Merge branch 'upstream-experimental' into debian-experimental

Conflicts:

	progs/util/README
	progs/util/glstate.c
	progs/util/glstate.h
	progs/util/sampleMakefile
	src/glu/sgi/libnurbs/interface/bezierEval.h
	src/glu/sgi/libnurbs/interface/bezierPatch.cc
	src/glu/sgi/libnurbs/interface/bezierPatch.h
	src/glu/sgi/libnurbs/interface/bezierPatchMesh.cc
	src/glu/sgi/libnurbs/interface/bezierPatchMesh.h
	src/glu/sgi/libnurbs/interface/glcurveval.cc
	src/glu/sgi/libnurbs/interface/glimports.h
	src/glu/sgi/libnurbs/interface/glinterface.cc
	src/glu/sgi/libnurbs/interface/glrenderer.h
	src/glu/sgi/libnurbs/interface/incurveeval.cc
	src/glu/sgi/libnurbs/interface/insurfeval.cc
	src/glu/sgi/libnurbs/interface/mystdio.h
	src/glu/sgi/libnurbs/interface/mystdlib.h
	src/glu/sgi/libnurbs/internals/arc.h
	src/glu/sgi/libnurbs/internals/arcsorter.cc
	src/glu/sgi/libnurbs/internals/arcsorter.h
	src/glu/sgi/libnurbs/internals/arctess.h
	src/glu/sgi/libnurbs/internals/backend.cc
	src/glu/sgi/libnurbs/internals/backend.h
	src/glu/sgi/libnurbs/internals/basiccrveval.h
	src/glu/sgi/libnurbs/internals/basicsurfeval.h
	src/glu/sgi/libnurbs/internals/bezierarc.h
	src/glu/sgi/libnurbs/internals/bin.cc
	src/glu/sgi/libnurbs/internals/bin.h
	src/glu/sgi/libnurbs/internals/bufpool.cc
	src/glu/sgi/libnurbs/internals/bufpool.h
	src/glu/sgi/libnurbs/internals/cachingeval.cc
	src/glu/sgi/libnurbs/internals/cachingeval.h
	src/glu/sgi/libnurbs/internals/ccw.cc
	src/glu/sgi/libnurbs/internals/coveandtiler.h
	src/glu/sgi/libnurbs/internals/curve.cc
	src/glu/sgi/libnurbs/internals/curve.h
	src/glu/sgi/libnurbs/internals/curvelist.cc
	src/glu/sgi/libnurbs/internals/curvelist.h
	src/glu/sgi/libnurbs/internals/curvesub.cc
	src/glu/sgi/libnurbs/internals/dataTransform.cc
	src/glu/sgi/libnurbs/internals/dataTransform.h
	src/glu/sgi/libnurbs/internals/defines.h
	src/glu/sgi/libnurbs/internals/displaylist.cc
	src/glu/sgi/libnurbs/internals/displaylist.h
	src/glu/sgi/libnurbs/internals/displaymode.h
	src/glu/sgi/libnurbs/internals/flist.cc
	src/glu/sgi/libnurbs/internals/flist.h
	src/glu/sgi/libnurbs/internals/flistsorter.cc
	src/glu/sgi/libnurbs/internals/flistsorter.h
	src/glu/sgi/libnurbs/internals/gridline.h
	src/glu/sgi/libnurbs/internals/gridtrimvertex.h
	src/glu/sgi/libnurbs/internals/gridvertex.h
	src/glu/sgi/libnurbs/internals/hull.cc
	src/glu/sgi/libnurbs/internals/hull.h
	src/glu/sgi/libnurbs/internals/intersect.cc
	src/glu/sgi/libnurbs/internals/jarcloc.h
	src/glu/sgi/libnurbs/internals/knotvector.h
	src/glu/sgi/libnurbs/internals/mapdesc.cc
	src/glu/sgi/libnurbs/internals/mapdesc.h
	src/glu/sgi/libnurbs/internals/mapdescv.cc
	src/glu/sgi/libnurbs/internals/maplist.cc
	src/glu/sgi/libnurbs/internals/maplist.h
	src/glu/sgi/libnurbs/internals/mesher.cc
	src/glu/sgi/libnurbs/internals/mesher.h
	src/glu/sgi/libnurbs/internals/monoTriangulationBackend.cc
	src/glu/sgi/libnurbs/internals/monotonizer.cc
	src/glu/sgi/libnurbs/internals/monotonizer.h
	src/glu/sgi/libnurbs/internals/myassert.h
	src/glu/sgi/libnurbs/internals/mycode.cc
	src/glu/sgi/libnurbs/internals/mystring.h
	src/glu/sgi/libnurbs/internals/nurbsconsts.h
	src/glu/sgi/libnurbs/internals/nurbstess.cc
	src/glu/sgi/libnurbs/internals/patch.cc
	src/glu/sgi/libnurbs/internals/patch.h
	src/glu/sgi/libnurbs/internals/patchlist.cc
	src/glu/sgi/libnurbs/internals/patchlist.h
	src/glu/sgi/libnurbs/internals/pwlarc.h
	src/glu/sgi/libnurbs/internals/quilt.cc
	src/glu/sgi/libnurbs/internals/quilt.h
	src/glu/sgi/libnurbs/internals/reader.cc
