00001 /*************************************************************************** 00002 * Copyright (C) 1998-2009 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 // single.cpp* 00024 #include "volume.h" 00025 #include "transport.h" 00026 #include "scene.h" 00027 00028 namespace lux 00029 { 00030 00031 // SingleScattering Declarations 00032 class SingleScattering : public VolumeIntegrator { 00033 public: 00034 // SingleScattering Public Methods 00035 SingleScattering(float ss) : stepSize(ss) { } 00036 virtual ~SingleScattering() { } 00037 00038 virtual void Transmittance(const TsPack *tspack, const Scene *, const Ray &ray, 00039 const Sample *sample, float *alpha, SWCSpectrum *const L) const; 00040 virtual void RequestSamples(Sample *sample, const Scene *scene); 00041 virtual int Li(const TsPack *tspack, const Scene *, const RayDifferential &ray, const Sample *sample, SWCSpectrum *L, float *alpha) const; 00042 00043 static VolumeIntegrator *CreateVolumeIntegrator(const ParamSet ¶ms); 00044 00045 private: 00046 // SingleScattering Private Data 00047 float stepSize; 00048 00049 int tauSampleOffset, scatterSampleOffset; 00050 }; 00051 00052 }//namespace lux