mesh.Mesh.border#

Mesh.border(return_indices=False)#

Return the border of the Mesh.

Border entities are the free entities of the first lower level.

Parameters#

return_indices: bool: If True, also returns an index array (nentities,2) for inverse lookup of the higher entity (column 0) and its local lower entity number (column 1).

Returns#

Elems: A connectivity table with the border entities of the specified level of the Mesh. Border entities are entities of one level lower that are only connected to a single element.

See Also#

get_free_entities(): return the free entities of any lower level
border_mesh(): return the border as a Mesh

Notes#

This is a convenient shorthand for

self.get_free_entities(level=-1,return_indices=return_indices)

Examples#

>>> M = Mesh(eltype='quad4')
>>> print(M.border())
[[0 1]
 [3 0]
 [1 2]
 [2 3]]