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diff --git a/src/glu/mesa/glu.c b/src/glu/mesa/glu.c
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+/* $Id: glu.c,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.1
+ * Copyright (C) 1995-1999  Brian Paul
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+/*
+ * $Log: glu.c,v $
+ * Revision 1.1  1999/08/19 00:55:42  jtg
+ * Initial revision
+ *
+ * Revision 1.13  1999/03/31 19:07:28  brianp
+ * added GL_EXT_abgr to extensions
+ *
+ * Revision 1.12  1999/02/06 06:12:41  brianp
+ * updated version string to 3.1
+ *
+ * Revision 1.11  1999/01/03 03:23:15  brianp
+ * now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump)
+ *
+ * Revision 1.10  1998/04/22 00:35:50  brianp
+ * changed version to 3.0
+ *
+ * Revision 1.9  1997/12/09 03:03:32  brianp
+ * changed version to 2.6
+ *
+ * Revision 1.8  1997/10/04 01:30:20  brianp
+ * changed version to 2.5
+ *
+ * Revision 1.7  1997/08/13 01:25:21  brianp
+ * changed version string to 2.4
+ *
+ * Revision 1.6  1997/07/24 01:28:44  brianp
+ * changed precompiled header symbol from PCH to PC_HEADER
+ *
+ * Revision 1.5  1997/07/13 22:59:11  brianp
+ * added const to viewport parameter of gluPickMatrix()
+ *
+ * Revision 1.4  1997/05/28 02:29:38  brianp
+ * added support for precompiled headers (PCH), inserted APIENTRY keyword
+ *
+ * Revision 1.3  1997/04/12 16:19:02  brianp
+ * changed version to 2.3
+ *
+ * Revision 1.2  1997/03/11 00:58:34  brianp
+ * changed version to 2.2
+ *
+ * Revision 1.1  1996/09/27 01:19:39  brianp
+ * Initial revision
+ *
+ */
+
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "gluP.h"
+#endif
+
+
+/*
+ * Miscellaneous utility functions
+ */
+
+
+#ifndef M_PI
+#define M_PI 3.1415926536
+#endif
+#define EPS 0.00001
+
+
+
+
+void GLAPIENTRY gluLookAt( GLdouble eyex, GLdouble eyey, GLdouble eyez,
+                         GLdouble centerx, GLdouble centery, GLdouble centerz,
+                         GLdouble upx, GLdouble upy, GLdouble upz )
+{
+   GLdouble m[16];
+   GLdouble x[3], y[3], z[3];
+   GLdouble mag;
+
+   /* Make rotation matrix */
+
+   /* Z vector */
+   z[0] = eyex - centerx;
+   z[1] = eyey - centery;
+   z[2] = eyez - centerz;
+   mag = sqrt( z[0]*z[0] + z[1]*z[1] + z[2]*z[2] );
+   if (mag) {  /* mpichler, 19950515 */
+      z[0] /= mag;
+      z[1] /= mag;
+      z[2] /= mag;
+   }
+
+   /* Y vector */
+   y[0] = upx;
+   y[1] = upy;
+   y[2] = upz;
+
+   /* X vector = Y cross Z */
+   x[0] =  y[1]*z[2] - y[2]*z[1];
+   x[1] = -y[0]*z[2] + y[2]*z[0];
+   x[2] =  y[0]*z[1] - y[1]*z[0];
+
+   /* Recompute Y = Z cross X */
+   y[0] =  z[1]*x[2] - z[2]*x[1];
+   y[1] = -z[0]*x[2] + z[2]*x[0];
+   y[2] =  z[0]*x[1] - z[1]*x[0];
+
+   /* mpichler, 19950515 */
+   /* cross product gives area of parallelogram, which is < 1.0 for
+    * non-perpendicular unit-length vectors; so normalize x, y here
+    */
+
+   mag = sqrt( x[0]*x[0] + x[1]*x[1] + x[2]*x[2] );
+   if (mag) {
+      x[0] /= mag;
+      x[1] /= mag;
+      x[2] /= mag;
+   }
+
+   mag = sqrt( y[0]*y[0] + y[1]*y[1] + y[2]*y[2] );
+   if (mag) {
+      y[0] /= mag;
+      y[1] /= mag;
+      y[2] /= mag;
+   }
+
+#define M(row,col)  m[col*4+row]
+   M(0,0) = x[0];  M(0,1) = x[1];  M(0,2) = x[2];  M(0,3) = 0.0;
+   M(1,0) = y[0];  M(1,1) = y[1];  M(1,2) = y[2];  M(1,3) = 0.0;
+   M(2,0) = z[0];  M(2,1) = z[1];  M(2,2) = z[2];  M(2,3) = 0.0;
+   M(3,0) = 0.0;   M(3,1) = 0.0;   M(3,2) = 0.0;   M(3,3) = 1.0;
+#undef M
+   glMultMatrixd( m );
+
+   /* Translate Eye to Origin */
+   glTranslated( -eyex, -eyey, -eyez );
+
+}
+
+
+
+void GLAPIENTRY gluOrtho2D( GLdouble left, GLdouble right,
+                          GLdouble bottom, GLdouble top )
+{
+   glOrtho( left, right, bottom, top, -1.0, 1.0 );
+}
+
+
+
+void GLAPIENTRY gluPerspective( GLdouble fovy, GLdouble aspect,
+                              GLdouble zNear, GLdouble zFar )
+{
+   GLdouble xmin, xmax, ymin, ymax;
+
+   ymax = zNear * tan( fovy * M_PI / 360.0 );
+   ymin = -ymax;
+
+   xmin = ymin * aspect;
+   xmax = ymax * aspect;
+
+   glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
+}
+
+
+
+void GLAPIENTRY gluPickMatrix( GLdouble x, GLdouble y,
+                             GLdouble width, GLdouble height,
+                             const GLint viewport[4] )
+{
