Classes
class	Dune::GridView< ViewTraits >
	Grid view abstract base class. More...

struct	Dune::GridView< ViewTraits >::Codim< cd >
	A struct that collects all associated types of one implementation from the Traits class. More...

struct	Dune::GridView< ViewTraits >::Codim< cd >::Partition< pit >
	Define types needed to iterate over entities of a given partition type. More...

Typedefs
typedef ViewTraits::GridViewImp	Dune::GridView< ViewTraits >::Implementation
	type of underlying implementation More...

typedef ViewTraits	Dune::GridView< ViewTraits >::Traits
	Traits class.

typedef Traits::Grid	Dune::GridView< ViewTraits >::Grid
	type of the grid

typedef Traits::IndexSet	Dune::GridView< ViewTraits >::IndexSet
	type of the index set

typedef Traits::Intersection	Dune::GridView< ViewTraits >::Intersection
	type of the intersection

typedef Traits::IntersectionIterator	Dune::GridView< ViewTraits >::IntersectionIterator
	type of the intersection iterator

using	Dune::GridView< ViewTraits >::Communication = typename Traits ::Communication
	A type that is a model of Dune::Communication. It provides a portable way for communication on the set of processes used by the grid.

typedef Traits::template Codim< cd >::Iterator	Dune::GridView< ViewTraits >::Codim< cd >::Iterator
	type of iterator returned by the grid view

typedef Traits::template Codim< cd >::Entity	Dune::GridView< ViewTraits >::Codim< cd >::Entity
	type of corresponding entity

typedef Traits::template Codim< cd >::Geometry	Dune::GridView< ViewTraits >::Codim< cd >::Geometry
	type of the geometry implementation

typedef Traits::template Codim< cd >::LocalGeometry	Dune::GridView< ViewTraits >::Codim< cd >::LocalGeometry
	type of the implementation for local geometries

typedef Traits::template Codim< cd >::template Partition< pit >::Iterator	Dune::GridView< ViewTraits >::Codim< cd >::Partition< pit >::Iterator
	iterator over a given codim and partition type

typedef Grid::ctype	Dune::GridView< ViewTraits >::ctype
	type used for coordinates in grid

Functions
template<int dim, int dimworld, class ct , class GridFamily >
Grid< dim, dimworld, ct, GridFamily >::LevelGridView	Dune::levelGridView (const Grid< dim, dimworld, ct, GridFamily > &grid, int level)
	level grid view for the given grid and level. More...

template<int dim, int dimworld, class ct , class GridFamily >
Grid< dim, dimworld, ct, GridFamily >::LeafGridView	Dune::leafGridView (const Grid< dim, dimworld, ct, GridFamily > &grid)
	leaf grid view for the given grid More...

Variables
static constexpr bool	Dune::GridView< ViewTraits >::conforming = Traits :: conforming
	Export if this grid view is guaranteed conforming.

static constexpr int	Dune::GridView< ViewTraits >::dimension = Grid :: dimension
	The dimension of the grid.

static constexpr int	Dune::GridView< ViewTraits >::dimensionworld = Grid :: dimensionworld
	The dimension of the world the grid lives in.

Interface for the implementor
Implementation	Dune::GridView< ViewTraits >::impl_

	Dune::GridView< ViewTraits >::GridView (const Implementation &imp)
	constructor (engine concept)

	Dune::GridView< ViewTraits >::GridView (const ThisType &other)
	Copy constructor.

ThisType &	Dune::GridView< ViewTraits >::operator= (const ThisType &other)
	assignment operator

const Grid &	Dune::GridView< ViewTraits >::grid () const
	obtain a const reference to the underlying hierarchic grid

const IndexSet &	Dune::GridView< ViewTraits >::indexSet () const
	obtain the index set More...

int	Dune::GridView< ViewTraits >::size (int codim) const
	obtain number of entities in a given codimension

int	Dune::GridView< ViewTraits >::size (const GeometryType &type) const
	obtain number of entities with a given geometry type

bool	Dune::GridView< ViewTraits >::isConforming () const
	return true if current state of grid view represents a conforming grid

template<class EntityType >
bool	Dune::GridView< ViewTraits >::contains (const EntityType &e) const
	Return true if the given entity is contained in this grid view. More...

template<int cd>
Codim< cd >::Iterator	Dune::GridView< ViewTraits >::begin () const
	obtain begin iterator for this view

template<int cd>
Codim< cd >::Iterator	Dune::GridView< ViewTraits >::end () const
	obtain end iterator for this view

template<int cd, PartitionIteratorType pitype>
Codim< cd >::template Partition< pitype >::Iterator	Dune::GridView< ViewTraits >::begin () const
	obtain begin iterator for this view

template<int cd, PartitionIteratorType pitype>
Codim< cd >::template Partition< pitype >::Iterator	Dune::GridView< ViewTraits >::end () const
	obtain end iterator for this view

