PBRT
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00001 00002 /* 00003 pbrt source code Copyright(c) 1998-2012 Matt Pharr and Greg Humphreys. 00004 00005 This file is part of pbrt. 00006 00007 Redistribution and use in source and binary forms, with or without 00008 modification, are permitted provided that the following conditions are 00009 met: 00010 00011 - Redistributions of source code must retain the above copyright 00012 notice, this list of conditions and the following disclaimer. 00013 00014 - Redistributions in binary form must reproduce the above copyright 00015 notice, this list of conditions and the following disclaimer in the 00016 documentation and/or other materials provided with the distribution. 00017 00018 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 00019 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 00020 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00021 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00022 HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00023 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00024 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00025 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00026 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00027 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00028 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00029 00030 */ 00031 00032 #if defined(_MSC_VER) 00033 #pragma once 00034 #endif 00035 00036 #ifndef PBRT_SHAPES_LOOPSUBDIV_H 00037 #define PBRT_SHAPES_LOOPSUBDIV_H 00038 00039 // shapes/loopsubdiv.h* 00040 #include "shape.h" 00041 struct SDVertex; 00042 struct SDFace; 00043 00044 // LoopSubdiv Declarations 00045 class LoopSubdiv : public Shape { 00046 public: 00047 // LoopSubdiv Public Methods 00048 LoopSubdiv(const Transform *o2w, const Transform *w2o, bool ro, 00049 int nt, int nv, const int *vi, 00050 const Point *P, int nlevels); 00051 ~LoopSubdiv(); 00052 bool CanIntersect() const; 00053 void Refine(vector<Reference<Shape> > &refined) const; 00054 BBox ObjectBound() const; 00055 BBox WorldBound() const; 00056 private: 00057 // LoopSubdiv Private Methods 00058 static float beta(int valence) { 00059 if (valence == 3) return 3.f/16.f; 00060 else return 3.f / (8.f * valence); 00061 } 00062 static Point weightOneRing(SDVertex *vert, float beta); 00063 static Point weightBoundary(SDVertex *vert, float beta); 00064 static float gamma(int valence) { 00065 return 1.f / (valence + 3.f / (8.f * beta(valence))); 00066 } 00067 00068 // LoopSubdiv Private Data 00069 int nLevels; 00070 vector<SDVertex *> vertices; 00071 vector<SDFace *> faces; 00072 }; 00073 00074 00075 LoopSubdiv *CreateLoopSubdivShape(const Transform *o2w, const Transform *w2o, 00076 bool reverseOrientation, const ParamSet ¶ms); 00077 00078 #endif // PBRT_SHAPES_LOOPSUBDIV_H