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| （未显示同一用户的6个中间版本） |
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| 代码备份如下
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| == 机械动力动力合成器矩阵周期最小化.ipynb ==
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| === 调包 ===
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| <pre>import numpy as np
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| import matplotlib.pyplot as plt
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| from collections import deque</pre>
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|
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| === 函数定义 ===
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| <pre>def bfs_depth(grid, ini_pos):
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|
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| <nowiki>'''</nowiki>
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| grid: 2d np array, only 0, 1
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| ini_pos: 2-len python int list, position vec [a,b]
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| returns the depth 2d array
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| <nowiki>'''</nowiki>
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|
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| if not grid.size:
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| return np.array([], dtype=int).reshape(0, 0)
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|
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| # 初始化访问数组并全部填充为-1
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| visited = np.full_like(grid, -1, dtype=int)
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| temp = ini_pos.copy()
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| temp.append(0)
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|
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| # 起始点
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| queue = deque([tuple(temp)]) # (row, col, depth)
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|
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| # 定义四个方向的移动
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| directions = [(0, 1), (1, 0), (0, -1), (-1, 0)]
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|
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| while queue:
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| row, col, depth = queue.popleft()
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| # 如果当前点不是障碍物（假设0表示障碍物），则更新访问数组
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| if grid[row, col] != 0:
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| visited[row, col] = depth
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| # 检查相邻的点
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| for dx, dy in directions:
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| new_row, new_col = row + dx, col + dy
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| # 如果相邻点在网格内且未被访问
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| if 0 <= new_row < grid.shape[0] and 0 <= new_col < grid.shape[1] and visited[new_row, new_col] == -1:
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| queue.append((new_row, new_col, depth + 1))
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| return visited
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| def edge_detector(grid):
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| row, col = grid.shape[0], grid.shape[1]
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| ava_out_pos_list = []
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| directions = [(0, 1), (1, 0), (0, -1), (-1, 0)]
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| for i in range(row):
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| for j in range(col):
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| if grid[i,j]==1:
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| if i==0 or i==row-1 or j==0 or j==col-1:
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| ava_out_pos_list.append([i,j])
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| else:
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| exist_0 = False
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| for dx, dy in directions:
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| new_row, new_col = i + dx, j + dy
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| if grid[new_row, new_col] == 0:
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| exist_0 = True
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| break
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| if exist_0 :
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| ava_out_pos_list.append([i,j])
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| return ava_out_pos_list</pre>
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|
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| === 参数定义 ===
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| <pre>crafter_array = np.array([[0,0,0,0,1,0,0,0,0],
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| [0,0,0,1,1,1,0,0,0],
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| [1,1,1,1,1,1,1,1,1],
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| [1,1,1,1,1,1,1,1,1],
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| [0,1,1,1,1,1,1,1,0],
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| [0,0,1,1,1,1,1,0,0],
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| [0,1,1,1,1,1,1,1,0],
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| [1,1,1,1,0,1,1,1,1],
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| [1,1,1,0,0,0,1,1,1]
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| ])</pre>
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|
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| === 运行1：最优结果绘制 ===
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| <pre>ava_start = edge_detector(crafter_array)
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| cur_minimum_steps = np.inf
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| result = None
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| start = None
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| edge_result = np.ones((crafter_array.shape[0],crafter_array.shape[1]))
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| edge_result = edge_result*-1
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| for start_pos in ava_start:
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| arr = bfs_depth(crafter_array,start_pos)
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| temp_step = np.max(arr)
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| edge_result[start_pos[0],start_pos[1]] = temp_step
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| if temp_step < cur_minimum_steps:
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| cur_minimum_steps = temp_step
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| result = arr
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| start = start_pos
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| print('minimum steps =',cur_minimum_steps,'and start at ',start)
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| print(result)
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| plt.figure()
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| plt.imshow(result, cmap='viridis', aspect='auto')
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| plt.colorbar()
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| plt.title('crafter depth matrix')
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| plt.xlabel('X')
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| plt.ylabel('Y')
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| plt.show()</pre>
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|
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| === 运行2：边缘结果绘制 ===
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| <pre>print(edge_result)
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| plt.figure()
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| plt.imshow(edge_result, cmap='viridis', aspect='auto')
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| plt.colorbar()
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| plt.title('all output step matrix')
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| plt.xlabel('X')
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| plt.ylabel('Y')
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| plt.show()</pre>
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