A quadtree reduces this: rebuild the tree each frame, and for each object, query only the nearby region. Objects in distant quadrants are never compared.
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，详情可参考同城约会
I could definitely be reading too much into a six-second social video, but Cook's X post looks to me like the back of a MacBook. The video also shows a person manipulating the Apple logo with their fingers, which, to me, screams "touchscreen."
主干道被乱停的车辆堵得水泄不通，路边散落着蔫掉的菜叶和塑料垃圾，地面上散布着不少干涸的痰迹。街道的脏乱仿佛成了一种默许，违停与垃圾不再被视为问题。鸣笛声此起彼伏，人们谈论的多是家长里短，而非“头上的星空与心中的道德律”。在这样的环境里，我们也不自觉地爱上议论是非、拆解他人。