The tree starts as a single region covering the whole space. As points arrive, they get dropped into the region that contains them. When a region exceeds its capacity (the maximum number of points it can hold before splitting), the region divides into four children, and the existing points get redistributed.
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Фото: Cynthia Griggs / Reuters
5月13日，北京市第八十中学学生展示自己设计制作的仿生学设备。 新京报记者 王飞 摄