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 // nulltransmission.cpp* 00024 #include "nulltransmission.h" 00025 #include "spectrum.h" 00026 00027 using namespace lux; 00028 00029 bool NullTransmission::Sample_f(const TsPack *tspack, const Vector &wo, Vector *wi, 00030 float u1, float u2, SWCSpectrum *const f_, float *pdf, 00031 float *pdfBack, bool reverse) const 00032 { 00033 *wi = -wo; 00034 *pdf = 1.f; 00035 if (pdfBack) 00036 *pdfBack = 1.f; 00037 *f_ = 1.f / fabsf(CosTheta(*wi)); 00038 return true; 00039 } 00040