用python解决迷宫 [英] Maze solving with python

问题描述

我正在尝试制作一个迷宫求解器，但它正在运行，除了要用>"，<"，"v"，"^"标记而不是用"o"标记路径"，具体取决于路径的方向.这是解决迷宫的代码部分:

I am trying to make a maze solver, and it is working except that instead of the path being marked by "o" I want it to be marked with ">", "<", "v", "^" depending on the direction of the path. This is the part of the code where it solves the maze:

 def solve(self,x,y):
    maze = self.maze

    #Base case  
    if y > len(maze) or x > len(maze[y]):
        return False

    if maze[y][x] == "E":
        return True 

    if  maze[y][x] != " ":
        return False


    #marking
    maze[y][x] = "o"        

    #recursive case
    if self.solve(x+1,y) == True :  #right
        return True
    if self.solve(x,y+1) == True :  #down
        return True     
    if self.solve(x-1,y) == True :  #left
        return True     
    if self.solve(x,y-1) == True :  #up
        return True     

    #Backtracking
    maze[y][x] = " "
    return False    

这是一个未解决的迷宫的例子:

This is an example of an unsolved maze:

####################################
#S#  ##  ######## # #      #     # #
# #   #             # #        #   #
#   # ##### ## ###### # #######  # #
### # ##    ##      # # #     #### #
#   #    #  #######   #   ###    #E#
####################################

这是使用上面的代码的相同迷宫的已解决版本:

And this is the solved version of the same maze using the code above:

####################################
#S#  ##  ######## # #oooooo#  ooo# #
#o#ooo#    oooo     #o#   ooooo#ooo#
#ooo#o#####o##o######o# #######  #o#
### #o##oooo##oooooo#o# #     ####o#
#   #oooo#  #######ooo#   ###    #E#
####################################

我想要得到的结果是:

####################################
#S#  ##  ######## # #>>>>>v#  ^>v# #
#v#^>v#    >>>v     #^#   >>>>^#>>v#
#>>^#v#####^##v######^# #######  #v#
### #v##^>>^##>>>>>v#^# #     ####v#
#   #>>>^#  #######>>^#   ###    #E#
####################################

这怎么可能?

推荐答案

#marking
maze[y][x] = "o"        

#recursive case
if self.solve(x+1,y) == True :  #right
    maze[y][x] = ">"
    return True
if self.solve(x,y+1) == True :  #down
    maze[y][x] = "v"
    return True
...

以Lix为例.您需要取消注释maze [y] [x] ="o"，需要该行以防止再次访问该节点

From Lix example. You need to uncomment maze[y][x] = "o", you need that row to prevent the node from being revisited

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