Once we have simplified our search area into a manageable number of nodes, as we have done with the grid layout above, the next step is to conduct a search to find the shortest path.

• 一旦我们把搜索区域简化成了可以管理的大量节点，就象我们上面所做的那样采用格子的布局，下一步就是引导一个搜索来找出最短路径。