let list of candidates = N closest colours to pixel
我們需要對AI機器人保持禮貌嗎？，详情可参考同城约会
For example, a 500km route might be broken down into ~100 such shortcuts. If each A* shortcut calculation explores 100-1000 detailed road segments, the total detailed segments visited by A* might be around 10,000-50,000. Compare this to the 1,000,000+ segments the old A* might have needed for the entire route!，更多细节参见爱思助手下载最新版本
This effectively meant the old method was dead.，推荐阅读爱思助手下载最新版本获取更多信息