Reference documentation for deal.II version Git ede8f93e86 2020-12-03 14:59:20 -0700
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Public Member Functions | Static Public Member Functions | Protected Member Functions | Protected Attributes | Private Attributes | List of all members
MGTransferPrebuilt< VectorType > Class Template Reference

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

Inheritance diagram for MGTransferPrebuilt< VectorType >:
[legend]

Public Member Functions

 MGTransferPrebuilt ()=default
 
 MGTransferPrebuilt (const MGConstrainedDoFs &mg_constrained_dofs)
 
virtual ~MGTransferPrebuilt () override=default
 
void initialize_constraints (const MGConstrainedDoFs &mg_constrained_dofs)
 
void clear ()
 
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_handler)
 
virtual void prolongate (const unsigned int to_level, VectorType &dst, const VectorType &src) const override
 
virtual void restrict_and_add (const unsigned int from_level, VectorType &dst, const VectorType &src) const override
 
std::size_t memory_consumption () const
 
void print_matrices (std::ostream &os) const
 
template<int dim, class InVector , int spacedim>
void copy_to_mg (const DoFHandler< dim, spacedim > &dof_handler, MGLevelObject< VectorType > &dst, const InVector &src) const
 
template<int dim, class OutVector , int spacedim>
void copy_from_mg (const DoFHandler< dim, spacedim > &dof_handler, OutVector &dst, const MGLevelObject< VectorType > &src) const
 
template<int dim, class OutVector , int spacedim>
void copy_from_mg_add (const DoFHandler< dim, spacedim > &dof_handler, OutVector &dst, const MGLevelObject< VectorType > &src) const
 
void set_component_to_block_map (const std::vector< unsigned int > &map)
 
void print_indices (std::ostream &os) const
 
template<class Archive >
void serialize (Archive &ar, const unsigned int version)
 
Subscriptor functionality

Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class.

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
 

Static Public Member Functions

static ::ExceptionBaseExcNoProlongation ()
 
static ::ExceptionBaseExcMatricesNotBuilt ()
 
static ::ExceptionBaseExcInUse (int arg1, std::string arg2, std::string arg3)
 
static ::ExceptionBaseExcNoSubscriber (std::string arg1, std::string arg2)
 

Protected Member Functions

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

Protected Attributes

std::vector< types::global_dof_indexsizes
 
std::vector< std::vector< std::pair< types::global_dof_index, types::global_dof_index > > > copy_indices
 
std::vector< std::vector< std::pair< types::global_dof_index, types::global_dof_index > > > copy_indices_global_mine
 
std::vector< std::vector< std::pair< types::global_dof_index, types::global_dof_index > > > copy_indices_level_mine
 
bool perform_plain_copy
 
std::vector< unsigned intcomponent_to_block_map
 
SmartPointer< const MGConstrainedDoFs, MGLevelGlobalTransfer< VectorType > > mg_constrained_dofs
 

Private Attributes

std::vector< std::shared_ptr< typename internal::MatrixSelector< VectorType >::Sparsity > > prolongation_sparsities
 
std::vector< std::shared_ptr< typename internal::MatrixSelector< VectorType >::Matrix > > prolongation_matrices
 
std::vector< std::vector< bool > > interface_dofs
 

Detailed Description

template<typename VectorType>
class MGTransferPrebuilt< VectorType >

Implementation of the MGTransferBase interface for which the transfer operations are prebuilt upon construction of the object of this class as matrices. This is the fast way, since it only needs to build the operation once by looping over all cells and storing the result in a matrix for each level, but requires additional memory.

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

Definition at line 657 of file mg_transfer.h.

Constructor & Destructor Documentation

◆ MGTransferPrebuilt() [1/2]

template<typename VectorType>
MGTransferPrebuilt< VectorType >::MGTransferPrebuilt ( )
default

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

◆ MGTransferPrebuilt() [2/2]

template<typename VectorType >
MGTransferPrebuilt< VectorType >::MGTransferPrebuilt ( const MGConstrainedDoFs mg_constrained_dofs)

Constructor with constraints. Equivalent to the default constructor followed by initialize_constraints().

Definition at line 49 of file mg_transfer_prebuilt.cc.

◆ ~MGTransferPrebuilt()

template<typename VectorType>
virtual MGTransferPrebuilt< VectorType >::~MGTransferPrebuilt ( )
overridevirtualdefault

Destructor.

Member Function Documentation

◆ initialize_constraints()

template<typename VectorType >
void MGTransferPrebuilt< VectorType >::initialize_constraints ( const MGConstrainedDoFs mg_constrained_dofs)

Initialize the constraints to be used in build().

Definition at line 59 of file mg_transfer_prebuilt.cc.

◆ clear()

template<typename VectorType >
void MGTransferPrebuilt< VectorType >::clear ( )

Reset the object to the state it had right after the default constructor.

Definition at line 69 of file mg_transfer_prebuilt.cc.

