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/*
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{FunctionSpace}, @var{Boundary_Label},\
@var{Function_handle}) \n\
Specify essential boundary condition on a specific side.\n\
The input parameters are\n\
@itemize @bullet \n\
@item @var{FunctionSpace} is the fem-fenics 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 a BC. If we have a Vector field, we can just use a\n\
vector of function handles: \
@var{Function handle} = [@(x, y) f1, @(x, y) f2, ...]\n\
@item @var{Boundary_Label} is an Array which contains the label(s) of the \
side(s) where the BC has to be 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)
{
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;
}