class Umbrella : Fragile(), Draggable, Scalable {

    @Attribute
    val angle = Angle()

    var umbrellaTop: UmbrellaTop

    override fun activated() {
        val topHalf = actor.createChild("topHalf").apply {
            scaleXY = actor.scaleXY
            direction.radians += angle.radians
        }
        umbrellaTop = topHalf.role as UmbrellaTop
        umbrellaTop.umbrella = this

        val joint = TicklePinJoint(actor, umbrellaTop.actor, actor.position)
        joint.limitRotation(Angle.degrees(-60.0), Angle.degrees(60.0))
    }
    fun createJoint() {
        
    }

    override fun mass(): float {
        return actor.body.mass // + umbrellaTop.actor.body.mass
    }

    override fun scale( by : Vector2 ) {
        actor.scale *= by
        // No need to scale joints, because they are at 0,0
        //actor.body.scaleJoints( by )
        umbrellaTop.actor.scale *= by
        //umbrellaTop.actor.body.scaleJoints( by )
    }

}

class UmbrellaTop : Scenery, Draggable, Scalable {

    var umbrella : Umbrella = null

    override fun scale( by : Vector2 ) {
        umbrella.scale( by )
    }

    override fun mass() = umbrella.mass()
}