|
1841
|
1 // DASSL.h -*- C++ -*- |
|
|
2 /* |
|
|
3 |
|
|
4 Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
|
|
21 |
|
|
22 */ |
|
|
23 |
|
|
24 #if !defined (octave_DASSL_h) |
|
|
25 #define octave_DASSL_h 1 |
|
|
26 |
|
|
27 #if defined (__GNUG__) |
|
|
28 #pragma interface |
|
|
29 #endif |
|
|
30 |
|
1871
|
31 #include <cfloat> |
|
1868
|
32 #include <cmath> |
|
|
33 |
|
1841
|
34 #include "DAE.h" |
|
|
35 |
|
1868
|
36 class |
|
|
37 DASSL_options |
|
1841
|
38 { |
|
1868
|
39 public: |
|
|
40 |
|
|
41 DASSL_options (void) { init (); } |
|
1841
|
42 |
|
1868
|
43 DASSL_options (const DASSL_options& opt) { copy (opt); } |
|
|
44 |
|
|
45 DASSL_options& operator = (const DASSL_options& opt) |
|
|
46 { |
|
|
47 if (this != &opt) |
|
|
48 copy (opt); |
|
1841
|
49 |
|
1868
|
50 return *this; |
|
|
51 } |
|
|
52 |
|
|
53 ~DASSL_options (void) { } |
|
1841
|
54 |
|
1868
|
55 void init (void) |
|
|
56 { |
|
|
57 double sqrt_eps = sqrt (DBL_EPSILON); |
|
|
58 x_absolute_tolerance = sqrt_eps; |
|
|
59 x_initial_step_size = -1.0; |
|
|
60 x_maximum_step_size = -1.0; |
|
|
61 x_minimum_step_size = 0.0; |
|
|
62 x_relative_tolerance = sqrt_eps; |
|
|
63 } |
|
1841
|
64 |
|
1868
|
65 void copy (const DASSL_options& opt) |
|
|
66 { |
|
|
67 x_absolute_tolerance = opt.x_absolute_tolerance; |
|
|
68 x_initial_step_size = opt.x_initial_step_size; |
|
|
69 x_maximum_step_size = opt.x_maximum_step_size; |
|
|
70 x_minimum_step_size = opt.x_minimum_step_size; |
|
|
71 x_relative_tolerance = opt.x_relative_tolerance; |
|
|
72 } |
|
1841
|
73 |
|
1868
|
74 void set_default_options (void) { init (); } |
|
|
75 |
|
|
76 void set_absolute_tolerance (double val) |
|
|
77 { x_absolute_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); } |
|
|
78 |
|
|
79 void set_initial_step_size (double val) |
|
|
80 { x_initial_step_size = (val >= 0.0) ? val : -1.0; } |
|
1841
|
81 |
|
1868
|
82 void set_maximum_step_size (double val) |
|
|
83 { x_maximum_step_size = (val >= 0.0) ? val : -1.0; } |
|
|
84 |
|
|
85 void set_minimum_step_size (double val) |
|
|
86 { x_minimum_step_size = (val >= 0.0) ? val : 0.0; } |
|
|
87 |
|
|
88 void set_relative_tolerance (double val) |
|
|
89 { x_relative_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); } |
|
1841
|
90 |
|
1868
|
91 double absolute_tolerance (void) { return x_absolute_tolerance; } |
|
|
92 |
|
|
93 double initial_step_size (void) { return x_initial_step_size; } |
|
|
94 |
|
|
95 double maximum_step_size (void) { return x_maximum_step_size; } |
|
|
96 |
|
|
97 double minimum_step_size (void) { return x_minimum_step_size; } |
|
|
98 |
|
|
99 double relative_tolerance (void) { return x_relative_tolerance; } |
|
|
100 |
|
|
101 private: |
|
1841
|
102 |
|
|
103 double x_absolute_tolerance; |
|
|
104 double x_initial_step_size; |
|
|
105 double x_maximum_step_size; |
|
|
106 double x_minimum_step_size; |
|
|
107 double x_relative_tolerance; |
|
|
108 }; |
|
|
109 |
|
1868
|
110 class |
|
|
111 DASSL : public DAE, public DASSL_options |
|
1841
|
112 { |
|
|
113 public: |
|
|
114 |
|
|
115 DASSL (void); |
|
|
116 |
|
|
117 DASSL (const ColumnVector& x, double time, DAEFunc& f); |
|
|
118 |
|
|
119 DASSL (const ColumnVector& x, const ColumnVector& xdot, |
|
|
120 double time, DAEFunc& f); |
|
|
121 |
|
1945
|
122 ~DASSL (void) { } |
|
1841
|
123 |
|
|
124 void force_restart (void); |
|
|
125 |
|
|
126 void set_stop_time (double t); |
|
|
127 void clear_stop_time (void); |
|
|
128 |
|
|
129 ColumnVector do_integrate (double t); |
|
|
130 |
|
|
131 Matrix do_integrate (const ColumnVector& tout); |
|
|
132 |
|
|
133 Matrix integrate (const ColumnVector& tout, Matrix& xdot_out); |
|
|
134 |
|
|
135 Matrix integrate (const ColumnVector& tout, Matrix& xdot_out, |
|
|
136 const ColumnVector& tcrit); |
|
|
137 |
|
|
138 private: |
|
|
139 |
|
|
140 double stop_time; |
|
|
141 int stop_time_set; |
|
|
142 |
|
|
143 int n; |
|
|
144 int integration_error; |
|
|
145 int restart; |
|
|
146 int liw; |
|
|
147 int lrw; |
|
|
148 int idid; |
|
1945
|
149 Array<int> info; |
|
|
150 Array<int> iwork; |
|
|
151 Array<double> rwork; |
|
1841
|
152 |
|
|
153 friend int ddassl_j (double *time, double *state, double *deriv, |
|
|
154 double *pd, double *cj, double *rpar, int *ipar); |
|
|
155 |
|
|
156 friend int ddassl_f (double *time, double *state, double *deriv, |
|
|
157 double *delta, int *ires, double *rpar, int *ipar); |
|
|
158 |
|
|
159 }; |
|
|
160 |
|
|
161 #endif |
|
|
162 |
|
|
163 /* |
|
|
164 ;;; Local Variables: *** |
|
|
165 ;;; mode: C++ *** |
|
|
166 ;;; page-delimiter: "^/\\*" *** |
|
|
167 ;;; End: *** |
|
|
168 */ |
