Dune::ACFem::DiracDistribution< DiscreteFunctionSpace > Class Template Reference

Dirac-distribution. More...

#include <dune/acfem/operators/functionals/diracfunctional.hh>

Collaboration diagram for Dune::ACFem::DiracDistribution< DiscreteFunctionSpace >:

Public Member Functions
	DiracDistribution (const DiscreteFunctionSpaceType &space, const GlobalCoordinateType &x0, unsigned component=0)
	Constructor. More...
RangeType	operator() (const Fem::DiscreteFunctionInterface< DFTraits > &arg) const
RangeType	operator() (const Fem::DiscreteFunctionInterface< DFImpl > &arg) const
	Compute the value.
void	coefficients (Fem::DiscreteFunctionInterface< DFTraits > &coeffs)
	Compute the basis representation, which means: do the assembling stuff.
void	coefficients (Fem::DiscreteFunctionInterface< DFImpl > &coeffs)
	Compute the basis representation, which means: do the assembling stuff.
Access to data members
GlobalCoordinateType &	x0 ()
const GlobalCoordinateType &	x0 () const
unsigned &	component ()
const unsigned &	component () const

Detailed Description

template<class DiscreteFunctionSpace>
class Dune::ACFem::DiracDistribution< DiscreteFunctionSpace >

Dirac-distribution.

Note that this is not a functional in H1, unless you live in a one-dimensional world (where functional means as usual: linear and continuous). For continuous spaces this implementation makes use of the Fem::EnitySearch to find an element were the support (the global coordinate) of the Dirac-distribution is located in. For discontinuous spaces this is not enough if the point resides in special position, therefor simply every element is checked. This means this is rather inefficient for discontinuous FEM spaces.

Parameters

[in]

DiscreteFunctionSpace

The discrete function model the distribution acts aon.

Note

The current implementation produces a class which is quite costly to copy. Consequently, don't try to inject a temporary instance of this class into expression templates.

Constructor & Destructor Documentation

DiracDistribution()

template<class DiscreteFunctionSpace >

Dune::ACFem::DiracDistribution< DiscreteFunctionSpace >::DiracDistribution ( const DiscreteFunctionSpaceType &  space, const GlobalCoordinateType &  x0, unsigned  component = 0  )

inline

Constructor.

Construct a Dirac distribution for the given discrete space and given point.

Parameters

[in]	space	Discrete function space we operate on.
[in]	x0	"Support" of the Dirac measure
[in]	component	For vector valued problems gives the component to generate. To fit into the DiscreteLinearFunctional frame-work this Dirac distribution has to evaluate to a scalar property.

Member Function Documentation

operator()()

RangeType Dune::ACFem::DiscreteLinearFunctionalDefault< DiscreteFunctionSpace, DiracDistributionTraits< DiscreteFunctionSpace > >::operator() ( const Fem::DiscreteFunctionInterface< DFTraits > &  arg ) const

inlineinherited

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

• dune/acfem/operators/functionals/diracfunctional.hh