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

Inheritance diagram for MGTransferBlockSelect< number >:

Public Member Functions
	MGTransferBlockSelect ()

	MGTransferBlockSelect (const MGConstrainedDoFs &mg_constrained_dofs)

virtual	~MGTransferBlockSelect () override=default

template<int dim, int spacedim>
void	build (const DoFHandler< dim, spacedim > &dof_handler, unsigned int selected)

template<int dim, int spacedim>
void	build_matrices (const DoFHandler< dim, spacedim > &dof, const DoFHandler< dim, spacedim > &mg_dof, unsigned int selected)

void	select (const unsigned int block)

virtual void	prolongate (const unsigned int to_level, Vector< number > &dst, const Vector< number > &src) const override

virtual void	restrict_and_add (const unsigned int from_level, Vector< number > &dst, const Vector< number > &src) const override

template<int dim, typename number2 , int spacedim>
void	copy_to_mg (const DoFHandler< dim, spacedim > &dof_handler, MGLevelObject< Vector< number >> &dst, const Vector< number2 > &src) const

template<int dim, typename number2 , int spacedim>
void	copy_from_mg (const DoFHandler< dim, spacedim > &dof_handler, Vector< number2 > &dst, const MGLevelObject< Vector< number >> &src) const

template<int dim, typename number2 , int spacedim>
void	copy_from_mg_add (const DoFHandler< dim, spacedim > &dof_handler, Vector< number2 > &dst, const MGLevelObject< Vector< number >> &src) const

template<int dim, typename number2 , int spacedim>
void	copy_to_mg (const DoFHandler< dim, spacedim > &dof_handler, MGLevelObject< Vector< number >> &dst, const BlockVector< number2 > &src) const

template<int dim, typename number2 , int spacedim>
void	copy_from_mg (const DoFHandler< dim, spacedim > &dof_handler, BlockVector< number2 > &dst, const MGLevelObject< Vector< number >> &src) const

template<int dim, typename number2 , int spacedim>
void	copy_from_mg_add (const DoFHandler< dim, spacedim > &dof_handler, BlockVector< number2 > &dst, const MGLevelObject< Vector< number >> &src) const

std::size_t	memory_consumption () const

Public Member Functions inherited from MGTransferBase< Vector< number > >
virtual	~MGTransferBase () override=default

Public Member Functions inherited from Subscriptor
	Subscriptor ()

	Subscriptor (const Subscriptor &)

	Subscriptor (Subscriptor &&) noexcept

virtual	~Subscriptor ()

Subscriptor &	operator= (const Subscriptor &)

Subscriptor &	operator= (Subscriptor &&) noexcept

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)

Private Member Functions
template<int dim, class OutVector , int spacedim>
void	do_copy_from_mg (const DoFHandler< dim, spacedim > &dof_handler, OutVector &dst, const MGLevelObject< Vector< number >> &src, const unsigned int offset) const

template<int dim, class OutVector , int spacedim>
void	do_copy_from_mg_add (const DoFHandler< dim, spacedim > &dof_handler, OutVector &dst, const MGLevelObject< Vector< number >> &src, const unsigned int offset) const

template<int dim, class InVector , int spacedim>
void	do_copy_to_mg (const DoFHandler< dim, spacedim > &dof_handler, MGLevelObject< Vector< number >> &dst, const InVector &src, const unsigned int offset) const

Private Member Functions inherited from MGTransferBlockBase
	MGTransferBlockBase ()

	MGTransferBlockBase (const MGConstrainedDoFs &mg_constrained_dofs)

std::size_t	memory_consumption () const

template<int dim, int spacedim>
void	build (const DoFHandler< dim, spacedim > &dof_handler)

template<int dim, int spacedim>
void	build_matrices (const DoFHandler< dim, spacedim > &dof, const DoFHandler< dim, spacedim > &mg_dof)

Private Attributes
unsigned int	selected_block

Private Attributes inherited from MGTransferBlockBase
std::vector< bool >	selected

unsigned int	n_mg_blocks

std::vector< unsigned int >	mg_block

std::vector< std::vector< types::global_dof_index > >	sizes

std::vector< types::global_dof_index >	block_start

std::vector< std::vector< types::global_dof_index > >	mg_block_start

std::vector< std::shared_ptr< BlockSparseMatrix< double > > >	prolongation_matrices

std::vector< std::vector< std::vector< std::pair< unsigned int, unsigned int > > > >	copy_indices

