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 // mirror.cpp* 00024 #include "mirror.h" 00025 #include "bxdf.h" 00026 #include "specularreflection.h" 00027 #include "fresnelnoop.h" 00028 #include "paramset.h" 00029 00030 using namespace lux; 00031 00032 // Mirror Method Definitions 00033 BSDF *Mirror::GetBSDF(const DifferentialGeometry &dgGeom, const DifferentialGeometry &dgShading, float u) const { 00034 // Allocate _BSDF_, possibly doing bump-mapping with _bumpMap_ 00035 DifferentialGeometry dgs; 00036 if (bumpMap) 00037 Bump(bumpMap, dgGeom, dgShading, &dgs); 00038 else 00039 dgs = dgShading; 00040 BSDF *bsdf = BSDF_ALLOC( BSDF)(dgs, dgGeom.nn); 00041 // NOTE - lordcrc - changed clamping to 0..1 to avoid >1 reflection 00042 SWCSpectrum R(Kr->Evaluate(dgs).Clamp(0.f, 1.f)); 00043 if (!R.Black()) 00044 bsdf->Add(BSDF_ALLOC( SpecularReflection)(R, 00045 BSDF_ALLOC( FresnelNoOp)())); 00046 return bsdf; 00047 } 00048 Material* Mirror::CreateMaterial(const Transform &xform, 00049 const TextureParams &mp) { 00050 boost::shared_ptr<Texture<Spectrum> > Kr = mp.GetSpectrumTexture("Kr", Spectrum(1.f)); 00051 boost::shared_ptr<Texture<float> > bumpMap = mp.GetFloatTexture("bumpmap", 0.f); 00052 return new Mirror(Kr, bumpMap); 00053 }