PK_ERROR_code_t       PK_CIRCLE_ask
(
--- received arguments ---
PK_CIRCLE_t           circle,       --- circle

--- returned arguments ---
PK_CIRCLE_sf_t *const circle_sf     --- circle standard form
)


This function writes the standard form of a circle at the given address.  The
application is responsible for allocating the standard form, but need not
initialise any of the fields.  See documentation for PK_CIRCLE_sf_t.