I'm trying to understand how Apple handles dragging windows around in an immersive space. 3d Gestures seem to be only half of the solution in that they are great if you're standing still and want to move the window an exaggerated amount around the environment, but if you then start walking while dragging, the amplified gesture sends the entity flying off into the distance. It seems they quickly transition from one coordinate system to another depending on if the user is physically moving. If you drag a window and start walking the movement suddenly matches your speed. When you stop moving, you can push and pull the windows around again like a super hero. Am I missing something obvious in how to copy this behavior? Hello world, which uses the 3d gesture has the same problem. You can move the world around but if you walk with it, it flies off. Are they tracking the head movement and if it's moved more than a certain amount it uses that offset instead? Is there anything out of the box that can do this before I try and hack my own solution?

I'm building a visionOS app which loads a Reality Composer scene with a large number of models. The app includes several of these scenes, and allows the user to switch between them. Because the scenes have a large number of models, I want to unload the currently loaded scene before loading a different one. So far I have been unable to reclaim all of the used memory by removing the entities from the scene. I've made a few small changes to the Mixed Immersive app template which demonstrate this behavior which I've included below (apparently I'm unable to upload a zip file with the entire project). Using just the two spheres included in the reality kit content the leaked memory is fairly small, but if you add a couple larger models to the scene (I was able to easily find free ones online) then the memory leak becomes much more obvious. When the immersive space is initially opened, I'm seeing roughly 44MB of used memory (as shown in the Xcode Debug navigator). Each time I tap the "Load Models" and then "Unload Models" buttons, the memory use decreases but does not get back down to the initial amount. Subsequent loads and unloads will continue to increase the used memory (the amount of increase will depend on the models that you add to the scene). Also note that I've seen similar memory increases when dynamically creating the entities. Inside ViewModel.loadModels I've included some commented out code that dynamically creates entities instead of loading a Reality Composer scene. Is there a way to fully reclaim the used memory? I've tried many different ways to clear the RealityKit entities but so far have been unsuccessful. struct RKMemTestApp: App { private var viewModel = ViewModel() var body: some Scene { WindowGroup { ContentView() .environment(viewModel) } ImmersiveSpace(id: "ImmersiveSpace") { ImmersiveView() .environment(viewModel) } } } Add this above the body in ContentView: @Environment(ViewModel.self) private var viewModel The ContentView body should be: VStack { Toggle("Show ImmersiveSpace", isOn: $showImmersiveSpace) .font(.title) .frame(width: 360) .padding(24) .glassBackgroundEffect() Button("Load Models") { viewModel.loadModels() } Button("Unload Models") { viewModel.unloadModels() } } ImmersiveView: struct ImmersiveView: View { @Environment(ViewModel.self) private var viewModel var body: some View { RealityView { content in if let rootEntity = viewModel.rootEntity { content.add(rootEntity) } } update: { content in if viewModel.rootEntity == nil && !content.entities.isEmpty { content.entities.removeAll() } else if let rootEntity = viewModel.rootEntity, content.entities.isEmpty { content.add(rootEntity) } } } } ViewModel: import Foundation import Observation import RealityKit import RealityKitContent @Observable class ViewModel { var rootEntity: Entity? init() { } func loadModels() { Task { if let scene = try? await Entity(named: "Immersive", in: realityKitContentBundle) { Task { @MainActor in if rootEntity == nil { rootEntity = Entity() } rootEntity!.addChild(scene) } } } /*if rootEntity == nil { rootEntity = Entity() } for _ in 0..<1000 { let mesh = MeshResource.generateSphere(radius:0.1) let material = SimpleMaterial(color: .blue, roughness: 0, isMetallic: true) let entity = ModelEntity(mesh: mesh, materials: [material]) entity.position = [Float.random(in: 0.0..<1.0), Float.random(in: 0.5..<1.5), -Float.random(in: 1.5..<2.5)] rootEntity!.addChild(entity) }*/ } func unloadModels() { rootEntity?.children.removeAll() rootEntity?.removeFromParent() rootEntity = nil } }

Hello, our game Nerd Survivors has been identified as spam. The game is based on an original IP and the only games that should share any resemblance with it are from our company. Today we got notified the rejection due to the violation of Guideline 4.3 but there is no reference to the other application or even a contact to the other developer. We do use Unity as our game engine, so some parts of the code might be shared across different games, but i cannot find any other justification of the failure. "Guideline 4.3(a) - Design - Spam We noticed your app shares a similar binary, metadata, and/or concept as apps submitted to the App Store by other developers, with only minor differences. Submitting similar or repackaged apps is a form of spam that creates clutter and makes it difficult for users to discover new apps."

can i use the es3.1 api in code?

Hello. I have a model of a CD record and box, and I would like to change the artwork of it via an external image URL. My 3D knowledge is limited, but what I can say is that the RealityView contains the USDZ of the record, which in turn contains multiple materials: ArtBack, ArtFront, PlasticBox, CD. How do I target an artwork material and change it to another image? Here is the code so far. RealityView { content in do { let entity = try await Entity.init(named: "VinylScene", in: realityKitContentBundle) entity.scale = SIMD3<Float>(repeating: 0.6) content.add(entity) } catch { ProgressView() } }

Hi! I was trying to port our sdk for visionOS. I was going through the documentation and saw this video: https://developer.apple.com/videos/play/wwdc2023/10089/ Is there any working code sample for it, same goes for arkit c api ? Couldn't find any links. Thanks in advance. Sahil

Hello! I need to display a .scnz 3D model in an iOS app. I tried converting the file to a .scn file so I could use it with SCNScene but the file became corrupted. I also tried to instantiate a SCNScene with the .scnz file but that didn't work either (crash when instantiating it). After all this, what would be the best way to use this file knowing that converting it or exporting it to a .scn file with scntool hasn't worked? Thank you!

I am installing Homebrew and GPTk according to this video: https://www.youtube.com/watch?v=WdQIc69e5oA I have Homebrew installed. When i type in which brew it responds with /opt/homebrew/bin/brew When I enter the command brew -v install apple/apple/game-porting-toolkit it replies with HomeBrew 4. 2. 21 Anyone know who to get the game porting kit to install? I have tried download both of the options (kit v1 and v1.1) from the website but it doesn't make a difference

I start a project for iPad/iPhone and I set SwiftUI - RealityKit and I can’t get the build to compile. I do nothing but create a project and hit run. So I am wondering if it’s even possible to run RealityKit on just an iPad anymore. I then tried to use Reality composer to import a basic cylinder shape to my project and that wouldn’t run either. So I am wondering how to get a 3D model into my iPad app so that the user can interact with it. Thanks for any help

I've added a recurring leaderboard in App Store Connect which I can get the localized title from, submit scores to, and load players from, but I'm getting an error whenever I try loading the image for it with the instance method for GKLeaderboard, loadImage(). The description from the error is: The requested operation could not be completed due to an error communicating with the server. Both the completion block and async versions of this method yield the same result. I made sure the image is a PNG in 1024x1024, 72 DPI, and in the RGB colorspace. No errors appear after I upload the image. Are there any hidden requirements that might be causing this error? Perhaps there is a waiting period before the server can provide the image?

I am trying to verify my understanding of adding a HoverEffectComponent on entities inside a scene in RealityViews. Inside RealityComposer Pro, I have added the required Input Target and Collision components to one entity inside a node with multiple siblings, and left any options as defaults. They appear to create appropriately sized bounding boxes etc for these objects. In my RealityView I programmatically add the HoverEffectComponents to the entities as I don't see them in RCP. On device, this appears to "work" in the sense that when I gaze at the entity, it lights up - but so does every other entity in the scene - even those without Input Target and Collision components attached. Because the documentation on the components is sparse I am unsure if this is behavior as designed (e.g. all entities in that node are activated) or a bug or something in between. Has anyone encountered this and is there an appropriate way of setting these relationships up? Thanks

I am wanting to create a 3D video game in Xcode for macOS, iOS, iPadOS, tvOS, and visionOS. I have heard that there are a few different ways to go about this such as MetalKit or SceneKit. These libraries seem to have little examples and documentation so I am wondering: Are they still be developed/supported? Which platform should I make a game in? Where are some resources to learn how to use these platforms? Are there other better platforms that I am just not aware of? Thanks!

Is it possible to create a material that behaves the same as AR ground plane, but in a NON-AR setup? Any help appreciated.

What best to pass to the options parameter of: MTLDevice.makeBuffer(length:options:) MTLDevice.makeBuffer(bytes:length:options:) MTLDevice.makeBuffer(bytesNoCopy:length:options:deallocator:) Basically I'm looking for a "plain English" explanation of MTLResourceOptions doc page.

Context https://developer.apple.com/forums/thread/751036 I found some sample code that does the process I described in my other post for ModelEntity here: https://www.youtube.com/watch?v=TqZ72kVle8A&ab_channel=ZackZack At runtime I'm loading: Immersive scene in a RealityView from Reality Compose Pro with the robot model baked into the file (not remote - asset in project) A Model3D view that pulls in the robot model from the web url A RemoteObjectView (RealityView) which downloads the model to temp, creates a ModelEntity, and adds it to the content of the RealityView Method 1 above is fine, but Methods 2 + 3 load the model with a pure black texture for some reason. Ideal state is Methods 2 + 3 look like the Method 1 result (see screenshot). Am I doing something wrong? e.g. I shouldn't use multiple Reality Views at once? Screenshot Code struct ImmersiveView: View { var body: some View { RealityView { content in // Add the initial RealityKit content if let immersiveContentEntity = try? await Entity(named: "Immersive", in: realityKitContentBundle) { content.add(immersiveContentEntity) // Add an ImageBasedLight for the immersive content guard let resource = try? await EnvironmentResource(named: "ImageBasedLight") else { return } let iblComponent = ImageBasedLightComponent(source: .single(resource), intensityExponent: 0.25) immersiveContentEntity.components.set(iblComponent) immersiveContentEntity.components.set(ImageBasedLightReceiverComponent(imageBasedLight: immersiveContentEntity)) // Put skybox here. See example in World project available at // https://developer.apple.com/ } } Model3D(url: URL(string: "https://developer.apple.com/augmented-reality/quick-look/models/vintagerobot2k/robot_walk_idle.usdz")!) SkyboxView() // RemoteObjectView(remoteURL: "https://developer.apple.com/augmented-reality/quick-look/models/retrotv/tv_retro.usdz") RemoteObjectView(remoteURL: "https://developer.apple.com/augmented-reality/quick-look/models/vintagerobot2k/robot_walk_idle.usdz") } }

When the dinosaur protrudes from the portal in the Encounter Dinosaurs app, it appears to be lit by the real room lighting, just like any other RealityKit content is by default. When the dinosaur is inside of the portal, it appears to be lit by the virtual environment, and the two light sources seem to be smoothly blended between at the plane of the portal. How is this done? ImageBasedLightReceiverComponent allows the IBL to be changed on a per-entity basis, but the actual lightning calculation shader code seems to be a black box, and I have not seen a way to specify which IBL texture is used on a per-fragment basis.

Hello, I would like to change the aspect (scale, texture, color) of a 3D element (Model Entity) when I hovered it with my eyes. What should I do If I want to create a request for this feature? And how would I know if it will ever be considered or when it will appear?

extension Entity { func addPanoramicImage(for media: WRMedia) { let subscription=TextureResource.loadAsync(named:"image_20240425_201630").sink( receiveCompletion: { switch $0 { case .finished: break case .failure(let error): assertionFailure("(error)") } }, receiveValue: { [weak self] texture in guard let self = self else { return } var material = UnlitMaterial() material.color = .init(texture: .init(texture)) self.components.set(ModelComponent( mesh: .generateSphere(radius: 1E3), materials: [material] )) self.scale *= .init(x: -1, y: 1, z: 1) self.transform.translation += SIMD3(0.0, -1, 0.0) } ) components.set(Entity.WRSubscribeComponent(subscription: subscription)) } problem: case .failure(let error): assertionFailure("(error)") Thread 1: Fatal error: Error Domain=MTKTextureLoaderErrorDomain Code=0 "Image decoding failed" UserInfo={NSLocalizedDescription=Image decoding failed, MTKTextureLoaderErrorKey=Image decoding failed}

I can't find a way to download a USDZ at runtime and load it into a Reality View with Reality kit. As an example, imagine downloading one of the 3D models from this Apple Developer page: https://developer.apple.com/augmented-reality/quick-look/ I think the process should be: Download the file from the web and store in temporary storage with the FileManager API Load the entity from the temp file location using Entity.init (I believe Entity.load is being deprecated in Swift 6 - throws up compiler warning) - https://developer.apple.com/documentation/realitykit/loading-entities-from-a-file Add the entity to content in the Reality View. I'm doing this at runtime on vision os in the simulator. I can get this to work with textures using slightly different APIs so I think the logic is sound but in that case I'm creating the entity with a mesh and material. Not sure if file size has an effect. Is there any official guidance or a code sample for this use case?

Hello. I am trying to enable Metal to take advantage of SwiftUI+Shaders in an existing app. In my target, I have added metal.framework, added a .metal file and confirmed I see the Metal Compiler option in my Build Settings. When I add a colorEffect modifier using the ShaderLibrary, the object renders black. I confirmed this is working in a new project so I suspect there are more steps required to get this working in an existing application.