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annotate src/assemble_system.cc @ 268:61830a4f9ab9

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Improve formatting
author Eugenio Gianniti <eugenio.gianniti@mail.polimi.it>
date Thu, 14 Aug 2014 12:26:55 +0200
parents 5e9b5bbdc56b
children f4d6ae912a08
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1 /*
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2 Copyright (C) 2013 Marco Vassallo <gedeone-octave@users.sourceforge.net>
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3
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4 This program is free software; you can redistribute it and/or modify it under
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5 the terms of the GNU General Public License as published by the Free Software
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6 Foundation; either version 3 of the License, or (at your option) any later
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7 version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT
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10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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12 details.
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13
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14 You should have received a copy of the GNU General Public License along with
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15 this program; if not, see <http://www.gnu.org/licenses/>.
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16 */
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17
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18 #include "form.h"
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19 #include "boundarycondition.h"
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20 #include "femfenics_factory.h"
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21 #include "dolfin_compat.h"
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22
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23 DEFUN_DLD (assemble_system, args, nargout,
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24 "-*- texinfo -*-\n\
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25 @deftypefn {Function File} {[@var{A}], [@var{b}], [@var{x}(Optional)]} = \
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26 assemble_system (@var{form_a}, @var{form_L}, @var{DirichletBC})\n\
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27 Construct the discretization of a system and apply essential BC.\n\
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28 The input arguments are\n\
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29 @itemize @bullet\n\
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30 @item @var{form_a} which is the BilinearForm to assemble.\n\
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31 @item @var{form_L} which is the LinearForm to assemble.\n\
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32 @item @var{DirichletBC} represents the optional BC applied to \
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33 the system. \n\
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34 @end itemize \n\
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35 The output @var{A} is a matrix representing the @var{form_a} while \
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36 @var{b} represents @var{form_L}. \n\
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37 If boundary conditions have to be applied to a vector for a nonlinear problem \
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38 then it should be provide as 3rd argument and it will be given back \
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39 as the 3rd output argument. For an example of this situation, please refer \
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40 to the HyperElasticity example. \n\
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41 @seealso{BilinearForm, LinearForm, ResidualForm, JacobianForm, Functional}\n\
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42 @end deftypefn")
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43 {
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44 int nargin = args.length ();
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45 octave_value_list retval;
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46 if (! form_type_loaded)
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47 {
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48 form::register_type ();
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49 form_type_loaded = true;
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50 mlock ();
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51 }
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52
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53 if (! boundarycondition_type_loaded)
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54 {
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55 boundarycondition::register_type ();
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56 boundarycondition_type_loaded = true;
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57 mlock ();
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58 }
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59
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60 if (nargout == 2)
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61 {
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62 if (nargin < 2)
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63 { print_usage (); }
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64 else
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65 {
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67 if (args(0).type_id () == form::static_type_id ()
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68 && args(1).type_id () == form::static_type_id ())
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69 {
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70 const form & frm1 =
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71 static_cast<const form &> (args(0).get_rep ());
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72 const form & frm2 =
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73 static_cast<const form &> (args(1).get_rep ());
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74
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75 if (! error_state)
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76 {
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77 const dolfin::Form & a = frm1.get_form ();
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78 const dolfin::Form & b = frm2.get_form ();
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79 a.check ();
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80 b.check ();
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81
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82 if (a.rank () == 2 && b.rank () == 1)
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83 {
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84 femfenics_factory factory;
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85
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86 dolfin::Matrix A;
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87 dolfin::assemble (A, a);
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88 dolfin::Vector B;
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89 dolfin::assemble (B, b);
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90
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91 for (std::size_t i = 2; i < nargin; ++i)
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92 {
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93 if (args(i).type_id () ==
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94 boundarycondition::static_type_id ())
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95 {
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96 const boundarycondition & bc
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97 = static_cast<const boundarycondition &>
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98 (args(i).get_rep ());
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99
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100 const std::vector<SHARED_PTR
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101 <const dolfin::DirichletBC> >
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102 & pbc = bc.get_bc ();
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103
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104 for (std::size_t j = 0; j < pbc.size (); ++j)
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105 { pbc[j]->apply (A, B); }
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106 }
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107 else
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108 { error ("assemble_system: unknown argument type"); }
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109 }
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110
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111 retval(0) = factory.matrix (A);
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112 retval(1) = factory.vector (B);
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113 }
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114 }
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115 else
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116 { error ("assemble_system: unknown size"); }
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117 }
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118 }
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119 }
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120 else if (nargout == 3)
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121 {
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122 if (nargin < 3)
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123 { print_usage (); }
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124 else
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125 {
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126 if (args(0).type_id () == form::static_type_id ()
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127 && args(1).type_id () == form::static_type_id ())
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128 {
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129 const form & frm1 =
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130 static_cast<const form &> (args(0).get_rep ());
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131 const form & frm2 =
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132 static_cast<const form &> (args(1).get_rep ());
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133 const Array<double> myx = args(2).array_value ();
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134
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135 if (! error_state)
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136 {
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137 const dolfin::Form & a = frm1.get_form ();
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138 const dolfin::Form & b = frm2.get_form ();
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139 a.check ();
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140 b.check ();
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141
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142 if (a.rank () == 2 && b.rank () == 1)
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143 {
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144 femfenics_factory factory;
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145
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146 dolfin::Matrix A;
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147 dolfin::assemble (A, a);
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148 dolfin::Vector B;
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149 dolfin::assemble (B, b);
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150 #ifdef LATEST_DOLFIN
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151 dolfin::Vector x (MPI_COMM_WORLD, myx.length ());
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152 #else
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153 dolfin::Vector x (myx.length ());
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154 #endif
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155
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156 for (std::size_t i = 0; i < myx.length (); ++i)
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157 { x.setitem (i, myx.xelem (i)); }
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158
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159 for (std::size_t i = 3; i < nargin; ++i)
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160 {
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161 if (args(i).type_id () ==
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162 boundarycondition::static_type_id ())
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163 {
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164 const boundarycondition & bc
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165 = static_cast<const boundarycondition &>
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166 (args(i).get_rep ());
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167
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168 const std::vector<SHARED_PTR
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169 <const dolfin::DirichletBC> >
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170 & pbc = bc.get_bc ();
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171
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172 for (std::size_t j = 0;
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173 j < pbc.size (); ++j)
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174 { pbc[j]->apply (A, B, x); }
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175
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176 }
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177 else
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178 { error ("assemble_system: unknown argument type"); }
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179 }
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180
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181 retval(0) = factory.matrix (A);
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182 retval(1) = factory.vector (B);
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183 retval(2) = factory.vector (x);
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184 }
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185 }
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186 else
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187 { error ("assemble_system: unknown size"); }
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188 }
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189 }
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190 }
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191 return retval;
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192 }