00001 ////////////////////////////////////////////////////////////////////// 00002 // 6/26/02 Aaron Lefohn Scientific Computing and Imaging Institute 00003 // School of Computing University of Utah 00004 // 00005 // This library is free software; you can redistribute it and/or 00006 // modify it under the terms of the GNU Lesser General Public 00007 // License as published by the Free Software Foundation; either 00008 // version 2.1 of the License, or (at your option) any later version. 00009 // 00010 // This library is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 // Lesser General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU Lesser General Public 00016 // License along with this library; if not, write to the Free Software 00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 00019 #ifndef GLIFT_COORD_TRANS_H 00020 #define GLIFT_COORD_TRANS_H 00021 00022 #include "../core/gliftObject.h" 00023 #include "gliftDecl.h" 00024 #include <mathGutz.h> 00025 #include <arrayGutz.h> 00026 #include <vector> 00027 00028 namespace glift { 00029 00030 /// Typedefs 00031 class CoordTrans; 00032 typedef std::vector<CoordTrans> VecCoordTrans; 00033 typedef std::vector<CoordTrans*> VecCoordTransP; 00034 00035 ////////////////////////////////////////////////////////////////////////// 00036 /// 00037 /// CoordTrans - Encapsulates a 4x4 matrix transform that can be specified 00038 /// as an absolute or relative transform. 00039 /// 00040 /// It is most commonly used to transform texture coordinates 00041 /// of the primitive to which a shader is applied. 00042 /// 00043 /// CoordTrans 00044 /////////////////////// 00045 class _export_ CoordTrans : public GliftObject 00046 { 00047 public: 00048 CoordTrans(); 00049 CoordTrans( const gutz::vec2f& bias, bool relBias=false ); 00050 CoordTrans( const gutz::vec3f& bias, bool relBias=false ); 00051 CoordTrans( const gutz::vec3f& scale, const gutz::vec3f& bias, bool relScale, bool relBias ); 00052 CoordTrans( const gutz::mat4f& mat, bool relScale=false, bool relTrans=false ); 00053 00054 /// Apply transform to 'coord'. 00055 /// - If 'm_relScale' or 'm_relBias' are true, the appropriate transform 00056 /// components are first divided by the corresponding component 00057 /// of the 'divisor' vector. 00058 gutz::vec2f apply( const gutz::vec2f& coord, const gutz::vec2f& divisor ); 00059 gutz::vec3f apply( const gutz::vec3f& coord, const gutz::vec3f& divisor ); 00060 gutz::arrayo1f apply( const gutz::arrayw1f& coord, const gutz::arrayw1f& divisor ); 00061 00062 private: 00063 gutz::mat4f m_mat; /// The scale/bias transformation matrix 00064 00065 bool m_relScale; /// Should scale be applied rel. to geom. or as absolute value? 00066 bool m_relBias; /// Should bias be applied rel. to geom. or as absolute value? 00067 00068 void init( const gutz::vec3f& scale, const gutz::vec3f& bias, bool relScale, bool relBias ); 00069 gutz::mat4f applyDivisor( const gutz::arrayw1f& divisor ); 00070 }; 00071 00072 } /// End of namespace glift 00073 00074 #endif
