#include <deal.II/multigrid/mg_constrained_dofs.h>

Inheritance diagram for MGConstrainedDoFs:

Public Types
using	size_dof = std::vector< std::set< types::global_dof_index > >::size_type

Public Member Functions
template<int dim, int spacedim>
void	initialize (const DoFHandler< dim, spacedim > &dof, const MGLevelObject< IndexSet > &level_relevant_dofs=MGLevelObject< IndexSet >())

template<int dim, int spacedim>
void	make_zero_boundary_constraints (const DoFHandler< dim, spacedim > &dof, const std::set< types::boundary_id > &boundary_ids, const ComponentMask &component_mask=ComponentMask())

void	add_user_constraints (const unsigned int level, const AffineConstraints< double > &constraints_on_level)

template<int dim, int spacedim>
void	make_no_normal_flux_constraints (const DoFHandler< dim, spacedim > &dof, const types::boundary_id bid, const unsigned int first_vector_component)

void	clear ()

bool	is_boundary_index (const unsigned int level, const types::global_dof_index index) const

bool	at_refinement_edge (const unsigned int level, const types::global_dof_index index) const

bool	is_interface_matrix_entry (const unsigned int level, const types::global_dof_index i, const types::global_dof_index j) const

const IndexSet &	get_boundary_indices (const unsigned int level) const

const IndexSet &	get_refinement_edge_indices (unsigned int level) const

bool	have_boundary_indices () const

const AffineConstraints< double > &	get_level_constraints (const unsigned int level) const

const AffineConstraints< double > &	get_user_constraint_matrix (const unsigned int level) const

Private Attributes
std::vector< IndexSet >	boundary_indices

std::vector< IndexSet >	refinement_edge_indices

std::vector< AffineConstraints< double > >	level_constraints

std::vector< AffineConstraints< double > >	user_constraints

Subscriptor functionality
Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class.
std::atomic< unsigned int >	counter

std::map< std::string, unsigned int >	counter_map

std::vector< std::atomic< bool > * >	validity_pointers

const std::type_info *	object_info

void	subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

void	unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

unsigned int	n_subscriptions () const

template<typename StreamType >
void	list_subscribers (StreamType &stream) const

void	list_subscribers () const

template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

using	map_value_type = decltype(counter_map)::value_type

using	map_iterator = decltype(counter_map)::iterator

static std::mutex	mutex

static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

void	check_no_subscribers () const noexcept

Detailed Description

Collection of boundary constraints and refinement edge constraints for level vectors.

Definition at line 46 of file mg_constrained_dofs.h.

Member Typedef Documentation

◆ size_dof

using MGConstrainedDoFs::size_dof = std::vector<std::set<types::global_dof_index> >::size_type

Definition at line 49 of file mg_constrained_dofs.h.

Member Function Documentation

◆ initialize()

template<int dim, int spacedim>

void MGConstrainedDoFs::initialize	(	const DoFHandler< dim, spacedim > &	dof,
		const MGLevelObject< IndexSet > &	level_relevant_dofs = `MGLevelObject<IndexSet>()`
	)

inline

Fill the internal data structures with hanging node constraints extracted from the dof handler object. Works with natural boundary conditions only. There exists a sister function setting up boundary constraints as well.

This function ensures that on every level, degrees of freedom at interior edges of a refinement level are treated corrected but leaves degrees of freedom at the boundary of the domain untouched assuming that no Dirichlet boundary conditions for them exist.

Furthermore, this call sets up an AffineConstraints object on each level that contains possible periodicity constraints in case those have been added to the underlying triangulation. The AffineConstraints object can be queried by get_level_constraints(level). Note that the current implementation of periodicity constraints in this class does not support rotation matrices in the periodicity definition, i.e., the respective argument in the GridTools::collect_periodic_faces() may not be different from the identity matrix. If no level_relevant_dofs are passed as the second argument, the function uses the locally relevant level DoFs, extracted by DoFTools::extract_locally_relevant_level_dofs(). Otherwise, the user-provided IndexSets, which should define a superset of locally relevant DoFs, are used on each level to allow the user to add additional indices to the set of constrained DoFs.

Definition at line 236 of file mg_constrained_dofs.h.

◆ make_zero_boundary_constraints()

template<int dim, int spacedim>

void MGConstrainedDoFs::make_zero_boundary_constraints	(	const DoFHandler< dim, spacedim > &	dof,
		const std::set< types::boundary_id > &	boundary_ids,
		const ComponentMask &	component_mask = `ComponentMask()`
	)

inline

Fill the internal data structures with information about Dirichlet boundary dofs.

The initialize() function has to be called before to set hanging node constraints.

This function can be called multiple times to allow considering different sets of boundary_ids for different components.

Definition at line 338 of file mg_constrained_dofs.h.

◆ add_user_constraints()

void MGConstrainedDoFs::add_user_constraints	(	const unsigned int	level,
		const AffineConstraints< double > &	constraints_on_level
	)

inline

Add user defined constraints to be used on level level.

The user can call this function multiple times and any new, conflicting constraints will overwrite the previous constraints for that DoF.

Before the transfer, the user defined constraints will be distributed to the source vector, and then any DoF index set using make_zero_boundary_constraints() will be overwritten with value zero.

Note: This is currently only implemented for MGTransferMatrixFree.

Definition at line 413 of file mg_constrained_dofs.h.

