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rAKA/fem/integrator_gauss.cc
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integrator_gauss.cc
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/**
* @file integrator_gauss.cc
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Thu Feb 10 16:52:07 2011
*
* @brief implementation of gauss integrator 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 "mesh.hh"
#include "integrator_gauss.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
IntegratorGauss::IntegratorGauss(Mesh & mesh,
const ID & id,
const MemoryID & memory_id) :
Integrator(mesh, id, memory_id),
quadrature_points("quadrature_points", id) {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type>
void IntegratorGauss::checkJacobians(const GhostType & ghost_type) const {
AKANTU_DEBUG_IN();
UInt nb_quadrature_points = ElementClass<type>::getNbQuadraturePoints();
UInt * elem_val;
UInt nb_element;
elem_val = mesh->getConnectivity(type,ghost_type).values;
nb_element = mesh->getConnectivity(type,ghost_type).getSize();
Real * jacobians_val = jacobians(type, ghost_type).storage();
for (UInt i = 0; i < nb_element*nb_quadrature_points; ++i,++jacobians_val){
AKANTU_DEBUG_ASSERT(*jacobians_val >0,
"Negative jacobian computed,"
<< " possible problem in the element node order");
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type>
void IntegratorGauss::precomputeJacobiansOnQuadraturePoints(const GhostType & ghost_type) {
AKANTU_DEBUG_IN();
UInt spatial_dimension = mesh->getSpatialDimension();
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
UInt nb_quadrature_points = ElementClass<type>::getNbQuadraturePoints();
Real * weights = ElementClass<type>::getGaussIntegrationWeights();
UInt * elem_val = mesh->getConnectivity(type,ghost_type).values;;
UInt nb_element = mesh->getConnectivity(type,ghost_type).getSize();
Vector<Real> & jacobians_tmp = jacobians.alloc(nb_element*nb_quadrature_points,
1,
type,
ghost_type);
Real * jacobians_val = jacobians_tmp.values;
Real local_coord[spatial_dimension * nb_nodes_per_element];
for (UInt elem = 0; elem < nb_element; ++elem) {
mesh->extractNodalCoordinatesFromElement(local_coord,
elem_val+elem*nb_nodes_per_element,
nb_nodes_per_element);
computeJacobianOnQuadPointsByElement<type>(spatial_dimension,
local_coord,
nb_nodes_per_element,
jacobians_val);
for (UInt q = 0; q < nb_quadrature_points; ++q) {
*jacobians_val++ *= weights[q];
}
// jacobians_val += nb_quadrature_points;
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type>
void IntegratorGauss::integrate(const Vector<Real> & in_f,
Vector<Real> &intf,
UInt nb_degre_of_freedom,
const GhostType & ghost_type,
const Vector<UInt> * filter_elements) const {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_ASSERT(jacobians.exists(type, ghost_type),
"No jacobians for the type "
<< jacobians.printType(type, ghost_type));
UInt nb_element = mesh->getNbElement(type,ghost_type);
const Vector<Real> & jac_loc = jacobians(type, ghost_type);
UInt nb_quadrature_points = ElementClass<type>::getNbQuadraturePoints();
UInt * filter_elem_val = NULL;
if(filter_elements != NULL) {
nb_element = filter_elements->getSize();
filter_elem_val = filter_elements->values;
}
Real * in_f_val = in_f.values;
Real * intf_val = intf.values;
Real * jac_val = jac_loc.storage();
UInt offset_in_f = in_f.getNbComponent()*nb_quadrature_points;
UInt offset_intf = intf.getNbComponent();
Real * jac = jac_val;
for (UInt el = 0; el < nb_element; ++el) {
if(filter_elements != NULL) {
