应用osg实现的lod显示，编程环境是vc++2008，osg2.8.2-Application osg achieved lod show programming environment is vc++2008, osg2.8.2

OSG中通过LOD节点来实现多细节层次显示，此处用了2个不同的图像来举例，实际应该是同一图形的不同细分图-OSG through the LOD node to achieve multi-level level display, here with two different images for example, the actual should be the same graphics of different subdivision