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test_regular_grid_triangle_3.cc
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Sun, May 19, 18:46

test_regular_grid_triangle_3.cc
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/**
* @file test_regular_grid_triangle_3.cc
* @author David Kammer <david.kammer@epfl.ch>
* @date Tue Oct 26 16:58:42 2010
*
* @brief test regular grid neighbor structure for 3d case
*
* @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 "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "mesh_utils.hh"
#include "solid_mechanics_model.hh"
#include "material.hh"
#include "contact.hh"
#include "contact_rigid.hh"
#include "contact_neighbor_structure.hh"
#ifdef AKANTU_USE_IOHELPER
# include "io_helper.h"
#endif //AKANTU_USE_IOHELPER
using namespace akantu;
int main(int argc, char *argv[])
{
akantu::initialize(&argc, &argv);
int dim = 2;
/// load mesh
Mesh my_mesh(dim);
MeshIOMSH mesh_io;
mesh_io.read("squares.msh", my_mesh);
/// build facet connectivity and surface id
MeshUtils::buildFacets(my_mesh,1,0);
MeshUtils::buildSurfaceID(my_mesh);
unsigned int nb_nodes = my_mesh.getNbNodes();
/// dump surface information to paraview
#ifdef AKANTU_USE_IOHELPER
DumperParaview dumper;
dumper.SetMode(TEXT);
dumper.SetPoints(my_mesh.getNodes().values, dim, nb_nodes, "triangle_3_test-surface-extraction");
dumper.SetConnectivity((int*)my_mesh.getConnectivity(_triangle_3).values,
TRIANGLE1, my_mesh.getNbElement(_triangle_3), C_MODE);
dumper.SetPrefix("paraview/");
dumper.Init();
dumper.Dump();
#endif //AKANTU_USE_IOHELPER
/// declaration of model
SolidMechanicsModel my_model(my_mesh);
/// model initialization
my_model.initVectors();
/// initialize the vectors
memset(my_model.getForce().values, 0, dim*nb_nodes*sizeof(Real));
memset(my_model.getVelocity().values, 0, dim*nb_nodes*sizeof(Real));
memset(my_model.getAcceleration().values, 0, dim*nb_nodes*sizeof(Real));
memset(my_model.getDisplacement().values, 0, dim*nb_nodes*sizeof(Real));
my_model.initModel();
my_model.readMaterials("material.dat");
my_model.initMaterials();
Real time_step = my_model.getStableTimeStep();
my_model.setTimeStep(time_step/10.);
my_model.assembleMassLumped();
/// contact declaration
Contact * contact = Contact::newContact(my_model,
_ct_rigid,
_cst_2d_expli,
_cnst_regular_grid);
ContactRigid * my_contact = dynamic_cast<ContactRigid *>(contact);
my_contact->initContact(false);
Surface master = 0;
Surface impactor = 1;
my_contact->addMasterSurface(master);
my_contact->addImpactorSurfaceToMasterSurface(impactor, master);
my_model.updateCurrentPosition(); // neighbor structure uses current position for init
my_contact->initNeighborStructure(master);
const NeighborList & my_neighbor_list = my_contact->getContactSearch().getContactNeighborStructure(master).getNeighborList();
UInt nb_nodes_neigh = my_neighbor_list.impactor_nodes.getSize();
Vector<UInt> impact_nodes = my_neighbor_list.impactor_nodes;
UInt * impact_nodes_val = impact_nodes.values;
UInt * node_to_elem_offset_val = my_neighbor_list.facets_offset(_segment_2).storage();
UInt * node_to_elem_val = my_neighbor_list.facets(_segment_2).storage();
/// print impactor nodes
std::cout << "we have " << nb_nodes_neigh << " impactor nodes:" << std::endl;
for (UInt i = 0; i < nb_nodes_neigh; ++i) {
std::cout << " node " << impact_nodes_val[i] << " : ";
for (UInt j = node_to_elem_offset_val[i]; j < node_to_elem_offset_val[i+1]; ++j)
std::cout << node_to_elem_val[j] << " ";
std::cout << std::endl;
}
std::cout << std::endl;
#ifdef AKANTU_USE_IOHELPER
DumperParaview dumper_neighbor;
dumper_neighbor.SetMode(TEXT);
dumper_neighbor.SetPoints(my_mesh.getNodes().values, dim, nb_nodes, "triangle_3_test-neighbor-elements");
dumper_neighbor.SetConnectivity((int *)my_mesh.getConnectivity(_segment_2).values,
LINE1, my_mesh.getNbElement(_segment_2), C_MODE);
double * neigh_elem = new double [my_mesh.getNbElement(_segment_2)];
for (UInt i = 0; i < my_mesh.getNbElement(_segment_2); ++i)
neigh_elem[i] = 0.0;
UInt visualize_node = 1;
UInt n = impact_nodes_val[visualize_node];
std::cout << "plot for node: " << n << std::endl;
for (UInt i = node_to_elem_offset_val[visualize_node]; i < node_to_elem_offset_val[visualize_node+1]; ++i)
neigh_elem[node_to_elem_val[i]] = 1.;
dumper_neighbor.AddElemDataField(neigh_elem, 1, "neighbor id");
dumper_neighbor.SetPrefix("paraview/");
dumper_neighbor.Init();
dumper_neighbor.Dump();
delete [] neigh_elem;
#endif //AKANTU_USE_IOHELPER
finalize();
return EXIT_SUCCESS;
}

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