opengl入门，画图的各种步骤比较详细-opengl portal, drawing the various steps in more detail

opengl入门，画图的各种步骤比较详细-opengl portal, drawing the various steps in more detail

一个二维裁剪算法-用梁友栋－barsky算法实现直线段相对于给定窗口的裁剪-A two-dimensional cutting algorithm- with Liangyou Dong-barsky algorithm relative to a given straight line cut the window

用java编写的绘图程序，其中包括绘制直线，曲线，圆，矩形等基本功能，还实现了填充剪裁撤销等图形编辑功能。-Drawing program written by java, including drawing lines, curves, circles, rectangles and other basic functions, but also billed with cutting implements revocation gr