Print points based on 4 - way symmetry
print ( " ( " , x + xc , " , " , y + yc , " ) " ) ; NEW_LINE print ( " ( " , - x + xc , " , " , y + yc , " ) " ) ; NEW_LINE print ( " ( " , x + xc , " , " , - y + yc , " ) " ) ; NEW_LINE print ( " ( " , - x + xc , " , " , - y + yc , " ) " ) ; NEW_LINE