Dune::GridFactoryInterface< GridType > Class Template Reference

Provide a generic factory class for unstructured grids. More...

#include <dune/grid/common/gridfactory.hh>

Public Member Functions
	GridFactoryInterface ()
	Default constructor.
virtual	~GridFactoryInterface ()
	virtual destructor
virtual void	insertVertex (const FieldVector< ctype, dimworld > &pos)=0
	Insert a vertex into the coarse grid.
virtual void	insertElement (const GeometryType &type, const std::vector< unsigned int > &vertices)=0
	Insert an element into the coarse grid. More...
virtual void	insertElement (const GeometryType &type, const std::vector< unsigned int > &vertices, const std::shared_ptr< VirtualFunction< FieldVector< ctype, dimension >, FieldVector< ctype, dimworld > > > &elementParametrization)
	Insert a parametrized element into the coarse grid. More...
virtual void	insertBoundarySegment (const std::vector< unsigned int > &vertices)=0
	insert a boundary segment More...
virtual void	insertBoundarySegment (const std::vector< unsigned int > &vertices, const std::shared_ptr< BoundarySegment< dimension, dimworld > > &boundarySegment)
	insert an arbitrarily shaped boundary segment More...
virtual GridType *	createGrid ()=0
	Finalize grid creation and hand over the grid. More...
virtual unsigned int	insertionIndex (const typename Codim< 0 >::Entity &entity) const
	obtain an element's insertion index More...
virtual unsigned int	insertionIndex (const typename Codim< dimension >::Entity &entity) const
	obtain a vertex' insertion index More...
virtual unsigned int	insertionIndex (const typename GridType::LeafIntersection &intersection) const
	obtain a boundary's insertion index More...
virtual bool	wasInserted (const typename GridType::LeafIntersection &intersection) const
	determine whether an intersection was inserted More...

Protected Types
enum
	The grid world dimension.
typedef GridType::ctype	ctype
	Type used by the grid for coordinates.

Static Protected Attributes
static const int	dimension = GridType::dimension
	dimension of the grid

Detailed Description

template<class GridType>
class Dune::GridFactoryInterface< GridType >

Provide a generic factory class for unstructured grids.

This base class declares the interface.

Example use: create a grid consisting of a cube triangulated into 6 tetrahedra:

Left: cube with vertex numbers. Middle: cube triangulated into six tetrahedra. Right: exploded version of the middle figure, with number for the tetrahedra.

Dune::GridFactory<Grid> gf;
 
Dune::FieldVector<typename Grid::ctype, 3> pos;
 
pos[0] = 0; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
pos[0] = 1; pos[1] = 0; pos[2] = 0; gf.insertVertex(pos);
pos[0] = 0; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
pos[0] = 1; pos[1] = 1; pos[2] = 0; gf.insertVertex(pos);
pos[0] = 0; pos[1] = 0; pos[2] = 1; gf.insertVertex(pos);
pos[0] = 1; pos[1] = 0; pos[2] = 1; gf.insertVertex(pos);
pos[0] = 0; pos[1] = 1; pos[2] = 1; gf.insertVertex(pos);
pos[0] = 1; pos[1] = 1; pos[2] = 1; gf.insertVertex(pos);
 
Dune::GeometryType type;
type.makeTetrahedron();
std::vector<unsigned int> vid(4);
 
vid[0] = 0; vid[1] = 1; vid[2] = 3; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 5; vid[2] = 1; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 4; vid[2] = 5; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 6; vid[2] = 4; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 2; vid[2] = 6; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 3; vid[2] = 2; vid[3] = 7; gf.insertElement(type, vid);
 
std::shared_ptr<Grid> gridp(gf.createGrid());

Make sure that the inserted elements are not inverted, since not all grids support that. For instance, in the following code snippet the elements 1, 3 and 5 are inverted while elements 0, 2 and 4 are not.

vid[0] = 0; vid[1] = 1; vid[2] = 3; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 1; vid[2] = 5; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 4; vid[2] = 5; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 4; vid[2] = 6; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 2; vid[2] = 6; vid[3] = 7; gf.insertElement(type, vid);
vid[0] = 0; vid[1] = 2; vid[2] = 3; vid[3] = 7; gf.insertElement(type, vid);

Member Function Documentation

createGrid()

template<class GridType >

virtual GridType * Dune::GridFactoryInterface< GridType >::createGrid ( )

pure virtual

Finalize grid creation and hand over the grid.

The receiver takes responsibility of the memory allocated for the grid

Implemented in Dune::GridFactory< AlbertaGrid< dim, dimworld > >, Dune::GridFactory< GridType >, Dune::GridFactory< Grid >, and Dune::GridFactory< UGGrid< dimworld > >.

insertBoundarySegment() [1/2]

template<class GridType >

virtual void Dune::GridFactoryInterface< GridType >::insertBoundarySegment ( const std::vector< unsigned int > &  vertices )

pure virtual

insert a boundary segment

This method inserts a boundary segment into the coarse grid. Using this method has two advantages over not using it:

• The boundary segment gets an insertion index.
• The grid factory can verify that this is actually a boundary segment

Note

You are not forced to insert all boundary segments. The grid factory will find the remaining boundary segments itself.

