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_COOKTORRANCE_H 00024 #define LUX_COOKTORRANCE_H 00025 // cooktorrance.h* 00026 #include "lux.h" 00027 #include "bxdf.h" 00028 #include "spectrum.h" 00029 00030 namespace lux 00031 { 00032 00033 // Multilobe Cook-Torrance model 00034 class CookTorrance : public BxDF { 00035 public: 00036 // CookTorrance Public Methods 00037 CookTorrance(const SWCSpectrum &kd, u_int nl, 00038 const SWCSpectrum *ks, MicrofacetDistribution **dist, Fresnel **fres); 00039 SWCSpectrum f(const Vector &wo, const Vector &wi) const; 00040 float G(const Vector &wo, const Vector &wi, const Vector &wh) const; 00041 SWCSpectrum Sample_f(const Vector &wi, Vector *sampled_f, float u1, float u2, float *pdf, float *pdfBack = NULL) const; 00042 float Pdf(const Vector &wi, const Vector &wo) const; 00043 private: 00044 // Cook-Torrance Private Data 00045 SWCSpectrum KD; 00046 u_int nLobes; 00047 const SWCSpectrum *KS; 00048 MicrofacetDistribution **distribution; 00049 Fresnel **fresnel; 00050 }; 00051 00052 }//namespace lux 00053 00054 #endif // LUX_COOKTORRANCE_H 00055