Dune Core Modules (2.4.2)
interface class for an iterator over grid entities More...
#include <dune/grid/common/entityiterator.hh>
Public Types | |
enum | |
codimension of entity pointer | |
typedef std::conditional< std::is_lvalue_reference< decltype(realIterator.dereference())>::value, constEntity &, Entity >::type | Reference |
Tpy of the reference used when derefencing the Ptr. | |
Public Member Functions | |
EntityIterator & | operator++ () |
prefix increment operator | |
EntityIterator | operator++ (int) |
postfix increment operator | |
const Entity & | operator* () const |
Dereferencing operator. | |
const Entity * | operator-> () const |
Pointer operator. | |
bool | operator== (const EntityIterator &rhs) const |
Checks for equality. | |
bool | operator!= (const EntityIterator &rhs) const |
Checks for inequality. | |
Compare methods | |
bool | operator== (const EntityPointer< Grid, ItImp > &rhs) const |
Checks for equality. Only works for EntityPointers and iterators on the same grid. Due to the conversion operators one can compare all kinds of iterators and EntityPointer. | |
DUNE_ENTITYPOINTER_DEPRECATED_MSG bool | operator== (const Entity &rhs) const |
Compares an EntityPointer with an Entity for equality. More... | |
bool | operator!= (const EntityPointer< Grid, ItImp > &rhs) const |
Checks for inequality. Only works for EntityPointers and iterators on the same grid. Due to the conversion operators one can compare all kinds of iterators and EntityPointer. | |
DUNE_ENTITYPOINTER_DEPRECATED_MSG bool | operator!= (const Entity &rhs) const |
Compares an EntityPointer with an Entity for inequality. More... | |
Query methods | |
int | level () const DUNE_ENTITYPOINTER_DEPRECATED_MSG |
Ask for level of entity. More... | |
Implementor interface | |
bool | equals (const EntityPointer< Grid, ItImp > &rhs) const |
Forward equality check to realIterator. | |
Protected Member Functions | |
Implementation & | impl () |
return reference to the real implementation | |
const Implementation & | impl () const |
return reference to the real implementation | |
Methods and Types of the Entity interface. These are here just for transition purpose | |
enum | |
enum | |
typedef GridImp::template Codim< codimension >::Geometry | Geometry |
The geometry type of this entity. | |
typedef GridImp::template Codim< codimension >::EntitySeed | EntitySeed |
The corresponding entity seed (for storage of entities) | |
typedef GridImp::template Codim< codimension >::LocalGeometry | LocalGeometry |
The geometry type of this entity when the geometry is expressed embedded in the father element. More... | |
typedef GridImp::HierarchicIterator | HierarchicIterator |
The codim==0 EntityPointer type. More... | |
PartitionType | partitionType () const |
Partition type of this entity. | |
Geometry | geometry () const |
obtain geometric realization of the entity More... | |
GeometryType | type () const |
Return the name of the reference element. The type can be used to access the Dune::ReferenceElement. | |
EntitySeed | seed () const |
Return the entity seed which contains sufficient information to generate the entity again and uses as little memory as possible. | |
Codim< codim >::Entity | subEntity (int i) const |
ONLY_CODIM0 bool | hasFather () const |
Return true if entity has a father entity which can be accessed using the father() method. | |
ONLY_CODIM0 bool | isLeaf () const |
Returns true if the entity is contained in the leaf grid. | |
ONLY_CODIM0 bool | isRegular () const |
Returns true if element is of regular type in red/green type refinement. In bisection or hanging node refinement this is always true. | |
ONLY_CODIM0 LocalGeometry | geometryInFather () const |
Provides information how this element has been subdivided from its father element. More... | |
ONLY_CODIM0 HierarchicIterator | hbegin (int maxLevel) const |
Inter-level access to elements that resulted from (recursive) subdivision of this element. More... | |
ONLY_CODIM0 HierarchicIterator | hend (int maxLevel) const |
Returns iterator to one past the last son element. More... | |
ONLY_CODIM0 bool | isNew () const |
Returns true, if the entity has been created during the last call to adapt() | |
ONLY_CODIM0 bool | mightVanish () const |
Returns true, if entity might disappear during the next call to adapt(). If the method returns false, the entity is guaranteed to still be present after adaptation. | |
ONLY_CODIM0 bool | hasBoundaryIntersections () const |
Returns true, if entity has intersections with boundary. | |
Detailed Description
class Dune::EntityIterator< codim, Grid, IteratorImp >
interface class for an iterator over grid entities
An entity iterator is an iterator over a subset of entities within a hierarchical grid. It is an extension of the Dune::EntityPointer interface.
