FESubfaceValues< dim, spacedim > Class Template Reference

#include <deal.II/fe/fe.h>

Inheritance diagram for FESubfaceValues< dim, spacedim >:

Public Member Functions
	FESubfaceValues (const Mapping< dim, spacedim > &mapping, const FiniteElement< dim, spacedim > &fe, const Quadrature< dim - 1 > &face_quadrature, const UpdateFlags update_flags)
	FESubfaceValues (const FiniteElement< dim, spacedim > &fe, const Quadrature< dim - 1 > &face_quadrature, const UpdateFlags update_flags)
template<template< int, int > class DoFHandlerType, bool level_dof_access>
void	reinit (const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, level_dof_access >> &cell, const unsigned int face_no, const unsigned int subface_no)
template<template< int, int > class DoFHandlerType, bool level_dof_access>
void	reinit (const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, level_dof_access >> &cell, const typename Triangulation< dim, spacedim >::face_iterator &face, const typename Triangulation< dim, spacedim >::face_iterator &subface)
void	reinit (const typename Triangulation< dim, spacedim >::cell_iterator &cell, const unsigned int face_no, const unsigned int subface_no)
void	reinit (const typename Triangulation< dim, spacedim >::cell_iterator &cell, const typename Triangulation< dim, spacedim >::face_iterator &face, const typename Triangulation< dim, spacedim >::face_iterator &subface)
const FESubfaceValues< dim, spacedim > &	get_present_fe_values () const
template<template< int, int > class DoFHandlerType, bool lda>
void	reinit (const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, lda >> &cell, const unsigned int face_no, const unsigned int subface_no)
template<template< int, int > class DoFHandlerType, bool lda>
void	reinit (const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, lda >> &cell, const typename Triangulation< dim, spacedim >::face_iterator &face, const typename Triangulation< dim, spacedim >::face_iterator &subface)

Static Public Member Functions
static ::ExceptionBase &	ExcReinitCalledWithBoundaryFace ()
static ::ExceptionBase &	ExcFaceHasNoSubfaces ()

Static Public Attributes
static const unsigned int	dimension = dim
static const unsigned int	space_dimension = spacedim
static const unsigned int	integral_dimension = dim - 1

Private Member Functions
void	initialize (const UpdateFlags update_flags)
void	do_reinit (const unsigned int face_no, const unsigned int subface_no)

Detailed Description

template<int dim, int spacedim = dim>
class FESubfaceValues< dim, spacedim >

Finite element evaluated in quadrature points on a face.

This class adds the functionality of FEFaceValuesBase to FEValues; see there for more documentation.

This class is used for faces lying on a refinement edge. In this case, the neighboring cell is refined. To be able to compute differences between interior and exterior function values, the refinement of the neighboring cell must be simulated on this cell. This is achieved by applying a quadrature rule that simulates the refinement. The resulting data fields are split up to reflect the refinement structure of the neighbor: a subface number corresponds to the number of the child of the neighboring face.

Author

Wolfgang Bangerth, 1998, Guido Kanschat, 2000, 2001

Definition at line 42 of file fe.h.

Constructor & Destructor Documentation

FESubfaceValues() [1/2]

template<int dim, int spacedim>

FESubfaceValues< dim, spacedim >::FESubfaceValues	(	const Mapping< dim, spacedim > &	mapping,
		const FiniteElement< dim, spacedim > &	fe,
		const Quadrature< dim - 1 > &	face_quadrature,
		const UpdateFlags	update_flags
	)

Constructor. Gets cell independent data from mapping and finite element objects, matching the quadrature rule and update flags.

Definition at line 4856 of file fe_values.cc.

FESubfaceValues() [2/2]

template<int dim, int spacedim>

FESubfaceValues< dim, spacedim >::FESubfaceValues	(	const FiniteElement< dim, spacedim > &	fe,
		const Quadrature< dim - 1 > &	face_quadrature,
		const UpdateFlags	update_flags
	)

Constructor. This constructor is equivalent to the other one except that it makes the object use a \(Q_1\) mapping (i.e., an object of type MappingQGeneric(1)) implicitly.

Definition at line 4874 of file fe_values.cc.

Member Function Documentation

reinit() [1/6]

template<int dim, int spacedim = dim>

template<template< int, int > class DoFHandlerType, bool level_dof_access>

void FESubfaceValues< dim, spacedim >::reinit	(	const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, level_dof_access >> &	cell,
		const unsigned int	face_no,
		const unsigned int	subface_no
	)

Reinitialize the gradients, Jacobi determinants, etc for the given cell of type "iterator into a DoFHandler object", and the finite element associated with this object. It is assumed that the finite element used by the given cell is also the one used by this FESubfaceValues object.

reinit() [2/6]

template<int dim, int spacedim = dim>

template<template< int, int > class DoFHandlerType, bool level_dof_access>

void FESubfaceValues< dim, spacedim >::reinit	(	const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, level_dof_access >> &	cell,
		const typename Triangulation< dim, spacedim >::face_iterator &	face,
		const typename Triangulation< dim, spacedim >::face_iterator &	subface
	)

