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annotate src/Function.cc @ 151:5fe2a157f4eb

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Update GPL to v3
author gedeone-octave <marcovass89@hotmail.it>
date Wed, 11 Sep 2013 08:50:35 +0200
parents 9486cbdc0a2e
children 67944f307560
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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
46
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18 #include <dolfin.h>
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19 #include "functionspace.h"
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20 #include "function.h"
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21
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22 DEFUN_DLD (Function, args, , "-*- texinfo -*-\n\
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23 @deftypefn {Function File} {[@var{func}]} = \
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24 Function (@var{name}, @var{Functional Space} or @var{Function},\
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25 @var{Vector} or @var{index})\n\
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26 These function can be used in two ways\n\
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27 @itemize @bullet \n\
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28 @item To create a function from a vector. In this case, the arguments are:\n\
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29 @itemize @bullet \n\
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30 @item @var{name} is a string representing the name of the function\n\
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31 @item @var{Functional Space} is the fem-fenics functional space where\
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32 the vector is defined\n\
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33 @item @var{Vector} contains the value of the coefficients\
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34 for the basis functions of @var{Functional Space}\n\
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35 @end itemize\n\
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36 @item To extract a scalar field from a vectorial one\n\
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37 @itemize @bullet \n\
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38 @item @var{name} is a string representing the name of the function\n\
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39 @item @var{Function} is the vector valued Function\n\
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40 @item @var{Index} contains the index of the scalar field to extract.\
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41 Index starts from 1. \n\
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42 @end itemize\n\
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43 @end itemize \n\
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44 The output @var{func} is an object which contain a representation of the\
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45 function @var{Vector} which can be plotted or saved.\n\
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46 @seealso{Constant, Expression, plot, save}\n\
48
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47 @end deftypefn")
46
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48 {
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49
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50 int nargin = args.length ();
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51 octave_value retval;
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52
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53 if (nargin < 3 || nargin > 3)
46
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54 print_usage ();
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55 else
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56 {
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57 if (! functionspace_type_loaded)
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58 {
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59 functionspace::register_type ();
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60 functionspace_type_loaded = true;
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61 mlock ();
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62 }
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63
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64 if (! function_type_loaded)
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65 {
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66 function::register_type ();
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67 function_type_loaded = true;
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68 mlock ();
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69 }
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70
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71 if (args(1).type_id () == functionspace::static_type_id ())
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72 {
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73 std::string str = args(0).string_value ();
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74 const functionspace & fspo =
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75 static_cast<const functionspace&> (args(1).get_rep ());
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76 Array <double> myu = args(2).array_value ();
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77
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78 if (!error_state)
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79 {
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80 const boost::shared_ptr<const dolfin::FunctionSpace> & V = fspo.get_pfsp ();
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81
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82 if (V->dim () != myu.length ())
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83 error ("The size of the functional space and of the vector must agree");
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84 else
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85 {
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86 std::cout <<"creating function from vector..."<< std::endl;
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87 dolfin::Vector du(myu.length ());
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88 for (std::size_t i = 0; i < myu.length (); ++i)
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89 du.setitem (i, myu(i));
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90
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91 boost::shared_ptr<dolfin::Vector> uu (new dolfin::Vector(du));
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92 boost::shared_ptr <const dolfin::Function> u (new dolfin::Function(V, uu));
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93
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94 retval = new function (str, u);
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95 }
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96 }
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97 }
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98 else if (args(1).type_id () == function::static_type_id ())
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99 {
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100 std::string str = args(0).string_value ();
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101 const function & fspo =
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102 static_cast<const function&> (args(1).get_rep ());
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103 int idx = args(2).int_value ();
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104
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105 if (!error_state)
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106 {
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107 const boost::shared_ptr<const dolfin::Function> & f = fspo.get_pfun ();
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108
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109 if (f->value_rank () < 1)
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110 error ("Function: The function you provided isn't a vecotr field");
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111 else
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112 {
119
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113 std::cout <<"Extracting function..."<< std::endl;
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114 if (idx < 1 || idx > f->value_dimension (0))
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115 error ("Function: index out of bounds");
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116 else
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117 {
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118 boost::shared_ptr <const dolfin::Function> u (new dolfin::Function((*f)[idx - 1]));
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119 retval = new function (str, u);
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120 }
87
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121 }
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122 }
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123 }
46
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124 }
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125 return retval;
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126 }