,
-		    Int smallIndex,
-		    gridWrap* grid,
-		    Int vlineIndex,
-		    Int ulineSmallIndex,
-		    Int ulineLargeIndex,
-		    primStream* pStream,
-		    Int gridLineUp /*1 if the grid line is above the trim lines*/
-		     )
-{
-  assert(largeIndex >= smallIndex);
-
-  Real grid_v_value;
-  grid_v_value = grid->get_v_value(vlineIndex);
-
-  Real2* trimVerts=(Real2*) malloc(sizeof(Real2)* (largeIndex-smallIndex+1));
-  assert(trimVerts);
-
-
-  Real2* gridVerts=(Real2*) malloc(sizeof(Real2)* (ulineLargeIndex-ulineSmallIndex+1));
-  assert(gridVerts);
-
-  Int k,i;
-  if(! gridLineUp) /*trim line is above grid line, so trim vertices are going right when index increases*/
-    for(k=0, i=smallIndex; i<=largeIndex; i++, k++)
-      {
-      trimVerts[k][0] = rightChain->getVertex(i)[0];
-      trimVerts[k][1] = rightChain->getVertex(i)[1];
-    }
-  else
-    for(k=0, i=largeIndex; i>=smallIndex; i--, k++)
-      {
-	trimVerts[k][0] = rightChain->getVertex(i)[0];
-	trimVerts[k][1] = rightChain->getVertex(i)[1];
-      }
-
-  for(k=0, i=ulineSmallIndex; i<= ulineLargeIndex; i++, k++)
-    {
-      gridVerts[k][0] = grid->get_u_value(i);
-      gridVerts[k][1] = grid_v_value;
-    }
-
-  if(gridLineUp)
-    triangulateXYMono(
-		      ulineLargeIndex-ulineSmallIndex+1, gridVerts,
-		      largeIndex-smallIndex+1, trimVerts,
-		      pStream);
-  else
-    triangulateXYMono(largeIndex-smallIndex+1, trimVerts,
-		      ulineLargeIndex-ulineSmallIndex+1, gridVerts,
-		      pStream);
-  free(trimVerts);
-  free(gridVerts);
-}
-
-
-
-
-
-
-
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h b/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h
deleted file mode 100644
index 4670b87ca80..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _SAMPLECOMPRIGHT_H
-#define _SAMPLECOMPRIGHT_H
-
-#define NOT_TAKEOUT
-
-#include "sampleMonoPoly.h"
-void stripOfFanRight(vertexArray* rightChain, 
-		    Int largeIndex,
-		    Int smallIndex,
-		    gridWrap* grid,
-		    Int vlineIndex,
-		    Int ulineSmallIndex,
-		    Int ulineLargeIndex,
-		    primStream* pStream,
-		    Int gridLineUp /*1 if grid line is above the trim lines */
-		     );
-
-#ifdef NOT_TAKEOUT
-void sampleRightStripRecF(vertexArray* rightChain,
-		     Int topRightIndex,
-		     Int botRightIndex,
-		     gridBoundaryChain* rightGridChain,
-		     Int rightGridChainStartIndex,
-		     Int rightGridChainEndIndex,	
-		     primStream* pStream
-		     );
-//the degenerate case of sampleRightOneGridStep
-void sampleRightOneGridStepNoMiddle(vertexArray* rightChain,
-				    Int beginRightIndex,
-				    Int endRightIndex,
-				    gridBoundaryChain* rightGridChain,
-				    Int rightGridChainStartIndex,
-				    primStream* pStream);
-//sampling the right area in between two grid lines
-//shape: _________|
-void sampleRightOneGridStep(vertexArray* rightChain, 
-			    Int beginRightIndex,
-			    Int endRightIndex,
-			    gridBoundaryChain* rightGridChain,
-			    Int rightGridChainStartIndex,
-			    primStream* pStream);
-void sampleRightSingleTrimEdgeRegion(Real upperVert[2], Real lowerVert[2],
-				     gridBoundaryChain* gridChain,
-				     Int beginIndex,
-				     Int endIndex,
-				     primStream* pStream);
-//the degenerate case of sampleRightOneGridStep
-void sampleRightOneGridStepNoMiddle(vertexArray* rightChain,
-				    Int beginRightIndex,
-				    Int endRightIndex,
-				    gridBoundaryChain* rightGridChain,
-				    Int rightGridChainStartIndex,
-				    primStream* pStream);
-
-void sampleCompRight(Real* topVertex, Real* botVertex,
-                    vertexArray* leftChain,
-                    Int leftStartIndex, Int leftEndIndex,
-                    vertexArray* rightChain,
-                    Int rightStartIndex, Int rightEndIndex,
-                    gridBoundaryChain* rightGridChain,
-                    Int gridIndex1, Int gridIndex2,
-                    Int up_leftCornerWhere,
-                    Int up_leftCornerIndex,
-                    Int down_leftCornerWhere,
-                    Int down_leftCornerIndex,
-                    primStream* pStream);
-
-void sampleRightSingleTrimEdgeRegionGen(Real topVert[2], Real botVert[2],
-                                       vertexArray* rightChain,
-                                       Int rightStart,
-                                       Int rightEnd,
-                                       gridBoundaryChain* gridChain,
-                                       Int gridBegindex,
-                                       Int gridEndIndex,
-                                       vertexArray* leftChain,
-                                       Int leftUpBegin,
-                                       Int leftUpEnd,
-                                       Int leftDownBegin,
-                                       Int leftDownEnd,
-                                       primStream* pStream);
-#endif
-
-#endif
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc b/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc
deleted file mode 100644
index 951e937c45f..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc
+++ /dev/null
@@ -1,1030 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <math.h>
-#include "zlassert.h"
-#include "sampleCompTop.h"
-#include "sampleCompRight.h"
-
-#define max(a,b) ((a>b)? a:b)
-
-//return : index_small, and index_large,
-//from [small, large] is strictly U-monotne,
-//from [large+1, end] is <u
-//and vertex[large][0] is >= u
-//if eveybody is <u, the large = start-1.
-//otherwise both large and small are meaningful and we have start<=small<=large<=end
-void findTopLeftSegment(vertexArray* leftChain,
-                        Int leftStart,
-                        Int leftEnd,
-                        Real u,
-                        Int& ret_index_small,
-                        Int& ret_index_large
-                        )
-{
-  Int i;
-  assert(leftStart <= leftEnd);
-  for(i=leftEnd; i>= leftStart; i--)
-    {
-      if(leftChain->getVertex(i)[0] >= u)
-        break;
-    }
-  ret_index_large = i;
-  if(ret_index_large >= leftStart)
-    {
-      for(i=ret_index_large; i>leftStart; i--)
-        {
-          if(leftChain->getVertex(i-1)[0] <= leftChain->getVertex(i)[0])
-            break;
-        }
-      ret_index_small = i;
-    }
-}
-
-void findTopRightSegment(vertexArray* rightChain,
-                         Int rightStart,
-                         Int rightEnd,
-                         Real u,
-                         Int& ret_index_small,
-                         Int& ret_index_large)
-{
-  Int i;
-  assert(rightStart<=rightEnd);
-  for(i=rightEnd; i>=rightStart; i--)
-    {
-      if(rightChain->getVertex(i)[0] <= u)
-        break;
-    }
-  ret_index_large = i;
-  if(ret_index_large >= rightStart)
-    {
-      for(i=ret_index_large; i>rightStart;i--)
-        {
-          if(rightChain->getVertex(i-1)[0] >= rightChain->getVertex(i)[0])           
-	    break;
-        }
-      ret_index_small = i;
-    }
-}
-
-
-void sampleTopRightWithGridLinePost(Real* topVertex,
-				   vertexArray* rightChain,
-				   Int rightStart,
-				   Int segIndexSmall,
-				   Int segIndexLarge,
-				   Int rightEnd,
-				   gridWrap* grid,
-				   Int gridV,
-				   Int leftU,
-				   Int rightU,
-				   primStream* pStream)
-{
-  //the possible section which is to the right of rightU
-  if(segIndexLarge < rightEnd)
-    {
-      Real *tempTop;
-      if(segIndexLarge >= rightStart)
-        tempTop = rightChain->getVertex(segIndexLarge);
-      else
-        tempTop = topVertex;
-      Real tempBot[2];
-      tempBot[0] = grid->get_u_value(rightU);
-      tempBot[1] = grid->get_v_value(gridV);
-monoTriangulationRecGenOpt(tempTop, tempBot,
-			   NULL, 1,0,
-			   rightChain, segIndexLarge+1, rightEnd,
-			   pStream);
-/*
-      monoTriangulation2(tempTop, tempBot,
-                         rightChain,
-                         segIndexLarge+1,
-                         rightEnd,
-                         0, //a decrease  chian
-                         pStream);
-*/
-
-    }
-  
-  //the possible section which is strictly Umonotone
-  if(segIndexLarge >= rightStart)
-    {
-      stripOfFanRight(rightChain, segIndexLarge, segIndexSmall, grid, gridV, leftU, rightU, pStream, 0);
-      Real tempBot[2];
-      tempBot[0] = grid->get_u_value(leftU);
-      tempBot[1] = grid->get_v_value(gridV);
-      monoTriangulation2(topVertex, tempBot, rightChain, rightStart, segIndexSmall, 0, pStream);
-    }
-  else //the topVertex forms a fan with the grid points
-    grid->outputFanWithPoint(gridV, leftU, rightU, topVertex, pStream);
-}
-
-void sampleTopRightWithGridLine(Real* topVertex,
-                                vertexArray* rightChain,
-                                Int rightStart,
-                                Int rightEnd,
-                                gridWrap* grid,
-                                Int gridV,
-                                Int leftU,
-                                Int rightU,
-                                primStream* pStream
-                                )
-{
-  //if right chian is empty, then there is only one topVertex with one grid line
-  if(rightEnd < rightStart){
-    grid->outputFanWithPoint(gridV, leftU, rightU, topVertex, pStream);
-    return;
-  }
-
-  Int segIndexSmall = 0, segIndexLarge;
-  findTopRightSegment(rightChain,
-                      rightStart,
-                      rightEnd,
-                      grid->get_u_value(rightU),
-                      segIndexSmall,
-                      segIndexLarge
-                      );
-  sampleTopRightWithGridLinePost(topVertex, rightChain,
-				 rightStart,
-				 segIndexSmall,
-				 segIndexLarge,
-				 rightEnd,
-				 grid,
-				 gridV,
-				 leftU,
-				 rightU,
-				 pStream);
-}
-
-
-void sampleTopLeftWithGridLinePost(Real* topVertex,
-				   vertexArray* leftChain,
-				   Int leftStart,
-				   Int segIndexSmall,
-				   Int segIndexLarge,
-				   Int leftEnd,
-				   gridWrap* grid,
-				   Int gridV,
-				   Int leftU,
-				   Int rightU,
-				   primStream* pStream)
-{
-  //the possible section which is to the left of leftU
-
-  if(segIndexLarge < leftEnd)
-    {
-      Real *tempTop;
-      if(segIndexLarge >= leftStart)
-        tempTop = leftChain->getVertex(segIndexLarge);
-      else
-        tempTop = topVertex;
-      Real tempBot[2];
-      tempBot[0] = grid->get_u_value(leftU);
-      tempBot[1] = grid->get_v_value(gridV);
-
-      monoTriangulation2(tempTop, tempBot,
-                         leftChain,
-                         segIndexLarge+1,
-                         leftEnd,
-                         1, //a increase  chian
-                         pStream);
-    }
-
-  //the possible section which is strictly Umonotone
-  if(segIndexLarge >= leftStart)
-    {
-      //if there are grid points which are to the right of topV,
-      //then we should use topVertex to form a fan with these points to
-      //optimize the triangualtion
-      int do_optimize=1;
-      if(topVertex[0] >= grid->get_u_value(rightU))
-	do_optimize = 0;
-      else
-	{
-	  //we also have to make sure that topVertex are the right most vertex
-          //on the chain.
-	  int i;
-	  for(i=leftStart; i<=segIndexSmall; i++)
-	    if(leftChain->getVertex(i)[0] >= topVertex[0])
-	      {
-		do_optimize = 0;
-		break;
-	      }
-	}
-
-      if(do_optimize)
-	{
-	  //find midU so that grid->get_u_value(midU) >= topVertex[0]
-	  //and               grid->get_u_value(midU-1) < topVertex[0]
-	  int midU=rightU;
-	  while(grid->get_u_value(midU) >= topVertex[0])
-	    {
-	      midU--;
-	      if(midU < leftU)
-		break;
-	    }
-	  midU++;
-
-	  grid->outputFanWithPoint(gridV, midU, rightU, topVertex, pStream);
-	  stripOfFanLeft(leftChain, segIndexLarge, segIndexSmall, grid, gridV, leftU, midU, pStream, 0);
-	  Real tempBot[2];
-	  tempBot[0] = grid->get_u_value(midU);
-	  tempBot[1] = grid->get_v_value(gridV);
-	  monoTriangulation2(topVertex, tempBot, leftChain, leftStart, segIndexSmall, 1, pStream);      
-	}
-      else //not optimize
-	{
-
-	  stripOfFanLeft(leftChain, segIndexLarge, segIndexSmall, grid, gridV, leftU, rightU, pStream, 0);
-	  Real tempBot[2];
-	  tempBot[0] = grid->get_u_value(rightU);
-	  tempBot[1] = grid->get_v_value(gridV);
-	  monoTriangulation2(topVertex, tempBot, leftChain, leftStart, segIndexSmall, 1, pStream);
-	}
-    }
-  else //the topVertex forms a fan with the grid points
-    grid->outputFanWithPoint(gridV, leftU, rightU, topVertex, pStream);  
-}				   
-				   
-
-void sampleTopLeftWithGridLine(Real* topVertex,
-                                vertexArray* leftChain,
-                                Int leftStart,
-                                Int leftEnd,
-                                gridWrap* grid,
-                                Int gridV,
-                                Int leftU,
-                                Int rightU,
-                                primStream* pStream
-                                )
-{
-  Int segIndexSmall = 0, segIndexLarge;
-  //if left chain is empty, then there is only one top vertex with one grid 
-  //  line
-  if(leftEnd < leftStart) {
-    grid->outputFanWithPoint(gridV, leftU, rightU, topVertex, pStream);
-    return;
-  }
-  findTopLeftSegment(leftChain,
-                      leftStart,
-                      leftEnd,
-                      grid->get_u_value(leftU),
-                      segIndexSmall,
-                      segIndexLarge
-                      );
-  sampleTopLeftWithGridLinePost(topVertex,
-				leftChain,
-				leftStart,
-				segIndexSmall,
-				segIndexLarge,
-				leftEnd,
-				grid,
-				gridV,
-			        leftU,
-				rightU,
-				pStream);   
-}
- 
-                
-//return 1 if saprator exits, 0 otherwise
-Int findTopSeparator(vertexArray* leftChain,
-		     Int leftStartIndex,
-		     Int leftEndIndex,
-		     vertexArray* rightChain,
-		     Int rightStartIndex,
-		     Int rightEndIndex,
-		     Int& ret_sep_left,
-		     Int& ret_sep_right)
-{
-  
-  Int oldLeftI, oldRightI, newLeftI, newRightI;
-  Int i,j,k;
-  Real leftMax /*= leftChain->getVertex(leftEndIndex)[0]*/;
-  Real rightMin /*= rightChain->getVertex(rightEndIndex)[0]*/;
-  if(leftChain->getVertex(leftEndIndex)[1] > rightChain->getVertex(rightEndIndex)[1]) //left higher
-    {
-      oldLeftI = leftEndIndex+1;
-      oldRightI = rightEndIndex;
-      leftMax =  leftChain->getVertex(leftEndIndex)[0] - Real(1.0); //initilza to left of leftU
-      rightMin = rightChain->getVertex(rightEndIndex)[0];
-    }
-  else
-    {
-      oldLeftI = leftEndIndex;
-      oldRightI = rightEndIndex+1;
-      leftMax =  leftChain->getVertex(leftEndIndex)[0]; 
-      rightMin = rightChain->getVertex(rightEndIndex)[0] + Real(1.0);      
-    }
-  
-  //i: the current working leftChain index, 
-  //j: the current working rightChain index,
-  //if left(i) is higher than right(j), then the two chains beloew right(j) are separated.
-  //else the two chains below left(i) are separeated.
-  i=leftEndIndex; 
-  j=rightEndIndex;
-  while(1)
-    {
-      newLeftI = oldLeftI;
-      newRightI = oldRightI;
-
-      if(i<leftStartIndex) //left chain is done, go through remining right chain.
-	{
-	  for(k=j-1; k>= rightStartIndex; k--)
-	    {
-	      if(rightChain->getVertex(k)[0] > leftMax) //no conflict
-		{
-		  //update oldRightI if necessary
-		  if(rightChain->getVertex(k)[0] < rightMin)
-		    {
-		      rightMin = rightChain->getVertex(k)[0];
-		      oldRightI = k;
-		    }
-		}
-	      else  //there is a conflict
-		break; //the for-loop. below right(k-1) is seperated: oldLeftI, oldRightI.
-	    }
-	  break; //the while loop
-	}
-      else if(j<rightStartIndex) //rightChain is done
-	{
-	  for(k=i-1; k>= leftStartIndex; k--)
-	    {
-	      if(leftChain->getVertex(k)[0] < rightMin) //no conflict
-		{
-		  //update oldLeftI if necessary
-		  if(leftChain->getVertex(k)[0] > leftMax)
-		    {
-		      leftMax = leftChain->getVertex(k)[0];
-		      oldLeftI = k;
-		    }
-		}
-	      else //there is a conflict
-		break; //the for loop
-	    }
-	  break; //the while loop
-	}
-      else if(leftChain->getVertex(i)[1] > rightChain->getVertex(j)[1]) //left hgiher
-	{
-	  if(leftChain->getVertex(i)[0] > leftMax) //update leftMax and newLeftI.
-	    {
-	      leftMax = leftChain->getVertex(i)[0];	     
-	      newLeftI = i;
-	    }
-	  for(k=j-1; k>= rightStartIndex; k--) //update rightMin and newRightI.
