PK_ERROR_code_t     PK_BODY_ask_vertices
(
--- received arguments ---
PK_BODY_t           body,           --- a body

--- returned arguments ---
int          *const n_vertices,     --- number of vertices (>= 0)
PK_VERTEX_t **const vertices        --- vertices (optional)
)


This function returns the set of vertices in the given body.


The output array vertices is optional. If it is set to NULL, the function
will only compute the number of vertices in the body.