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annotate nagslang/game_object.py @ 63:7f038ee778ad

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Put werewolf facing direction magic back.
author Jeremy Thurgood <firxen@gmail.com>
date Sun, 01 Sep 2013 19:18:12 +0200
parents 1d67a8c9861d
children a1b4d09e6f23
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63
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1 import math
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3
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4 class Physicser(object):
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5 def add_to_space(self, space):
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6 raise NotImplementedError()
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7
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8 def remove_from_space(self, space):
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9 raise NotImplementedError()
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10
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11 def render_position(self, surface):
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12 raise NotImplementedError()
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13
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14 def render_angle(self):
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15 raise NotImplementedError()
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16
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17
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18 class NullPhysicser(Physicser):
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19 def add_to_space(self, space):
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20 pass
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21
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22 def remove_from_space(self, space):
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23 pass
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24
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25 def render_position(self):
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26 return (0, 0)
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27
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28 def render_angle(self):
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29 return 0
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31
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32 class SingleShapePhysicser(Physicser):
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33 def __init__(self, shape):
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34 self._shape = shape
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35
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36 def add_to_space(self, space):
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37 space.add(self._shape, self._shape.body)
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38
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39 def remove_from_space(self, space):
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40 space.remove(self._shape, self._shape.body)
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41
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42 def render_position(self, surface):
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43 pos = self._shape.body.position
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44 import pymunk.pygame_util
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45 return pymunk.pygame_util.to_pygame(pos, surface)
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46
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47 def render_angle(self):
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48 return self._shape.body.angle
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50
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51 class Renderer(object):
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52 def render(self, surface, pos, angle):
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53 raise NotImplementedError()
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54
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55
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56 def image_pos(image, pos):
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57 return (pos[0] - image.get_width() / 2,
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58 pos[1] - image.get_height() / 2)
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59
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60
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61 class ImageRenderer(Renderer):
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62 def __init__(self, image):
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63 self._image = image
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64
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65 def render(self, surface, pos, angle):
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66 surface.blit(self._image, image_pos(self._image, pos))
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67
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68
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69 class FacingImageRenderer(Renderer):
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70 def __init__(self, left_image, right_image):
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71 self._images = {
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72 'left': left_image,
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73 'right': right_image,
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74 }
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75
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76 def get_image(self, angle):
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77 if abs(angle) < math.pi / 2:
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78 return self._images['right']
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79 return self._images['left']
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80
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81 def render(self, surface, pos, angle):
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82 image = self.get_image(angle)
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83 surface.blit(image, image_pos(image, pos))
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84
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85
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86 class ShapeRenderer(Renderer):
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87 def __init__(self, shape):
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88 self._shape = shape
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89
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90 def render(self, surface, pos, angle):
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91 import pymunk.pygame_util
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92 pymunk.pygame_util.draw(surface, self._shape)
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93
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94
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95 class GameObject(object):
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96 """A representation of a thing in the game world.
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97
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98 This has a rendery thing, physicsy things and maybe some other things.
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99 """
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100
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101 def __init__(self, renderer, physicser=None):
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102 self.renderer = renderer
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103 if physicser is None:
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104 physicser = NullPhysicser()
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105 self.physicser = physicser
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106
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107 def add_to_space(self, space):
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108 self.physicser.add_to_space(space)
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109
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110 def render(self, surface):
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111 return self.renderer.render(
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112 surface, self.physicser.render_position(surface),
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113 self.physicser.render_angle())