正八面体的图形解析，清楚直观的观察正八面体，算法易实现，适合初学图形学的同志研究。-Octahedral graph analysis, clear and intuitive observation is octahedral, the algorithm easy to implement, the comrades of graphics for beginners.

Opencv 学习资料，基本上全了，除了各章节的示例代码，还有相关的ppt slides，解析的非常清楚-Opencv learning materials, basically full, in addition to the sample code for each chapter, there ppt slides very clearly resolved