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[project @ 1993-08-08 01:20:23 by jwe] Initial revision
author jwe
date Sun, 08 Aug 1993 01:21:46 +0000
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children 780cbbc57b7c
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2:c0190df9885d 3:9a4c07481e61
1 // ODE.h -*- C++ -*-
2 /*
3
4 Copyright (C) 1992, 1993 John W. Eaton
5
6 This file is part of Octave.
7
8 Octave is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any
11 later version.
12
13 Octave is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with Octave; see the file COPYING. If not, write to the Free
20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21
22 */
23
24 #if !defined (_ODE_h)
25 #define _ODE_h 1
26
27 #ifdef __GNUG__
28 #pragma interface
29 #endif
30
31 #include <iostream.h>
32 #include "ODEFunc.h"
33 #include "Matrix.h"
34
35 class ODE : public ODEFunc
36 {
37 public:
38
39 ODE (void);
40
41 ODE (int n);
42
43 ODE (const ColumnVector& state, double time, const ODEFunc& f);
44
45 virtual ~ODE (void);
46
47 virtual int size (void) const;
48 virtual ColumnVector state (void) const;
49 virtual double time (void) const;
50
51 virtual void force_restart (void);
52 virtual void initialize (const ColumnVector& x, double t);
53 virtual void set_stop_time (double t);
54 virtual void clear_stop_time (void);
55
56 virtual ColumnVector integrate (double t);
57
58 void integrate (int nsteps, double tstep, ostream& s);
59
60 Matrix integrate (const ColumnVector& tout);
61 Matrix integrate (const ColumnVector& tout, const ColumnVector& tcrit);
62
63 protected:
64
65 /*
66 * Some of this is probably too closely related to LSODE, but hey,
67 * this is just a first attempt...
68 */
69
70 int n;
71 double t;
72 ColumnVector x;
73
74 double absolute_tolerance;
75 double relative_tolerance;
76
77 double stop_time;
78 int stop_time_set;
79
80 private:
81
82 int restart;
83 int method_flag;
84 int *iwork;
85 double *rwork;
86 int istate;
87 int itol;
88 int itask;
89 int iopt;
90 int liw;
91 int lrw;
92
93 friend int lsode_f (int *neq, double *t, double *y, double *ydot);
94
95 friend int lsode_j (int *neq, double *t, double *y, int *ml, int *mu,
96 double *pd, int *nrowpd);
97
98 };
99
100 #endif
101
102 /*
103 ;;; Local Variables: ***
104 ;;; mode: C++ ***
105 ;;; page-delimiter: "^/\\*" ***
106 ;;; End: ***
107 */