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Reference documentation for deal.II version 8.1.0
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#include <mg_transfer.h>
Public Member Functions | |
MGTransferPrebuilt () | |
MGTransferPrebuilt (const ConstraintMatrix &constraints, const MGConstrainedDoFs &mg_constrained_dofs) | |
virtual | ~MGTransferPrebuilt () |
template<int dim, int spacedim> | |
void | build_matrices (const DoFHandler< dim, spacedim > &mg_dof) |
virtual void | prolongate (const unsigned int to_level, VECTOR &dst, const VECTOR &src) const |
virtual void | restrict_and_add (const unsigned int from_level, VECTOR &dst, const VECTOR &src) const |
template<int dim, class InVector , int spacedim> | |
void | copy_to_mg (const DoFHandler< dim, spacedim > &mg_dof, MGLevelObject< VECTOR > &dst, const InVector &src) const |
template<int dim, class OutVector , int spacedim> | |
void | copy_from_mg (const DoFHandler< dim, spacedim > &mg_dof, OutVector &dst, const MGLevelObject< VECTOR > &src) const |
template<int dim, class OutVector , int spacedim> | |
void | copy_from_mg_add (const DoFHandler< dim, spacedim > &mg_dof, OutVector &dst, const MGLevelObject< VECTOR > &src) const |
void | set_component_to_block_map (const std::vector< unsigned int > &map) |
DeclException0 (ExcNoProlongation) | |
DeclException0 (ExcMatricesNotBuilt) | |
std::size_t | memory_consumption () const |
void | print_matrices (std::ostream &os) const |
void | print_indices (std::ostream &os) const |
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virtual | ~MGTransferBase () |
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Subscriptor () | |
Subscriptor (const Subscriptor &) | |
virtual | ~Subscriptor () |
Subscriptor & | operator= (const Subscriptor &) |
void | subscribe (const char *identifier=0) const |
void | unsubscribe (const char *identifier=0) const |
unsigned int | n_subscriptions () const |
void | list_subscribers () const |
DeclException3 (ExcInUse, int, char *, std::string &,<< "Object of class "<< arg2<< " is still used by "<< arg1<< " other objects.\n"<< "(Additional information: "<< arg3<< ")\n"<< "Note the entry in the Frequently Asked Questions of "<< "deal.II (linked to from http://www.dealii.org/) for "<< "more information on what this error means.") | |
DeclException2 (ExcNoSubscriber, char *, char *,<< "No subscriber with identifier \""<< arg2<< "\" did subscribe to this object of class "<< arg1) | |
template<class Archive > | |
void | serialize (Archive &ar, const unsigned int version) |
Private Attributes | |
std::vector< types::global_dof_index > | sizes |
std::vector< std_cxx1x::shared_ptr< typename internal::MatrixSelector< VECTOR >::Sparsity > > | prolongation_sparsities |
std::vector< std_cxx1x::shared_ptr< typename internal::MatrixSelector< VECTOR >::Matrix > > | prolongation_matrices |
std::vector< std::vector< std::pair< types::global_dof_index, unsigned int > > > | copy_indices |
std::vector< std::vector< std::pair< types::global_dof_index, unsigned int > > > | copy_indices_to_me |
std::vector< std::vector< std::pair< types::global_dof_index, unsigned int > > > | copy_indices_from_me |
std::vector< unsigned int > | component_to_block_map |
std::vector< std::vector< bool > > | interface_dofs |
SmartPointer< const ConstraintMatrix, MGTransferPrebuilt< VECTOR > > | constraints |
SmartPointer< const MGConstrainedDoFs, MGTransferPrebuilt< VECTOR > > | mg_constrained_dofs |
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 112 of file mg_transfer.h.
MGTransferPrebuilt< VECTOR >::MGTransferPrebuilt | ( | ) |
Constructor without constraint matrices. Use this constructor only with discontinuous finite elements or with no local refinement.
MGTransferPrebuilt< VECTOR >::MGTransferPrebuilt | ( | const ConstraintMatrix & | constraints, |
const MGConstrainedDoFs & | mg_constrained_dofs | ||
) |
Constructor with constraint matrices as well as mg_constrained_dofs.
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virtual |
Destructor.
void MGTransferPrebuilt< VECTOR >::build_matrices | ( | const DoFHandler< dim, spacedim > & | mg_dof | ) |
Actually build the prolongation matrices for each level.
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Prolongate a vector from level to_level-1
to level to_level
. The previous content of dst
is overwritten.
Implements MGTransferBase< VECTOR >.
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virtual |
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 degress of freedom, the result of the restriction is added.
Implements MGTransferBase< VECTOR >.
void MGTransferPrebuilt< VECTOR >::copy_to_mg | ( | const DoFHandler< dim, spacedim > & | mg_dof, |
MGLevelObject< VECTOR > & | dst, | ||
const InVector & | src | ||
) | const |
Transfer from a vector on the global grid to vectors defined on each of the levels separately, i.a. an MGVector
.
Definition at line 152 of file mg_transfer.templates.h.
void MGTransferPrebuilt< VECTOR >::copy_from_mg | ( | const DoFHandler< dim, spacedim > & | mg_dof, |
OutVector & | dst, | ||
const MGLevelObject< VECTOR > & | src | ||
) | const |
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.
Definition at line 187 of file mg_transfer.templates.h.
void MGTransferPrebuilt< VECTOR >::copy_from_mg_add | ( | const DoFHandler< dim, spacedim > & | mg_dof, |
OutVector & | dst, | ||
const MGLevelObject< VECTOR > & | src | ||
) | const |
Add a multi-level vector to a normal vector.
Works as the previous function, but probably not for continuous elements.
Definition at line 232 of file mg_transfer.templates.h.
void MGTransferPrebuilt< VECTOR >::set_component_to_block_map | ( | const std::vector< unsigned int > & | map | ) |
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.
Definition at line 274 of file mg_transfer.templates.h.
MGTransferPrebuilt< VECTOR >::DeclException0 | ( | ExcNoProlongation | ) |
Finite element does not provide prolongation matrices.
MGTransferPrebuilt< VECTOR >::DeclException0 | ( | ExcMatricesNotBuilt | ) |
You have to call build_matrices() before using this object.
std::size_t MGTransferPrebuilt< VECTOR >::memory_consumption | ( | ) | const |
Memory used by this object.
Definition at line 281 of file mg_transfer.templates.h.
void MGTransferPrebuilt< VECTOR >::print_matrices | ( | std::ostream & | os | ) | const |
Print all the matrices for debugging purposes.
void MGTransferPrebuilt< VECTOR >::print_indices | ( | std::ostream & | os | ) | const |
Print the copy index fields for debugging purposes.
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Sizes of the multi-level vectors.
Definition at line 254 of file mg_transfer.h.
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Sparsity patterns for transfer matrices.
Definition at line 259 of file mg_transfer.h.
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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 266 of file mg_transfer.h.
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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 277 of file mg_transfer.h.
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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 287 of file mg_transfer.h.
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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 297 of file mg_transfer.h.
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The vector that stores what has been given to the set_component_to_block_map() function.
Definition at line 306 of file mg_transfer.h.
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Degrees of freedom on the refinement edge excluding those on the boundary.
Definition at line 313 of file mg_transfer.h.
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The constraints of the global system.
Definition at line 318 of file mg_transfer.h.
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The mg_constrained_dofs of the level systems.
Definition at line 324 of file mg_transfer.h.