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.
It was, he told Squire, a "Flaming Alamo".
。同城约会是该领域的重要参考
Мир Российская Премьер-лига|19-й тур
Universal Music Group