IntersectionIterator	Dune::GridView< ViewTraits >::ibegin (const typename Codim< 0 > ::Entity &entity) const
	obtain begin intersection iterator with respect to this view

IntersectionIterator	Dune::GridView< ViewTraits >::iend (const typename Codim< 0 > ::Entity &entity) const
	obtain end intersection iterator with respect to this view

const Communication &	Dune::GridView< ViewTraits >::comm () const
	obtain communication object

int	Dune::GridView< ViewTraits >::overlapSize (int codim) const
	Return size of the overlap region for a given codim on the grid view.

int	Dune::GridView< ViewTraits >::ghostSize (int codim) const
	Return size of the ghost region for a given codim on the grid view.

template<class DataHandleImp , class DataType >
auto	Dune::GridView< ViewTraits >::communicate (CommDataHandleIF< DataHandleImp, DataType > &data, InterfaceType iftype, CommunicationDirection dir) const
	Communicate data on this view.

Implementation &	Dune::GridView< ViewTraits >::impl ()
	access to the underlying implementation More...

const Implementation &	Dune::GridView< ViewTraits >::impl () const
	access to the underlying implementation More...

template<class DataHandleImp , class DataType >
auto	Dune::GridView< ViewTraits >::communicate (CommDataHandleIF< DataHandleImp, DataType > &data, InterfaceType iftype, CommunicationDirection dir, std::integral_constant< bool, false >) const
	Communicate data on this view.

template<class DataHandleImp , class DataType >
auto	Dune::GridView< ViewTraits >::communicate (CommDataHandleIF< DataHandleImp, DataType > &data, InterfaceType iftype, CommunicationDirection dir, std::integral_constant< bool, true >) const
	Communicate data on this view.

Detailed Description

Though a DUNE grid is hierarchic, one often only needs access to a certain subset of the entities in the grid, e.g., all entities on a given level or the leaf entities in the hierarchy. These views are provided by an implementation of GridView. Each grid exports a LevelGridView and a LeafGridView, corresponding to the two different subsets (views) described above.

A grid view provides the following functionality:

The index set for the required subset can be accessed by the indexSet() method.
A pair of begin() / end() methods provide iterators for each codimension.
A pair of ibegin() / iend() methods return suitable intersection iterators for a given entity of codimension 0 in the subset.
For parallel computations, a suitable communicate() method is provided.
The underlying grid can be accessed through the grid() method.

The default GridViews can be obtained from the grid by calling one of the levelGridView() or leafGridView() methods which are provided as both free functions and member functions of the Grid interface class.

Typedef Documentation

◆ Implementation

template<class ViewTraits >

typedef ViewTraits::GridViewImp Dune::GridView< ViewTraits >::Implementation

type of underlying implementation

Warning: Implementation details may change without prior notification.

Function Documentation

◆ contains()

template<class ViewTraits >

template<class EntityType >

bool Dune::GridView< ViewTraits >::contains ( const EntityType & e ) const

inline

Return true if the given entity is contained in this grid view.

Todo:: Currently we call the implementation on the IndexSet. This may lead to suboptimal efficiency.

Note: If the input element e is not an element of the grid, then the result of contains() is undefined.

References Dune::GridView< ViewTraits >::impl().

◆ impl() [1/2]

template<class ViewTraits >

Implementation & Dune::GridView< ViewTraits >::impl ( )

inline

access to the underlying implementation

Warning: Implementation details may change without prior notification.

◆ impl() [2/2]

template<class ViewTraits >

const Implementation & Dune::GridView< ViewTraits >::impl ( ) const

inline

access to the underlying implementation

Warning: Implementation details may change without prior notification.

◆ indexSet()

template<class ViewTraits >

const IndexSet & Dune::GridView< ViewTraits >::indexSet ( ) const

inline

obtain the index set

The lifetime of the returned index set is bound to the lifetime of the grid view. Keep a copy of the grid view to prevent the index set from becoming a dangling reference.

References Dune::GridView< ViewTraits >::impl().

Referenced by checkElementDataMapper(), checkMixedDataMapper(), checkVertexDataMapper(), Dune::GlobalIndexSet< GridView >::GlobalIndexSet(), Dune::GlobalIndexSet< GridView >::index(), Dune::GridPtr< GridType >::parameters(), Dune::GlobalIndexSet< GridView >::subIndex(), and Dune::VTKWriter< GridView >::writeCellFaces().