Mercurial > pyntnclick
annotate gamelib/state.py @ 56:75bf3d3689e9
Refactor thing interactivity and add "fake" bridge scene.
author | Jeremy Thurgood <firxen@gmail.com> |
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date | Mon, 23 Aug 2010 13:39:12 +0200 |
parents | 2e2f6ff54780 |
children | 3087be3463e0 |
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 |
11 | 5 |
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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.load_scenes("bridge") |
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12 #state.load_scenes("mess") |
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13 #state.load_scenes("engine") |
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14 #state.load_scenes("machine") |
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15 #state.load_scenes("map") |
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16 state.set_current_scene("cryo") |
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17 return state |
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18 |
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19 |
7
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20 class State(object): |
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21 """Complete game state. |
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22 |
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23 Game state consists of: |
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24 |
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25 * items |
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26 * scenes |
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27 """ |
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28 |
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29 def __init__(self): |
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30 # map of scene name -> Scene object |
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31 self.scenes = {} |
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32 # map of item name -> Item object |
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33 self.items = {} |
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34 # list of item objects in inventory |
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35 self.inventory = [] |
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36 # current scene |
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37 self.current_scene = None |
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38 |
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39 def add_scene(self, scene): |
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40 self.scenes[scene.name] = scene |
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41 |
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42 def add_item(self, item): |
35 | 43 self.items[item.name] = item |
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44 |
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45 def load_scenes(self, modname): |
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46 mod = __import__("gamelib.scenes.%s" % (modname,), fromlist=[modname]) |
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47 for scene_cls in mod.SCENES: |
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48 self.add_scene(scene_cls(self)) |
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49 |
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50 def set_current_scene(self, name): |
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51 self.current_scene = self.scenes[name] |
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52 |
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53 def add_inventory_item(self, name): |
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54 self.inventory.append(self.items[name]) |
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55 |
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56 def remove_inventory_item(self, name): |
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57 self.inventory.remove(self.items[name]) |
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58 |
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59 def draw(self, surface): |
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60 self.current_scene.draw(surface) |
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61 |
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62 def message(self, msg): |
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63 print msg |
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64 |
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65 |
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66 class StatefulGizmo(object): |
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67 |
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68 # initial data (optional, defaults to none) |
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69 INITIAL_DATA = None |
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70 |
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71 def __init__(self): |
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72 self.data = {} |
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73 if self.INITIAL_DATA: |
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74 self.data.update(self.INITIAL_DATA) |
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75 |
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76 def set_data(self, key, value): |
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77 self.data[key] = value |
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78 |
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79 def get_data(self, key): |
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80 return self.data.get(key, None) |
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81 |
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82 |
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83 class Scene(StatefulGizmo): |
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84 """Base class for scenes.""" |
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85 |
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86 # sub-folder to look for resources in |
22 | 87 FOLDER = None |
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88 |
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89 # name of background image resource |
22 | 90 BACKGROUND = None |
91 | |
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92 # name of scene (optional, defaults to folder) |
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93 NAME = None |
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94 |
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95 def __init__(self, state): |
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96 StatefulGizmo.__init__(self) |
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97 # scene name |
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98 self.name = self.NAME if self.NAME is not None else self.FOLDER |
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99 # link back to state object |
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100 self.state = state |
22 | 101 # map of thing names -> Thing objects |
102 self.things = {} | |
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103 self._background = get_image(self.FOLDER, self.BACKGROUND) |
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104 |
35 | 105 def add_item(self, item): |
106 self.state.add_item(item) | |
107 | |
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108 def add_thing(self, thing): |
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109 self.things[thing.name] = thing |
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110 thing.set_scene(self) |
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111 |
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112 def remove_thing(self, thing): |
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113 del self.things[thing.name] |
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114 |
22 | 115 def draw_background(self, surface): |
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116 surface.blit(self._background, (0, 0), None, BLEND_ADD) |
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117 |
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118 def draw_things(self, surface): |
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119 for thing in self.things.itervalues(): |
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120 thing.draw(surface) |
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121 |
22 | 122 def draw(self, surface): |
123 self.draw_background(surface) | |
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124 self.draw_things(surface) |
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125 |
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126 |
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127 class Thing(StatefulGizmo): |
22 | 128 """Base class for things in a scene that you can interact with.""" |
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129 |
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130 # sub-folder to look for resources in |
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131 FOLDER = None |
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132 |
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133 # name of image resource |
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134 IMAGE = None |
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135 |
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136 def __init__(self, name, rect): |
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137 StatefulGizmo.__init__(self) |
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138 self.name = name |
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139 # area within scene that triggers calls to interact |
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140 self.rect = rect |
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141 # these are set by set_scene |
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142 self.scene = None |
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143 self.state = None |
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144 # TODO: add masks |
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145 # TODO: add images |
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146 |
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147 def set_scene(self, scene): |
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148 assert self.scene is None |
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149 self.scene = scene |
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150 self.state = scene.state |
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151 |
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152 def message(self, msg): |
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153 self.state.message(msg) |
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154 |
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155 def is_interactive(self): |
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156 return True |
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157 |
22 | 158 def interact(self, item): |
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159 if not self.is_interactive(): |
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160 return |
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161 if item is None: |
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162 self.interact_without() |
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163 else: |
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164 handler = getattr(self, 'interact_with_' + item.name, None) |
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165 if handler is not None: |
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166 handler(item) |
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167 else: |
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168 self.interact_default(item) |
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169 |
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170 def interact_without(self): |
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171 self.interact_default(None) |
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172 |
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173 def interact_default(self, item): |
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174 self.message("It doesn't work.") |
22 | 175 |
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176 def draw(self, surface): |
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177 pass |
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178 |
22 | 179 |
180 class Item(object): | |
181 """Base class for inventory items.""" | |
182 | |
35 | 183 # image for inventory |
184 INVENTORY_IMAGE = None | |
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185 |
35 | 186 def __init__(self, name): |
187 self.name = name | |
188 self.inventory_image = get_image('items', self.INVENTORY_IMAGE) | |
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189 # TODO: needs cursor |
22 | 190 |
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191 def get_inventory_image(self): |
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192 return self.inventory_image |
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193 |