ElementDofLayout Class Reference

The class represents the degree-of-freedom (dofs) for an element. Dofs are associated with a mesh entity. This class also handles sub-space dofs, which are views into the parent dofs. More...

#include <ElementDofLayout.h>

Public Member Functions
	ElementDofLayout (int block_size, const std::vector< std::vector< std::vector< int > > > &entity_dofs, const std::vector< std::vector< std::vector< int > > > &entity_closure_dofs, const std::vector< int > &parent_map, const std::vector< ElementDofLayout > &sub_layouts)
	Constructor.
ElementDofLayout	copy () const
	Copy the DOF layout, discarding any parent information.
	ElementDofLayout (const ElementDofLayout &dofmap)=default
	Copy constructor.
	ElementDofLayout (ElementDofLayout &&dofmap)=default
	Move constructor.
	~ElementDofLayout ()=default
	Destructor.
ElementDofLayout &	operator= (const ElementDofLayout &dofmap)=default
	Copy assignment.
ElementDofLayout &	operator= (ElementDofLayout &&dofmap)=default
	Move assignment.
bool	operator== (const ElementDofLayout &layout) const
	Equality operator.
int	num_dofs () const
	Return the dimension of the local finite element function space on a cell (number of dofs on element)
int	num_entity_dofs (int dim) const
	Return the number of dofs for a given entity dimension.
int	num_entity_closure_dofs (int dim) const
	Return the number of closure dofs for a given entity dimension.
const std::vector< int > &	entity_dofs (int dim, int entity_index) const
	Local-local mapping of dofs on entity of cell.
const std::vector< int > &	entity_closure_dofs (int dim, int entity_index) const
	Local-local closure dofs on entity of cell.
const std::vector< std::vector< std::vector< int > > > &	entity_dofs_all () const
	Direct access to all entity dofs (dof = _entity_dofs[dim][entity][i])
const std::vector< std::vector< std::vector< int > > > &	entity_closure_dofs_all () const
	Direct access to all entity closure dofs (dof = _entity_dofs[dim][entity][i])
int	num_sub_dofmaps () const
	Get number of sub-dofmaps.
const ElementDofLayout &	sub_layout (std::span< const int > component) const
	Get sub-dofmap given by list of components, one for each level.
std::vector< int >	sub_view (std::span< const int > component) const
	Get view for a sub-layout, defined by the component list (as for sub_layour()), into this dofmap. I.e., the dofs in this dofmap that are the sub-dofs.
int	block_size () const
	Block size.
bool	is_view () const
	True iff dof map is a view into another map.

Detailed Description

The class represents the degree-of-freedom (dofs) for an element. Dofs are associated with a mesh entity. This class also handles sub-space dofs, which are views into the parent dofs.

Constructor & Destructor Documentation

ElementDofLayout()

ElementDofLayout	(	int	block_size,
		const std::vector< std::vector< std::vector< int > > > &	entity_dofs,
		const std::vector< std::vector< std::vector< int > > > &	entity_closure_dofs,
		const std::vector< int > &	parent_map,
		const std::vector< ElementDofLayout > &	sub_layouts
	)

Constructor.

Parameters

[in]	block_size	The number of dofs co-located at each point.
[in]	entity_dofs	The dofs on each entity, in the format: entity_dofs[entity_dim][entity_number] = [dof0, dof1, ...]
[in]	entity_closure_dofs	The dofs on the closure of each entity, in the format: entity_closure_dofs[entity_dim][entity_number] = [dof0, dof1, ...]
[in]	parent_map	TODO
[in]	sub_layouts	(std::vector<ElementDofLayout>)TODO

Member Function Documentation

entity_closure_dofs()

const std::vector< int > & entity_closure_dofs	(	int	dim,
		int	entity_index
	)		const

Local-local closure dofs on entity of cell.

Parameters

[in]	dim	The entity dimension
[in]	entity_index	The local entity index on the cell

Returns

Cell-local degree-of-freedom indices

entity_dofs()

const std::vector< int > & entity_dofs	(	int	dim,
		int	entity_index
	)		const

Local-local mapping of dofs on entity of cell.

Parameters

[in]	dim	The entity dimension
[in]	entity_index	The local entity index on the cell

Returns

Cell-local degree-of-freedom indices

is_view()

bool is_view

(

)

const

True iff dof map is a view into another map.

Returns

bool True if the dof map is a sub-dof map (a view into another map).

num_dofs()

int num_dofs

(

)

const

Return the dimension of the local finite element function space on a cell (number of dofs on element)

Returns

Dimension of the local finite element function space.

num_entity_closure_dofs()

int num_entity_closure_dofs

(

int

dim

)

const

Return the number of closure dofs for a given entity dimension.

Parameters

[in]

dim

Entity dimension

Returns

Number of dofs associated with closure of given entity dimension

num_entity_dofs()

int num_entity_dofs

(

int

dim

)

const

Return the number of dofs for a given entity dimension.

Parameters

[in]

dim

Entity dimension

Returns

Number of dofs associated with given entity dimension

operator==()

bool operator==

(

const ElementDofLayout &

layout

)

const

Equality operator.

Returns

Returns true if the layout data is the same. Sub- and parent dofmap data is not compared.

Note

The block sizes of the layouts are not compared

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

• /__w/dolfinx/dolfinx/cpp/dolfinx/fem/ElementDofLayout.h
• /__w/dolfinx/dolfinx/cpp/dolfinx/fem/ElementDofLayout.cpp