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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 Frerot <lucas.frerot@epfl.ch>
* @author Clement Roux <clement.roux@epfl.ch>
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date creation: Fri Feb 27 2015
* @date last modification: Tue Sep 08 2020
*
* @brief Class for constructing the CGAL primitives of a mesh
*
*
* @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 "mesh_geom_common.hh"
#include "mesh_geom_factory.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_MESH_GEOM_FACTORY_TMPL_HH_
#define AKANTU_MESH_GEOM_FACTORY_TMPL_HH_
namespace akantu {
/* -------------------------------------------------------------------------- */
template <UInt dim, ElementType type, class Primitive, class Kernel>
MeshGeomFactory<dim, type, Primitive, Kernel>::MeshGeomFactory(Mesh & mesh)
: MeshGeomAbstract(mesh) {}
/* -------------------------------------------------------------------------- */
template <UInt dim, ElementType type, class Primitive, class Kernel>
MeshGeomFactory<dim, type, Primitive, Kernel>::~MeshGeomFactory() {
delete data_tree;
}
/* -------------------------------------------------------------------------- */
/**
* This function loops over the elements of `type` in the mesh and creates the
* AABB tree of geometrical primitves (`data_tree`).
*/
template <UInt dim, ElementType type, class Primitive, class Kernel>
void MeshGeomFactory<dim, type, Primitive, Kernel>::constructData(
GhostType ghost_type) {
AKANTU_DEBUG_IN();
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();
UInt el_index = 0;
auto it = connectivity.begin(nb_nodes_per_element);
auto end = connectivity.end(nb_nodes_per_element);
Matrix<Real> node_coordinates(dim, nb_nodes_per_element);
// This loop builds the list of primitives
for (; it != end; ++it, ++el_index) {
const Vector<UInt> & el_connectivity = *it;
for (UInt i = 0; i < nb_nodes_per_element; i++) {
for (UInt j = 0; j < dim; j++) {
node_coordinates(j, i) = nodes(el_connectivity(i), j);
}
}
// the unique elemental id assigned to the primitive is the
// linearized element index over ghost type
addPrimitive(node_coordinates, el_index);
}
delete data_tree;
// This condition allows the use of the mesh geom module
// even if types are not compatible with AABB tree algorithm
if (TreeTypeHelper_::is_valid) {
data_tree = new TreeType(primitive_list.begin(), primitive_list.end());
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
namespace {
namespace details {
enum class GeometricalType {
_triangle,
_tetrahedron,
};
template <ElementType element_type> struct GeometricalTypeHelper {};
template <> struct GeometricalTypeHelper<_triangle_3> {
static const GeometricalType type{GeometricalType::_triangle};
};
template <> struct GeometricalTypeHelper<_triangle_6> {
static const GeometricalType type{GeometricalType::_triangle};
};
template <> struct GeometricalTypeHelper<_tetrahedron_4> {
static const GeometricalType type{GeometricalType::_triangle};
};
#if defined(AKANTU_IGFEM)
template <> struct GeometricalTypeHelper<_igfem_triangle_4> {
static const GeometricalType type{GeometricalType::_triangle};
};
template <> struct GeometricalTypeHelper<_igfem_triangle_5> {
static const GeometricalType type{GeometricalType::_triangle};
};
#endif
template <details::GeometricalType geom_type, class Primitive, class Kernel>
struct AddPrimitiveHelper {};
template <class Primitive>
struct AddPrimitiveHelper<GeometricalType::_triangle, Primitive,
cgal::Cartesian> {
using TreeTypeHelper_ = TreeTypeHelper<Primitive, cgal::Cartesian>;
using ContainerType = typename TreeTypeHelper_::container_type;
static void addPrimitive(const Matrix<Real> & node_coordinates, UInt id,
ContainerType & list) {
using Point = typename TreeTypeHelper_::point_type;
Point a(node_coordinates(0, 0), node_coordinates(1, 0), 0.);
Point b(node_coordinates(0, 1), node_coordinates(1, 1), 0.);
Point c(node_coordinates(0, 2), node_coordinates(1, 2), 0.);
Triangle<cgal::Cartesian> t(a, b, c);
t.setId(id);
list.push_back(t);
}
};
template <class Primitive>
struct AddPrimitiveHelper<GeometricalType::_triangle, Primitive,
cgal::Spherical> {
using TreeTypeHelper_ = TreeTypeHelper<Primitive, cgal::Spherical>;
using ContainerType = typename TreeTypeHelper_::container_type;
static void addPrimitive(const Matrix<Real> & node_coordinates, UInt id,
ContainerType & list) {
using Point = typename TreeTypeHelper_::point_type;
Point a(node_coordinates(0, 0), node_coordinates(1, 0), 0.);
Point b(node_coordinates(0, 1), node_coordinates(1, 1), 0.);
Point c(node_coordinates(0, 2), node_coordinates(1, 2), 0.);
using Line = CGAL::Line_3<cgal::Spherical>;
Line l1(a, b);
Line l2(b, c);
Line l3(c, a);
using Arc = Line_arc<cgal::Spherical>;
Arc s1(l1, a, b);
Arc s2(l2, b, c);
Arc s3(l3, c, a);
s1.setId(id);
s1.setSegId(0);
s2.setId(id);
s2.setSegId(1);
s3.setId(id);
s3.setSegId(2);
list.push_back(s1);
list.push_back(s2);
list.push_back(s3);
}
};
template <class Primitive>
struct AddPrimitiveHelper<GeometricalType::_tetrahedron, Primitive,
cgal::Cartesian> {
using TreeTypeHelper_ = TreeTypeHelper<Primitive, cgal::Cartesian>;
using ContainerType = typename TreeTypeHelper_::container_type;
static void addPrimitive(const Matrix<Real> & node_coordinates, UInt id,
ContainerType & list) {
using Point = typename TreeTypeHelper_::point_type;
Point a(node_coordinates(0, 0), node_coordinates(1, 0),
node_coordinates(2, 0));
Point b(node_coordinates(0, 1), node_coordinates(1, 1),
node_coordinates(2, 1));
Point c(node_coordinates(0, 2), node_coordinates(1, 2),
node_coordinates(2, 2));
Point d(node_coordinates(0, 3), node_coordinates(1, 3),
node_coordinates(2, 3));
Triangle<cgal::Cartesian> t1(a, b, c);
Triangle<cgal::Cartesian> t2(b, c, d);
Triangle<cgal::Cartesian> t3(c, d, a);
Triangle<cgal::Cartesian> t4(d, a, b);
t1.setId(id);
t2.setId(id);
t3.setId(id);
t4.setId(id);
list.push_back(t1);
list.push_back(t2);
list.push_back(t3);
list.push_back(t4);
}
};
} // namespace details
} // namespace
/* -------------------------------------------------------------------------- */
template <UInt dim, ElementType type, class Primitive, class Kernel>
void MeshGeomFactory<dim, type, Primitive, Kernel>::addPrimitive(
const Matrix<Real> & node_coordinates, UInt id, ContainerType & list) {
details::AddPrimitiveHelper<details::GeometricalTypeHelper<type>::type,
Primitive, Kernel>::addPrimitive(node_coordinates,
id, list);
}
/* -------------------------------------------------------------------------- */
template <UInt dim, ElementType type, class Primitive, class Kernel>
void MeshGeomFactory<dim, type, Primitive, Kernel>::addPrimitive(
const Matrix<Real> & node_coordinates, UInt id) {
this->addPrimitive(node_coordinates, id, this->primitive_list);
}
} // namespace akantu
#endif // AKANTU_MESH_GEOM_FACTORY_TMPL_HH_

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