一个3D图形显示系统，封装了一些OPenGL函数，可以实现任意形状拉伸，直管，弯管等-A 3D graphics display system, a number of packages OPenGL function, can achieve tensile arbitrary shape, straight pipes, elbows, etc.

通用动画显示程序:建立一个通用的含有时间函数的程序,改变三维世界中的物体的形状-Universal animated program: the establishment of a common procedure that contains a function of time to change the three-dimensional shape of the object in the world of

用OpenGL实现的中点画圆算法，同时实现了窗口重画不改变圆的形状的功能。-OpenGL implementation of the midpoint circle algorithm, while achieving a window redraw does not change the round shape of the function.

自定义函数 根据两个控制点以及对应斜率 画出Hermite曲线 并由方向键控制形状大小-Hermite curve by the arrow keys to control the shape and size of a custom function to draw the two control points and the corresponding slope