+   GLfloat m[16];
+   GLfloat sx, sy;
+   GLfloat tx, ty;
+
+   sx = viewport[2] / width;
+   sy = viewport[3] / height;
+   tx = (viewport[2] + 2.0 * (viewport[0] - x)) / width;
+   ty = (viewport[3] + 2.0 * (viewport[1] - y)) / height;
+
+#define M(row,col)  m[col*4+row]
+   M(0,0) = sx;   M(0,1) = 0.0;  M(0,2) = 0.0;  M(0,3) = tx;
+   M(1,0) = 0.0;  M(1,1) = sy;   M(1,2) = 0.0;  M(1,3) = ty;
+   M(2,0) = 0.0;  M(2,1) = 0.0;  M(2,2) = 1.0;  M(2,3) = 0.0;
+   M(3,0) = 0.0;  M(3,1) = 0.0;  M(3,2) = 0.0;  M(3,3) = 1.0;
+#undef M
+
+   glMultMatrixf( m );
+}
+
+
+
+const GLubyte* GLAPIENTRY gluErrorString( GLenum errorCode )
+{
+   static char *tess_error[] = {
+      "missing gluEndPolygon",
+      "missing gluBeginPolygon",
+      "misoriented contour",
+      "vertex/edge intersection",
+      "misoriented or self-intersecting loops",
+      "coincident vertices",
+      "colinear vertices",
+      "intersecting edges",
+      "not coplanar contours"
+   };
+   static char *nurbs_error[] = {
+      "spline order un-supported",
+      "too few knots",
+      "valid knot range is empty",
+      "decreasing knot sequence knot",
+      "knot multiplicity greater than order of spline",
+      "endcurve() must follow bgncurve()",
+      "bgncurve() must precede endcurve()",
+      "missing or extra geometric data",
+      "can't draw pwlcurves",
+      "missing bgncurve()",
+      "missing bgnsurface()",
+      "endtrim() must precede endsurface()",
+      "bgnsurface() must precede endsurface()",
+      "curve of improper type passed as trim curve",
+      "bgnsurface() must precede bgntrim()",
+      "endtrim() must follow bgntrim()",
+      "bgntrim() must precede endtrim()",
+      "invalid or missing trim curve",
+      "bgntrim() must precede pwlcurve()",
+      "pwlcurve referenced twice",
+      "pwlcurve and nurbscurve mixed",
+      "improper usage of trim data type",
+      "nurbscurve referenced twice",
+      "nurbscurve and pwlcurve mixed",
+      "nurbssurface referenced twice",
+      "invalid property",
+      "endsurface() must follow bgnsurface()",
+      "misoriented trim curves",
+      "intersecting trim curves",
+      "UNUSED",
+      "unconnected trim curves",
+      "unknown knot error",
+      "negative vertex count encountered",
+      "negative byte-stride encounteed",
+      "unknown type descriptor",
+      "null control array or knot vector",
+      "duplicate point on pwlcurve"
+   };
+
+   /* GL Errors */
+   if (errorCode==GL_NO_ERROR) {
+      return (GLubyte *) "no error";
+   }
+   else if (errorCode==GL_INVALID_VALUE) {
+      return (GLubyte *) "invalid value";
+   }
+   else if (errorCode==GL_INVALID_ENUM) {
+      return (GLubyte *) "invalid enum";
+   }
+   else if (errorCode==GL_INVALID_OPERATION) {
+      return (GLubyte *) "invalid operation";
+   }
+   else if (errorCode==GL_STACK_OVERFLOW) {
+      return (GLubyte *) "stack overflow";
+   }
+   else if (errorCode==GL_STACK_UNDERFLOW) {
+      return (GLubyte *) "stack underflow";
+   }
+   else if (errorCode==GL_OUT_OF_MEMORY) {
+      return (GLubyte *) "out of memory";
+   }
+   /* GLU Errors */
+   else if (errorCode==GLU_NO_ERROR) {
+      return (GLubyte *) "no error";
+   }
+   else if (errorCode==GLU_INVALID_ENUM) {
+      return (GLubyte *) "invalid enum";
+   }
+   else if (errorCode==GLU_INVALID_VALUE) {
+      return (GLubyte *) "invalid value";
+   }
+   else if (errorCode==GLU_OUT_OF_MEMORY) {
+      return (GLubyte *) "out of memory";
+   }
+   else if (errorCode==GLU_INCOMPATIBLE_GL_VERSION) {
+      return (GLubyte *) "incompatible GL version";
+   }
+   else if (errorCode>=GLU_TESS_ERROR1 && errorCode<=GLU_TESS_ERROR9) {
+      return (GLubyte *) tess_error[errorCode-GLU_TESS_ERROR1];
+   }
+   else if (errorCode>=GLU_NURBS_ERROR1 && errorCode<=GLU_NURBS_ERROR37) {
+      return (GLubyte *) nurbs_error[errorCode-GLU_NURBS_ERROR1];
+   }
+   else {
+      return NULL;
+   }
+}
+
+
+
+/*
+ * New in GLU 1.1
+ */
+
+const GLubyte* GLAPIENTRY gluGetString( GLenum name )
+{
+   static char *extensions = "GL_EXT_abgr";
+   static char *version = "1.1 Mesa 3.1";
+
+   switch (name) {
+      case GLU_EXTENSIONS:
+         return (GLubyte *) extensions;
+      case GLU_VERSION:
+	 return (GLubyte *) version;
+      default:
+	 return NULL;
+   }
+}
+