bezier曲线的说明，用matlab实现-bezier curve shows that to achieve with matlab

用户交互输入若干控制点后，自动生成由这些控制点决定的准均匀三次B样条曲线。要求同时显示每段Bezier曲线的控制多边形。-The user interactive input after a certain number of control points, automatically generated is decided by the control points of quasi uniform B spline curve three times. Also show the Bezi