Dune::GeometryGrid< HostGrid, CoordFunction, Allocator > Class Template Reference

grid wrapper replacing the geometries More...

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

Classes
struct	Codim
	traits structure containing types for a codimension More...

Traits
typedef GridFamily::Traits	Traits
	type of the grid traits

Iterator Types
typedef Traits::HierarchicIterator	HierarchicIterator
	iterator over the grid hierarchy
typedef Traits::LeafIntersectionIterator	LeafIntersectionIterator
	iterator over intersections with other entities on the leaf level
typedef Traits::LevelIntersectionIterator	LevelIntersectionIterator
	iterator over intersections with other entities on the same level

Grid View Types
typedef GridFamily::Traits::LeafGridView	LeafGridView
	type of view for leaf grid
typedef GridFamily::Traits::LevelGridView	LevelGridView
	type of view for level grid

Index and Id Set Types
typedef Traits::LeafIndexSet	LeafIndexSet
	type of leaf index set More...
typedef Traits::LevelIndexSet	LevelIndexSet
	type of level index set More...
typedef Traits::GlobalIdSet	GlobalIdSet
	type of global id set More...
typedef Traits::LocalIdSet	LocalIdSet
	type of local id set More...

Miscellaneous Types
typedef Traits::ctype	ctype
	type of vector coordinates (e.g., double)
typedef Traits::Communication	Communication
	communicator with all other processes having some part of the grid

Construction and Destruction
	GeometryGrid (HostGrid &hostGrid, CoordFunction &coordFunction, const Allocator &allocator=Allocator())
	constructor More...
	GeometryGrid (std::shared_ptr< HostGrid > hostGrid, std::shared_ptr< CoordFunction > coordFunction, const Allocator &allocator=Allocator())
	constructor More...
	GeometryGrid (std::shared_ptr< HostGrid > hostGrid, const Allocator &allocator=Allocator())
	constructor More...

Size Methods
int	maxLevel () const
	obtain maximal grid level More...
int	size (int level, int codim) const
	obtain number of entities on a level More...
int	size (int codim) const
	obtain number of leaf entities More...
int	size (int level, GeometryType type) const
	obtain number of entities on a level More...
int	size (GeometryType type) const
	obtain number of leaf entities More...
size_t	numBoundarySegments () const
	returns the number of boundary segments within the macro grid More...

Parallel Data Distribution and Communication Methods
const Communication &	comm () const
	obtain Communication object More...
template<class EntitySeed >
Traits::template Codim< EntitySeed::codimension >::Entity	entity (const EntitySeed &seed) const
	obtain Entity from EntitySeed More...

Grid Views
LevelGridView	levelGridView (int level) const
	View for a grid level.
LeafGridView	leafGridView () const
	View for the leaf grid.

Miscellaneous Methods
const HostGrid &	hostGrid () const
	obtain constant reference to the host grid
HostGrid &	hostGrid ()
	obtain mutable reference to the host grid
void	update ()
	update grid caches More...
const CoordFunction &	coordFunction () const
	obtain constant reference to the coordinate function
CoordFunction &	coordFunction ()
	obtain mutable reference to the coordinate function.

Detailed Description

template<class HostGrid, class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>
class Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >

grid wrapper replacing the geometries

GeometryGrid wraps another DUNE grid and replaces its geometry by the generic geometries from dune-grid. These are linear (respectively n-linear) DUNE geometries interpolating some given corners. These corners are obtained by mapping the corners of the host grid's geometry (also called host geometry) by a coordinate function.

An example of a coordinate function is given by the following code:

class ExampleFunction
: public Dune :: AnalyticalCoordFunction< double, 2, 3, ExampleFunction >
{
  typedef ExampleFunction This;
  typedef Dune :: AnalyticalCoordFunction< double, 2, 3, This > Base;
 
public:
  typedef Base :: DomainVector DomainVector;
  typedef Base :: RangeVector RangeVector;
 
  void evaluate ( const DomainVector &x, RangeVector &y ) const
  {
    y[ 0 ] = x[ 0 ];
    y[ 1 ] = x[ 1 ];
    y[ 2 ] = x[ 0 ] + x[ 1 ];
  }
};

Note

A dune-fem Function can be used as a coordinate function. The evaluation of discrete functions would be very expensive, though.

Template Parameters

HostGrid	DUNE grid to be wrapped (called host grid)
CoordFunction	coordinate function

Examples

recipe-geometry-grid.cc.

Member Typedef Documentation

GlobalIdSet

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

typedef Traits::GlobalIdSet Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::GlobalIdSet

type of global id set

The id set assigns a unique identifier to each entity within the grid. This identifier is unique over all processes sharing this grid.

Note

Id's are neither consecutive nor necessarily of an integral type.

The global id set is a model of Dune::IdSet.

LeafIndexSet

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

typedef Traits::LeafIndexSet Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::LeafIndexSet

type of leaf index set

The index set assigns consecutive indices to the entities of the leaf grid. The indices are of integral type and can be used to access arrays.

The leaf index set is a model of Dune::IndexSet.

