class Magnetic : ActionRole() {

    var force = 0
    val delta = Vector2()
    val angle = Angle()

    override fun begin() {
        super.begin()
        force = Options.instance.magneticStrength
    }

    override fun createAction() : Action {
        val seconds = 0.8
        return (
            Colorize( actor.color, seconds, Color( 0.8, 0.6, 0.6 ), Eases.easeIn ) then
            Colorize( actor.color, seconds, Color( 1, 1, 1 ), Eases.easeOut )
        ).forever()
    }

    override fun tick() {
        super.tick()
        val ship = Play.instance.ship
        if (ship == null) return

        delta.setMinus( ship.actor.position, actor.position )
        val distance = delta.length()
        delta.setMagnitude( force / distance / distance )
        ship.velocity += delta
    }

}