163 lines
6.4 KiB
Python
163 lines
6.4 KiB
Python
import random as rand
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def generate_grid(height: int, width: int, fill_percent: int = 70):
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"""
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Generates grid with a simple maze. Path is signed as 'p' and walls as 'w'. It always has walls surrounding it.
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:param height: height of the grid.
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:param width: width of the grid.
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:param fill_percent: percentage of walls in the maze (not counting surrounding walls).
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:return:
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"""
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grid = []
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for i in range(height):
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grid.append([])
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for j in range(width):
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grid[i].append('w')
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path_percent = (100. - float(fill_percent)) / 100.
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grid_size = float((height-2) * (width-2))
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paths_number = int(path_percent * grid_size)
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start_point_y = height // 2
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start_point_x = width // 2
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grid[start_point_y][start_point_x] = 'p'
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set_paths = 1
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path_list = [(start_point_y, start_point_x)]
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while set_paths < paths_number:
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chosen_position = rand.randint(0, len(path_list)-1)
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random_growth = rand.randint(0, 3)
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if random_growth == 0:
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if path_list[chosen_position][0]+1 == height-1:
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continue
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else:
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new_y = path_list[chosen_position][0] + 1
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new_x = path_list[chosen_position][1]
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if grid[new_y][new_x] == 'w':
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if grid[new_y][new_x-1] == 'p' or grid[new_y][new_x+1] == 'p' or grid[new_y+1][new_x] == 'p':
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if rand.randint(0, 100) < 1:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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else:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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elif random_growth == 1:
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if path_list[chosen_position][1]-1 == 0:
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continue
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else:
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new_y = path_list[chosen_position][0]
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new_x = path_list[chosen_position][1] - 1
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if grid[new_y][new_x] == 'w':
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if grid[new_y][new_x-1] == 'p' or grid[new_y-1][new_x] == 'p' or grid[new_y+1][new_x] == 'p':
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if rand.randint(0, 100) < 1:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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else:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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elif random_growth == 2:
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if path_list[chosen_position][0]-1 == 0:
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continue
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else:
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new_y = path_list[chosen_position][0]-1
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new_x = path_list[chosen_position][1]
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if grid[new_y][new_x] == 'w':
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if grid[new_y][new_x+1] == 'p' or grid[new_y][new_x-1] == 'p' or grid[new_y-1][new_x] == 'p':
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if rand.randint(0, 100) < 1:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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else:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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elif random_growth == 3:
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if path_list[chosen_position][1] + 1 == width-1:
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continue
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else:
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new_y = path_list[chosen_position][0]
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new_x = path_list[chosen_position][1] + 1
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if grid[new_y][new_x] == 'w':
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if grid[new_y][new_x+1] == 'p' or grid[new_y-1][new_x] == 'p' or grid[new_y+1][new_x] == 'p':
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if rand.randint(0, 100) < 1:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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else:
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grid[new_y][new_x] = 'p'
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set_paths += 1
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path_list.append((new_y, new_x))
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return grid
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def write_grid_as_graph_to_file(grid, filename, path="grids/"):
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"""
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Writes generated grid to file as a graph with weights
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:param grid: grid generated by function generate_grid
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:param filename: name of the file to save the graph to
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:param path: path to save the file in
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:return: None
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"""
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with open(path + filename, 'w') as file:
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for i in range(1, len(grid)-1):
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for j in range(1, len(grid[i])-1):
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if grid[i][j] == 'p':
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if grid[i-1][j] == 'p':
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file.write(str(i) + " " + str(j) + "," + str(i-1) + " " + str(j) + "," + "1" + "\n")
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if grid[i+1][j] == 'p':
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file.write(str(i) + " " + str(j) + "," + str(i+1) + " " + str(j) + "," + "1" + "\n")
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if grid[i][j-1] == 'p':
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file.write(str(i) + " " + str(j) + "," + str(i) + " " + str(j-1) + "," + "1" + "\n")
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if grid[i][j+1] == 'p':
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file.write(str(i) + " " + str(j) + "," + str(i) + " " + str(j+1) + "," + "1" + "\n")
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def read_grid_graph_from_file(filename, path="grids/"):
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N = set()
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A = {}
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A_b = {}
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w = {}
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with open(path + filename, "r") as file:
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line = file.readline()
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while line != '':
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split = line.strip("\n").split(",")
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fist_node_str_list = split[0].split(" ")
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second_node_str_list = split[1].split(" ")
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weight = int(split[2])
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first_node = (int(fist_node_str_list[0]), int(fist_node_str_list[1]))
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second_node = (int(second_node_str_list[0]), int(second_node_str_list[1]))
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N.add(first_node)
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N.add(second_node)
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if first_node not in A.keys():
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A[first_node] = [second_node]
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else:
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A[first_node].append(second_node)
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if second_node not in A_b.keys():
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A_b[second_node] = [first_node]
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else:
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A_b[second_node].append(first_node)
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w[(first_node, second_node)] = weight
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line = file.readline()
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return N, A, A_b, w
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if __name__ == "__main__":
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for i in range(1, 11):
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print("generating graph:", i, "of", 10)
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f = "grid" + str(i)
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g = generate_grid(rand.randint(202, 502), rand.randint(202, 502))
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write_grid_as_graph_to_file(g, f)
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