Merge branch 'main' of git.gangary.cn:gary/maze_python
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205
mazeTest.py
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205
mazeTest.py
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import json
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import importlib.util
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import os
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from collections import deque
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import itertools
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# 从JSON文件中读取迷宫
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def read_maze(file_path):
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with open(file_path, 'r') as file:
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data = json.load(file)
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return data['maze']
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# 广度优先搜索函数
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def bfs(maze, start, end=None):
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rows, cols = len(maze), len(maze[0])
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directions = [(0, 1), (1, 0), (0, -1), (-1, 0)]
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visited = [[False] * cols for _ in range(rows)]
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visited[start[0]][start[1]] = True
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queue = deque([(start, [start])])
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paths = []
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while queue:
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(x, y), path = queue.popleft()
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if end and (x, y) == end:
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paths.append(path)
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continue
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for dx, dy in directions:
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new_x, new_y = x + dx, y + dy
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if 0 <= new_x < rows and 0 <= new_y < cols and maze[new_x][new_y] != '#' and not visited[new_x][new_y]:
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visited[new_x][new_y] = True
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new_path = path + [(new_x, new_y)]
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queue.append(((new_x, new_y), new_path))
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return paths, visited
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# 使用DFS检测迷宫中是否存在环
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def detect_cycle(maze):
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rows, cols = len(maze), len(maze[0])
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directions = [(0, 1), (1, 0), (0, -1), (-1, 0)]
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visited = [[False] * cols for _ in range(rows)]
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parent = {} # 记录每个节点的父节点
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cycles = [] # 存储找到的环
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def dfs(x, y, parent_pos=None):
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visited[x][y] = True
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current_pos = (x, y)
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parent[current_pos] = parent_pos
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for dx, dy in directions:
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new_x, new_y = x + dx, y + dy
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new_pos = (new_x, new_y)
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# 检查是否在迷宫范围内且是通道
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if 0 <= new_x < rows and 0 <= new_y < cols and maze[new_x][new_y] != '#':
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if not visited[new_x][new_y]:
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if dfs(new_x, new_y, current_pos):
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return True
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# 如果邻居已访问且不是父节点，则找到环
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elif parent_pos != new_pos:
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# 重建环路径
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cycle = [current_pos]
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back_pos = current_pos
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while back_pos != new_pos:
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back_pos = parent[back_pos]
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if back_pos is None: # 防止意外情况
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break
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cycle.append(back_pos)
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cycle.append(new_pos)
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cycles.append(cycle)
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return True
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return False
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# 从每个未访问的通道开始DFS
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for i in range(rows):
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for j in range(cols):
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if maze[i][j] != '#' and not visited[i][j]:
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if dfs(i, j):
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return True, cycles
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return False, cycles
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# 判断两点间是否有唯一通路
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def has_unique_path(maze, start, end):
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paths, _ = bfs(maze, start, end)
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if not paths: # 如果没有路径，则不存在唯一通路
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return False
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return len(paths) == 1
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# 检查迷宫中任意两点间是否都是唯一通路
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def check_all_pairs_unique_paths(maze, passages):
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# 首先检测迷宫中是否存在环
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has_cycle, cycles = detect_cycle(maze)
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if has_cycle:
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# 如果存在环，则必定存在不唯一的通路
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return False, 0, len(list(itertools.combinations(passages, 2))), cycles
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else:
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# 如果不存在环，则所有点对之间都是唯一通路
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total_pairs = len(list(itertools.combinations(passages, 2)))
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return True, total_pairs, total_pairs, []
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# 找到起点和终点的坐标以及所有可通行的格子
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def find_start_end_and_passages(maze):
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start = None
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end = None
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passages = []
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for i in range(len(maze)):
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for j in range(len(maze[0])):
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cell = maze[i][j]
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if cell == 'S':
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start = (i, j)
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passages.append((i, j))
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elif cell == 'E':
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end = (i, j)
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passages.append((i, j))
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elif cell != '#': # 非墙壁即为通道
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passages.append((i, j))
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return start, end, passages
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# 检测迷宫中的孤立区域
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def find_isolated_areas(maze, start):
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rows, cols = len(maze), len(maze[0])
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# 从起点开始BFS，标记所有可达的格子
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_, visited_from_start = bfs(maze, start)
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# 查找所有非墙壁但不可达的格子
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isolated_areas = []
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for i in range(rows):
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for j in range(cols):
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if maze[i][j] != '#' and not visited_from_start[i][j]:
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isolated_areas.append((i, j))
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return isolated_areas
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# 检查终点是否可达
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def is_end_reachable(maze, start, end):
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paths, _ = bfs(maze, start, end)
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return len(paths) > 0
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# 主函数
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def main(file_path):
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maze = read_maze(file_path)
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start, end, passages = find_start_end_and_passages(maze)
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if start and end:
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# 检查终点是否可达
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end_reachable = is_end_reachable(maze, start, end)
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if not end_reachable:
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print("终点不可达！")
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else:
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# 检查是否有唯一通路
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unique_path = has_unique_path(maze, start, end)
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print(f"迷宫中从起点到终点是否有唯一通路: {unique_path}")
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# 检查是否有孤立区域
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isolated_areas = find_isolated_areas(maze, start)
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if isolated_areas:
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# 检查终点是否在孤立区域中
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end_isolated = end in isolated_areas
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if end_isolated:
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print(f"终点 {end} 不可从起点到达！")
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# 移除终点，只显示其他孤立区域
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isolated_areas.remove(end)
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if isolated_areas: # 如果还有其他孤立区域
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print(f"迷宫中存在孤立区域，共有 {len(isolated_areas)} 个格子不可达:")
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for i, area in enumerate(isolated_areas[:5]): # 只显示前5个孤立格子
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print(f" - 孤立格子 {i+1}: 坐标 {area}, 内容: {maze[area[0]][area[1]]}")
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if len(isolated_areas) > 5:
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print(f" ... 以及其他 {len(isolated_areas) - 5} 个孤立格子")
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else:
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print("除了终点外，迷宫中不存在其他孤立区域。")
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else:
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print("迷宫中不存在孤立区域，所有非墙壁格子都可以从起点到达。")
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# 检查迷宫中是否存在环，从而判断任意两点间是否都是唯一通路
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all_unique, unique_count, total_count, cycles = check_all_pairs_unique_paths(maze, passages)
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if all_unique:
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print(f"迷宫中不存在环，所有点对之间都有唯一通路，共有 {total_count} 对点。")
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else:
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print(f"迷宫中存在环，因此并非所有点对之间都有唯一通路。")
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if cycles:
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print(f"发现的环路径示例:")
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for i, cycle in enumerate(cycles[:3]):
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print(f" - 环 {i+1}: {' -> '.join(str(pos) for pos in cycle)}")
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if len(cycles) > 3:
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print(f" ... 以及其他 {len(cycles) - 3} 个环")
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else:
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print("未找到起点或终点。")
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if __name__ == "__main__":
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for i in os.listdir("saves"):
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if i.endswith(".json"):
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file_path = os.path.join("saves", i)
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print(f"正在处理文件: {file_path}")
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main(file_path)
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print("\n" + "="*50 + "\n")
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