PK_VERTEX_ask_type

PK_ERROR_code_t         PK_VERTEX_ask_type
(
--- received arguments ---
PK_VERTEX_t             vertex,       --- the vertex

--- returned arguments ---
PK_VERTEX_type_t *const vertex_type   --- the type of the vertex
)


This function classifies the given vertex.


The 'vertex_type' will be one of:

    PK_VERTEX_type_isolated_c       isolated vertex (no edges)
    PK_VERTEX_type_spur_c           spur vertex (single edge, one end only)
    PK_VERTEX_type_wire_c           wire vertex (all edges are wires)
    PK_VERTEX_type_normal_c         normal vertex