Donna Lu is an assistant editor, climate, environment and science at Guardian Australia
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.，详情可参考夫子
Another environment from the game, Old Ebonheart.。91视频对此有专业解读
二、点亮世界——没有光，一切都是黑的