PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/integrators/photonmap.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_PHOTONMAP_H
00037 #define PBRT_INTEGRATORS_PHOTONMAP_H
00038 
00039 // integrators/photonmap.h*
00040 #include "pbrt.h"
00041 #include "integrator.h"
00042 #include "kdtree.h"
00043 
00044 struct Photon;
00045 struct RadiancePhoton;
00046 struct ClosePhoton;
00047 struct PhotonProcess;
00048 struct RadiancePhotonProcess;
00049 
00050 
00051 // PhotonIntegrator Declarations
00052 class PhotonIntegrator : public SurfaceIntegrator {
00053 public:
00054     // PhotonIntegrator Public Methods
00055     PhotonIntegrator(int ncaus, int nindir, int nLookup, int maxspecdepth,
00056         int maxphotondepth, float maxdist, bool finalGather, int gatherSamples,
00057         float ga);
00058     ~PhotonIntegrator();
00059     Spectrum Li(const Scene *scene, const Renderer *renderer,
00060         const RayDifferential &ray, const Intersection &isect, const Sample *sample,
00061         RNG &rng, MemoryArena &arena) const;
00062     void RequestSamples(Sampler *sampler, Sample *sample, const Scene *scene);
00063     void Preprocess(const Scene *scene, const Camera *camera, const Renderer *renderer);
00064 private:
00065     // PhotonIntegrator Private Methods
00066     friend class PhotonShootingTask;
00067 
00068     // PhotonIntegrator Private Data
00069     uint32_t nCausticPhotonsWanted, nIndirectPhotonsWanted, nLookup;
00070     float maxDistSquared;
00071     int maxSpecularDepth, maxPhotonDepth;
00072     bool finalGather;
00073     int gatherSamples;
00074     float cosGatherAngle;
00075 
00076     // Declare sample parameters for light source sampling
00077     LightSampleOffsets *lightSampleOffsets;
00078     BSDFSampleOffsets *bsdfSampleOffsets;
00079     BSDFSampleOffsets bsdfGatherSampleOffsets, indirGatherSampleOffsets;
00080     int nCausticPaths, nIndirectPaths;
00081     KdTree<Photon> *causticMap;
00082     KdTree<Photon> *indirectMap;
00083     KdTree<RadiancePhoton> *radianceMap;
00084 };
00085 
00086 
00087 PhotonIntegrator *CreatePhotonMapSurfaceIntegrator(const ParamSet &params);
00088 
00089 #endif // PBRT_INTEGRATORS_PHOTONMAP_H