MeshFunctionSizet

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

Bases: dolfin.cpp.common.Variable, dolfin.cpp.mesh.HierarchicalMeshFunctionSizet

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.

Overloaded versions

• MeshFunction()

  Create empty mesh function

• MeshFunction(mesh)

  Create empty mesh function on given mesh

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

• MeshFunction(mesh)

  Create empty mesh function on given mesh (shared_ptr version)

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

• MeshFunction(mesh, dim)

  Create mesh function of given dimension on given mesh

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  dim (int)

  The mesh entity dimension for the mesh function.

• MeshFunction(mesh, dim)

  Create mesh function of given dimension on given mesh (shared_ptr version)

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  dim (int)

  The mesh entity dimension for the mesh function.

• MeshFunction(mesh, dim, 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 (int)

  The mesh entity dimension.

  value (T)

  The value.

• MeshFunction(mesh, dim, value)

  Create mesh of given dimension on given mesh and initialize to a value (shared_ptr version)

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  dim (int)

  The mesh entity dimension.

  value (T)

  The value.

• MeshFunction(mesh, filename)

  Create function from data file

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  filename (str)

  The filename to create mesh function from.

• MeshFunction(mesh, filename)

  Create function from data file (shared_ptr version)

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  filename (str)

  The filename to create mesh function from.

• MeshFunction(mesh, value_collection)

  Create function from a MeshValueCollecion

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  value_collection (MeshValueCollection)

  The mesh value collection for the mesh function data.

• MeshFunction(mesh, value_collection)

  Create function from a MeshValueCollecion (shared_ptr version)

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  value_collection (MeshValueCollection)

  The mesh value collection for the mesh function data.

• MeshFunction(mesh, dim, domains)

  Create function from MeshDomains

  Arguments

  mesh (Mesh)

  The mesh to create mesh function on.

  dim (int)

  The dimension of the MeshFunction

  domains (MeshDomains)

  The domains from which to extract the domain markers

• MeshFunction(f)

  Copy constructor

  Arguments

  f (MeshFunction)

  The object to be copied.

array()

Return a NumPy array view of the data

dim()

Return topological dimension

Returns

int

The dimension.

empty()

Return true if empty

Returns

bool

True if empty.

init()

Overloaded versions

• init(dim)

  Initialize mesh function for given topological dimension

  Arguments

  dim (int)

  The dimension.

• init(dim, size)

  Initialize mesh function for given topological dimension of given size

  Arguments

  dim (int)

  The dimension.

  size (int)

  The size.

• init(mesh, dim)

  Initialize mesh function for given topological dimension

  Arguments

  mesh (Mesh)

  The mesh.

  dim (int)

  The dimension.

• init(mesh, dim)

  Initialize mesh function for given topological dimension (shared_ptr version)

  Arguments

  mesh (Mesh)

  The mesh.

  dim (int)

  The dimension.

• init(mesh, dim, size)

  Initialize mesh function for given topological dimension of given size

  Arguments

  mesh (Mesh)

  The mesh.

  dim (int)

  The dimension.

  size (int)

  The size.

• init(mesh, dim, size)

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

  Arguments

  mesh (Mesh)

  The mesh.

  dim (int)

  The dimension.

  size (int)

  The size.

mesh()

Return mesh associated with mesh function

Returns

Mesh

The mesh.

set_all()

Set all values to given value

Arguments

value (T)

The value to set all values to.

set_value()

Overloaded versions

• set_value(index, value)

  Set value at given index

  Arguments

  index (int)

  The index.

  value (T)

  The value.

• set_value(index, value, mesh)

  Compatibility function for use in SubDomains

set_values()

Set values

Arguments

values (std::vector<T>)

The values.

size()

Return size (number of entities)

Returns

int

The size.

thisown None

The membership flag

ufl_id()

Returns an id that UFL can use to decide if two objects are the same.