Add a cluster of points in one corner and watch that corner subdivide deeply while the rest of the space stays untouched. Then scatter a few points across the empty region and watch it split only where needed. The tree grows around the data.
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很多人不喜欢用手机原相机拍照，总觉得它拍出来的照片太无聊，色彩平淡且数码感强烈，这是计算摄影诟病已久的问题。但其实各大手机厂商这两年都在悄悄改变，藏在原相机深处的功能，有不少可以挖掘的宝藏。