class Follower : ActionRole {

    @Attribute( isActorName=true )
    var follow = ""

    override fun createAction() : Action {
        val followA = actor.stage.findActorByName( follow )
        return if (followA == null) {
            null
        } else {
            val offset = actor.position - followA.position
            Follow( actor.position, followA.position, offset, followA.direction )
        }
    }

}