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annotate gamestate.py @ 183:7b6aba7839ea

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getGameEnvironment of GameState now returns a locals dictionary that is empty at the beginning of the game and will be saved in save games. The vals and funcs are now both in the globals dictionary. This WILL break old saves.
author Beliar <KarstenBock@gmx.net>
date Thu, 15 Mar 2012 16:24:05 +0100
parents 0d0422243490
children 9e7f494cc850
rev   line source
0
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1 # This file is part of PARPG.
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2
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3 # PARPG is free software: you can redistribute it and/or modify
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4 # it under the terms of the GNU General Public License as published by
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5 # the Free Software Foundation, either version 3 of the License, or
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6 # (at your option) any later version.
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7
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8 # PARPG is distributed in the hope that it will be useful,
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9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 # GNU General Public License for more details.
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12
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13 # You should have received a copy of the GNU General Public License
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14 # along with PARPG. If not, see <http://www.gnu.org/licenses/>.
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15
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16 import math
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17
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18 from parpg.quest_engine import QuestEngine
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19
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20 class GameState(object):
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21 """This class holds the current state of the game."""
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22 def __init__(self, quests_dir = None):
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23 self.player_character = None
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24 self.quest_engine = QuestEngine(quests_dir)
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25 self.quest_engine.readQuests()
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26 self.objects = {}
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27 self.object_ids = {}
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28 self.current_map_name = None
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29 self.maps = {}
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30 self.npcs_met = set()
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31 self.funcs = {
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32 "__builtins__":None,
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33 "meet":self.meet,
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34 "met":self.met,
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35 "sqrt":math.sqrt,
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36 "log":math.log,
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37 }
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38 self.locals = {}
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40
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41 def addObject(self, object_id, map_id, game_object):
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42 """Adds an object to the objects and object_ids
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43 dictionaries.
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44 @param object_id: ID of the object
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45 @type object_id: str
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46 @param map_id: ID of the map the object is on.
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47 If the object is in a container this has to be None
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48 @type map_id: str or None
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49 @param object: object to be added
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50 @type object: GameObject
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51 """
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52 if not self.object_ids.has_key(object_id):
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53 if not self.objects.has_key(map_id):
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54 self.objects[map_id] = {}
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55 self.objects[map_id][object_id] = game_object
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56 self.object_ids[object_id] = map_id
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57
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58 def deleteObject(self, object_id):
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59 """Removes an object from the dictionaries
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60 @param object_id: ID of the object
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61 @type object_id: str
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62 @returns The deleted object
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63 """
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64 if self.hasObject(object_id):
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65 map_id = self.getMapOfObject(object_id)
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66 if map_id:
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67 inst = self.maps[map_id].agent_layer.getInstance(object_id)
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68 self.maps[map_id].agent_layer.deleteInstance(inst)
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69 obj = self.objects[map_id][object_id]
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70 del self.objects[map_id][object_id]
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71 del self.object_ids[object_id]
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72 return obj
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73 return None
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75
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76 def getObjectsFromMap(self, map_id):
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77 """Gets all objects that are currently on the given map.
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78 @type map: String
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79 @param map: The map name.
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80 @returns: The list of objects on this map. Or an empty list"""
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81 return [i for i in self.getObjectDictOfMap(map_id).values()
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82 if map_id in self.objects]
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83
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84
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85 def getObjectDictOfMap(self, map_id):
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86 if map_id in self.objects:
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87 return self.objects[map_id]
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88 return {}
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89
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90 def deleteObjectsFromMap(self, map_id):
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91 """Deletes all objects of the given map.
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92 @type map: String
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93 @param map: The map name.
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94 @returns: None"""
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95 deleted_objs = []
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96 if map_id in self.objects:
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97 for obj in self.objects[map_id].copy():
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98 deleted_objs.append(self.deleteObject(obj))
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99 return deleted_objs
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100
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101 def hasObject(self, object_id):
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102 """Check if an object with the given id is present
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103 @param object_id: ID of the object
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104 @type object_id: str
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105 @return: True if there is an object False if not
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106 """
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107 return self.object_ids.has_key(object_id)
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108
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109 def getMapOfObject(self, object_id):
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110 """Returns the map the object is on.
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111 @param object_id: ID of the object
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112 @type object_id: str
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113 @return: Name of the map the object is on.
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114 If there is no such object or the object is in a container None is returned
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115 """
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116 if self.object_ids.has_key(object_id):
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117 return self.object_ids[object_id]
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118 return None
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119
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120 def getObjectById(self, obj_id, map_id = None):
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121 """Gets an object by its object id and map id
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122 @type obj_id: String
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123 @param obj_id: The id of the object.
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124 @type map_id: String
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125 @param map_id: It id of the map containing the object.
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126 @returns: The object or None."""
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127 if not map_id:
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128 map_id = self.getMapOfObject(obj_id)
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129 if not map_id in self.objects:
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130 self.objects[map_id] = {}
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131 if obj_id in self.objects[map_id]:
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132 return self.objects[map_id][obj_id]
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133
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134 def clearObjects(self):
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135 """Delete all objects from the state
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136 """
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137 self.objects = {}
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138 self.object_ids = {}
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139
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140 def getStateForSaving(self):
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141 """Prepares state for saving
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142 @type state: dictionary
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143 @param state: State of the object
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144 """
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145 ret_dict = {}
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146 ret_dict["CurrentMap"] = self.current_map_name
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147 ret_dict["Quests"] = self.quest_engine.getStateForSaving()
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148 ret_dict["NPCsMet"] = self.npcs_met
183
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149 ret_dict["locals"] = self.locals
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150 return ret_dict
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151
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152 def restoreFromState(self, state):
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153 """Restores the state"""
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154 self.current_map_name = state["CurrentMap"]
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155 self.npcs_met = state["NPCsMet"]
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156 self.locals = state["locals"]
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157 self.quest_engine.readQuests()
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158 self.quest_engine.restoreFromState(state["Quests"])
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159
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160 def meet(self, npc):
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161 """Record that the PC has met a certain NPC
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162 @type npc: str
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163 @param npc: The NPC's name or id"""
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164 if npc in self.npcs_met:
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165 # we could raise an error here, but should probably be a warn
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166 # raise RuntimeError("I already know %s" % npc)
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167 return
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168 self.npcs_met.add(npc)
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169
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170 def met(self, npc):
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171 """Indicate whether the PC has met this npc before
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172 @type npc: str
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173 @param npc: The NPC's name or id
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174 @return: None"""
174
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175 return npc in self.npcs_met
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176
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177 def getGameEnvironment(self):
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178 """Returns a 2 item list containing the entities and functions that
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179 can work with it. This can be used in functions like eval or exec"""
183
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180 globals = {}
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181 globals.update(self.funcs)
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182 globals.update(self.getObjectDictOfMap(self.current_map_name))
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183
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184 return globals, self.locals