@IBOutlet var sceneView: ARSCNView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Set the view's delegate
    sceneView.delegate = self

    // Show statistics such as fps and timing information
    sceneView.showsStatistics = true

    // Create a new scene
    let scene = SCNScene()

    // Set the scene to the view
    sceneView.scene = scene
}

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    // Create a session configuration
    let configuration = ARWorldTrackingConfiguration()

    // Object Detection
    configuration.detectionObjects = ARReferenceObject.referenceObjects(inGroupNamed: "FlowerObjects", bundle: Bundle.main)!

    // Run the view's session
    sceneView.session.run(configuration)
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    // Pause the view's session
    //sceneView.session.pause()
}

// MARK: - ARSCNViewDelegate

func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {

    let node = SCNNode()

    if let objectAnchor = anchor as? ARObjectAnchor {
        let plane = SCNPlane(width: CGFloat(objectAnchor.referenceObject.extent.x * 1.0), height: CGFloat(objectAnchor.referenceObject.extent.y * 0.7))

        plane.cornerRadius = plane.width / 8

        let spriteKitScene = SKScene(fileNamed: "ProductInfo")

        plane.firstMaterial?.diffuse.contents = spriteKitScene
        plane.firstMaterial?.isDoubleSided = true
        plane.firstMaterial?.diffuse.contentsTransform = SCNMatrix4Translate(SCNMatrix4MakeScale(1, -1, 1), 0, 1, 0)

        let planeNode = SCNNode(geometry: plane)
        planeNode.position = SCNVector3Make(objectAnchor.referenceObject.center.x, objectAnchor.referenceObject.center.y + 0.5, objectAnchor.referenceObject.center.z) //y was 0.25

        node.addChildNode(planeNode)

    }

    return node
}


func session(_ session: ARSession, didFailWithError error: Error) {
    // Present an error message to the user

}

func sessionWasInterrupted(_ session: ARSession) {
    // Inform the user that the session has been interrupted, for example, by presenting an overlay

}

func sessionInterruptionEnded(_ session: ARSession) {
    // Reset tracking and/or remove existing anchors if consistent tracking is required

}