CODEWITHSUNDEEP
pythonrandompygame
Master Chef
Master Chef

Reputation: 65

How to select a random tmx map to be loaded? Opening a random file in pygame?

Trying to select a random map from my maps folder when certain conditions are met, how would I go about selecting a new map. 

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

Upvotes: 0

Views: 166

Answers (1)

furas
furas

Reputation: 143216

To get something random you need module random

You can use choice() to get random item from list

import random

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

map = random.choice(MAP)

print(map)

But if you use again choice() then sometimes you may get the same map. To get different map you would have to remove already used map from MAP before next choice()

OR you can do this in different way. Using shuffle() you get list with items in random order and then you can use for-loop to get always unique and random map

import random

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

random.shuffle(MAP)

for map in MAPS:
    print(map)

EDIT: to keep first map always as first and shuffle only other maps

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)

BTW: in the same way you can keep first and second map in place

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

EDIT: After shuffling

To load only first map

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

To work with all maps you may run in loop

for map in MAP:

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

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

OR use variable with level

# 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.

Upvotes: 1

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