Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType > Class Template Reference

A meta grid for dividing an existing DUNE grid into subdomains that can be accessed as a grid in their own right. More...

#include <dune/grid/multidomaingrid/multidomaingrid.hh>

Public Types
typedef MDGridTraits::SubDomainIndex	SubDomainIndex
	The (integer) type used to identify subdomains.
typedef subdomain::SubDomainGrid< ThisType >	SubDomainGrid
	The type used for representing the grid of a subdomain, always a specialization of Dune::mdgrid::subdomain::SubDomainGrid.
typedef Traits::LeafSubDomainInterfaceIterator	LeafSubDomainInterfaceIterator
	The type of the iterators over the codim 1 interface between two subdomains on the leaf view.
typedef Traits::LevelSubDomainInterfaceIterator	LevelSubDomainInterfaceIterator
	The type of the iterators over the codim 1 interface between two subdomains on a level view.
typedef Traits::LeafAllSubDomainInterfacesIterator	LeafAllSubDomainInterfacesIterator
	The type of the iterators over the codim 1 interfaces between all subdomains on the leaf view.
typedef Traits::LevelAllSubDomainInterfacesIterator	LevelAllSubDomainInterfacesIterator
	The type of the iterators over the codim 1 interfaces between all subdomains on a level view.

Public Member Functions
const SubDomainIndex	maxSubDomainIndex () const
	The largest allowed index for a subdomain. More...
Constructors
	MultiDomainGrid (const std::shared_ptr< HostGrid > &hostGrid, bool supportLevelIndexSets=true)
	Constructs a new MultiDomainGrid from the given host grid. More...
	MultiDomainGrid (const std::shared_ptr< HostGrid > &hostGrid, const MDGridTraitsType &traits, bool supportLevelIndexSets=true)
	Constructs a new MultiDomainGrid from the given host grid. More...
	MultiDomainGrid (HostGrid &hostGrid, bool supportLevelIndexSets=true)
	Constructs a new MultiDomainGrid from the given host grid. More...
	MultiDomainGrid (HostGrid &hostGrid, const MDGridTraitsType &traits, bool supportLevelIndexSets=true)
	Constructs a new MultiDomainGrid from the given host grid. More...
Dune grid interface methods
template<typename EntitySeed >
Traits::template Codim< EntitySeed::codimension >::Entity	entity (const EntitySeed &entitySeed) const
int	maxLevel () const
	The current maximum level of the grid.
template<int codim>
Traits::template Codim< codim >::LevelIterator	lbegin (int level) const
template<int codim>
Traits::template Codim< codim >::LevelIterator	lend (int level) const
template<int codim, PartitionIteratorType pitype>
Traits::template Codim< codim >::template Partition< pitype >::LevelIterator	lbegin (int level) const
template<int codim, PartitionIteratorType pitype>
Traits::template Codim< codim >::template Partition< pitype >::LevelIterator	lend (int level) const
template<int codim>
Traits::template Codim< codim >::LeafIterator	leafbegin () const
template<int codim>
Traits::template Codim< codim >::LeafIterator	leafend () const
template<int codim, PartitionIteratorType pitype>
Traits::template Codim< codim >::template Partition< pitype >::LeafIterator	leafbegin () const
template<int codim, PartitionIteratorType pitype>
Traits::template Codim< codim >::template Partition< pitype >::LeafIterator	leafend () const
int	size (int level, int codim) const
int	size (int codim) const
int	size (int level, GeometryType type) const
int	size (GeometryType type) const
const Traits::GlobalIdSet &	globalIdSet () const
const Traits::LocalIdSet &	localIdSet () const
const Traits::LevelIndexSet &	levelIndexSet (int level) const
const Traits::LeafIndexSet &	leafIndexSet () const
void	globalRefine (int refCount)
bool	mark (int refCount, const typename Traits::template Codim< 0 >::Entity &e)
int	getMark (const typename Traits::template Codim< 0 >::Entity &e)
bool	preAdapt ()
bool	adapt ()
void	postAdapt ()
int	overlapSize (int level, int codim) const
int	overlapSize (int codim) const
int	ghostSize (int level, int codim) const
int	ghostSize (int codim) const
const Traits::Communication &	comm () const
template<typename DataHandleImp , typename DataTypeImp >
void	communicate (CommDataHandleIF< DataHandleImp, DataTypeImp > &data, InterfaceType iftype, CommunicationDirection dir, int level) const
template<typename DataHandleImp , typename DataTypeImp >
void	communicate (CommDataHandleIF< DataHandleImp, DataTypeImp > &data, InterfaceType iftype, CommunicationDirection dir) const
template<typename DataHandle >
bool	loadBalance (DataHandle &dataHandle)
