Mercurial > rinkhals

annotate gamelib/buildings.py @ 57:08665fa60345

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Implement henhouses and henhouse adding.
author Simon Cross <hodgestar@gmail.com>
date Mon, 31 Aug 2009 18:34:10 +0000
parents fb5be14ea930
children 1047ccd22dac
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1 """Classes for various buildings in the game."""
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2
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3 from pgu.vid import Sprite
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4
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5 import imagecache
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6 import tiles
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7
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8 class Building(Sprite):
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9 """Base class for buildings"""
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10
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11 GRASSLAND = tiles.REVERSE_TILE_MAP['grassland']
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12
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13 def __init__(self, day_image, night_image, pos, size, tile_no):
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14 """Initial image, tile vid position, size and tile number for building."""
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15 # Create the building somewhere far off screen
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16 Sprite.__init__(self, day_image, (-1000, -1000))
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17 self.day_image = day_image
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18 self.night_image = night_image
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19 self.pos = pos
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20 self.size = size
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21 self.tile_no = tile_no
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22
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23 def tile_positions(self):
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24 """Return pairs of (x, y) tile positions for each of the tile positions
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25 occupied by the building."""
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26 xpos, ypos = self.pos
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27 xsize, ysize = self.size
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28
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29 for dx in xrange(xsize):
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30 for dy in xrange(ysize):
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31 yield (xpos + dx, ypos + dy)
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32
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33 def loop(self, tv, _sprite):
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34 ppos = tv.tile_to_view(self.pos)
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35 self.rect.x = ppos[0]
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36 self.rect.y = ppos[1]
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37
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38 def move(self, state):
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39 """Given the game state, return a new position for the object"""
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40 # Default is not to move
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41 return self.pos
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42
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43 def place(self, tv):
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44 """Check that the building can be placed at its current position
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45 and place it if possible.
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46 """
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47 xpos, ypos = self.pos
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48 xsize, ysize = self.size
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49
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50 # check that all spaces under the structure are grassland
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51 for tile_pos in self.tile_positions():
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52 if not tv.get(tile_pos) == self.GRASSLAND:
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53 return False
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54
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55 # place tile
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56 for tile_pos in self.tile_positions():
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57 tv.set(tile_pos, self.tile_no)
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58
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59 return True
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60
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61 def sun(self, sun_on):
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62 if sun_on:
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63 self.setimage(self.day_image)
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64 else:
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65 self.setimage(self.night_image)
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66
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67 class HenHouse(Building):
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68 """A HenHouse."""
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69
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70 HENHOUSE = tiles.REVERSE_TILE_MAP['henhouse']
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71
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72 def __init__(self, pos):
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73 day_image = imagecache.load_image('sprites/henhouse.png')
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74 night_image = imagecache.load_image('sprites/henhouse.png', ('night',))
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75 size = (3, 2)
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76 Building.__init__(self, day_image, night_image, pos, size, self.HENHOUSE)
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78
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79 class GuardTower(Building):
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80 """A GuardTower."""
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81
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82 GUARDTOWER = tiles.REVERSE_TILE_MAP['guardtower']
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83
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84 def __init__(self, pos):
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85 day_image = imagecache.load_image('sprites/guardtower.png')
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86 night_image = imagecache.load_image('sprites/guardtower.png', ('night',))
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87 size = (1, 1)
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88 Building.__init__(self, day_image, night_image, pos, size, self.GUARDTOWER)