学习OSG的入门级代码，分别在windows下用VS2003和在linux下实现，包含光照、结点查找、纹理映射等多个小例子，是初学者入门的好材料。-osg entry-level learning code, respectively, under the windows and in linux use vs2003 to achieve, including light, node search, texture mapping, and other small example is a g