PK_ERROR_code_t  PK_LOOP_ask_next_in_face
(
--- received arguments ---
PK_LOOP_t        loop,             --- a loop

--- returned arguments ---
PK_LOOP_t *const next              --- the next loop (possibly PK_ENTITY_null)
)


This function returns the next loop in the face containing the given loop.


This function should be used in conjunction with PK_FACE_ask_first_loop to
scan the loops in a face, one at a time, in the same order as returned by
PK_FACE_ask_loops. If the loop is the last in the face, PK_ENTITY_null will
be returned.