	src/glu/sgi/libnurbs/internals/reader.h
	src/glu/sgi/libnurbs/internals/renderhints.cc
	src/glu/sgi/libnurbs/internals/renderhints.h
	src/glu/sgi/libnurbs/internals/simplemath.h
	src/glu/sgi/libnurbs/internals/slicer.cc
	src/glu/sgi/libnurbs/internals/slicer.h
	src/glu/sgi/libnurbs/internals/sorter.cc
	src/glu/sgi/libnurbs/internals/sorter.h
	src/glu/sgi/libnurbs/internals/splitarcs.cc
	src/glu/sgi/libnurbs/internals/subdivider.h
	src/glu/sgi/libnurbs/internals/tobezier.cc
	src/glu/sgi/libnurbs/internals/trimline.cc
	src/glu/sgi/libnurbs/internals/trimline.h
	src/glu/sgi/libnurbs/internals/trimregion.cc
	src/glu/sgi/libnurbs/internals/trimregion.h
	src/glu/sgi/libnurbs/internals/trimvertex.h
	src/glu/sgi/libnurbs/internals/trimvertpool.cc
	src/glu/sgi/libnurbs/internals/trimvertpool.h
	src/glu/sgi/libnurbs/internals/types.h
	src/glu/sgi/libnurbs/internals/uarray.cc
	src/glu/sgi/libnurbs/internals/uarray.h
	src/glu/sgi/libnurbs/internals/varray.cc
	src/glu/sgi/libnurbs/internals/varray.h
	src/glu/sgi/libnurbs/nurbtess/definitions.h
	src/glu/sgi/libnurbs/nurbtess/directedLine.h
	src/glu/sgi/libnurbs/nurbtess/glimports.h
	src/glu/sgi/libnurbs/nurbtess/gridWrap.cc
	src/glu/sgi/libnurbs/nurbtess/gridWrap.h
	src/glu/sgi/libnurbs/nurbtess/monoChain.cc
	src/glu/sgi/libnurbs/nurbtess/monoChain.h
	src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc
	src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h
	src/glu/sgi/libnurbs/nurbtess/mystdio.h
	src/glu/sgi/libnurbs/nurbtess/mystdlib.h
	src/glu/sgi/libnurbs/nurbtess/partitionX.cc
	src/glu/sgi/libnurbs/nurbtess/partitionX.h
	src/glu/sgi/libnurbs/nurbtess/partitionY.cc
	src/glu/sgi/libnurbs/nurbtess/partitionY.h
	src/glu/sgi/libnurbs/nurbtess/polyDBG.h
	src/glu/sgi/libnurbs/nurbtess/polyUtil.cc
	src/glu/sgi/libnurbs/nurbtess/polyUtil.h
	src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc
	src/glu/sgi/libnurbs/nurbtess/primitiveStream.h
	src/glu/sgi/libnurbs/nurbtess/quicksort.cc
	src/glu/sgi/libnurbs/nurbtess/quicksort.h
	src/glu/sgi/libnurbs/nurbtess/rectBlock.cc
	src/glu/sgi/libnurbs/nurbtess/rectBlock.h
	src/glu/sgi/libnurbs/nurbtess/sampleComp.cc
	src/glu/sgi/libnurbs/nurbtess/sampleComp.h
	src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc
	src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h
	src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc
	src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h
	src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc
	src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h
	src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc
	src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h
	src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
	src/glu/sgi/libnurbs/nurbtess/sampledLine.h
	src/glu/sgi/libnurbs/nurbtess/searchTree.cc
	src/glu/sgi/libnurbs/nurbtess/searchTree.h
	src/glu/sgi/libnurbs/nurbtess/zlassert.h
	src/glu/sgi/libtess/README
	src/glu/sgi/libtess/alg-outline
	src/glu/sgi/libtess/dict-list.h
	src/glu/sgi/libtess/dict.c
	src/glu/sgi/libtess/dict.h
	src/glu/sgi/libtess/geom.c
	src/glu/sgi/libtess/memalloc.c
	src/glu/sgi/libtess/memalloc.h
	src/glu/sgi/libtess/mesh.c
	src/glu/sgi/libtess/mesh.h
	src/glu/sgi/libtess/normal.h
	src/glu/sgi/libtess/priorityq-heap.c
	src/glu/sgi/libtess/priorityq-heap.h
	src/glu/sgi/libtess/priorityq-sort.h
	src/glu/sgi/libtess/priorityq.c
	src/glu/sgi/libtess/priorityq.h
	src/glu/sgi/libtess/render.c
	src/glu/sgi/libtess/render.h
	src/glu/sgi/libtess/sweep.h
	src/glu/sgi/libtess/tess.h
	src/glu/sgi/libtess/tessmono.c
