很好的一个OSG的案例适合初学者学习，里边是用几何体组成的立体几何-this is a very good example of osg

此程序案例，利用vs2013工具进行开发，适合初学OSG的人使用，添加了阴影效果，添加了视图等，并且可以添加风雪等特效。(This program case is developed by vs2013 tool, which is suitable for people who learn OSG, add shadow effect, add views and so on, and add special effects such

OSG 学习过程案例代码，主要关于osgearth的(OSG learning process case code, mainly about osgearth)