interpolation.hpp
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00001 00005 /* Copyright (c) 2005-2011 Taneli Kalvas. All rights reserved. 00006 * 00007 * You can redistribute this software and/or modify it under the terms 00008 * of the GNU General Public License as published by the Free Software 00009 * Foundation; either version 2 of the License, or (at your option) 00010 * any later version. 00011 * 00012 * This library is distributed in the hope that it will be useful, but 00013 * WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with this library (file "COPYING" included in the package); 00019 * if not, write to the Free Software Foundation, Inc., 51 Franklin 00020 * Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 * 00022 * If you have questions about your rights to use or distribute this 00023 * software, please contact Berkeley Lab's Technology Transfer 00024 * Department at TTD@lbl.gov. Other questions, comments and bug 00025 * reports should be sent directly to the author via email at 00026 * taneli.kalvas@jyu.fi. 00027 * 00028 * NOTICE. This software was developed under partial funding from the 00029 * U.S. Department of Energy. As such, the U.S. Government has been 00030 * granted for itself and others acting on its behalf a paid-up, 00031 * nonexclusive, irrevocable, worldwide license in the Software to 00032 * reproduce, prepare derivative works, and perform publicly and 00033 * display publicly. Beginning five (5) years after the date 00034 * permission to assert copyright is obtained from the U.S. Department 00035 * of Energy, and subject to any subsequent five (5) year renewals, 00036 * the U.S. Government is granted for itself and others acting on its 00037 * behalf a paid-up, nonexclusive, irrevocable, worldwide license in 00038 * the Software to reproduce, prepare derivative works, distribute 00039 * copies to the public, perform publicly and display publicly, and to 00040 * permit others to do so. 00041 */ 00042 00043 #ifndef INTERPOLATION_HPP 00044 #define INTERPOLATION_HPP 1 00045 00046 00047 #include <vector> 00048 #include <cstddef> 00049 00050 00056 class Interpolation2D 00057 { 00058 protected: 00059 00060 size_t _n; 00061 size_t _m; 00062 std::vector<double> _f; 00069 Interpolation2D( size_t n, size_t m, const std::vector<double> &f ); 00070 00071 const double &__f( int i, int j ) const; 00072 double &__f( int i, int j ); 00073 00074 public: 00075 00078 virtual ~Interpolation2D() {} 00079 00085 virtual double operator()( double x, double y ) const = 0; 00086 }; 00087 00088 00094 class ClosestInterpolation2D : public Interpolation2D 00095 { 00096 00097 public: 00098 00101 ClosestInterpolation2D( size_t n, size_t m, const std::vector<double> &f ); 00102 00105 virtual ~ClosestInterpolation2D() {} 00106 00112 virtual double operator()( double x, double y ) const; 00113 }; 00114 00115 00118 class BiLinearInterpolation2D : public Interpolation2D 00119 { 00120 00121 public: 00122 00125 BiLinearInterpolation2D( size_t n, size_t m, const std::vector<double> &f ); 00126 00129 virtual ~BiLinearInterpolation2D() {} 00130 00136 virtual double operator()( double x, double y ) const; 00137 }; 00138 00139 00145 class BiCubicInterpolation2D : public Interpolation2D 00146 { 00147 00148 std::vector<double> _fx; 00149 std::vector<double> _fy; 00150 std::vector<double> _fxy; 00151 std::vector<double> _c; 00156 const double &__fx( int i, int j ) const; 00157 const double &__fy( int i, int j ) const; 00158 const double &__fxy( int i, int j ) const; 00159 00160 double &__fx( int i, int j ); 00161 double &__fy( int i, int j ); 00162 double &__fxy( int i, int j ); 00163 00164 static void calc_coefs( double *c, double *x ); 00165 static const double wt[16][16]; 00166 00167 public: 00168 00171 BiCubicInterpolation2D( size_t n, size_t m, const std::vector<double> &f ); 00172 00175 virtual ~BiCubicInterpolation2D() {} 00176 00182 virtual double operator()( double x, double y ) const; 00183 }; 00184 00185 00186 #endif 00187