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non_local_neighborhood_tmpl.hh
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/**
* @file non_local_neighborhood_tmpl.hh
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Mon Sep 28 2015
* @date last modification: Wed Nov 25 2015
*
* @brief Implementation of class non-local neighborhood
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "non_local_manager.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_NON_LOCAL_NEIGHBORHOOD_TMPL_HH__
#define __AKANTU_NON_LOCAL_NEIGHBORHOOD_TMPL_HH__
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
template<class WeightFunction>
NonLocalNeighborhood<WeightFunction>::NonLocalNeighborhood(NonLocalManager & manager,
const ElementTypeMapReal & quad_coordinates,
const ID & id,
const MemoryID & memory_id) :
NonLocalNeighborhoodBase(manager.getModel(), quad_coordinates, id, memory_id),
non_local_manager(&manager) {
AKANTU_DEBUG_IN();
for(UInt gt = _not_ghost; gt <= _ghost; ++gt) {
GhostType ghost_type = (GhostType) gt;
pair_weight[ghost_type] = NULL;
}
this->weight_function = new WeightFunction(this->getNonLocalManager());
this->registerSubSection(_st_weight_function, "weight_parameter", *weight_function);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template<class WeightFunction>
NonLocalNeighborhood<WeightFunction>::~NonLocalNeighborhood() {
AKANTU_DEBUG_IN();
for(UInt gt = _not_ghost; gt <= _ghost; ++gt) {
GhostType ghost_type = (GhostType) gt;
delete pair_weight[ghost_type];
}
delete weight_function;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template<class WeightFunction>
void NonLocalNeighborhood<WeightFunction>::computeWeights() {
AKANTU_DEBUG_IN();
this->weight_function->setRadius(this->neighborhood_radius);
Vector<Real> q1_coord(this->spatial_dimension);
Vector<Real> q2_coord(this->spatial_dimension);
UInt nb_weights_per_pair = 2; /// w1: q1->q2, w2: q2->q1
/// get the elementtypemap for the neighborhood volume for each quadrature point
ElementTypeMapReal & quadrature_points_volumes = this->non_local_manager->getVolumes();
/// update the internals of the weight function if applicable (not
/// all the weight functions have internals and do noting in that
/// case)
weight_function->updateInternals();
for(UInt gt = _not_ghost; gt <= _ghost; ++gt) {
GhostType ghost_type = (GhostType) gt;
/// allocate the array to store the weight, if it doesn't exist already
if(!(pair_weight[ghost_type])) {
std::string ghost_id = "";
if (ghost_type == _ghost) ghost_id = ":ghost";
std::stringstream sstr; sstr << this->id <<":pair_weight:" << ghost_id;
pair_weight[ghost_type] = new Array<Real>(0, nb_weights_per_pair, sstr.str());
}
/// resize the array to the correct size
pair_weight[ghost_type]->resize(pair_list[ghost_type].size());
/// set entries to zero
pair_weight[ghost_type]->clear();
/// loop over all pairs in the current pair list array and their corresponding weights
PairList::const_iterator first_pair = pair_list[ghost_type].begin();
PairList::const_iterator last_pair = pair_list[ghost_type].end();
Array<Real>::vector_iterator weight_it = pair_weight[ghost_type]->begin(nb_weights_per_pair);
// Compute the weights
for(;first_pair != last_pair; ++first_pair, ++weight_it) {
Vector<Real> & weight = *weight_it;
const IntegrationPoint & q1 = first_pair->first;
const IntegrationPoint & q2 = first_pair->second;
/// get the coordinates for the given pair of quads
Array<Real>::const_vector_iterator coords_type_1_it = this->quad_coordinates(q1.type, q1.ghost_type).begin(this->spatial_dimension);
q1_coord = coords_type_1_it[q1.global_num];
Array<Real>::const_vector_iterator coords_type_2_it = this->quad_coordinates(q2.type, q2.ghost_type).begin(this->spatial_dimension);
q2_coord = coords_type_2_it[q2.global_num];
Array<Real> & quad_volumes_1 = quadrature_points_volumes(q1.type, q1.ghost_type);
const Array<Real> & jacobians_2 =
this->non_local_manager->getJacobians(q2.type, q2.ghost_type);
const Real & q2_wJ = jacobians_2(q2.global_num);
/// compute distance between the two quadrature points
Real r = q1_coord.distance(q2_coord);
/// compute the weight for averaging on q1 based on the distance
Real w1 = this->weight_function->operator()(r, q1, q2);
weight(0) = q2_wJ * w1;
quad_volumes_1(q1.global_num) += weight(0);
if(q2.ghost_type != _ghost && q1.global_num != q2.global_num) {
const Array<Real> & jacobians_1 =