◆ build()

template<typename VectorType >
template<int dim, int spacedim>
void MGTransferPrebuilt< VectorType >::build ( const DoFHandler< dim, spacedim > &  dof_handler)

Actually build the information required for the transfer operations. Needs to be called before prolongate() or restrict_and_add() can be used.

Definition at line 152 of file mg_transfer_prebuilt.cc.

◆ build_matrices()

template<typename VectorType >
template<int dim, int spacedim>
void MGTransferPrebuilt< VectorType >::build_matrices ( const DoFHandler< dim, spacedim > &  dof_handler)

Actually build the prolongation matrices for each level.

Deprecated:
use build() instead.

Definition at line 360 of file mg_transfer_prebuilt.cc.

◆ prolongate()

template<typename VectorType >
void MGTransferPrebuilt< VectorType >::prolongate ( const unsigned int  to_level,
VectorType dst,
const VectorType src 
) const
overridevirtual

Prolongate a vector from level to_level-1 to level to_level using the embedding matrices of the underlying finite element. 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< VectorType >.

Definition at line 81 of file mg_transfer_prebuilt.cc.

◆ restrict_and_add()

template<typename VectorType >
void MGTransferPrebuilt< VectorType >::restrict_and_add ( const unsigned int  from_level,
VectorType dst,
const VectorType src 
) const
overridevirtual

Restrict a vector from level from_level to level from_level-1 using the transpose operation of the prolongate method. 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 involved.
  • dst has as many elements as there are degrees of freedom on the coarser level.

Implements MGTransferBase< VectorType >.

Definition at line 108 of file mg_transfer_prebuilt.cc.

◆ memory_consumption()

template<typename VectorType >
std::size_t MGTransferPrebuilt< VectorType >::memory_consumption ( ) const

Memory used by this object.

Definition at line 384 of file mg_transfer_prebuilt.cc.

◆ print_matrices()

template<typename VectorType >
void MGTransferPrebuilt< VectorType >::print_matrices ( std::ostream &  os) const

Print all the matrices for debugging purposes.

Definition at line 370 of file mg_transfer_prebuilt.cc.

◆ copy_to_mg()

template<typename VectorType >
template<int dim, class InVector , int spacedim>
void MGLevelGlobalTransfer< VectorType >::copy_to_mg ( const DoFHandler< dim, spacedim > &  dof_handler,
MGLevelObject< VectorType > &  dst,
const InVector &  src 
) const
inherited

Transfer from a vector on the global grid to vectors defined on each of the levels separately for the active degrees of freedom. In particular, for a globally refined mesh only the finest level in dst is filled as a plain copy of src. All the other level objects are left untouched.

◆ copy_from_mg()

template<typename VectorType >
template<int dim, class OutVector , int spacedim>
void MGLevelGlobalTransfer< VectorType >::copy_from_mg ( const DoFHandler< dim, spacedim > &  dof_handler,
OutVector &  dst,
const MGLevelObject< VectorType > &  src 
) const
inherited

Transfer from multi-level vector to normal vector.

Copies data from active portions of an MGVector into the respective positions of a Vector<number>. In order to keep the result consistent, constrained degrees of freedom are set to zero.

◆ copy_from_mg_add()

template<typename VectorType >
template<int dim, class OutVector , int spacedim>
void MGLevelGlobalTransfer< VectorType >::copy_from_mg_add ( const DoFHandler< dim, spacedim > &  dof_handler,
OutVector &  dst,
const MGLevelObject< VectorType > &  src 
) const
inherited

Add a multi-level vector to a normal vector.

Works as the previous function, but probably not for continuous elements.

◆ set_component_to_block_map()

template<typename VectorType >
void MGLevelGlobalTransfer< VectorType >::set_component_to_block_map ( const std::vector< unsigned int > &  map)
inherited

If this object operates on BlockVector objects, we need to describe how the individual vector components are mapped to the blocks of a vector. For example, for a Stokes system, we have dim+1 vector components for velocity and pressure, but we may want to use block vectors with only two blocks for all velocities in one block, and the pressure variables in the other.

By default, if this function is not called, block vectors have as many blocks as the finite element has vector components. However, this can be changed by calling this function with an array that describes how vector components are to be grouped into blocks. The meaning of the argument is the same as the one given to the DoFTools::count_dofs_per_component function.

◆ print_indices()

template<typename VectorType >
void MGLevelGlobalTransfer< VectorType >::print_indices ( std::ostream &  os) const
inherited

Print the copy index fields for debugging purposes.

Definition at line 114 of file mg_level_global_transfer.cc.

◆ fill_and_communicate_copy_indices()

template<typename VectorType >
template<int dim, int spacedim>
void MGLevelGlobalTransfer< VectorType >::fill_and_communicate_copy_indices ( const DoFHandler< dim, spacedim > &  dof_handler)
protectedinherited

Internal function to fill copy_indices*. Called by derived classes.

Definition at line 51 of file mg_level_global_transfer.cc.

◆ subscribe()

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

Subscribes a user of the object by storing the pointer validity. The subscriber may be identified by text supplied as identifier.

