class Part( val parent : Movable, val dx : int, val dy : int ) : Movable {

    init {
        actor = parent.actor
    }

    fun reoccupy() {
        parent.square.neighbour( dx, dy ).addOccupant( this )
    }

    override fun canPush( direction : int, speed : int, strength  : int ) : boolean = parent.canPush( direction, speed, strength )

    override fun push( direction : int, speed : int ) {
        parent.push( direction, speed )
    }

    override fun movement() : Movement = parent.movement()

    override fun isPlayer() : boolean = parent.isPlayer()

    override fun isDeadly() : boolean = parent.isDeadly()

    override fun isMoving() : boolean = parent.isMoving()

    override fun squashable( direction : int ) : boolean = parent.squashable( direction )
    
    override fun collectable() : boolean = parent.collectable()

    override fun rounded( direction : int ) : boolean = parent.rounded( direction )

    override fun invading( movement :  Movement ) {
        if ( movement.item != parent ) {
            parent.invading( movement )
        }
    }

    override fun invaded( movement : Movement ) : boolean {
        if ( movement.item == parent ) return true
        return parent.invaded( movement )
    }

    override fun kill() {
        parent.kill()
    }

    override fun toString() = "Part $dx,$dy  of $parent"
}