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test_interpolate.cc
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test_interpolate.cc
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/**
* @file test_interpolate.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Sep 03 2010
* @date last modification: Thu Oct 15 2015
*
* @brief test of the fem class
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014, 2015 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 "fe_engine.hh"
#include "shape_lagrange.hh"
#include "integrator_gauss.hh"
/* -------------------------------------------------------------------------- */
#include <cstdlib>
#include <iostream>
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char *argv[]) {
akantu::initialize(argc, argv);
debug::setDebugLevel(dblTest);
const ElementType type = TYPE;
UInt dim = ElementClass<type>::getSpatialDimension();
Real eps = 3e-13;
std::cout << "Epsilon : " << eps << std::endl;
Mesh my_mesh(dim);
std::stringstream meshfilename; meshfilename << type << ".msh";
my_mesh.read(meshfilename.str());
FEEngine *fem = new FEEngineTemplate<IntegratorGauss,ShapeLagrange>(my_mesh, dim, "my_fem");
fem->initShapeFunctions();
Array<Real> const_val(fem->getMesh().getNbNodes(), 2, "const_val");
UInt nb_element = my_mesh.getNbElement(type);
UInt nb_quadrature_points = fem->getNbIntegrationPoints(type) * nb_element;
Array<Real> val_on_quad(nb_quadrature_points, 2, "val_on_quad");
for (UInt i = 0; i < const_val.size(); ++i) {
const_val.storage()[i * 2 + 0] = 1.;
const_val.storage()[i * 2 + 1] = 2.;
}
fem->interpolateOnIntegrationPoints(const_val, val_on_quad, 2, type);
std::cout << "Interpolation of array : " << const_val << std::endl;
std::cout << "Gives on quads : " << val_on_quad << std::endl;
// interpolate coordinates
Array<Real> coord_on_quad(nb_quadrature_points, my_mesh.getSpatialDimension(), "coord_on_quad");
fem->interpolateOnIntegrationPoints(my_mesh.getNodes(),
coord_on_quad,
my_mesh.getSpatialDimension(),
type);
std::cout << "Interpolations of node coordinates : " << my_mesh.getNodes() << std::endl;
std::cout << "Gives : " << coord_on_quad << std::endl;
delete fem;
finalize();
return EXIT_SUCCESS;
}

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