Examples of entity iterators are:
- iterators over the leaf level (LeafGridView::Iterator)
- iterators over a grid level (LevelGridView::Iterator)
- iterators over the children of an entity (Grid::HierarchicIterator)
See also the documentation of Dune::EntityPointer.
- Template Parameters
-
codim codimension of entities this iterator walks over Grid type of the grid implementation IteratorImp type of the iterator implementation
Member Typedef Documentation
◆ HierarchicIterator
|
inherited |
The codim==0 EntityPointer type.
The HierarchicIterator type
◆ LocalGeometry
|
inherited |
The geometry type of this entity when the geometry is expressed embedded in the father element.
This differs from Geometry in particular when dim != dimworld, but even when dim == dimworld the implementation may choose to use a different type here.
Member Function Documentation
◆ geometry()
|
inlineinherited |
obtain geometric realization of the entity
Each entity provides an object of type Dune::Geometry< dimension-codimension, dimensionworld, ... > that represents the map from a reference element to world coordinates.
- Note
- Previously, the geometry was encapsulated in the entity object and a const reference was returned.
- The returned geometry object is guaranteed to remain valid until the grid is modified (or deleted).
◆ geometryInFather()
|
inlineinherited |
Provides information how this element has been subdivided from its father element.
The returned LocalGeometry is a model of Dune::Geometry<dimension,dimension,...>, mapping the reference element of the given entity to the reference element of its father.
This information is sufficient to interpolate all degrees of freedom in the conforming case. Nonconforming may require access to neighbors of the father and calculations with local coordinates. The on-the-fly case is somewhat inefficient since degrees of freedom may be visited several times. If we store interpolation matrices, this is tolerable. We assume that on-the-fly implementation of interpolation is only done for simple discretizations.
- Note
- For ghost entities, this method is not guaranteed to be implemented.
- Previously, the geometry was encapsulated in the entity object and a const reference was returned.
- The returned geometry object is guaranteed to remain valid until the grid is modified (or deleted).
◆ hbegin()
|
inlineinherited |
Inter-level access to elements that resulted from (recursive) subdivision of this element.
- Parameters
-
[in] maxlevel Iterator does not stop at elements with level greater than maxlevel.
- Returns
- Iterator to the first son (level is not greater than maxlevel)
- Note
- If the partitionType of the Entity is GhostEntity, it is not guaranteed that this method is working or implemented in general. For some grids it might be available, though.
◆ hend()
|
inlineinherited |
Returns iterator to one past the last son element.
- Note
- If the partitionType of the Entity is GhostEntity, it is not guaranteed that this method is working or implemented in general. For some grids it might be available, though.
◆ level()
|
inlineinherited |
Ask for level of entity.
This method is redundant and is only there for efficiency reasons. It allows an implementation to return the level without actually constructing the entity.
- Deprecated:
- Will be removed after the release of dune-grid-2.4. Use the method level() from the dereferenced Entity instead.
◆ operator!=()
|
inlineinherited |
Compares an EntityPointer with an Entity for inequality.
- Deprecated:
- This method only exists for backwards compatibility during the 2.4 release cycle and will be removed after dune-grid-2.4 is released.
◆ operator==()
|
inlineinherited |
Compares an EntityPointer with an Entity for equality.
- Deprecated:
- This method only exists for backwards compatibility during the 2.4 release cycle and will be removed after dune-grid-2.4 is released.
The documentation for this class was generated from the following file:
- dune/grid/common/entityiterator.hh