Parameters

[in]

vertices

the indices of the vertices of the segment

Implemented in Dune::GridFactory< AlbertaGrid< dim, dimworld > >, Dune::GridFactory< GridType >, Dune::GridFactory< Grid >, and Dune::GridFactory< UGGrid< dimworld > >.

insertBoundarySegment() [2/2]

template<class GridType >

virtual void Dune::GridFactoryInterface< GridType >::insertBoundarySegment ( const std::vector< unsigned int > &  vertices, const std::shared_ptr< BoundarySegment< dimension, dimworld > > &  boundarySegment  )

inlinevirtual

insert an arbitrarily shaped boundary segment

This method inserts a boundary segment into the coarse grid.

Parameters

[in]	vertices	the indices of the vertices of the segment
[in]	boundarySegment	user defined implementation of the boundary segment's geometry

References DUNE_THROW.

insertElement() [1/2]

template<class GridType >

virtual void Dune::GridFactoryInterface< GridType >::insertElement ( const GeometryType &  type, const std::vector< unsigned int > &  vertices  )

pure virtual

Insert an element into the coarse grid.

Parameters

type	The GeometryType of the new element
vertices	The vertices of the new element, using the DUNE numbering

Make sure the inserted element is not inverted (this holds even for simplices). There are grids that can't handle inverted elements.

Implemented in Dune::GridFactory< AlbertaGrid< dim, dimworld > >, Dune::GridFactory< GridType >, Dune::GridFactory< Grid >, and Dune::GridFactory< UGGrid< dimworld > >.

insertElement() [2/2]

template<class GridType >

virtual void Dune::GridFactoryInterface< GridType >::insertElement ( const GeometryType &  type, const std::vector< unsigned int > &  vertices, const std::shared_ptr< VirtualFunction< FieldVector< ctype, dimension >, FieldVector< ctype, dimworld > > > &  elementParametrization  )

inlinevirtual

Insert a parametrized element into the coarse grid.

Parameters

type	The GeometryType of the new element
vertices	The vertices of the new element, using the DUNE numbering
elementParametrization	A function prescribing the shape of this element

Make sure the inserted element is not inverted (this holds even for simplices). There are grids that can't handle inverted elements.

References DUNE_THROW.

insertionIndex() [1/3]

template<class GridType >

virtual unsigned int Dune::GridFactoryInterface< GridType >::insertionIndex ( const typename Codim< 0 >::Entity &  entity ) const

inlinevirtual

obtain an element's insertion index

Data can be associated to the created macro grid using the insertion index of each entity that has been inserted during the grid creation process.

Between grid construction (createGrid) and the first grid modification, this method allows to obtain this insertion index from the grid factory. This way, data can be stored using the index maps provided by the grid.

Parameters

[in]

entity

entity whose insertion index is requested

Returns

insertion index of the entity

Reimplemented in Dune::GridFactory< AlbertaGrid< dim, dimworld > >, and Dune::GridFactory< UGGrid< dimworld > >.

References DUNE_THROW.

Referenced by Dune::GridFactory< AlbertaGrid< dim, dimworld > >::insertionIndex(), and Dune::GridFactory< UGGrid< dimworld > >::wasInserted().

insertionIndex() [2/3]

template<class GridType >

virtual unsigned int Dune::GridFactoryInterface< GridType >::insertionIndex ( const typename Codim< dimension >::Entity &  entity ) const

inlinevirtual

obtain a vertex' insertion index

Data can be associated to the created macro grid using the insertion index of each entity that has been inserted during the grid creation process.

Between grid construction (createGrid) and the first grid modification, this method allows to obtain this insertion index from the grid factory. This way, data can be stored using the index maps provided by the grid.

Parameters

[in]

entity

entity whose insertion index is requested

Returns

insertion index of the entity

Reimplemented in Dune::GridFactory< AlbertaGrid< dim, dimworld > >, and Dune::GridFactory< UGGrid< dimworld > >.

References DUNE_THROW.

insertionIndex() [3/3]

template<class GridType >

virtual unsigned int Dune::GridFactoryInterface< GridType >::insertionIndex ( const typename GridType::LeafIntersection &  intersection ) const

inlinevirtual

obtain a boundary's insertion index

Data can be associated to the created macro grid using the insertion index of each entity that has been inserted during the grid creation process.

Between grid construction (createGrid) and the first grid modification, this method allows to obtain this insertion index from the grid factory. This way, data can be stored using the index maps provided by the grid.

Parameters

[in]

intersection

intersection whose insertion index is requested

Returns

insertion index of the intersection

Note

The insertion index can only be obtained for boundary intersections that were actually inserted (see also wasInserted).

References DUNE_THROW.

wasInserted()

template<class GridType >

virtual bool Dune::GridFactoryInterface< GridType >::wasInserted ( const typename GridType::LeafIntersection &  intersection ) const

inlinevirtual

determine whether an intersection was inserted

This method allows checking whether an intersection was actually inserted into the grid factory.

Note

Not all boundary segments need to be inserted into the grid factory.

This method returns false for all interior intersections

Parameters

[in]

intersection

intersection in question

Returns

true, if the intersection was inserted

References DUNE_THROW.

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

• dune/grid/common/gridfactory.hh