该代码用了VTK中的鼠标去点方式在三维体上进行取点，非常易于操作，要进行三维人机交互的朋友可以，下载下来学习。-VTK The code used to point the mouse in the three-dimensional body on the access points, very easy to operate, three-dimensional human-computer interaction to be friends can download them to lea

OpenSceneGraph 源码分析 dragger 部分 pointinfo-OpenSceneGraph source code analysis dragger part pointinfo