Question

嘿那里，我正在构建一个生成迷宫的程序，以便稍后将路径转换为我的图形部分。我大部分都在工作，但是，每次你可以走东西路线，你就会走到尽头。即使我将宽度设置为64，因此迷宫为64 * 64，我可以选择这两个选项并且每次都到达终点。我真的不明白为什么这样做。代码如下，它很容易理解。

import random

width = 8

def check(x,y):
    """Figures out the directions that Gen can move while"""
    if x-1 == -1:
        maze[x][y][3] = 0 

    if x+1 == width + 1:
        maze[x][y][1] = 0

    if y+1 == width + 1:
        maze[x][y][2] = 0

    if y-1 == -1:
        maze[x][y][0] = 0

    if x + 1 in range(0,width) and visited[x+1][y] == False:
        maze[x][y][1] = 2

    if x - 1 in range(0,width) and visited[x-1][y] == False:
        maze[x][y][3] = 2

    if y + 1 in range(0,width) and visited[x][y+1] == False:
        maze[x][y][2] = 2

    if y - 1 in range(0,width) and visited[x][y-1] == False:
        maze[x][y][0] = 2

def possibleDirs(x,y):
    """Figures out the ways that the person can move in each square"""
    dirs = []
    walls = maze[x][y]

    if walls[0] == 1:
        dirs.append('n')
    if walls[1] == 1:
        dirs.append('e')
    if walls[2] == 1:
        dirs.append('s')
    if walls[3] == 1:
        dirs.append('w')

    return dirs


def Gen(x,y):
    """Generates the maze using a depth-first search and recursive backtracking."""
    visited[x][y] = True
    dirs = []
    check(x,y)

    if maze[x][y][0] == 2:
        dirs.append(0)
    if maze[x][y][1] == 2:
        dirs.append(1)
    if maze[x][y][2] == 2:
        dirs.append(2)
    if maze[x][y][3] == 2:
        dirs.append(3)
    print dirs

    if len(dirs):
        #Randonly selects a derection for the current square to move
        past.append(current[:])
        pos = random.choice(dirs)

        maze[x][y][pos] = 1  

        if pos == 0:
            current[1] -= 1
            maze[x][y-1][2] = 1
        if pos == 1:
            current[0] += 1
            maze[x+1][y][3] = 1
        if pos == 2:
            current[1] += 1
            maze[x][y+1][0] = 1
        if pos == 3:
            current[0] -= 1
            maze[x-1][y][1] = 1

    else:
        #If there's nowhere to go, go back one square
        lastPlace = past.pop()
        current[0] = lastPlace[0]
        current[1] = lastPlace[1]



#Build the initial values for the maze to be replaced later
maze = []
visited = []
past = []

#Generate empty 2d list with a value for each of the xy coordinates
for i in range(0,width):
    maze.append([])
    for q in range(0, width):
        maze[i].append([])
        for n in range(0, 4):
            maze[i][q].append(4)

#Makes a list of falses for all the non visited places
for x in range(0, width):
    visited.append([])
    for y in range(0, width):
        visited[x].append(False)

dirs = []
print dirs

current = [0,0]

#Generates the maze so every single square has been filled. I'm not sure how this works, as it is possible to only go south and east to get to the final position.
while current != [width-1, width-1]:
    Gen(current[0], current[1])
#Getting the ways the person can move in each square
for i in range(0,width):
    dirs.append([])
    for n in range(0,width):
        dirs[i].append([])
        dirs[i][n] = possibleDirs(i,n)

print dirs
print visited

pos = [0,0]

#The user input part of the maze
while pos != [width - 1, width - 1]:
    dirs = []
    print pos
    if maze[pos[0]][pos[1]][0] == 1:
        dirs.append('n')
    if maze[pos[0]][pos[1]][1] == 1:
        dirs.append('e')
    if maze[pos[0]][pos[1]][2] == 1:
        dirs.append('s')
    if maze[pos[0]][pos[1]][3] == 1:
        dirs.append('w')
    print dirs
    path = raw_input("What direction do you want to go: ")
    if path not in dirs:
        print "You can't go that way!"
        continue
    elif path.lower() == 'n':
        pos[1] -= 1        
    elif path.lower() == 'e':
        pos[0] += 1   
    elif path.lower() == 's':
        pos[1] += 1
    elif path.lower() == 'w':
        pos[0] -= 1

print"Good job!"

正如你所看到的，我认为这个问题是在我产生迷宫的时候，然而，当我只是把它带到当前点结束时，它并没有填满每一个迷宫而且通常只是一条直路。谢谢你的帮助。

更新：我已经将生成迷宫的for循环更改为一个简单的while循环，它似乎工作得更好。似乎当for循环运行时，它没有递归，但是，在while循环中它完全没问题。但是，现在所有的方块都没有填写。

Answer 1

您使用的是迭代方法，而不是像代码状态那样的递归方法！

查看这一系列关于迷宫生成的伟大文章（从递归回溯开始）：

http://weblog.jamisbuck.org/2010/12/27/maze-generation-recursive-backtracking

Answer 2

你有一个迭代迷宫生成器，而不是一个递归的回溯迷宫生成器。 Gen目前的形式不是递归的;这是迭代的。你为每个瓷砖调用一次;如果你检查一步，问题应该很明显。

迷宫不是随意的

2 个答案: