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dof_manager.cc
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			/**
			* @file dof_manager.cc
			*
			* @author Nicolas Richart <nicolas.richart@epfl.ch>
			*
			* @date Wed Aug 12 09:52:30 2015
			*
			* @brief Implementation of the common parts of the DOFManagers
			*
			* @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 "dof_manager.hh"
			#include "element_group.hh"
			#include "mesh.hh"
			#include "mesh_utils.hh"
			#include "node_group.hh"
			#include "sparse_matrix.hh"
			#include "static_communicator.hh"
			#include "non_linear_solver.hh"
			#include "time_step_solver.hh"
			/* -------------------------------------------------------------------------- */

			namespace akantu {

			/* -------------------------------------------------------------------------- */
			DOFManager::DOFManager(const ID & id, const MemoryID & memory_id)
			: Memory(id, memory_id), mesh(nullptr), local_system_size(0),
			pure_local_system_size(0), system_size(0),
			communicator(StaticCommunicator::getStaticCommunicator()) {}

			/* -------------------------------------------------------------------------- */
			DOFManager::DOFManager(Mesh & mesh, const ID & id, const MemoryID & memory_id)
			: Memory(id, memory_id), mesh(&mesh), local_system_size(0),
			pure_local_system_size(0), system_size(0),
			communicator(mesh.getCommunicator()) {
			this->mesh->registerEventHandler(*this, 20);

			UInt nb_nodes = this->mesh->getNbNodes();
			this->nodes_to_elements.resize(nb_nodes);
			for (UInt n = 0; n < nb_nodes; ++n) {
			this->nodes_to_elements[n] = new std::set<Element>();
			}
			}

			/* -------------------------------------------------------------------------- */
			DOFManager::~DOFManager() {
			NodesToElements::scalar_iterator nte_it = this->nodes_to_elements.begin();
			NodesToElements::scalar_iterator nte_end = this->nodes_to_elements.end();
			for (; nte_it != nte_end; ++nte_it)
			delete *nte_it;

			DOFStorage::iterator ds_it = dofs.begin();
			DOFStorage::iterator ds_end = dofs.end();
			for (; ds_it != ds_end; ++ds_it)
			delete ds_it->second;

			SparseMatricesMap::iterator sm_it = matrices.begin();
			SparseMatricesMap::iterator sm_end = matrices.end();
			for (; sm_it != sm_end; ++sm_it)
			delete sm_it->second;

			NonLinearSolversMap::iterator nls_it = non_linear_solvers.begin();
			NonLinearSolversMap::iterator nls_end = non_linear_solvers.end();
			for (; nls_it != nls_end; ++nls_it)
			delete nls_it->second;

			TimeStepSolversMap::iterator tss_it = time_step_solvers.begin();
			TimeStepSolversMap::iterator tss_end = time_step_solvers.end();
			for (; tss_it != tss_end; ++tss_it)
			delete tss_it->second;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::getEquationsNumbers(const ID &, Array<UInt> &) {
			AKANTU_DEBUG_TO_IMPLEMENT();
			}

			/* -------------------------------------------------------------------------- */
			std::vector<ID> DOFManager::getDOFIDs() const {
			std::vector<ID> keys;
			for (const auto & dof_data : this->dofs)
			keys.push_back(dof_data.first);

			return keys;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::assembleElementalArrayLocalArray(
			const Array<Real> & elementary_vect, Array<Real> & array_assembeled,
			const ElementType & type, const GhostType & ghost_type, Real scale_factor,
			const Array<UInt> & filter_elements) {
			AKANTU_DEBUG_IN();

			UInt nb_element;
			UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
			UInt nb_degree_of_freedom =
			elementary_vect.getNbComponent() / nb_nodes_per_element;

			UInt * filter_it = NULL;
			if (filter_elements != empty_filter) {
			nb_element = filter_elements.getSize();
			filter_it = filter_elements.storage();
			} else {
			nb_element = this->mesh->getNbElement(type, ghost_type);
			}

			AKANTU_DEBUG_ASSERT(elementary_vect.getSize() == nb_element,
			"The vector elementary_vect("
			<< elementary_vect.getID()
			<< ") has not the good size.");

			const Array<UInt> & connectivity =
			this->mesh->getConnectivity(type, ghost_type);
			// Array<UInt>::const_vector_iterator conn_begin =
			// connectivity.begin(nb_nodes_per_element);
			// Array<UInt>::const_vector_iterator conn_it = conn_begin;

			Array<Real>::const_matrix_iterator elem_it =
			elementary_vect.begin(nb_degree_of_freedom, nb_nodes_per_element);

			for (UInt el = 0; el < nb_element; ++el, ++elem_it) {
			UInt element = el;
			if (filter_it != NULL) {
			// conn_it = conn_begin + *filter_it;
			element = *filter_it;
			}

			// const Vector<UInt> & conn = *conn_it;
			const Matrix<Real> & elemental_val = *elem_it;
			for (UInt n = 0; n < nb_nodes_per_element; ++n) {
			UInt offset_node = connectivity(element, n) * nb_degree_of_freedom;
			Vector<Real> assemble(array_assembeled.storage() + offset_node,
			nb_degree_of_freedom);
			Vector<Real> elem_val = elemental_val(n);
			assemble.aXplusY(elem_val, scale_factor);
			}

			if (filter_it != NULL)
			++filter_it;
			// else
			// ++conn_it;
			}

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::assembleElementalArrayToResidual(
			const ID & dof_id, const Array<Real> & elementary_vect,
			const ElementType & type, const GhostType & ghost_type, Real scale_factor,
			const Array<UInt> & filter_elements) {
			AKANTU_DEBUG_IN();

			UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
			UInt nb_degree_of_freedom =
			elementary_vect.getNbComponent() / nb_nodes_per_element;
			Array<Real> array_localy_assembeled(this->mesh->getNbNodes(),
			nb_degree_of_freedom);

			array_localy_assembeled.clear();

			this->assembleElementalArrayLocalArray(
			elementary_vect, array_localy_assembeled, type, ghost_type, scale_factor,
			filter_elements);

			this->assembleToResidual(dof_id, array_localy_assembeled, 1);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::assembleElementalArrayToLumpedMatrix(
			const ID & dof_id, const Array<Real> & elementary_vect,
			const ID & lumped_mtx, const ElementType & type,
			const GhostType & ghost_type, Real scale_factor,
			const Array<UInt> & filter_elements) {
			AKANTU_DEBUG_IN();

			UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
			UInt nb_degree_of_freedom =
			elementary_vect.getNbComponent() / nb_nodes_per_element;
			Array<Real> array_localy_assembeled(this->mesh->getNbNodes(),
			nb_degree_of_freedom);

			array_localy_assembeled.clear();

			this->assembleElementalArrayLocalArray(
			elementary_vect, array_localy_assembeled, type, ghost_type, scale_factor,
			filter_elements);

			this->assembleToLumpedMatrix(dof_id, array_localy_assembeled, lumped_mtx, 1);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			DOFManager::DOFData::DOFData(const ID & dof_id)
			: support_type(_dst_generic), group_support("mesh"), dof(NULL),
			blocked_dofs(NULL), increment(NULL), previous(NULL),
			solution(0, 1, dof_id + ":solution"),
			local_equation_number(0, 1, dof_id + ":local_equation_number") {}

			/* -------------------------------------------------------------------------- */
			DOFManager::DOFData::~DOFData() {}

			/* -------------------------------------------------------------------------- */
			DOFManager::DOFData & DOFManager::getNewDOFData(const ID & dof_id) {
			DOFStorage::iterator it = this->dofs.find(dof_id);
			if (it != this->dofs.end()) {
			AKANTU_EXCEPTION("This dof array has already been registered");
			}

			DOFData * dofs_storage = new DOFData(dof_id);
			this->dofs[dof_id] = dofs_storage;
			return *dofs_storage;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerDOFsInternal(const ID & dof_id,
			Array<Real> & dofs_array) {
			DOFData & dofs_storage = this->getDOFData(dof_id);
			dofs_storage.dof = &dofs_array;

			UInt nb_local_dofs = 0;
			UInt nb_pure_local = 0;

			const DOFSupportType &support_type = dofs_storage.support_type;

			switch (support_type) {
			case _dst_nodal: {
			UInt nb_nodes = 0;
			const ID & group = dofs_storage.group_support;

			NodeGroup * node_group = NULL;
			if (group == "mesh") {
			nb_nodes = this->mesh->getNbNodes();
			} else {
			node_group = &this->mesh->getElementGroup(group).getNodeGroup();
			nb_nodes = node_group->getSize();
			}

			nb_local_dofs = nb_nodes;
			AKANTU_DEBUG_ASSERT(
			dofs_array.getSize() == nb_local_dofs,
			"The array of dof is too shot to be associated to nodes.");

			for (UInt n = 0; n < nb_nodes; ++n) {
			UInt node = n;
			if (node_group)
			node = node_group->getNodes()(n);

			nb_pure_local += this->mesh->isLocalOrMasterNode(node) ? 1 : 0;
			}

			nb_pure_local *= dofs_array.getNbComponent();
			nb_local_dofs *= dofs_array.getNbComponent();
			break;
			}
			case _dst_generic: {
			nb_local_dofs = nb_pure_local =
			dofs_array.getSize() * dofs_array.getNbComponent();
			break;
			}
			default: { AKANTU_EXCEPTION("This type of dofs is not handled yet."); }
			}

			this->pure_local_system_size += nb_pure_local;
			this->local_system_size += nb_local_dofs;

			StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator();
			comm.allReduce(nb_pure_local, _so_sum);

			this->system_size += nb_pure_local;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerDOFs(const ID & dof_id, Array<Real> & dofs_array,
			const DOFSupportType & support_type) {
			DOFData & dofs_storage = this->getNewDOFData(dof_id);
			dofs_storage.support_type = support_type;

			this->registerDOFsInternal(dof_id, dofs_array);
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerDOFs(const ID & dof_id, Array<Real> & dofs_array,
			const ID & support_group) {
			DOFData & dofs_storage = this->getNewDOFData(dof_id);
			dofs_storage.support_type = _dst_nodal;
			dofs_storage.group_support = support_group;

			this->registerDOFsInternal(dof_id, dofs_array);

			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerDOFsPrevious(const ID & dof_id, Array<Real> & array) {
			DOFData & dof = this->getDOFData(dof_id);

			if (dof.previous != NULL) {
			AKANTU_EXCEPTION("The previous dofs array for "
			<< dof_id << " has already been registered");
			}

			dof.previous = &array;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerDOFsIncrement(const ID & dof_id, Array<Real> & array) {
			DOFData & dof = this->getDOFData(dof_id);

			if (dof.increment != NULL) {
			AKANTU_EXCEPTION("The dofs increment array for "
			<< dof_id << " has already been registered");
			}

			dof.increment = &array;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerDOFsDerivative(const ID & dof_id, UInt order,
			Array<Real> & dofs_derivative) {
			DOFData & dof = this->getDOFData(dof_id);
			std::vector<Array<Real> *> & derivatives = dof.dof_derivatives;

			if (derivatives.size() < order) {
			derivatives.resize(order, NULL);
			} else {
			if (derivatives[order - 1] != NULL) {
			AKANTU_EXCEPTION("The dof derivatives of order "
			<< order << " already been registered for this dof ("
			<< dof_id << ")");
			}
			}

			derivatives[order - 1] = &dofs_derivative;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerBlockedDOFs(const ID & dof_id,
			Array<bool> & blocked_dofs) {
			DOFData & dof = this->getDOFData(dof_id);

			if (dof.blocked_dofs != NULL) {
			AKANTU_EXCEPTION("The blocked dofs array for "
			<< dof_id << " has already been registered");
			}

			dof.blocked_dofs = &blocked_dofs;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::splitSolutionPerDOFs() {
			DOFStorage::iterator it = this->dofs.begin();
			DOFStorage::iterator end = this->dofs.end();

			for (; it != end; ++it) {
			DOFData & dof_data = *it->second;
			dof_data.solution.resize(dof_data.dof->getSize() *
			dof_data.dof->getNbComponent());
			this->getSolutionPerDOFs(it->first, dof_data.solution);
			}
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerSparseMatrix(const ID & matrix_id,
			SparseMatrix & matrix) {
			SparseMatricesMap::const_iterator it = this->matrices.find(matrix_id);
			if (it != this->matrices.end()) {
			AKANTU_EXCEPTION("The matrix " << matrix_id << " already exists in "
			<< this->id);
			}

			this->matrices[matrix_id] = &matrix;
			}

			/* -------------------------------------------------------------------------- */
			/// Get an instance of a new SparseMatrix
			Array<Real> & DOFManager::getNewLumpedMatrix(const ID & id) {
			ID matrix_id = this->id + ":lumped_mtx:" + id;
			LumpedMatricesMap::const_iterator it = this->lumped_matrices.find(matrix_id);
			if (it != this->lumped_matrices.end()) {
			AKANTU_EXCEPTION("The lumped matrix " << matrix_id << " already exists in "
			<< this->id);
			}

