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rAKA/src/geometry/mesh_sphere_intersector_tmpl.hh
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mesh_sphere_intersector_tmpl.hh
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/**
* @file mesh_sphere_intersector_tmpl.hh
*
* @author Clément Roux-Langlois <clement.roux@epfl.ch>
*
* @date creation: Wed june 10 2015
* @date last modification: Wed June 17 2015
*
* @brief Computation of mesh intersection with spheres
*
* @section LICENSE
*
* Copyright (©) 2010-2015 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_SPHERE_INTERSECTOR_TMPL_HH__
#define __AKANTU_MESH_SPHERE_INTERSECTOR_TMPL_HH__
#include "aka_common.hh"
#include "mesh_geom_common.hh"
#include "tree_type_helper.hh"
#include "mesh_sphere_intersector.hh"
#include "static_communicator.hh"
__BEGIN_AKANTU__
template<UInt dim, ElementType type>
MeshSphereIntersector<dim, type>::MeshSphereIntersector(Mesh & mesh,
const ID & id,
const MemoryID & memory_id):
parent_type(mesh, id, memory_id),
tol_intersection_on_node(1e-10),
nb_nodes_fem(mesh.getNodes().getSize()),
nb_prim_by_el(0)
{
this->intersection_points = new Array<Real>(0,dim);
for(Mesh::type_iterator it = mesh.firstType(dim); it != mesh.lastType(dim); ++it){
#if defined(AKANTU_IGFEM)
if(*it == _triangle_3){
// Addition of the igfem types in the mesh
this->mesh.addConnectivityType(_igfem_triangle_4, _not_ghost);
this->mesh.addConnectivityType(_igfem_triangle_4, _ghost);
this->mesh.addConnectivityType(_igfem_triangle_5, _not_ghost);
this->mesh.addConnectivityType(_igfem_triangle_5, _ghost);
}
else if( (*it != _triangle_3) && (*it != _igfem_triangle_4) && (*it != _igfem_triangle_5) ) {
AKANTU_DEBUG_ERROR("Not ready for mesh type " << *it);
}
if( (type == _triangle_3) || (type == _igfem_triangle_4) || (type == _igfem_triangle_5) ){
this->nb_prim_by_el = 3;
const_cast<UInt &>(this->nb_seg_by_el) = 3;
} else {
AKANTU_DEBUG_ERROR("Not ready for mesh type " << type);
}
#else
if( (*it != _triangle_3) )
AKANTU_DEBUG_ERROR("Not ready for mesh type " << *it);
this->nb_prim_by_el = 3;
#endif
}
for (ghost_type_t::iterator gt = ghost_type_t::begin(); gt != ghost_type_t::end(); ++gt) {
GhostType ghost_type = *gt;
UInt nb_comp = 1 + nb_prim_by_el * 2;
this->new_node_per_elem.alloc(0, nb_comp, type, ghost_type, 0);
}
}
template<UInt dim, ElementType type>
MeshSphereIntersector<dim, type>::~MeshSphereIntersector()
{}
template<UInt dim, ElementType type>
void MeshSphereIntersector<dim, type>::constructData() {
for (ghost_type_t::iterator gt = ghost_type_t::begin(); gt != ghost_type_t::end(); ++gt) {
GhostType ghost_type = *gt;
this->new_node_per_elem(type, ghost_type).resize(this->mesh.getNbElement(type, ghost_type));
this->new_node_per_elem(type, ghost_type).clear();
}
MeshGeomIntersector<dim, type, Line_arc<SK>, SK::Sphere_3, SK>::constructData();
}
template<UInt dim, ElementType type>
void MeshSphereIntersector<dim, type>:: computeMeshQueryIntersectionPoint(const SK::Sphere_3 & query) {
/// function to replace computeIntersectionQuery in a more generic geometry module version
// The newNodeEvent is not send from this method who only compute the intersection points
AKANTU_DEBUG_IN();
Array<Real> & nodes = this->mesh.getNodes();
UInt nb_node = nodes.getSize() + this->intersection_points->getSize();
UInt nb_not_ghost_elements = this->mesh.getNbElement(type);
