mesa xkeyboard-config git update 3 sep 2012

43 files changed, 0 insertions, 14029 deletions

diff --git a/mesalib/src/glu/sgi/libnurbs/nurbtess/definitions.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/definitions.h
deleted file mode 100644
index 962921da1..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/directedLine.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/directedLine.cc
deleted file mode 100644
index d942db728..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/directedLine.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/directedLine.h
deleted file mode 100644
index 4ed0128ca..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/glimports.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/glimports.h
deleted file mode 100644
index 6e69feb40..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc
deleted file mode 100644
index 3c92039ba..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/gridWrap.h
deleted file mode 100644
index b6428484f..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/monoChain.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/monoChain.cc
deleted file mode 100644
index cb28129ad..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/monoChain.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/monoChain.h
deleted file mode 100644
index 999f16319..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.cc
deleted file mode 100644
index 8391205bf..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h
deleted file mode 100644
index 6877a59c2..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc
deleted file mode 100644
index 8e8d49dda..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h
deleted file mode 100644
index f78b8f402..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/mystdio.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/mystdio.h
deleted file mode 100644
index a394e0ff9..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/mystdlib.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/mystdlib.h
deleted file mode 100644
index ab7a3b273..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.cc
deleted file mode 100644
index e25e30b0f..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionX.h
deleted file mode 100644
index 69f2b2df2..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionY.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionY.cc
deleted file mode 100644
index e097461ac..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionY.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/partitionY.h
deleted file mode 100644
index 5570c183d..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/polyDBG.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/polyDBG.cc
deleted file mode 100644
index 4d04df73f..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/polyDBG.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/polyDBG.h
deleted file mode 100644
index 74843d888..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/polyUtil.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/polyUtil.cc
deleted file mode 100644
index f9a27f402..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/polyUtil.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/polyUtil.h
deleted file mode 100644
index 1ca2ebcc0..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc
deleted file mode 100644
index dfdbd4e84..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/primitiveStream.h
deleted file mode 100644
index b4174f146..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/quicksort.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/quicksort.cc
deleted file mode 100644
index 9d0b290b3..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/quicksort.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/quicksort.h
deleted file mode 100644
index 3a8dcd6a2..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc
deleted file mode 100644
index f457b1573..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/rectBlock.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/rectBlock.h
deleted file mode 100644
index 8dbd7eb81..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc
deleted file mode 100644
index 861c71bb3..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleComp.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleComp.h
deleted file mode 100644
index a3c179025..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc
deleted file mode 100644
index 2e70f8393..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h
deleted file mode 100644
index 7b982794c..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc
deleted file mode 100644
index d01e50018..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h
deleted file mode 100644
index 4670b87ca..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc
deleted file mode 100644
index 951e937c4..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h
deleted file mode 100644
index 95598d63a..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc
deleted file mode 100644
index 051f24108..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h
deleted file mode 100644
index 3a5fa6c91..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc
deleted file mode 100644
index 89f6c6e23..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampledLine.h
deleted file mode 100644
index 2cc726948..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/searchTree.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/searchTree.cc
deleted file mode 100644
index 1865755a4..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/searchTree.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/searchTree.h
deleted file mode 100644
index d5e33314b..000000000
--- a/mesalib/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/mesalib/src/glu/sgi/libnurbs/nurbtess/zlassert.h b/mesalib/src/glu/sgi/libnurbs/nurbtess/zlassert.h
deleted file mode 100644
index b9c073257..000000000
--- a/mesalib/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>