/**
 * Bounces actors around the screen.
 */
class Bounce : AbstractRole() {

    var speed = Vector2(1, 1)
    var scale = 1.1
    var ticks = 0

    override fun begin() {
        super.begin()
        ticks = 0
    }

    override fun tick() {
    
        val viewRect = Game.instance.scene.findView("main").rect
        if (ticks < 1400) {
            speed *= 1.001
            ticks++
        }
        actor.position += speed

        val rect = actor.appearance.worldRect()
        if ((rect.left < 0.0 && speed.x < 0) || (rect.right >= viewRect.right && speed.x > 0)) {
            speed.x = -speed.x
            actor.scale *= scale
        }
        if ((rect.top >= viewRect.top && speed.y > 0) || (rect.bottom < 0.0 && speed.y < 0)) {
            speed.y = -speed.y
            //actor.scale = actor.scale.mul(scale)
        }
        // Start shrinking instead of growing.
        if (scale > 1.0 && rect.width > 300) {
            scale = 1 / scale
        }
        
    }
}