-	    {
-	      if(rightChain->getVertex(k)[1] > leftChain->getVertex(i)[1])
-		break;
-	      if(rightChain->getVertex(k)[0] < rightMin)
-		{
-		  rightMin = rightChain->getVertex(k)[0];
-		  newRightI = k;
-		}
-	    }
-	  j = k; //next working j, since j will be higher than i in next loop
-	  if(leftMax >= rightMin) //there is a conflict
-	    break;
-	  else //still no conflict
-	    {
-	      oldLeftI = newLeftI;
-	      oldRightI = newRightI;
-	    }
-	}
-      else //right higher
-	{
-	  if(rightChain->getVertex(j)[0] < rightMin)
-	    {
-	      rightMin = rightChain->getVertex(j)[0];
-	      newRightI = j;
-	    }
-	  for(k=i-1; k>= leftStartIndex; k--)
-	    {
-	      if(leftChain->getVertex(k)[1] > rightChain->getVertex(j)[1])
-		break;
-	      if(leftChain->getVertex(k)[0] > leftMax)
-		{
-		  leftMax = leftChain->getVertex(k)[0];
-		  newLeftI = k;
-		}
-	    }
-	  i = k; //next working i, since i will be higher than j next loop
-	  
-	  if(leftMax >= rightMin) //there is a conflict
-	    break;
-	  else //still no conflict
-	    {
-	      oldLeftI = newLeftI;
-	      oldRightI = newRightI;
-	    }
-	}
-    }//end of while loop
-  //now oldLeftI and oldRightI are the desired separeator index, notice that there are not necessarily valid
-  if(oldLeftI > leftEndIndex || oldRightI > rightEndIndex)
-    return 0;
-  else
-    {
-      ret_sep_left = oldLeftI;
-      ret_sep_right = oldRightI;
-      return 1;
-    }
-}
-
-        
-void sampleCompTop(Real* topVertex,
-                   vertexArray* leftChain,
-                   Int leftStartIndex,
-                   vertexArray* rightChain,
-                   Int rightStartIndex,
-                   gridBoundaryChain* leftGridChain,
-                   gridBoundaryChain* rightGridChain,
-                   Int gridIndex1,
-                   Int up_leftCornerWhere,
-                   Int up_leftCornerIndex,
-                   Int up_rightCornerWhere,
-                   Int up_rightCornerIndex,
-                   primStream* pStream)
-{
-  if(up_leftCornerWhere == 1 && up_rightCornerWhere == 1) //the top is topVertex with possible grid points
-    {
-      leftGridChain->getGrid()->outputFanWithPoint(leftGridChain->getVlineIndex(gridIndex1),
-						   leftGridChain->getUlineIndex(gridIndex1),
-						   rightGridChain->getUlineIndex(gridIndex1),
-						   topVertex,
-						   pStream);
-      return;
-    }
-
-  else if(up_leftCornerWhere != 0)
-    {
-      Real* tempTop;
-      Int tempRightStart;
-      if(up_leftCornerWhere == 1){
-	tempRightStart = rightStartIndex;
-	tempTop = topVertex;
-      }
-      else
-	{
-	  tempRightStart = up_leftCornerIndex+1;
-	  tempTop = rightChain->getVertex(up_leftCornerIndex);
-	}
-      sampleTopRightWithGridLine(tempTop, rightChain, tempRightStart, up_rightCornerIndex,
-				 rightGridChain->getGrid(),
-				 leftGridChain->getVlineIndex(gridIndex1),
-				 leftGridChain->getUlineIndex(gridIndex1),
-				 rightGridChain->getUlineIndex(gridIndex1),
-				 pStream);
-    }
-  else if(up_rightCornerWhere != 2)
-    {
-      Real* tempTop;
-      Int tempLeftStart;
-      if(up_rightCornerWhere == 1)
-	{
-	  tempLeftStart = leftStartIndex;
-	  tempTop = topVertex;
-	}
-      else //0
-	{
-	  tempLeftStart = up_rightCornerIndex+1;
-	  tempTop = leftChain->getVertex(up_rightCornerIndex);
-	}
-/*
-      sampleTopLeftWithGridLine(tempTop, leftChain, tempLeftStart, up_leftCornerIndex,
-				leftGridChain->getGrid(),
-				 leftGridChain->getVlineIndex(gridIndex1),
-				 leftGridChain->getUlineIndex(gridIndex1),
-				 rightGridChain->getUlineIndex(gridIndex1),
-				 pStream);
-*/
-      sampleCompTopSimple(topVertex,
-			  leftChain,
-			  leftStartIndex,
-			  rightChain,
-			  rightStartIndex,
-			  leftGridChain,
-			  rightGridChain,
-			  gridIndex1,
-			  up_leftCornerWhere,
-			  up_leftCornerIndex,
-			  up_rightCornerWhere,
-			  up_rightCornerIndex,
-			  pStream);	      	      
-    }
-  else //up_leftCornerWhere == 0, up_rightCornerWhere == 2.
-    {
-      sampleCompTopSimple(topVertex,
-			  leftChain,
-			  leftStartIndex,
-			  rightChain,
-			  rightStartIndex,
-			  leftGridChain,
-			  rightGridChain,
-			  gridIndex1,
-			  up_leftCornerWhere,
-			  up_leftCornerIndex,
-			  up_rightCornerWhere,
-			  up_rightCornerIndex,
-			  pStream);	      	      
-      return;
-#ifdef NOT_REACHABLE //code is not reachable, for test purpose only
-      //the following code is trying to do some optimization, but not quite working, also see sampleCompBot.C:
-      Int sep_left, sep_right;
-      if(findTopSeparator(leftChain,
-			  leftStartIndex,
-			  up_leftCornerIndex,
-			  rightChain,
-			  rightStartIndex,
-			  up_rightCornerIndex,
-			  sep_left,
-			  sep_right)
-	 ) //separator exists
-	{
-
-	  if( leftChain->getVertex(sep_left)[0] >= leftGridChain->get_u_value(gridIndex1) &&
-	     rightChain->getVertex(sep_right)[0] <= rightGridChain->get_u_value(gridIndex1))
-	    {
-	      Int gridSep;
-	      Int segLeftSmall, segLeftLarge, segRightSmall, segRightLarge;
-	      Int valid=1; //whether the gridStep is valid or not.
-	      findTopLeftSegment(leftChain,
-				 sep_left,
-				 up_leftCornerIndex,
-				 leftGridChain->get_u_value(gridIndex1),
-				 segLeftSmall,
-				 segLeftLarge);
-	      findTopRightSegment(rightChain,
-				 sep_right,
-				 up_rightCornerIndex,
-				 rightGridChain->get_u_value(gridIndex1),
-				 segRightSmall,
-				 segRightLarge);
-	      if(leftChain->getVertex(segLeftSmall)[1] >= rightChain->getVertex(segRightSmall)[1])
-		{
-		  gridSep = rightGridChain->getUlineIndex(gridIndex1);
-		  while(leftGridChain->getGrid()->get_u_value(gridSep) > leftChain->getVertex(segLeftSmall)[0])
-		    gridSep--;
-		  if(segLeftSmall<segLeftLarge)
-		    if(leftGridChain->getGrid()->get_u_value(gridSep) < leftChain->getVertex(segLeftSmall+1)[0])
-		      {
-			valid = 0;
-		      }
-		}
-	      else
-		{
-		  gridSep = leftGridChain->getUlineIndex(gridIndex1);
-		  while(leftGridChain->getGrid()->get_u_value(gridSep) < rightChain->getVertex(segRightSmall)[0])
-		    gridSep++;
-		  if(segRightSmall<segRightLarge)
-		    if(leftGridChain->getGrid()->get_u_value(gridSep) > rightChain->getVertex(segRightSmall+1)[0])
-		      {
-			valid = 0;
-		      }
-		}		
-		  
-	      if(! valid)
-		{
-		  sampleCompTopSimple(topVertex,
-				      leftChain,
-				      leftStartIndex,
-				      rightChain,
-				      rightStartIndex,
-				      leftGridChain,
-				      rightGridChain,
-				      gridIndex1,
-				      up_leftCornerWhere,
-				      up_leftCornerIndex,
-				      up_rightCornerWhere,
-				      up_rightCornerIndex,
-				      pStream);	      	      
-		}
-	      else
-		{
-		  sampleTopLeftWithGridLinePost(leftChain->getVertex(segLeftSmall),
-						leftChain,
-						segLeftSmall+1,
-						segLeftSmall+1,
-						segLeftLarge,
-						up_leftCornerIndex,
-						leftGridChain->getGrid(),
-						leftGridChain->getVlineIndex(gridIndex1),
-						leftGridChain->getUlineIndex(gridIndex1),
-						gridSep,
-						pStream);
-		  sampleTopRightWithGridLinePost(rightChain->getVertex(segRightSmall),
-						 rightChain,
-						 segRightSmall+1,
-						 segRightSmall+1,
-						 segRightLarge,
-						 up_rightCornerIndex,
-						 leftGridChain->getGrid(),
-						 leftGridChain->getVlineIndex(gridIndex1),
-						 gridSep,
-						 rightGridChain->getUlineIndex(gridIndex1),
-						 pStream);
-		  Real tempBot[2];
-		  tempBot[0] = leftGridChain->getGrid()->get_u_value(gridSep);
-		  tempBot[1] = leftGridChain->get_v_value(gridIndex1);
-		  monoTriangulationRecGen(topVertex, tempBot,
-					  leftChain, leftStartIndex, segLeftSmall,
-					  rightChain, rightStartIndex, segRightSmall,
-					  pStream);
-		}
-	    }//end if both sides have vetices inside the gridboundary points
-	  else if(leftChain->getVertex(sep_left)[0] >= leftGridChain->get_u_value(gridIndex1)) //left is in, right is nout
-	    {
-
-	      Int segLeftSmall, segLeftLarge;
-	      findTopLeftSegment(leftChain,
-				 sep_left,
-				 up_leftCornerIndex,
-				 leftGridChain->get_u_value(gridIndex1),
-				 segLeftSmall,
-				 segLeftLarge);	      
-	      assert(segLeftLarge >= sep_left); 
-              monoTriangulation2(leftChain->getVertex(segLeftLarge),
-				 leftGridChain->get_vertex(gridIndex1),
-				 leftChain,
-				 segLeftLarge+1,
-				 up_leftCornerIndex,
-				 1, //a increase chain,
-				 pStream);
-
-	      stripOfFanLeft(leftChain, segLeftLarge, segLeftSmall, 
-			     leftGridChain->getGrid(),
-			     leftGridChain->getVlineIndex(gridIndex1),
-			     leftGridChain->getUlineIndex(gridIndex1),
-			     rightGridChain->getUlineIndex(gridIndex1),
-			     pStream, 0);
-
-
-	      monoTriangulationRecGen(topVertex, rightGridChain->get_vertex(gridIndex1),
-				      leftChain, leftStartIndex, segLeftSmall,
-				      rightChain, rightStartIndex, up_rightCornerIndex,
-				      pStream);	    
-	    }//end left in right out
-	  else if(rightChain->getVertex(sep_right)[0] <= rightGridChain->get_u_value(gridIndex1))
-	    {
-	      Int segRightSmall, segRightLarge;
-	      findTopRightSegment(rightChain,
-				 sep_right,
-				 up_rightCornerIndex,
-				 rightGridChain->get_u_value(gridIndex1),
-				 segRightSmall,
-				 segRightLarge);
-	      assert(segRightLarge>=sep_right);
-	      monoTriangulation2(rightChain->getVertex(segRightLarge),
-				 rightGridChain->get_vertex(gridIndex1),
-				 rightChain,
-				 segRightLarge+1,
-				 up_rightCornerIndex,
-				 0, //a decrease chain
-				 pStream);
-	      stripOfFanRight(rightChain, segRightLarge, segRightSmall,
-			      rightGridChain->getGrid(),
-			      rightGridChain->getVlineIndex(gridIndex1),
-			      leftGridChain->getUlineIndex(gridIndex1),
-			      rightGridChain->getUlineIndex(gridIndex1),
-			      pStream, 0);
-
-
-	      monoTriangulationRecGen(topVertex, leftGridChain->get_vertex(gridIndex1),
-				      leftChain, leftStartIndex, up_leftCornerIndex,
-				      rightChain, rightStartIndex,segRightSmall,
-				      pStream);
-
-	    }//end left out rigth in
-	  else //left out , right out
-	    {
-
-	      sampleCompTopSimple(topVertex,
-				  leftChain,
-				  leftStartIndex,
-				  rightChain,
-				  rightStartIndex,
-				  leftGridChain,
-				  rightGridChain,
-				  gridIndex1,
-				  up_leftCornerWhere,
-				  up_leftCornerIndex,
-				  up_rightCornerWhere,
-				  up_rightCornerIndex,
-				  pStream);	      	      
-	    }//end leftout, right out
-	}//end if separator exixts.
-      else //no separator
-	{
-
-	  sampleCompTopSimple(topVertex,
-			    leftChain,
-			      leftStartIndex,
-			      rightChain,
-			      rightStartIndex,
-			      leftGridChain,
-			      rightGridChain,
-			      gridIndex1,
-			    up_leftCornerWhere,
-			      up_leftCornerIndex,
-			      up_rightCornerWhere,
-			      up_rightCornerIndex,
-			    pStream);
-	}
-#endif
-    }//end if 0,2
-}//end if the function
-
-		   
-static void sampleCompTopSimpleOpt(gridWrap* grid,
-				   Int gridV,
-				   Real* topVertex, Real* botVertex,
-				   vertexArray* inc_chain, Int inc_current, Int inc_end,
-				   vertexArray* dec_chain, Int dec_current, Int dec_end,
-				   primStream* pStream)
-{
-  if(gridV <= 0 || dec_end<dec_current || inc_end <inc_current)
-    {
-      monoTriangulationRecGenOpt(topVertex, botVertex,
-				 inc_chain, inc_current, inc_end,
-				 dec_chain, dec_current, dec_end,
-				 pStream);
-      return;
-    }
-  if(grid->get_v_value(gridV+1) >= topVertex[1])
-    {
-      monoTriangulationRecGenOpt(topVertex, botVertex,
-				 inc_chain, inc_current, inc_end,
-				 dec_chain, dec_current, dec_end,
-				 pStream);
-      return;
-    }      
- Int i,j,k;
-  Real currentV = grid->get_v_value(gridV+1);
-  if(inc_chain->getVertex(inc_end)[1] <= currentV &&
-     dec_chain->getVertex(dec_end)[1] < currentV)
-    {
-      //find i bottom up so that inc_chain[i]<= curentV and inc_chain[i-1] > currentV, 
-      //find j botom up so that dec_chain[j] < currentV and dec_chain[j-1] >= currentV
-      for(i=inc_end; i >= inc_current; i--) 
-	{
-	  if(inc_chain->getVertex(i)[1] > currentV)
-	    break;
-	}
-      i++;
-      for(j=dec_end; j >= dec_current; j--)
-	{
-	  if(dec_chain->getVertex(j)[1] >= currentV)
-	    break;
-	}
-      j++;
-     if(inc_chain->getVertex(i)[1] <= dec_chain->getVertex(j)[1])
-       {
-	 //find the k so that dec_chain[k][1] < inc_chain[i][1]
-	 for(k=j; k<=dec_end; k++)
-	   {
-	     if(dec_chain->getVertex(k)[1] < inc_chain->getVertex(i)[1])
-	       break;
-	   }
-         //we know that dec_chain[j][1] >= inc_chian[i][1]
-	 //we know that dec_chain[k-1][1]>=inc_chain[i][1]
-         //we know that dec_chian[k][1] < inc_chain[i][1]
-         //find l in [j, k-1] so that dec_chain[l][0] 0 is closest to
-         // inc_chain[i]
-         int l;
-         Real tempI = Real(j);
-         Real tempMin = (Real)fabs(inc_chain->getVertex(i)[0] - dec_chain->getVertex(j)[0]);
-         for(l=j+1; l<= k-1; l++)
-	   {
-	     if(fabs(inc_chain->getVertex(i)[0] - dec_chain->getVertex(l)[0])
-		<= tempMin)
-	       {
-		 tempMin = (Real)fabs(inc_chain->getVertex(i)[0] - dec_chain->getVertex(l)[0]);
-		 tempI = (Real)l;
-	       }
-	   }
-	 //inc_chain[i] and dec_chain[tempI] are connected.
-	 monoTriangulationRecGenOpt(dec_chain->getVertex((int)tempI),
-				    botVertex,
-				    inc_chain, i, inc_end,
-				    dec_chain, (int)(tempI+1), dec_end,
-				    pStream);
-	 //recursively do the rest
-	 sampleCompTopSimpleOpt(grid,
-				gridV+1,
-				topVertex, inc_chain->getVertex(i),
-				inc_chain, inc_current, i-1,
-				dec_chain, dec_current, (int)tempI,
-				pStream);
-       }
-      else
-	{
-	  //find the k so that inc_chain[k][1] <= dec_chain[j][1]
-	  for(k=i; k<=inc_end; k++)
-	    {
-	      if(inc_chain->getVertex(k)[1] <= dec_chain->getVertex(j)[1])
-		break;
-	    }
-	  //we know that inc_chain[i] > dec_chain[j]
-	  //we know that inc_chain[k-1][1] > dec_chain[j][1]
-	  //we know that inc_chain[k][1] <= dec_chain[j][1]
-	  //so we find l between [i,k-1] so that 
-	  //inc_chain[l][0] is the closet to dec_chain[j][0]
-	  int tempI = i;
-	  int l;
-	  Real tempMin = (Real)fabs(inc_chain->getVertex(i)[0] - dec_chain->getVertex(j)[0]);
-	  for(l=i+1; l<=k-1; l++)
-	    {
-	      if(fabs(inc_chain->getVertex(l)[0] - dec_chain->getVertex(j)[0]) <= tempMin)
-		{
-		  tempMin = (Real)fabs(inc_chain->getVertex(l)[0] - dec_chain->getVertex(j)[0]);
-		  tempI = l;
-		}
-	    }				 	      
-
-	  //inc_chain[tempI] and dec_chain[j] are connected
-
-	  monoTriangulationRecGenOpt(inc_chain->getVertex(tempI),
-				     botVertex,
-				     inc_chain, tempI+1, inc_end,
-				     dec_chain, j, dec_end,
-				     pStream);
-
-	  //recurvesily do the rest
-	  sampleCompTopSimpleOpt(grid, gridV+1,
-				 topVertex, dec_chain->getVertex(j),
-				 inc_chain, inc_current, tempI,
-				 dec_chain, dec_current, j-1,
-				 pStream);
-	}	    				   	       
-    }
-  else //go to the next higher gridV
-    {
-      sampleCompTopSimpleOpt(grid,
-			     gridV+1,
-			     topVertex, botVertex,
-			     inc_chain, inc_current, inc_end,
-			     dec_chain, dec_current, dec_end,
-			     pStream);
-    }
-}
-			  
-void sampleCompTopSimple(Real* topVertex,
-                   vertexArray* leftChain,
-                   Int leftStartIndex,
-                   vertexArray* rightChain,
-                   Int rightStartIndex,
-                   gridBoundaryChain* leftGridChain,
-                   gridBoundaryChain* rightGridChain,
-                   Int gridIndex1,
-                   Int up_leftCornerWhere,
-                   Int up_leftCornerIndex,
-                   Int up_rightCornerWhere,
-                   Int up_rightCornerIndex,
-                   primStream* pStream)
-{
-  //the plan is to use monotriangulation algortihm.
