iOS -如何将sceneKit节点对象添加到前置相机的顶部。不是ArKit

import UIKit
import SceneKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let sceneView = SCNView(frame: view.bounds)
        view.addSubview(sceneView)
        
        let scene = SCNScene()
        sceneView.scene = scene
    }
}

let node = SCNNode()
scene.rootNode.addChildNode(node)

guard let captureDevice = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .front) else {
    fatalError("无法获取前置相机设备")
}

let captureSession = AVCaptureSession()
let captureDeviceInput = try! AVCaptureDeviceInput(device: captureDevice)
captureSession.addInput(captureDeviceInput)

let captureVideoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
captureVideoPreviewLayer.frame = view.bounds
view.layer.insertSublayer(captureVideoPreviewLayer, at: 0)

let cameraNode = SCNNode()
cameraNode.camera = SCNCamera()
node.addChildNode(cameraNode)

let cameraTransform = SCNMatrix4MakeTranslation(0, 0, -1) // 调整相机位置
cameraNode.transform = cameraTransform