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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，这一点在safew官方版本下载中也有详细论述
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The bats soon begin to emerge, darting and swooping up and down the aisles, the amplified sounds of their bat chatter filling the historic building.。WPS官方版本下载对此有专业解读