-  Int i,k;
-  Real* ActualTop;
-  Real* ActualBot;
-  Int ActualLeftStart, ActualLeftEnd;
-  Int ActualRightStart, ActualRightEnd;
-  
-  //creat an array to store the points on the grid line
-  gridWrap* grid = leftGridChain->getGrid();
-  Int gridV = leftGridChain->getVlineIndex(gridIndex1);
-  Int gridLeftU = leftGridChain->getUlineIndex(gridIndex1);
-  Int gridRightU = rightGridChain->getUlineIndex(gridIndex1);
-
-  Real2* gridPoints = (Real2*) malloc(sizeof(Real2) * (gridRightU - gridLeftU +1));
-  assert(gridPoints);
-  
-  for(k=0, i=gridRightU; i>= gridLeftU; i--, k++)
-    {
-      gridPoints[k][0] = grid->get_u_value(i);
-      gridPoints[k][1] = grid->get_v_value(gridV);
-    }
-
-  if(up_leftCornerWhere != 2)
-    ActualRightStart = rightStartIndex;
-  else
-    ActualRightStart = up_leftCornerIndex+1; //up_leftCornerIndex will be the ActualTop
-  
-  if(up_rightCornerWhere != 2) //right corner is not on right chain
-    ActualRightEnd = rightStartIndex-1; //meaning that there is no actual rigth section
-  else
-    ActualRightEnd = up_rightCornerIndex;
-  
-  vertexArray ActualRightChain(max(0, ActualRightEnd-ActualRightStart+1) + gridRightU-gridLeftU+1);
-
-  for(i=ActualRightStart; i<= ActualRightEnd; i++)
-    ActualRightChain.appendVertex(rightChain->getVertex(i));
-  for(i=0; i<gridRightU-gridLeftU+1; i++)
-    ActualRightChain.appendVertex(gridPoints[i]);    
-
-  //determine ActualLeftEnd
-  if(up_leftCornerWhere != 0)
-    ActualLeftEnd = leftStartIndex-1;
-  else
-    ActualLeftEnd = up_leftCornerIndex;
-  
-  if(up_rightCornerWhere != 0)
-    ActualLeftStart = leftStartIndex;
-  else
-    ActualLeftStart = up_rightCornerIndex+1; //up_rightCornerIndex will be the actual top
-  
-  if(up_leftCornerWhere == 0) 
-    {
-      if(up_rightCornerWhere == 0)
-	ActualTop = leftChain->getVertex(up_rightCornerIndex);
-      else
-	ActualTop = topVertex;
-    }
-  else if(up_leftCornerWhere == 1) 
-    ActualTop = topVertex;
-  else  //up_leftCornerWhere == 2
-    ActualTop = rightChain->getVertex(up_leftCornerIndex);
-  
-  ActualBot = gridPoints[gridRightU - gridLeftU];
-  
-
-
-
-  if(leftChain->getVertex(ActualLeftEnd)[1] == ActualBot[1])
-    {
-/*
-    monoTriangulationRecGenOpt(ActualTop, leftChain->getVertex(ActualLeftEnd),
-			    leftChain,
-			    ActualLeftStart, ActualLeftEnd-1,
-			    &ActualRightChain,
-			    0,
-			    ActualRightChain.getNumElements()-1,
-			    pStream);
-*/
-   
-    sampleCompTopSimpleOpt(grid, gridV,
-			   ActualTop, leftChain->getVertex(ActualLeftEnd),
-			    leftChain,
-			    ActualLeftStart, ActualLeftEnd-1,
-			    &ActualRightChain,
-			    0,
-			    ActualRightChain.getNumElements()-1,
-			    pStream);
-    
-  }
-  else
-    {
-/*
-    monoTriangulationRecGenOpt(ActualTop, ActualBot, leftChain,
-			  ActualLeftStart, ActualLeftEnd,
-			  &ActualRightChain,
-			  0, ActualRightChain.getNumElements()-2, //the last is the bot.
-			  pStream);
-*/
-   	  
-    sampleCompTopSimpleOpt(grid, gridV,
-			   ActualTop, ActualBot, leftChain,
-			  ActualLeftStart, ActualLeftEnd,
-			  &ActualRightChain,
-			  0, ActualRightChain.getNumElements()-2, //the last is the bot.
-			  pStream);
-
-   
-  }
-
-  free(gridPoints);
-      
-}		  
-						   
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h b/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h
deleted file mode 100644
index 95598d63a8b..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _SAMPLECOMPTOP_H
-#define _SAMPLECOMPTOP_H
-
-#include "sampleMonoPoly.h"
-
-void sampleCompTop(Real* topVertex,
-                   vertexArray* leftChain,
-                   Int leftStartIndex,
-                   vertexArray* rightChain,
-                   Int rightStartIndex,
-                   gridBoundaryChain* leftGridChain,
-                   gridBoundaryChain* rightGridChain,
-                   Int gridIndex1,
-                   Int up_leftCornerWhere,
-                   Int up_leftCornerIndex,
-                   Int up_rightCornerWhere,
-                   Int up_rightCornerIndex,
-                   primStream* pStream);
-
-void sampleCompTopSimple(Real* topVertex,
-                   vertexArray* leftChain,
-                   Int leftStartIndex,
-                   vertexArray* rightChain,
-                   Int rightStartIndex,
-                   gridBoundaryChain* leftGridChain,
-                   gridBoundaryChain* rightGridChain,
-                   Int gridIndex1,
-                   Int up_leftCornerWhere,
-                   Int up_leftCornerIndex,
-                   Int up_rightCornerWhere,
-                   Int up_rightCornerIndex,
-                   primStream* pStream);
-
-#endif
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc b/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc
deleted file mode 100644
index 051f2410834..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc
+++ /dev/null
@@ -1,2427 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include "gluos.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <math.h>
-
-#ifndef max
-#define max(a,b) ((a>b)? a:b)
-#endif
-#ifndef min
-#define min(a,b) ((a>b)? b:a)
-#endif
-
-#include <GL/gl.h>
-
-#include "glimports.h"
-#include "zlassert.h"
-#include "sampleMonoPoly.h"
-#include "sampleComp.h"
-#include "polyDBG.h"
-#include "partitionX.h"
-
-
-#define ZERO 0.00001
-
-//#define  MYDEBUG
-
-//#define SHORTEN_GRID_LINE
-//see work/newtess/internal/test/problems
-
-
-/*split a polygon so that each vertex correcpond to one edge
- *the head of the first edge of the returned plygon must be the head of the first
- *edge of the origianl polygon. This is crucial for the code in sampleMonoPoly function
- */
- directedLine*  polygonConvert(directedLine* polygon)
-{
-  int i;
-  directedLine* ret;
-  sampledLine* sline;
-  sline = new sampledLine(2);
-  sline->setPoint(0, polygon->getVertex(0));
-  sline->setPoint(1, polygon->getVertex(1));
-  ret=new directedLine(INCREASING, sline);
-  for(i=1; i<= polygon->get_npoints()-2; i++)
-    {
-      sline = new sampledLine(2);
-      sline->setPoint(0, polygon->getVertex(i));
-      sline->setPoint(1, polygon->getVertex(i+1));
-      ret->insert(new directedLine(INCREASING, sline));
-    }
-
-  for(directedLine *temp = polygon->getNext(); temp != polygon; temp = temp->getNext())
-    {
-      for(i=0; i<= temp->get_npoints()-2; i++)
-	{
-	  sline = new sampledLine(2);
-	  sline->setPoint(0, temp->getVertex(i));
-	  sline->setPoint(1, temp->getVertex(i+1));
-	  ret->insert(new directedLine(INCREASING, sline));
-	}
-    }
-  return ret;
-}
-
-void triangulateConvexPolyVertical(directedLine* topV, directedLine* botV, primStream *pStream)
-{
-  Int i,j;
-  Int n_leftVerts;
-  Int n_rightVerts;
-  Real** leftVerts;
-  Real** rightVerts;
-  directedLine* tempV;
-  n_leftVerts = 0;
-  for(tempV = topV; tempV != botV; tempV = tempV->getNext())
-    {
-      n_leftVerts += tempV->get_npoints();
-    }
-  n_rightVerts=0;
-  for(tempV = botV; tempV != topV; tempV = tempV->getNext())
-    {
-      n_rightVerts += tempV->get_npoints();
-    }
-
-  Real2* temp_leftVerts = (Real2 *) malloc(sizeof(Real2) * n_leftVerts);
-  assert(temp_leftVerts);
-  Real2* temp_rightVerts = (Real2 *) malloc(sizeof(Real2) * n_rightVerts);
-  assert(temp_rightVerts);
-
-  leftVerts = (Real**) malloc(sizeof(Real2*) * n_leftVerts);
-  assert(leftVerts);
-  rightVerts = (Real**) malloc(sizeof(Real2*) * n_rightVerts);
-  assert(rightVerts);
-  for(i=0; i<n_leftVerts; i++)
-    leftVerts[i] = temp_leftVerts[i];
-  for(i=0; i<n_rightVerts; i++)
-    rightVerts[i] = temp_rightVerts[i];
-
-  i=0;
-  for(tempV = topV; tempV != botV; tempV = tempV->getNext())
-    {
-      for(j=1; j<tempV->get_npoints(); j++)
-	{
-	  leftVerts[i][0] = tempV->getVertex(j)[0];
-	  leftVerts[i][1] = tempV->getVertex(j)[1];
-	  i++;
-	}
-    }
-  n_leftVerts = i;
-  i=0;
-  for(tempV = topV->getPrev(); tempV != botV->getPrev(); tempV = tempV->getPrev())
-    {
-      for(j=tempV->get_npoints()-1; j>=1; j--)
-	{
-	  rightVerts[i][0] = tempV->getVertex(j)[0];
-	  rightVerts[i][1] = tempV->getVertex(j)[1];
-	  i++;
-	}
-    }
-  n_rightVerts = i;
-  triangulateXYMonoTB(n_leftVerts, leftVerts, n_rightVerts, rightVerts, pStream);
-  free(leftVerts);
-  free(rightVerts);
-  free(temp_leftVerts);
-  free(temp_rightVerts);
-}  
-
-void triangulateConvexPolyHoriz(directedLine* leftV, directedLine* rightV, primStream *pStream)
-{
-  Int i,j;
-  Int n_lowerVerts;
-  Int n_upperVerts;
-  Real2 *lowerVerts;
-  Real2 *upperVerts;
-  directedLine* tempV;
-  n_lowerVerts=0;
-  for(tempV = leftV; tempV != rightV; tempV = tempV->getNext())
-    {
-      n_lowerVerts += tempV->get_npoints();
-    }
-  n_upperVerts=0;
-  for(tempV = rightV; tempV != leftV; tempV = tempV->getNext())
-    {
-      n_upperVerts += tempV->get_npoints();
-    }
-  lowerVerts = (Real2 *) malloc(sizeof(Real2) * n_lowerVerts);
-  assert(n_lowerVerts);
-  upperVerts = (Real2 *) malloc(sizeof(Real2) * n_upperVerts);
-  assert(n_upperVerts);
-  i=0;
-  for(tempV = leftV; tempV != rightV; tempV = tempV->getNext())
-    {
-      for(j=0; j<tempV->get_npoints(); j++)
-	{
-	  lowerVerts[i][0] = tempV->getVertex(j)[0];
-	  lowerVerts[i][1] = tempV->getVertex(j)[1];
-	  i++;
-	}
-    }
-  i=0;
-  for(tempV = leftV->getPrev(); tempV != rightV->getPrev(); tempV = tempV->getPrev())
-    {
-      for(j=tempV->get_npoints()-1; j>=0; j--)
-	{
-	  upperVerts[i][0] = tempV->getVertex(j)[0];
-	  upperVerts[i][1] = tempV->getVertex(j)[1];
-	  i++;
-	}
-    }
-  triangulateXYMono(n_upperVerts, upperVerts, n_lowerVerts, lowerVerts, pStream);
-  free(lowerVerts);
-  free(upperVerts);
-}  
-void triangulateConvexPoly(directedLine* polygon, Int ulinear, Int vlinear, primStream* pStream)
-{
-  /*find left, right, top , bot
-    */
-  directedLine* tempV;
-  directedLine* topV;
-  directedLine* botV;
-  directedLine* leftV;
-  directedLine* rightV;
-  topV = botV = polygon;
-
-  for(tempV = polygon->getNext(); tempV != polygon; tempV = tempV->getNext())
-    {
-      if(compV2InY(topV->head(), tempV->head())<0) {
-
-	topV = tempV;
-      }
-      if(compV2InY(botV->head(), tempV->head())>0) {
-
-	botV = tempV;
-      }
-    }
-  //find leftV
-  for(tempV = topV; tempV != botV; tempV = tempV->getNext())
-    {
-      if(tempV->tail()[0] >= tempV->head()[0])
-	break;
-    }
-  leftV = tempV;
-  //find rightV
-  for(tempV = botV; tempV != topV; tempV = tempV->getNext())
-    {
-      if(tempV->tail()[0] <= tempV->head()[0])
-	break;
-    }
-  rightV = tempV;
-  if(vlinear)
-    {
-      triangulateConvexPolyHoriz( leftV, rightV, pStream);
-    }
-  else if(ulinear)
-    {
-      triangulateConvexPolyVertical(topV, botV, pStream);
-    }
-  else
-    {
-      if(DBG_is_U_direction(polygon))
-	{
-	  triangulateConvexPolyHoriz( leftV, rightV, pStream);
-	}
-      else
-	triangulateConvexPolyVertical(topV, botV, pStream);
-    }
-}	      
-
-/*for debug purpose*/
-void drawCorners(
-		 Real* topV, Real* botV,		 
-		 vertexArray* leftChain,
-		 vertexArray* rightChain,
-		 gridBoundaryChain* leftGridChain,
-		 gridBoundaryChain* rightGridChain,
-		 Int gridIndex1,
-		 Int gridIndex2,
-		 Int leftCornerWhere,
-		 Int leftCornerIndex,
-		 Int rightCornerWhere,
-		 Int rightCornerIndex,
-		 Int bot_leftCornerWhere,
-		 Int bot_leftCornerIndex,
-		 Int bot_rightCornerWhere,
-		 Int bot_rightCornerIndex)
-{
-  Real* leftCornerV;
-  Real* rightCornerV;
-  Real* bot_leftCornerV;
-  Real* bot_rightCornerV;
-
-  if(leftCornerWhere == 1)
-    leftCornerV = topV;
-  else if(leftCornerWhere == 0)
-    leftCornerV = leftChain->getVertex(leftCornerIndex);
-  else
-    leftCornerV = rightChain->getVertex(leftCornerIndex);
-
-  if(rightCornerWhere == 1)
-    rightCornerV = topV;
-  else if(rightCornerWhere == 0)
-    rightCornerV = leftChain->getVertex(rightCornerIndex);
-  else
-    rightCornerV = rightChain->getVertex(rightCornerIndex);
-
-  if(bot_leftCornerWhere == 1)
-    bot_leftCornerV = botV;
-  else if(bot_leftCornerWhere == 0)
-    bot_leftCornerV = leftChain->getVertex(bot_leftCornerIndex);
-  else
-    bot_leftCornerV = rightChain->getVertex(bot_leftCornerIndex);
-
-  if(bot_rightCornerWhere == 1)
-    bot_rightCornerV = botV;
-  else if(bot_rightCornerWhere == 0)
-    bot_rightCornerV = leftChain->getVertex(bot_rightCornerIndex);
-  else
-    bot_rightCornerV = rightChain->getVertex(bot_rightCornerIndex);
-
-  Real topGridV = leftGridChain->get_v_value(gridIndex1);
-  Real topGridU1 = leftGridChain->get_u_value(gridIndex1);
-  Real topGridU2 = rightGridChain->get_u_value(gridIndex1);
-  Real botGridV = leftGridChain->get_v_value(gridIndex2);
-  Real botGridU1 = leftGridChain->get_u_value(gridIndex2);
-  Real botGridU2 = rightGridChain->get_u_value(gridIndex2);
-  
-  glBegin(GL_LINE_STRIP);
-  glVertex2fv(leftCornerV);
-  glVertex2f(topGridU1, topGridV);
-  glEnd();
-
-  glBegin(GL_LINE_STRIP);
-  glVertex2fv(rightCornerV);
-  glVertex2f(topGridU2, topGridV);
-  glEnd();
-
-  glBegin(GL_LINE_STRIP);
-  glVertex2fv(bot_leftCornerV);
-  glVertex2f(botGridU1, botGridV);
-  glEnd();
-
-  glBegin(GL_LINE_STRIP);
-  glVertex2fv(bot_rightCornerV);
-  glVertex2f(botGridU2, botGridV);
-  glEnd();
-
-
-}
-		 
-void toVertexArrays(directedLine* topV, directedLine* botV, vertexArray& leftChain, vertexArray& rightChain)
-{  
-  Int i;
-  directedLine* tempV;
-  for(i=1; i<=topV->get_npoints()-2; i++) { /*the first vertex is the top vertex which doesn't belong to inc_chain*/
-    leftChain.appendVertex(topV->getVertex(i));
-  }
-  for(tempV = topV->getNext(); tempV != botV; tempV = tempV->getNext())
-    {
-      for(i=0; i<=tempV->get_npoints()-2; i++){
-	leftChain.appendVertex(tempV->getVertex(i));
-      }
-    }  
-
-  for(tempV = topV->getPrev(); tempV != botV; tempV = tempV->getPrev())
-    {
-      for(i=tempV->get_npoints()-2; i>=0; i--){
-	rightChain.appendVertex(tempV->getVertex(i));
-      }
-    }
-  for(i=botV->get_npoints()-2; i>=1; i--){ 
-    rightChain.appendVertex(tempV->getVertex(i));
-  }
-}
-
-
-void findTopAndBot(directedLine* polygon, directedLine*& topV, directedLine*& botV)
-{
-  assert(polygon);
-  directedLine* tempV;
-  topV = botV = polygon;
-   for(tempV = polygon->getNext(); tempV != polygon; tempV = tempV->getNext())
-    {
-      if(compV2InY(topV->head(), tempV->head())<0) {
-	topV = tempV;
-      }
-      if(compV2InY(botV->head(), tempV->head())>0) {
-	botV = tempV;
-      }
-    }
-}
-   
-void findGridChains(directedLine* topV, directedLine* botV, 
-		    gridWrap* grid,
-		    gridBoundaryChain*& leftGridChain,
-		    gridBoundaryChain*& rightGridChain)
-{
-  /*find the first(top) and the last (bottom) grid line which intersect the
-   *this polygon
-   */
-  Int firstGridIndex; /*the index in the grid*/
-  Int lastGridIndex;
-
-  firstGridIndex = (Int) ((topV->head()[1] - grid->get_v_min()) / (grid->get_v_max() - grid->get_v_min()) * (grid->get_n_vlines()-1));
-
-  if(botV->head()[1] < grid->get_v_min())
-    lastGridIndex = 0;
-  else
-    lastGridIndex  = (Int) ((botV->head()[1] - grid->get_v_min()) / (grid->get_v_max() - grid->get_v_min()) * (grid->get_n_vlines()-1)) + 1;
-
-  /*find the interval inside  the polygon for each gridline*/
-  Int *leftGridIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(leftGridIndices);
-  Int *rightGridIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(rightGridIndices);
-  Int *leftGridInnerIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(leftGridInnerIndices);
-  Int *rightGridInnerIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(rightGridInnerIndices);
-
-  findLeftGridIndices(topV, firstGridIndex, lastGridIndex, grid,  leftGridIndices, leftGridInnerIndices);
-
-  findRightGridIndices(topV, firstGridIndex, lastGridIndex, grid,  rightGridIndices, rightGridInnerIndices);
-
-  leftGridChain =  new gridBoundaryChain(grid, firstGridIndex, firstGridIndex-lastGridIndex+1, leftGridIndices, leftGridInnerIndices);
-
-  rightGridChain = new gridBoundaryChain(grid, firstGridIndex, firstGridIndex-lastGridIndex+1, rightGridIndices, rightGridInnerIndices);
-
-  free(leftGridIndices);
-  free(rightGridIndices);
-  free(leftGridInnerIndices);
-  free(rightGridInnerIndices);
-}
-
-void findDownCorners(Real *botVertex, 
-		   vertexArray *leftChain, Int leftChainStartIndex, Int leftChainEndIndex,
-		   vertexArray *rightChain, Int rightChainStartIndex, Int rightChainEndIndex,
-		   Real v,
-		   Real uleft,
-		   Real uright,
-		   Int& ret_leftCornerWhere, /*0: left chain, 1: topvertex, 2: rightchain*/
-		   Int& ret_leftCornerIndex, /*useful when ret_leftCornerWhere == 0 or 2*/
-		   Int& ret_rightCornerWhere, /*0: left chain, 1: topvertex, 2: rightchain*/
-		   Int& ret_rightCornerIndex /*useful when ret_leftCornerWhere == 0 or 2*/
-		   )
-{
-#ifdef MYDEBUG
-printf("*************enter find donw corner\n");
-printf("finddownCorner: v=%f, uleft=%f, uright=%f\n", v, uleft, uright);
-printf("(%i,%i,%i,%i)\n", leftChainStartIndex, leftChainEndIndex,rightChainStartIndex, rightChainEndIndex); 
-printf("left chain is\n");
-leftChain->print();
-printf("right chain is\n");
-rightChain->print();
-#endif
-
-  assert(v > botVertex[1]);
-  Real leftGridPoint[2];
-  leftGridPoint[0] = uleft;
-  leftGridPoint[1] = v;
-  Real rightGridPoint[2];
-  rightGridPoint[0] = uright;
-  rightGridPoint[1] = v;
-
-  Int i;
-  Int index1, index2;
-
-  index1 = leftChain->findIndexBelowGen(v, leftChainStartIndex, leftChainEndIndex);
-  index2 = rightChain->findIndexBelowGen(v, rightChainStartIndex, rightChainEndIndex);
-
-  if(index2 <= rightChainEndIndex) //index2 was found above
-    index2 = rightChain->skipEqualityFromStart(v, index2, rightChainEndIndex);
-
-  if(index1>leftChainEndIndex && index2 > rightChainEndIndex) /*no point below v on left chain or right chain*/
-    {
-
-      /*the botVertex is the only vertex below v*/
-      ret_leftCornerWhere = 1;
-      ret_rightCornerWhere = 1;
-    }
-  else if(index1>leftChainEndIndex ) /*index2 <= rightChainEndIndex*/
-    {
-
-      ret_rightCornerWhere = 2; /*on right chain*/
-      ret_rightCornerIndex = index2;
-
-
-      Real tempMin = rightChain->getVertex(index2)[0];
-      Int tempI = index2;
-      for(i=index2+1; i<= rightChainEndIndex; i++)
-	if(rightChain->getVertex(i)[0] < tempMin)
-	  {
-	    tempI = i;
-	    tempMin = rightChain->getVertex(i)[0];
-	  }
-
-
-      //we consider whether we can use botVertex as left corner. First check 
-      //if (leftGirdPoint, botVertex) interesects right chian or not.
