A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
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“请分析上述代码的执行流程，输出一段标准的 Mermaid sequenceDiagram 代码。不要解释，只输出代码块。”。关于这个话题，im钱包官方下载提供了深入分析
Producer: Ben Ellman，详情可参考搜狗输入法下载