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SoNormalGenerator.h
00001 #ifndef COIN_SONORMALGENERATOR_H
00002 #define COIN_SONORMALGENERATOR_H
00003 
00004 /**************************************************************************\
00005  *
00006  *  This file is part of the Coin 3D visualization library.
00007  *  Copyright (C) by Kongsberg Oil & Gas Technologies.
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 Kongsberg Oil & Gas Technologies
00018  *  about acquiring a Coin Professional Edition License.
00019  *
00020  *  See http://www.coin3d.org/ for more information.
00021  *
00022  *  Kongsberg Oil & Gas Technologies, Bygdoy Alle 5, 0257 Oslo, NORWAY.
00023  *  http://www.sim.no/  sales@sim.no  coin-support@coin3d.org
00024  *
00025 \**************************************************************************/
00026 
00027 #include <Inventor/SbVec3f.h>
00028 #include <Inventor/SbBSPTree.h>
00029 #include <Inventor/lists/SbList.h>
00030 #include <Inventor/system/inttypes.h>
00031 
00032 class COIN_DLL_API SoNormalGenerator {
00033 public:
00034   SoNormalGenerator(const SbBool ccw, const int approxVertices = 64);
00035   ~SoNormalGenerator();
00036 
00037   void reset(const SbBool ccw);
00038   
00039   void beginPolygon();
00040   void polygonVertex(const SbVec3f &v);
00041   void endPolygon();
00042 
00043   void triangle(const SbVec3f &v0,
00044                 const SbVec3f &v1,
00045                 const SbVec3f &v2);
00046   void quad(const SbVec3f &v0,
00047             const SbVec3f &v1,
00048             const SbVec3f &v2,
00049             const SbVec3f &v3);
00050 
00051   void generate(const float creaseAngle,
00052                 const int32_t * striplens = NULL,
00053                 const int numstrips = 0);
00054 
00055   void generatePerStrip(const int32_t * striplens,
00056                         const int numstrips);
00057   void generatePerFace(void);
00058   void generateOverall(void);
00059 
00060   // call these only after generate
00061   int getNumNormals() const;
00062   void setNumNormals(const int num);
00063   const SbVec3f *getNormals() const;
00064   const SbVec3f & getNormal(const int32_t i) const;
00065   void setNormal(const int32_t index, const SbVec3f &normal);
00066 
00067 private:
00068   SbBSPTree bsp;
00069   SbList <int> vertexList;
00070   SbList <int> vertexFace;
00071   SbList <SbVec3f> faceNormals;
00072   SbList <SbVec3f> vertexNormals;
00073 
00074   SbBool ccw;
00075   SbBool perVertex;
00076   int currFaceStart;
00077 
00078   SbVec3f calcFaceNormal();
00079 };
00080 
00081 #endif // !COIN_SONORMALGENERATOR_H

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