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59
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1
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2 class Physicser(object):
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3 def add_to_space(self, space):
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4 raise NotImplementedError()
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5
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6 def remove_from_space(self, space):
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7 raise NotImplementedError()
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8
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9 def render_position(self):
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10 raise NotImplementedError()
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11
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12
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13 class NullPhysicser(Physicser):
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14 def add_to_space(self, space):
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15 pass
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16
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17 def remove_from_space(self, space):
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18 pass
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19
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20 def render_position(self):
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21 return (0, 0)
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22
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23
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24 class SingleShapePhysicser(Physicser):
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25 def __init__(self, shape):
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26 self._shape = shape
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27
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28 def add_to_space(self, space):
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29 space.add(self._shape, self._shape.body)
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30
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31 def remove_from_space(self, space):
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32 space.remove(self._shape, self._shape.body)
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33
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34 def render_position(self, surface):
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35 pos = self._shape.body.position
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36 import pymunk.pygame_util
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37 return pymunk.pygame_util.to_pygame(pos, surface)
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38 return (int(pos.x), int(pos.y))
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39
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40
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41 class Renderer(object):
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42 def render(self, surface, pos):
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43 raise NotImplementedError()
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44
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45
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46 class ImageRenderer(Renderer):
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47 def __init__(self, image):
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48 self._image = image
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49
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50 def render(self, surface, pos):
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51 surface.blit(self._image, pos)
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52
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53
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54 class ShapeRenderer(Renderer):
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55 def __init__(self, shape):
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56 self._shape = shape
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57
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58 def render(self, surface, pos):
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59 import pymunk.pygame_util
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60 pymunk.pygame_util.draw(surface, self._shape)
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61
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62
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63 class GameObject(object):
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64 """A representation of a thing in the game world.
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65
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66 This has a rendery thing, physicsy things and maybe some other things.
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67 """
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68
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69 def __init__(self, renderer, physicser=None):
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70 self.renderer = renderer
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71 if physicser is None:
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72 physicser = NullPhysicser()
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73 self.physicser = physicser
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74
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75 def add_to_space(self, space):
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76 self.physicser.add_to_space(space)
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77
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78 def render(self, surface):
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60
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79 return self.renderer.render(
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80 surface, self.physicser.render_position(surface))
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