Real game engines use this pattern (or its 3D cousin, the Octree) for broad-phase collision detection: the quadtree quickly identifies candidate pairs, and a more expensive narrow-phase check tests the actual geometry.
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Flight controllers at Nasa working out how to get the crippled Apollo 13 back to Earth.，更多细节参见谷歌浏览器【最新下载地址】
This story continues at The Next Web。关于这个话题，体育直播提供了深入分析