00001 /*************************************************************************** 00002 * Copyright (C) 1998-2007 by authors (see AUTHORS.txt ) * 00003 * * 00004 * This file is part of Lux Renderer. * 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.org * 00021 ***************************************************************************/ 00022 00023 #ifndef LUX_BLACKBODYSPD_H 00024 #define LUX_BLACKBODYSPD_H 00025 // blackbody.h* 00026 #include "lux.h" 00027 #include "spectrum.h" 00028 #include "spd.h" 00029 00030 #define BB_CACHE_START 380. // precomputed cache starts at wavelength, 00031 #define BB_CACHE_END 720. // and ends at wavelength 00032 #define BB_CACHE_SAMPLES 256 // total number of cache samples 00033 00034 namespace lux 00035 { 00036 00037 class BlackbodySPD : public SPD { 00038 public: 00039 BlackbodySPD() : SPD() { 00040 init(6500.f); // default to D65 temperature 00041 } 00042 00043 BlackbodySPD(float t) : SPD() { 00044 init(t); 00045 } 00046 00047 ~BlackbodySPD() {} 00048 00049 void init(float t); 00050 00051 protected: 00052 float temp; 00053 00054 }; 00055 00056 }//namespace lux 00057 00058 #endif // LUX_BLACKBODYSPD_H 00059