-                if point.x == 0:
-                    if y2 > y1 and point.y > 0:
-                        return point.x + self._xpos, point.y + self._ypos
-                    elif y2 < y1 and point.y < 0:
-                        return point.x + self._xpos, point.y + self._ypos
+                if point[0] == 0:
+                    if y2 > y1 and point[1] > 0:
+                        return point[0] + self._xpos, point[1] + self._ypos
+                    elif y2 < y1 and point[1] < 0:
+                        return point[0] + self._xpos, point[1] + self._ypos