MeshFunction.h¶

Note

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

class MeshFunction¶

Parent class(es)

Variable

A MeshFunction is a function that can be evaluated at a set of mesh entities. A MeshFunction is discrete and is only defined at the set of mesh entities of a fixed topological dimension. A MeshFunction may for example be used to store a global numbering scheme for the entities of a (parallel) mesh, marking sub domains or boolean markers for mesh refinement.

MeshFunction()¶: Create empty mesh function

explicit MeshFunction(std::shared_ptr<const Mesh> mesh)¶

Create empty mesh function on given mesh

Arguments

mesh (Mesh): The mesh to create mesh function on.

MeshFunction(std::shared_ptr<const Mesh> mesh, std::size_t dim)¶

Create mesh function of given dimension on given mesh

Arguments

mesh (Mesh): The mesh to create mesh function on.
dim (std::size_t): The mesh entity dimension for the mesh function.

MeshFunction(std::shared_ptr<const Mesh> mesh, std::size_t dim, const T &value)¶

Create mesh of given dimension on given mesh and initialize to a value

Arguments

mesh (Mesh): The mesh to create mesh function on.
dim (std::size_t): The mesh entity dimension.
value (T): The value.

MeshFunction(std::shared_ptr<const Mesh> mesh, const std::string filename)¶

Create function from data file (shared_ptr version)

Arguments

mesh (Mesh): The mesh to create mesh function on.
filename (std::string): The filename to create mesh function from.

MeshFunction(std::shared_ptr<const Mesh> mesh, const MeshValueCollection<T> &value_collection)¶

Create function from a MeshValueCollecion (shared_ptr version)

Arguments

mesh (Mesh): The mesh to create mesh function on.
value_collection (MeshValueCollection <T>): The mesh value collection for the mesh function data.

MeshFunction(std::shared_ptr<const Mesh> mesh, std::size_t dim, const MeshDomains &domains)¶

Create function from MeshDomains

Arguments

mesh (Mesh): The mesh to create mesh function on.
dim (std::size_t): The dimension of the MeshFunction
domains (_MeshDomains): The domains from which to extract the domain markers

MeshFunction(const MeshFunction<T> &f)¶

Copy constructor

Arguments

f (MeshFunction <T>): The object to be copied.

MeshFunction<T> &operator=(const MeshFunction<T> &f)¶

Assign mesh function to other mesh function Assignment operator

Arguments

f (MeshFunction <T>): A MeshFunction object to assign to another MeshFunction.

MeshFunction<T> &operator=(const MeshValueCollection<T> &mesh)¶

Assignment operator

Arguments

mesh (MeshValueCollection): A MeshValueCollection object used to construct a MeshFunction.

std::shared_ptr<const Mesh> mesh() const¶

Return mesh associated with mesh function

Returns

Mesh: The mesh.

std::size_t dim() const¶

Return topological dimension

Returns

std::size_t: The dimension.

bool empty() const¶

Return true if empty

Returns

bool: True if empty.

std::size_t size() const¶

Return size (number of entities)

Returns

std::size_t: The size.

const T *values() const¶

Return array of values (const. version)

Returns

T: The values.

T *values()¶

Return array of values

Returns

T: The values.

T &operator[](const MeshEntity &entity)¶

Return value at given mesh entity

Arguments

entity (MeshEntity): The mesh entity.

Returns

T: The value at the given entity.

const T &operator[](const MeshEntity &entity) const¶

Return value at given mesh entity (const version)

Arguments

entity (MeshEntity): The mesh entity.

Returns

T: The value at the given entity.

T &operator[](std::size_t index)¶

Return value at given index

Arguments

index (std::size_t): The index.

Returns

T: The value at the given index.

const T &operator[](std::size_t index) const¶

Return value at given index (const version)

Arguments

index (std::size_t): The index.

Returns

T: The value at the given index.

const MeshFunction<T> &operator=(const T &value)¶: Set all values to given value

void init(std::size_t dim)¶

Initialize mesh function for given topological dimension

Arguments

dim (std::size_t): The dimension.

void init(std::size_t dim, std::size_t size)¶

Initialize mesh function for given topological dimension of given size

Arguments

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

void init(std::shared_ptr<const Mesh> mesh, std::size_t dim)¶

Initialize mesh function for given topological dimension

Arguments

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

void init(std::shared_ptr<const Mesh> mesh, std::size_t dim, std::size_t size)¶

Initialize mesh function for given topological dimension of given size (shared_ptr version)

Arguments

mesh (Mesh): The mesh.
dim (std::size_t): The dimension.
size (std::size_t): The size.

void set_value(std::size_t index, const T &value)¶

Set value at given index

Arguments

index (std::size_t): The index.
value (T): The value.

void set_value(std::size_t index, const T &value, const Mesh &mesh)¶: Compatibility function for use in SubDomains

void set_values(const std::vector<T> &values)¶

Set values

Arguments

values (std::vector<T>): The values.

void set_all(const T &value)¶

Set all values to given value

Arguments

value (T): The value to set all values to.

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.