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 // exponential.cpp* 00024 #include "exponential.h" 00025 #include "paramset.h" 00026 #include "dynload.h" 00027 00028 using namespace lux; 00029 00030 // ExponentialDensity Method Definitions 00031 VolumeRegion * ExponentialDensity::CreateVolumeRegion(const Transform &volume2world, 00032 const ParamSet ¶ms) { 00033 // Initialize common volume region parameters 00034 RGBColor sigma_a = params.FindOneRGBColor("sigma_a", 0.); 00035 RGBColor sigma_s = params.FindOneRGBColor("sigma_s", 0.); 00036 float g = params.FindOneFloat("g", 0.); 00037 RGBColor Le = params.FindOneRGBColor("Le", 0.); 00038 Point p0 = params.FindOnePoint("p0", Point(0,0,0)); 00039 Point p1 = params.FindOnePoint("p1", Point(1,1,1)); 00040 float a = params.FindOneFloat("a", 1.); 00041 float b = params.FindOneFloat("b", 1.); 00042 Vector up = params.FindOneVector("updir", Vector(0,1,0)); 00043 return new ExponentialDensity(sigma_a, sigma_s, g, Le, BBox(p0, p1), 00044 volume2world, a, b, up); 00045 } 00046 00047 static DynamicLoader::RegisterVolumeRegion<ExponentialDensity> r("exponential");