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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: targetcamera.py,v 1.8 2005/07/21 15:07:11 mbaas Exp $
-
- ## \file targetcamera.py
- ## Contains the TargetCamera class.
-
- """This module contains the TargetCamera class."""
-
- from Interfaces import *
- import protocols
- import slots
- from cgtypes import *
- from math import pi
- from worldobject import WorldObject
- from scene import getScene
- import camerabase, lookat
- import sys
- import _core
-
- # TargetCamera
- class TargetCamera(camerabase.CameraBase):
- """A camera object that always looks at a particular target.
- """
-
- protocols.advise(instancesProvide=[ISceneItem, ICamera])
-
- def __init__(self,
- name = "TargetCamera",
- fov = 45.0,
- target = vec3(0,0,0),
- roll = 0.0,
- up = None,
- fstop = 0,
- focallength = 0,
- **params):
-
- camerabase.CameraBase.__init__(self, name=name, **params)
-
- target = vec3(target)
-
- # FOV
- self.fov_slot = slots.DoubleSlot(fov)
- self.addSlot("fov", self.fov_slot)
-
- # Target
- self.target_slot = slots.Vec3Slot(target)
- self.addSlot("target", self.target_slot)
-
- # Roll
- self.roll_slot = slots.DoubleSlot(roll)
- self.addSlot("roll", self.roll_slot)
-
- # Up
- self.up_slot = slots.Vec3Slot()
- self.addSlot("up", self.up_slot)
- if up==None:
- self.up_slot.setValue(getScene().up)
- else:
- self.up_slot.setValue(vec3(up))
-
- self._lookat = lookat.LookAt()
- self._lookat.name = "TargetCamera_LookAt"
- self._lookat.output_slot.connect(self.rot_slot)
- self.pos_slot.connect(self._lookat.pos_slot)
- self.target_slot.connect(self._lookat.target_slot)
- self.roll_slot.connect(self._lookat.roll_slot)
- self.up_slot.connect(self._lookat.up_slot)
-
- # fstop
- self.fstop_slot = slots.DoubleSlot(fstop)
- self.addSlot("fstop", self.fstop_slot)
-
- # focal length
- self.focallength_slot = slots.DoubleSlot(focallength)
- self.addSlot("focallength", self.focallength_slot)
-
-
- def destroy(self):
- # self.fov_slot.setController(None)
- # self.target_slot.setController(None)
- # self._lookat.pos_slot.setController(None)
- # self._lookat.target_slot.setController(None)
- # self.transform_slot.setController(None)
- # self.pos_slot.setController(None)
- # self.rot_slot.setController(None)
- # self.scale_slot.setController(None)
- del self.fov_slot
- del self.target_slot
- del self._lookat.output_slot
- del self._lookat.pos_slot
- del self._lookat.target_slot
- del self.fstop_slot
- del self.focallength_slot
-
- # projection
- def projection(self, width, height, near, far):
- return mat4().perspective(self.fov, float(width)/height, near, far)
-
- # viewTransformation
- def viewTransformation(self):
- return self.worldtransform.inverse()
-
- ## protected:
-
- exec slots.slotPropertyCode("fstop")
- exec slots.slotPropertyCode("focallength")
- exec slots.slotPropertyCode("roll")
- exec slots.slotPropertyCode("up")
-
- # "fov" property...
-
- def _getFOV(self):
- """Return the current field of view.
-
- This method is used for retrieving the \a fov property.
-
- \return Field of view in angles (\c float)
- """
- return self.fov_slot.getValue()
-
- def _setFOV(self, fov):
- """Set the field of view.
-
- This method is used for setting the \a fov property.
-
- \param fov (\c float) Field of view in angles (0-180)
- """
- fov = float(fov)
- if fov<0:
- fov = 0.0
- if fov>180:
- fov = 180.0
- self.fov_slot.setValue(fov)
-
- fov = property(_getFOV, _setFOV, None, "Field of view (in angles)")
-
- # "target" property...
-
- def _getTarget(self):
- """Return the current target position.
-
- This method is used for retrieving the \a target property.
-
- \return Target position (\c vec3)
- """
- return self.target_slot.getValue()
-
- def _setTarget(self, pos):
- """Set a new target position.
-
- This method is used for setting the \a target property.
-
- \param pos (\c vec3) Target position
- """
- pos = vec3(pos)
- self.target_slot.setValue(pos)
-
- target = property(_getTarget, _setTarget, None, "Target position")
-