这是关于计算机图形学方面的内容，这些代码可以做出普通的一些基本图形，比如：直线，圆，圆弧，而且还可以用不同的颜色来填充图形-This is about the contents of the computer graphics, the code can make ordinary some basic graphics, for example: the straight line, round, arc, and still can use different color is to fil