使用OpenGL画3D图形的简单例子，通过此代码可以很直接的学习画3D图形，用中文注释-3D graphics using OpenGL drawing of a simple example, the passage of this code can be very straightforward to learn painting 3D graphics, use of Chinese Notes

使用树莓派驱动ADXL345 显示欧拉角/OPENGL 3D建模控制 历史曲线等(Use raspberry pie to drive ADXL345 to display Euler angle/OPENGL 3D modeling control history curve, etc.)