PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/core/sampler.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_SAMPLER_H
00037 #define PBRT_CORE_SAMPLER_H
00038 
00039 // core/sampler.h*
00040 #include "pbrt.h"
00041 #include "geometry.h"
00042 #include "rng.h"
00043 #include "memory.h"
00044 
00045 // Sampling Declarations
00046 class Sampler {
00047 public:
00048     // Sampler Interface
00049     virtual ~Sampler();
00050     Sampler(int xstart, int xend, int ystart, int yend,
00051             int spp, float sopen, float sclose);
00052     virtual int GetMoreSamples(Sample *sample, RNG &rng) = 0;
00053     virtual int MaximumSampleCount() = 0;
00054     virtual bool ReportResults(Sample *samples, const RayDifferential *rays,
00055         const Spectrum *Ls, const Intersection *isects, int count);
00056     virtual Sampler *GetSubSampler(int num, int count) = 0;
00057     virtual int RoundSize(int size) const = 0;
00058 
00059     // Sampler Public Data
00060     const int xPixelStart, xPixelEnd, yPixelStart, yPixelEnd;
00061     const int samplesPerPixel;
00062     const float shutterOpen, shutterClose;
00063 protected:
00064     // Sampler Protected Methods
00065     void ComputeSubWindow(int num, int count, int *xstart, int *xend, int *ystart, int *yend) const;
00066 };
00067 
00068 
00069 struct CameraSample {
00070     float imageX, imageY;
00071     float lensU, lensV;
00072     float time;
00073 };
00074 
00075 
00076 struct Sample : public CameraSample {
00077     // Sample Public Methods
00078     Sample(Sampler *sampler, SurfaceIntegrator *surf, VolumeIntegrator *vol,
00079         const Scene *scene);
00080     uint32_t Add1D(uint32_t num) {
00081         n1D.push_back(num);
00082         return n1D.size()-1;
00083     }
00084     uint32_t Add2D(uint32_t num) {
00085         n2D.push_back(num);
00086         return n2D.size()-1;
00087     }
00088     ~Sample() {
00089         if (oneD != NULL) {
00090             FreeAligned(oneD[0]);
00091             FreeAligned(oneD);
00092         }
00093     }
00094     Sample *Duplicate(int count) const;
00095 
00096     // Sample Public Data
00097     vector<uint32_t> n1D, n2D;
00098     float **oneD, **twoD;
00099 private:
00100     // Sample Private Methods
00101     void AllocateSampleMemory();
00102     Sample() { oneD = twoD = NULL; }
00103 };
00104 
00105 
00106 
00107 #endif // PBRT_CORE_SAMPLER_H