Scene Kit View with moving Object

Question

How can I show a moving 3D object in my Simple view Application using scene kit view with swift 4.

For example bee.glb file in windows, I am using these four files:

1. body.bmp
2. body.jpg
3. volkeswagon-vw-beetle.mtl

4. volkeswagon-vw-beetle.obj

   import UIKit
   import SceneKit
   import ARKit
   
   class ViewController: UIViewController {
   
   @IBOutlet weak var sceneView: SCNView!
   
   override func viewDidLoad() {
   super.viewDidLoad()
   
   
   // 1: Load .obj file
   let scene = SCNScene(named: "volkeswagon-vw-beetle.obj")
   
   // 2: Add camera node
   let cameraNode = SCNNode()
   cameraNode.camera = SCNCamera()
   // 3: Place camera
   cameraNode.position = SCNVector3(x: 0, y: 10, z: 35)
   // 4: Set camera on scene
   scene!.rootNode.addChildNode(cameraNode)
   
   // 5: Adding light to scene
   let lightNode = SCNNode()
   lightNode.light = SCNLight()
   lightNode.light?.type = .omni
   lightNode.position = SCNVector3(x: 0, y: 10, z: 35)
   scene?.rootNode.addChildNode(lightNode)
   
   // 6: Creating and adding ambien light to scene
   let ambientLightNode = SCNNode()
   ambientLightNode.light = SCNLight()
   ambientLightNode.light?.type = .ambient
   ambientLightNode.light?.color = UIColor.darkGray
   scene?.rootNode.addChildNode(ambientLightNode)
   
   // Allow user to manipulate camera
   sceneView.allowsCameraControl = true
   
   // Show FPS logs and timming
    sceneView.showsStatistics = true
   
   // Set background color
   sceneView.backgroundColor = UIColor.white
   
   // Allow user translate image
   sceneView.cameraControlConfiguration.allowsTranslation = false
   
   // Set scene settings
   sceneView.scene = scene
   }
   
   }
   

The output is:

"3DVideo[6430:105708] [SceneKit] Error: Physically based lighting model is not supported by the OpenGL renderer, using Phong instead (3) 2019-09-02 03:29:13.297536-0700 3DVideo[6430:105708] [SceneKit] Error: Physically based lighting model is not supported by the OpenGL renderer, using Phong instead (2) 2019-09-02 03:29:13.308381-0700 3DVideo[6430:105708] [SceneKit] Error: Physically based lighting model is not supported by the OpenGL renderer, using Phong instead"

Answer 1

i resolve this issue by Just change my file extension from .obj to .dae.Because obj file has no any animation