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// Helper to concatenate Uint8Arrays
，这一点在safew官方下载中也有详细论述
Presenter: Tom Whipple
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.
Флорида Пантерз