The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.
Valve是一家总部位于华盛顿州贝尔维尤的游戏开发商，其知名游戏系列包括《反恐精英》《军团要塞》和《Dota》等。根据周三在曼哈顿州法院提交的诉状，詹姆斯认为Valve的战利品箱系统属于“典型的赌博行为”，违反了纽约州宪法和刑法。
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