法国数学家贝塞尔发明了矢量作图法，所以把用矢量作出的图形叫做贝塞尔曲线" ,画贝塞尔曲线的函数:生成界面上有三个按钮，Add**Move,为左键增加点，右键拖动点；Move**Add,为右键增加点，左键拖动点；Clear为清楚界面上所有的点和曲线！-French mathematician invented the Bessel vector mapping method, so to make use of vector graphics, called Bezier curves , dr