On the other hand, if the G cost of the new path is lower, change the parent of the adjacent square to the selected square (in the diagram above, change the direction of the pointer to point at the selected square).
On the other hand, if the G cost of the new path is lower, change the parent of the adjacent square to the selected square (in the diagram above, change the direction of the pointer to point at the selected square).
相反，如果新路径的G值更小，把这个相邻方块的父亲改为当前选定的方块（在上图中，修改其指针方向指向选定方块）。