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dumpable_interface.cc
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dumpable_interface.cc
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/**
* @file dumpable_interface.cc
*
* @author Fabian Barras <fabian.barras@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Mon Aug 17 2015
* @date last modification: Tue Sep 29 2020
*
* @brief Example usnig the dumper interface directly
*
*
* @section LICENSE
*
* Copyright (©) 2015-2021 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 "element_group.hh"
#include "group_manager_inline_impl.hh"
#include "mesh.hh"
/* -------------------------------------------------------------------------- */
#include "dumpable_inline_impl.hh"
#include "dumper_iohelper_paraview.hh"
/* -------------------------------------------------------------------------- */
#include "locomotive_tools.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char * argv[]) {
/*
In this example, we present dumpers::Dumpable which is an interface
for other classes who want to dump themselves.
Several classes of Akantu inheritate from Dumpable (Model, Mesh, ...).
In this example we reproduce the same tasks as example_dumper_low_level.cc
using this time Dumpable interface inherted by Mesh, NodeGroup and
ElementGroup.
It is then advised to read first example_dumper_low_level.cc.
*/
initialize(argc, argv);
// To start let us load the swiss train mesh and its mesh data information.
UInt spatial_dimension = 2;
Mesh mesh(spatial_dimension);
mesh.read("swiss_train.msh");
/*
swiss_train.msh has the following physical groups that can be viewed with
GMSH:
"$MeshFormat
2.2 0 8
$EndMeshFormat
$PhysicalNames
6
2 1 "red"
2 2 "white"
2 3 "lwheel_1"
2 4 "lwheel_2"
2 5 "rwheel_2"
2 6 "rwheel_1"
$EndPhysicalNames
..."
*/
// Grouping nodes and elements belonging to train wheels (=four mesh data).
ElementGroup & wheels_elements =
mesh.createElementGroup("wheels", spatial_dimension);
wheels_elements.append(mesh.getElementGroup("lwheel_1"));
wheels_elements.append(mesh.getElementGroup("lwheel_2"));
wheels_elements.append(mesh.getElementGroup("rwheel_1"));
wheels_elements.append(mesh.getElementGroup("rwheel_2"));
const Array<UInt> & lnode_1 =
(mesh.getElementGroup("lwheel_1")).getNodeGroup().getNodes();
const Array<UInt> & lnode_2 =
(mesh.getElementGroup("lwheel_2")).getNodeGroup().getNodes();
const Array<UInt> & rnode_1 =
(mesh.getElementGroup("rwheel_1")).getNodeGroup().getNodes();
const Array<UInt> & rnode_2 =
(mesh.getElementGroup("rwheel_2")).getNodeGroup().getNodes();
Array<Real> & node = mesh.getNodes();
UInt nb_nodes = mesh.getNbNodes();
// This time a 2D Array is created and a padding size of 3 is passed to
// NodalField in order to warp train deformation on Paraview.
Array<Real> displacement(nb_nodes, spatial_dimension);
// Create an ElementTypeMapArray for the colour
ElementTypeMapArray<UInt> colour("colour");
colour.initialize(mesh, _with_nb_element = true);
/* ------------------------------------------------------------------------ */
/* Creating dumpers */
/* ------------------------------------------------------------------------ */
// Create dumper for the complete mesh and register it as default dumper.
auto && dumper = std::make_shared<DumperParaview>("train", "./paraview/dumpable", false);
mesh.registerExternalDumper(dumper, "train", true);
mesh.addDumpMesh(mesh);
// The dumper for the filtered mesh can be directly taken from the
// ElementGroup and then registered as "wheels_elements" dumper.
auto && wheels = mesh.getGroupDumper("paraview_wheels", "wheels");
mesh.registerExternalDumper(wheels.shared_from_this(), "wheels");
mesh.setDirectoryToDumper("wheels", "./paraview/dumpable");
// Arrays and ElementTypeMapArrays can be added as external fields directly
mesh.addDumpFieldExternal("displacement", displacement);
ElementTypeMapArrayFilter<UInt> filtered_colour(
colour, wheels_elements.getElements());
auto colour_field_wheel =
std::make_shared<dumpers::ElementalField<UInt, Vector, true>>(
filtered_colour);
mesh.addDumpFieldExternal("color", colour_field_wheel);
mesh.addDumpFieldExternalToDumper("wheels", "displacement", displacement);
mesh.addDumpFieldExternalToDumper("wheels", "colour", colour);
// For some specific cases the Fields should be created, as when you want to
// pad an array
auto displacement_vector_field =
mesh.createNodalField(&displacement, "all", 3);
mesh.addDumpFieldExternal("displacement_as_paraview_vector",
displacement_vector_field);
mesh.addDumpFieldExternalToDumper("wheels", "displacement_as_paraview_vector",
displacement_vector_field);
/* ------------------------------------------------------------------------ */
/* ------------------------------------------------------------------------ */
// Fill the ElementTypeMapArray colour.
fillColour(mesh, colour);
/// Apply displacement and wheels rotation.
Real tot_displacement = 50.;
Real radius = 1.;
UInt nb_steps = 100;
Real theta = tot_displacement / radius;
Vector<Real> l_center(spatial_dimension);
Vector<Real> r_center(spatial_dimension);
for (UInt i = 0; i < spatial_dimension; ++i) {
l_center(i) = node(14, i);
r_center(i) = node(2, i);
}
for (UInt i = 0; i < nb_steps; ++i) {
displacement.zero();
Real step_ratio = Real(i) / Real(nb_steps);
Real angle = step_ratio * theta;
applyRotation(l_center, angle, node, displacement, lnode_1);
applyRotation(l_center, angle, node, displacement, lnode_2);
applyRotation(r_center, angle, node, displacement, rnode_1);
applyRotation(r_center, angle, node, displacement, rnode_2);
for (UInt j = 0; j < nb_nodes; ++j) {
displacement(j, _x) += step_ratio * tot_displacement;
}
/// Dump call is finally made through Dumpable interface.
mesh.dump();
mesh.dump("wheels");
}
finalize();
return 0;
}

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