class Droplet : ActionRole {

    val velocity = Vector2()

    override fun begin() {
        super.begin()
        actor.position.y -= 20
        velocity.x = Rand.plusMinus( 1.0 )
        velocity.y = Rand.between( 1.0, 2.0 )
    }

    override fun tick() {
        super.tick()
        velocity.y -= 0.05
        actor.position += velocity
    }

    override fun createAction() = Fade( actor.color, 3, 0 ).then( Kill( actor ) )
}

class BigDroplet : ActionRole {

    val velocity = Vector2()

    override fun begin() {
        super.begin()
        velocity.x = Rand.plusMinus( 2.0 )
        velocity.y = Rand.plusMinus( 4.0 )
    }

    override fun tick() {
        super.tick()
        velocity.y -= 0.05
        actor.position += velocity
    }

    override fun createAction() = Fade( actor.color, 4, 0 ).then( Kill( actor ) )

}