bool	loadBalance ()
size_t	numBoundarySegments () const
Methods for iterating over subdomain interfaces
LeafSubDomainInterfaceIterator	leafSubDomainInterfaceBegin (SubDomainIndex subDomain1, SubDomainIndex subDomain2) const
	Returns an iterator over the leaf interface of two subdomains. More...
LeafSubDomainInterfaceIterator	leafSubDomainInterfaceEnd (SubDomainIndex subDomain1, SubDomainIndex subDomain2) const
	Returns the corresponding end iterator for leafSubDomainInterfaceBegin().
LevelSubDomainInterfaceIterator	levelSubDomainInterfaceBegin (SubDomainIndex subDomain1, SubDomainIndex subDomain2, int level) const
	Returns an iterator over the interface of two subdomains at the given level. More...
LevelSubDomainInterfaceIterator	levelSubDomainInterfaceEnd (SubDomainIndex subDomain1, SubDomainIndex subDomain2, int level) const
	Returns the corresponding end iterator for levelSubDomainInterfaceBegin(). More...
LeafAllSubDomainInterfacesIterator	leafAllSubDomainInterfacesBegin () const
	Returns an iterator over all subdomain interfaces on the leaf view. More...
LeafAllSubDomainInterfacesIterator	leafAllSubDomainInterfacesEnd () const
	Returns the corresponding end iterator for leafAllSubDomainInterfacesBegin().
LevelAllSubDomainInterfacesIterator	levelAllSubDomainInterfacesBegin (int level) const
	Returns an iterator over all subdomain interfaces on the requested level view. More...
LevelAllSubDomainInterfacesIterator	levelAllSubDomainInterfacesEnd (int level) const
	Returns the corresponding end iterator for levelAllSubDomainInterfacesBegin(). More...
Subdomain creation- and adaptation methods
void	startSubDomainMarking ()
	Prepares the grid for (re-)assigning cells to subdomains. More...
void	preUpdateSubDomains ()
	Calculates the new subdomain layout, but does not update the current subdomains yet. More...
void	updateSubDomains ()
	Switches the subdomain layout over to the new layout.
void	postUpdateSubDomains ()
	clears the saved state of the subdomain layout that was active before the last call to updateSubDomains().
void	addToSubDomain (SubDomainIndex subDomain, const typename Traits::template Codim< 0 >::Entity &e)
	Adds the given leaf entity to the specified subdomain.
void	removeFromSubDomain (SubDomainIndex subDomain, const typename Traits::template Codim< 0 >::Entity &e)
	Removes the given leaf entity from the specified subdomain.
void	assignToSubDomain (SubDomainIndex subDomain, const typename Traits::template Codim< 0 >::Entity &e)
	Assigns the given leaf entity to the specified subdomain, clearing any previous subdomain assignments.
void	removeFromAllSubDomains (const typename Traits::template Codim< 0 >::Entity &e)
	Removes the given leaf entity from all subdomains it currently belongs to.
Access to the subdomain grids
const SubDomainGrid &	subDomain (SubDomainIndex subDomain) const
	Returns a reference to the SubDomainGrid associated with the given subdomain.
SubDomainGrid &	subDomain (SubDomainIndex subDomain)
	Returns a reference to the SubDomainGrid associated with the given subdomain.
SubDomainIndex	maxAssignedSubDomainIndex () const
	Returns the largest subdomain index that was ever assigned to a cell in this grid. More...
bool	supportLevelIndexSets () const
	Indicates whether this MultiDomainGrid instance supports level index sets on its SubDomainGrids.

Static Public Attributes
static const std::size_t	maxNumberOfSubDomains = MDGridTraits::maxSubDomainsPerCell
	The largest number of subdomains any given grid cell may belong to.

Entity conversion methods
const MDGridTraits &	traits () const
template<typename Entity >
Traits::template Codim< Entity::codimension >::Entity	wrapHostEntity (const Entity &e) const
template<int codim>
Traits::template Codim< codim >::Entity	wrapHostEntity (const typename HostGrid::template Codim< codim >::Entity &e) const
template<typename EntityType >
static const HostEntity< EntityType >::type &	hostEntity (const EntityType &e)
	Returns a reference to the corresponding host entity. More...
template<typename EntityType >
static const MultiDomainEntity< EntityType >::type &	multiDomainEntity (const EntityType &e)
template<typename IntersectionType >
static const auto &	multiDomainIntersection (const IntersectionType &is)

Detailed Description

template<typename HostGrid_, typename MDGridTraitsType>
class Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >

A meta grid for dividing an existing DUNE grid into subdomains that can be accessed as a grid in their own right.

