Mercurial > parpg-source
annotate systems/scriptingsystem.py @ 173:3abd31885f0f
Added a method to the ScriptingSystem that returns the environment(locals, globals) in which scripts are run.
| author | Beliar <KarstenBock@gmx.net> |
|---|---|
| date | Thu, 01 Mar 2012 14:49:09 +0100 |
| parents | 565ffdd98d68 |
| children | 230d316cc43b |
| rev | line source |
|---|---|
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1 # This program is free software: you can redistribute it and/or modify |
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2 # it under the terms of the GNU General Public License as published by |
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3 # the Free Software Foundation, either version 3 of the License, or |
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4 # (at your option) any later version. |
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5 # |
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6 # This program is distributed in the hope that it will be useful, |
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7 # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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Refactored components and began defining basic Entities and Systems.
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parents:
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8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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Refactored components and began defining basic Entities and Systems.
M. George Hansen <technopolitica@gmail.com>
parents:
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9 # GNU General Public License for more details. |
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M. George Hansen <technopolitica@gmail.com>
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10 # |
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11 # You should have received a copy of the GNU General Public License |
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12 # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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13 |
| 160 | 14 from collections import deque |
| 15 from copy import deepcopy | |
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16 import math |
| 160 | 17 |
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18 from parpg.bGrease import System |
| 157 | 19 |
| 20 class Script(object): | |
| 21 """Script object""" | |
| 22 | |
| 160 | 23 def __init__(self, actions, system): |
| 157 | 24 """Constructor""" |
| 25 assert(isinstance(actions, deque)) | |
| 26 self.actions = actions | |
| 160 | 27 assert(isinstance(system, ScriptingSystem)) |
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28 self.system = system |
| 160 | 29 self.reset() |
| 30 | |
| 31 def reset(self): | |
| 32 """Resets the state of the script""" | |
| 33 self.running_actions = deepcopy(self.actions) | |
| 157 | 34 self.running = False |
| 35 self.finished = False | |
| 36 self.time = 0 | |
| 37 self.wait = 0 | |
| 38 self.cur_action = None | |
| 160 | 39 |
| 157 | 40 def update(self, time): |
| 41 """Advance the script""" | |
| 42 if not self.running: | |
| 43 return | |
| 44 if self.cur_action and not self.cur_action.executed: | |
| 45 return | |
| 46 self.time += time | |
| 47 if self.wait <= self.time: | |
| 48 self.time = 0 | |
| 49 try: | |
| 160 | 50 action_data = self.running_actions.popleft() |
| 51 action = self.system.actions[action_data[0]] | |
| 52 action_params = eval(action_data[1], | |
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3abd31885f0f
Added a method to the ScriptingSystem that returns the environment(locals, globals) in which scripts are run.
Beliar <KarstenBock@gmx.net>
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53 *self.system.getEnvironment() |
| 160 | 54 ) |
| 164 | 55 if not (isinstance(action_params, list) |
| 56 or isinstance(action_params, tuple)): | |
| 57 action_params = [action_params] | |
| 58 self.cur_action = action(self.system.world, *action_params) | |
| 160 | 59 self.wait = action_data[2] |
| 60 if len(action_data) >= 4: | |
| 61 vals = ( | |
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62 eval(action_data[4], *self.system.getEnvironment()) |
| 160 | 63 if len(action_data) > 4 |
| 64 else () | |
| 65 ) | |
| 66 command = action_data[3] | |
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67 self.system.commands[command]( |
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68 *vals, |
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69 action=self.cur_action |
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70 ) |
| 157 | 71 else: |
| 72 self.cur_action.execute() | |
| 73 except IndexError: | |
| 74 self.finished = True | |
| 75 self.running = False | |
| 76 | |
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77 |
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78 class ScriptingSystem(System): |
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79 """ |
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80 System responsible for managing scripts attached to entities to define |
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81 their behavior. |
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82 """ |
| 157 | 83 |
| 160 | 84 def __init__(self, commands, actions): |
| 157 | 85 """Constructor""" |
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86 self.__funcs = {} |
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87 self.common_funcs = { |
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88 "sqrt":math.sqrt, |
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89 "log":math.log, |
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90 } |
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91 self.__vals = {} |
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92 self.commands = commands |
| 160 | 93 self.actions = actions |
| 94 self.game_state = None | |
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95 self.reset() |
| 157 | 96 |
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97 def reset(self): |
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98 """Resets the script and condition collections""" |
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99 self.scripts = {} |
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100 self.conditions = [] |
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101 |
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102 def getEnvironment(self): |
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103 """Returns the globals and locals used by the scripting system""" |
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104 return self.__vals, self.__funcs |
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105 |
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106 |
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107 def updateEnvironment(self): |
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108 self.__vals.clear() |
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109 self.__vals.update(self.game_state.getObjectDictOfMap(self.game_state.current_map_name)) |
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110 self.__funcs.clear() |
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111 self.__funcs.update(self.game_state.funcs) |
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112 self.__funcs.update(self.common_funcs) |
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113 |
| 157 | 114 def step(self, dt): |
| 115 """Execute a time step for the system. Must be defined | |
| 116 by all system classes. | |
| 117 | |
| 118 :param dt: Time since last step invocation | |
| 119 :type dt: float | |
| 120 """ | |
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121 self.updateEnvironment() |
| 160 | 122 for condition_data in self.conditions: |
| 123 condition = condition_data[0] | |
| 124 script_name = condition_data[1] | |
| 125 if not self.scripts.has_key(script_name): | |
| 126 return | |
| 127 script = self.scripts[script_name] | |
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128 if eval(condition, *self.getEnvironment()) and not script.running: |
| 160 | 129 script.running = True |
| 130 for script in self.scripts.itervalues(): | |
| 157 | 131 assert(isinstance(script, Script)) |
| 132 if script.finished: | |
| 160 | 133 script.reset() |
| 157 | 134 elif script.running: |
| 135 script.update(dt) | |
| 160 | 136 |
| 137 def setScript(self, name, actions): | |
| 138 """Sets a script. | |
| 139 @param name: The name of the script | |
| 140 @param actions: What the script does | |
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141 @type actions: deque or iterable |
| 160 | 142 """ |
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143 if not(isinstance(actions, deque)): |
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144 actions = deque(actions) |
| 160 | 145 self.scripts[name] = Script(actions, |
| 146 self | |
| 147 ) | |
| 148 | |
| 149 def addCondition(self, condition, script_name): | |
| 150 """Adds a condition. | |
| 151 @param condition: Condition which will be evaluated | |
| 152 @param script_name: Name of the script that will be executed if the | |
| 153 condition evaluates to True. | |
| 154 """ | |
| 155 self.conditions.append((condition, script_name)) | |
| 156 | |
| 157 | |
| 158 def runScript(self, name): | |
| 159 """Runs a script with the given name | |
| 160 @param name: The name of the script""" | |
| 161 if self.scripts.has_key(name): | |
| 162 self.scripts[name].running = True | |
| 163 | |
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164 |