◆ make_no_normal_flux_constraints()

template<int dim, int spacedim>

void MGConstrainedDoFs::make_no_normal_flux_constraints	(	const DoFHandler< dim, spacedim > &	dof,
		const types::boundary_id	bid,
		const unsigned int	first_vector_component
	)

inline

Fill the internal data structures with information about no normal flux boundary dofs.

This function is limited to meshes whose no normal flux boundaries have faces which are normal to the x-, y-, or z-axis. Also, for a specific boundary id, all faces must be facing in the same direction, i.e., a boundary normal to the x-axis must have a different boundary id than a boundary normal to the y- or z-axis and so on. If the mesh was produced, for example, using the GridGenerator::hyper_cube() function, setting colorize=true during mesh generation and calling make_no_normal_flux_constraints() for each no normal flux boundary is sufficient.

Definition at line 360 of file mg_constrained_dofs.h.

◆ clear()

void MGConstrainedDoFs::clear ( )

inline

Reset the data structures.

Definition at line 432 of file mg_constrained_dofs.h.

◆ is_boundary_index()

bool MGConstrainedDoFs::is_boundary_index	(	const unsigned int	level,
		const types::global_dof_index	index
	)		const

inline

Determine whether a dof index is subject to a boundary constraint.

Definition at line 441 of file mg_constrained_dofs.h.

◆ at_refinement_edge()

bool MGConstrainedDoFs::at_refinement_edge	(	const unsigned int	level,
		const types::global_dof_index	index
	)		const

inline

Determine whether a dof index is at the refinement edge.

Definition at line 452 of file mg_constrained_dofs.h.

◆ is_interface_matrix_entry()

bool MGConstrainedDoFs::is_interface_matrix_entry	(	const unsigned int	level,
		const types::global_dof_index	i,
		const types::global_dof_index	j
	)		const

inline

Determine whether the (i,j) entry of the interface matrix on a given level should be set. This is taken in terms of dof i, that is, return true if i is at a refinement edge, j is not, and both are not on the external boundary.

Definition at line 461 of file mg_constrained_dofs.h.

◆ get_boundary_indices()

const IndexSet & MGConstrainedDoFs::get_boundary_indices ( const unsigned int level ) const

inline

Return the indices of level dofs on the given level that are subject to Dirichlet boundary conditions (as set by the function_map parameter in initialize()). The indices are restricted to the set of locally relevant level dofs.

Definition at line 478 of file mg_constrained_dofs.h.

◆ get_refinement_edge_indices()

const IndexSet & MGConstrainedDoFs::get_refinement_edge_indices ( unsigned int level ) const

inline

Return the indices of dofs on the given level that lie on an refinement edge (dofs on faces to neighbors that are coarser).

Definition at line 487 of file mg_constrained_dofs.h.

◆ have_boundary_indices()

bool MGConstrainedDoFs::have_boundary_indices ( ) const

inline

Return if Dirichlet boundary indices are set in initialize().

Definition at line 496 of file mg_constrained_dofs.h.

◆ get_level_constraints()

const AffineConstraints< double > & MGConstrainedDoFs::get_level_constraints ( const unsigned int level ) const

inline

Return the AffineConstraints object for a given level, containing periodicity constraints (if enabled on the triangulation).

Definition at line 504 of file mg_constrained_dofs.h.

◆ get_user_constraint_matrix()

const AffineConstraints< double > & MGConstrainedDoFs::get_user_constraint_matrix ( const unsigned int level ) const

inline

Return the user defined constraint matrix for a given level. These constraints are set using the function add_user_constraints() and should not contain constraints for DoF indices set in make_zero_boundary_constraints() as they will be overwritten during the transfer.

Definition at line 513 of file mg_constrained_dofs.h.

Member Data Documentation

◆ boundary_indices

std::vector<IndexSet> MGConstrainedDoFs::boundary_indices

private

The indices of boundary dofs for each level.

Definition at line 213 of file mg_constrained_dofs.h.

◆ refinement_edge_indices

std::vector<IndexSet> MGConstrainedDoFs::refinement_edge_indices

private

The degrees of freedom on a given level that live on the refinement edge between the level and cells on a coarser level.

Definition at line 219 of file mg_constrained_dofs.h.

◆ level_constraints

std::vector<AffineConstraints<double> > MGConstrainedDoFs::level_constraints

private

Constraint matrices containing information regarding potential periodic boundary conditions for each level .

Definition at line 225 of file mg_constrained_dofs.h.

◆ user_constraints

std::vector<AffineConstraints<double> > MGConstrainedDoFs::user_constraints

private

Constraint matrices defined by user.

Definition at line 230 of file mg_constrained_dofs.h.

The documentation for this class was generated from the following file:

include/deal.II/multigrid/mg_constrained_dofs.h

Public Types

Public Member Functions

Private Attributes

Subscriptor functionality

Detailed Description

Member Typedef Documentation

◆ size_dof

Member Function Documentation

◆ initialize()

◆ make_zero_boundary_constraints()

◆ add_user_constraints()

◆ make_no_normal_flux_constraints()

◆ clear()

◆ is_boundary_index()

◆ at_refinement_edge()

◆ is_interface_matrix_entry()

◆ get_boundary_indices()

◆ get_refinement_edge_indices()

◆ have_boundary_indices()

◆ get_level_constraints()

◆ get_user_constraint_matrix()

Member Data Documentation

◆ boundary_indices

◆ refinement_edge_indices

◆ level_constraints

◆ user_constraints