这是我写的一个矢量图形变换的简单程序。程序输入几何图形的边数，然后依次各顶点的坐标。然后进入菜单。Open打开输入图形，Move用来移动，GBP绕中间点旋转90度-This is the one I wrote Vector Graphics transform the simple procedure. The importation procedures edge geometry, to be followed by the coordinates of the vertices. The