MeshData

class dolfin.cpp.mesh.MeshData

Bases: dolfin.cpp.common.Variable

The class MeshData is a container for auxiliary mesh data, represented either as arrays or maps. Each dataset is identified by a unique user-specified string. Only std::size_t-valued data are currently supported.

Auxiliary mesh data may be attached to a mesh by users as a convenient way to store data associated with a mesh. It is also used internally by DOLFIN to communicate data associated with meshes. The following named mesh data are recognized by DOLFIN:

Facet orientation (used for assembly over interior facets)

• “facet_orientation” - _std:vector_ <std::size_t> of dimension D - 1

Sub meshes (used by the class SubMesh)

• “parent_vertex_indices” - _std::vector_ <std::size_t> of dimension 0

Note to developers: use underscore in names in place of spaces.

Constructor

array()

Overloaded versions

• array(name, dim)

  Return array with given name (returning zero if data is not available)

  Arguments

  name (str)

  The name of the array.

  Returns

  numpy.array(int)

  The array.

• array(name, dim)

  Return array with given name (returning zero if data is not available)

  Arguments

  name (str)

  The name of the array.

  Returns

  numpy.array(int)

  The array.

clear()

Clear all data

create_array()

Create array (vector) with given name and size

Arguments

name (str)

The name of the array.

size (int)

The size (length) of the array.

Returns

numpy.array(int)

The array.

erase_array()

Erase array with given name

Arguments

name (str)

The name of the array.

exists()

Check is array exists

Arguments

name (str)

The name of the array.

Returns

bool

True is array exists, false otherwise.

thisown None

The membership flag