default implementation for a general operator stencil More...

#include <dune/fem/operator/common/stencil.hh>

Public Types
typedef std::set< DomainGlobalKeyType >	LocalStencilType
	type for storing the stencil of one row

typedef std::vector< std::size_t >::size_type	IndexType
	type of std::vector for indexing

Public Member Functions
	Stencil (const DomainSpace &dSpace, const RangeSpace &rSpace)
	Constructor. More...

void	fill (const DomainEntityType &dEntity, const RangeEntityType &rEntity, bool fillGhost=true) const
	Create stencil entries for (dEntity,rEntity) pair. More...

const LocalStencilType &	localStencil (const RangeGlobalKeyType &key) const
	Return stencil for a given row of the matrix. More...

const GlobalStencilType &	globalStencil () const
	Return the full stencil.

int	maxNonZerosEstimate () const
	Return an upper bound for the maximum number of non-zero entries in all rows.

void	update ()
	clear previously computed entries such that a re-compute happens when used again

Protected Member Functions
virtual void	setupStencil () const =0
	method to setup stencil depending on entity set defined in derived class

Detailed Description

template<class DomainSpace, class RangeSpace>
class Dune::Fem::Stencil< DomainSpace, RangeSpace >

default implementation for a general operator stencil

To assemble a matrix from an operator the method reserve has to be called on the linear operator class passing a stencil object as parameter. To setup a full stencil the method fill has to be called with each pair (en,nb) for which the localMatrix method is called during the assembly.

Template Parameters

DomainSpace	type of discrete function space for the domain
RangeSpace	type of discrete function space for the range

Constructor & Destructor Documentation

◆ Stencil()

template<class DomainSpace , class RangeSpace >

Dune::Fem::Stencil< DomainSpace, RangeSpace >::Stencil	(	const DomainSpace &	dSpace,
		const RangeSpace &	rSpace
	)

inline

Constructor.

Parameters

[in]	dSpace	domain space
[in]	rSpace	range space

Member Function Documentation

◆ fill()

template<class DomainSpace , class RangeSpace >

void Dune::Fem::Stencil< DomainSpace, RangeSpace >::fill	(	const DomainEntityType &	dEntity,
		const RangeEntityType &	rEntity,
		bool	fillGhost = `true`
	)		const