画矢量图形，并能做简单的变形：如拖拽，旋转，放大缩小等。-Drawing vector graphics, and can do a simple deformation: such as drag and drop, rotate, zoom and so on.

flex实现的画bezier曲线的方法，可以根据鼠标移动自动刷新-flex draw bezier curve to achieve the method can automatically refresh mouse