	src/glu/sgi/libtess/tessmono.h
	src/glu/sgi/libutil/error.c
	src/glu/sgi/libutil/glue.c
	src/glu/sgi/libutil/gluint.h
	src/glu/sgi/libutil/project.c
	src/glu/sgi/libutil/registry.c

1 files changed, 407 insertions, 0 deletions

diff --git a/src/glu/mini/tesselat.c b/src/glu/mini/tesselat.c
new file mode 100644
index 00000000000..a1102e6e5a6
--- /dev/null
+++ b/src/glu/mini/tesselat.c
@@ -0,0 +1,407 @@
+/* $Id: tesselat.c,v 1.2 2003/08/22 20:11:43 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.3
+ * Copyright (C) 1995-2000  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.
+ */
+
+
+/*
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
+ */
+
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include <stdlib.h>
+#include <math.h>
+#include "tess.h"
+#endif
+
+
+
+static GLboolean edge_flag;
+
+static void emit_triangle(GLUtriangulatorObj *, tess_vertex *,
+			  tess_vertex *, tess_vertex *);
+
+static void emit_triangle_with_edge_flag(GLUtriangulatorObj *,
+					 tess_vertex *, GLboolean,
+					 tess_vertex *, GLboolean,
+					 tess_vertex *, GLboolean);
+
+static GLdouble
+twice_the_triangle_area(tess_vertex * va, tess_vertex * vb, tess_vertex * vc)
+{
+   return (vb->x - va->x) * (vc->y - va->y) - (vb->y - va->y) * (vc->x -
+								 va->x);
+}
+
+static GLboolean
+left(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
+{
+   if (A * x + B * y + C > -EPSILON)
+      return GL_TRUE;
+   else
+      return GL_FALSE;
+}
+
+static GLboolean
+right(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
+{
+   if (A * x + B * y + C < EPSILON)
+      return GL_TRUE;
+   else
+      return GL_FALSE;
+}
+
+static GLint
+convex_ccw(tess_vertex * va,
+	   tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
+{
+   GLdouble d;
+
+   d = twice_the_triangle_area(va, vb, vc);
+
+   if (d > EPSILON) {
+      return 1;
+   }
+   else if (d < -EPSILON) {
+      return 0;
+   }
+   else {
+      return -1;
+   }
+}
+
+static GLint
+convex_cw(tess_vertex * va,
+	  tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
+{
+   GLdouble d;
+
+   d = twice_the_triangle_area(va, vb, vc);
+
+   if (d < -EPSILON) {
+      return 1;
+   }
+   else if (d > EPSILON) {
+      return 0;
+   }
+   else {
+      return -1;
+   }
+}
+
+static GLboolean
+diagonal_ccw(tess_vertex * va,
+	     tess_vertex * vb,
+	     GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+   tess_vertex *vc = va->next, *vertex, *shadow_vertex;
+   struct
+   {
+      GLdouble A, B, C;
+   }
+   ac, cb, ba;
+   GLdouble x, y;
+
+   GLint res = convex_ccw(va, vc, vb, tobj);
+   if (res == 0)
+      return GL_FALSE;
+   if (res == -1)
+      return GL_TRUE;
+
+   ba.A = vb->y - va->y;
+   ba.B = va->x - vb->x;
+   ba.C = -ba.A * va->x - ba.B * va->y;
+   ac.A = va->y - vc->y;
+   ac.B = vc->x - va->x;
+   ac.C = -ac.A * vc->x - ac.B * vc->y;
+   cb.A = vc->y - vb->y;
+   cb.B = vb->x - vc->x;
+   cb.C = -cb.A * vb->x - cb.B * vb->y;
+   for (vertex = vb->next; vertex != va; vertex = vertex->next) {
+      shadow_vertex = vertex->shadow_vertex;
+      if (shadow_vertex != NULL &&
+	  (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
+	 continue;
+      x = vertex->x;
+      y = vertex->y;
+      if (left(ba.A, ba.B, ba.C, x, y) &&
+	  left(ac.A, ac.B, ac.C, x, y) && left(cb.A, cb.B, cb.C, x, y))
+	 return GL_FALSE;
+   }
+   return GL_TRUE;
+}
+
+static GLboolean
+diagonal_cw(tess_vertex * va,
+	    tess_vertex * vb,
+	    GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+   tess_vertex *vc = va->next, *vertex, *shadow_vertex;
