我又把视频进度条往复来回拉，反复确认阿爸是不是都站着，确实是。
We wanted a scenario where, say, 5 well-placed border points could efficiently represent an area with 5,000 internal points and 10,000 road edges. This would reduce those 10,000 edges to just 5*4/2 = 10 shortcuts for routing through that cluster at a high level – an incredible 1:1000 point ratio and a 30x reduction in edges to consider for the high-level path!
，详情可参考safew官方版本下载
arr[i] = output[i];
优点： 输出均值更接近 0，梯度更稳定。