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 #ifndef LUX_FRESNELDIELECTRIC_H 00024 #define LUX_FRESNELDIELECTRIC_H 00025 // fresneldielectric.h* 00026 #include "lux.h" 00027 #include "fresnel.h" 00028 00029 namespace lux 00030 { 00031 00032 class FresnelDielectric : public Fresnel { 00033 public: 00034 // FresnelDielectric Public Methods 00035 virtual SWCSpectrum Evaluate(float cosi) const; 00036 FresnelDielectric(float ei, float et, float cB = 0.f) { 00037 eta_i = ei; 00038 eta_t = et; 00039 cb = cB; 00040 } 00041 private: 00042 // FresnelDielectric Private Data 00043 float eta_i, eta_t, cb; 00044 }; 00045 00046 class FresnelDielectricComplement : public FresnelDielectric { 00047 public: 00048 SWCSpectrum Evaluate(float cosi) const { 00049 return SWCSpectrum(1.f) - FresnelDielectric::Evaluate(cosi); 00050 } 00051 FresnelDielectricComplement(float ei, float et, float cB = 0.f) : 00052 FresnelDielectric(ei, et, cB) {} 00053 }; 00054 00055 }//namespace lux 00056 00057 #endif // LUX_FRESNELDIELECTRIC_H 00058