PBRT
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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