Definition at line 136 of file subscriptor.cc.

◆ unsubscribe()

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

Unsubscribes a user from the object.

Note
The identifier and the validity pointer must be the same as the one supplied to subscribe().

Definition at line 156 of file subscriptor.cc.

◆ n_subscriptions()

unsigned int Subscriptor::n_subscriptions ( ) const
inlineinherited

Return the present number of subscriptions to this object. This allows to use this class for reference counted lifetime determination where the last one to unsubscribe also deletes the object.

Definition at line 300 of file subscriptor.h.

◆ list_subscribers() [1/2]

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

List the subscribers to the input stream.

Definition at line 317 of file subscriptor.h.

◆ list_subscribers() [2/2]

void Subscriptor::list_subscribers ( ) const
inherited

List the subscribers to deallog.

Definition at line 204 of file subscriptor.cc.

◆ serialize()

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

Read or write the data of this object to or from a stream for the purpose of serialization.

This function does not actually serialize any of the member variables of this class. The reason is that what this class stores is only who subscribes to this object, but who does so at the time of storing the contents of this object does not necessarily have anything to do with who subscribes to the object when it is restored. Consequently, we do not want to overwrite the subscribers at the time of restoring, and then there is no reason to write the subscribers out in the first place.

Definition at line 309 of file subscriptor.h.

Member Data Documentation

◆ prolongation_sparsities

template<typename VectorType>
std::vector< std::shared_ptr<typename internal::MatrixSelector<VectorType>::Sparsity> > MGTransferPrebuilt< VectorType >::prolongation_sparsities
private

Sparsity patterns for transfer matrices.

Definition at line 770 of file mg_transfer.h.

◆ prolongation_matrices

template<typename VectorType>
std::vector< std::shared_ptr<typename internal::MatrixSelector<VectorType>::Matrix> > MGTransferPrebuilt< VectorType >::prolongation_matrices
private

The actual prolongation matrix. column indices belong to the dof indices of the mother cell, i.e. the coarse level. while row indices belong to the child cell, i.e. the fine level.

Definition at line 779 of file mg_transfer.h.

◆ interface_dofs

template<typename VectorType>
std::vector<std::vector<bool> > MGTransferPrebuilt< VectorType >::interface_dofs
private

Degrees of freedom on the refinement edge excluding those on the boundary.

Definition at line 785 of file mg_transfer.h.

◆ sizes

template<typename VectorType >
std::vector<types::global_dof_index> MGLevelGlobalTransfer< VectorType >::sizes
protectedinherited

Sizes of the multi-level vectors.

Definition at line 358 of file mg_transfer.h.

◆ copy_indices

template<typename VectorType >
std::vector< std::vector<std::pair<types::global_dof_index, types::global_dof_index> > > MGLevelGlobalTransfer< VectorType >::copy_indices
protectedinherited

Mapping for the copy_to_mg() and copy_from_mg() functions. Here only index pairs locally owned

The data is organized as follows: one vector per level. Each element of these vectors contains first the global index, then the level index.

Definition at line 369 of file mg_transfer.h.

◆ copy_indices_global_mine

template<typename VectorType >
std::vector< std::vector<std::pair<types::global_dof_index, types::global_dof_index> > > MGLevelGlobalTransfer< VectorType >::copy_indices_global_mine
protectedinherited

Additional degrees of freedom for the copy_to_mg() function. These are the ones where the global degree of freedom is locally owned and the level degree of freedom is not.

Organization of the data is like for copy_indices_mine.

Definition at line 380 of file mg_transfer.h.

◆ copy_indices_level_mine

template<typename VectorType >
std::vector< std::vector<std::pair<types::global_dof_index, types::global_dof_index> > > MGLevelGlobalTransfer< VectorType >::copy_indices_level_mine
protectedinherited

Additional degrees of freedom for the copy_from_mg() function. These are the ones where the level degree of freedom is locally owned and the global degree of freedom is not.

Organization of the data is like for copy_indices_mine.

Definition at line 391 of file mg_transfer.h.

◆ perform_plain_copy

template<typename VectorType >
bool MGLevelGlobalTransfer< VectorType >::perform_plain_copy
protectedinherited

This variable stores whether the copy operation from the global to the level vector is actually a plain copy to the finest level. This means that the grid has no adaptive refinement and the numbering on the finest multigrid level is the same as in the global case.

Definition at line 399 of file mg_transfer.h.

◆ component_to_block_map

template<typename VectorType >
std::vector<unsigned int> MGLevelGlobalTransfer< VectorType >::component_to_block_map
protectedinherited

The vector that stores what has been given to the set_component_to_block_map() function.

Definition at line 405 of file mg_transfer.h.

◆ mg_constrained_dofs

template<typename VectorType >
SmartPointer<const MGConstrainedDoFs, MGLevelGlobalTransfer<VectorType> > MGLevelGlobalTransfer< VectorType >::mg_constrained_dofs
protectedinherited

The mg_constrained_dofs of the level systems.

Definition at line 411 of file mg_transfer.h.


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