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.
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We explore the strange food-obsessed world of a new game whose tech was once called ‘an insult to life itself’ by Hayao Miyazaki, the film-maker behind Spirited Away。业内人士推荐Line官方版本下载作为进阶阅读
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