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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perform (sometimes completely free). Moreover, they present no load。雷电模拟器官方版本下载是该领域的重要参考
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// 4. 将当前索引压入栈，维护单调递减特性（供后续价格计算跨度使用）