Template Parameters

HostGrid	The type of the underlying grid implementation.
MDGridTraitsType	A traits type for customizing how the MultiDomainGrid manages the partitioning information.

Constructor & Destructor Documentation

MultiDomainGrid() [1/4]

template<typename HostGrid_ , typename MDGridTraitsType >

Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::MultiDomainGrid ( const std::shared_ptr< HostGrid > &  hostGrid, bool  supportLevelIndexSets = true  )

inlineexplicit

Constructs a new MultiDomainGrid from the given host grid.

Parameters

hostGrid	the host grid that will be wrapped by the MultiDomainGrid
supportLevelIndexSets	flag indicating support for level index sets on subdomains

MultiDomainGrid() [2/4]

template<typename HostGrid_ , typename MDGridTraitsType >

Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::MultiDomainGrid ( const std::shared_ptr< HostGrid > &  hostGrid, const MDGridTraitsType &  traits, bool  supportLevelIndexSets = true  )

inlineexplicit

Constructs a new MultiDomainGrid from the given host grid.

Parameters

hostGrid	the host grid that will be wrapped by the MultiDomainGrid
traits	an instance of the grid traits, which might contain runtime information
supportLevelIndexSets	flag indicating support for level index sets on subdomains

MultiDomainGrid() [3/4]

template<typename HostGrid_ , typename MDGridTraitsType >

Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::MultiDomainGrid ( HostGrid &  hostGrid, bool  supportLevelIndexSets = true  )

inlineexplicit

Constructs a new MultiDomainGrid from the given host grid.

Parameters

hostGrid	the host grid that will be wrapped by the MultiDomainGrid
supportLevelIndexSets	flag indicating support for level index sets on subdomains

MultiDomainGrid() [4/4]

template<typename HostGrid_ , typename MDGridTraitsType >

Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::MultiDomainGrid ( HostGrid &  hostGrid, const MDGridTraitsType &  traits, bool  supportLevelIndexSets = true  )

inlineexplicit

Constructs a new MultiDomainGrid from the given host grid.

Parameters

hostGrid	the host grid that will be wrapped by the MultiDomainGrid
traits	an instance of the grid traits, which might contain runtime information
supportLevelIndexSets	flag indicating support for level index sets on subdomains

Member Function Documentation

hostEntity()

template<typename HostGrid_ , typename MDGridTraitsType >

template<typename EntityType >

static const HostEntity< EntityType >::type & Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::hostEntity ( const EntityType &  e )

inlinestatic

Returns a reference to the corresponding host entity.

Warning

The returned reference will only be valid as long as the passed-in reference to the MultiDomainGrid entity! If you need a persistent host entity object , copy the returned reference.

leafAllSubDomainInterfacesBegin()

template<typename HostGrid_ , typename MDGridTraitsType >

LeafAllSubDomainInterfacesIterator Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::leafAllSubDomainInterfacesBegin ( ) const

inline

Returns an iterator over all subdomain interfaces on the leaf view.

This method returns an iterator that will visit all pairwise surface interfaces between subdomains on the leaf view. In particular, given to adjacent cells $e_1$ and $e_2$ and two subdomains $s_1$ and $s_2$, this iterator will visit the intersection between $e_1$ and $e_2$ iff all of the following hold:

$$\begin{eqnarray*} e_1 \in s_1,\ e_1 \not\in s_2,\\ e_2 \not\in s_1,\ e_1 \in s_2.\end{eqnarray*}$$

In essence, the two subdomains have to be locally disjoint on $e_1$ and $e_2$.

The iterator will only traverse the host grid once for visiting all subdomain interfaces. Incrementing the iterator might thus result in an iterator pointing to the same grid intersection, but to a different pair of subdomains. The subdomains pointed to by the iterator can be retrieved by calling LeafAllSubDomainInterfacesIterator::subDomain1() and LeafAllSubDomainInterfacesIterator::subDomain2(), respectively.

leafSubDomainInterfaceBegin()

template<typename HostGrid_ , typename MDGridTraitsType >

LeafSubDomainInterfaceIterator Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::leafSubDomainInterfaceBegin ( SubDomainIndex  subDomain1, SubDomainIndex  subDomain2  ) const

inline

Returns an iterator over the leaf interface of two subdomains.

The resulting iterator will visit all cell intersections that are part of both subdomains.

Attention

The iterator assumes the two subdomains to be non-overlapping! If there is an overlap, some intersections will be iterated over twice!

