openscenegraph3.4.0，主要是一款开源的图形渲染引擎，主要是OPENGL的基础上进行封装，可以利用它实现三维场景的渲染。-openscenegraph3.4.0, mainly is an open source graphics rendering engine, OPENGL is mainly carried out on the basis of the package, you can use it to achieve a three-dimensional scen