HalfFace.halfface_vertex_ancestor

HalfFace.halfface_vertex_ancestor(halfface, vertex)[source]

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.