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Diffstat (limited to 'elements/callbacks.py')
| -rwxr-xr-x | elements/callbacks.py | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/elements/callbacks.py b/elements/callbacks.py deleted file mode 100755 index 5402869..0000000 --- a/elements/callbacks.py +++ /dev/null @@ -1,122 +0,0 @@ -""" -This file is part of the 'Elements' Project -Elements is a 2D Physics API for Python (supporting Box2D2) - -Copyright (C) 2008, The Elements Team, <elements@linuxuser.at> - -Home: http://elements.linuxuser.at -IRC: #elements on irc.freenode.org - -Code: http://www.assembla.com/wiki/show/elements - svn co http://svn2.assembla.com/svn/elements - -License: GPLv3 | See LICENSE for the full text -This program is free software: you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation, either version 3 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program. If not, see <http://www.gnu.org/licenses/>. -""" -from locals import * -from elements import box2d - -class CallbackHandler: - # List of contact callbacks and shapes to start them - sorted by type for quicker access - # Callbacks are saved as callbacks[callback_type][[function, parameters], ...] - callbacks = {} - - def __init__(self, parent): - self.parent = parent - - # init callback dict to avoid those slow try - # (especially for self.get, as it is called *often*) - for i in xrange(10): - self.callbacks[i] = [] - - def add(self, callback_type, callback_handler, *args): - """ Users can add callbacks for certain (or all) collisions - - Parameters: - callback_type ......... CALLBACK_CONTACT (nothing else for now) - callback_handler ...... a callback function - args (optional) ....... a list of parameters which can be used with callbacks.get - - Return: - callback_id ... used to remove a callback later (int) - """ - # Create contact listener if required - if callback_type in [CALLBACK_CONTACT_ADD, CALLBACK_CONTACT_PERSIST, CALLBACK_CONTACT_REMOVE]: - if self.parent.klistener == None: - self.parent.klistener = kContactListener(self.get) - self.parent.world.SetContactListener( self.parent.klistener ) - print "* kContactListener added" - - # Get callback dict for this callback_type - c = self.callbacks[callback_type] - - # Append to the Callback Dictionary - c.append([callback_handler, args]) - self.callbacks[callback_type] = c - - # Return Callback ID - # ID = callback_type.callback_index (1...n) - return "%i.%i" % (callback_type, len(c)) - - def get(self, callback_type): - return self.callbacks[callback_type] - - def start(self, callback_type, *args): - callbacks = self.get(callback_type) - for c in callbacks: - callback, params = c - callback() - -class kContactListener(box2d.b2ContactListener): - def __init__(self, get_callbacks): - # Init the Box2D b2ContactListener - box2d.b2ContactListener.__init__(self) - - # Function to get the current callbacks - self.get_callbacks = get_callbacks - - def check_contact(self, contact_type, point): - # Checks if a callback should be started with this contact point - contacts = self.get_callbacks(contact_type) - - # Step through all callbacks for this type (eg ADD, PERSIST, REMOVE) - for c in contacts: - callback, bodylist = c - if len(bodylist) == 0: - # Without bodylist it's a universal callback (for all bodies) - callback(point) - - else: - # This is a callback with specified bodies - # See if this contact involves one of the specified - b1 = str(point.shape1.GetBody()) - b2 = str(point.shape2.GetBody()) - for s in bodylist: - s = str(s) - if b1 == s or b2 == s: - # Yes, that's the one :) - callback(point) - - def Add(self, point): - """Called when a contact point is created""" - self.check_contact(CALLBACK_CONTACT_ADD, point) - - def Persist(self, point): - """Called when a contact point persists for more than a time step""" - self.check_contact(CALLBACK_CONTACT_PERSIST, point) - - def Remove(self, point): - """Called when a contact point is removed""" - self.check_contact(CALLBACK_CONTACT_REMOVE, point) - |