+   struct
+   {
+      GLdouble A, B, C;
+   }
+   ac, cb, ba;
+   GLdouble x, y;
+
+   GLint res = convex_cw(va, vc, vb, tobj);
+   if (res == 0)
+      return GL_FALSE;
+   if (res == -1)
+      return GL_TRUE;
+
+   ba.A = vb->y - va->y;
+   ba.B = va->x - vb->x;
+   ba.C = -ba.A * va->x - ba.B * va->y;
+   ac.A = va->y - vc->y;
+   ac.B = vc->x - va->x;
+   ac.C = -ac.A * vc->x - ac.B * vc->y;
+   cb.A = vc->y - vb->y;
+   cb.B = vb->x - vc->x;
+   cb.C = -cb.A * vb->x - cb.B * vb->y;
+   for (vertex = vb->next; vertex != va; vertex = vertex->next) {
+      shadow_vertex = vertex->shadow_vertex;
+      if (shadow_vertex != NULL &&
+	  (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
+	 continue;
+      x = vertex->x;
+      y = vertex->y;
+      if (right(ba.A, ba.B, ba.C, x, y) &&
+	  right(ac.A, ac.B, ac.C, x, y) && right(cb.A, cb.B, cb.C, x, y))
+	 return GL_FALSE;
+   }
+   return GL_TRUE;
+}
+
+static void
+clip_ear(GLUtriangulatorObj * tobj, tess_vertex * v, tess_contour * contour)
+{
+   emit_triangle(tobj, v->previous, v, v->next);
+   /* the first in the list */
+   if (contour->vertices == v) {
+      contour->vertices = v->next;
+      contour->last_vertex->next = v->next;
+      v->next->previous = contour->last_vertex;
+   }
+   else
+      /* the last ? */
+   if (contour->last_vertex == v) {
+      contour->vertices->previous = v->previous;
+      v->previous->next = v->next;
+      contour->last_vertex = v->previous;
+   }
+   else {
+      v->next->previous = v->previous;
+      v->previous->next = v->next;
+   }
+   free(v);
+   --(contour->vertex_cnt);
+}
+
+static void
+clip_ear_with_edge_flag(GLUtriangulatorObj * tobj,
+			tess_vertex * v, tess_contour * contour)
+{
+   emit_triangle_with_edge_flag(tobj, v->previous, v->previous->edge_flag,
+				v, v->edge_flag, v->next, GL_FALSE);
+   v->previous->edge_flag = GL_FALSE;
+   /* the first in the list */
+   if (contour->vertices == v) {
+      contour->vertices = v->next;
+      contour->last_vertex->next = v->next;
+      v->next->previous = contour->last_vertex;
+   }
+   else
+      /* the last ? */
+   if (contour->last_vertex == v) {
+      contour->vertices->previous = v->previous;
+      v->previous->next = v->next;
+      contour->last_vertex = v->previous;
+   }
+   else {
+      v->next->previous = v->previous;
+      v->previous->next = v->next;
+   }
+   free(v);
+   --(contour->vertex_cnt);
+}
+
+static void
+triangulate_ccw(GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+   tess_vertex *vertex;
+   GLuint vertex_cnt = contour->vertex_cnt;
+
+   while (vertex_cnt > 3) {
+      vertex = contour->vertices;
+      while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
+	     GL_FALSE && tobj->error == GLU_NO_ERROR)
+	 vertex = vertex->next;
+      if (tobj->error != GLU_NO_ERROR)
+	 return;
+      clip_ear(tobj, vertex->next, contour);
+      --vertex_cnt;
+   }
+}
+
+static void
+triangulate_cw(GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+   tess_vertex *vertex;
+   GLuint vertex_cnt = contour->vertex_cnt;
+
+   while (vertex_cnt > 3) {
+      vertex = contour->vertices;
+      while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
+	     GL_FALSE && tobj->error == GLU_NO_ERROR)
+	 vertex = vertex->next;
+      if (tobj->error != GLU_NO_ERROR)
+	 return;
+      clip_ear(tobj, vertex->next, contour);
+      --vertex_cnt;
+   }
+}
+
+static void
+triangulate_ccw_with_edge_flag(GLUtriangulatorObj * tobj,
