Dune::SEntity< 0, dim, GridImp > Class Template Reference

#include <dune/grid/sgrid.hh>

Public Types
enum
	know your own codimension
enum
	Dimension of the grid.
enum
	Know dimension of the entity.
typedef GridImp::template Codim< cd >::EntitySeed	EntitySeed
	The corresponding entity seed (for storage of entities)

Public Member Functions
template<int cc>
int	count () const
unsigned int	subEntities (unsigned int codim) const
	Return number of subentities with codimension codim.
template<int cc>
Codim< cc >::Entity	subEntity (int i) const
int	subCompressedIndex (int codim, int i) const
	subentity compressed index
int	subCompressedLeafIndex (int codim, int i) const
PersistentIndexType	subPersistentIndex (int codim, int i) const
	subentity persistent index
IntersectionIterator	ibegin () const
IntersectionIterator	iend () const
	Reference to one past the last intersection.
Entity	father () const
	Inter-level access to father element on coarser grid. More...
bool	hasFather () const
	returns true if father entity exists
bool	isLeaf () const
	return true if the entity is leaf
LocalGeometry	geometryInFather () const
	Location of this element relative to the reference element element of the father. More...
HierarchicIterator	hbegin (int maxLevel) const
	Inter-level access to son elements on higher levels<=maxLevel. More...
HierarchicIterator	hend (int maxLevel) const
	Returns iterator to one past the last son.
	SEntity (GridImp *_grid, int _l, int _index)
	constructor
void	make (GridImp *_grid, int _l, int _id)
	Reinitialization.
void	make (int _l, int _id)
	Reinitialization.
int	level () const
	level of this element
int	globalIndex () const
	global index is calculated from the index and grid size
SEntitySeed< codim, GridImp >	seed () const
	Return the entity seed which contains sufficient information to generate the entity again and uses as little memory as possible.
GeometryType	type () const
	return the element type identifier
Geometry	geometry () const
	geometry of this entity
void	makegeometry () const
	geometry of this entity
PersistentIndexType	persistentIndex () const
	globally unique, persistent index
int	compressedIndex () const
	consecutive, codim-wise, level-wise index
int	compressedLeafIndex () const
	consecutive, codim-wise, level-wise index

Protected Attributes
GeometryImpl	geo
	geometry, is only built on demand
bool	builtgeometry
	true if geometry has been constructed

Detailed Description

template<int dim, class GridImp>
class Dune::SEntity< 0, dim, GridImp >

A Grid is a container of grid entities. An entity is parametrized by the codimension. An entity of codimension c in dimension d is a d-c dimensional object.

Entities of codimension 0 ("elements") are defined through template specialization. Note that this specialization has an extended interface compared to the general case

Entities of codimension 0 allow to visit all neighbors, where a neighbor is an entity of codimension 0 which has a common entity of codimension 1 with the entity. These neighbors are accessed via an iterator. This allows the implementation of non-matching meshes. The number of neigbors may be different from the number of faces/edges of an element! A Grid is a container of grid entities. An entity is parametrized by the codimension. An entity of codimension c in dimension d is a d-c dimensional object.

Entities of codimension=0 ("Cells") are defined through template specialization. Note that this specialization has an extended interface compared to the general case

Member Function Documentation

count()

template<int dim, class GridImp >

template<int cc>

int Dune::SEntity< 0, dim, GridImp >::count

(

)

const

Intra-element access to entities of codimension cc > codim. Return number of entities with codimension cc.

father()

template<int dim, class GridImp >

Entity Dune::SEntity< 0, dim, GridImp >::father

(

)

const

Inter-level access to father element on coarser grid.

Assumes that meshes are nested.

geometryInFather()

template<int dim, class GridImp >

LocalGeometry Dune::SEntity< 0, dim, GridImp >::geometryInFather

(

)

const

Location of this element relative to the reference element element of the father.

This is sufficient to interpolate all dofs in conforming case. Nonconforming may require access to neighbors of father and computations with local coordinates. On the fly case is somewhat inefficient since dofs are visited several times. If we store interpolation matrices, this is tolerable. We assume that on-the-fly implementation of numerical algorithms is only done for simple discretizations. Assumes that meshes are nested.

hbegin()

template<int dim, class GridImp >

HierarchicIterator Dune::SEntity< 0, dim, GridImp >::hbegin

(

int

maxLevel

)

const

Inter-level access to son elements on higher levels<=maxLevel.

This is provided for sparsely stored nested unstructured meshes. Returns iterator to first son.

ibegin()

template<int dim, class GridImp >

IntersectionIterator Dune::SEntity< 0, dim, GridImp >::ibegin

(

)

const

Intra-level access to intersections with neighboring elements. A neighbor is an entity of codimension 0 which has an entity of codimension 1 in commen with this entity. Access to neighbors is provided using iterators. This allows meshes to be nonmatching. Returns iterator referencing the first neighbor.

subCompressedLeafIndex()

template<int dim, class GridImp >

int Dune::SEntity< 0, dim, GridImp >::subCompressedLeafIndex ( int  codim, int  i  ) const

inline

subentity leaf index

Todo:

add handling of not-leaf vertices

References Dune::SEntityBase< codim, dim, GridImp, SEntity >::compressedLeafIndex(), Dune::SEntityBase< codim, dim, GridImp, SEntity >::grid, and Dune::SEntityBase< codim, dim, GridImp, SEntity >::l.

subEntity()

template<int dim, class GridImp >

template<int cc>

Codim< cc >::Entity Dune::SEntity< 0, dim, GridImp >::subEntity

(

int

i

)

const

Provide access to mesh entity i of given codimension. Entities are numbered 0 ... count<cc>()-1

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

• dune/grid/sgrid.hh