koperkapel/loaders/levelloader.py

   1 """Loader a level, using the pygame-zero ResourceLoader infrastructure"""
   2
   3 import json
   4
   5 from pgzero.loaders import ResourceLoader
   6
   7 from ..gamelib.tiles import Wall, Floor, Tunnel, Underground, Grate
   8 from ..gamelib.level import Level
   9 from ..gamelib.door import Door
  10 from ..gamelib.keypad import Keypad
  11
  12
  13
  14 TILES = {
  15     "cwall": Wall, # rename this everywhere
  16     "floor": Floor,
  17     "tunnel": Tunnel,
  18     "underground": Underground,
  19 }
  20
  21 class LevelLoader(ResourceLoader):
  22     """ Level loader. """
  23
  24     EXTNS = ['json']
  25     TYPE = 'level'
  26
  27     def _load(self, level_path):
  28         f = open(level_path, 'r')
  29         level_data = json.load(f)
  30         f.close()
  31         self._level = Level()
  32         self._level.height = len(level_data['tiles'])
  33         self._level.width = len(level_data['tiles'][0])
  34         self._level.tiles = level_data['tiles']
  35         self._level.tileset = level_data['tileset']
  36         self._level.start_pos = level_data["starting pos"]
  37         # Consistency check, so we can assume things are correct
  38         # in the level renderer
  39         for row, row_data in enumerate(self._level.tiles):
  40             if len(row_data) != self._level.width:
  41                 raise RuntimeError("Incorrect len for row %d" % row)
  42         for tile in TILES.values():
  43             tile.TILESET = self._level.tileset
  44         self._load_tile_images()
  45         for door_info in level_data['door_info']:
  46             # Create the doors first
  47             doors = []
  48             for door in door_info['doors']:
  49                 x, y = door
  50                 # is this the right check
  51                 if self._level.can_walk(x + 1, y, 'floor') and self._level.can_walk(x - 1, y, 'floor'):
  52                     # vertical door
  53                     angle = 90
  54                 else:
  55                     angle = 0
  56                 new_door = Door(x, y, angle)
  57                 self._level.doors.append(new_door)
  58                 doors.append(new_door)
  59             # Add the keypads
  60             for keypad in door_info['keypads']:
  61                 new_keypad = Keypad(keypad[0], keypad[1], doors)
  62                 self._level.keypads.append(new_keypad)
  63         return self._level
  64
  65     def _load_tile_images(self):
  66         """Load all the tile images"""
  67         for y, row_data in enumerate(self._level.tiles):
  68             for x, tile in enumerate(row_data):
  69                 neighborhood = self._level.get_neighbors(x, y)
  70                 for layer in ['floor', 'tunnels']:
  71                     neighbors = [x[layer] if x else None for x in neighborhood]
  72                     tile['%s image' % layer] = \
  73                             TILES[tile[layer]['base']].image(neighbors)
  74                     # Hack this for now
  75                     if layer == 'floor' and 'crawl' in tile[layer]['behaviour']:
  76                         tile['floor image'] = Grate.image(neighbors)
  77                         self._level.grates.append((x, y))
  78
  79
  80 levels = LevelLoader('levels')