PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/integrators/dipolesubsurface.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_DIPOLESUBSURFACE_H
00037 #define PBRT_INTEGRATORS_DIPOLESUBSURFACE_H
00038 
00039 // integrators/dipolesubsurface.h*
00040 #include "pbrt.h"
00041 #include "integrator.h"
00042 #include "kdtree.h"
00043 #include "renderers/surfacepoints.h"
00044 struct SubsurfaceOctreeNode;
00045 
00046 // DipoleSubsurfaceIntegrator Helper Declarations
00047 struct IrradiancePoint {
00048     IrradiancePoint() { }
00049     IrradiancePoint(const SurfacePoint &sp, const Spectrum &ee)
00050         : p(sp.p), n(sp.n), E(ee), area(sp.area),
00051           rayEpsilon(sp.rayEpsilon) { }
00052     Point p;
00053     Normal n;
00054     Spectrum E;
00055     float area, rayEpsilon;
00056 };
00057 
00058 
00059 
00060 // DipoleSubsurfaceIntegrator Declarations
00061 class DipoleSubsurfaceIntegrator : public SurfaceIntegrator {
00062 public:
00063     // DipoleSubsurfaceIntegrator Public Methods
00064     DipoleSubsurfaceIntegrator(int mdepth, float merror, float mindist,
00065                                const string &fn) {
00066         maxSpecularDepth = mdepth;
00067         maxError = merror;
00068         minSampleDist = mindist;
00069         filename = fn;
00070         octree = NULL;
00071     }
00072     ~DipoleSubsurfaceIntegrator();
00073     Spectrum Li(const Scene *scene, const Renderer *renderer,
00074         const RayDifferential &ray, const Intersection &isect, const Sample *sample,
00075         RNG &rng, MemoryArena &arena) const;
00076     void RequestSamples(Sampler *sampler, Sample *sample, const Scene *scene);
00077     void Preprocess(const Scene *, const Camera *, const Renderer *);
00078 private:
00079     // DipoleSubsurfaceIntegrator Private Data
00080     int maxSpecularDepth;
00081     float maxError, minSampleDist;
00082     string filename;
00083     vector<IrradiancePoint> irradiancePoints;
00084     BBox octreeBounds;
00085     SubsurfaceOctreeNode *octree;
00086     MemoryArena octreeArena;
00087 
00088     // Declare sample parameters for light source sampling
00089     LightSampleOffsets *lightSampleOffsets;
00090     BSDFSampleOffsets *bsdfSampleOffsets;
00091 };
00092 
00093 
00094 DipoleSubsurfaceIntegrator *CreateDipoleSubsurfaceIntegrator(const ParamSet &params);
00095 
00096 #endif // PBRT_INTEGRATORS_DIPOLESUBSURFACE_H