LevelIndexSet

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

typedef Traits::LevelIndexSet Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::LevelIndexSet

type of level index set

The index set assigns consecutive indices to the entities of a grid level. The indices are of integral type and can be used to access arrays.

The level index set is a model of Dune::IndexSet.

LocalIdSet

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

typedef Traits::LocalIdSet Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::LocalIdSet

type of local id set

The id set assigns a unique identifier to each entity within the grid. This identifier needs only to be unique over this process.

Though the local id set may be identical to the global id set, it is often implemented more efficiently.

Note

Ids are neither consecutive nor necessarily of an integral type.

Local ids need not be compatible with global ids. Also, no mapping from local ids to global ones needs to exist.

The global id set is a model of Dune::IdSet.

Constructor & Destructor Documentation

GeometryGrid() [1/3]

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::GeometryGrid ( HostGrid &  hostGrid, CoordFunction &  coordFunction, const Allocator &  allocator = Allocator()  )

inline

constructor

The references to host grid and coordinate function are stored in the grid. Therefore, they must remain valid until the grid is destroyed.

Parameters

[in]	hostGrid	reference to the grid to wrap
[in]	coordFunction	reference to the coordinate function
[in]	allocator	storage allocator

GeometryGrid() [2/3]

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::GeometryGrid ( std::shared_ptr< HostGrid >  hostGrid, std::shared_ptr< CoordFunction >  coordFunction, const Allocator &  allocator = Allocator()  )

inline

constructor

The grid takes ownership of the pointers to host grid and coordinate function. They will be deleted when the grid is destroyed.

Parameters

[in]	hostGrid	shared pointer to the grid to wrap
[in]	coordFunction	shared pointer to the coordinate function
[in]	allocator	storage allocator

GeometryGrid() [3/3]

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::GeometryGrid ( std::shared_ptr< HostGrid >  hostGrid, const Allocator &  allocator = Allocator()  )

inline

constructor

The grid takes ownership of the pointer to host grid and it will be deleted when the grid is destroyed. The coordinate function is automatically constructed.

Parameters

[in]	hostGrid	shared pointer to the grid to wrap
[in]	allocator	storage allocator

Member Function Documentation

comm()

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

const Communication & Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::comm ( ) const

inline

obtain Communication object

The Communication object should be used to globally communicate information between all processes sharing this grid.

Note

The Communication object returned is identical to the one returned by the host grid.

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::hostGrid().

entity()

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

template<class EntitySeed >

Traits::template Codim< EntitySeed::codimension >::Entity Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::entity ( const EntitySeed &  seed ) const

inline

obtain Entity from EntitySeed

EntitySeed survives to a grid modification which only changes the grid coordinates. Therefore it is consistent to use an EntitySeed to rebuild an Entity after this kind of grid modification.

An example of this is given by the following code:

// store seed of the first entity in the leaf view
const auto& gv = grid.leafGridView();
const auto& entity = (*(gv.template begin<0>()));
auto seed = entity.seed();
 
// perform a grid modification
grid.coordFunction().setTime(t);
 
// rebuild first entity from the seed
const auto& newEntity = grid.entity(seed);

maxLevel()

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

int Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::maxLevel ( ) const

inline

obtain maximal grid level

Grid levels are numbered 0, ..., L, where L is the value returned by this method.

Returns

maximal grid level

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::hostGrid().

Referenced by Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::update().

numBoundarySegments()

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

size_t Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::numBoundarySegments ( ) const

inline

returns the number of boundary segments within the macro grid

Returns

number of boundary segments within the macro grid

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::hostGrid().

size() [1/4]

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

int Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::size ( GeometryType  type ) const

inline

obtain number of leaf entities

Returns

number of leaf entities with a geometry of type type

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::leafGridView().

size() [2/4]

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

int Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::size ( int  codim ) const

inline

obtain number of leaf entities

Parameters

[in]

codim

codimension to consider

Returns

number of leaf entities of codimension codim

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::leafGridView().

size() [3/4]

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

int Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::size ( int  level, GeometryType  type  ) const

inline

obtain number of entities on a level

Parameters

[in]	level	level to consider
[in]	type	geometry type to consider

Returns

number of entities with a geometry of type type on grid level level.

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::levelGridView().

size() [4/4]

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

int Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::size ( int  level, int  codim  ) const

inline

obtain number of entities on a level

Parameters

[in]	level	level to consider
[in]	codim	codimension to consider

Returns

number of entities of codimension codim on grid level level.

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::levelGridView().

update()

template<class HostGrid , class CoordFunction = DefaultCoordFunction< HostGrid >, class Allocator = std::allocator< void >>

void Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::update ( )

inline

update grid caches

This method has to be called whenever the underlying host grid changes.

Note

If you adapt the host grid through this geometry grid's adaptation or load balancing methods, update is automatically called.

References Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::coordFunction(), and Dune::GeometryGrid< HostGrid, CoordFunction, Allocator >::maxLevel().

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

• dune/grid/geometrygrid/declaration.hh
• dune/grid/geometrygrid/grid.hh