一个计算机图形学的vc++程序示例.调用画点的函数，用DDA、中点算法画直线和中点算法画圆和椭圆 多边形扫描转换算法和区域填充算法实现-A computer graphics vc++ program examples. Call draw point function with DDA, the midpoint algorithm and the midpoint algorithm to draw lines circle and ellipse polygon scan convers