00001 00002 /* 00003 pbrt source code Copyright(c) 1998-2010 Matt Pharr and Greg Humphreys. 00004 00005 This file is part of pbrt. 00006 00007 pbrt is free software; you can redistribute it and/or modify 00008 it under the terms of the GNU General Public License as published by 00009 the Free Software Foundation; either version 2 of the License, or 00010 (at your option) any later version. Note that the text contents of 00011 the book "Physically Based Rendering" are *not* licensed under the 00012 GNU GPL. 00013 00014 pbrt is distributed in the hope that it will be useful, 00015 but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00017 GNU General Public License for more details. 00018 00019 You should have received a copy of the GNU General Public License 00020 along with this program. If not, see <http://www.gnu.org/licenses/>. 00021 00022 */ 00023 00024 #if defined(_MSC_VER) 00025 #pragma once 00026 #endif 00027 00028 #ifndef PBRT_TEXTURES_CONSTANT_H 00029 #define PBRT_TEXTURES_CONSTANT_H 00030 00031 // textures/constant.h* 00032 #include "pbrt.h" 00033 #include "texture.h" 00034 #include "paramset.h" 00035 00036 // ConstantTexture Declarations 00037 template <typename T> class ConstantTexture : public Texture<T> { 00038 public: 00039 // ConstantTexture Public Methods 00040 ConstantTexture(const T &v) { value = v; } 00041 T Evaluate(const DifferentialGeometry &) const { 00042 return value; 00043 } 00044 private: 00045 T value; 00046 }; 00047 00048 00049 ConstantTexture<float> *CreateConstantFloatTexture(const Transform &tex2world, 00050 const TextureParams &tp); 00051 ConstantTexture<Spectrum> *CreateConstantSpectrumTexture(const Transform &tex2world, 00052 const TextureParams &tp); 00053 00054 #endif // PBRT_TEXTURES_CONSTANT_H