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_IGI_H 00037 #define PBRT_INTEGRATORS_IGI_H 00038 00039 // integrators/igi.h* 00040 #include "pbrt.h" 00041 #include "integrator.h" 00042 00043 // IGIIntegrator Local Structures 00044 struct VirtualLight { 00045 VirtualLight() { } 00046 VirtualLight(const Point &pp, const Normal &nn, const Spectrum &c, 00047 float reps) 00048 : p(pp), n(nn), pathContrib(c), rayEpsilon(reps) { } 00049 Point p; 00050 Normal n; 00051 Spectrum pathContrib; 00052 float rayEpsilon; 00053 }; 00054 00055 00056 00057 // IGIIntegrator Declarations 00058 class IGIIntegrator : public SurfaceIntegrator { 00059 public: 00060 // IGIIntegrator Public Methods 00061 ~IGIIntegrator(); 00062 Spectrum Li(const Scene *scene, const Renderer *renderer, 00063 const RayDifferential &ray, const Intersection &isect, 00064 const Sample *sample, RNG &rng, MemoryArena &arena) const; 00065 void RequestSamples(Sampler *sampler, Sample *sample, const Scene *scene); 00066 void Preprocess(const Scene *, const Camera *, const Renderer *); 00067 IGIIntegrator(uint32_t nl, uint32_t ns, float rrt, int maxd, float gl, int ng) { 00068 nLightPaths = RoundUpPow2(nl); 00069 nLightSets = RoundUpPow2(ns); 00070 rrThreshold = rrt; 00071 maxSpecularDepth = maxd; 00072 virtualLights.resize(nLightSets); 00073 gLimit = gl; 00074 nGatherSamples = ng; 00075 lightSampleOffsets = NULL; 00076 bsdfSampleOffsets = NULL; 00077 } 00078 private: 00079 // IGIIntegrator Private Data 00080 00081 // Declare sample parameters for light source sampling 00082 LightSampleOffsets *lightSampleOffsets; 00083 BSDFSampleOffsets *bsdfSampleOffsets; 00084 uint32_t nLightPaths, nLightSets; 00085 float gLimit; 00086 int nGatherSamples; 00087 float rrThreshold; 00088 int maxSpecularDepth; 00089 int vlSetOffset; 00090 BSDFSampleOffsets gatherSampleOffset; 00091 vector<vector<VirtualLight> > virtualLights; 00092 }; 00093 00094 00095 IGIIntegrator *CreateIGISurfaceIntegrator(const ParamSet ¶ms); 00096 00097 #endif // PBRT_INTEGRATORS_IGI_H