			Array<Real> & mtx = this->alloc<Real>(matrix_id, this->local_system_size, 1);
			this->lumped_matrices[matrix_id] = &mtx;
			return mtx;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerNonLinearSolver(const ID & non_linear_solver_id,
			NonLinearSolver & non_linear_solver) {
			NonLinearSolversMap::const_iterator it =
			this->non_linear_solvers.find(non_linear_solver_id);
			if (it != this->non_linear_solvers.end()) {
			AKANTU_EXCEPTION("The non linear solver " << non_linear_solver_id
			<< " already exists in "
			<< this->id);
			}

			this->non_linear_solvers[non_linear_solver_id] = &non_linear_solver;
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::registerTimeStepSolver(const ID & time_step_solver_id,
			TimeStepSolver & time_step_solver) {
			TimeStepSolversMap::const_iterator it =
			this->time_step_solvers.find(time_step_solver_id);
			if (it != this->time_step_solvers.end()) {
			AKANTU_EXCEPTION("The non linear solver " << time_step_solver_id
			<< " already exists in "
			<< this->id);
			}

			this->time_step_solvers[time_step_solver_id] = &time_step_solver;
			}

			/* -------------------------------------------------------------------------- */
			SparseMatrix & DOFManager::getMatrix(const ID & id) {
			ID matrix_id = this->id + ":mtx:" + id;
			SparseMatricesMap::const_iterator it = this->matrices.find(matrix_id);
			if (it == this->matrices.end()) {
			AKANTU_SILENT_EXCEPTION("The matrix " << matrix_id << " does not exists in "
			<< this->id);
			}

			return *(it->second);
			}

			/* -------------------------------------------------------------------------- */
			bool DOFManager::hasMatrix(const ID & id) const {
			ID mtx_id = this->id + ":mtx:" + id;
			SparseMatricesMap::const_iterator it = this->matrices.find(mtx_id);
			return it != this->matrices.end();
			}

			/* -------------------------------------------------------------------------- */
			Array<Real> & DOFManager::getLumpedMatrix(const ID & id) {
			ID matrix_id = this->id + ":lumped_mtx:" + id;
			LumpedMatricesMap::const_iterator it = this->lumped_matrices.find(matrix_id);
			if (it == this->lumped_matrices.end()) {
			AKANTU_SILENT_EXCEPTION("The lumped matrix "
			<< matrix_id << " does not exists in " << this->id);
			}

			return *(it->second);
			}

			/* -------------------------------------------------------------------------- */
			const Array<Real> & DOFManager::getLumpedMatrix(const ID & id) const {
			ID matrix_id = this->id + ":lumped_mtx:" + id;
			LumpedMatricesMap::const_iterator it = this->lumped_matrices.find(matrix_id);
			if (it == this->lumped_matrices.end()) {
			AKANTU_SILENT_EXCEPTION("The lumped matrix "
			<< matrix_id << " does not exists in " << this->id);
			}

			return *(it->second);
			}

			/* -------------------------------------------------------------------------- */
			bool DOFManager::hasLumpedMatrix(const ID & id) const {
			ID mtx_id = this->id + ":lumped_mtx:" + id;
			LumpedMatricesMap::const_iterator it = this->lumped_matrices.find(mtx_id);
			return it != this->lumped_matrices.end();
			}

			/* -------------------------------------------------------------------------- */
			NonLinearSolver & DOFManager::getNonLinearSolver(const ID & id) {
			ID non_linear_solver_id = this->id + ":nls:" + id;
			NonLinearSolversMap::const_iterator it =
			this->non_linear_solvers.find(non_linear_solver_id);
			if (it == this->non_linear_solvers.end()) {
			AKANTU_EXCEPTION("The non linear solver " << non_linear_solver_id
			<< " does not exists in "
			<< this->id);
			}

			return *(it->second);
			}

			/* -------------------------------------------------------------------------- */
			bool DOFManager::hasNonLinearSolver(const ID & id) const {
			ID solver_id = this->id + ":nls:" + id;
			NonLinearSolversMap::const_iterator it =
			this->non_linear_solvers.find(solver_id);
			return it != this->non_linear_solvers.end();
			}

			/* -------------------------------------------------------------------------- */
			TimeStepSolver & DOFManager::getTimeStepSolver(const ID & id) {
			ID time_step_solver_id = this->id + ":tss:" + id;
			TimeStepSolversMap::const_iterator it =
			this->time_step_solvers.find(time_step_solver_id);
			if (it == this->time_step_solvers.end()) {
			AKANTU_EXCEPTION("The non linear solver " << time_step_solver_id
			<< " does not exists in "
			<< this->id);
			}

			return *(it->second);
			}

			/* -------------------------------------------------------------------------- */
			bool DOFManager::hasTimeStepSolver(const ID & solver_id) const {
			ID time_step_solver_id = this->id + ":tss:" + solver_id;
			TimeStepSolversMap::const_iterator it =
			this->time_step_solvers.find(time_step_solver_id);
			return it != this->time_step_solvers.end();
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::fillNodesToElements() {
			UInt spatial_dimension = this->mesh->getSpatialDimension();
			Element e;

