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1 // ODE.h -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1992, 1993, 1994 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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382
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24 #if !defined (octave_ODE_h) |
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25 #define octave_ODE_h 1 |
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26 |
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27 extern "C++" { |
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28 |
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29 class ostream; |
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30 |
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238
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31 #include "Matrix.h" |
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32 #include "ODEFunc.h" |
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33 |
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34 class ODE_options |
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35 { |
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36 public: |
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37 |
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38 ODE_options (void); |
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39 ODE_options (const ODE_options& opt); |
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40 |
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41 ODE_options& operator = (const ODE_options& opt); |
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42 |
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43 ~ODE_options (void); |
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44 |
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45 void init (void); |
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46 void copy (const ODE_options& opt); |
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47 |
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48 void set_default_options (void); |
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49 |
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50 void set_absolute_tolerance (double); |
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51 void set_initial_step_size (double); |
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52 void set_maximum_step_size (double); |
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53 void set_minimum_step_size (double); |
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54 void set_relative_tolerance (double); |
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55 |
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56 double absolute_tolerance (void); |
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57 double initial_step_size (void); |
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58 double maximum_step_size (void); |
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59 double minimum_step_size (void); |
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60 double relative_tolerance (void); |
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61 |
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62 private: |
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63 |
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64 double x_absolute_tolerance; |
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65 double x_initial_step_size; |
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66 double x_maximum_step_size; |
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67 double x_minimum_step_size; |
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68 double x_relative_tolerance; |
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69 }; |
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70 |
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71 class ODE : public ODEFunc, public ODE_options |
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72 { |
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73 public: |
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74 |
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75 ODE (void); |
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76 |
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77 ODE (int n); |
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78 |
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79 ODE (const ColumnVector& state, double time, const ODEFunc& f); |
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80 |
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81 virtual ~ODE (void); |
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82 |
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83 virtual int size (void) const; |
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84 virtual ColumnVector state (void) const; |
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85 virtual double time (void) const; |
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86 |
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87 virtual void force_restart (void); |
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88 virtual void initialize (const ColumnVector& x, double t); |
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89 virtual void set_stop_time (double t); |
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90 virtual void clear_stop_time (void); |
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91 |
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92 virtual ColumnVector integrate (double t); |
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93 |
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94 void integrate (int nsteps, double tstep, ostream& s); |
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95 |
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96 Matrix integrate (const ColumnVector& tout); |
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97 Matrix integrate (const ColumnVector& tout, const ColumnVector& tcrit); |
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98 |
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99 protected: |
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100 |
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101 /* |
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102 * Some of this is probably too closely related to LSODE, but hey, |
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103 * this is just a first attempt... |
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104 */ |
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105 |
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106 int n; |
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107 double t; |
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108 ColumnVector x; |
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109 |
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110 double stop_time; |
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111 int stop_time_set; |
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112 |
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113 private: |
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114 |
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115 int integration_error; |
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116 int restart; |
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117 int method_flag; |
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118 int *iwork; |
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119 double *rwork; |
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120 int istate; |
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121 int itol; |
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122 int itask; |
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123 int iopt; |
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124 int liw; |
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125 int lrw; |
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126 |
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127 friend int lsode_f (int *neq, double *t, double *y, double *ydot); |
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128 |
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129 friend int lsode_j (int *neq, double *t, double *y, int *ml, int *mu, |
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130 double *pd, int *nrowpd); |
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131 |
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132 }; |
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133 |
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134 } // extern "C++" |
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135 |
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136 #endif |
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137 |
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138 /* |
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139 ;;; Local Variables: *** |
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140 ;;; mode: C++ *** |
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141 ;;; page-delimiter: "^/\\*" *** |
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142 ;;; End: *** |
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143 */ |
