Mercurial > pyntnclick
annotate gamelib/state.py @ 41:ad6f56bfa8b7
Cryo door, titanium leg and some interaction prototypes.
author | Jeremy Thurgood <firxen@gmail.com> |
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date | Mon, 23 Aug 2010 00:49:22 +0200 |
parents | 088a101f5b94 |
children | 8f1fccb8cadf |
rev | line source |
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1 """Utilities and base classes for dealing with scenes.""" |
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2 |
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3 from albow.resource import get_image, get_sound |
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4 from pygame.locals import BLEND_ADD |
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6 |
9
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7 def initial_state(): |
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8 """Load the initial state.""" |
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9 state = State() |
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10 state.load_scenes("cryo") |
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11 state.set_current_scene("cryo") |
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12 return state |
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13 |
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14 |
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15 class State(object): |
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16 """Complete game state. |
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17 |
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18 Game state consists of: |
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19 |
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20 * items |
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21 * scenes |
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22 """ |
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23 |
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24 def __init__(self): |
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25 # map of scene name -> Scene object |
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26 self.scenes = {} |
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27 # map of item name -> Item object |
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28 self.items = {} |
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29 # list of item objects in inventory |
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30 self.inventory = [] |
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31 # current scene |
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32 self.current_scene = None |
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33 |
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34 def add_scene(self, scene): |
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35 self.scenes[scene.name] = scene |
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36 |
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37 def add_item(self, item): |
35 | 38 self.items[item.name] = item |
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39 |
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40 def load_scenes(self, modname): |
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41 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname]) |
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42 for scene_cls in mod.SCENES: |
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43 self.add_scene(scene_cls(self)) |
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44 |
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45 def set_current_scene(self, name): |
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46 self.current_scene = self.scenes[name] |
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47 |
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48 def add_inventory_item(self, name): |
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49 self.inventory.append(self.items[name]) |
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50 |
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51 def remove_inventory_item(self, name): |
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52 self.inventory.remove(self.items[name]) |
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53 |
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54 def draw(self, surface): |
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55 self.current_scene.draw(surface) |
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56 |
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57 def message(self, msg): |
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58 print msg |
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59 |
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60 |
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61 class Scene(object): |
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62 """Base class for scenes.""" |
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63 |
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64 # sub-folder to look for resources in |
22 | 65 FOLDER = None |
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66 |
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67 # name of background image resource |
22 | 68 BACKGROUND = None |
69 | |
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70 # name of scene (optional, defaults to folder) |
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71 NAME = None |
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72 |
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73 # initial scene data (optional, defaults to none) |
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74 INITIAL_DATA = None |
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75 |
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76 def __init__(self, state): |
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77 # scene name |
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78 self.name = self.NAME if self.NAME is not None else self.FOLDER |
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79 # link back to state object |
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80 self.state = state |
22 | 81 # map of thing names -> Thing objects |
82 self.things = {} | |
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83 self._background = get_image(self.FOLDER, self.BACKGROUND) |
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84 self.data = {} |
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85 if self.INITIAL_DATA: |
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86 self.data.update(self.INITIAL_DATA) |
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87 |
35 | 88 def add_item(self, item): |
89 self.state.add_item(item) | |
90 | |
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91 def add_thing(self, thing): |
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92 self.things[thing.name] = thing |
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93 thing.set_scene(self) |
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94 |
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95 def remove_thing(self, thing): |
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96 del self.things[thing.name] |
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97 |
22 | 98 def draw_background(self, surface): |
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99 surface.blit(self._background, (0, 0), None, BLEND_ADD) |
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100 |
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101 def draw_things(self, surface): |
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102 for thing in self.things.itervalues(): |
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103 thing.draw(surface) |
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104 |
22 | 105 def draw(self, surface): |
106 self.draw_background(surface) | |
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107 self.draw_things(surface) |
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108 |
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109 |
22 | 110 class Thing(object): |
111 """Base class for things in a scene that you can interact with.""" | |
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112 |
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113 # sub-folder to look for resources in |
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114 FOLDER = None |
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115 |
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116 # name of image resource |
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117 IMAGE = None |
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118 |
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119 def __init__(self, name, rect): |
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120 self.name = name |
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121 # area within scene that triggers calls to interact |
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122 self.rect = rect |
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123 # these are set by set_scene |
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124 self.scene = None |
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125 self.state = None |
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126 # TODO: add masks |
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127 # TODO: add images |
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128 |
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129 def set_scene(self, scene): |
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130 assert self.scene is None |
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131 self.scene = scene |
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132 self.state = scene.state |
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133 |
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134 def message(self, msg): |
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135 self.state.message(msg) |
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136 |
22 | 137 def interact(self, item): |
41
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138 if item is None: |
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139 self.interact_without() |
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140 else: |
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141 handler = getattr(self, 'interact_with_' + item.name, None) |
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142 if handler is not None: |
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143 handler(item) |
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144 else: |
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145 self.interact_default(item) |
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146 |
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147 def interact_without(self): |
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148 self.interact_default(None) |
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149 |
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150 def interact_default(self, item): |
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151 self.message("It doesn't work.") |
22 | 152 |
23
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153 def draw(self, surface): |
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154 pass |
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155 |
22 | 156 |
157 class Item(object): | |
158 """Base class for inventory items.""" | |
159 | |
35 | 160 # image for inventory |
161 INVENTORY_IMAGE = None | |
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162 |
35 | 163 def __init__(self, name): |
164 self.name = name | |
165 self.inventory_image = get_image('items', self.INVENTORY_IMAGE) | |
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166 # TODO: needs cursor |
22 | 167 |
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168 def get_inventory_image(self): |
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169 return self.inventory_image |
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170 |