SmartPointer< const MGConstrainedDoFs, MGTransferBlockBase >	mg_constrained_dofs

Additional Inherited Members
Static Public Member Functions inherited from Subscriptor
static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

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

Static Private Member Functions inherited from MGTransferBlockBase
static ::ExceptionBase &	ExcMatricesNotBuilt ()

Detailed Description

template<typename number>
class MGTransferBlockSelect< number >

Implementation of the MGTransferBase interface for block matrices and simple vectors. This class uses MGTransferBlockBase selecting a single block. The intergrid transfer operators are implemented for Vector objects, The copy functions between regular and multigrid vectors for Vector and BlockVector.

See MGTransferBase to find out which of the transfer classes is best for your needs.

Author: Guido Kanschat, 2001, 2002, 2003

Definition at line 330 of file mg_transfer_block.h.

Constructor & Destructor Documentation

◆ MGTransferBlockSelect() [1/2]

template<typename number >

MGTransferBlockSelect< number >::MGTransferBlockSelect

Constructor without constraint matrices. Use this constructor only with discontinuous finite elements or with no local refinement.

Definition at line 249 of file multigrid.cc.

◆ MGTransferBlockSelect() [2/2]

template<typename number >

MGTransferBlockSelect< number >::MGTransferBlockSelect ( const MGConstrainedDoFs & mg_constrained_dofs )

Constructor with constraint matrices as well as mg_constrained_dofs.

Definition at line 256 of file multigrid.cc.

◆ ~MGTransferBlockSelect()

template<typename number >

virtual MGTransferBlockSelect< number >::~MGTransferBlockSelect ( )

overridevirtualdefault

Destructor.

Member Function Documentation

◆ build()

template<typename number >

template<int dim, int spacedim>

void MGTransferBlockSelect< number >::build	(	const DoFHandler< dim, spacedim > &	dof_handler,
		unsigned int	selected
	)

Actually build the prolongation matrices for grouped blocks.

This function is a front-end for the same function in MGTransferBlockBase.

Parameters

dof_handler	The DoFHandler to use.
selected	Number of the block for which the transfer matrices should be built.

Definition at line 494 of file mg_transfer_block.cc.

◆ build_matrices()

template<typename number >

template<int dim, int spacedim>

void MGTransferBlockSelect< number >::build_matrices	(	const DoFHandler< dim, spacedim > &	dof,
		const DoFHandler< dim, spacedim > &	mg_dof,
		unsigned int	selected
	)

Actually build the prolongation matrices for grouped blocks.

This function is a front-end for the same function in MGTransferBlockBase.

Parameters

dof	The DoFHandler for the active degrees of freedom to use.
mg_dof	The DoFHandler for the level degrees of freedom to use.
selected	Number of the block of the global vector to be copied from and to the multilevel vector.

Definition at line 483 of file mg_transfer_block.cc.

◆ select()

template<typename number >

void MGTransferBlockSelect< number >::select ( const unsigned int block )

inline

Change selected block. Handle with care!

Definition at line 517 of file mg_transfer_block.h.

◆ prolongate()

template<typename number >

void MGTransferBlockSelect< number >::prolongate	(	const unsigned int	to_level,
		Vector< number > &	dst,
		const Vector< number > &	src
	)		const

overridevirtual

Prolongate a vector from level to_level-1 to level to_level. The previous content of dst is overwritten.

src is a vector with as many elements as there are degrees of freedom on the coarser level involved.

dst has as many elements as there are degrees of freedom on the finer level.

Implements MGTransferBase< Vector< number > >.

Definition at line 266 of file multigrid.cc.

◆ restrict_and_add()

template<typename number >

void MGTransferBlockSelect< number >::restrict_and_add	(	const unsigned int	from_level,
		Vector< number > &	dst,
		const Vector< number > &	src
	)		const

overridevirtual

Restrict a vector from level from_level to level from_level-1 and add this restriction to dst. If the region covered by cells on level from_level is smaller than that of level from_level-1 (local refinement), then some degrees of freedom in dst are active and will not be altered. For the other degrees of freedom, the result of the restriction is added.

src is a vector with as many elements as there are degrees of freedom on the finer level

dst has as many elements as there are degrees of freedom on the coarser level.

Implements MGTransferBase< Vector< number > >.

Definition at line 289 of file multigrid.cc.