Alternative reinitialization function that takes, as arguments, iterators to the face and subface instead of their numbers.

reinit() [3/6]

template<int dim, int spacedim>

void FESubfaceValues< dim, spacedim >::reinit	(	const typename Triangulation< dim, spacedim >::cell_iterator &	cell,
		const unsigned int	face_no,
		const unsigned int	subface_no
	)

Reinitialize the gradients, Jacobi determinants, etc for the given subface on a given cell of type "iterator into a Triangulation object", and the given finite element. Since iterators into a triangulation alone only convey information about the geometry of a cell, but not about degrees of freedom possibly associated with this cell, you will not be able to call some functions of this class if they need information about degrees of freedom. These functions are, above all, the get_function_value/gradients/hessians/third_derivatives functions. If you want to call these functions, you have to call the reinit variants that take iterators into DoFHandler or other DoF handler type objects.

Definition at line 5003 of file fe_values.cc.

reinit() [4/6]

template<int dim, int spacedim>

void FESubfaceValues< dim, spacedim >::reinit	(	const typename Triangulation< dim, spacedim >::cell_iterator &	cell,
		const typename Triangulation< dim, spacedim >::face_iterator &	face,
		const typename Triangulation< dim, spacedim >::face_iterator &	subface
	)

Reinitialize the gradients, Jacobi determinants, etc for the given subface on a given cell of type "iterator into a Triangulation object", and the given finite element. Since iterators into a triangulation alone only convey information about the geometry of a cell, but not about degrees of freedom possibly associated with this cell, you will not be able to call some functions of this class if they need information about degrees of freedom. These functions are, above all, the get_function_value/gradients/hessians/third_derivatives functions. If you want to call these functions, you have to call the reinit variants that take iterators into DoFHandler or other DoF handler type objects.

This does the same thing as the previous function but takes iterators instead of numbers as arguments.

Note

face and subface must correspond to a face (and a subface of that face) of cell.

Definition at line 5035 of file fe_values.cc.

get_present_fe_values()

template<int dim, int spacedim = dim>

const FESubfaceValues<dim, spacedim>& FESubfaceValues< dim, spacedim >::get_present_fe_values

(

)

const

Return a reference to this very object.

Though it seems that it is not very useful, this function is there to provide capability to the hp::FEValues class, in which case it provides the FEValues object for the present cell (remember that for hp finite elements, the actual FE object used may change from cell to cell, so we also need different FEValues objects for different cells; once you reinitialize the hp::FEValues object for a specific cell, it retrieves the FEValues object for the FE on that cell and returns it through a function of the same name as this one; this function here therefore only provides the same interface so that one can templatize on FEValues and hp::FEValues).

initialize()

template<int dim, int spacedim>

void FESubfaceValues< dim, spacedim >::initialize ( const UpdateFlags  update_flags )

private

Do work common to the two constructors.

Definition at line 4892 of file fe_values.cc.

do_reinit()

template<int dim, int spacedim>

void FESubfaceValues< dim, spacedim >::do_reinit ( const unsigned int  face_no, const unsigned int  subface_no  )

private

The reinit() functions do only that part of the work that requires knowledge of the type of iterator. After setting present_cell(), they pass on to this function, which does the real work, and which is independent of the actual type of the cell iterator.

Definition at line 5049 of file fe_values.cc.

reinit() [5/6]

template<int dim, int spacedim = dim>

template<template< int, int > class DoFHandlerType, bool lda>

void FESubfaceValues< dim, spacedim >::reinit	(	const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, lda >> &	cell,
		const unsigned int	face_no,
		const unsigned int	subface_no
	)

Definition at line 4941 of file fe_values.cc.

reinit() [6/6]

template<int dim, int spacedim = dim>

template<template< int, int > class DoFHandlerType, bool lda>

void FESubfaceValues< dim, spacedim >::reinit	(	const TriaIterator< DoFCellAccessor< DoFHandlerType< dim, spacedim >, lda >> &	cell,
		const typename Triangulation< dim, spacedim >::face_iterator &	face,
		const typename Triangulation< dim, spacedim >::face_iterator &	subface
	)

Definition at line 4989 of file fe_values.cc.

Member Data Documentation

dimension

template<int dim, int spacedim>

const unsigned int FESubfaceValues< dim, spacedim >::dimension = dim

static

Dimension in which this object operates.

Definition at line 3984 of file fe_values.h.

space_dimension

template<int dim, int spacedim = dim>

const unsigned int FESubfaceValues< dim, spacedim >::space_dimension = spacedim

static

Dimension of the space in which this object operates.

Definition at line 3989 of file fe_values.h.

integral_dimension

template<int dim, int spacedim>

const unsigned int FESubfaceValues< dim, spacedim >::integral_dimension = dim - 1

static

Dimension of the object over which we integrate. For the present class, this is equal to dim-1.

Definition at line 3995 of file fe_values.h.

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

• include/deal.II/fe/fe.h
• include/deal.II/fe/fe_values.h
• source/fe/fe_values.cc