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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 class ostream; |
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28 |
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29 #include "dMatrix.h" |
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30 #include "dColVector.h" |
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31 #include "ODEFunc.h" |
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32 |
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384
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33 extern "C++" { |
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34 |
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35 class ODE_options |
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36 { |
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37 public: |
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38 |
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39 ODE_options (void); |
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40 ODE_options (const ODE_options& opt); |
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41 |
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42 ODE_options& operator = (const ODE_options& opt); |
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43 |
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44 ~ODE_options (void); |
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45 |
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46 void init (void); |
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47 void copy (const ODE_options& opt); |
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48 |
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49 void set_default_options (void); |
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50 |
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51 void set_absolute_tolerance (double); |
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52 void set_initial_step_size (double); |
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53 void set_maximum_step_size (double); |
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54 void set_minimum_step_size (double); |
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55 void set_relative_tolerance (double); |
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56 |
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57 double absolute_tolerance (void); |
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58 double initial_step_size (void); |
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59 double maximum_step_size (void); |
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60 double minimum_step_size (void); |
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61 double relative_tolerance (void); |
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62 |
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63 private: |
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64 |
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65 double x_absolute_tolerance; |
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66 double x_initial_step_size; |
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67 double x_maximum_step_size; |
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68 double x_minimum_step_size; |
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69 double x_relative_tolerance; |
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70 }; |
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71 |
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72 class ODE : public ODEFunc, public ODE_options |
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73 { |
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74 public: |
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75 |
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76 ODE (void); |
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77 |
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78 ODE (int n); |
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79 |
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80 ODE (const ColumnVector& state, double time, const ODEFunc& f); |
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81 |
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82 virtual ~ODE (void); |
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83 |
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84 virtual int size (void) const; |
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85 virtual ColumnVector state (void) const; |
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86 virtual double time (void) const; |
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87 |
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88 virtual void force_restart (void); |
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89 virtual void initialize (const ColumnVector& x, double t); |
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90 virtual void set_stop_time (double t); |
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91 virtual void clear_stop_time (void); |
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92 |
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93 virtual ColumnVector integrate (double t); |
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94 |
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95 void integrate (int nsteps, double tstep, ostream& s); |
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96 |
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97 Matrix integrate (const ColumnVector& tout); |
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98 Matrix integrate (const ColumnVector& tout, const ColumnVector& tcrit); |
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99 |
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100 protected: |
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101 |
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102 /* |
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103 * Some of this is probably too closely related to LSODE, but hey, |
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104 * this is just a first attempt... |
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105 */ |
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106 |
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107 int n; |
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108 double t; |
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109 ColumnVector x; |
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110 |
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111 double stop_time; |
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112 int stop_time_set; |
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113 |
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114 private: |
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115 |
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116 int integration_error; |
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117 int restart; |
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118 int method_flag; |
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119 int *iwork; |
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120 double *rwork; |
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121 int istate; |
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122 int itol; |
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123 int itask; |
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124 int iopt; |
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125 int liw; |
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126 int lrw; |
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127 |
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128 friend int lsode_f (int *neq, double *t, double *y, double *ydot); |
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129 |
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130 friend int lsode_j (int *neq, double *t, double *y, int *ml, int *mu, |
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131 double *pd, int *nrowpd); |
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132 |
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133 }; |
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134 |
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135 } // extern "C++" |
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136 |
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137 #endif |
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138 |
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139 /* |
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140 ;;; Local Variables: *** |
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141 ;;; mode: C++ *** |
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142 ;;; page-delimiter: "^/\\*" *** |
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143 ;;; End: *** |
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144 */ |
