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-/*
-** 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);
-
-}
-
-
-
-
-
-
-
-
-
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