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# The Original Code is the Python Computer Graphics Kit.
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# The Initial Developer of the Original Code is Matthias Baas.
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# $Id: freecamera.py,v 1.6 2005/05/12 12:58:29 mbaas Exp $
## \file freecamera.py
## Contains the FreeCamera class.
"""This module contains the FreeCamera 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
import sys
import _core
# FreeCamera
class FreeCamera(camerabase.CameraBase):
"""A camera object that is free to move and rotate.
"""
protocols.advise(instancesProvide=[ISceneItem, ICamera])
def __init__(self,
name = "FreeCamera",
target = None,
fov = 45.0,
fstop = 0,
focallength = 0,
**params):
camerabase.CameraBase.__init__(self, name=name, **params)
# FOV
self.fov_slot = slots.DoubleSlot(fov)
self.addSlot("fov", self.fov_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)
# Initial targeting
if target!=None:
up = getScene().up
self.transform = mat4().lookAt(self.pos, vec3(target), up)
def protocols(self):
return [ISceneItem, IComponent, IWorldObject, ICamera]
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.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")
# "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)")
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