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diff --git a/src/glu/sgi/libnurbs/nurbtess/monoChain.h b/src/glu/sgi/libnurbs/nurbtess/monoChain.h
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--- a/src/glu/sgi/libnurbs/nurbtess/monoChain.h
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@@ -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