Parameters

subDomain1	the first subdomain
subDomain2	the second subdomain

levelAllSubDomainInterfacesBegin()

template<typename HostGrid_ , typename MDGridTraitsType >

LevelAllSubDomainInterfacesIterator Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::levelAllSubDomainInterfacesBegin ( int  level ) const

inline

Returns an iterator over all subdomain interfaces on the requested level view.

This method returns an iterator that will visit all pairwise surface interfaces between subdomains on the requested level view. In particular, given to adjacent cells $e_1$ and $e_2$ and two subdomains $s_1$ and $s_2$, this iterator will visit the intersection between $e_1$ and $e_2$ iff all of the following hold:

$$\begin{eqnarray*} e_1 \in s_1,\ e_1 \not\in s_2,\\ e_2 \not\in s_1,\ e_1 \in s_2.\end{eqnarray*}$$

In essence, the two subdomains have to be locally disjoint on $e_1$ and $e_2$.

The iterator will only traverse the host grid once for visiting all subdomain interfaces. Incrementing the iterator might thus result in an iterator pointing to the same grid intersection, but to a different pair of subdomains. The subdomains pointed to by the iterator can be retrieved by calling LevelAllSubDomainInterfacesIterator::subDomain1() and LevelAllSubDomainInterfacesIterator::subDomain2(), respectively.

Parameters

level

the grid level to be iterated over.

levelAllSubDomainInterfacesEnd()

template<typename HostGrid_ , typename MDGridTraitsType >

LevelAllSubDomainInterfacesIterator Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::levelAllSubDomainInterfacesEnd ( int  level ) const

inline

Returns the corresponding end iterator for levelAllSubDomainInterfacesBegin().

Parameters

level

the grid level to be iterated over.

levelSubDomainInterfaceBegin()

template<typename HostGrid_ , typename MDGridTraitsType >

LevelSubDomainInterfaceIterator Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::levelSubDomainInterfaceBegin ( SubDomainIndex  subDomain1, SubDomainIndex  subDomain2, int  level  ) const

inline

Returns an iterator over the interface of two subdomains at the given level.

The resulting iterator will visit all cell intersections that are part of both subdomains.

Attention

The iterator assumes the two subdomains to be non-overlapping! If there is an overlap, some intersections will be iterated over twice!

Parameters

subDomain1	the first subdomain
subDomain2	the second subdomain
level	the grid level over which to iterate

levelSubDomainInterfaceEnd()

template<typename HostGrid_ , typename MDGridTraitsType >

LevelSubDomainInterfaceIterator Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::levelSubDomainInterfaceEnd ( SubDomainIndex  subDomain1, SubDomainIndex  subDomain2, int  level  ) const

inline

Returns the corresponding end iterator for levelSubDomainInterfaceBegin().

Parameters

level

the grid level to be iterated over.

maxAssignedSubDomainIndex()

template<typename HostGrid_ , typename MDGridTraitsType >

SubDomainIndex Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::maxAssignedSubDomainIndex ( ) const

inline

Returns the largest subdomain index that was ever assigned to a cell in this grid.

This method returns the largest subdomain index that was passed to addToSubDomain() or assignToSubDomain() since this MultiDomainGrid was created. Keep in mind that the subdomain belonging to that index might not contain any entities anymore if all entities have been removed from it at a later point.

maxSubDomainIndex()

template<typename HostGrid_ , typename MDGridTraitsType >

const SubDomainIndex Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::maxSubDomainIndex ( ) const

inline

The largest allowed index for a subdomain.

Note

As subdomain indices always start at 0, this also determines the maximum number of possible subdomains.

preUpdateSubDomains()

template<typename HostGrid_ , typename MDGridTraitsType >

void Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::preUpdateSubDomains ( )

inline

Calculates the new subdomain layout, but does not update the current subdomains yet.

After calling this method, you can query the grid for the changes that will occur when the new subdomain layout becomes active. This includes the possibility to obtain the new indices entities will be assigned in the modified subdomains.

To switch the grid over to the new layout, call updateSubDomains().

References Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::maxLevel().

startSubDomainMarking()

template<typename HostGrid_ , typename MDGridTraitsType >

void Dune::mdgrid::MultiDomainGrid< HostGrid_, MDGridTraitsType >::startSubDomainMarking ( )

inline

Prepares the grid for (re-)assigning cells to subdomains.

After calling this method, it becomes possible to invoke the various methods for cell assignment to subdomains. When you are done marking, call preUpdateSubDomains().

IMPORTANT: Reassigning subdomains and grid adaptation are mutually exclusive, it is not possibly to do both at the same time. This restriction is enforced by the grid.

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

• dune/grid/multidomaingrid/entity.hh
• dune/grid/multidomaingrid/multidomaingrid.hh