Dune::PDELab::WeightedMatrixAccumulationView< C > Class Template Reference

An accumulate-only view on a local matrix that automatically takes into account an accumulation weight. More...

#include <dune/pdelab/gridoperator/common/localmatrix.hh>

Public Types
typedef C	Container
	The type of the underlying container.
typedef Container::BaseContainer	BaseContainer
	The type of the storage container underlying the LocalVector. More...
typedef C::value_type	value_type
	The value type of the entries.
typedef C::weight_type	weight_type
	The type of the weight applied when accumulating contributions.
typedef WeightedMatrixAccumulationView	WeightedAccumulationView
	Export this type for uniform handling of the containers themselves and their views.
typedef C::size_type	size_type
	The size_type of the underlying container.

Public Member Functions
WeightedAccumulationView	weightedAccumulationView (weight_type weight)
	Returns a WeighedAccumulationView with some weight in addition to this view's weight.
weight_type	weight () const
	Returns the weight associated with this view. More...
void	setWeight (weight_type weight)
	Resets the weighting coefficient of the view. More...
template<typename LFSU , typename LFSV >
void	accumulate (const LFSV &lfsv, size_type i, const LFSU &lfsu, size_type j, value_type v)
	Applies the current weight to v and adds the result to the matrix entry associated with the i-th entry of lfsv and the j-th entry of lfsu.
template<typename LFSU , typename LFSV >
void	rawAccumulate (const LFSV &lfsv, size_type i, const LFSU &lfsu, size_type j, value_type v)
	Adds v to the (i,j)-th entry of the underlying container without applying the current weight. More...
size_type	nrows () const
	Returns the number of rows of the underlying container.
size_type	ncols () const
	Returns the number of colums of the underlying container.
bool	modified () const
	Returns whether this view has been written to.
void	resetModified ()
	Resets the modification state of the view to not modified. More...
Container &	container ()
	Returns the container (of type LocalMatrix) that this view is based on.
const Container &	container () const
	Returns the container (of type LocalMatrix) that this view is based on (const version).
BaseContainer &	base ()
	Returns the storage container of the underlying LocalMatrix. More...
const BaseContainer &	base () const
	Returns the storage container of the underlying LocalVector (const version). More...
	WeightedMatrixAccumulationView (Container &container, weight_type weight)
	Constructor.

Detailed Description

template<typename C>
class Dune::PDELab::WeightedMatrixAccumulationView< C >

An accumulate-only view on a local matrix that automatically takes into account an accumulation weight.

Member Typedef Documentation

BaseContainer

template<typename C >

typedef Container::BaseContainer Dune::PDELab::WeightedMatrixAccumulationView< C >::BaseContainer

The type of the storage container underlying the LocalVector.

Warning

This is not a matrix-like container anymore, but a std::vector-like one!

Member Function Documentation

base() [1/2]

template<typename C >

BaseContainer& Dune::PDELab::WeightedMatrixAccumulationView< C >::base ( )

inline

Returns the storage container of the underlying LocalMatrix.

Warning

This is not a matrix-like container anymore, but a std::vector-like one!

base() [2/2]

template<typename C >

const BaseContainer& Dune::PDELab::WeightedMatrixAccumulationView< C >::base ( ) const

inline

Returns the storage container of the underlying LocalVector (const version).

Warning

This is not a matrix-like container anymore, but a std::vector-like one!

rawAccumulate()

template<typename C >

template<typename LFSU , typename LFSV >

void Dune::PDELab::WeightedMatrixAccumulationView< C >::rawAccumulate ( const LFSV &  lfsv, size_type  i, const LFSU &  lfsu, size_type  j, value_type  v  )

inline

Adds v to the (i,j)-th entry of the underlying container without applying the current weight.

Warning

When using this method, you must take care of applying the weight yourself, otherwise your program may exhibit strange behavior or even calculate wrong results!

resetModified()

template<typename C >

void Dune::PDELab::WeightedMatrixAccumulationView< C >::resetModified ( )

inline

Resets the modification state of the view to not modified.

Warning

Never call this method from within a local operator, or your local residual / matrix contributions will be lost!

setWeight()

template<typename C >

void Dune::PDELab::WeightedMatrixAccumulationView< C >::setWeight ( weight_type  weight )

inline

Resets the weighting coefficient of the view.

Warning

Only call this method when you know what you are doing! It is especially not meant to be called from inside local operators.

References Dune::PDELab::WeightedMatrixAccumulationView< C >::weight().

weight()

template<typename C >

weight_type Dune::PDELab::WeightedMatrixAccumulationView< C >::weight ( ) const

inline

Returns the weight associated with this view.

Note

This can be used together with rawAccumulate() to avoid applying the weight at each loop iteration.

Referenced by Dune::PDELab::WeightedMatrixAccumulationView< C >::setWeight(), and Dune::PDELab::WeightedMatrixAccumulationView< C >::weightedAccumulationView().

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

• dune/pdelab/gridoperator/common/localmatrix.hh