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Reference documentation for deal.II version 9.4.1
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Reference documentation for deal.II version 9.4.1
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#include <deal.II/multigrid/mg_transfer.h>
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) |
| 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 |
| virtual void | prolongate_and_add (const unsigned int to_level, VectorType &dst, const VectorType &src) const |
Static Public Member Functions | |
| static ::ExceptionBase & | ExcNoProlongation () |
| static ::ExceptionBase & | ExcMatricesNotBuilt () |
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_index > | sizes |
| 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 int > | component_to_block_map |
| SmartPointer< const MGConstrainedDoFs, MGLevelGlobalTransfer< VectorType > > | mg_constrained_dofs |
Private Member Functions | |
| template<int dim, int spacedim> | |
| void | assert_built (const DoFHandler< dim, spacedim > &dof_handler) const |
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 |
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) |
| 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 |
| using | map_value_type = decltype(counter_map)::value_type |
| using | map_iterator = decltype(counter_map)::iterator |
| static std::mutex | mutex |
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 643 of file mg_transfer.h.
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default |
Constructor without constraint matrices. Use this constructor only with discontinuous finite elements or with no local refinement.
| 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.
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overridevirtualdefault |
Destructor.
| 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.
| 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.
| 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.
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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.
Implements MGTransferBase< VectorType >.
Definition at line 81 of file mg_transfer_prebuilt.cc.
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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.
Implements MGTransferBase< VectorType >.
Definition at line 108 of file mg_transfer_prebuilt.cc.
| std::size_t MGTransferPrebuilt< VectorType >::memory_consumption |
Memory used by this object.
Definition at line 361 of file mg_transfer_prebuilt.cc.
| void MGTransferPrebuilt< VectorType >::print_matrices | ( | std::ostream & | os | ) | const |
Print all the matrices for debugging purposes.
Definition at line 347 of file mg_transfer_prebuilt.cc.
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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.
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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.
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inherited |
Add a multi-level vector to a normal vector.
Works as the previous function, but probably not for continuous elements.
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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.
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inherited |
Print the copy index fields for debugging purposes.
Definition at line 114 of file mg_level_global_transfer.cc.
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protectedinherited |
Internal function to fill copy_indices*. Called by derived classes.
Definition at line 51 of file mg_level_global_transfer.cc.
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privateinherited |
This function is called to make sure that build() has been invoked.
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virtualinherited |
Prolongate a vector from level to_level-1 to level to_level, summing into the previous content of dst.
Reimplemented in MGTransferBlockMatrixFreeBase< dim, Number, TransferType >, MGTransferBlockMatrixFreeBase< dim, Number, MGTransferMatrixFree< dim, Number > >, and MGTransferGlobalCoarsening< dim, VectorType >.
Definition at line 47 of file mg_base.cc.
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private |
Sparsity patterns for transfer matrices.
Definition at line 747 of file mg_transfer.h.
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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 756 of file mg_transfer.h.
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private |
Degrees of freedom on the refinement edge excluding those on the boundary.
Definition at line 762 of file mg_transfer.h.
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protectedinherited |
Sizes of the multi-level vectors.
Definition at line 337 of file mg_transfer.h.
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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 348 of file mg_transfer.h.
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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 359 of file mg_transfer.h.
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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 370 of file mg_transfer.h.
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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 378 of file mg_transfer.h.
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protectedinherited |
The vector that stores what has been given to the set_component_to_block_map() function.
Definition at line 384 of file mg_transfer.h.
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protectedinherited |
The mg_constrained_dofs of the level systems.
Definition at line 390 of file mg_transfer.h.
1.9.5