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/*===========================================================================
Copyright (C) 2019-2020 Andriy Andreykiv, Konstantinos Poulios.
This file is a part of GetFEM
GetFEM 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 along with the GCC Runtime Library
Exception either version 3.1 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 Lesser General Public
License and GCC Runtime Library Exception for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
===========================================================================*/
#include "getfem/getfem_generic_assembly.h"
#include "getfem/getfem_regular_meshes.h"
int main(int argc, char *argv[]) {
GETFEM_MPI_INIT(argc, argv);
GMM_SET_EXCEPTION_DEBUG; // Exceptions make a memory fault, to debug.
FE_ENABLE_EXCEPT; // Enable floating point exception for Nan.
bgeot::md_param PARAM;
PARAM.add_int_param("N", 10);
PARAM.add_real_param("RESULT", 0.04478308527);
PARAM.read_command_line(argc, argv);
size_t N = PARAM.int_value("N", "Number of elements");
double RESULT = PARAM.real_value("RESULT", "Expected result");
getfem::mesh m;
getfem::regular_unit_mesh(m, {N, N}, bgeot::geometric_trans_descriptor("GT_QK(2, 2)"));
getfem::mesh_fem mf(m);
mf.set_classical_finite_element(2);
getfem::mesh_im mim(m);
mim.set_integration_method(3);
bgeot::multi_index scalarSize(0);
getfem::im_data imd(mim, scalarSize, -1);
std::vector<double> v(mf.nb_dof()), u(mf.nb_dof()), d(imd.nb_index());
getfem::ga_workspace w;
w.set_assembled_vector(v);
w.add_fem_variable("u", mf, gmm::sub_interval(0, mf.nb_dof()), u);
w.add_im_data("d", imd, d);
w.add_assignment_expression("d", "Norm(X)", -1, 1, true);
w.add_expression("d * Test_u", mim, -1);
w.assembly(1);
GETFEM_MPI_FINALIZE;
return (gmm::abs(gmm::vect_norm2(v) - RESULT) < 1e-10) ? 0 : 1;
}
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