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authormarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
committermarha <marha@users.sourceforge.net>2009-10-08 13:15:52 +0000
commita0c4815433ccd57322f4f7703ca35e9ccfa59250 (patch)
treef5213802ec12adb86ec3136001c1c29fe5343700 /mesalib/src/glu/sgi/libnurbs/nurbtess/monoChain.h
parentc73dc01b6de45612b24dc2dd34fba24d81ebf46c (diff)
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Added MesaLib-7.6
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+/*
+ * 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