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fem.cc
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/**
* @file fem.cc
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Tue Jul 20 23:40:43 2010
*
* @brief Implementation of the FEM class
*
* @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 "fem.hh"
#include "mesh.hh"
#include "element_class.hh"
#include "static_communicator.hh"
#include "aka_math.hh"
#include "dof_synchronizer.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
FEM::FEM(Mesh & mesh, UInt element_dimension, ID id, MemoryID memory_id) :
Memory(memory_id), id(id), normals_on_quad_points("normals_on_quad_points", id) {
AKANTU_DEBUG_IN();
this->element_dimension = (element_dimension != 0) ?
element_dimension : mesh.getSpatialDimension();
init();
this->mesh = &mesh;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void FEM::init() {
}
/* -------------------------------------------------------------------------- */
FEM::~FEM() {
AKANTU_DEBUG_IN();
mesh = NULL;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void FEM::assembleVector(const Vector<Real> & elementary_vect,
Vector<Real> & nodal_values,
const Vector<Int> & equation_number,
UInt nb_degree_of_freedom,
const ElementType & type,
const GhostType & ghost_type,
const Vector<UInt> * filter_elements,
Real scale_factor) const {
AKANTU_DEBUG_IN();
UInt nb_element = mesh->getNbElement(type,ghost_type);
UInt * conn_val = mesh->getConnectivity(type,ghost_type).values;
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
UInt nb_nodes = mesh->getNbNodes();
UInt * filter_elem_val = NULL;
if(filter_elements != NULL) {
nb_element = filter_elements->getSize();
filter_elem_val = filter_elements->values;
}
AKANTU_DEBUG_ASSERT(elementary_vect.getSize() == nb_element,
"The vector elementary_vect(" << elementary_vect.getID()
<< ") has not the good size.");
AKANTU_DEBUG_ASSERT(elementary_vect.getNbComponent()
== nb_degree_of_freedom*nb_nodes_per_element,
"The vector elementary_vect(" << elementary_vect.getID()
<< ") has not the good number of component."
<< "(" << elementary_vect.getNbComponent()
<< " != " << nb_degree_of_freedom*nb_nodes_per_element << ")");
AKANTU_DEBUG_ASSERT(nodal_values.getNbComponent() == nb_degree_of_freedom,
"The vector nodal_values(" << nodal_values.getID()
<< ") has not the good number of component."
<< "(" << nodal_values.getNbComponent()
<< " != " << nb_degree_of_freedom << ")");
nodal_values.resize(nb_nodes);
Real * elementary_vect_val = elementary_vect.values;
Real * nodal_values_val = nodal_values.values;
for (UInt el = 0; el < nb_element; ++el) {
UInt el_offset = el * nb_nodes_per_element;
if(filter_elements != NULL) {
el_offset = filter_elem_val[el] * nb_nodes_per_element;
}
for (UInt n = 0; n < nb_nodes_per_element; ++n) {
UInt node = conn_val[el_offset + n];
UInt offset_node = node * nb_degree_of_freedom;
for (UInt d = 0; d < nb_degree_of_freedom; ++d) {
nodal_values_val[equation_number.values[offset_node + d]]
+= scale_factor * elementary_vect_val[d];
}
elementary_vect_val += nb_degree_of_freedom;
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void FEM::assembleMatrix(const Vector<Real> & elementary_mat,
SparseMatrix & matrix,
UInt nb_degree_of_freedom,
const ElementType & type,
const GhostType & ghost_type,
const Vector<UInt> * filter_elements) const {
AKANTU_DEBUG_IN();
UInt nb_element;
if(ghost_type == _not_ghost) {
nb_element = mesh->getNbElement(type);
} else {
AKANTU_DEBUG_TO_IMPLEMENT();
}
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
UInt * filter_elem_val = NULL;
if(filter_elements != NULL) {
nb_element = filter_elements->getSize();
filter_elem_val = filter_elements->values;
}
AKANTU_DEBUG_ASSERT(elementary_mat.getSize() == nb_element,
"The vector elementary_mat(" << elementary_mat.getID()
<< ") has not the good size.");
AKANTU_DEBUG_ASSERT(elementary_mat.getNbComponent()
== nb_degree_of_freedom * nb_nodes_per_element * nb_degree_of_freedom * nb_nodes_per_element,
"The vector elementary_mat(" << elementary_mat.getID()
<< ") has not the good number of component.");
Real * elementary_mat_val = elementary_mat.values;
UInt offset_elementary_mat = elementary_mat.getNbComponent();
UInt * connectivity_val = mesh->getConnectivity(type, ghost_type).values;
UInt size_mat = nb_nodes_per_element * nb_degree_of_freedom;
UInt size = mesh->getNbGlobalNodes() * nb_degree_of_freedom;
Int * eq_nb_val = matrix.getDOFSynchronizer().getGlobalDOFEquationNumbers().values;
Int * local_eq_nb_val = new Int[nb_degree_of_freedom * nb_nodes_per_element];
for (UInt e = 0; e < nb_element; ++e) {
UInt el = e;
if(filter_elements != NULL) el = filter_elem_val[e];
Int * tmp_local_eq_nb_val = local_eq_nb_val;
UInt * conn_val = connectivity_val + el * nb_nodes_per_element;
for (UInt i = 0; i < nb_nodes_per_element; ++i) {
UInt n = conn_val[i];
for (UInt d = 0; d < nb_degree_of_freedom; ++d) {
*tmp_local_eq_nb_val++ = eq_nb_val[n * nb_degree_of_freedom + d];
}
// memcpy(tmp_local_eq_nb_val, eq_nb_val + n * nb_degree_of_freedom, nb_degree_of_freedom * sizeof(Int));
// tmp_local_eq_nb_val += nb_degree_of_freedom;
}
for (UInt i = 0; i < size_mat; ++i) {
UInt c_irn = local_eq_nb_val[i];
if(c_irn < size) {
UInt j_start = (matrix.getSparseMatrixType() == _symmetric) ? i : 0;
for (UInt j = j_start; j < size_mat; ++j) {
UInt c_jcn = local_eq_nb_val[j];
if(c_jcn < size) {
matrix(c_irn, c_jcn) += elementary_mat_val[i * size_mat + j];
}
}
}
}
elementary_mat_val += offset_elementary_mat;
}
delete [] local_eq_nb_val;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void FEM::printself(std::ostream & stream, int indent) const {
std::string space;
for(Int i = 0; i < indent; i++, space += AKANTU_INDENT);
stream << space << "FEM [" << std::endl;
stream << space << " + id : " << id << std::endl;
stream << space << " + element dimension : " << element_dimension << std::endl;
stream << space << " + mesh [" << std::endl;
mesh->printself(stream, indent + 2);
stream << space << AKANTU_INDENT << "]" << std::endl;
stream << space << " + mesh [" << std::endl;
mesh->printself(stream, indent + 2);
stream << space << AKANTU_INDENT << "]" << std::endl;
stream << space << "]" << std::endl;
}
/* -------------------------------------------------------------------------- */
__END_AKANTU__

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