如何选择要加载的随机 tmx 地图？在pygame中打开一个随机文件？

Question

尝试在满足某些条件时从我的地图文件夹中选择随机地图，我将如何选择新地图。

MAP = ['map.tmx', 'map2.tmx', 'map3.tmx']

self.map_folder = path.join(game_folder, 'maps')
self.map = TiledMap(path.join(self.map_folder, MAP))

class TiledMap:
    def __init__(self, filename):
        tm = pytmx.load_pygame(filename, pixelalpha=True)
        self.width = tm.width * tm.tilewidth
        self.height = tm.height * tm.tileheight
        self.tmxdata = tm

    def render(self, surface):
        ti = self.tmxdata.get_tile_image_by_gid
        for layer in self.tmxdata.visible_layers:
            if isinstance(layer, pytmx.TiledTileLayer):
                for x, y, gid, in layer:
                    tile = ti(gid)
                    if tile:
                        surface.blit(tile, (x * self.tmxdata.tilewidth,
                                            y * self.tmxdata.tileheight))

    def make_map(self):
        surface = py.Surface((self.width, self.height))
        self.render(surface)
        return surface

Answer 1

要获得随机的东西，您需要模块 random

您可以使用choice() 从列表中获取随机项

import random

MAP = ['map.tmx', 'map2.tmx', 'map3.tmx']

map = random.choice(MAP)

print(map)

但如果你再次使用choice()，那么有时你可能会得到相同的地图。要获得不同的地图，您必须在下一个 choice() 之前从 MAP 中删除已使用的地图

或者你可以用不同的方式做到这一点。使用shuffle()，您将获得包含随机顺序项目的列表，然后您可以使用for-loop 获得始终唯一且随机的地图

import random

MAP = ['map.tmx', 'map2.tmx', 'map3.tmx']

random.shuffle(MAP)

for map in MAPS:
    print(map)

---

编辑：始终保持第一张地图为第一张，仅随机播放其他地图

import random

MAP = ['map.tmx', 'map2.tmx', 'map3.tmx', 'map4.tmx', 'map5.tmx']

first = MAP[:1]  # list with one element - it need `first + rest` instead of `[first] + rest`
rest  = MAP[1:]
random.shuffle(rest)

MAP = first + rest

print(MAP)

顺便说一句：你可以用同样的方式来保持第一张和第二张地图的位置

first = MAP[:2]
rest  = MAP[2:]

---

编辑：洗牌后

只加载第一张地图

map = MAP[0]
fullpath = path.join(self.map_folder, map)
self.map = TiledMap(fullpath)

要处理所有可以循环运行的地图

for map in MAP:

    fullpath = path.join(self.map_folder, map)
    self.map = TiledMap(fullpath)

    # ... run game with this map ...

或者将变量与level一起使用

# first level 

level = 0

map = MAP[level]
fullpath = path.join(self.map_folder, map)
self.map = TiledMap(fullpath)

# ... run game with this map ...

# next level 

level += 1

map = MAP[level]
fullpath = path.join(self.map_folder, map)
self.map = TiledMap(fullpath)

# ... run game with this map ...

# next level 

level += 1

map = MAP[level]
fullpath = path.join(self.map_folder, map)
self.map = TiledMap(fullpath)

# ... run game with this map ...

# etc.