在山西运城市平陆三湾大天鹅景区栖息的白天鹅。
The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.。Line官方版本下载是该领域的重要参考
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