// Tolerance for proximity checks should be defined by user
Math::setTolerance(tol_intersection_on_node);
typedef boost::variant<pair_type> sk_inter_res;
TreeTypeHelper<Line_arc<Spherical>, Spherical>::const_iterator
it = this->factory.getPrimitiveList().begin(),
end= this->factory.getPrimitiveList().end();
for (; it != end ; ++it) {
std::list<sk_inter_res> s_results;
CGAL::intersection(*it, query, std::back_inserter(s_results));
if (s_results.size() == 1) { // just one point
if (pair_type * pair = boost::get<pair_type>(&s_results.front())) {
if (pair->second == 1) { // not a point tangent to the sphere
// Addition of the new node
Vector<Real> new_node(dim, 0.0);
Cartesian::Point_3 point(CGAL::to_double(pair->first.x()),
CGAL::to_double(pair->first.y()),
CGAL::to_double(pair->first.z()));
for (UInt i = 0 ; i < dim ; i++) {
new_node(i) = point[i];
}
bool is_on_mesh = false, is_new = true;
// check if we already compute this intersection for a neighboor element
UInt n = nb_nodes_fem;
Array<Real>::vector_iterator existing_node = nodes.begin(dim);
for (; n < nodes.getSize() ; ++n) {
if (Math::are_vector_equal(dim, new_node.storage(), existing_node[n].storage())) {
is_new = false;
break;
}
}
if(is_new){
Array<Real>::vector_iterator intersection_points_it = this->intersection_points->begin(dim);
Array<Real>::vector_iterator intersection_points_end = this->intersection_points->end(dim);
for (; intersection_points_it != intersection_points_end ; ++intersection_points_it, ++n) {
if (Math::are_vector_equal(dim, new_node.storage(), intersection_points_it->storage())) {
is_new = false;
break;
}
}
}
Cartesian::Point_3 source_cgal(CGAL::to_double(it->source().x()),
CGAL::to_double(it->source().y()),
CGAL::to_double(it->source().z()));
Cartesian::Point_3 target_cgal(CGAL::to_double(it->target().x()),
CGAL::to_double(it->target().y()),
CGAL::to_double(it->target().z()));
Vector<Real> source(dim), target(dim);
for (UInt i = 0 ; i < dim ; i++) {
source(i) = source_cgal[i];
target(i) = target_cgal[i];
}
// Check if we are close from a node of the segment
if (Math::are_vector_equal(dim, source.storage(), new_node.storage()) ||
Math::are_vector_equal(dim, target.storage(), new_node.storage())) {
is_on_mesh = true;
is_new = false;
}
if (is_new) {
this->intersection_points->push_back(new_node);
nb_node++;
}
// deduce ghost type and element id
UInt element_id = it->id();
GhostType ghost_type = _not_ghost;
if (element_id >= nb_not_ghost_elements) {
element_id -= nb_not_ghost_elements;
ghost_type = _ghost;
}
Array<UInt> & new_node_per_elem_array = this->new_node_per_elem(type, ghost_type);
if (!is_on_mesh) {
new_node_per_elem_array(element_id, 0) += 1;
new_node_per_elem_array(element_id, (2 * new_node_per_elem_array(element_id, 0)) - 1) = n;
new_node_per_elem_array(element_id, 2 * new_node_per_elem_array(element_id, 0)) = it->segId();
} else {
// if intersection is at a node, write node number (in el) in pennultimate position
if (Math::are_vector_equal(dim, source.storage(), new_node.storage())) {
new_node_per_elem_array(element_id, (new_node_per_elem_array.getNbComponent() - 2)) = it->segId();
} else {
new_node_per_elem_array(element_id, (new_node_per_elem_array.getNbComponent() - 2)) =
(it->segId()+1) % this->nb_prim_by_el;
}
}
}
}
}
}
AKANTU_DEBUG_OUT();
}
__END_AKANTU__
#endif // __AKANTU_MESH_SPHERE_INTERSECTOR_TMPL_HH__
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