本程序实现了计算机图形学的一些典型算法，如中点画线，中点画圆，Bresenham画线，Bresenham画圆，Bezier曲线，B样条曲线，区域填充-This program implements a typical computer graphics algorithms, such as the dotted line, the midpoint Circle, Bresenham line drawing, Bresenham circle, Bezier curves, B-spline