INDEX
1．基础 ........................................................................................................................... 4
1.1 什么是场景图.................................................................................................... 4
1.2 第二个问题：谁关心场景图？ ........................................................................... 5
1.3 一些与OSG相关的问题 ..................................................................................... 5
1.4 超级指针和OSG ................................................................................................ 6
2．两个3D Viewer .......................................................................................................... 10
2.1 一个最简单的viewer ....................................................................................... 10
2.2 另一个简单的（可能有BUG）的3D Viewer ...................................................... 12
3．进入StateSets ........................................................................................................... 15
3.1 OpenGL-状态机................................................................................................ 15
3.2 OSG和OpenGL状态 ........................................................................................ 16
3.3 一个简单的（无BUG）3D Viewer ..................................................................... 16
