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math/optimize/transform.h
1 //
2 // transform.h
3 //
4 // Copyright (C) 1996 Limit Point Systems, Inc.
5 //
6 // Author: Curtis Janssen <cljanss@limitpt.com>
7 // Maintainer: LPS
8 //
9 // This file is part of the SC Toolkit.
10 //
11 // The SC Toolkit is free software; you can redistribute it and/or modify
12 // it under the terms of the GNU Library General Public License as published by
13 // the Free Software Foundation; either version 2, or (at your option)
14 // any later version.
15 //
16 // The SC Toolkit is distributed in the hope that it will be useful,
17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 // GNU Library General Public License for more details.
20 //
21 // You should have received a copy of the GNU Library General Public License
22 // along with the SC Toolkit; see the file COPYING.LIB. If not, write to
23 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 //
25 // The U.S. Government is granted a limited license as per AL 91-7.
26 //
27
28 #ifndef _math_optimize_transform_h
29 #define _math_optimize_transform_h
30
31 #ifdef __GNUC__
32 #pragma interface
33 #endif
34
35 #include <math/scmat/matrix.h>
36
37 namespace sc {
38
42 class NonlinearTransform: public RefCount {
43 protected:
44 // The linear part of the nonlinear transform. This must
45 // be initialized by derived classes in their
46 // transform_coordinates routine (or the transform
47 // members must be overridden so it is ignored).
48 RefSCMatrix linear_transform_;
49 public:
50 ~NonlinearTransform();
51
53 virtual void transform_coordinates(const RefSCVector& x) = 0;
57 virtual void transform_gradient(const RefSCVector& g);
61 virtual void transform_hessian(const RefSymmSCMatrix& h);
65 virtual void transform_ihessian(const RefSymmSCMatrix &ih);
66 };
67
68
69
73 class IdentityTransform: public NonlinearTransform {
74 public:
75 ~IdentityTransform();
76
79 void transform_coordinates(const RefSCVector& x);
80 void transform_gradient(const RefSCVector& g);
81 void transform_hessian(const RefSymmSCMatrix& h);
82 void transform_ihessian(const RefSymmSCMatrix &ih);
83 };
84
85 }
86
87 #endif
88
89 // Local Variables:
90 // mode: c++
91 // c-file-style: "CLJ"
92 // End: