Hello everyone, I'm currently working through this example project Exploring object tracking with ARKit to learn how to use Object Tracking with visionOS. I was able to modify the example project to overlay a different model onto the detected object. However, with the example code, I'm only able to track 1 instance of the trained object at a time. I'm wondering if there is a way to track multiple instances of 1 object? For example, I have a usdz model of a box, then trained that box for object tracking, I'm able to overlay a model of a chair over that box once it's detected. But now, I have multiple copies of that same box, and I want to arrange them so that when I wear the Vision Pro, I can see the chairs arranged however I want. I'm still new to visionOS development, so I'm not sure if there's a way to accomplish that by just training 1 object and having copies of it. If it helps, this is my current modification to overlay a virtual object ontop of a detected object. func loadReferenceObjects() async -> [ReferenceObject] { // Get a list of all reference object files in the app's main bundle and attempt to load each. var referenceObjectFiles: [String] = [] if let resourcesPath = Bundle.main.resourcePath { print("resource path: \(resourcesPath)") try? referenceObjectFiles = FileManager.default.contentsOfDirectory(atPath: resourcesPath).filter { $0.hasSuffix(".referenceobject") } } await withTaskGroup(of: Void.self) { group in for file in referenceObjectFiles { let objectURL = Bundle.main.bundleURL.appending(path: file) group.addTask { // get the file name let fileNameWithoutExtension = (file as NSString).deletingPathExtension // load each ref objs as task await self.loadSingleReferenceObject(url: objectURL, fileName: fileNameWithoutExtension) } } } return self.referenceObjects } // Private helper method to load a single object // and assign entity to it. private func loadSingleReferenceObject(url: URL, fileName: String) async { var referenceObject: ReferenceObject do { print("Loading reference object from \(url)") // Load the file as a `ReferenceObject` - this can take a while for larger objects. try await referenceObject = ReferenceObject(from: url) } catch { fatalError("Failed to load reference object with error \(error)") } // add the ref obj to the ref objs array self.referenceObjects.append(referenceObject) // entity with each file var model: Entity = Entity() // add entity according to the file name switch fileName { // Box1 ref obj binds with Chair1 case "Box1": // try to load the model do { try await model = Entity(named: "chair1", in: realityKitContentBundle) } catch { print("Failed to load chair1") } // Box2 ref obj binds with Chair2 case "Box2": // try to load the model do { try await model = Entity(named: "chair2", in: realityKitContentBundle) } catch { print("Failed to load chair2") } default: print("no model associated with this file name: \(fileName)") break } // map entity to ref objs usdzPerReferenceObject[referenceObject.id] = model } Any help or suggestions would be greatly appreciated. Thank you.

Hi everyone, I'm new to Swift and VisionOS development in general, so please go easy on me. Currently, I'm looking at a sample project from a WWDC23 session that uses RealityKit and ARKit to add a cube entity to a scene via tap gesture. The link to the sample project is here. Instead of adding a cube, I changed the code to adding a usdz model instead. Here is my code: func add3DModel(tapLocation: SIMD3<Float>) { let placementLocation = tapLocation + SIMD3<Float>(0, 0.1, 0) guard let entity = try? Entity.load(named: "cake-usdz", in: realityKitContentBundle) else { logger.error("failed to load 3D model") return } // calculate the collision box (the boundaries) let entitySize = entity.visualBounds(relativeTo: nil) let width = entitySize.max.x - entitySize.min.x let height = entitySize.max.y - entitySize.min.y let depth = entitySize.max.z - entitySize.min.z // logger.debug("width: \(width), height: \(height), depth: \(depth)") // set collision shape let collisionShape = ShapeResource.generateBox(size: SIMD3<Float>(width, height, depth)) entity.components.set(CollisionComponent(shapes: [collisionShape])) // set the position and input types to indirect entity.setPosition(placementLocation, relativeTo: nil) entity.components.set(InputTargetComponent(allowedInputTypes: .indirect)) let material = PhysicsMaterialResource.generate(friction: 0.8, restitution: 0.0) entity.components.set(PhysicsBodyComponent( shapes: [collisionShape], mass: 1.0, material: material, mode: .dynamic )) contentEntity.addChild(entity) } This works fine so far. But when I tried to add a Drag Gesture to drag the added entity around. There are weird glitches happening with the model. The model jumped up and down, and even rotating around it self sometimes. Below is my code for Drag Gesture. I placed it directly below the code for Spatial Tap Gesture in the sample project. .gesture(DragGesture().targetedToAnyEntity().onChanged({ value in let targetedEntity = value.entity targetedEntity.position = value.convert(value.location3D, from: .local, to: .scene) })) At first, I thought my code was wrong. But after looking around and removing the PhysicsBodyComponent for the added model, the entity was moving as intended while dragging. I can't figure out a solution to this. Could anyone help me? I'm currently on Xcode 16 beta 2, and visionOS 2.0. Because I'm on Beta, I'm unsure if this is a bug or if I just missed something. Thank you.