mesh.Mesh.border_mesh#

Mesh.border_mesh(compact=True)#

Return a Mesh representing the border.

Parameters#

compact: bool: If True (default), the returned Mesh will be compacted. If False, the returned Mesh will contain all the nodes present in the input Mesh.

Returns#

Mesh: A Mesh containing the border of the input Mesh. The level of the Mesh is one less than that of the input Mesh. If the input Mesh has property numbers, the border elements inherit the property of the element to which they belong.

Notes#

This is a convenient shorthand for

self.get_free_entities_mesh(level=-1,compact=compact)

Element fields (type=’elem’) are propagated from the parent elements to the corresponding border elements. This is intended primarily for rendering or visualization purposes.

Important

The mapping of element fields may not always make sense. For example, if the original element field represents the volume of a hex8 element, the corresponding quad4 border elements do not have a volume.

Examples#

>>> M = Mesh(eltype='quad4')
>>> print(M.border_mesh())
Mesh: n_nodes: 4, n_elems: 4, plexitude: 2, level: 1, eltype: line2
  BBox: [0. 0. 0.], [1. 1. 0.]
  Size: [1. 1. 0.]
  Length: 4.0