Area Clusters: The map is intelligently segmented into numerous small regions or clusters.
Что думаешь? Оцени!，详情可参考同城约会
A deeper debt hole。旺商聊官方下载是该领域的重要参考
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.
The Linear Combination