PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/integrators/irradiancecache.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_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 &params);
00095 
00096 #endif // PBRT_INTEGRATORS_IRRADIANCECACHE_H