this->non_local_manager->getJacobians(q1.type, q1.ghost_type);
Array<Real> & quad_volumes_2 =
quadrature_points_volumes(q2.type, q2.ghost_type);
/// compute the weight for averaging on q2
const Real & q1_wJ = jacobians_1(q1.global_num);
Real w2 = this->weight_function->operator()(r, q2, q1);
weight(1) = q1_wJ * w2;
quad_volumes_2(q2.global_num) += weight(1);
} else
weight(1) = 0.;
}
}
/// normalize the weights
for(UInt gt = _not_ghost; gt <= _ghost; ++gt) {
GhostType ghost_type2 = (GhostType) gt;
PairList::const_iterator first_pair = pair_list[ghost_type2].begin();
PairList::const_iterator last_pair = pair_list[ghost_type2].end();
Array<Real>::vector_iterator weight_it = pair_weight[ghost_type2]->begin(nb_weights_per_pair);
// Compute the weights
for(;first_pair != last_pair; ++first_pair, ++weight_it) {
Vector<Real> & weight = *weight_it;
const IntegrationPoint & q1 = first_pair->first;
const IntegrationPoint & q2 = first_pair->second;
Array<Real> & quad_volumes_1 = quadrature_points_volumes(q1.type, q1.ghost_type);
Array<Real> & quad_volumes_2 = quadrature_points_volumes(q2.type, q2.ghost_type);
Real q1_volume = quad_volumes_1(q1.global_num);
weight(0) *= 1. / q1_volume;
if(ghost_type2 != _ghost) {
Real q2_volume = quad_volumes_2(q2.global_num);
weight(1) *= 1. / q2_volume;
}
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template<class WeightFunction>
void NonLocalNeighborhood<WeightFunction>::saveWeights(const std::string & filename) const {
std::ofstream pout;
std::stringstream sstr;
StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator();
Int prank = comm.whoAmI();
sstr << filename << "." << prank;
pout.open(sstr.str().c_str());
for (UInt gt = _not_ghost; gt <= _ghost; ++gt) {
GhostType ghost_type = (GhostType) gt;
AKANTU_DEBUG_ASSERT((pair_weight[ghost_type]), "the weights have not been computed yet");
Array<Real> & weights = *(pair_weight[ghost_type]);
Array<Real>::const_vector_iterator weights_it = weights.begin(2);
for (UInt i = 0; i < weights.getSize(); ++i, ++weights_it)
pout << "w1: " << (*weights_it)(0) <<" w2: " << (*weights_it)(1) << std::endl;
}
}
/* -------------------------------------------------------------------------- */
template<class WeightFunction>
void NonLocalNeighborhood<WeightFunction>::weightedAverageOnNeighbours(const ElementTypeMapReal & to_accumulate,
ElementTypeMapReal & accumulated,
UInt nb_degree_of_freedom,
const GhostType & ghost_type2) const {
AKANTU_DEBUG_IN();
std::set<ID>::iterator it = non_local_variables.find(accumulated.getName());
///do averaging only for variables registered in the neighborhood
if (it != non_local_variables.end()) {
PairList::const_iterator first_pair = pair_list[ghost_type2].begin();
PairList::const_iterator last_pair = pair_list[ghost_type2].end();
Array<Real>::vector_iterator weight_it = pair_weight[ghost_type2]->begin(2);
// Compute the weights
for(;first_pair != last_pair; ++first_pair, ++weight_it) {
Vector<Real> & weight = *weight_it;
const IntegrationPoint & q1 = first_pair->first;
const IntegrationPoint & q2 = first_pair->second;
const Array<Real> & to_acc_1 = to_accumulate(q1.type, q1.ghost_type);
Array<Real> & acc_1 = accumulated(q1.type, q1.ghost_type);
const Array<Real> & to_acc_2 = to_accumulate(q2.type, q2.ghost_type);
Array<Real> & acc_2 = accumulated(q2.type, q2.ghost_type);
for(UInt d = 0; d < nb_degree_of_freedom; ++d) {
acc_1(q1.global_num, d) += weight(0) * to_acc_2(q2.global_num, d);
}
if(ghost_type2 != _ghost) {
for(UInt d = 0; d < nb_degree_of_freedom; ++d) {
acc_2(q2.global_num, d) += weight(1) * to_acc_1(q1.global_num, d);
}
}
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template<class WeightFunction>
void NonLocalNeighborhood<WeightFunction>::updateWeights() {
// Update the weights for the non local variable averaging
if(this->weight_function->getUpdateRate() &&
(this->non_local_manager->getNbStressCalls() % this->weight_function->getUpdateRate() == 0)) {
this->synch_registry->asynchronousSynchronize(_gst_mnl_weight);
this->synch_registry->waitEndSynchronize(_gst_mnl_weight);
this->computeWeights();
}
}
/* -------------------------------------------------------------------------- */
template<class WeightFunction>
void NonLocalNeighborhood<WeightFunction>::registerNonLocalVariable(const ID & id) {
this->non_local_variables.insert(id);
}
__END_AKANTU__
#endif /* __AKANTU_NON_LOCAL_NEIGHBORHOOD_TMPL__ */

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