00001 /*************************************************************************** 00002 * Copyright (C) 1998-2008 by authors (see AUTHORS.txt ) * 00003 * * 00004 * This file is part of LuxRender. * 00005 * * 00006 * Lux Renderer is free software; you can redistribute it and/or modify * 00007 * it under the terms of the GNU General Public License as published by * 00008 * the Free Software Foundation; either version 3 of the License, or * 00009 * (at your option) any later version. * 00010 * * 00011 * Lux Renderer is distributed in the hope that it will be useful, * 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00014 * GNU General Public License for more details. * 00015 * * 00016 * You should have received a copy of the GNU General Public License * 00017 * along with this program. If not, see <http://www.gnu.org/licenses/>. * 00018 * * 00019 * This project is based on PBRT ; see http://www.pbrt.org * 00020 * Lux Renderer website : http://www.luxrender.net * 00021 ***************************************************************************/ 00022 00023 // path.cpp* 00024 #include "lux.h" 00025 #include "transport.h" 00026 #include "scene.h" 00027 00028 namespace lux 00029 { 00030 00031 // PathIntegrator Declarations 00032 class PathIntegrator : public SurfaceIntegrator { 00033 public: 00034 // PathIntegrator types 00035 enum LightStrategy { SAMPLE_ALL_UNIFORM, SAMPLE_ONE_UNIFORM, 00036 SAMPLE_AUTOMATIC 00037 }; 00038 enum RRStrategy { RR_EFFICIENCY, RR_PROBABILITY, RR_NONE }; 00039 00040 // PathIntegrator Public Methods 00041 SWCSpectrum Li(const Scene *scene, const RayDifferential &ray, const Sample *sample, float *newAlpha) const; 00042 void RequestSamples(Sample *sample, const Scene *scene); 00043 PathIntegrator(LightStrategy st, RRStrategy rst, int md, float cp) { 00044 lightStrategy = st; 00045 rrStrategy = rst; 00046 maxDepth = md; 00047 continueProbability = cp; 00048 } 00049 virtual ~PathIntegrator() { } 00050 static SurfaceIntegrator *CreateSurfaceIntegrator(const ParamSet ¶ms); 00051 private: 00052 // PathIntegrator Private Data 00053 LightStrategy lightStrategy; 00054 RRStrategy rrStrategy; 00055 int maxDepth; 00056 float continueProbability; 00057 // Declare sample parameters for light source sampling 00058 int sampleOffset; 00059 }; 00060 00061 }//namespace lux 00062