-     if(DBG_intersectChain(rightChain, rightChainStartIndex,rightChainEndIndex,
-				    leftGridPoint, botVertex))
-       {
-	 ret_leftCornerWhere = 2;//right
-	 ret_leftCornerIndex = index2; //should use tempI???
-       }
-     else if(botVertex[0] < tempMin)
-       ret_leftCornerWhere = 1; //bot
-     else
-       {
-	 ret_leftCornerWhere = 2; //right
-	 ret_leftCornerIndex = tempI;
-       }
-    }
-  else if(index2> rightChainEndIndex) /*index1<=leftChainEndIndex*/
-    {
-      ret_leftCornerWhere = 0; /*left chain*/
-      ret_leftCornerIndex = index1;
-      
-      /*find the vertex on the left chain with the maximum u,
-       *either this vertex or the botvertex can be used as the right corner
-       */
-
-      Int tempI;
-      //skip those points which are equal to v. (avoid degeneratcy)
-      for(tempI = index1; tempI <= leftChainEndIndex; tempI++)
-	if(leftChain->getVertex(tempI)[1] < v) 
-	  break;
-      if(tempI > leftChainEndIndex)
-	ret_rightCornerWhere = 1;
-      else
-	{
-	  Real tempMax = leftChain->getVertex(tempI)[0];
-	  for(i=tempI; i<= leftChainEndIndex; i++)
-	    if(leftChain->getVertex(i)[0] > tempMax)
-	      {
-		tempI = i;
-		tempMax = leftChain->getVertex(i)[0];
-	      }
-
-
-
-	  //we consider whether we can use botVertex as a corner. So first we check 
-	  //whether (rightGridPoint, botVertex) interescts the left chain or not.
-	  if(DBG_intersectChain(leftChain, leftChainStartIndex,leftChainEndIndex,
-				    rightGridPoint, botVertex))
-	    {
-	      ret_rightCornerWhere = 0;
-	      ret_rightCornerIndex = index1; //should use tempI???
-	    }
-	  else if(botVertex[0] > tempMax)
-	    {
-		      
-              ret_rightCornerWhere = 1;
-	    }
-	  else
-	    {
-	      ret_rightCornerWhere = 0;
-	      ret_rightCornerIndex = tempI;
-	    }
-	}
-      
-    }
-  else /*index1<=leftChainEndIndex and index2 <=rightChainEndIndex*/
-    {
-      if(leftChain->getVertex(index1)[1] >= rightChain->getVertex(index2)[1]) /*left point above right point*/
-	{
-	  ret_leftCornerWhere = 0; /*on left chain*/
-	  ret_leftCornerIndex = index1;
-
-	  Real tempMax;
-	  Int tempI;
-
-	  tempI = index1;
-	  tempMax = leftChain->getVertex(index1)[0];
-
-	  /*find the maximum u for all the points on the left above the right point index2*/
-	  for(i=index1+1; i<= leftChainEndIndex; i++)
-	    {
-	      if(leftChain->getVertex(i)[1] < rightChain->getVertex(index2)[1])
-		break;
-
-	      if(leftChain->getVertex(i)[0]>tempMax)
-		{
-		  tempI = i;
-		  tempMax = leftChain->getVertex(i)[0];
-		}
-	    }
-	  //we consider if we can use rightChain(index2) as right corner
-	  //we check if (rightChain(index2), rightGidPoint) intersecs left chain or not.
-	  if(DBG_intersectChain(leftChain, leftChainStartIndex,leftChainEndIndex, rightGridPoint, rightChain->getVertex(index2)))
-	    {
-	      ret_rightCornerWhere = 0;
-	      ret_rightCornerIndex = index1; //should use tempI???
-	    }
-	  else if(tempMax >= rightChain->getVertex(index2)[0] ||
-	     tempMax >= uright
-	     )
-	    {
-
-	      ret_rightCornerWhere = 0; /*on left Chain*/
-	      ret_rightCornerIndex = tempI;
-	    }
-	  else
-	    {
-	      ret_rightCornerWhere = 2; /*on right chain*/
-	      ret_rightCornerIndex = index2;
-	    }
-	}
-      else /*left below right*/
-	{
-	  ret_rightCornerWhere = 2; /*on the right*/
-	  ret_rightCornerIndex = index2;
-	  
-	  Real tempMin;
-	  Int tempI;
-	  
-	  tempI = index2;
-	  tempMin = rightChain->getVertex(index2)[0];
-	  
-	  /*find the minimum u for all the points on the right above the left poitn index1*/
-	  for(i=index2+1; i<= rightChainEndIndex; i++)
-	    {
-	      if( rightChain->getVertex(i)[1] < leftChain->getVertex(index1)[1])
-		break;
-	      if(rightChain->getVertex(i)[0] < tempMin)
-		{
-		  tempI = i;
-		  tempMin = rightChain->getVertex(i)[0];
-		}
-	    }
-
-	  //we consider if we can use leftchain(index1) as left corner. 
-	  //we check if (leftChain(index1) intersects right chian or not
-	  if(DBG_intersectChain(rightChain, rightChainStartIndex, rightChainEndIndex, leftGridPoint, leftChain->getVertex(index1)))
-	    {
-	      ret_leftCornerWhere = 2;
-	      ret_leftCornerIndex = index2; //should use tempI???
-	      }
-	  else if(tempMin <= leftChain->getVertex(index1)[0] ||
-	     tempMin <= uleft)				
-	    {
-	      ret_leftCornerWhere = 2; /* on right chain*/
-	      ret_leftCornerIndex = tempI;
-	    }
-	  else
-	    {
-	      ret_leftCornerWhere = 0; /*on left chain*/
-	      ret_leftCornerIndex = index1;
-	    }
-	}
-    }
-
-}
-
-
-void findUpCorners(Real *topVertex, 
-		   vertexArray *leftChain, Int leftChainStartIndex, Int leftChainEndIndex,
-		   vertexArray *rightChain, Int rightChainStartIndex, Int rightChainEndIndex,
-		   Real v,
-		   Real uleft,
-		   Real uright,
-		   Int& ret_leftCornerWhere, /*0: left chain, 1: topvertex, 2: rightchain*/
-		   Int& ret_leftCornerIndex, /*useful when ret_leftCornerWhere == 0 or 2*/
-		   Int& ret_rightCornerWhere, /*0: left chain, 1: topvertex, 2: rightchain*/
-		   Int& ret_rightCornerIndex /*useful when ret_leftCornerWhere == 0 or 2*/
-		   )
-{
-#ifdef MYDEBUG
-printf("***********enter findUpCorners\n");
-#endif
-
-  assert(v < topVertex[1]);
-  Real leftGridPoint[2];
-  leftGridPoint[0] = uleft;
-  leftGridPoint[1] = v;
-  Real rightGridPoint[2];
-  rightGridPoint[0] = uright;
-  rightGridPoint[1] = v;
-
-  Int i;
-  Int index1, index2;
-
-  index1 = leftChain->findIndexFirstAboveEqualGen(v, leftChainStartIndex, leftChainEndIndex);
-
-
-  index2 = rightChain->findIndexFirstAboveEqualGen(v, rightChainStartIndex, rightChainEndIndex);
-
-  if(index2>= leftChainStartIndex)  //index2 was found above  
-    index2 = rightChain->skipEqualityFromStart(v, index2, rightChainEndIndex);
-
-  if(index1<leftChainStartIndex && index2 <rightChainStartIndex) /*no point above v on left chain or right chain*/
-    {
-      /*the topVertex is the only vertex above v*/
-      ret_leftCornerWhere = 1;
-      ret_rightCornerWhere = 1;
-    }
-  else if(index1<leftChainStartIndex ) /*index2 >= rightChainStartIndex*/
-    {
-      ret_rightCornerWhere = 2; /*on right chain*/
-      ret_rightCornerIndex = index2;
-
-      //find the minimum u on right top, either that, or top, or right[index2] is the left corner
-      Real tempMin = rightChain->getVertex(index2)[0];
-      Int tempI = index2;
-      for(i=index2-1; i>=rightChainStartIndex; i--)
-	if(rightChain->getVertex(i)[0] < tempMin)
-	  {
-	    tempMin = rightChain->getVertex(i)[0];
-	    tempI = i;
-	  }
-      //chech whether (leftGridPoint, top) intersects rightchai,
-      //if yes, use right corner as left corner
-      //if not, use top or right[tempI] as left corner
-      if(DBG_intersectChain(rightChain, rightChainStartIndex, rightChainEndIndex,
-			leftGridPoint, topVertex))
-	{
-	  ret_leftCornerWhere = 2; //rightChain
-	  ret_leftCornerIndex = index2; 
-	}
-      else if(topVertex[0] < tempMin)
-	ret_leftCornerWhere = 1; /*topvertex*/
-      else
-	{
-	  ret_leftCornerWhere = 2; //right chain
-	  ret_leftCornerIndex = tempI;
-	}
-	      
-    }
-  else if(index2< rightChainStartIndex) /*index1>=leftChainStartIndex*/
-    {
-      ret_leftCornerWhere = 0; /*left chain*/
-      ret_leftCornerIndex = index1;
-       
-      //find the maximum u on the left top section. either that or topvertex, or left[index1]  is the right corner
-      Real tempMax = leftChain->getVertex(index1)[0];
-      Int tempI = index1;
-
-      for(i=index1-1; i>=leftChainStartIndex; i--){
-
-	if(leftChain->getVertex(i)[0] > tempMax)
-	  {
-
-	    tempMax = leftChain->getVertex(i)[0];
-	    tempI = i;
-	  }
-      }
-      //check whether (rightGridPoint, top) intersects leftChain or not
-      //if yes, we use leftCorner as the right corner
-      //if not, we use either top or left[tempI] as the right corner
-      if(DBG_intersectChain(leftChain, leftChainStartIndex,leftChainEndIndex,
-			    rightGridPoint, topVertex))
-	 {
-	   ret_rightCornerWhere = 0; //left chan
-	   ret_rightCornerIndex = index1;
-	 }
-      else if(topVertex[0] > tempMax)
-	ret_rightCornerWhere = 1;//topVertex
-      else
-	{
-	  ret_rightCornerWhere = 0;//left chain
-	  ret_rightCornerIndex = tempI;
-	}
-    }
-  else /*index1>=leftChainStartIndex and index2 >=rightChainStartIndex*/
-    {
-      if(leftChain->getVertex(index1)[1] <= rightChain->getVertex(index2)[1]) /*left point below right point*/
-	{
-	  ret_leftCornerWhere = 0; /*on left chain*/
-	  ret_leftCornerIndex = index1;
-
-	  Real tempMax;
-	  Int tempI;
-
-	  tempI = index1;
-	  tempMax = leftChain->getVertex(index1)[0];
-
-	  /*find the maximum u for all the points on the left below the right point index2*/
-	  for(i=index1-1; i>= leftChainStartIndex; i--)
-	    {
-	      if(leftChain->getVertex(i)[1] > rightChain->getVertex(index2)[1])
-		break;
-
-	      if(leftChain->getVertex(i)[0]>tempMax)
-		{
-		  tempI = i;
-		  tempMax = leftChain->getVertex(i)[0];
-		}
-	    }
-	  //chek whether (rightChain(index2), rightGridPoint) intersects leftchian or not
-	  if(DBG_intersectChain(leftChain, leftChainStartIndex, leftChainEndIndex, rightGridPoint, rightChain->getVertex(index2)))
-	     {
-	       ret_rightCornerWhere = 0;
-	       ret_rightCornerIndex = index1;
-	     }
-	  else if(tempMax >= rightChain->getVertex(index2)[0] ||
-	     tempMax >= uright)
-	    {
-	      ret_rightCornerWhere = 0; /*on left Chain*/
-	      ret_rightCornerIndex = tempI;
-	    }
-	  else
-	    {
-	      ret_rightCornerWhere = 2; /*on right chain*/
-	      ret_rightCornerIndex = index2;
-	    }
-	}
-      else /*left above right*/
-	{
-	  ret_rightCornerWhere = 2; /*on the right*/
-	  ret_rightCornerIndex = index2;
-	  
-	  Real tempMin;
-	  Int tempI;
-	  
-	  tempI = index2;
-	  tempMin = rightChain->getVertex(index2)[0];
-	  
-	  /*find the minimum u for all the points on the right below the left poitn index1*/
-	  for(i=index2-1; i>= rightChainStartIndex; i--)
-	    {
-	      if( rightChain->getVertex(i)[1] > leftChain->getVertex(index1)[1])
-		break;
-	      if(rightChain->getVertex(i)[0] < tempMin)
-		{
-		  tempI = i;
-		  tempMin = rightChain->getVertex(i)[0];
-		}
-	    }
-          //check whether (leftGRidPoint,left(index1)) interesect right chain 
-	  if(DBG_intersectChain(rightChain, rightChainStartIndex, rightChainEndIndex,
-				leftGridPoint, leftChain->getVertex(index1)))
-	    {
-	      ret_leftCornerWhere = 2; //right
-	      ret_leftCornerIndex = index2;
-	    }
-	  else if(tempMin <= leftChain->getVertex(index1)[0] ||
-	     tempMin <= uleft)
-	    {
-	      ret_leftCornerWhere = 2; /* on right chain*/
-	      ret_leftCornerIndex = tempI;
-	    }
-	  else
-	    {
-	      ret_leftCornerWhere = 0; /*on left chain*/
-	      ret_leftCornerIndex = index1;
-	    }
-	}
-    }
-#ifdef MYDEBUG
-printf("***********leave findUpCorners\n");
-#endif
-}
-
-//return 1 if neck exists, 0 othewise
-Int findNeckF(vertexArray *leftChain, Int botLeftIndex,
-	      vertexArray *rightChain, Int botRightIndex,
-	      gridBoundaryChain* leftGridChain,
-	      gridBoundaryChain* rightGridChain,
-	      Int gridStartIndex,
-	      Int& neckLeft, 
-	      Int& neckRight)
-{
-/*
-printf("enter findNeckF, botleft, botright=%i,%i,gstartindex=%i\n",botLeftIndex,botRightIndex,gridStartIndex);
-printf("leftChain is\n");
-leftChain->print();
-printf("rightChain is\n");
-rightChain->print();
-*/
-
-  Int lowerGridIndex; //the grid below leftChain and rightChian vertices
-  Int i;
-  Int n_vlines = leftGridChain->get_nVlines();
-  Real v;
-  if(botLeftIndex >= leftChain->getNumElements() ||
-     botRightIndex >= rightChain->getNumElements())
-    return 0; //no neck exists
-     
-  v=min(leftChain->getVertex(botLeftIndex)[1], rightChain->getVertex(botRightIndex)[1]);  
-
- 
-
-
-  for(i=gridStartIndex; i<n_vlines; i++)
-    if(leftGridChain->get_v_value(i) <= v && 
-       leftGridChain->getUlineIndex(i)<= rightGridChain->getUlineIndex(i))
-      break;
-  
-  lowerGridIndex = i;
-
-  if(lowerGridIndex == n_vlines) //the two trm vertex are higher than all gridlines
-    return 0;
-  else 
-    {
-      Int botLeft2, botRight2;
-/*
-printf("leftGridChain->get_v_)value=%f\n",leftGridChain->get_v_value(lowerGridIndex), botLeftIndex); 
-printf("leftChain->get_vertex(0)=(%f,%f)\n", leftChain->getVertex(0)[0],leftChain->getVertex(0)[1]);
-printf("leftChain->get_vertex(1)=(%f,%f)\n", leftChain->getVertex(1)[0],leftChain->getVertex(1)[1]);
-printf("leftChain->get_vertex(2)=(%f,%f)\n", leftChain->getVertex(2)[0],leftChain->getVertex(2)[1]);
-*/
-      botLeft2 = leftChain->findIndexFirstAboveEqualGen(leftGridChain->get_v_value(lowerGridIndex), botLeftIndex, leftChain->getNumElements()-1) -1 ;
-
-/*
-printf("botLeft2=%i\n", botLeft2);
-printf("leftChain->getNumElements=%i\n", leftChain->getNumElements());
-*/
-
-      botRight2 = rightChain->findIndexFirstAboveEqualGen(leftGridChain->get_v_value(lowerGridIndex), botRightIndex, rightChain->getNumElements()-1) -1;
-      if(botRight2 < botRightIndex) botRight2=botRightIndex;
-
-      if(botLeft2 < botLeftIndex) botLeft2 = botLeftIndex;
-
-      assert(botLeft2 >= botLeftIndex);
-      assert(botRight2 >= botRightIndex);
-      //find nectLeft so that it is th erightmost vertex on letChain
-
-      Int tempI = botLeftIndex;
-      Real temp = leftChain->getVertex(tempI)[0];
-      for(i=botLeftIndex+1; i<= botLeft2; i++)
-	if(leftChain->getVertex(i)[0] > temp)
-	  {
-	    temp = leftChain->getVertex(i)[0];
-	    tempI = i;
-	  }
-      neckLeft = tempI;
-
-      tempI = botRightIndex;
-      temp = rightChain->getVertex(tempI)[0];
-      for(i=botRightIndex+1; i<= botRight2; i++)
-	if(rightChain->getVertex(i)[0] < temp)
-	  {
-	    temp = rightChain->getVertex(i)[0];
-	    tempI = i;
-	  }
-      neckRight = tempI;
-      return 1;
-    }
-}
-							
-  
-	          
-/*find i>=botLeftIndex,j>=botRightIndex so that
- *(leftChain[i], rightChain[j]) is a neck.
