/**
    Bounces off the sides of the scene
*/

class Bounce : Circular {

    override fun tick() {

        // We can find the "preferred" size of the game window from the GameInfo class
        // NOTE, if we allow the window to be resized, then this is NOT a good way to find the bounds of the game area!
        val gameInfo = Game.instance.resources.gameInfo

        // Find the axis aligned rectangle of the Actor's Appearance.
        // Note, if the Actor is rotated, then this is NOT a good way to test if the Actor has strayed outside of
        // game area.
        val rect = actor.appearance.worldRect()


        if ( (rect.left < 0  && velocity.x < 0) || (rect.right > gameInfo.width && velocity.x > 0) ) {
            //println( "Bounced X" )
            velocity.x = - velocity.x
        }


        //println( "${rect.top} vs ${gameInfo.height} ... $velocity.y" )
        if ( (rect.bottom < 0 && velocity.y < 0) || (rect.top > gameInfo.height && velocity.y > 0) ) {
            //println( "Bounced Y" )
            velocity.y = - velocity.y
        }

        super.tick()
    }

}