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- # ***** BEGIN LICENSE BLOCK *****
- # Version: MPL 1.1/GPL 2.0/LGPL 2.1
- #
- # The contents of this file are subject to the Mozilla Public License Version
- # 1.1 (the "License"); you may not use this file except in compliance with
- # the License. You may obtain a copy of the License at
- # http://www.mozilla.org/MPL/
- #
- # Software distributed under the License is distributed on an "AS IS" basis,
- # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- # for the specific language governing rights and limitations under the
- # License.
- #
- # The Original Code is the Python Computer Graphics Kit.
- #
- # The Initial Developer of the Original Code is Matthias Baas.
- # Portions created by the Initial Developer are Copyright (C) 2004
- # the Initial Developer. All Rights Reserved.
- #
- # Contributor(s):
- #
- # Alternatively, the contents of this file may be used under the terms of
- # either the GNU General Public License Version 2 or later (the "GPL"), or
- # the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- # in which case the provisions of the GPL or the LGPL are applicable instead
- # of those above. If you wish to allow use of your version of this file only
- # under the terms of either the GPL or the LGPL, and not to allow others to
- # use your version of this file under the terms of the MPL, indicate your
- # decision by deleting the provisions above and replace them with the notice
- # and other provisions required by the GPL or the LGPL. If you do not delete
- # the provisions above, a recipient may use your version of this file under
- # the terms of any one of the MPL, the GPL or the LGPL.
- #
- # ***** END LICENSE BLOCK *****
- # $Id: autocam.py,v 1.1.1.1 2004/12/12 14:30:54 mbaas Exp $
-
- ## \file autocam.py
- ## Contains the AutoCam class.
-
- """This module contains the AutoCam class."""
-
- from Interfaces import *
- import protocols
- import slots
- import _core
- from eventmanager import eventManager
- from scene import getScene
- import events
- from cgtypes import *
- from component import *
-
-
- # AutoCam
- class AutoCam(Component):
- """AutoCam
- """
-
- protocols.advise(instancesProvide=[ISceneItem])
-
- def __init__(self, name="AutoCam"):
- Component.__init__(self, name=name)
-
- # Input
- self.input_slot = slots.Vec3Slot()
- self.addSlot("input", self.input_slot)
-
- # Output
- self.output_slot = slots.Vec3Slot()
- self.addSlot("output", self.output_slot)
-
- self.accel_factor = 0.5
- self.out_offset = vec3(0,0,0)
-
- self.out = vec3(0,0,0)
- self.out_velocity = vec3(0,0,0)
-
- eventManager().connect(events.STEP_FRAME, self)
-
- def protocols(self):
- return [ISceneItem, IComponent, IWorldObject, ICamera]
-
- # def destroy(self):
- # del self.fov_slot
- # del self.target_slot
-
- def onStepFrame(self):
- dt = getScene().timer().timestep
- diff = self.input-self.out
- if (diff.length()<1.0):
- a = -0.75*self.out_velocity
- else:
- a = self.accel_factor*(self.input-self.out)
- self.out_velocity += dt*a
- self.out = self.out + dt*self.out_velocity
- self.output = self.out+self.out_offset
-
- ## protected:
-
- # "input" property...
- exec slotPropertyCode("input")
-
- # "output" property...
- exec slotPropertyCode("output")
-
-
-
-