- */
-void findNeck(vertexArray *leftChain, Int botLeftIndex, 
-	      vertexArray *rightChain, Int botRightIndex, 
-	      Int& leftLastIndex, /*left point of the neck*/
-	      Int& rightLastIndex /*right point of the neck*/
-	      )
-{
-  assert(botLeftIndex < leftChain->getNumElements() &&
-     botRightIndex < rightChain->getNumElements());
-     
-  /*now the neck exists for sure*/
-
-  if(leftChain->getVertex(botLeftIndex)[1] <= rightChain->getVertex(botRightIndex)[1]) //left below right
-    {
-
-      leftLastIndex = botLeftIndex;
-      
-      /*find i so that rightChain[i][1] >= leftchainbotverte[1], and i+1<
-       */
-      rightLastIndex=rightChain->findIndexAboveGen(leftChain->getVertex(botLeftIndex)[1], botRightIndex+1, rightChain->getNumElements()-1);    
-    }
-  else  //left above right
-    {
-
-      rightLastIndex = botRightIndex;
-     
-      leftLastIndex = leftChain->findIndexAboveGen(rightChain->getVertex(botRightIndex)[1], 
-						  botLeftIndex+1,
-						  leftChain->getNumElements()-1);
-    }
-}
-      
-      
-
-void findLeftGridIndices(directedLine* topEdge, Int firstGridIndex, Int lastGridIndex, gridWrap* grid,  Int* ret_indices, Int* ret_innerIndices)
-{
-
-  Int i,k,isHoriz = 0;
-  Int n_ulines = grid->get_n_ulines();
-  Real uMin = grid->get_u_min();
-  Real uMax = grid->get_u_max();
-  /*
-  Real vMin = grid->get_v_min();
-  Real vMax = grid->get_v_max();
-  */
-  Real slop = 0.0, uinterc;
-
-#ifdef SHORTEN_GRID_LINE
-  //uintercBuf stores all the interction u value for each grid line
-  //notice that lastGridIndex<= firstGridIndex
-  Real *uintercBuf = (Real *) malloc (sizeof(Real) * (firstGridIndex-lastGridIndex+1));
-  assert(uintercBuf);
-#endif
-
-  /*initialization to make vtail bigger than grid->...*/
-  directedLine* dLine = topEdge;
-  Real vtail = grid->get_v_value(firstGridIndex) + 1.0; 
-  Real tempMaxU = grid->get_u_min();
-
-
-  /*for each grid line*/
-  for(k=0, i=firstGridIndex; i>=lastGridIndex; i--, k++)
-    {
-
-      Real grid_v_value = grid->get_v_value(i);
-
-      /*check whether this grid line is below the current trim edge.*/
-      if(vtail > grid_v_value)
-	{
-	  /*since the grid line is below the trim edge, we 
-	   *find the trim edge which will contain the trim line
-	   */
-	  while( (vtail=dLine->tail()[1]) > grid_v_value){
-
-	    tempMaxU = max(tempMaxU, dLine->tail()[0]);
-	    dLine = dLine -> getNext();
-	  }
-
-	  if( fabs(dLine->head()[1] - vtail) < ZERO)
-	    isHoriz = 1;
-	  else
-	    {
-	      isHoriz = 0;
-	      slop = (dLine->head()[0] - dLine->tail()[0]) / (dLine->head()[1]-vtail);
-	    }
-	}
-
-      if(isHoriz)
-	{
-	  uinterc = max(dLine->head()[0], dLine->tail()[0]);
-	}
-      else
-	{
-	  uinterc = slop * (grid_v_value - vtail) + dLine->tail()[0];
-	}
-      
-      tempMaxU = max(tempMaxU, uinterc);
-
-      if(uinterc < uMin && uinterc >= uMin - ZERO)
-	uinterc = uMin;
-      if(uinterc > uMax && uinterc <= uMax + ZERO)
-	uinterc = uMax;
-
-#ifdef SHORTEN_GRID_LINE
-      uintercBuf[k] = uinterc;
-#endif
-
-      assert(uinterc >= uMin && uinterc <= uMax);
-       if(uinterc == uMax)
-         ret_indices[k] = n_ulines-1;
-       else
-	 ret_indices[k] = (Int)(((uinterc-uMin)/(uMax - uMin)) * (n_ulines-1)) + 1;
-      if(ret_indices[k] >= n_ulines)
-	ret_indices[k] = n_ulines-1;
-
-
-      ret_innerIndices[k] = (Int)(((tempMaxU-uMin)/(uMax - uMin)) * (n_ulines-1)) + 1;
-
-      /*reinitialize tempMaxU for next grdiLine*/
-      tempMaxU = uinterc;
-    }
-#ifdef SHORTEN_GRID_LINE
-  //for each grid line, compare the left grid point with the 
-  //intersection point. If the two points are too close, then
-  //we should move the grid point one grid to the right
-  //and accordingly we should update the inner index.
-  for(k=0, i=firstGridIndex; i>=lastGridIndex; i--, k++)
-    {
-      //check gridLine i
-      //check ret_indices[k]
-      Real a = grid->get_u_value(ret_indices[k]-1);
-      Real b = grid->get_u_value(ret_indices[k]);
-      assert(uintercBuf[k] >= a && uintercBuf < b);
-      if( (b-uintercBuf[k]) <= 0.2 * (b-a)) //interc is very close to b
-	{
-	  ret_indices[k]++;
-	}
-
-      //check ret_innerIndices[k]
-      if(k>0)
-	{
-	  if(ret_innerIndices[k] < ret_indices[k-1])
-	    ret_innerIndices[k] = ret_indices[k-1];
-	  if(ret_innerIndices[k] < ret_indices[k])
-	    ret_innerIndices[k] = ret_indices[k];
-	}
-    }
-  //clean up
-  free(uintercBuf);
-#endif
-}
-
-void findRightGridIndices(directedLine* topEdge, Int firstGridIndex, Int lastGridIndex, gridWrap* grid,  Int* ret_indices, Int* ret_innerIndices)
-{
-
-  Int i,k;
-  Int n_ulines = grid->get_n_ulines();
-  Real uMin = grid->get_u_min();
-  Real uMax = grid->get_u_max();
-  /*
-  Real vMin = grid->get_v_min();
-  Real vMax = grid->get_v_max();
-  */
-  Real slop = 0.0, uinterc;
-
-#ifdef SHORTEN_GRID_LINE
-  //uintercBuf stores all the interction u value for each grid line
-  //notice that firstGridIndex >= lastGridIndex
-  Real *uintercBuf = (Real *) malloc (sizeof(Real) * (firstGridIndex-lastGridIndex+1));
-  assert(uintercBuf);
-#endif
-
-  /*initialization to make vhead bigger than grid->v_value...*/
-  directedLine* dLine = topEdge->getPrev();
-  Real vhead = dLine->tail()[1];
-  Real tempMinU = grid->get_u_max();
-
-  /*for each grid line*/
-  for(k=0, i=firstGridIndex; i>=lastGridIndex; i--, k++)
-    {
-
-      Real grid_v_value = grid->get_v_value(i);
-
-
-      /*check whether this grid line is below the current trim edge.*/
-      if(vhead >= grid_v_value)
-	{
-	  /*since the grid line is below the tail of the trim edge, we 
-	   *find the trim edge which will contain the trim line
-	   */
-	  while( (vhead=dLine->head()[1]) > grid_v_value){
-	    tempMinU = min(tempMinU, dLine->head()[0]);
-	    dLine = dLine -> getPrev();
-	  }
-
-	  /*skip the equality in the case of degenerat case: horizontal */
-	  while(dLine->head()[1] == grid_v_value)
-	    dLine = dLine->getPrev();
-	    
-	  assert( dLine->tail()[1] != dLine->head()[1]);
-	  slop = (dLine->tail()[0] - dLine->head()[0]) / (dLine->tail()[1]-dLine->head()[1]);
-	  /*
-	   if(dLine->tail()[1] == vhead)
-	     isHoriz = 1;
-	     else
-	    {
-	      isHoriz = 0;
-	      slop = (dLine->tail()[0] - dLine->head()[0]) / (dLine->tail()[1]-vhead);
-	    }
-	    */
-	}
-	uinterc = slop * (grid_v_value - dLine->head()[1]) + dLine->head()[0];
-
-      //in case unterc is outside of the grid due to floating point
-      if(uinterc < uMin)
-	uinterc = uMin;
-      else if(uinterc > uMax)
-	uinterc = uMax;
-
-#ifdef SHORTEN_GRID_LINE
-      uintercBuf[k] = uinterc;
-#endif      
-
-      tempMinU = min(tempMinU, uinterc);
-
-      assert(uinterc >= uMin && uinterc <= uMax);      
-
-      if(uinterc == uMin)
-	ret_indices[k] = 0;
-      else
-	ret_indices[k] = (int)ceil((((uinterc-uMin)/(uMax - uMin)) * (n_ulines-1))) -1;
-/*
-if(ret_indices[k] >= grid->get_n_ulines())
-  {
-  printf("ERROR3\n");
-  exit(0);
-}
-if(ret_indices[k] < 0)    
-  {
-  printf("ERROR4\n");
-  exit(0);
-}
-*/
-      ret_innerIndices[k] = (int)ceil ((((tempMinU-uMin)/(uMax - uMin)) * (n_ulines-1))) -1;
-
-      tempMinU = uinterc;
-    }
-#ifdef SHORTEN_GRID_LINE
-  //for each grid line, compare the left grid point with the 
-  //intersection point. If the two points are too close, then
-  //we should move the grid point one grid to the right
-  //and accordingly we should update the inner index.
-  for(k=0, i=firstGridIndex; i>=lastGridIndex; i--, k++)
-    {
-      //check gridLine i
-      //check ret_indices[k]
-      Real a = grid->get_u_value(ret_indices[k]);
-      Real b = grid->get_u_value(ret_indices[k]+1);
-      assert(uintercBuf[k] > a && uintercBuf <= b);
-      if( (uintercBuf[k]-a) <= 0.2 * (b-a)) //interc is very close to a
-	{
-	  ret_indices[k]--;
-	}
-
-      //check ret_innerIndices[k]
-      if(k>0)
-	{
-	  if(ret_innerIndices[k] > ret_indices[k-1])
-	    ret_innerIndices[k] = ret_indices[k-1];
-	  if(ret_innerIndices[k] > ret_indices[k])
-	    ret_innerIndices[k] = ret_indices[k];
-	}
-    }
-  //clean up
-  free(uintercBuf);
-#endif
-}
-
-
-void sampleMonoPoly(directedLine* polygon, gridWrap* grid, Int ulinear, Int vlinear, primStream* pStream, rectBlockArray* rbArray)
-{
-/*
-{
-grid->print();
-polygon->writeAllPolygons("zloutputFile");
-exit(0);
-}
-*/
-
-if(grid->get_n_ulines() == 2 ||
-   grid->get_n_vlines() == 2)
-{ 
-  if(ulinear && grid->get_n_ulines() == 2)
-    {
-      monoTriangulationFun(polygon, compV2InY, pStream);   
-      return;
-    }
-  else if(DBG_isConvex(polygon) && polygon->numEdges() >=4)
-     {
-       triangulateConvexPoly(polygon, ulinear, vlinear, pStream);
-       return;
-     }
-  else if(vlinear || DBG_is_U_direction(polygon))
-    {
-      Int n_cusps;//num interior cusps
-      Int n_edges = polygon->numEdges();
-      directedLine** cusps = (directedLine**) malloc(sizeof(directedLine*) * n_edges);
-      assert(cusps);
-      findInteriorCuspsX(polygon, n_cusps, cusps);
-
-      if(n_cusps == 0) //u_monotone
-	{
-
-	  monoTriangulationFun(polygon, compV2InX, pStream);
-
-          free(cusps);
-          return;          
-	}
-      else if(n_cusps == 1) //one interior cusp
-	{
-
-	  directedLine* new_polygon = polygonConvert(cusps[0]);
-
-	  directedLine* other = findDiagonal_singleCuspX( new_polygon);
-
-
-
-	  //<other> should NOT be null unless there are self-intersecting
-          //trim curves. In that case, we don't want to core dump, instead,
-          //we triangulate anyway, and print out error message.
-	  if(other == NULL)
-	    {
-	      monoTriangulationFun(polygon, compV2InX, pStream);
-	      free(cusps);
-	      return;
-	    }
-
-	  directedLine* ret_p1;
-	  directedLine* ret_p2;
-
-	  new_polygon->connectDiagonal_2slines(new_polygon, other, 
-					   &ret_p1,
-					   &ret_p2,
-					   new_polygon);
-
-	  monoTriangulationFun(ret_p1, compV2InX, pStream);
-	  monoTriangulationFun(ret_p2, compV2InX, pStream);
-
-	  ret_p1->deleteSinglePolygonWithSline();	      
-	  ret_p2->deleteSinglePolygonWithSline();	  
-
-          free(cusps);
-          return;
-         }
-     free(cusps);
-     }
-}
-
-  /*find the top and bottom of the polygon. It is supposed to be
-   *a V-monotone polygon
-   */
-
-  directedLine* tempV;
-  directedLine* topV;
-  directedLine* botV;
-  topV = botV = polygon;
-
-  for(tempV = polygon->getNext(); tempV != polygon; tempV = tempV->getNext())
-    {
-      if(compV2InY(topV->head(), tempV->head())<0) {
-
-	topV = tempV;
-      }
-      if(compV2InY(botV->head(), tempV->head())>0) {
-
-	botV = tempV;
-      }
-    }
-  
-  /*find the first(top) and the last (bottom) grid line which intersect the
-   *this polygon
-   */
-  Int firstGridIndex; /*the index in the grid*/
-  Int lastGridIndex;
-  firstGridIndex = (Int) ((topV->head()[1] - grid->get_v_min()) / (grid->get_v_max() - grid->get_v_min()) * (grid->get_n_vlines()-1));
-  lastGridIndex  = (Int) ((botV->head()[1] - grid->get_v_min()) / (grid->get_v_max() - grid->get_v_min()) * (grid->get_n_vlines()-1)) + 1;
-
-
-  /*find the interval inside  the polygon for each gridline*/
-  Int *leftGridIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(leftGridIndices);
-  Int *rightGridIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(rightGridIndices);
-  Int *leftGridInnerIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(leftGridInnerIndices);
-  Int *rightGridInnerIndices = (Int*) malloc(sizeof(Int) * (firstGridIndex - lastGridIndex +1));
-  assert(rightGridInnerIndices);
-
-  findLeftGridIndices(topV, firstGridIndex, lastGridIndex, grid,  leftGridIndices, leftGridInnerIndices);
-
-  findRightGridIndices(topV, firstGridIndex, lastGridIndex, grid,  rightGridIndices, rightGridInnerIndices);
-
-  gridBoundaryChain leftGridChain(grid, firstGridIndex, firstGridIndex-lastGridIndex+1, leftGridIndices, leftGridInnerIndices);
-
-  gridBoundaryChain rightGridChain(grid, firstGridIndex, firstGridIndex-lastGridIndex+1, rightGridIndices, rightGridInnerIndices);
-
-
-
-//  leftGridChain.draw();
-//  leftGridChain.drawInner();
-//  rightGridChain.draw();
-//  rightGridChain.drawInner();
-  /*(1) determine the grid boundaries (left and right).
-   *(2) process polygon  into two monotone chaines: use vertexArray
-   *(3) call sampleMonoPolyRec
-   */
-
-  /*copy the two chains into vertexArray datastructure*/
-  Int i;
-  vertexArray leftChain(20); /*this is a dynamic array*/
-  for(i=1; i<=topV->get_npoints()-2; i++) { /*the first vertex is the top vertex which doesn't belong to inc_chain*/
-    leftChain.appendVertex(topV->getVertex(i));
-  }
-  for(tempV = topV->getNext(); tempV != botV; tempV = tempV->getNext())
-    {
-      for(i=0; i<=tempV->get_npoints()-2; i++){
-	leftChain.appendVertex(tempV->getVertex(i));
-      }
-    }
-  
-  vertexArray rightChain(20);
-  for(tempV = topV->getPrev(); tempV != botV; tempV = tempV->getPrev())
-    {
-      for(i=tempV->get_npoints()-2; i>=0; i--){
-	rightChain.appendVertex(tempV->getVertex(i));
-      }
-    }
-  for(i=botV->get_npoints()-2; i>=1; i--){ 
-    rightChain.appendVertex(tempV->getVertex(i));
-  }
-
-  sampleMonoPolyRec(topV->head(),
-		    botV->head(),
-		    &leftChain,
-		    0,
-		    &rightChain,
-		    0,
-		    &leftGridChain,
-		    &rightGridChain,
-		    0,
-		    pStream,
-		    rbArray);
-
-
-  /*cleanup space*/
-  free(leftGridIndices);
-  free(rightGridIndices);
-  free(leftGridInnerIndices);
-  free(rightGridInnerIndices);
-}
-
-void sampleMonoPolyRec(
-		       Real* topVertex,
-		       Real* botVertex,
-		       vertexArray* leftChain, 
-		       Int leftStartIndex,
-		       vertexArray* rightChain,
-		       Int rightStartIndex,
-		       gridBoundaryChain* leftGridChain, 
-		       gridBoundaryChain* rightGridChain, 
-		       Int gridStartIndex,
-		       primStream* pStream,
-		       rectBlockArray* rbArray)
-{
-
-  /*find the first connected component, and the four corners.
