MeshEntity.h¶

Note

The documentation on this page was automatically extracted from the DOLFIN C++ code and may need to be edited or expanded.

class MeshEntity¶

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

MeshEntity()¶: Default Constructor

MeshEntity(const Mesh &mesh, std::size_t dim, std::size_t index)¶

Constructor

Arguments

mesh (Mesh): The mesh.
dim (std::size_t): The topological dimension.
index (std::size_t): The index.

void init(const Mesh &mesh, std::size_t dim, std::size_t index)¶

Initialize mesh entity with given data

Arguments

mesh (Mesh): The mesh.
dim (std::size_t): The topological dimension.
index (std::size_t): The index.

bool operator==(const MeshEntity &e) const¶

Comparison Operator

Arguments

another (MeshEntity): Another mesh entity

Returns

bool: True if the two mesh entities are equal.

bool operator!=(const MeshEntity &e) const¶

Comparison Operator

Arguments

another (MeshEntity): Another mesh entity.

Returns

bool: True if the two mesh entities are NOT equal.

const Mesh &mesh() const¶

Return mesh associated with mesh entity

Returns

Mesh: The mesh.

std::size_t dim() const¶

Return topological dimension

Returns

std::size_t: The dimension.

std::size_t index() const¶

Return index of mesh entity

Returns

std::size_t: The index.

std::int64_t global_index() const¶

Return global index of mesh entity

Returns

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

std::size_t num_entities(std::size_t dim) const¶

Return local number of incident mesh entities of given topological dimension

Arguments

dim (std::size_t): The topological dimension.

Returns

std::size_t

The number of local incident MeshEntity objects of given dimension.

std::size_t num_global_entities(std::size_t dim) const¶

Return global number of incident mesh entities of given topological dimension

Arguments

dim (std::size_t): The topological dimension.

Returns

std::size_t: The number of global incident MeshEntity objects of given dimension.

const unsigned int *entities(std::size_t dim) const¶

Return array of indices for incident mesh entities of given topological dimension

Arguments

dim (std::size_t): The topological dimension.

Returns

std::size_t: The index for incident mesh entities of given dimension.

std::size_t mesh_id() const¶

Return unique mesh ID

Returns

std::size_t: The unique mesh ID.

bool incident(const MeshEntity &entity) const¶

Check if given entity is incident

Arguments

entity (MeshEntity): The entity.

Returns

bool: True if the given entity is incident

std::size_t index(const MeshEntity &entity) const¶

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

Arguments

entity (MeshEntity): The mesh entity.

Returns

std::size_t: The local index of given entity.

Point midpoint() const¶

Compute midpoint of cell

Returns

Point: The midpoint of the cell.

bool is_ghost() const¶: Determine whether an entity is a ‘ghost’ from another process

std::set<unsigned int> sharing_processes() const¶: Return set of sharing processes

bool is_shared() const¶: Determine if an entity is shared or not

unsigned int owner() const¶: Get ownership of this entity - only really valid for cells

std::string str(bool verbose) const¶

Return informal string representation (pretty-print)

Arguments

verbose (bool): Flag to turn on additional output.

Returns

std::string: An informal representation of the function space.