+			       tess_contour * contour)
+{
+   tess_vertex *vertex;
+   GLuint vertex_cnt = contour->vertex_cnt;
+
+   while (vertex_cnt > 3) {
+      vertex = contour->vertices;
+      while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
+	     GL_FALSE && tobj->error == GLU_NO_ERROR)
+	 vertex = vertex->next;
+      if (tobj->error != GLU_NO_ERROR)
+	 return;
+      clip_ear_with_edge_flag(tobj, vertex->next, contour);
+      --vertex_cnt;
+   }
+}
+
+static void
+triangulate_cw_with_edge_flag(GLUtriangulatorObj * tobj,
+			      tess_contour * contour)
+{
+   tess_vertex *vertex;
+   GLuint vertex_cnt = contour->vertex_cnt;
+
+   while (vertex_cnt > 3) {
+      vertex = contour->vertices;
+      while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
+	     GL_FALSE && tobj->error == GLU_NO_ERROR)
+	 vertex = vertex->next;
+      if (tobj->error != GLU_NO_ERROR)
+	 return;
+      clip_ear_with_edge_flag(tobj, vertex->next, contour);
+      --vertex_cnt;
+   }
+}
+
+void
+tess_tesselate(GLUtriangulatorObj * tobj)
+{
+   tess_contour *contour;
+
+   for (contour = tobj->contours; contour != NULL; contour = contour->next) {
+      if (contour->orientation == GLU_CCW) {
+	 triangulate_ccw(tobj, contour);
+      }
+      else {
+	 triangulate_cw(tobj, contour);
+      }
+      if (tobj->error != GLU_NO_ERROR)
+	 return;
+
+      /* emit the last triangle */
+      emit_triangle(tobj, contour->vertices, contour->vertices->next,
+		    contour->vertices->next->next);
+   }
+}
+
+void
+tess_tesselate_with_edge_flag(GLUtriangulatorObj * tobj)
+{
+   tess_contour *contour;
+
+   edge_flag = GL_TRUE;
+   /* first callback with edgeFlag set to GL_TRUE */
+   (tobj->callbacks.edgeFlag) (GL_TRUE);
+
+   for (contour = tobj->contours; contour != NULL; contour = contour->next) {
+      if (contour->orientation == GLU_CCW)
+	 triangulate_ccw_with_edge_flag(tobj, contour);
+      else
+	 triangulate_cw_with_edge_flag(tobj, contour);
+      if (tobj->error != GLU_NO_ERROR)
+	 return;
+      /* emit the last triangle */
+      emit_triangle_with_edge_flag(tobj, contour->vertices,
+				   contour->vertices->edge_flag,
+				   contour->vertices->next,
+				   contour->vertices->next->edge_flag,
+				   contour->vertices->next->next,
+				   contour->vertices->next->next->edge_flag);
+   }
+}
+
+static void
+emit_triangle(GLUtriangulatorObj * tobj,
+	      tess_vertex * v1, tess_vertex * v2, tess_vertex * v3)
+{
+   (tobj->callbacks.begin) (GL_TRIANGLES);
+   (tobj->callbacks.vertex) (v1->data);
+   (tobj->callbacks.vertex) (v2->data);
+   (tobj->callbacks.vertex) (v3->data);
+   (tobj->callbacks.end) ();
+}
+
+static void
+emit_triangle_with_edge_flag(GLUtriangulatorObj * tobj,
+			     tess_vertex * v1,
+			     GLboolean edge_flag1,
+			     tess_vertex * v2,
+			     GLboolean edge_flag2,
+			     tess_vertex * v3, GLboolean edge_flag3)
+{
+   (tobj->callbacks.begin) (GL_TRIANGLES);
+   if (edge_flag1 != edge_flag) {
+      edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
+      (tobj->callbacks.edgeFlag) (edge_flag);
+   }
+   (tobj->callbacks.vertex) (v1->data);
+   if (edge_flag2 != edge_flag) {
+      edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
+      (tobj->callbacks.edgeFlag) (edge_flag);
+   }
+   (tobj->callbacks.vertex) (v2->data);
+   if (edge_flag3 != edge_flag) {
+      edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
+      (tobj->callbacks.edgeFlag) (edge_flag);
+   }
+   (tobj->callbacks.vertex) (v3->data);
+   (tobj->callbacks.end) ();
+}