Segment of a grid. More...

#include </home/wojtek/Projects/BEM/bempp-sven/bempp/lib/grid/grid_segment.hpp>

Public Member Functions
	GridSegment (const Grid &grid, const std::set< int > &excludedEntitiesCodim0, const std::set< int > &excludedEntitiesCodim1, const std::set< int > &excludedEntitiesCodim2, const std::set< int > &excludedEntitiesCodim3, int level=0)
	Constructor. More...

	GridSegment (int entityCountCodim0, int entityCountCodim1, int entityCountCodim2, int entityCountCodim3, const std::set< int > &excludedEntitiesCodim0, const std::set< int > &excludedEntitiesCodim1, const std::set< int > &excludedEntitiesCodim2, const std::set< int > &excludedEntitiesCodim3)
	Constructor. More...

bool	contains (int codim, int index) const
	Return true if the segment contains the entity of codimension `codim` and index `index`, false otherwise.

void	markExcludedEntities (int codim, std::vector< int > &marks, int mark=-1) const
	Mark array elements corresponding to entities that do not belong to this GridSegment. More...

GridSegment	complement () const
	Return the complement of this grid segment. More...

GridSegment	union_ (const GridSegment &other) const
	Return the union of this GridSegment and the GridSegment `other`. More...

GridSegment	difference (const GridSegment &other) const
	Return the difference of this GridSegment and the GridSegment `other`. More...

GridSegment	intersection (const GridSegment &other) const
	Return the intersection of this GridSegment and the GridSegment `other`. More...

Static Public Member Functions
static GridSegment	wholeGrid (const Grid &grid, int level=0)
	Return a GridSegment representing the whole grid `grid` at a given level (level = -1 for leafView).

static GridSegment	openDomain (const Grid &grid, int domain, int level=0)
	Return a GridSegment representing an open domain of a grid. More...

static GridSegment	closedDomain (const Grid &grid, int domain, int level=0)
	Return a GridSegment representing a closed domain of a grid. More...

Private Attributes
boost::array< int, 4 >	m_entityCounts

boost::array< std::set< int >, 4 >	m_excludedEntities

Detailed Description

Segment of a grid.

This class represent a segment (part) of a grid. You can use it to create spaces of functions defined only on subsets of grids, for example to impose different boundary conditions on different parts of a single grid.

Technically, a grid segment is defined by means of the sets of indices of entities of different codimensions (vertices, edges and elements, for 2D grids) that it contains.

Constructor & Destructor Documentation

Bempp::GridSegment::GridSegment	(	const Grid &	grid,
		const std::set< int > &	excludedEntitiesCodim0,
		const std::set< int > &	excludedEntitiesCodim1,
		const std::set< int > &	excludedEntitiesCodim2,
		const std::set< int > &	excludedEntitiesCodim3,
		int	level = `0`
	)

Constructor.

Construct a new segment of the grid grid including all its constituent entities except those listed in excludedEntitiesCodim0, excludedEntitiesCodim1 and so on (each set contains the indices of entities of a particular codimension that should be excluded from the segment). The indices should correspond to those defined by the leaf view of the grid. The grid reference is used only in the constructor and is not stored in the constructed GridSegment.

References Bempp::Grid::leafView(), and Bempp::Grid::levelView().

Referenced by closedDomain(), complement(), intersection(), openDomain(), union_(), and wholeGrid().

Bempp::GridSegment::GridSegment	(	int	entityCountCodim0,
		int	entityCountCodim1,
		int	entityCountCodim2,
		int	entityCountCodim3,
		const std::set< int > &	excludedEntitiesCodim0,
		const std::set< int > &	excludedEntitiesCodim1,
		const std::set< int > &	excludedEntitiesCodim2,
		const std::set< int > &	excludedEntitiesCodim3
	)

Constructor.

Construct a new segment of a grid including all its constituent entities except those listed in excludedEntitiesCodim0, excludedEntitiesCodim1 and so on (each set contains the indices of entities of a particular codimension that should be excluded from the segment). The indices should correspond to those defined by the leaf view of the grid. The arguments entityCountCodim0, entityCountCodim1 and so on should contain the number of entities of a particular codimension contained in the grid.

Member Function Documentation

GridSegment Bempp::GridSegment::closedDomain	(	const Grid &	grid,
		int	domain,
		int	level = `0`
	)

static

Return a GridSegment representing a closed domain of a grid.

This function returns a GridSegment representing the domain with index domain of the grid grid, including its boundary. The domain index corresponds to the <it>physical entity index</it> in Gmsh files.

References Bempp::acc(), Bempp::Grid::dim(), Bempp::Entity< 0 >::domain(), Bempp::IndexSet::entityIndex(), GridSegment(), Bempp::Grid::leafView(), Bempp::Grid::levelView(), Bempp::Entity< 0 >::subEntityCount(), and Bempp::IndexSet::subEntityIndex().

GridSegment Bempp::GridSegment::complement ( ) const

Return the complement of this grid segment.

The returned GridSegment contains those and only those entities that do not belong to this GridSegment.

References GridSegment().

Referenced by difference().

GridSegment Bempp::GridSegment::difference ( const GridSegment & other ) const

Return the difference of this GridSegment and the GridSegment other.

The returned GridSegment contains those and only those entities that belong to this GridSegment, but do not belong to the GridSegment other.

References complement(), and intersection().

GridSegment Bempp::GridSegment::intersection ( const GridSegment & other ) const

Return the intersection of this GridSegment and the GridSegment other.

The returned GridSegment contains those and only those entities that belong to both this GridSegment and the GridSegment other.

References GridSegment().

Referenced by difference().

void Bempp::GridSegment::markExcludedEntities	(	int	codim,
		std::vector< int > &	marks,
		int	mark = `-1`
	)		const

Mark array elements corresponding to entities that do not belong to this GridSegment.

This function assigns the value mark to all the elements of the vector marks whose indices correspond to entities of codimension codim that do not belong to this GridSegment. All other elements are set to 0.

Note: This function may be removed in future versions of BEM++.

References Bempp::acc().

GridSegment Bempp::GridSegment::openDomain	(	const Grid &	grid,
		int	domain,
		int	level = `0`
	)

static

Return a GridSegment representing an open domain of a grid.

This function returns a GridSegment representing the domain with index domain of the grid grid, not including its boundary. The domain index corresponds to the <it>physical entity index</it> in Gmsh files.

References Bempp::acc(), Bempp::Grid::dim(), Bempp::Entity< 0 >::domain(), Bempp::IndexSet::entityIndex(), GridSegment(), Bempp::Grid::leafView(), Bempp::Grid::levelView(), Bempp::Entity< 0 >::subEntityCount(), and Bempp::IndexSet::subEntityIndex().

GridSegment Bempp::GridSegment::union_ ( const GridSegment & other ) const

Return the union of this GridSegment and the GridSegment other.

The returned GridSegment contains those and only those entities that belong to this GridSegment and/or the GridSegment other.

References GridSegment().

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

/home/wojtek/Projects/BEM/bempp-sven/bempp/lib/grid/grid_segment.hpp
/home/wojtek/Projects/BEM/bempp-sven/bempp/lib/grid/grid_segment.cpp

Public Member Functions

Static Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation