Check Circle Data

local xc, yc, rad

get_circle_data iref, ics, rad, xc, yc

if (xc - rad) < xmin then xmin = (xc - rad)

if (yc - rad) < ymin then ymin = (yc - rad)

if (xc + rad) > xmax then xmax = (xc + rad)

if (yc + rad) > ymax then ymax = (yc + rad)