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_CORE_INTEGRATOR_H 00037 #define PBRT_CORE_INTEGRATOR_H 00038 00039 // core/integrator.h* 00040 #include "pbrt.h" 00041 #include "primitive.h" 00042 #include "spectrum.h" 00043 #include "light.h" 00044 #include "reflection.h" 00045 #include "sampler.h" 00046 #include "material.h" 00047 #include "probes.h" 00048 #include "renderer.h" 00049 00050 // Integrator Declarations 00051 class Integrator { 00052 public: 00053 // Integrator Interface 00054 virtual ~Integrator(); 00055 virtual void Preprocess(const Scene *scene, const Camera *camera, 00056 const Renderer *renderer) { 00057 } 00058 virtual void RequestSamples(Sampler *sampler, Sample *sample, 00059 const Scene *scene) { 00060 } 00061 }; 00062 00063 00064 class SurfaceIntegrator : public Integrator { 00065 public: 00066 // SurfaceIntegrator Interface 00067 virtual Spectrum Li(const Scene *scene, const Renderer *renderer, 00068 const RayDifferential &ray, const Intersection &isect, 00069 const Sample *sample, RNG &rng, MemoryArena &arena) const = 0; 00070 }; 00071 00072 00073 Spectrum UniformSampleAllLights(const Scene *scene, const Renderer *renderer, 00074 MemoryArena &arena, const Point &p, const Normal &n, const Vector &wo, 00075 float rayEpsilon, float time, BSDF *bsdf, const Sample *sample, RNG &rng, 00076 const LightSampleOffsets *lightSampleOffsets, 00077 const BSDFSampleOffsets *bsdfSampleOffsets); 00078 Spectrum UniformSampleOneLight(const Scene *scene, const Renderer *renderer, 00079 MemoryArena &arena, const Point &p, const Normal &n, const Vector &wo, 00080 float rayEpsilon, float time, BSDF *bsdf, 00081 const Sample *sample, RNG &rng, int lightNumOffset = -1, 00082 const LightSampleOffsets *lightSampleOffset = NULL, 00083 const BSDFSampleOffsets *bsdfSampleOffset = NULL); 00084 Spectrum EstimateDirect(const Scene *scene, const Renderer *renderer, 00085 MemoryArena &arena, const Light *light, const Point &p, 00086 const Normal &n, const Vector &wo, float rayEpsilon, float time, const BSDF *bsdf, 00087 RNG &rng, const LightSample &lightSample, const BSDFSample &bsdfSample, 00088 BxDFType flags); 00089 Spectrum SpecularReflect(const RayDifferential &ray, BSDF *bsdf, RNG &rng, 00090 const Intersection &isect, const Renderer *renderer, const Scene *scene, 00091 const Sample *sample, MemoryArena &arena); 00092 Spectrum SpecularTransmit(const RayDifferential &ray, BSDF *bsdf, RNG &rng, 00093 const Intersection &isect, const Renderer *renderer, const Scene *scene, 00094 const Sample *sample, MemoryArena &arena); 00095 Distribution1D *ComputeLightSamplingCDF(const Scene *scene); 00096 00097 #endif // PBRT_CORE_INTEGRATOR_H