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 // directlighting.cpp* 00024 #include "lux.h" 00025 #include "light.h" 00026 #include "transport.h" 00027 #include "scene.h" 00028 00029 namespace lux 00030 { 00031 00032 // DirectLighting Declarations 00033 00034 class DirectLighting : public SurfaceIntegrator { 00035 public: 00036 // DirectLighting types 00037 enum LightStrategy { SAMPLE_ALL_UNIFORM, SAMPLE_ONE_UNIFORM, 00038 SAMPLE_AUTOMATIC 00039 }; 00040 00041 // DirectLighting Public Methods 00042 DirectLighting(LightStrategy ls, int md); 00043 ~DirectLighting() { } 00044 00045 SWCSpectrum Li(const Scene *scene, const RayDifferential &ray, const Sample *sample, 00046 float *alpha) const; 00047 void RequestSamples(Sample *sample, const Scene *scene); 00048 00049 static SurfaceIntegrator *CreateSurfaceIntegrator(const ParamSet ¶ms); 00050 00051 private: 00052 SWCSpectrum LiInternal(const Scene *scene, const RayDifferential &ray, 00053 const Sample *sample, float *alpha, int rayDepth) const; 00054 00055 // DirectLighting Private Data 00056 LightStrategy lightStrategy; 00057 00058 int maxDepth; // NOBOOK 00059 // Declare sample parameters for light source sampling 00060 int sampleOffset; 00061 }; 00062 00063 }//namespace lux 00064