diff options
Diffstat (limited to 'src/glu/sgi/libnurbs/nurbtess')
43 files changed, 0 insertions, 14029 deletions
diff --git a/src/glu/sgi/libnurbs/nurbtess/definitions.h b/src/glu/sgi/libnurbs/nurbtess/definitions.h deleted file mode 100644 index 962921da10d..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/directedLine.cc b/src/glu/sgi/libnurbs/nurbtess/directedLine.cc deleted file mode 100644 index d942db7287e..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/directedLine.h b/src/glu/sgi/libnurbs/nurbtess/directedLine.h deleted file mode 100644 index 4ed0128ca6b..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/glimports.h b/src/glu/sgi/libnurbs/nurbtess/glimports.h deleted file mode 100644 index 6e69feb405e..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc b/src/glu/sgi/libnurbs/nurbtess/gridWrap.cc deleted file mode 100644 index 3c92039bae0..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/gridWrap.h b/src/glu/sgi/libnurbs/nurbtess/gridWrap.h deleted file mode 100644 index b6428484f02..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/monoChain.cc b/src/glu/sgi/libnurbs/nurbtess/monoChain.cc deleted file mode 100644 index cb28129adfb..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/monoChain.h b/src/glu/sgi/libnurbs/nurbtess/monoChain.h deleted file mode 100644 index 999f1631902..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.cc b/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.cc deleted file mode 100644 index 8391205bf7c..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h b/src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h deleted file mode 100644 index 6877a59c27a..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc b/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.cc deleted file mode 100644 index 8e8d49dda70..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h b/src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h deleted file mode 100644 index f78b8f402e3..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/mystdio.h b/src/glu/sgi/libnurbs/nurbtess/mystdio.h deleted file mode 100644 index a394e0ff95d..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/mystdlib.h b/src/glu/sgi/libnurbs/nurbtess/mystdlib.h deleted file mode 100644 index ab7a3b273a3..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/partitionX.cc b/src/glu/sgi/libnurbs/nurbtess/partitionX.cc deleted file mode 100644 index e25e30b0f39..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/partitionX.h b/src/glu/sgi/libnurbs/nurbtess/partitionX.h deleted file mode 100644 index 69f2b2df212..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/partitionY.cc b/src/glu/sgi/libnurbs/nurbtess/partitionY.cc deleted file mode 100644 index e097461ac5e..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/partitionY.h b/src/glu/sgi/libnurbs/nurbtess/partitionY.h deleted file mode 100644 index 5570c183d79..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/polyDBG.cc b/src/glu/sgi/libnurbs/nurbtess/polyDBG.cc deleted file mode 100644 index 4d04df73f69..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/polyDBG.h b/src/glu/sgi/libnurbs/nurbtess/polyDBG.h deleted file mode 100644 index 74843d88879..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/polyUtil.cc b/src/glu/sgi/libnurbs/nurbtess/polyUtil.cc deleted file mode 100644 index f9a27f402ca..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/polyUtil.h b/src/glu/sgi/libnurbs/nurbtess/polyUtil.h deleted file mode 100644 index 1ca2ebcc074..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc b/src/glu/sgi/libnurbs/nurbtess/primitiveStream.cc deleted file mode 100644 index dfdbd4e8448..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/primitiveStream.h b/src/glu/sgi/libnurbs/nurbtess/primitiveStream.h deleted file mode 100644 index b4174f1466f..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/quicksort.cc b/src/glu/sgi/libnurbs/nurbtess/quicksort.cc deleted file mode 100644 index 9d0b290b393..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/quicksort.h b/src/glu/sgi/libnurbs/nurbtess/quicksort.h deleted file mode 100644 index 3a8dcd6a2cf..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc b/src/glu/sgi/libnurbs/nurbtess/rectBlock.cc deleted file mode 100644 index f457b157336..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/rectBlock.h b/src/glu/sgi/libnurbs/nurbtess/rectBlock.h deleted file mode 100644 index 8dbd7eb819d..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc b/src/glu/sgi/libnurbs/nurbtess/sampleComp.cc deleted file mode 100644 index 861c71bb380..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleComp.h b/src/glu/sgi/libnurbs/nurbtess/sampleComp.h deleted file mode 100644 index a3c1790254e..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc b/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.cc deleted file mode 100644 index 2e70f839363..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h b/src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h deleted file mode 100644 index 7b982794c04..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc b/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.cc deleted file mode 100644 index d01e50018bf..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h b/src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h deleted file mode 100644 index 4670b87ca80..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc b/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.cc deleted file mode 100644 index 951e937c45f..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h b/src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h deleted file mode 100644 index 95598d63a8b..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc b/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.cc deleted file mode 100644 index 051f2410834..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h b/src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h deleted file mode 100644 index 3a5fa6c91ba..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc b/src/glu/sgi/libnurbs/nurbtess/sampledLine.cc deleted file mode 100644 index 89f6c6e23fe..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/sampledLine.h b/src/glu/sgi/libnurbs/nurbtess/sampledLine.h deleted file mode 100644 index 2cc726948ec..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/searchTree.cc b/src/glu/sgi/libnurbs/nurbtess/searchTree.cc deleted file mode 100644 index 1865755a484..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/searchTree.h b/src/glu/sgi/libnurbs/nurbtess/searchTree.h deleted file mode 100644 index d5e33314bb0..00000000000 --- a/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/src/glu/sgi/libnurbs/nurbtess/zlassert.h b/src/glu/sgi/libnurbs/nurbtess/zlassert.h deleted file mode 100644 index b9c07325768..00000000000 --- a/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> |