PK_ERROR_code_t   PK_FACE_ask_loops
(
--- received arguments ---
PK_FACE_t         face,            --- a face

--- returned arguments ---
int        *const n_loops,         --- number of loops (>= 0)
PK_LOOP_t **const loops            --- loops (optional)
)


This function returns the set of loops bounding the given face.


The outer loop on the perimeter of the face (where this is meaningful) is not
distinguished.

The output array loops is optional. If it is set to NULL, then the function
will only compute the number of loops bounding the face.