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 // uv.cpp* 00024 #include "lux.h" 00025 #include "texture.h" 00026 #include "paramset.h" 00027 00028 namespace lux 00029 { 00030 00031 // UVTexture Declarations 00032 class UVTexture : public Texture<Spectrum> { 00033 public: 00034 // UVTexture Public Methods 00035 UVTexture(TextureMapping2D *m) { 00036 mapping = m; 00037 } 00038 ~UVTexture() { 00039 delete mapping; 00040 } 00041 Spectrum Evaluate(const DifferentialGeometry &dg) const { 00042 float s, t, dsdx, dtdx, dsdy, dtdy; 00043 mapping->Map(dg, &s, &t, &dsdx, &dtdx, &dsdy, &dtdy); 00044 float cs[COLOR_SAMPLES]; 00045 memset(cs, 0, COLOR_SAMPLES * sizeof(float)); 00046 cs[0] = s - Floor2Int(s); 00047 cs[1] = t - Floor2Int(t); 00048 return Spectrum(cs); 00049 } 00050 00051 static Texture<float> * CreateFloatTexture(const Transform &tex2world, const TextureParams &tp); 00052 static Texture<Spectrum> * CreateSpectrumTexture(const Transform &tex2world, const TextureParams &tp); 00053 private: 00054 TextureMapping2D *mapping; 00055 }; 00056 00057 }//namespace lux 00058