interpolation.hpp
Go to the documentation of this file.
1 
5 /* Copyright (c) 2005-2011 Taneli Kalvas. All rights reserved.
6  *
7  * You can redistribute this software and/or modify it under the terms
8  * of the GNU General Public License as published by the Free Software
9  * Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This library is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this library (file "COPYING" included in the package);
19  * if not, write to the Free Software Foundation, Inc., 51 Franklin
20  * Street, Fifth Floor, Boston, MA 02110-1301 USA
21  *
22  * If you have questions about your rights to use or distribute this
23  * software, please contact Berkeley Lab's Technology Transfer
24  * Department at TTD@lbl.gov. Other questions, comments and bug
25  * reports should be sent directly to the author via email at
26  * taneli.kalvas@jyu.fi.
27  *
28  * NOTICE. This software was developed under partial funding from the
29  * U.S. Department of Energy. As such, the U.S. Government has been
30  * granted for itself and others acting on its behalf a paid-up,
31  * nonexclusive, irrevocable, worldwide license in the Software to
32  * reproduce, prepare derivative works, and perform publicly and
33  * display publicly. Beginning five (5) years after the date
34  * permission to assert copyright is obtained from the U.S. Department
35  * of Energy, and subject to any subsequent five (5) year renewals,
36  * the U.S. Government is granted for itself and others acting on its
37  * behalf a paid-up, nonexclusive, irrevocable, worldwide license in
38  * the Software to reproduce, prepare derivative works, distribute
39  * copies to the public, perform publicly and display publicly, and to
40  * permit others to do so.
41  */
42 
43 #ifndef INTERPOLATION_HPP
44 #define INTERPOLATION_HPP 1
45 
46 
47 #include <vector>
48 #include <cstddef>
49 
50 
57 {
58 protected:
59 
60  size_t _n;
61  size_t _m;
62  std::vector<double> _f;
69  Interpolation2D( size_t n, size_t m, const std::vector<double> &f );
70 
71  const double &__f( int i, int j ) const;
72  double &__f( int i, int j );
73 
74 public:
75 
78  virtual ~Interpolation2D() {}
79 
85  virtual double operator()( double x, double y ) const = 0;
86 };
87 
88 
95 {
96 
97 public:
98 
101  ClosestInterpolation2D( size_t n, size_t m, const std::vector<double> &f );
102 
106 
112  virtual double operator()( double x, double y ) const;
113 };
114 
115 
119 {
120 
121 public:
122 
125  BiLinearInterpolation2D( size_t n, size_t m, const std::vector<double> &f );
126 
130 
136  virtual double operator()( double x, double y ) const;
137 };
138 
139 
146 {
147 
148  std::vector<double> _fx;
149  std::vector<double> _fy;
150  std::vector<double> _fxy;
151  std::vector<double> _c;
156  const double &__fx( int i, int j ) const;
157  const double &__fy( int i, int j ) const;
158  const double &__fxy( int i, int j ) const;
159 
160  double &__fx( int i, int j );
161  double &__fy( int i, int j );
162  double &__fxy( int i, int j );
163 
164  static void calc_coefs( double *c, double *x );
165  static const double wt[16][16];
166 
167 public:
168 
171  BiCubicInterpolation2D( size_t n, size_t m, const std::vector<double> &f );
172 
176 
182  virtual double operator()( double x, double y ) const;
183 };
184 
185 
186 #endif
187 
virtual ~ClosestInterpolation2D()
Destructor.
Definition: interpolation.hpp:105
Base class for 2d interpolation.
Definition: interpolation.hpp:56
ClosestInterpolation2D(size_t n, size_t m, const std::vector< double > &f)
Constructor.
std::vector< double > _f
Function data mesh.
Definition: interpolation.hpp:62
const double & __f(int i, int j) const
virtual double operator()(double x, double y) const
Operator for getting interpolation at (x,y).
virtual ~BiLinearInterpolation2D()
Destructor.
Definition: interpolation.hpp:129
Interpolation2D(size_t n, size_t m, const std::vector< double > &f)
Constructor.
Closest point 2d interpolation.
Definition: interpolation.hpp:94
BiCubic 2d interpolation.
Definition: interpolation.hpp:145
BiLinearInterpolation2D(size_t n, size_t m, const std::vector< double > &f)
Constructor.
virtual ~Interpolation2D()
Virtual destructor.
Definition: interpolation.hpp:78
size_t _m
Size of second coordinate of mesh.
Definition: interpolation.hpp:61
virtual ~BiCubicInterpolation2D()
Destructor.
Definition: interpolation.hpp:175
BiLinear 2d interpolation.
Definition: interpolation.hpp:118
virtual double operator()(double x, double y) const =0
Operator for getting interpolation at (x,y).
virtual double operator()(double x, double y) const
Operator for getting interpolation at (x,y).
BiCubicInterpolation2D(size_t n, size_t m, const std::vector< double > &f)
Constructor.
virtual double operator()(double x, double y) const
Operator for getting interpolation at (x,y).
size_t _n
Size of first coordinate of mesh.
Definition: interpolation.hpp:60