			UInt nb_nodes = this->mesh->getNbNodes();
			for (UInt n = 0; n < nb_nodes; ++n) {
			this->nodes_to_elements[n]->clear();
			}

			for (ghost_type_t::iterator gt = ghost_type_t::begin();
			gt != ghost_type_t::end(); ++gt) {
			Mesh::type_iterator first =
			this->mesh->firstType(spatial_dimension, *gt, _ek_not_defined);
			Mesh::type_iterator last =
			this->mesh->lastType(spatial_dimension, *gt, _ek_not_defined);
			e.ghost_type = *gt;
			for (; first != last; ++first) {
			ElementType type = *first;
			e.type = type;
			e.kind = Mesh::getKind(type);
			UInt nb_element = this->mesh->getNbElement(type, *gt);
			Array<UInt>::const_iterator<Vector<UInt>> conn_it =
			this->mesh->getConnectivity(type, *gt).begin(
			Mesh::getNbNodesPerElement(type));

			for (UInt el = 0; el < nb_element; ++el, ++conn_it) {
			e.element = el;
			const Vector<UInt> & conn = *conn_it;
			for (UInt n = 0; n < conn.size(); ++n)
			nodes_to_elements[conn(n)]->insert(e);
			}
			}
			}
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::savePreviousDOFs(const ID & dofs_id) {
			this->getPreviousDOFs(dofs_id).copy(this->getDOFs(dofs_id));
			}

			/* -------------------------------------------------------------------------- */
			/* Mesh Events */
			/* -------------------------------------------------------------------------- */
			void DOFManager::onNodesAdded(const Array<UInt> & nodes_list,
			__attribute__((unused))
			const NewNodesEvent & event) {
			Array<UInt>::const_scalar_iterator it = nodes_list.begin();
			Array<UInt>::const_scalar_iterator end = nodes_list.end();

			UInt nb_nodes = this->mesh->getNbNodes();
			this->nodes_to_elements.resize(nb_nodes);

			for (; it != end; ++it) {
			this->nodes_to_elements[*it] = new std::set<Element>();
			}
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::onNodesRemoved(const Array<UInt> & nodes_list,
			const Array<UInt> & new_numbering,
			__attribute__((unused))
			const RemovedNodesEvent & event) {
			Array<UInt>::const_scalar_iterator it = nodes_list.begin();
			Array<UInt>::const_scalar_iterator end = nodes_list.end();
			for (; it != end; ++it) {
			delete this->nodes_to_elements[*it];
			}

			this->mesh->removeNodesFromArray(this->nodes_to_elements, new_numbering);
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::onElementsAdded(const Array<Element> & elements_list,
			__attribute__((unused))
			const NewElementsEvent & event) {
			Array<Element>::const_scalar_iterator it = elements_list.begin();
			Array<Element>::const_scalar_iterator end = elements_list.end();

			for (; it != end; ++it) {
			const Element & elem = *it;
			if (this->mesh->getSpatialDimension(elem.type) !=
			this->mesh->getSpatialDimension())
			continue;

			const Array<UInt> & conn =
			this->mesh->getConnectivity(elem.type, elem.ghost_type);

			UInt nb_nodes_per_elem = this->mesh->getNbNodesPerElement(elem.type);

			for (UInt n = 0; n < nb_nodes_per_elem; ++n) {
			nodes_to_elements[conn(elem.element, n)]->insert(elem);
			}
			}
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::onElementsRemoved(
			__attribute__((unused)) const Array<Element> & elements_list,
			__attribute__((unused)) const ElementTypeMapArray<UInt> & new_numbering,
			__attribute__((unused)) const RemovedElementsEvent & event) {
			this->fillNodesToElements();
			}

			/* -------------------------------------------------------------------------- */
			void DOFManager::onElementsChanged(
			__attribute__((unused)) const Array<Element> & old_elements_list,
			__attribute__((unused)) const Array<Element> & new_elements_list,
			__attribute__((unused)) const ElementTypeMapArray<UInt> & new_numbering,
			__attribute__((unused)) const ChangedElementsEvent & event) {
			this->fillNodesToElements();
			}

			/* -------------------------------------------------------------------------- */

			} // akantu

rAKA/src/model/dof_manager.ccca61d1994699bugfixes/46-bug-in…

dof_manager.ccView Options

rAKA/src/model/dof_manager.cc
ca61d1994699bugfixes/46-bug-in…

dof_manager.cc
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