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1 /* |
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2 |
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3 Copyright (C) 2002 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if !defined (octave_DASRT_h) |
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24 #define octave_DASRT_h 1 |
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25 |
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26 #if defined (__GNUG__) |
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27 #pragma interface |
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28 #endif |
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29 |
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30 #include <cfloat> |
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31 #include <cmath> |
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32 |
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33 #include "DAERT.h" |
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34 |
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35 class |
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36 DASRT_options |
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37 { |
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38 public: |
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39 |
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40 DASRT_options (void) { init (); } |
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41 |
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42 DASRT_options (const DASRT_options& opt) { copy (opt); } |
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43 |
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44 DASRT_options& operator = (const DASRT_options& opt) |
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45 { |
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46 if (this != &opt) |
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47 copy (opt); |
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48 |
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49 return *this; |
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50 } |
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51 |
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52 ~DASRT_options (void) { } |
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53 |
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54 void init (void) |
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55 { |
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56 double sqrt_eps = ::sqrt (DBL_EPSILON); |
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57 x_absolute_tolerance = sqrt_eps; |
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58 x_initial_step_size = -1.0; |
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59 x_maximum_step_size = -1.0; |
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60 x_minimum_step_size = 0.0; |
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61 x_relative_tolerance = sqrt_eps; |
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62 x_step_limit = -1; |
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63 } |
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64 |
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65 void copy (const DASRT_options& opt) |
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66 { |
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67 x_absolute_tolerance = opt.x_absolute_tolerance; |
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68 x_initial_step_size = opt.x_initial_step_size; |
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69 x_maximum_step_size = opt.x_maximum_step_size; |
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70 x_minimum_step_size = opt.x_minimum_step_size; |
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71 x_relative_tolerance = opt.x_relative_tolerance; |
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72 x_step_limit = opt.x_step_limit; |
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73 } |
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74 |
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75 void set_default_options (void) { init (); } |
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76 |
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77 void set_absolute_tolerance (double val) |
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78 { x_absolute_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); } |
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79 |
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80 void set_initial_step_size (double val) |
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81 { x_initial_step_size = (val >= 0.0) ? val : -1.0; } |
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82 |
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83 void set_maximum_step_size (double val) |
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84 { x_maximum_step_size = (val >= 0.0) ? val : -1.0; } |
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85 |
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86 void set_minimum_step_size (double val) |
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87 { x_minimum_step_size = (val >= 0.0) ? val : 0.0; } |
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88 |
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89 void set_relative_tolerance (double val) |
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90 { x_relative_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); } |
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91 |
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92 void set_step_limit (int val) |
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93 { x_step_limit = (val >= 0) ? val : -1; } |
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94 |
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95 double absolute_tolerance (void) { return x_absolute_tolerance; } |
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96 |
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97 double initial_step_size (void) { return x_initial_step_size; } |
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98 |
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99 double maximum_step_size (void) { return x_maximum_step_size; } |
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100 |
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101 double minimum_step_size (void) { return x_minimum_step_size; } |
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102 |
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103 double relative_tolerance (void) { return x_relative_tolerance; } |
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104 |
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105 int step_limit (void) { return x_step_limit; } |
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106 |
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107 private: |
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108 |
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109 double x_absolute_tolerance; |
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110 double x_initial_step_size; |
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111 double x_maximum_step_size; |
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112 double x_minimum_step_size; |
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113 double x_relative_tolerance; |
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114 int x_step_limit; |
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115 }; |
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116 |
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117 class |
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118 DASRT_result |
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119 { |
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120 public: |
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121 |
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122 DASRT_result (void) { } |
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123 |
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124 DASRT_result (const Matrix& xx, const Matrix& xxdot, const ColumnVector& tt) |
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125 : x (xx), xdot (xxdot), t (tt) { } |
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126 |
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127 DASRT_result (const DASRT_result& r) |
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128 : x (r.x), xdot (r.xdot), t (r.t) { } |
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129 |
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130 DASRT_result& operator = (const DASRT_result& r) |
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131 { |
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132 if (this != &r) |
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133 { |
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134 x = r.x; |
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135 xdot = r.xdot; |
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136 t = r.t; |
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137 } |
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138 return *this; |
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139 } |
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140 |
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141 ~DASRT_result (void) { } |
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142 |
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143 Matrix state (void) const { return x; } |
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144 Matrix deriv (void) const { return xdot; } |
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145 ColumnVector times (void) const { return t; } |
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146 |
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147 private: |
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148 |
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149 Matrix x; |
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150 Matrix xdot; |
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151 ColumnVector t; |
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152 }; |
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153 |
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154 class |
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155 DASRT : public DAERT, public DASRT_options |
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156 { |
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157 public: |
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158 |
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159 DASRT (void); |
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160 |
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161 DASRT (const ColumnVector& state, double time, DAERTFunc& f); |
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162 |
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3992
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163 DASRT (const ColumnVector& state, const ColumnVector& deriv, |
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164 double time, DAERTFunc& f); |
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165 |
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166 ~DASRT (void) { } |
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167 |
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168 DASRT_result integrate (const ColumnVector& tout); |
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169 |
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170 DASRT_result integrate (const ColumnVector& tout, |
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171 const ColumnVector& tcrit); |
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172 |
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173 std::string error_message (void) const; |
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174 |
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175 private: |
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176 |
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177 bool initialized; |
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178 |
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179 bool sanity_checked; |
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180 |
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181 int liw; |
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182 int lrw; |
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183 int idid; |
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184 |
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185 int n; |
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186 int ng; |
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187 |
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188 Array<int> info; |
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189 Array<int> iwork; |
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190 Array<int> jroot; |
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191 |
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192 Array<double> rwork; |
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193 |
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194 double abs_tol; |
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195 double rel_tol; |
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196 |
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3994
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197 double *px; |
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198 double *pxdot; |
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199 int *pinfo; |
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200 int *piwork; |
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201 double *prwork; |
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202 int *pjroot; |
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203 |
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204 void integrate (double t); |
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205 }; |
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206 |
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207 #endif |
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208 |
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209 /* |
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210 ;;; Local Variables: *** |
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211 ;;; mode: C++ *** |
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212 ;;; End: *** |
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213 */ |
