Dune::Fem::LineSegmentSampler< GridPart > Class Template Reference

samples values of a discrete function along a given line segment More...

#include <dune/fem/misc/linesegmentsampler.hh>

Public Member Functions
	LineSegmentSampler (const GridPart &gridPart, const DomainType &left, const DomainType &right)
	constructor More...
template<class GridFunction >
void	operator() (const GridFunction &f, std::vector< typename GridFunction::RangeType > &samples, std::nothrow_t) const
	sample a given function More...
void	samplePoints (std::vector< DomainType > &points) const
	returns sampling points More...
const GridPart &	gridPart () const
	obtain grid part on which the LineSegmentSampler works

Detailed Description

template<class GridPart>
class Dune::Fem::LineSegmentSampler< GridPart >

samples values of a discrete function along a given line segment

The class LineSegmentSampler provides a method for sampling the values of given discrete function along an arbitrary line contained in some GridPart. The sampling points are always equidistant and include the line segment's end points.

Note

The grid is required to be flat, i.e., grid dimension and world dimension must coincide.

Template Parameters

GridPart

type of grid part to sample on

Constructor & Destructor Documentation

LineSegmentSampler()

template<class GridPart >

Dune::Fem::LineSegmentSampler< GridPart >::LineSegmentSampler ( const GridPart &  gridPart, const DomainType &  left, const DomainType &  right  )

inline

constructor

Parameters

[in]	gridPart	the grid part to sample over
[in]	left	left end point of the line segment
[in]	right	right end point of the line segment

Note

Actually, left and right can be exchanged. The order only influences the parametrization of the line segment.

The entire line segment must be a subset of the grid part.

Member Function Documentation

operator()()

template<class GridPart >

template<class GridFunction >

void Dune::Fem::LineSegmentSampler< GridPart >::operator() ( const GridFunction &  f, std::vector< typename GridFunction::RangeType > &  samples, std::nothrow_t    ) const

inline

sample a given function

The operator() actually samples the values of a given grid function.

Parameters

[in]	f	grid function to sample
[out]	samples	std::vector receiving the samples

Note

The number of sampling points is determined from the size of samples, which may not be less than 2.

References Dune::DenseVector< V >::axpy(), Dune::Geo::ReferenceElements< ctype_, dim >::general(), Dune::Hybrid::max, and Dune::Hybrid::min.

samplePoints()

template<class GridPart >

void Dune::Fem::LineSegmentSampler< GridPart >::samplePoints ( std::vector< DomainType > &  points ) const

inline

returns sampling points

The operator() actually samples the values of a given grid function.

Parameters

[out]

points

std::vector receiving the points

Note

The number of sampling points is determined from the size of points, which may not be less than 2.

References DUNE_THROW.

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

• dune/fem/misc/linesegmentsampler.hh