Mercurial > rinkhals

annotate gamelib/animal.py @ 47:be2496df2368

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Add egg image to egg sprite.
author Simon Cross <hodgestar@gmail.com>
date Mon, 31 Aug 2009 16:57:39 +0000
parents 7e884084e7b1
children f20dd3dcb118
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1 """Class for the various animals in the game"""
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3 from pgu.vid import Sprite
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5 import imagecache
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7 class Animal(Sprite):
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8 """Base class for animals"""
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10 def __init__(self, image, pos):
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11 # Create the animal somewhere far off screen
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12 Sprite.__init__(self, image, (-1000, -1000))
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13 self.pos = pos
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15 def loop(self, tv, _sprite):
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16 ppos = tv.tile_to_view(self.pos)
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17 self.rect.x = ppos[0]
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18 self.rect.y = ppos[1]
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20 def move(self, state):
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21 """Given the game state, return a new position for the object"""
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22 # Default is not to move
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23 return self.pos
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25 class Chicken(Animal):
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26 """A chicken"""
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28 def __init__(self, pos):
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29 image = imagecache.load_image('sprites/chkn.png')
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30 Animal.__init__(self, image, pos)
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32 def move(self, gameboard):
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33 """A free chicken will move away from other free chickens"""
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34 return self.pos
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36 class Egg(Animal):
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37 """An egg"""
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39 def __init__(self, pos):
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40 image = imagecache.load_image('sprites/egg.png')
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41 Animal.__init__(self, image, pos)
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43 # Eggs don't move
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45 class Fox(Animal):
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46 """A fox"""
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48 def __init__(self, pos):
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49 image = imagecache.load_image('sprites/fox.png')
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50 self.full = False
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51 Animal.__init__(self, image, pos)
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53 def move(self, gameboard):
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54 """Foxes will aim to move towards the closest henhouse or free
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55 chicken"""
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56 if self.full:
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57 return
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58 # Find the closest chicken
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59 min_dist = 999
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60 min_vec = None
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61 closest = None
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62 for chicken in gameboard.chickens:
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63 vec = (chicken.pos[0] - self.pos[0], chicken.pos[1] - self.pos[1])
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64 dist = abs(vec[0]) + abs(vec[1])
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65 if dist < min_dist:
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66 min_dist = dist
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67 min_vec = vec
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68 closest = chicken
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69 xpos, ypos = self.pos
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70 if min_vec[0] < 0:
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71 xpos -= 1
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72 elif min_vec[0] > 0:
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73 xpos += 1
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74 if min_vec[1] < 0:
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75 ypos -= 1
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76 elif min_vec[1] > 0:
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77 ypos += 1
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78 if closest.pos == self.pos:
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79 gameboard.remove_chicken(closest)
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80 self.full = True
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81 for fox in gameboard.foxes:
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82 if fox is not self:
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83 if fox.pos[0] == xpos and fox.pos[1] == ypos:
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84 if xpos != self.pos[0]:
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85 xpos = self.pos[0]
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86 elif ypos != self.pos[1]:
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87 ypos = self.pos[1]
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88 else: # We move a step away
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89 xpos += 1
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90 self.pos = (xpos, ypos)
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