Mercurial > rinkhals
annotate gamelib/buildings.py @ 108:437cbd856a03
Add occupants and abodes. Allowing moving chickens around.
author | Simon Cross <hodgestar@gmail.com> |
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date | Wed, 02 Sep 2009 18:42:00 +0000 |
parents | 7e9c8ad06d32 |
children | 48019afde338 |
rev | line source |
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43 | 1 """Classes for various buildings in the game.""" |
2 | |
3 from pgu.vid import Sprite | |
4 | |
5 import imagecache | |
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6 import tiles |
43 | 7 |
8 class Building(Sprite): | |
9 """Base class for buildings""" | |
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, pos): |
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14 """Initial image, tile vid position, size and tile number for building.""" |
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15 self.day_image = imagecache.load_image(self.IMAGE) |
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16 self.night_image = imagecache.load_image(self.IMAGE, ('night',)) |
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17 self.pos = pos |
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18 self.size = self.SIZE |
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19 self.tile_no = self.TILE_NO |
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20 self._buy_price = self.BUY_PRICE |
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21 self._sell_price = self.SELL_PRICE |
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22 self._occupants = set() |
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23 |
43 | 24 # Create the building somewhere far off screen |
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25 Sprite.__init__(self, self.day_image, (-1000, -1000)) |
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26 |
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27 def tile_positions(self): |
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28 """Return pairs of (x, y) tile positions for each of the tile positions |
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29 occupied by the building. |
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30 """ |
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31 xpos, ypos = self.pos |
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32 xsize, ysize = self.size |
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33 |
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34 for dx in xrange(xsize): |
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35 for dy in xrange(ysize): |
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36 yield (xpos + dx, ypos + dy) |
43 | 37 |
38 def loop(self, tv, _sprite): | |
39 ppos = tv.tile_to_view(self.pos) | |
40 self.rect.x = ppos[0] | |
41 self.rect.y = ppos[1] | |
42 | |
43 def move(self, state): | |
44 """Given the game state, return a new position for the object""" | |
45 # Default is not to move | |
46 return self.pos | |
47 | |
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48 def place(self, tv): |
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49 """Check that the building can be placed at its current position |
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50 and place it if possible. |
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51 """ |
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52 # check that all spaces under the structure are grassland |
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53 for tile_pos in self.tile_positions(): |
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54 if not tv.get(tile_pos) == self.GRASSLAND: |
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55 return False |
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56 |
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57 # place tile |
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58 for tile_pos in self.tile_positions(): |
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59 tv.set(tile_pos, self.tile_no) |
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60 |
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61 return True |
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62 |
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63 def covers(self, tile_pos): |
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64 """Return True if build covers tile_pos, False otherwise.""" |
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65 xpos, ypos = self.pos |
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66 xsize, ysize = self.size |
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67 return (xpos <= tile_pos[0] < xpos + xsize) and \ |
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68 (ypos <= tile_pos[1] < ypos + ysize) |
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69 |
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70 def remove(self, tv): |
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71 """Remove the building from its current position.""" |
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72 # remove tile |
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73 for tile_pos in self.tile_positions(): |
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74 tv.set(tile_pos, self.GRASSLAND) |
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75 |
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76 def buy_price(self): |
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77 return self._buy_price |
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78 |
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79 def sell_price(self): |
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80 return self._sell_price |
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81 |
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82 def sun(self, sun_on): |
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83 if sun_on: |
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84 self.setimage(self.day_image) |
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85 else: |
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86 self.setimage(self.night_image) |
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87 |
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88 def occupants(self): |
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89 """Return list of buildings occupants.""" |
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90 return list(self._occupants) |
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91 |
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92 def add_occupant(self, occupant): |
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93 if occupant.abode is not None: |
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94 occupant.abode.remove_occupant(occupant) |
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95 occupant.abode = self |
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96 self._occupants.add(occupant) |
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97 |
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98 def remove_occupant(self, occupant): |
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99 if occupant in self._occupants: |
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100 self._occupants.remove(occupant) |
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101 occupant.abode = None |
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102 |
43 | 103 class HenHouse(Building): |
104 """A HenHouse.""" | |
105 | |
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106 TILE_NO = tiles.REVERSE_TILE_MAP['henhouse'] |
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107 BUY_PRICE = 100 |
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108 SELL_PRICE = 90 |
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109 SIZE = (3, 2) |
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110 IMAGE = 'sprites/henhouse.png' |
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111 NAME = 'Hen House' |
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112 |
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113 |
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114 class GuardTower(Building): |
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115 """A GuardTower.""" |
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116 |
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117 TILE_NO = tiles.REVERSE_TILE_MAP['guardtower'] |
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118 BUY_PRICE = 200 |
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119 SELL_PRICE = 150 |
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120 SIZE = (2, 2) |
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121 IMAGE = 'sprites/watchtower.png' |
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122 NAME = 'Watch Tower' |
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123 |
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124 def is_building(obj): |
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125 """Return true if obj is a build class.""" |
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126 return hasattr(obj, "NAME") |
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127 |
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128 BUILDINGS = [] |
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129 for name in dir(): |
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130 obj = eval(name) |
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131 try: |
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132 if is_building(obj): |
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133 BUILDINGS.append(obj) |
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134 except TypeError: |
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135 pass |