贝赛尔曲线的拆分是指将贝赛尔曲线分解成逼近的多边形。可以用来判断贝赛尔曲线的选中，以及显示贝赛尔曲线的旋转效果等。 -Split of the Bezier curve is a Bezier curve refers to the decomposition of the approximation polygon. Can be used to determine the Bezier curve is selected, and display rotation effects of th