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_TRIANGLEMESH_H 00037 #define PBRT_SHAPES_TRIANGLEMESH_H 00038 00039 // shapes/trianglemesh.h* 00040 #include "shape.h" 00041 #include <map> 00042 using std::map; 00043 00044 // TriangleMesh Declarations 00045 class TriangleMesh : public Shape { 00046 public: 00047 // TriangleMesh Public Methods 00048 TriangleMesh(const Transform *o2w, const Transform *w2o, bool ro, 00049 int ntris, int nverts, const int *vptr, 00050 const Point *P, const Normal *N, const Vector *S, 00051 const float *uv, const Reference<Texture<float> > &atex); 00052 ~TriangleMesh(); 00053 BBox ObjectBound() const; 00054 BBox WorldBound() const; 00055 bool CanIntersect() const { return false; } 00056 void Refine(vector<Reference<Shape> > &refined) const; 00057 friend class Triangle; 00058 template <typename T> friend class VertexTexture; 00059 protected: 00060 // TriangleMesh Protected Data 00061 int ntris, nverts; 00062 int *vertexIndex; 00063 Point *p; 00064 Normal *n; 00065 Vector *s; 00066 float *uvs; 00067 Reference<Texture<float> > alphaTexture; 00068 }; 00069 00070 00071 class Triangle : public Shape { 00072 public: 00073 // Triangle Public Methods 00074 Triangle(const Transform *o2w, const Transform *w2o, bool ro, 00075 TriangleMesh *m, int n) 00076 : Shape(o2w, w2o, ro) { 00077 mesh = m; 00078 v = &mesh->vertexIndex[3*n]; 00079 PBRT_CREATED_TRIANGLE(this); 00080 } 00081 BBox ObjectBound() const; 00082 BBox WorldBound() const; 00083 bool Intersect(const Ray &ray, float *tHit, float *rayEpsilon, 00084 DifferentialGeometry *dg) const; 00085 bool IntersectP(const Ray &ray) const; 00086 void GetUVs(float uv[3][2]) const { 00087 if (mesh->uvs) { 00088 uv[0][0] = mesh->uvs[2*v[0]]; 00089 uv[0][1] = mesh->uvs[2*v[0]+1]; 00090 uv[1][0] = mesh->uvs[2*v[1]]; 00091 uv[1][1] = mesh->uvs[2*v[1]+1]; 00092 uv[2][0] = mesh->uvs[2*v[2]]; 00093 uv[2][1] = mesh->uvs[2*v[2]+1]; 00094 } 00095 else { 00096 uv[0][0] = 0.; uv[0][1] = 0.; 00097 uv[1][0] = 1.; uv[1][1] = 0.; 00098 uv[2][0] = 1.; uv[2][1] = 1.; 00099 } 00100 } 00101 float Area() const; 00102 virtual void GetShadingGeometry(const Transform &obj2world, 00103 const DifferentialGeometry &dg, 00104 DifferentialGeometry *dgShading) const; 00105 Point Sample(float u1, float u2, Normal *Ns) const; 00106 private: 00107 // Triangle Private Data 00108 Reference<TriangleMesh> mesh; 00109 int *v; 00110 }; 00111 00112 00113 TriangleMesh *CreateTriangleMeshShape(const Transform *o2w, const Transform *w2o, 00114 bool reverseOrientation, const ParamSet ¶ms, 00115 map<string, Reference<Texture<float> > > *floatTextures = NULL); 00116 00117 #endif // PBRT_SHAPES_TRIANGLEMESH_H