Swift Playgrounds AR App Starter Code

gistfile1.txt

import ARKit
import Combine
import RealityKit
import SwiftUI

@main
struct MyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

struct ContentView: View {
    var body: some View {
        ARViewContainer()
    }
}

struct ARViewContainer: UIViewRepresentable {
    
    func makeUIView(context: Context) -> ARView {
        
        let arView = context.coordinator.arView
        
        let primeAnchor = context.coordinator.primeAnchor
        arView.scene.anchors.append(primeAnchor)
        
        return arView
        
    }
    
    func updateUIView(_ uiView: ARView, context: Context) {}
    
    func makeCoordinator() -> Coordinator {
        Coordinator(arView: ARView(frame: .zero), 
                    primeAnchor: AnchorEntity(plane: .horizontal))
    }
    
    class Coordinator: NSObject, ARSessionDelegate {
        var primeAnchor: AnchorEntity
        var arView: ARView
        
        var cancellables = Set<AnyCancellable>()
        
        init(arView: ARView, primeAnchor: AnchorEntity) {
            self.arView = arView
            self.primeAnchor = primeAnchor
            // Assuming you have a Star.reality file in your Resources area
            let realityFile = Bundle.main.url(forResource: "Star", withExtension: "reality")!
            
            super.init()
            
            Entity.loadAnchorAsync(contentsOf: realityFile)
                .sink(receiveCompletion: { (loadCompletion) in
                if case let .failure(error) = loadCompletion {
                    print(error.localizedDescription)
                }
            }, receiveValue: { [weak self] (entity) in
                self?.primeAnchor.addChild(entity)
            }).store(in: &cancellables)
        }
    }
}