annotate nagslang/game_object.py @ 91:5c31b4d1851c

Remove NullPhysicser, since it looks like everything needs PHYSICS!!!
author Jeremy Thurgood <firxen@gmail.com>
date Mon, 02 Sep 2013 08:36:46 +0200
parents 11b0017b5e4b
children d6a49f0c1e6e
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1 import math
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2
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3 import pygame
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4 import pymunk
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5
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6 from nagslang.constants import SWITCH_PUSHERS, COLLISION_TYPE_SWITCH
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8
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9 class Puzzler(object):
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10 def get_state(self, space):
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11 raise NotImplementedError()
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12
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13 def notify(self):
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14 pass
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15
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16
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17 class FloorSwitchPuzzler(Puzzler):
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18 def __init__(self, shape):
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19 self.shape = shape
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20
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21 def get_state(self, space):
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22 for shape in space.shape_query(self.shape):
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23 if shape.collision_type in SWITCH_PUSHERS:
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24 return True
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25 return False
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27
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28 class Physicser(object):
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29 def add_to_space(self, space):
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30 raise NotImplementedError()
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31
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32 def remove_from_space(self, space):
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33 raise NotImplementedError()
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34
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35 def render_position(self, surface):
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36 raise NotImplementedError()
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37
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38 def render_angle(self):
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39 raise NotImplementedError()
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40
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41
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42 class SingleShapePhysicser(Physicser):
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43 def __init__(self, shape):
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44 self._shape = shape
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45
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46 def add_to_space(self, space):
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47 space.add(self._shape, self._shape.body)
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48
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49 def remove_from_space(self, space):
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50 space.remove(self._shape, self._shape.body)
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51
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52 def render_position(self, surface):
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53 pos = self._shape.body.position
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54 import pymunk.pygame_util
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55 return pymunk.pygame_util.to_pygame(pos, surface)
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56
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57 def render_angle(self):
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58 return self._shape.body.angle
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61 class Renderer(object):
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62 def render(self, surface, pos, angle):
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63 raise NotImplementedError()
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64
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65
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66 def image_pos(image, pos):
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67 return (pos[0] - image.get_width() / 2,
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68 pos[1] - image.get_height() / 2)
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69
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70
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71 class ImageRenderer(Renderer):
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72 def __init__(self, image):
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73 self._image = image
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74
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75 def render(self, surface, pos, angle):
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76 surface.blit(self._image, image_pos(self._image, pos))
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78
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79 class FacingImageRenderer(Renderer):
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80 def __init__(self, left_image, right_image):
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81 self._images = {
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82 'left': left_image,
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83 'right': right_image,
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84 }
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85
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86 def get_image(self, angle):
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87 if abs(angle) < math.pi / 2:
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88 return self._images['right']
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89 return self._images['left']
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90
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91 def render(self, surface, pos, angle):
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92 image = self.get_image(angle)
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93 surface.blit(image, image_pos(image, pos))
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94
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95
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96 class ShapeRenderer(Renderer):
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97 def __init__(self, shape):
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98 self._shape = shape
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99
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100 def render(self, surface, pos, angle):
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101 import pymunk.pygame_util
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102 pymunk.pygame_util.draw(surface, self._shape)
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103
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104
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105 class GameObject(object):
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106 """A representation of a thing in the game world.
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107
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108 This has a rendery thing, physicsy things and maybe some other things.
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109 """
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110
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111 def __init__(self, renderer, physicser, puzzler=None):
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112 self.renderer = renderer
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113 self.physicser = physicser
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114 self.puzzler = puzzler
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115
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116 def add_to_space(self, space):
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117 self.physicser.add_to_space(space)
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118
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119 def render(self, surface):
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120 return self.renderer.render(
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121 surface, self.physicser.render_position(surface),
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122 self.physicser.render_angle())
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123
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124
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125 class FloorSwitch(GameObject):
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126 def __init__(self, position):
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127 body = pymunk.Body()
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128 body.position = position
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129 self.shape = pymunk.Circle(body, 30)
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130 self.shape.collision_type = COLLISION_TYPE_SWITCH
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131 self.shape.sensor = True
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132 super(FloorSwitch, self).__init__(
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133 ShapeRenderer(self.shape),
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134 SingleShapePhysicser(self.shape),
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135 FloorSwitchPuzzler(self.shape),
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136 )
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137
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138 def add_to_space(self, space):
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139 # XXX: Hacky hack.
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140 self._space = space
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141
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142 def render(self, surface):
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143 if self.puzzler.get_state(self._space):
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144 self.shape.color = pygame.color.THECOLORS['green']
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145 else:
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146 self.shape.color = pygame.color.THECOLORS['red']
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147 super(FloorSwitch, self).render(surface)