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test_integrate_tetrahedron_4.cc
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Mon, Sep 9, 15:26
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rAKA akantu
test_integrate_tetrahedron_4.cc
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/**
* @file test_integrate_tetrahedron_4.cc
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Mon Jul 19 10:55:49 2010
*
* @brief test of the fem class
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include <cstdlib>
#include <fstream>
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "fem.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "integrator_gauss.hh"
#include "shape_lagrange.hh"
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
int
main
(
int
argc
,
char
*
argv
[])
{
UInt
dim
=
3
;
ElementType
type
=
_tetrahedron_4
;
MeshIOMSH
mesh_io
;
Mesh
my_mesh
(
dim
);
mesh_io
.
read
(
"cube1.msh"
,
my_mesh
);
FEM
*
fem
=
new
FEMTemplate
<
IntegratorGauss
,
ShapeLagrange
>
(
my_mesh
,
dim
,
"my_fem"
);
debug
::
_debug_level
=
dblDump
;
fem
->
initShapeFunctions
();
std
::
cout
<<
*
fem
<<
std
::
endl
;
StaticMemory
*
st_mem
=
StaticMemory
::
getStaticMemory
();
std
::
cout
<<
*
st_mem
<<
std
::
endl
;
Vector
<
Real
>
const_val
(
fem
->
getMesh
().
getNbNodes
(),
2
,
"const_val"
);
Vector
<
Real
>
val_on_quad
(
0
,
2
,
"val_on_quad"
);
for
(
UInt
i
=
0
;
i
<
const_val
.
getSize
();
++
i
)
{
const_val
.
values
[
i
*
2
+
0
]
=
1.
;
const_val
.
values
[
i
*
2
+
1
]
=
2.
;
}
//interpolate function on quadrature points
fem
->
interpolateOnQuadraturePoints
(
const_val
,
val_on_quad
,
2
,
type
);
//integrate function on elements
akantu
::
Vector
<
akantu
::
Real
>
int_val_on_elem
(
0
,
2
,
"int_val_on_elem"
);
fem
->
integrate
(
val_on_quad
,
int_val_on_elem
,
2
,
type
);
// get global integration value
Real
value
[
2
]
=
{
0
,
0
};
std
::
ofstream
my_file
(
"out.txt"
);
my_file
<<
int_val_on_elem
<<
std
::
endl
;
for
(
UInt
i
=
0
;
i
<
fem
->
getMesh
().
getNbElement
(
type
);
++
i
)
{
value
[
0
]
+=
int_val_on_elem
.
values
[
2
*
i
];
value
[
1
]
+=
int_val_on_elem
.
values
[
2
*
i
+
1
];
}
my_file
<<
"integral is "
<<
value
[
0
]
<<
" "
<<
value
[
1
]
<<
std
::
endl
;
delete
fem
;
finalize
();
return
EXIT_SUCCESS
;
}
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