The #ClutterAlpha object used to drive this behaviour. A #ClutterAlpha
object binds a #ClutterTimeline and a function which computes a value
(the "alpha") depending on the time. Each time the alpha value changes
the alpha-notify virtual function is called.
Optional angle_end
angle_end?:number
The final angle to where the rotation should end.
Optional angle_start
angle_start?:number
The initial angle from whence the rotation should start.
The #ClutterAlpha object used to drive this behaviour. A #ClutterAlpha object binds a #ClutterTimeline and a function which computes a value (the "alpha") depending on the time. Each time the alpha value changes the alpha-notify virtual function is called.