class RotatingPlayer : Player{

    @Attribute
    var rotationPeriod = 4.0

    /**
      * Number of seconds after which the direction of rotation can be changed.
      */
    @Attribute
    var allowFlipAfter = 1.0

    var rot = 360.0

    var reverseI : Input

    override fun begin() {
        super.begin()
        reverseI = Resources.instance.inputs.find( "reverse" )
    }

    override fun animationAction() : Action {
        // Do half a turn, without allowing the direction to change.
        return TurnBy( actor.direction, rotationPeriod, Angle.degrees(rot) ).forever() and
            ( Delay( allowFlipAfter ) then this:>checkFlip )
                
    }

    fun checkFlip() : bool {
        if (reverseI.isPressed() && Game.instance.director is Play) {
            rot = -rot
            replaceAction( createRealAction() )
        }
        return false
    }

}