jac = jac_val + filter_elem_val[el] * nb_quadrature_points;
}
integrate(in_f_val, jac, intf_val, nb_degre_of_freedom, nb_quadrature_points);
in_f_val += offset_in_f;
intf_val += offset_intf;
if(filter_elements == NULL) {
jac += nb_quadrature_points;
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <ElementType type>
Real IntegratorGauss::integrate(const Vector<Real> & in_f,
const GhostType & ghost_type,
const Vector<UInt> * filter_elements) const {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_ASSERT(jacobians.exists(type, ghost_type),
"No jacobians for the type "
<< jacobians.printType(type, ghost_type));
UInt nb_element = mesh->getNbElement(type, ghost_type);
const Vector<Real> & jac_loc = jacobians(type, ghost_type);
UInt nb_quadrature_points = ElementClass<type>::getNbQuadraturePoints();
UInt * filter_elem_val = NULL;
if(filter_elements != NULL) {
nb_element = filter_elements->getSize();
filter_elem_val = filter_elements->values;
}
Real intf = 0.;
Real * in_f_val = in_f.values;
Real * jac_val = jac_loc.storage();
UInt offset_in_f = in_f.getNbComponent() * nb_quadrature_points;
Real * jac = jac_val;
for (UInt el = 0; el < nb_element; ++el) {
if(filter_elements != NULL) {
jac = jac_val + filter_elem_val[el] * nb_quadrature_points;
}
Real el_intf = 0;
integrate(in_f_val, jac, &el_intf, 1, nb_quadrature_points);
intf += el_intf;
in_f_val += offset_in_f;
if(filter_elements == NULL) {
jac += nb_quadrature_points;
}
}
AKANTU_DEBUG_OUT();
return intf;
}
/* -------------------------------------------------------------------------- */
template <>
void IntegratorGauss::precomputeJacobiansOnQuadraturePoints<_bernoulli_beam_2>(const GhostType & ghost_type) {
AKANTU_DEBUG_IN();
UInt spatial_dimension = mesh->getSpatialDimension();
UInt nb_quadrature_points = ElementClass<_bernoulli_beam_2>::getNbQuadraturePoints();
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(_bernoulli_beam_2);
UInt * elem_val;
UInt nb_element;
elem_val = mesh->getConnectivity(_bernoulli_beam_2, ghost_type).values;
nb_element = mesh->getConnectivity(_bernoulli_beam_2, ghost_type).getSize();
Vector<Real> & jacobians_tmp = jacobians.alloc(nb_element*nb_quadrature_points,
1, _bernoulli_beam_2, ghost_type);
Real local_coord[spatial_dimension * nb_nodes_per_element];
Real * jacobians_val = jacobians_tmp.values;
for (UInt elem = 0; elem < nb_element; ++elem) {
mesh->extractNodalCoordinatesFromElement(local_coord,
elem_val+elem*nb_nodes_per_element,
nb_nodes_per_element);
ElementClass<_bernoulli_beam_2>::computeJacobian(local_coord,
nb_quadrature_points,
spatial_dimension,
jacobians_val);
jacobians_val += nb_quadrature_points;
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
/* template instanciation */
/* -------------------------------------------------------------------------- */
#define INSTANCIATE_TEMPLATE_CLASS(type) \
template void IntegratorGauss:: \
precomputeJacobiansOnQuadraturePoints<type>(const GhostType & ghost_type); \
template void IntegratorGauss:: \
checkJacobians<type>(const GhostType & ghost_type) const; \
template void IntegratorGauss:: \
integrate<type>(const Vector<Real> & in_f, \
Vector<Real> &intf, \
UInt nb_degre_of_freedom, \
const GhostType & ghost_type, \
const Vector<UInt> * filter_elements) const; \
template Real IntegratorGauss:: \
integrate<type>(const Vector<Real> & in_f, \
const GhostType & ghost_type, \
const Vector<UInt> * filter_elements) const;
AKANTU_BOOST_ELEMENT_LIST(INSTANCIATE_TEMPLATE_CLASS)
#undef INSTANCIATE_TEMPLATE_CLASS
__END_AKANTU__
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