Regions with many nearby points keep subdividing. Regions with few or no points stay large. The tree adapts to the data: dense areas get fine-grained cells, sparse areas stay coarse. The split grid is predetermined (always at midpoints), but the tree only refines cells that need it. Sparse regions stay as single large nodes while dense regions subdivide deeply.
这和市面上那些防窥膜的实现方式是几乎相同的，区别在于技术路径。。im钱包官方下载是该领域的重要参考
With her hands steady at the controls, her voice calm as she spoke to mission control, Collins piloted the craft through a slow, graceful somersault. With the shuttle's underside now visible, the damage was quickly spotted - and a spacewalk was carried out to repair it.，推荐阅读heLLoword翻译官方下载获取更多信息
Objects have a class, and a fixed size based on their class.，更多细节参见同城约会