svn merge ^/branches/released . --username marha

1 files changed, 371 insertions, 0 deletions

diff --git a/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc
new file mode 100644
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+++ b/mesalib/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc
@@ -0,0 +1,371 @@
+/*
+** 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);
+		     
+}
+
+
+
+
+
+
+
+
+