铅笔的旋转与灯光的设置，材质设置，鼠标响应-very good

O p e n G L是图形硬件的一个软件接口。这份资料 看起来 比较容易上手，适应初学着。-O pen GL is a software interface to graphics hardware. This information seems relatively easy to use, adapt to beginners with.

OpenGL 绘图 橡皮筋, VB opengl教程（挺好的，难得哦）-OpenGL pen