def METHOD_NAME(self):
    """Restore the camera to the initial position
    and sets it's ``dirty`` attribute in False and ``once`` in true.
    If you use the camera, for a while and you want to stop using it
    call this method.
    """
    width, height = director.get_window_size()
    # tuple (x,y,z) that says where is the eye of the camera.
    # used by ``gluLookAt()``
    self._eye = Point3(width / 2.0, height / 2.0, self.get_z_eye())
    # tuple (x,y,z) that says where is pointing to the camera.
    # used by ``gluLookAt()``
    self._center = Point3(width / 2.0, height / 2.0, 0.0)
    # tuple (x,y,z) that says the up vector for the camera.
    # used by ``gluLookAt()``
    self._up_vector = Point3(0.0, 1.0, 0.0)
    #: whether or not the camera is 'dirty'
    #: It is dirty if it is not in the original position
    self.dirty = False
    #: optimization. Only renders the camera once
    self.once = False