PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/core/integrator.h
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