[5fe2a1]: / src / DirichletBC.cc  Maximize  Restore  History

Download this file

95 lines (79 with data), 3.3 kB

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
/*
Copyright (C) 2013 Marco Vassallo <gedeone-octave@users.sourceforge.net>
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "boundarycondition.h"
#include "functionspace.h"
#include "expression.h"
DEFUN_DLD (DirichletBC, args, , "-*- texinfo -*-\n\
@deftypefn {Function File} {[@var{bc}]} = \
DirichletBC (@var{Functional Space}, @var{Boundary Label}, @var{Function handle}) \n\
The input parameters are\n\
@itemize @bullet \n\
@item @var{Functional Space} is a fem-fenics functional space where\
we want to apply the BC\n\
@item @var{Function handle} is a function handle which contains the expression\
that we want to apply as BC. If we have a Vector field, we can just use a\n\
vector of function handle: @var{Function handle} = ['@'(x, y) f1, '@'(x, y) f2, ...]\n\
@item @var{Boundary} is an Array which contains the labels of the \
sides where the BC is applied\n\
@end itemize\n\
The output @var{BC} is an object which contains the boundary conditions\n\
@seealso{Mesh, FunctionSpace}\n\
@end deftypefn")
{
int nargin = args.length ();
octave_value retval;
if (nargin < 3 || nargin > 3)
print_usage ();
else
{
if (! functionspace_type_loaded)
{
functionspace::register_type ();
functionspace_type_loaded = true;
mlock ();
}
if (! boundarycondition_type_loaded)
{
boundarycondition::register_type ();
boundarycondition_type_loaded = true;
mlock ();
}
if (args(0).type_id () == functionspace::static_type_id ())
{
const functionspace & fspo = static_cast<const functionspace&> (args(0).get_rep ());
octave_fcn_handle * fh = args(1).fcn_handle_value ();
Array<octave_idx_type> side = args(2).array_value ();
if (!error_state)
{
std::cout <<"Building essential boundary condition..."<< std::endl;
const boost::shared_ptr <const dolfin::FunctionSpace> & V (fspo.get_pfsp ());
octave_value_list b (3, 1);
octave_value_list tmp = feval (fh->function_value (), b);
Array<double> res = tmp(0).array_value ();
std::size_t l = res.length ();
expression * pf;
if (l > 1)
pf = new expression (*fh, l);
else
pf = new expression (*fh);
boost::shared_ptr<const expression> f (pf);
boundarycondition * pbc = new boundarycondition ();
for (octave_idx_type i = 0; i < side.length (); ++i)
pbc->add_bc (V, f, side(i));
retval = octave_value (pbc);
}
}
}
return retval;
}