-   */
-  Int index1, index2; /*the first and last grid line of the first connected component*/
-
-  if(topVertex[1] <= botVertex[1])
-    return;
-    
-  /*find i so that the grid line is below the top vertex*/
-  Int i=gridStartIndex;
-  while (i < leftGridChain->get_nVlines())
-    {
-      if(leftGridChain->get_v_value(i) < topVertex[1])
-	break;
-      i++;
-    }
-
-  /*find the first connected component starting with i*/
-  /*find index1 so that left_uline_index <= right_uline_index, that is, this
-   *grid line contains at least one inner grid point
-   */
-  index1=i;
-  int num_skipped_grid_lines=0;
-  while(index1 < leftGridChain->get_nVlines())
-    {
-      if(leftGridChain->getUlineIndex(index1) <= rightGridChain->getUlineIndex(index1))
-	break;
-      num_skipped_grid_lines++;
-      index1++;
-    }
-
-
-
-  if(index1 >= leftGridChain->get_nVlines()) /*no grid line exists which has inner point*/
-    {
-      /*stop recursion, ...*/
-      /*monotone triangulate it...*/
-//      printf("no grid line exists\n");      
-/*
-      monoTriangulationRecOpt(topVertex, botVertex, leftChain, leftStartIndex,
-			   rightChain, rightStartIndex, pStream);
-*/
-
-if(num_skipped_grid_lines <2)
-  {
-    monoTriangulationRecGenOpt(topVertex, botVertex, leftChain, leftStartIndex,
-			       leftChain->getNumElements()-1,
-			       rightChain, rightStartIndex, 
-			       rightChain->getNumElements()-1,
-			       pStream);
-  }
-else
-  {
-    //the optimum way to triangulate is top-down since this polygon
-    //is narrow-long.
-    monoTriangulationRec(topVertex, botVertex, leftChain, leftStartIndex,
-			 rightChain, rightStartIndex, pStream);
-  }
-
-/*
-      monoTriangulationRec(topVertex, botVertex, leftChain, leftStartIndex,
-			   rightChain, rightStartIndex, pStream);
-*/
-
-/*      monoTriangulationRecGenTBOpt(topVertex, botVertex, 
-				   leftChain, leftStartIndex, leftChain->getNumElements()-1,
-				   rightChain, rightStartIndex, rightChain->getNumElements()-1, 
-				   pStream);*/
-      
-
-
-    }
-  else
-    {
-
-      /*find index2 so that left_inner_index <= right_inner_index holds until index2*/
-      index2=index1+1;
-      if(index2 < leftGridChain->get_nVlines())
-	while(leftGridChain->getInnerIndex(index2) <= rightGridChain->getInnerIndex(index2))
-	  {
-	    index2++;
-	    if(index2 >= leftGridChain->get_nVlines())
-	      break;
-	  }
-      
-      index2--;
-      
-
-      
-      /*the neck*/
-      Int neckLeftIndex;
-      Int neckRightIndex;
-
-      /*the four corners*/
-      Int up_leftCornerWhere;
-      Int up_leftCornerIndex;
-      Int up_rightCornerWhere;
-      Int up_rightCornerIndex;
-      Int down_leftCornerWhere;
-      Int down_leftCornerIndex;
-      Int down_rightCornerWhere;
-      Int down_rightCornerIndex;
-
-      Real* tempBotVertex; /*the bottom vertex for this component*/
-      Real* nextTopVertex=NULL; /*for the recursion*/
-      Int nextLeftStartIndex=0;
-      Int nextRightStartIndex=0;
-
-      /*find the points below the grid line index2 on both chains*/
-      Int botLeftIndex = leftChain->findIndexStrictBelowGen(
-						      leftGridChain->get_v_value(index2),
-						      leftStartIndex,
-						      leftChain->getNumElements()-1);
-      Int botRightIndex = rightChain->findIndexStrictBelowGen(
-							rightGridChain->get_v_value(index2),
-							rightStartIndex,
-							rightChain->getNumElements()-1);
-      /*if either botLeftIndex>= numelements,
-       *        or botRightIndex >= numelemnet,
-       *then there is no neck exists. the bottom vertex is botVertex, 
-       */
-      if(! findNeckF(leftChain, botLeftIndex, rightChain, botRightIndex,
-		   leftGridChain, rightGridChain, index2, neckLeftIndex, neckRightIndex))
-	 /*
-      if(botLeftIndex == leftChain->getNumElements() ||
-	 botRightIndex == rightChain->getNumElements())
-	 */
-	{
-#ifdef MYDEBUG
-	  printf("neck NOT exists, botRightIndex=%i\n", botRightIndex);
-#endif
-
-	  tempBotVertex =  botVertex;
-	  nextTopVertex = botVertex;
-	  botLeftIndex = leftChain->getNumElements()-1;
-	  botRightIndex = rightChain->getNumElements()-1;
-	}
-      else /*neck exists*/
-	{
-#ifdef MYDEBUG
-	  printf("neck exists\n");
-#endif
-
-          /*
-	  findNeck(leftChain, botLeftIndex,
-		   rightChain, botRightIndex,
-		   neckLeftIndex,
-		   neckRightIndex);
-		   */
-#ifdef MYDEBUG
-printf("neck is found, neckLeftIndex=%i, neckRightIndex=%i\n", neckLeftIndex, neckRightIndex);
-glBegin(GL_LINES);
-glVertex2fv(leftChain->getVertex(neckLeftIndex));
-glVertex2fv(rightChain->getVertex(neckRightIndex));
-glEnd();
-#endif
-
-	  if(leftChain->getVertex(neckLeftIndex)[1] <= rightChain->getVertex(neckRightIndex)[1])
-	    {
-	      tempBotVertex = leftChain->getVertex(neckLeftIndex);
-	      botLeftIndex = neckLeftIndex-1;
-	      botRightIndex = neckRightIndex;
-	      nextTopVertex = rightChain->getVertex(neckRightIndex);
-	      nextLeftStartIndex = neckLeftIndex;
-	      nextRightStartIndex = neckRightIndex+1;
-	    }
-	  else
-	    {
-	      tempBotVertex = rightChain->getVertex(neckRightIndex);
-	      botLeftIndex = neckLeftIndex;
-	      botRightIndex = neckRightIndex-1;		  
-	      nextTopVertex = leftChain->getVertex(neckLeftIndex);
-	      nextLeftStartIndex = neckLeftIndex+1;
-	      nextRightStartIndex = neckRightIndex;
-	    }
-	}
-
-      findUpCorners(topVertex,
-		    leftChain,
-		    leftStartIndex, botLeftIndex,
-		    rightChain,
-		    rightStartIndex, botRightIndex,
-		    leftGridChain->get_v_value(index1),
-		    leftGridChain->get_u_value(index1),
-		    rightGridChain->get_u_value(index1),
-		    up_leftCornerWhere,
-		    up_leftCornerIndex,
-		    up_rightCornerWhere,
-		    up_rightCornerIndex);
-
-      findDownCorners(tempBotVertex,
-		      leftChain,
-		      leftStartIndex, botLeftIndex,
-		      rightChain,
-		      rightStartIndex, botRightIndex,
-		      leftGridChain->get_v_value(index2),
-		      leftGridChain->get_u_value(index2),
-		      rightGridChain->get_u_value(index2),
-		      down_leftCornerWhere,
-		      down_leftCornerIndex,
-		      down_rightCornerWhere,
-		      down_rightCornerIndex);	      
-#ifdef MYDEBUG
-      printf("find corners done, down_leftwhere=%i, down_righwhere=%i,\n",down_leftCornerWhere, down_rightCornerWhere );
-      printf("find corners done, up_leftwhere=%i, up_righwhere=%i,\n",up_leftCornerWhere, up_rightCornerWhere );
-      printf("find corners done, up_leftindex=%i, up_righindex=%i,\n",up_leftCornerIndex, up_rightCornerIndex );
-      printf("find corners done, down_leftindex=%i, down_righindex=%i,\n",down_leftCornerIndex, down_rightCornerIndex );
-#endif
-
-/*
-      drawCorners(topVertex,
-		  tempBotVertex,
-		  leftChain,
-		  rightChain,
-		  leftGridChain,
-		  rightGridChain,
-		  index1,
-		  index2,
-		  up_leftCornerWhere,
-		  up_leftCornerIndex,
-		  up_rightCornerWhere,
-		  up_rightCornerIndex,
-		  down_leftCornerWhere,
-		  down_leftCornerIndex,
-		  down_rightCornerWhere,
-		  down_rightCornerIndex);
-*/
-
-
-      sampleConnectedComp(topVertex, tempBotVertex,
-			  leftChain, 
-			  leftStartIndex, botLeftIndex,
-			  rightChain,
-			  rightStartIndex, botRightIndex,
-			  leftGridChain,
-			  rightGridChain,
-			  index1, index2,
-			  up_leftCornerWhere,
-			  up_leftCornerIndex,
-			  up_rightCornerWhere,
-			  up_rightCornerIndex,
-			  down_leftCornerWhere,
-			  down_leftCornerIndex,
-			  down_rightCornerWhere,
-			  down_rightCornerIndex,
-			  pStream,
-			  rbArray
-			  );
-
-      /*recursion*/
-
-      sampleMonoPolyRec(
-			nextTopVertex,
-			botVertex,
-			leftChain, 
-			nextLeftStartIndex,
-			rightChain,
-			nextRightStartIndex,
-			leftGridChain, 
-			rightGridChain, 
-			index2+1,
-			pStream, rbArray);
-			
-
-    }
-
-}
-
-void sampleLeftStrip(vertexArray* leftChain,
-		     Int topLeftIndex,
-		     Int botLeftIndex,
-		     gridBoundaryChain* leftGridChain,
-		     Int leftGridChainStartIndex,
-		     Int leftGridChainEndIndex,
-		     primStream* pStream
-		     )
-{
-  assert(leftChain->getVertex(topLeftIndex)[1] > leftGridChain->get_v_value(leftGridChainStartIndex));
-  assert(leftChain->getVertex(topLeftIndex+1)[1] <= leftGridChain->get_v_value(leftGridChainStartIndex));
-  assert(leftChain->getVertex(botLeftIndex)[1] <= leftGridChain->get_v_value(leftGridChainEndIndex));
-  assert(leftChain->getVertex(botLeftIndex-1)[1] > leftGridChain->get_v_value(leftGridChainEndIndex));
-
-  /*
-   *(1)find the last grid line which doesn'; pass below
-   * this first edge, sample this region: one trim edge and 
-   * possily multiple grid lines.
-   */
-  Real *upperVert, *lowerVert; /*the end points of the first trim edge*/
-  upperVert = leftChain->getVertex(topLeftIndex);
-  lowerVert = leftChain->getVertex(topLeftIndex+1);
-  
-  Int index = leftGridChainStartIndex;
-  while(leftGridChain->get_v_value(index) >= lowerVert[1]){
-    index++;
-    if(index > leftGridChainEndIndex) 
-      break;
-  }
-  index--;
-  
-  sampleLeftSingleTrimEdgeRegion(upperVert, lowerVert,
-				 leftGridChain,
-				 leftGridChainStartIndex,
-				 index,
-				 pStream);
-  sampleLeftStripRec(leftChain, topLeftIndex+1, botLeftIndex,
-		     leftGridChain, index, leftGridChainEndIndex,
-		     pStream);
-
-}
-
-void sampleLeftStripRec(vertexArray* leftChain,
-		     Int topLeftIndex,
-		     Int botLeftIndex,
-		     gridBoundaryChain* leftGridChain,
-		     Int leftGridChainStartIndex,
-		     Int leftGridChainEndIndex,
-			primStream* pStream
-		     )
-{
-  /*now top left trim vertex is below the top grid line.
-   */
-  /*stop condition: if topLeftIndex >= botLeftIndex, then stop.
-   */
-  if(topLeftIndex >= botLeftIndex) 
-    return;
-
-  /*find the last trim vertex which is above the second top grid line:
-   * index1.
-   *and sampleLeftOneGridStep(leftchain, topLeftIndex, index1, leftGridChain,
-   * leftGridChainStartIndex).
-   * index1 could be equal to topLeftIndex.
-   */
-  Real secondGridChainV = leftGridChain->get_v_value(leftGridChainStartIndex+1);
-  assert(leftGridChainStartIndex < leftGridChainEndIndex);
-  Int index1 = topLeftIndex;
-  while(leftChain->getVertex(index1)[1] > secondGridChainV)
-    index1++;
-  index1--;
-  
-  sampleLeftOneGridStep(leftChain, topLeftIndex, index1, leftGridChain, leftGridChainStartIndex, pStream);
-
-
-  /* 
-   * Let the next trim vertex be nextTrimVertIndex (which should be  
-   *  below the second grid line).
-   * Find the last grid line index2 which is above nextTrimVert.
-   * sampleLeftSingleTrimEdgeRegion(uppervert[2], lowervert[2], 
-   *                      leftGridChain, leftGridChainStartIndex+1, index2).
-   */
-  Real *uppervert, *lowervert;
-  uppervert = leftChain->getVertex(index1);
-  lowervert = leftChain->getVertex(index1+1);
-  Int index2 = leftGridChainStartIndex+1;
-
-  while(leftGridChain->get_v_value(index2) >= lowervert[1])
-    {
-      index2++;
-      if(index2 > leftGridChainEndIndex)
-	break;
-    }
-  index2--;
-  sampleLeftSingleTrimEdgeRegion(uppervert, lowervert, leftGridChain, leftGridChainStartIndex+1, index2,  pStream);
-
-   /* sampleLeftStripRec(leftChain, 
-                        nextTrimVertIndex,
-                        botLeftIndex,
-                        leftGridChain,
-			index2,
-                        leftGridChainEndIndex
-			)
-   *
-   */
-  sampleLeftStripRec(leftChain, index1+1, botLeftIndex, leftGridChain, index2, leftGridChainEndIndex, pStream);
-  
-}
-
-
-/***************begin RecF***********************/
-/* the gridlines from leftGridChainStartIndex to 
- * leftGridChainEndIndex are assumed to form a
- * connected component.
- * the trim vertex of topLeftIndex is assumed to
- * be below the first gridline, and the tim vertex
- * of botLeftIndex is assumed to be above the last
- * grid line.
- * If botLeftIndex < topLeftIndex, then no connected componeent exists, and this funcion returns without
- * outputing any triangles.
- * Otherwise botLeftIndex >= topLeftIndex, there is at least one triangle to output.
- */
-void sampleLeftStripRecF(vertexArray* leftChain,
-		     Int topLeftIndex,
-		     Int botLeftIndex,
-		     gridBoundaryChain* leftGridChain,
-		     Int leftGridChainStartIndex,
-		     Int leftGridChainEndIndex,
-			primStream* pStream
-		     )
-{
-  /*now top left trim vertex is below the top grid line.
-   */
-  /*stop condition: if topLeftIndex > botLeftIndex, then stop.
-   */
-  if(topLeftIndex > botLeftIndex) 
-    return;
-
-  /*if there is only one grid Line, return.*/
-
-  if(leftGridChainStartIndex>=leftGridChainEndIndex)
-    return;
-
-
-  assert(leftChain->getVertex(topLeftIndex)[1] <= leftGridChain->get_v_value(leftGridChainStartIndex) &&
-	 leftChain->getVertex(botLeftIndex)[1] >= leftGridChain->get_v_value(leftGridChainEndIndex));
-
-  /*firs find the first trim vertex which is below or equal to the second top grid line:
-   * index1.
-   */
-  Real secondGridChainV = leftGridChain->get_v_value(leftGridChainStartIndex+1);
-
-
-  Int index1 = topLeftIndex;
-
-  while(leftChain->getVertex(index1)[1] > secondGridChainV){
-    index1++;
-    if(index1>botLeftIndex)
-      break;
-  }
-
-  /*now leftChain->getVertex(index-1)[1] > secondGridChainV and
-   *    leftChain->getVertex(index)[1] <= secondGridChainV
-   *If equality holds, then we should include the vertex index1, otherwise we include only index1-1, to
-   *perform sampleOneGridStep.
-   */
-  if(index1>botLeftIndex) 
-    index1--;
-  else if(leftChain->getVertex(index1)[1] < secondGridChainV)
-    index1--;
-
-  /*now we have leftChain->getVertex(index1)[1] >= secondGridChainV, and 
-   *  leftChain->getVertex(index1+1)[1] <= secondGridChainV
-   */
-
-
-  sampleLeftOneGridStep(leftChain, topLeftIndex, index1, leftGridChain, leftGridChainStartIndex, pStream);
-
-
-  /*if leftChain->getVertex(index1)[1] == secondGridChainV, then we can recursively do the rest.
-   */
-  if(leftChain->getVertex(index1)[1] == secondGridChainV)
-    {
-
-      sampleLeftStripRecF(leftChain, index1, botLeftIndex,leftGridChain, leftGridChainStartIndex+1, leftGridChainEndIndex, pStream);
-    }
-  else if(index1 < botLeftIndex)
-    {
-
-      /* Otherwise, we have leftChain->getVertex(index1)[1] > secondGridChainV,
-       * let the next trim vertex be nextTrimVertIndex (which should be  strictly
-       *  below the second grid line).
-       * Find the last grid line index2 which is above nextTrimVert.
-       * sampleLeftSingleTrimEdgeRegion(uppervert[2], lowervert[2], 
-       *                      leftGridChain, leftGridChainStartIndex+1, index2).
-       */
-      Real *uppervert, *lowervert;
-      uppervert = leftChain->getVertex(index1);
-      lowervert = leftChain->getVertex(index1+1); //okay since index1<botLeftIndex
-      Int index2 = leftGridChainStartIndex+1;
-
-      
-      while(leftGridChain->get_v_value(index2) >= lowervert[1])
-	{
-	  index2++;
-	  if(index2 > leftGridChainEndIndex)
-	    break;
-	}
-      index2--;
-
-      
-      sampleLeftSingleTrimEdgeRegion(uppervert, lowervert, leftGridChain, leftGridChainStartIndex+1, index2,  pStream);
-      
-      /*recursion*/
-
-      sampleLeftStripRecF(leftChain, index1+1, botLeftIndex, leftGridChain, index2, leftGridChainEndIndex, pStream);
-    }
-  
-}
-
-/***************End RecF***********************/
-
-/*sample the left area in between one trim edge and multiple grid lines.
- * all the grid lines should be in between the two end poins of the
- *trim edge.
- */
-void sampleLeftSingleTrimEdgeRegion(Real upperVert[2], Real lowerVert[2],
-				    gridBoundaryChain* gridChain,
-				    Int beginIndex,
-				    Int endIndex,
-				    primStream* pStream)
-{
-  Int i,j,k;
-
-  vertexArray vArray(endIndex-beginIndex+1);  
-  vArray.appendVertex(gridChain->get_vertex(beginIndex));
-
-  for(k=1, i=beginIndex+1; i<=endIndex; i++, k++)
-    {
-      vArray.appendVertex(gridChain->get_vertex(i));
-
-      /*output the fan of the grid points of the (i)th and (i-1)th grid line.
-       */
-      if(gridChain->getUlineIndex(i) < gridChain->getUlineIndex(i-1))
-	{
-	  pStream->begin();	  
-	  pStream->insert(gridChain->get_vertex(i-1));
-	  for(j=gridChain->getUlineIndex(i); j<= gridChain->getUlineIndex(i-1); j++)
-	    pStream->insert(gridChain->getGrid()->get_u_value(j), gridChain->get_v_value(i));
-	  pStream->end(PRIMITIVE_STREAM_FAN);
-	}
-      else if(gridChain->getUlineIndex(i) > gridChain->getUlineIndex(i-1))
-	{
-	  pStream->begin();
-	  pStream->insert(gridChain->get_vertex(i));
-	  for(j=gridChain->getUlineIndex(i); j>= gridChain->getUlineIndex(i-1); j--)
-	    pStream->insert(gridChain->getGrid()->get_u_value(j), gridChain->get_v_value(i-1));
-	  pStream->end(PRIMITIVE_STREAM_FAN);
-	}
-      /*otherwisem, the two are equal, so there is no fan to outout*/	  
-    }
-  
-  monoTriangulation2(upperVert, lowerVert, &vArray, 0, endIndex-beginIndex, 
-		     0, /*decreasing chain*/
-		     pStream);
-}
-  
-/*return i, such that from begin to i-1 the chain is strictly u-monotone. 
