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_INTEGRATORS_IRRADIANCECACHE_H 00037 #define PBRT_INTEGRATORS_IRRADIANCECACHE_H 00038 00039 // integrators/irradiancecache.h* 00040 #include "pbrt.h" 00041 #include "integrator.h" 00042 #include "octree.h" 00043 #include "parallel.h" 00044 00045 // IrradianceCacheIntegrator Forward Declarations 00046 struct IrradianceSample; 00047 00048 // IrradianceCacheIntegrator Declarations 00049 class IrradianceCacheIntegrator : public SurfaceIntegrator { 00050 public: 00051 // IrradianceCacheIntegrator Public Methods 00052 IrradianceCacheIntegrator(float minwt, float minsp, float maxsp, 00053 float maxang, int maxspec, int maxind, int ns) { 00054 minWeight = minwt; 00055 minSamplePixelSpacing = minsp; 00056 maxSamplePixelSpacing = maxsp; 00057 cosMaxSampleAngleDifference = cosf(Degrees(maxang)); 00058 nSamples = ns; 00059 maxSpecularDepth = maxspec; 00060 maxIndirectDepth = maxind; 00061 mutex = RWMutex::Create(); 00062 lightSampleOffsets = NULL; 00063 bsdfSampleOffsets = NULL; 00064 } 00065 ~IrradianceCacheIntegrator(); 00066 Spectrum Li(const Scene *scene, const Renderer *renderer, 00067 const RayDifferential &ray, const Intersection &isect, 00068 const Sample *sample, RNG &rng, MemoryArena &arena) const; 00069 void RequestSamples(Sampler *sampler, Sample *sample, const Scene *scene); 00070 void Preprocess(const Scene *, const Camera *, const Renderer *); 00071 private: 00072 // IrradianceCacheIntegrator Private Data 00073 float minSamplePixelSpacing, maxSamplePixelSpacing; 00074 float minWeight, cosMaxSampleAngleDifference; 00075 int nSamples, maxSpecularDepth, maxIndirectDepth; 00076 mutable RWMutex *mutex; 00077 00078 // Declare sample parameters for light source sampling 00079 LightSampleOffsets *lightSampleOffsets; 00080 BSDFSampleOffsets *bsdfSampleOffsets; 00081 mutable Octree<IrradianceSample *> *octree; 00082 00083 // IrradianceCacheIntegrator Private Methods 00084 Spectrum indirectLo(const Point &p, const Normal &ng, float pixelSpacing, 00085 const Vector &wo, float rayEpsilon,BSDF *bsdf, BxDFType flags, RNG &rng, 00086 const Scene *scene, const Renderer *renderer, MemoryArena &arena) const; 00087 bool interpolateE(const Scene *scene, 00088 const Point &p, const Normal &n, Spectrum *E, Vector *wi) const; 00089 Spectrum pathL(Ray &r, const Scene *scene, const Renderer *renderer, 00090 RNG &rng, MemoryArena &arena) const; 00091 }; 00092 00093 00094 IrradianceCacheIntegrator *CreateIrradianceCacheIntegrator(const ParamSet ¶ms); 00095 00096 #endif // PBRT_INTEGRATORS_IRRADIANCECACHE_H