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mesh_geom_factory_tmpl.hh
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mesh_geom_factory_tmpl.hh
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/**
* @file mesh_geom_factory_tmpl.hh
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @date creation: Thu Feb 26 2015
* @date last modification: Thu Mar 5 2015
*
* @brief Class for constructing the CGAL primitives of a mesh
*
* @section LICENSE
*
* Copyright (©) 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef _AKANTU_MESH_GEOM_FACTORY_TMPL_HH__
#define _AKANTU_MESH_GEOM_FACTORY_TMPL_HH__
#include "mesh_geom_factory.hh"
#include "aka_common.hh"
#include "tree_type_helper.hh"
#include "triangle.hh"
#include "geom_helper_functions.hh"
#include <CGAL/Cartesian.h>
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
typedef CGAL::Cartesian<Real> K;
template<UInt d, ElementType type>
MeshGeomFactory<d, type>::MeshGeomFactory(const Mesh & mesh) :
MeshGeomAbstract(mesh),
data_tree(NULL),
primitive_list(),
nodes(NULL),
associated_id(NULL),
associated_type(NULL)
{}
template<UInt d, ElementType type>
MeshGeomFactory<d, type>::~MeshGeomFactory() {
delete data_tree;
delete nodes;
delete associated_id;
delete associated_type;
}
// Need to implement this method for every case needed
template<>
void MeshGeomFactory<2, _triangle_3>::constructData() {
/// Variable declaration instead of template arguments
const UInt d = 2;
const ElementType type = _triangle_3;
const GhostType ghost_type = _not_ghost;
primitive_list.clear();
UInt nb_nodes_per_element = mesh.getNbNodesPerElement(type);
const Array<UInt> & connectivity = mesh.getConnectivity(type, ghost_type);
const Array<Real> & nodes = mesh.getNodes();
Array<UInt>::const_vector_iterator begin = connectivity.begin(nb_nodes_per_element);
Array<UInt>::const_vector_iterator it = connectivity.begin(nb_nodes_per_element);
Array<UInt>::const_vector_iterator end = connectivity.end(nb_nodes_per_element);
/// This loop builds the list of triangle primitives
for (; it != end ; ++it) {
const Vector<UInt> & el_connectivity = *it;
Matrix<Real> node_coordinates(d, nb_nodes_per_element);
for (UInt i = 0 ; i < nb_nodes_per_element ; i++)
for (UInt j = 0 ; j < d ; j++)
node_coordinates(j, i) = nodes(el_connectivity(i), j);
/// There's a problem here with constructors :
/// - 2D constructors take 2 arguments
/// - 3D constructors take 3 arguments
/// Need for a solution that can treat the two cases together
TreeTypeHelper<d, type>::point_type a(node_coordinates(0, 0), node_coordinates(1, 0), 0.);
TreeTypeHelper<d, type>::point_type b(node_coordinates(0, 1), node_coordinates(1, 1), 0.);
TreeTypeHelper<d, type>::point_type c(node_coordinates(0, 2), node_coordinates(1, 2), 0.);
/// Number of arguments here should not be a problem with polygon/polyhedra
/// Also it is possible to create tree or lists from polyhedric surfaces
Triangle<K> t(a, b, c);
t.setId(it - begin);
primitive_list.push_back(t);
}
/// Construct the tree
if (data_tree) {
delete data_tree;
data_tree = NULL;
}
data_tree = new TreeTypeHelper<d, type>::tree(primitive_list.begin(), primitive_list.end());
}
template<UInt d, ElementType el_type>
UInt MeshGeomFactory<d, el_type>::numberOfIntersectionsWithInterface(const K::Segment_3 & interface) const {
return data_tree->number_of_intersected_primitives(interface);
}
template<UInt d, ElementType el_type>
Mesh * MeshGeomFactory<d, el_type>::computeIntersectionWithLinearInterface(const K::Segment_3 & interface) {
UInt number_of_intersections = this->numberOfIntersectionsWithInterface(interface);
if (!number_of_intersections)
return NULL;
std::list<typename TreeTypeHelper<d, el_type>::linear_intersection> list_of_intersections;
std::list< std::pair<K::Segment_3, UInt> > list_of_segments; // Contains no duplicate elements
data_tree->all_intersections(interface, std::back_inserter(list_of_intersections));
this->constructSegments(list_of_intersections, list_of_segments);
if (nodes) {
delete nodes;
nodes = NULL;
}
nodes = new Array<Real>(2 * list_of_segments.size(), d);
Array<UInt> connectivity(list_of_segments.size(), 2);
std::list< std::pair<K::Segment_3, UInt> >::iterator it = list_of_segments.begin();
std::list< std::pair<K::Segment_3, UInt> >::iterator end = list_of_segments.end();
Array<Real>::vector_iterator nodes_it = nodes->begin(d);
Array<UInt>::vector_iterator connectivity_it = connectivity.begin(2);
for (; it != end ; ++it, nodes_it += 2, ++connectivity_it) {
UInt node_id = nodes_it - nodes->begin(d);
(*connectivity_it)(0) = node_id;
(*connectivity_it)(1) = node_id + 1;
for (UInt j = 0 ; j < d ; j++) {
(*nodes_it)(j) = it->first.source()[j];
(*(nodes_it + 1))(j) = it->first.target()[j];
}
}
Mesh * mesh = new Mesh(d, *nodes, "interface_mesh");
mesh->addConnectivityType(_segment_2);
mesh->getConnectivity(_segment_2).copy(connectivity);
if (associated_id) {
delete associated_id;
associated_id = NULL;
}
if (associated_type) {
delete associated_type;
associated_type = NULL;
}
associated_id = new Array<UInt>(mesh->getNbElement(_segment_2), 1, (UInt) 0);
associated_type = new Array<Element>(mesh->getNbElement(_segment_2));
Array<UInt>::scalar_iterator associated_id_it = associated_id->begin();
Array<Element>::scalar_iterator associated_type_it = associated_type->begin();
it = list_of_segments.begin();
for (; it != end ; ++it, ++associated_id_it, ++associated_type_it) {
*associated_id_it = it->second;
associated_type_it->type = el_type;
}
mesh->registerData<UInt>("associated_id").setArray(_segment_2, _not_ghost, *associated_id);
mesh->registerData<Element>("associated_type").setArray(_segment_2, _not_ghost, *associated_type);
return mesh;
}
template<UInt d, ElementType el_type>
void MeshGeomFactory<d, el_type>::constructSegments(const std::list< typename TreeTypeHelper<d, el_type>::linear_intersection > & intersections,
std::list< std::pair<K::Segment_3, UInt> > & segments) {
typename std::list<typename TreeTypeHelper<d, el_type>::linear_intersection>::const_iterator int_it = intersections.begin(),
int_end = intersections.end();
for (; int_it != int_end ; ++int_it) {
if (const K::Segment_3 * segment = boost::get<K::Segment_3>(&((*int_it)->first))) {
std::pair<K::Segment_3, UInt> segment_id(*segment, (*int_it)->second);
segments.push_back(segment_id);
}
}
segments.unique(CompareSegmentPairs());
}
__END_AKANTU__
#endif // _AKANTU_MESH_GEOM_FACTORY_TMPL_HH__

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