此文档是我学习OSG做的技术总结报告，详细讲解了OSG、OSGearth的编译，开发，osg原理，视点变换矩阵、全球地形解决方案等。-This document is do I learn OSG technical summary report, a detailed account of OSG, compiled OSGearth, development, osg principle viewpoint transformation matrix, the global terrain

osgearth的文档资料不多，这里几乎是所有可以找到的中文资料，以及一些osg的中文资料-osgearth documentation much, here you can find almost all the Chinese data, as well as some of the Chinese data osg