MeshEntity

class dolfin.cpp.mesh.MeshEntity(*args)

Bases: object

A MeshEntity represents a mesh entity associated with a specific topological dimension of some Mesh.

Overloaded versions

• MeshEntity()

  Default Constructor

• MeshEntity(mesh, dim, index)

  Constructor

  Arguments

  mesh (Mesh)

  The mesh.

  dim (int)

  The topological dimension.

  index (int)

  The index.

dim()

Return topological dimension

Returns

int

The dimension.

entities(dim)

Return number of incident mesh entities of given topological dimension

global_index()

Return global index of mesh entity

Returns

int

The global index. Set to std::numerical_limits<std::size_t>::max() if global index has not been computed

incident()

Check if given entity is incident

Arguments

entity (MeshEntity)

The entity.

Returns

bool

True if the given entity is incident

index()

Overloaded versions

• index()

  Return index of mesh entity

  Returns

  int

  The index.

• index(entity)

  Compute local index of given incident entity (error if not found)

  Arguments

  entity (MeshEntity)

  The mesh entity.

  Returns

  int

  The local index of given entity.

init()

Initialize mesh entity with given data

Arguments

mesh (Mesh)

The mesh.

dim (int)

The topological dimension.

index (int)

The index.

is_ghost()

Determine whether an entity is a ‘ghost’ from another process

is_shared()

Determine if an entity is shared or not

mesh()

Return mesh associated with mesh entity

Returns

Mesh

The mesh.

mesh_id()

Return unique mesh ID

Returns

int

The unique mesh ID.

midpoint()

Compute midpoint of cell

Returns

Point

The midpoint of the cell.

num_entities()

Return local number of incident mesh entities of given topological dimension

Arguments

dim (int)

The topological dimension.

Returns

int

The number of local incident MeshEntity objects of given dimension.

num_global_entities()

Return global number of incident mesh entities of given topological dimension

Arguments

dim (int)

The topological dimension.

Returns

int

The number of global incident MeshEntity objects of given dimension.

owner()

Get ownership of this entity - only really valid for cells

sharing_processes()

Return set of sharing processes

str()

Return informal string representation (pretty-print)

Arguments

verbose (bool)

Flag to turn on additional output.

Returns

str

An informal representation of the function space.

thisown

The membership flag