HalfFace.halfface_vertex_ancestor

HalfFace.halfface_vertex_ancestor(halfface, vertex)

Return the vertex before the specified vertex in a specific face.

Parameters

• halfface (int) – The identifier of the halfface.

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

Returns

int – The identifier of the vertex before the given vertex in the face cycle.

Raises

ValueError – If the vertex is not part of the face.