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202
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1 """Animation Loops"""
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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 from misc import Position
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7
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8 class Animation(Sprite):
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9 """Animation loop.
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10
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11 These are derived from sprites, since they behave similiary in most
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12 respects, but, to ensure draw ordering, we don't add them to
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13 the sprites list.
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14
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15 Ideally, animations should be quite short."""
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16
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17 def __init__(self, sequence, tile_pos):
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18 # Create the first frame
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19 self.iter = iter(sequence)
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20 Sprite.__init__(self, self.iter.next(), (-1000, -1000))
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21 if hasattr(tile_pos, 'to_tuple'):
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22 self.pos = tile_pos
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23 else:
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24 self.pos = Position(tile_pos[0], tile_pos[1])
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25 self.removed = False
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26
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27 def fix_pos(self, tv):
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28 ppos = tv.tile_to_view(self.pos.to_tuple())
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29 self.rect.x = ppos[0]
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30 self.rect.y = ppos[1]
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31
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32 def animate(self):
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33 """Step to the next frame.
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34
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35 Set removed flag when we hit the end of the sequence"""
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36 try:
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37 self.setimage(self.iter.next())
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38 except StopIteration:
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39 self.removed = True
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40
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41 class MuzzleFlash(Animation):
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42
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43 SEQUENCE_LEFT = [imagecache.load_image('sprites/muzzle_flash.png')]
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44 SEQUENCE_RIGHT = [imagecache.load_image('sprites/muzzle_flash.png',
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45 ("right_facing",))]
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46
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47 def __init__(self, chicken):
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48 if chicken.facing == 'right':
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49 Animation.__init__(self, self.SEQUENCE_RIGHT, chicken.pos)
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50 else:
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51 Animation.__init__(self, self.SEQUENCE_LEFT, chicken.pos)
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52
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