应用贝泽尔函数，用于优化曲线，是曲线平滑。 输入是原曲线上的一组点； 输出是优化后曲线上的一组点(The Bezel function is used to optimize the curve, and the curve is smooth. Input is a set of points on the original curve, and output is a set of points on the curve after optimization.)