程序使用了Bresenham算法的思想，将四个象限的问题通过交换端点的方法合并成一，四象限的问题。再利用sign变量，统一成一个问题。又考虑到斜率<1，>1最终问题分成了两种情况。在直线插补程序的一开始，把斜率为正无穷的情况单独进行讨论。最终完成了整个程序-procedures for the use of the Bresenham algorithm thinking, four quadrant of the issue through the exchange of endp

这是在codeproject下的老外的代码，没有工程文件（dsw、dsp），但有demo演示。对输入的函数（如log(x)，sign(cos(x))）都能在直角坐标系上画出相应的图，还有表达式分解的过程，很强大。-This is a foreigner under the codeproject code, there is no project files (dsw, dsp), but demo demo. A function of the input (such as log (x),

三维openGL场景，具有点线面符号算法，三维公路铁路-3D openGL scene, with Point, Line and sign algorithm, three-dimensional highway and railway

is a project for my bachelors in computer science, where i used the 3D animation to depict the sign language of MSL.