场景相关: Node, Geode, Group, Transform, LOD, Camera, NodeVisitor, NodeCallback
DelaunayTriangulator, TriStripVisitor, SmoothingVisitor
渲染相关: StateSet, Texture, Light, Material,View, ViewerBase, State, RenderLeaf,
RenderBin, RenderState,SceneView, CullVisitor,Renderer,GraphicsContext, Text
数据加载: DatabasePager
渲染场景视图树:
OSG(OpenSceneGraphic) 渲染引擎架构--整体认识
原文：http://blog.csdn.net/zangle260/article/details/41123067