- */				 
-Int findIncreaseChainFromBegin(vertexArray* chain, Int begin ,Int end)
-{
-  Int i=begin;
-  Real prevU = chain->getVertex(i)[0];
-  Real thisU;
-  for(i=begin+1; i<=end; i++){
-    thisU = chain->getVertex(i)[0];
-
-    if(prevU < thisU){
-      prevU = thisU;
-    }
-    else
-      break;
-  }
-  return i;
-}
-  
-/*check whether there is a vertex whose v value is strictly 
- *inbetween vup vbelow
- *if no middle exists return -1, else return the idnex.
- */
-Int checkMiddle(vertexArray* chain, Int begin, Int end, 
-		Real vup, Real vbelow)
-{
-  Int i;
-  for(i=begin; i<=end; i++)
-    {
-      if(chain->getVertex(i)[1] < vup && chain->getVertex(i)[1]>vbelow)
-	return i;
-    }
-  return -1;
-}
-  
-/*the degenerat case of sampleLeftOneGridStep*/
-void sampleLeftOneGridStepNoMiddle(vertexArray* leftChain,
-				   Int beginLeftIndex,
-				   Int endLeftIndex,
-				   gridBoundaryChain* leftGridChain,
-				   Int leftGridChainStartIndex,
-				   primStream* pStream)
-{
-  /*since there is no middle, there is at most one point which is on the 
-   *second grid line, there could be multiple points on the first (top)
-   *grid line.
-   */
-
-  leftGridChain->leftEndFan(leftGridChainStartIndex+1, pStream);
-
-  monoTriangulation2(leftGridChain->get_vertex(leftGridChainStartIndex),
-		     leftGridChain->get_vertex(leftGridChainStartIndex+1),
-		     leftChain,
-		     beginLeftIndex,
-		     endLeftIndex,
-		     1, //is increase chain.
-		     pStream);
-}
-
-
-
-/*sampling the left area in between two grid lines.
- */
-void sampleLeftOneGridStep(vertexArray* leftChain,
-		  Int beginLeftIndex,
-		  Int endLeftIndex,
-		  gridBoundaryChain* leftGridChain,
-		  Int leftGridChainStartIndex,
-		  primStream* pStream
-		  )
-{
-  if(checkMiddle(leftChain, beginLeftIndex, endLeftIndex, 
-		 leftGridChain->get_v_value(leftGridChainStartIndex),
-		 leftGridChain->get_v_value(leftGridChainStartIndex+1))<0)
-    
-    {
-      
-      sampleLeftOneGridStepNoMiddle(leftChain, beginLeftIndex, endLeftIndex, leftGridChain, leftGridChainStartIndex, pStream);
-      return;
-    }
-  
-  //copy into a polygon
-  {
-    directedLine* poly = NULL;
-    sampledLine* sline;
-    directedLine* dline;
-    gridWrap* grid = leftGridChain->getGrid();
-    Real vert1[2];
-    Real vert2[2];
-    Int i;
-    
-    Int innerInd = leftGridChain->getInnerIndex(leftGridChainStartIndex+1);
-    Int upperInd = leftGridChain->getUlineIndex(leftGridChainStartIndex);
-    Int lowerInd = leftGridChain->getUlineIndex(leftGridChainStartIndex+1);
-    Real upperV = leftGridChain->get_v_value(leftGridChainStartIndex);
-    Real lowerV = leftGridChain->get_v_value(leftGridChainStartIndex+1);
-
-    //the upper gridline
-    vert1[1] = vert2[1] = upperV;
-    for(i=innerInd;	i>upperInd;	i--)
-      {
-	vert1[0]=grid->get_u_value(i);
-	vert2[0]=grid->get_u_value(i-1);
-	sline = new sampledLine(vert1, vert2);
-	dline = new directedLine(INCREASING, sline);
-	if(poly == NULL)
-	  poly = dline;
-	else
-	  poly->insert(dline);
-      }
-
-    //the edge connecting upper grid with left chain
-    vert1[0] = grid->get_u_value(upperInd);
-    vert1[1] = upperV;
-    sline = new sampledLine(vert1, leftChain->getVertex(beginLeftIndex));
-    dline = new directedLine(INCREASING, sline);
-    if(poly == NULL)
-      poly = dline;
-    else
-      poly->insert(dline);    
- 
-    //the left chain
-    for(i=beginLeftIndex; i<endLeftIndex; i++)
-      {
-	sline = new sampledLine(leftChain->getVertex(i), leftChain->getVertex(i+1));
-	dline = new directedLine(INCREASING, sline);
-	poly->insert(dline);
-      }
-
-    //the edge connecting left chain with lower gridline
-    vert2[0] = grid->get_u_value(lowerInd);
-    vert2[1] = lowerV;
-    sline = new sampledLine(leftChain->getVertex(endLeftIndex), vert2);
-    dline = new directedLine(INCREASING, sline);
-    poly->insert(dline);
-
-    //the lower grid line
-    vert1[1] = vert2[1] = lowerV;
-    for(i=lowerInd; i<innerInd; i++)
-      {
-	vert1[0] = grid->get_u_value(i);
-	vert2[0] = grid->get_u_value(i+1);
-	sline = new sampledLine(vert1, vert2);
-	dline = new directedLine(INCREASING, sline);
-	poly->insert(dline);       
-      }
-
-    //the vertical grid line segement
-    vert1[0]=vert2[0] = grid->get_u_value(innerInd);
-    vert2[1]=upperV;
-    vert1[1]=lowerV;
-    sline=new sampledLine(vert1, vert2);
-    dline=new directedLine(INCREASING, sline);
-    poly->insert(dline);
-    monoTriangulationOpt(poly, pStream);
-    //cleanup
-    poly->deleteSinglePolygonWithSline();
-    return;
-  }
- 
-
-
- 
-
-  Int i;
-  if(1/*leftGridChain->getUlineIndex(leftGridChainStartIndex) >= 
-     leftGridChain->getUlineIndex(leftGridChainStartIndex+1)*/
-     ) /*the second grid line is beyond the first one to the left*/
-    {
-      /*find the maximal U-monotone chain 
-       * of endLeftIndex, endLeftIndex-1, ..., 
-       */
-      i=endLeftIndex;
-      Real prevU = leftChain->getVertex(i)[0];
-      for(i=endLeftIndex-1; i>=beginLeftIndex; i--){
-	Real thisU = leftChain->getVertex(i)[0];
-	if( prevU < thisU){
-	  prevU = thisU;
-	}
-	else 
-	  break;
-      }
-      /*from endLeftIndex to i+1 is strictly U- monotone */
-      /*if i+1==endLeftIndex and the vertex and leftchain is on the second gridline, then
-       *we should use 2 vertices on the leftchain. If we only use one (endLeftIndex), then we
-       *we would output degenerate triangles
-       */
-      if(i+1 == endLeftIndex && leftChain->getVertex(endLeftIndex)[1] == leftGridChain->get_v_value(1+leftGridChainStartIndex))
-	i--;
-
-      Int j = beginLeftIndex/*endLeftIndex*/+1;
-
-
-      if(leftGridChain->getInnerIndex(leftGridChainStartIndex+1) > leftGridChain->getUlineIndex(leftGridChainStartIndex))
-	{
-	  j = findIncreaseChainFromBegin(leftChain, beginLeftIndex, i+1/*endLeftIndex*/);
-
-	  Int temp = beginLeftIndex;
-	  /*now from begin to j-1 is strictly u-monotone*/
-	  /*if j-1 is on the first grid line, then we want to skip to the vertex which is strictly
-	   *below the grid line. This vertexmust exist since there is a 'corner turn' inbetween the two grid lines
-	   */
-	  if(j-1 == beginLeftIndex)
-	    {
-	      while(leftChain->getVertex(j-1)[1] == leftGridChain->get_v_value(leftGridChainStartIndex))
-		j++;	        
-
-	      Real vert[2];
-	      vert[0] = leftGridChain->get_u_value(leftGridChainStartIndex);
-	      vert[1] = leftGridChain->get_v_value(leftGridChainStartIndex);
-
-	      monoTriangulation2(
-				 vert/*leftChain->getVertex(beginLeftIndex)*/,
-				 leftChain->getVertex(j-1),
-				 leftChain,
-				 beginLeftIndex,
-				 j-2,
-				 1,
-				 pStream //increase chain
-				 );
-				 
-	      temp = j-1;
-	    }
-				 
-	  stripOfFanLeft(leftChain, j-1, temp/*beginLeftIndex*/, leftGridChain->getGrid(),
-			 leftGridChain->getVlineIndex(leftGridChainStartIndex),
-			 leftGridChain->getUlineIndex(leftGridChainStartIndex),
-			 leftGridChain->getInnerIndex(leftGridChainStartIndex+1),
-			 pStream,
-			 1 /*the grid line is above the trim line*/
-			 );
-	}
-      
-      stripOfFanLeft(leftChain, endLeftIndex, i+1, leftGridChain->getGrid(), 
-		     leftGridChain->getVlineIndex(leftGridChainStartIndex+1),
-		     leftGridChain->getUlineIndex(leftGridChainStartIndex+1),
-		     leftGridChain->getInnerIndex(leftGridChainStartIndex+1),
-		     pStream,
-		     0 /*the grid line is below the trim lines*/
-		     );
-      
-      /*monotone triangulate the remaining left chain togther with the
-       *two vertices on the two grid v-lines.
-       */
-      Real vert[2][2];
-      vert[0][0]=vert[1][0] = leftGridChain->getInner_u_value(leftGridChainStartIndex+1);
-      vert[0][1] = leftGridChain->get_v_value(leftGridChainStartIndex);      
-      vert[1][1] = leftGridChain->get_v_value(leftGridChainStartIndex+1);
-
-//      vertexArray right(vert, 2);
-
-      monoTriangulation2(
-			 &vert[0][0], /*top vertex */
-			 &vert[1][0], /*bottom vertex*/
-			 leftChain, 
-			 /*beginLeftIndex*/j-1,
-			 i+1,
-			 1, /*an increasing chain*/
-			 pStream);
-    }
-  else /*the second one is shorter than the first one to the left*/
-    {
-      /*find the maximal U-monotone chain of beginLeftIndex, beginLeftIndex+1,...,
-       */
-      i=beginLeftIndex;
-      Real prevU = leftChain->getVertex(i)[0];
-      for(i=beginLeftIndex+1; i<=endLeftIndex; i++){
-	Real thisU = leftChain->getVertex(i)[0];
-
-	if(prevU < thisU){
-	  prevU = thisU;
-	}
-	else
-	  break;
-      }
-      /*from beginLeftIndex to i-1 is strictly U-monotone*/
-
-
-      stripOfFanLeft(leftChain, i-1, beginLeftIndex, leftGridChain->getGrid(),
-			 leftGridChain->getVlineIndex(leftGridChainStartIndex),
-			 leftGridChain->getUlineIndex(leftGridChainStartIndex),
-			 leftGridChain->getUlineIndex(leftGridChainStartIndex+1),
-			 pStream,
-		         1 /*the grid line is above the trim lines*/
-			 );
-      /*monotone triangulate the remaining left chain together with the 
-       *two vertices on the two grid v-lines.
-       */
-      Real vert[2][2];
-      vert[0][0]=vert[1][0] = leftGridChain->get_u_value(leftGridChainStartIndex+1);
-      vert[0][1] = leftGridChain->get_v_value(leftGridChainStartIndex);      
-      vert[1][1] = leftGridChain->get_v_value(leftGridChainStartIndex+1);
-
-      vertexArray right(vert, 2);
-
-      monoTriangulation2(
-			 &vert[0][0], //top vertex 
-			 &vert[1][0], //bottom vertex
-			 leftChain, 
-			 i-1,
-			 endLeftIndex,
-			 1, /*an increase chain*/
-			 pStream);
-
-    }
-}
-  
-/*n_upper>=1
- *n_lower>=1
- */
-void triangulateXYMono(Int n_upper, Real upperVerts[][2],
-		       Int n_lower, Real lowerVerts[][2],
-		       primStream* pStream)
-{
-  Int i,j,k,l;
-  Real* leftMostV;
-
-  assert(n_upper>=1 && n_lower>=1);
-  if(upperVerts[0][0] <= lowerVerts[0][0])
-    {
-      i=1;
-      j=0;
-      leftMostV = upperVerts[0];
-    }
-  else
-    {
-      i=0;
-      j=1;
-      leftMostV = lowerVerts[0];
-    }
-  
-  while(1)
-    {
-      if(i >= n_upper) /*case1: no more in upper*/
-	{
-
-	  if(j<n_lower-1) /*at least two vertices in lower*/
-	    {
-	      pStream->begin();
-	      pStream->insert(leftMostV);
-	      while(j<n_lower){
-		pStream->insert(lowerVerts[j]);
-		j++;
-	      }
-	      pStream->end(PRIMITIVE_STREAM_FAN);
-	    }
-
-	  break;	
-	}
-      else if(j>= n_lower) /*case2: no more in lower*/
-	{
-
-	  if(i<n_upper-1) /*at least two vertices in upper*/
-	    {
-	      pStream->begin();
-	      pStream->insert(leftMostV);
-
-	      for(k=n_upper-1; k>=i; k--)
-		pStream->insert(upperVerts[k]);
-
-	      pStream->end(PRIMITIVE_STREAM_FAN);
-	    }
-
-	  break;
-	}
-      else /* case3: neither is empty, plus the leftMostV, there is at least one triangle to output*/
-	{
-
-	  if(upperVerts[i][0] <= lowerVerts[j][0])
-	    {
-	      pStream->begin();
-	      pStream->insert(lowerVerts[j]); /*the origin of this fan*/
-
-	      /*find the last k>=i such that 
-	       *upperverts[k][0] <= lowerverts[j][0]
-	       */
-	      k=i;
-	      while(k<n_upper)
-		{
-		  if(upperVerts[k][0] > lowerVerts[j][0])
-		    break;
-		  k++;
-		}
-	      k--;
-	      for(l=k; l>=i; l--)/*the reverse is for two-face lighting*/
-		{
-		  pStream->insert(upperVerts[l]);
-		}
-	      pStream->insert(leftMostV);
-
-	      pStream->end(PRIMITIVE_STREAM_FAN);
-	      //update i for next loop
-	      i = k+1;
-	      leftMostV = upperVerts[k];
-
-	    }
-	  else /*upperVerts[i][0] > lowerVerts[j][0]*/
-	    {
-	      pStream->begin();
-	      pStream->insert(upperVerts[i]);/*the origion of this fan*/
-	      pStream->insert(leftMostV);
-	      /*find the last k>=j such that
-	       *lowerverts[k][0] < upperverts[i][0]*/
-	      k=j;
-	      while(k< n_lower)
-		{
-		  if(lowerVerts[k][0] >= upperVerts[i][0])
-		    break;
-		  pStream->insert(lowerVerts[k]);
-		  k++;
-		}
-	      pStream->end(PRIMITIVE_STREAM_FAN);
-	      j=k;
-	      leftMostV = lowerVerts[j-1];
-	    }	  
-	}
-    }
-}
-		       
-
-void stripOfFanLeft(vertexArray* leftChain, 
-		    Int largeIndex,
-		    Int smallIndex,
-		    gridWrap* grid,
-		    Int vlineIndex,
-		    Int ulineSmallIndex,
-		    Int ulineLargeIndex,
-		    primStream* pStream,
-		    Int gridLineUp /*1 if the grid line is above the trim lines*/
-		     )
-{
-  assert(largeIndex >= smallIndex);
-
-  Real grid_v_value;
-  grid_v_value = grid->get_v_value(vlineIndex);
-
-  Real2* trimVerts=(Real2*) malloc(sizeof(Real2)* (largeIndex-smallIndex+1));
-  assert(trimVerts);
-
-
-  Real2* gridVerts=(Real2*) malloc(sizeof(Real2)* (ulineLargeIndex-ulineSmallIndex+1));
-  assert(gridVerts);
-
-  Int k,i;
-  if(gridLineUp) /*trim line is below grid line, so trim vertices are going right when index increases*/
-    for(k=0, i=smallIndex; i<=largeIndex; i++, k++)
-      {
-      trimVerts[k][0] = leftChain->getVertex(i)[0];
-      trimVerts[k][1] = leftChain->getVertex(i)[1];
-    }
-  else
-    for(k=0, i=largeIndex; i>=smallIndex; i--, k++)
-      {
-	trimVerts[k][0] = leftChain->getVertex(i)[0];
-	trimVerts[k][1] = leftChain->getVertex(i)[1];
-      }
-
-  for(k=0, i=ulineSmallIndex; i<= ulineLargeIndex; i++, k++)
-    {
-      gridVerts[k][0] = grid->get_u_value(i);
-      gridVerts[k][1] = grid_v_value;
-    }
-
-  if(gridLineUp)
-    triangulateXYMono(
-		      ulineLargeIndex-ulineSmallIndex+1, gridVerts,
-		      largeIndex-smallIndex+1, trimVerts,
-		      pStream);
-  else
-    triangulateXYMono(largeIndex-smallIndex+1, trimVerts,
-		      ulineLargeIndex-ulineSmallIndex+1, gridVerts,
-		      pStream);
-  free(trimVerts);
-  free(gridVerts);
-}
-
-  
-
-
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h b/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h
deleted file mode 100644
index 3a5fa6c91ba..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _SAMPLEMONOPOLY_H
-#define _SAMPLEMONOPOLY_H
-
-#include "monoTriangulation.h"
-#include "gridWrap.h"
-#include "rectBlock.h"
-
-
-void  triangulateXYMono(Int n_upper, Real upperVerts[][2],
-		       Int n_lower, Real lowerVerts[][2],
-		       primStream* pStream);
-
-void stripOfFanLeft(vertexArray* leftChain, 
-		     Int largeIndex,
-		     Int smallIndex,
-		     gridWrap* grid,
-		     Int vlineIndex,
-		     Int ulineSmallIndex,
-		     Int ulineLargeIndex,
-		     primStream* pStream,
-		    Int gridLineUp
-		     );
-void sampleLeftOneGridStep(vertexArray* leftChain,
-		  Int beginLeftIndex,
-		  Int endLeftIndex,
-		  gridBoundaryChain* leftGridChain,
-		  Int leftGridChainStartIndex,
-		  primStream* pStream
-		  );
-
-void sampleLeftSingleTrimEdgeRegion(Real upperVert[2], Real lowerVert[2],
-				    gridBoundaryChain* gridChain,
-				    Int beginIndex,
-				    Int endIndex,
-				    primStream* pStream);
-
-void sampleLeftStripRec(vertexArray* leftChain,
-		     Int topLeftIndex,
-		     Int botLeftIndex,
-		     gridBoundaryChain* leftGridChain,
-		     Int leftGridChainStartIndex,
-		     Int leftGridChainEndIndex,
-			primStream* pStream
-		     );
-
-void sampleLeftStrip(vertexArray* leftChain,
-		     Int topLeftIndex,
-		     Int botLeftIndex,
-		     gridBoundaryChain* leftGridChain,
-		     Int leftGridChainStartIndex,
-		     Int leftGridChainEndIndex,
-		     primStream* pStream
-		     );
-
-void findLeftGridIndices(directedLine* topEdge, Int firstGridIndex, Int lastGridIndex, gridWrap* grid,  Int* ret_indices, Int* ret_inner);
-
-void findRightGridIndices(directedLine* topEdge, Int firstGridIndex, Int lastGridIndex, gridWrap* grid,  Int* ret_indices, Int* ret_inner);
-
-void sampleMonoPoly(directedLine* polygon, gridWrap* grid, Int ulinear, Int vlinear, primStream *pStream, rectBlockArray* rbArray);
-
-void sampleMonoPolyRec(
-		       Real* topVertex,
-		       Real* botVertex,
-		       vertexArray* leftChain, 
-		       Int leftStartIndex,
-		       vertexArray* rightChain,
-		       Int rightStartIndex,
-		       gridBoundaryChain* leftGridChain, 
-		       gridBoundaryChain* rightGridChain, 
-		       Int gridStartIndex,
-		       primStream* pStream,
-		       rectBlockArray* rbArray
-		       );
-
