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00001 #ifndef COIN_SBTESSELATOR_H 00002 #define COIN_SBTESSELATOR_H 00003 00004 /**************************************************************************\ 00005 * 00006 * This file is part of the Coin 3D visualization library. 00007 * Copyright (C) 1998-2007 by Systems in Motion. All rights reserved. 00008 * 00009 * This library is free software; you can redistribute it and/or 00010 * modify it under the terms of the GNU General Public License 00011 * ("GPL") version 2 as published by the Free Software Foundation. 00012 * See the file LICENSE.GPL at the root directory of this source 00013 * distribution for additional information about the GNU GPL. 00014 * 00015 * For using Coin with software that can not be combined with the GNU 00016 * GPL, and for taking advantage of the additional benefits of our 00017 * support services, please contact Systems in Motion about acquiring 00018 * a Coin Professional Edition License. 00019 * 00020 * See http://www.coin3d.org/ for more information. 00021 * 00022 * Systems in Motion, Postboks 1283, Pirsenteret, 7462 Trondheim, NORWAY. 00023 * http://www.sim.no/ sales@sim.no coin-support@coin3d.org 00024 * 00025 \**************************************************************************/ 00026 00027 #include <Inventor/SbBasic.h> 00028 #include <Inventor/lists/SbList.h> 00029 #include <Inventor/SbVec3f.h> 00030 #include <stddef.h> 00031 00032 struct SbTVertex; 00033 class SbHeap; 00034 class SbVec3f; 00035 00036 typedef void SbTesselatorCB(void * v0, void * v1, void * v2, void * data); 00037 00038 class COIN_DLL_API SbTesselator { 00039 public: 00040 SbTesselator(SbTesselatorCB * func = NULL, void * data = NULL); 00041 ~SbTesselator(void); 00042 00043 void beginPolygon(SbBool keepVertices = FALSE, 00044 const SbVec3f & normal = SbVec3f(0.0f, 0.0f, 0.0f)); 00045 void addVertex(const SbVec3f &v, void * data); 00046 void endPolygon(void); 00047 void setCallback(SbTesselatorCB * func, void * data); 00048 00049 private: 00050 struct SbTVertex * newVertex(void); 00051 void cleanUp(void); 00052 00053 int currVertex; 00054 SbList <struct SbTVertex*> vertexStorage; 00055 SbHeap * heap; 00056 00057 SbTVertex * headV, * tailV; 00058 int numVerts; 00059 SbVec3f polyNormal; 00060 int X,Y; 00061 int polyDir; 00062 void (*callback)(void * v0,void * v1,void * v2,void * data); 00063 void * callbackData; 00064 SbBool hasNormal; 00065 SbBool keepVertices; 00066 00067 void emitTriangle(SbTVertex * v); 00068 void cutTriangle(SbTVertex * t); 00069 void calcPolygonNormal(void); 00070 00071 SbBool circleCenter(const SbVec3f &a, const SbVec3f &b, 00072 const SbVec3f &c, float &cx, float &cy); 00073 float circleSize(const SbVec3f &a, const SbVec3f &b, const SbVec3f &c); 00074 float circleSize(SbTVertex * v); 00075 float dot2D(const SbVec3f &v1, const SbVec3f &v2); 00076 SbBool clippable(SbTVertex * v); 00077 SbBool isTriangle(SbTVertex * v); 00078 SbBool pointInTriangle(SbTVertex * p, SbTVertex * t); 00079 float area(SbTVertex * t); 00080 00081 static float heap_evaluate(void * v); 00082 static int heap_compare(void * v0, void * v1); 00083 }; 00084 00085 #endif // !COIN_SBTESSELATOR_H
Copyright © 1998-2007 by Systems in Motion AS. All rights reserved.
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