class Ship : Item {

    override fun activated() {
        super.activated()
        // Add extra solid pieces, so that you cannot walk through the legs of the ship.
        (actor.createChild( "leg" ).role as Item).move(  1, -1 )
        (actor.createChild( "leg" ).role as Item).move( -1, -1 )
    }

    fun launch() {

        val velocity = Vector2( 0, 1.0 )
        val acceleration = Vector2( 0, 16.0 )
        actor.event("launch")
        replaceAction(
            (
                this:>scrollUp.action() and
                Move(actor.position, velocity) and
                Accelerate( velocity, acceleration ) and
                this:>createFlame.action()
            ).forSeconds(14) thenOnce
                Game.instance:>startScene<String>.curry("menu")
        )
    }

    fun scrollUp() : bool {
        Play.instance.mainView.worldFocal.y += 1
        return false
    }

    fun createFlame() : bool {
        for (i in 0 until 5) {
            actor.createChild("flame").zOrder = actor.zOrder - 1
        }
        return false
    }
}