-void sampleLeftStripRecF(vertexArray* leftChain,
-		     Int topLeftIndex,
-		     Int botLeftIndex,
-		     gridBoundaryChain* leftGridChain,
-		     Int leftGridChainStartIndex,
-		     Int leftGridChainEndIndex,
-			primStream* pStream
-		     );
-
-void findUpCorners(Real *topVertex, 
-		   vertexArray *leftChain, 
-		   Int leftChainStartIndex, Int leftChainEndIndex,
-		   vertexArray *rightChain, 
-		   Int rightChainStartIndex, Int rightChainEndIndex,
-		   Real v,
-		   Real uleft,
-		   Real uright,
-		   Int& ret_leftCornerWhere, 
-		   Int& ret_leftCornerIndex,
-		   Int& ret_rightCornerWhere,
-		   Int& ret_rightCornerIndex
-		   );
-void findDownCorners(Real *botVertex, 
-		   vertexArray *leftChain, Int leftChainStartIndex, Int leftChainEndIndex,
-		   vertexArray *rightChain, Int rightChainStartIndex, Int rightChainEndIndex,
-		   Real v,
-		   Real uleft,
-		   Real uright,
-		   Int& ret_leftCornerWhere,
-		   Int& ret_leftCornerIndex,
-		   Int& ret_rightCornerWhere,
-		   Int& ret_rightCornerIndex
-		   );
-void findNeck(vertexArray *leftChain, Int botLeftIndex, 
-	      vertexArray *rightChain, Int botRightIndex, 
-	      Int& leftLastIndex, /*left point of the neck*/
-	      Int& rightLastIndex /*right point of the neck*/
-	      );
-
-Int findNeckF(vertexArray *leftChain, Int botLeftIndex,
-	       vertexArray *rightChain, Int botRightIndex,
-	       gridBoundaryChain* leftGridChain,
-	       gridBoundaryChain* rightGridChain,
-	       Int gridStartIndex,
-	       Int& neckLeft, 
-	       Int& neckRight);
-
-void findTopAndBot(directedLine* polygon, 
-		   directedLine*& topV, 
-		   directedLine*& botV);
-void findGridChains(directedLine* top, directedLine* bot, 
-		    gridWrap* grid,
-		    gridBoundaryChain*& leftGridChain,
-		    gridBoundaryChain*& rightGridChain);
-void toVertexArrays(directedLine* topV, directedLine* botV, vertexArray& leftChain, vertexArray& rightChain);
-
-void drawCorners(
-		 Real* topV, Real* botV,		 
-		 vertexArray* leftChain,
-		 vertexArray* rightChain,
-		 gridBoundaryChain* leftGridChain,
-		 gridBoundaryChain* rightGridChain,
-		 Int gridIndex1,
-		 Int gridIndex2,
-		 Int leftCornerWhere,
-		 Int leftCornerIndex,
-		 Int rightCornerWhere,
-		 Int rightCornerIndex,
-		 Int bot_leftCornerWhere,
-		 Int bot_leftCornerIndex,
-		 Int bot_rightCornerWhere,
-		 Int bot_rightCornerIndex);
-
-Int checkMiddle(vertexArray* chain, Int begin, Int end, 
-		Real vup, Real vbelow);
-
-#endif
-
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc b/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
deleted file mode 100644
index 89f6c6e23fe..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
+++ /dev/null
@@ -1,182 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <math.h> //for fabs()
-#include "glimports.h"
-#include "zlassert.h"
-#include "sampledLine.h"
-
-void sampledLine::setPoint(Int i, Real p[2]) 
-{
-  points[i][0]=p[0];  
-  points[i][1]=p[1];
-}
-
-
-/*insert this single line in front of the oldList*/
-sampledLine* sampledLine::insert(sampledLine *oldList)
-{
-  next = oldList;
-  return this;
-}
-
-void sampledLine::deleteList()
-{
-  sampledLine *temp, *tempNext;
-  for(temp = this; temp != NULL; temp = tempNext)
-    {
-      tempNext = temp->next;
-      delete temp;
-    }
-}
- 
-
-/*space of points[][2] is allocated*/
-sampledLine::sampledLine(Int n_points)
-{
-  npoints = n_points;
-  points = (Real2*) malloc(sizeof(Real2) * n_points);
-  assert(points);
-  next = NULL;
-}
-
-/*space of points[][2] is allocated and 
- *points are copied
- */
-sampledLine::sampledLine(Int n_points, Real2 pts[])
-{
-  int i;
-  npoints = n_points;
-  points = (Real2*) malloc(sizeof(Real2) * n_points);
-  assert(points);
-  for(i=0; i<npoints; i++) {
-    points[i][0] = pts[i][0];
-    points[i][1] = pts[i][1];
-  }
-  next = NULL;
-}
-
-sampledLine::sampledLine(Real pt1[2], Real pt2[2])
-{
-  npoints = 2;
-  points = (Real2*) malloc(sizeof(Real2) * 2);
-  assert(points);
-  points[0][0] = pt1[0];
-  points[0][1] = pt1[1];
-  points[1][0] = pt2[0];
-  points[1][1] = pt2[1];
-  next = NULL;
-}
-
-//needs tp call init to setup
-sampledLine::sampledLine()
-{
-  npoints = 0;
-  points = NULL;
-  next = NULL;
-}
-
-//warning: ONLY pointer is copies!!!
-void sampledLine::init(Int n_points, Real2 *pts)
-{
-  npoints = n_points;
-  points = pts;
-}
-
-/*points[] is dealocated
- */
-sampledLine::~sampledLine()
-{
-  free(points);
-}
-
-void sampledLine::print()
-{
-  int i;
-  printf("npoints=%i\n", npoints);
-
-  for(i=0; i<npoints; i++){
-    printf("(%f,%f)\n", points[i][0], points[i][1]);
-  }
-
-}
-
-void sampledLine::tessellate(Real u_reso, Real v_reso)
-{
-  int i;
-
-  Int nu, nv, n;
-  nu = 1+(Int) (fabs((points[npoints-1][0] - points[0][0])) * u_reso);
-  nv = 1+(Int) (fabs((points[npoints-1][1] - points[0][1])) * v_reso);
-
-  if(nu > nv) n = nu;
-  else 
-    n = nv;
-  if(n<1)
-    n = 1;
-  //du dv could be negative  
-  Real du = (points[npoints-1][0] - points[0][0])/n;
-  Real dv = (points[npoints-1][1] - points[0][1])/n;
-  Real2 *temp = (Real2*) malloc(sizeof(Real2) * (n+1));
-  assert(temp);
-
-  Real u,v;
-  for(i=0, u=points[0][0], v=points[0][1]; i<n; i++, u+=du, v+=dv)
-    {
-      temp[i][0] = u;
-      temp[i][1] = v;
-    }
-  temp[n][0] = points[npoints-1][0];
-  temp[n][1] = points[npoints-1][1];
-
-  free(points);
-
-  npoints = n+1;
-  points = temp;
-
-}
-
-void sampledLine::tessellateAll(Real u_reso, Real v_reso)
-{
-  sampledLine* temp;
-  for(temp = this; temp != NULL; temp = temp->next)
-    {
-      temp->tessellate(u_reso, v_reso);
-    }
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/sampledLine.h b/src/glu/sgi/libnurbs/nurbtess/sampledLine.h
deleted file mode 100644
index 2cc726948ec..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/sampledLine.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _SAMPLEDLINE_H
-#define _SAMPLEDLINE_H
-
-#include "definitions.h"
-
-class sampledLine{
-  Int npoints;
-  Real2 *points;
-
-public:
-  sampledLine(Int n_points);
-  sampledLine(Int n_points, Real  pts[][2]);
-  sampledLine(Real pt1[2], Real pt2[2]);
-  sampledLine(); //special, careful about memory
-  ~sampledLine();
-
-  void init(Int n_points, Real2 *pts);//special, careful about memory
-
-  void setPoint(Int i, Real p[2]) ;
-
-  sampledLine* insert(sampledLine *nline);
-  void deleteList();
-
-  Int get_npoints() {return npoints;}
-  Real2* get_points() {return points;}
-
-  //u_reso is number of segments (may not be integer) per unit u
-  void tessellate(Real u_reso, Real v_reso);//n segments
-  void tessellateAll(Real u_reso, Real v_reso);
-
-  void print();
-  
-  sampledLine* next;
-};
-
-
-
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/searchTree.cc b/src/glu/sgi/libnurbs/nurbtess/searchTree.cc
deleted file mode 100644
index 1865755a484..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/searchTree.cc
+++ /dev/null
@@ -1,282 +0,0 @@
-/*
-** License Applicability. Except to the extent portions of this file are
-** made subject to an alternative license as permitted in the SGI Free
-** Software License B, Version 1.1 (the "License"), the contents of this
-** file are subject only to the provisions of the License. You may not use
-** this file except in compliance with the License. You may obtain a copy
-** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
-** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
-** http://oss.sgi.com/projects/FreeB
-** 
-** Note that, as provided in the License, the Software is distributed on an
-** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
-** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
-** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
-** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
-** Original Code. The Original Code is: OpenGL Sample Implementation,
-** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
-** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
-** Copyright in any portions created by third parties is as indicated
-** elsewhere herein. All Rights Reserved.
-** 
-** Additional Notice Provisions: The application programming interfaces
-** established by SGI in conjunction with the Original Code are The
-** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
-** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
-** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
-** Window System(R) (Version 1.3), released October 19, 1998. This software
-** was created using the OpenGL(R) version 1.2.1 Sample Implementation
-** published by SGI, but has not been independently verified as being
-** compliant with the OpenGL(R) version 1.2.1 Specification.
-**
-*/
-/*
-*/
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "zlassert.h"
-
-#include "searchTree.h"
-
-#define max(a,b) ((a>b)? a:b)
-
-treeNode* TreeNodeMake(void *key)
-{
-  treeNode *ret = (treeNode*) malloc(sizeof(treeNode));
-  assert(ret);
-  ret->key = key;
-  ret->parent = NULL;
-  ret->left = NULL;
-  ret->right = NULL;
-  return ret;
-}
-
-void TreeNodeDeleteSingleNode(treeNode* node)
-{
-  free(node);
-}
-
-void TreeNodeDeleteWholeTree(treeNode* node)
-{
-  if(node == NULL) return;
-  TreeNodeDeleteWholeTree(node->left);
-  TreeNodeDeleteWholeTree(node->right);
-  TreeNodeDeleteSingleNode(node);
-}
-
-void TreeNodePrint(treeNode* node, 
-		   void (*keyPrint) (void*))
-{
-  if(node ==NULL) return;
-  TreeNodePrint(node->left, keyPrint);
-  keyPrint(node->key);
-  TreeNodePrint(node->right, keyPrint);  
-}
-
-int TreeNodeDepth(treeNode* root)
-{
-  if(root == NULL) return 0;
-  else{
-    int leftdepth = TreeNodeDepth(root->left);
-    int rightdepth = TreeNodeDepth(root->right);  
-    return 1 + max(leftdepth, rightdepth);
-  }
-}
-
-/*return the node with the key.
- *NULL is returned if not found
- */
-treeNode* TreeNodeFind(treeNode* tree, void* key,
-		       int (*compkey) (void*, void*)) 	       
-{
-  if(tree == NULL) 
-    return NULL;
-  if(key == tree->key)
-    return tree;
-  else if(compkey(key, tree->key) < 0)
-    return TreeNodeFind(tree->left, key, compkey);
-  else 
-    return TreeNodeFind(tree->right, key, compkey);    
-}
-
-
-treeNode* TreeNodeInsert(treeNode* root, treeNode* newnode,
-		    int (*compkey) (void *, void *))
-{
-  treeNode *y = NULL;
-  treeNode *x = root;
-  /*going down the tree from the root.
-   *x traces the path, y is the parent of x.
-   */
-  while (x != NULL){
-    y = x;
-    if(compkey(newnode->key,x->key) < 0) /*if newnode < x*/
-      x = x->left;
-    else 
-      x = x->right;
-  }
-
-  /*now y has the property that 
-   * if newnode < y, then y->left is NULL
-   * if newnode > y, then y->right is NULL.
-   *So we want to isnert newnode to be the child of y
-   */
-  newnode->parent = y;
-  if(y == NULL) 
-    return newnode;
-  else if( compkey(newnode->key, y->key) <0)
-    {
-      y->left = newnode;
-    }
-  else
-    {
-      y->right = newnode;
-    }
-
-  return root;
-}
-    
-treeNode* TreeNodeDeleteSingleNode(treeNode* tree, treeNode* node)
-{
-  treeNode* y;
-  treeNode* x;
-  treeNode* ret;
-  if(node==NULL) return tree;
-
-  if(node->left == NULL || node->right == NULL) {
-
-    y = node;
-    if(y->left != NULL) 
-      x = y->left;
-    else
-      x = y->right;
-
-    if( x != NULL)
-      x->parent = y->parent;
-
-    if(y->parent == NULL) /*y is the root which has at most one child x*/
-      ret = x;
-    else /*y is not the root*/
-      {
-	if(y == y->parent->left) 
-	  y->parent->left = x;
-	else
-	  y->parent->right = x;
-	ret =  tree;
-      }
-  }
-  else { /*node has two children*/
-
-     y = TreeNodeSuccessor(node);
-     assert(y->left == NULL);
-
-     if(y == node->right) /*y is the right child if node*/
-       {
-	 y->parent = node->parent;
-	 y->left = node->left;
-	 node->left->parent = y;
-	 
-       }
-     else  /*y != node->right*/
-       {
-	 x = y->right;
-	 if(x!= NULL)
-	   x->parent = y->parent;
-
-	 assert(y->parent != NULL);
-	 if(y == y->parent->left) 
-	   y->parent->left = x;
-	 else
-	   y->parent->right = x;
-	 /*move y to the position of node*/
-	 y->parent = node->parent;
-	 y->left = node->left;
-	 y->right = node->right;
-	 node->left->parent = y;
-	 node->right->parent = y;
-       }
-    if(node->parent != NULL) {
-      if(node->parent->left == node)
-	node->parent->left = y;
-      else
-	node->parent->right = y;
-      ret = tree; /*the root if the tree doesn't change*/
-    }
-    else /*node->parent is NULL: node is the root*/
-      ret = y;    
-  }
-
-  /*finally free the node, and return the new root*/
-  TreeNodeDeleteSingleNode(node);
-  return ret;
-}
-     
-
-/*the minimum node in the tree rooted by node
- */
-treeNode* TreeNodeMinimum(treeNode* node)
-{
-  treeNode* temp = node;
-  if(temp == NULL) return NULL;
-  while(temp->left != NULL) {
-    temp = temp->left;
-  }
-  return temp;
-}
-
-/*the maximum node in the tree rooted by node
- */
-treeNode* TreeNodeMaximum(treeNode* node)
-{
-  treeNode* temp = node;
-  if(temp == NULL) return NULL;
-  while(temp->right != NULL) {
-    temp = temp->right;
-  }
-  return temp;
-}
-
-/*return the first node (in sorted order) which is to the right of this node
- */
-treeNode* TreeNodeSuccessor(treeNode* node)
-{
-  if(node == NULL) return NULL;
-  if(node->right != NULL)
-    return TreeNodeMinimum(node->right);
-  else{ /*node->right is NULL*/
-
-    /*find the first right-ancestor*/
-    treeNode *y = node->parent;
-    treeNode* x = node;
-    while(y != NULL && x == y->right) /*if y is a left parent of x*/
-      {
-
-	x = y;
-	y = y->parent;
-      }
-    return y;
-  }
-}
-
-/*return the first node (in sorted order) which is to the left of this node
- */
-treeNode* TreeNodePredecessor(treeNode* node)
-{
-  if(node == NULL) return NULL;
-  if(node->left != NULL)
-    return TreeNodeMaximum(node->left);
-  else{ /*node->left is NULL*/
-    /*find the first left-ancestor*/
-    treeNode *y = node->parent;
-    treeNode *x = node;
-    while(y != NULL && x == y->left) /*if y is a right parent of x*/
-      {
-	x = y;
-	y = y->parent;
-      }
-    return y;
-  }
-}
diff --git a/src/glu/sgi/libnurbs/nurbtess/searchTree.h b/src/glu/sgi/libnurbs/nurbtess/searchTree.h
deleted file mode 100644
index d5e33314bb0..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/searchTree.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-#ifndef _SEARCHTREE_H
-#define _SEARCHTREE_H
-
-typedef struct treeNode{
-  void *key;
-  struct treeNode* parent;
-  struct treeNode* left; /*children*/
-  struct treeNode* right; 
-} treeNode;
-
-treeNode* TreeNodeMake(void *key);
-void TreeNodeDeleteSingleNode(treeNode* node);
-void TreeNodeDeleteWholeTree(treeNode* node);
-void TreeNodePrint(treeNode* node, 
-		   void (*keyPrint) (void*));
-int TreeNodeDepth(treeNode* root);
-treeNode* TreeNodeMinimum(treeNode* node);
-treeNode* TreeNodeMaximum(treeNode* node);
-treeNode* TreeNodePredecessor(treeNode* node);
-treeNode* TreeNodeSuccessor(treeNode* node);
-treeNode* TreeNodeFind(treeNode* tree, void* key,
-		       int (*compkey) (void*, void*));
-
-treeNode* TreeNodeInsert(treeNode* root, treeNode* newnode,
-		    int (*comp) (void *, void *));
-treeNode* TreeNodeDeleteSingleNode(treeNode* tree, treeNode* node);
-
-
-#endif
diff --git a/src/glu/sgi/libnurbs/nurbtess/zlassert.h b/src/glu/sgi/libnurbs/nurbtess/zlassert.h
deleted file mode 100644
index b9c07325768..00000000000
--- a/src/glu/sgi/libnurbs/nurbtess/zlassert.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
- * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice including the dates of first publication and
- * either this permission notice or a reference to
- * http://oss.sgi.com/projects/FreeB/
- * shall be included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of Silicon Graphics, Inc.
- * shall not be used in advertising or otherwise to promote the sale, use or
- * other dealings in this Software without prior written authorization from
- * Silicon Graphics, Inc.
- */
-/*
-*/
-
-/*XXXblythe this file should be deleted*/
-#include <assert.h>