ForceDiagram.halfedge_face

ForceDiagram.halfedge_face(u, v)

Find the face corresponding to a halfedge.

Parameters:

• u (int) – The identifier of the first vertex.

• v (int) – The identifier of the second vertex.

Returns:

int | None – The identifier of the face corresponding to the halfedge. None, if the halfedge is on the outside of a boundary.

Raises:

KeyError – If the halfedge does not exist.