MGTransferBlockSelect< number > Class Template Reference
[Multilevel support]

Inheritance diagram for MGTransferBlockSelect< number >:
Inheritance graph
[legend]

List of all members.

Public Member Functions

virtual ~MGTransferBlockSelect ()
template<int dim, int spacedim>
void build_matrices (const DoFHandler< dim, spacedim > &dof, const MGDoFHandler< 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
virtual void restrict_and_add (const unsigned int from_level, Vector< number > &dst, const Vector< number > &src) const
template<int dim, typename number2 , int spacedim>
void copy_to_mg (const MGDoFHandler< dim, spacedim > &mg_dof, MGLevelObject< Vector< number > > &dst, const Vector< number2 > &src) const
template<int dim, typename number2 , int spacedim>
void copy_from_mg (const MGDoFHandler< dim, spacedim > &mg_dof, Vector< number2 > &dst, const MGLevelObject< Vector< number > > &src) const
template<int dim, typename number2 , int spacedim>
void copy_from_mg_add (const MGDoFHandler< dim, spacedim > &mg_dof, Vector< number2 > &dst, const MGLevelObject< Vector< number > > &src) const
template<int dim, typename number2 , int spacedim>
void copy_to_mg (const MGDoFHandler< dim, spacedim > &mg_dof, MGLevelObject< Vector< number > > &dst, const BlockVector< number2 > &src) const
template<int dim, typename number2 , int spacedim>
void copy_from_mg (const MGDoFHandler< dim, spacedim > &mg_dof, BlockVector< number2 > &dst, const MGLevelObject< Vector< number > > &src) const
template<int dim, typename number2 , int spacedim>
void copy_from_mg_add (const MGDoFHandler< dim, spacedim > &mg_dof, BlockVector< number2 > &dst, const MGLevelObject< Vector< number > > &src) const
unsigned int memory_consumption () const

Private Member Functions

template<int dim, class OutVector , int spacedim>
void do_copy_from_mg (const MGDoFHandler< dim, spacedim > &mg_dof, 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 MGDoFHandler< dim, spacedim > &mg_dof, 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 MGDoFHandler< dim, spacedim > &mg_dof, MGLevelObject< Vector< number > > &dst, const InVector &src, const unsigned int offset) const

Private Attributes

unsigned int selected_block

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

Constructor & Destructor Documentation

template<typename number >
virtual MGTransferBlockSelect< number >::~MGTransferBlockSelect (  )  [virtual]

Destructor.


Member Function Documentation

template<typename number >
template<int dim, int spacedim>
void MGTransferBlockSelect< number >::build_matrices ( const DoFHandler< dim, spacedim > &  dof,
const MGDoFHandler< dim, spacedim > &  mg_dof,
unsigned int  selected 
) [inline]

Actually build the prolongation matrices for grouped blocks.

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

  • selected: Number of the block of the global vector to be copied from and to the multilevel vector.
  • mg_selected: Number of the component for which the transfer matrices should be built.
template<typename number >
void MGTransferBlockSelect< number >::select ( const unsigned int  block  )  [inline]

Change selected block. Handle with care!

References MGTransferBlockSelect< number >::selected_block.

template<typename number >
virtual void MGTransferBlockSelect< number >::prolongate ( const unsigned int  to_level,
Vector< number > &  dst,
const Vector< number > &  src 
) const [virtual]

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 > >.

template<typename number >
virtual void MGTransferBlockSelect< number >::restrict_and_add ( const unsigned int  from_level,
Vector< number > &  dst,
const Vector< number > &  src 
) const [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.

  • 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 > >.

template<typename number >
template<int dim, typename number2 , int spacedim>
void MGTransferBlockSelect< number >::copy_to_mg ( const MGDoFHandler< dim, spacedim > &  mg_dof,
MGLevelObject< Vector< number > > &  dst,
const Vector< number2 > &  src 
) const [inline]

Transfer a single block from a vector on the global grid to a multilevel vector.

template<typename number >
template<int dim, typename number2 , int spacedim>
void MGTransferBlockSelect< number >::copy_from_mg ( const MGDoFHandler< dim, spacedim > &  mg_dof,
Vector< number2 > &  dst,
const MGLevelObject< Vector< number > > &  src 
) const [inline]

Transfer from multilevel vector to normal vector.

Copies data from active portions of an multilevel vector into the respective positions of a Vector.

template<typename number >
template<int dim, typename number2 , int spacedim>
void MGTransferBlockSelect< number >::copy_from_mg_add ( const MGDoFHandler< dim, spacedim > &  mg_dof,
Vector< number2 > &  dst,
const MGLevelObject< Vector< number > > &  src 
) const [inline]

Add a multi-level vector to a normal vector.

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

template<typename number >
template<int dim, typename number2 , int spacedim>
void MGTransferBlockSelect< number >::copy_to_mg ( const MGDoFHandler< dim, spacedim > &  mg_dof,
MGLevelObject< Vector< number > > &  dst,
const BlockVector< number2 > &  src 
) const [inline]

Transfer a block from a vector on the global grid to multilevel vectors. Only the block selected is transfered.

template<typename number >
template<int dim, typename number2 , int spacedim>
void MGTransferBlockSelect< number >::copy_from_mg ( const MGDoFHandler< dim, spacedim > &  mg_dof,
BlockVector< number2 > &  dst,
const MGLevelObject< Vector< number > > &  src 
) const [inline]

Transfer from multilevel vector to normal vector.

Copies data from active portions of a multilevel vector into the respective positions of a global BlockVector.

template<typename number >
template<int dim, typename number2 , int spacedim>
void MGTransferBlockSelect< number >::copy_from_mg_add ( const MGDoFHandler< dim, spacedim > &  mg_dof,
BlockVector< number2 > &  dst,
const MGLevelObject< Vector< number > > &  src 
) const [inline]

Add a multi-level vector to a normal vector.

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

template<typename number >
unsigned int MGTransferBlockSelect< number >::memory_consumption (  )  const

Memory used by this object.

Reimplemented from MGTransferBlockBase.

template<typename number >
template<int dim, class OutVector , int spacedim>
void MGTransferBlockSelect< number >::do_copy_from_mg ( const MGDoFHandler< dim, spacedim > &  mg_dof,
OutVector &  dst,
const MGLevelObject< Vector< number > > &  src,
const unsigned int  offset 
) const [inline, private]

Implementation of the public function.

template<typename number >
template<int dim, class OutVector , int spacedim>
void MGTransferBlockSelect< number >::do_copy_from_mg_add ( const MGDoFHandler< dim, spacedim > &  mg_dof,
OutVector &  dst,
const MGLevelObject< Vector< number > > &  src,
const unsigned int  offset 
) const [inline, private]

Implementation of the public function.

template<typename number >
template<int dim, class InVector , int spacedim>
void MGTransferBlockSelect< number >::do_copy_to_mg ( const MGDoFHandler< dim, spacedim > &  mg_dof,
MGLevelObject< Vector< number > > &  dst,
const InVector &  src,
const unsigned int  offset 
) const [inline, private]

Actual implementation of copy_to_mg().


Member Data Documentation

template<typename number >
unsigned int MGTransferBlockSelect< number >::selected_block [private]

Selected block.

Referenced by MGTransferBlockSelect< number >::select().


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

deal.II documentation generated on Mon Nov 23 22:57:57 2009 by doxygen 1.6.1