scenekit.swift

//
// Thanks for offering to help! This is where I'm at now.
// It's an incredibly simple scene, but I'm just starting to 
// poke around with Scenekit.
//
// The TL;DR of what I'm trying to do is:
// Having a moon in the middle of the view
// User CAN rotate moon (currently working)
// User CANNOT pinch to zoom (currently working)
// User CANNOT reposition the moon within the view (currently NOT WORKING)
//
import SwiftUI
import SceneKit

struct SceneKitThings: View {
    var body: some View {
      // Set up your Scene here (replace the placeholder with your scene setup)
      let scene = SCNScene(named: "Moon.usdz")!

      // Use the MySceneViewWrapper and pass your SCNScene as a parameter
      MySceneViewWrapper(scene: scene)
          .edgesIgnoringSafeArea(.all)
          .frame(maxWidth: UIScreen.main.bounds.width, maxHeight: UIScreen.main.bounds.height / 2)
    }
}

struct MySceneViewWrapper: UIViewRepresentable {
    let scene: SCNScene // Pass your SCNScene as a parameter

    func makeUIView(context: Context) -> SCNView {
        let sceneView = SCNView()
        sceneView.scene = scene // Set the SCNScene to the SCNView
        sceneView.autoenablesDefaultLighting = true // Enable default lighting
        sceneView.allowsCameraControl = true // Enable camera control for rotation

        // Disable pinch-to-zoom by removing the pinch gesture recognizer
        sceneView.gestureRecognizers?.removeAll { $0 is UIPinchGestureRecognizer }

        return sceneView
    }

    func updateUIView(_ uiView: SCNView, context: Context) {
        // Update your Scene here if needed
    }
}