Mercurial > parpg-source
annotate systems/scriptingsystem.py @ 180:0d0422243490
The getGameEnvironment method of GameState will now return a globals dictionary where __builtins__ is disabled.
| author | Beliar |
|---|---|
| date | Sat, 10 Mar 2012 13:31:47 +0100 |
| parents | 230d316cc43b |
| children | 2a12e2843984 |
| rev | line source |
|---|---|
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1 # This program is free software: you can redistribute it and/or modify |
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Refactored components and began defining basic Entities and Systems.
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2 # it under the terms of the GNU General Public License as published by |
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Refactored components and began defining basic Entities and Systems.
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3 # the Free Software Foundation, either version 3 of the License, or |
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Refactored components and began defining basic Entities and Systems.
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4 # (at your option) any later version. |
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Refactored components and began defining basic Entities and Systems.
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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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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 | |
| 16 | |
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Changed "import bGrease" to "import parpg.bGrease".
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17 from parpg.bGrease import System |
| 157 | 18 |
| 19 class Script(object): | |
| 20 """Script object""" | |
| 21 | |
| 160 | 22 def __init__(self, actions, system): |
| 157 | 23 """Constructor""" |
| 24 assert(isinstance(actions, deque)) | |
| 25 self.actions = actions | |
| 160 | 26 assert(isinstance(system, ScriptingSystem)) |
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27 self.system = system |
| 160 | 28 self.reset() |
| 29 | |
| 30 def reset(self): | |
| 31 """Resets the state of the script""" | |
| 32 self.running_actions = deepcopy(self.actions) | |
| 157 | 33 self.running = False |
| 34 self.finished = False | |
| 35 self.time = 0 | |
| 36 self.wait = 0 | |
| 37 self.cur_action = None | |
| 160 | 38 |
| 157 | 39 def update(self, time): |
| 40 """Advance the script""" | |
| 41 if not self.running: | |
| 42 return | |
| 43 if self.cur_action and not self.cur_action.executed: | |
| 44 return | |
| 45 self.time += time | |
| 46 if self.wait <= self.time: | |
| 47 self.time = 0 | |
| 48 try: | |
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Moved the getEnvironment method from the ScriptingSystem to the GameState and renamed it to getGameEnvironment.
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49 globals, locals = self.system.game_state.getGameEnvironment() |
| 160 | 50 action_data = self.running_actions.popleft() |
| 51 action = self.system.actions[action_data[0]] | |
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52 action_params = eval( |
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53 action_data[1], |
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54 globals, locals |
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55 ) |
| 164 | 56 if not (isinstance(action_params, list) |
| 57 or isinstance(action_params, tuple)): | |
| 58 action_params = [action_params] | |
| 59 self.cur_action = action(self.system.world, *action_params) | |
| 160 | 60 self.wait = action_data[2] |
| 61 if len(action_data) >= 4: | |
| 62 vals = ( | |
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63 eval(action_data[4], globals, locals) |
| 160 | 64 if len(action_data) > 4 |
| 65 else () | |
| 66 ) | |
| 67 command = action_data[3] | |
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68 self.system.commands[command]( |
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69 *vals, |
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70 action=self.cur_action |
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71 ) |
| 157 | 72 else: |
| 73 self.cur_action.execute() | |
| 74 except IndexError: | |
| 75 self.finished = True | |
| 76 self.running = False | |
| 77 | |
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78 |
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79 class ScriptingSystem(System): |
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80 """ |
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81 System responsible for managing scripts attached to entities to define |
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Refactored components and began defining basic Entities and Systems.
M. George Hansen <technopolitica@gmail.com>
parents:
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82 their behavior. |
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Refactored components and began defining basic Entities and Systems.
M. George Hansen <technopolitica@gmail.com>
parents:
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83 """ |
| 157 | 84 |
| 160 | 85 def __init__(self, commands, actions): |
| 157 | 86 """Constructor""" |
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87 self.commands = commands |
| 160 | 88 self.actions = actions |
| 89 self.game_state = None | |
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90 self.reset() |
| 157 | 91 |
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92 def reset(self): |
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93 """Resets the script and condition collections""" |
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94 self.scripts = {} |
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95 self.conditions = [] |
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Added a method to the ScriptingSystem that returns the environment(locals, globals) in which scripts are run.
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96 |
| 157 | 97 def step(self, dt): |
| 98 """Execute a time step for the system. Must be defined | |
| 99 by all system classes. | |
| 100 | |
| 101 :param dt: Time since last step invocation | |
| 102 :type dt: float | |
| 103 """ | |
| 160 | 104 for condition_data in self.conditions: |
| 105 condition = condition_data[0] | |
| 106 script_name = condition_data[1] | |
| 107 if not self.scripts.has_key(script_name): | |
| 108 return | |
| 109 script = self.scripts[script_name] | |
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110 if (eval(condition, *self.game_state.getGameEnvironment()) |
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111 and not script.running): |
| 160 | 112 script.running = True |
| 113 for script in self.scripts.itervalues(): | |
| 157 | 114 assert(isinstance(script, Script)) |
| 115 if script.finished: | |
| 160 | 116 script.reset() |
| 157 | 117 elif script.running: |
| 118 script.update(dt) | |
| 160 | 119 |
| 120 def setScript(self, name, actions): | |
| 121 """Sets a script. | |
| 122 @param name: The name of the script | |
| 123 @param actions: What the script does | |
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124 @type actions: deque or iterable |
| 160 | 125 """ |
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126 if not(isinstance(actions, deque)): |
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127 actions = deque(actions) |
| 160 | 128 self.scripts[name] = Script(actions, |
| 129 self | |
| 130 ) | |
| 131 | |
| 132 def addCondition(self, condition, script_name): | |
| 133 """Adds a condition. | |
| 134 @param condition: Condition which will be evaluated | |
| 135 @param script_name: Name of the script that will be executed if the | |
| 136 condition evaluates to True. | |
| 137 """ | |
| 138 self.conditions.append((condition, script_name)) | |
| 139 | |
| 140 | |
| 141 def runScript(self, name): | |
| 142 """Runs a script with the given name | |
| 143 @param name: The name of the script""" | |
| 144 if self.scripts.has_key(name): | |
| 145 self.scripts[name].running = True | |
| 146 | |
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147 |