I have an application running on visionOS 2.0 that uses the ARKit C API to create anchors and listen for updates. I am running an ARKit session with a WorldTrackingProvider (and a CameraFrameProvider, if that is relevant) Then, I am registering a callback using ar_world_tracking_provider_set_anchor_update_handler_f When updates arrive I iterate over the updated anchors using ar_world_anchors_enumerate_anchors_f. Then, as described in the https://developer.apple.com/documentation/visionos/tracking-points-in-world-space documentation, I walk around and hold down the Digital Crown to reposition the current space. This resets the world origin to my current position. When this happens, anchor updates arrive. In most cases, the anchor updates return the new transform (using ar_world_anchor_get_origin_from_anchor_transform) but sometimes I get an anchor update that reports the transform of the anchor from before the world origin was repositioned. Meaning instead of staying in place in the physical world, the world anchor moves relative to me. I can work around this by calling ar_world_tracking_provider_copy_all_world_anchors_f which provides me with the correct transform, but this async method also adds some noticeable delay to the anchor updates. Is this already a known issue?

In my VisionPro app, I'm facing a problem with loading USDZ models from a RealityKitBundle package, created using Reality Composer Pro. It was working fine until I added more models to the package. As I added more models with large textures in the project, the app started to show them with texturing problems. So, when I load the models from the RealityView using Entity(named:in), the mesh loads correctly, but all black, with no textures, as below: However, when I load the same USDZ directly from the main bundle, using ModelEntity(named:in), it loads fine. I know that large textures can cause memory issues, but when talking about one single model, I know that it's not enough to cause a memory overflow in the VisionPro. This USDZ model is about 40MB with something around 800MB of texture memory (from the RealityComposerPro Statistic tab). I've built experiences in VisionPro with much heavier models, and they do present the same texture issues, but only after there's more than 3 huge models enabled in the Reality scene. But that's not the case. The un-textured model appears right from the beginning, so it seems to me that's not a runtime issue in the device, but rather some issue in the packaging process from RealityComposerPro to XCode to the Device, am I correct? I'm also using a simple Mac Mini with M2 but only 8MB of RAM. Maybe that's the issue? As I still want to use RealityComposerPro to build more dev-friendly and interesting applications, I'd really appreciate some guidance here! Thanks in advance!

I'm getting the following error in my swift build targeting VisionOS 2.0 : " 'defaultDisplay' is unavailable in visionOS " TLDR : how do I specify an initial window position in visionOS? The docs seem to be off? - see below. The docs say it is available, but it is not, or at least my XCODE (Version 16.0 ) is throwing errors on it : https://developer.apple.com/documentation/swiftui/scene/defaultwindowplacement(_:) I know apple is opinionated about window placement in visionOS, and maybe it will never be available, but the docs say it is in visionOS 2.0+ and it sure would be nice to be able to specify a default position toward the bottom of one's FOV, etc . Side-note -- the example code in that doc also has the issue that "Window" is not available in visionOS ( WindowGroup is ). example code -- barely modified from example code in doc : var body: some Scene { WindowGroup("MyLilWindow", id: "MyLilWindow") { TestView() } .windowResizability(.contentSize) .defaultWindowPlacement { content, context in let displayBounds = context.defaultDisplay.visibleRect let size = content.sizeThatFits(.unspecified) let position = CGPoint( x: displayBounds.midX - (size.width / 2), y: displayBounds.maxY - size.height - 140) return WindowPlacement(position) } }

Hello, I am getting following error on console and my app crashes. It goes to dark and then Apple logo appears and app crashes apply fence tx failed (client=0x61dbbfd7) [0xfffffecc (ipc/mig) server died] [C:3] Error received: Connection interrupted. Failed to commit transaction (client=0x94097449) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xe9684b50) [0x10000003 (ipc/send) invalid destination port] [C:3-1] Error received: Connection interrupted. Failed to commit transaction (client=0xbcac17e9) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0x52392119) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xff841d17) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xdef5c915) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xefdc8bf3) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xd50c1eff) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0x15690a46) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0xf296f56b) [0x10000003 (ipc/send) invalid destination port] Failed to commit transaction (client=0x61dbbfd7) [0x10000003 (ipc/send) invalid destination port] apply fence tx failed (client=0x61dbbfd7) [0x10000003 (ipc/send) invalid destination port] nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_read_request_report [C1] Receive failed with error "No message available on STREAM" nw_protocol_socket_reset_linger [C1:2] setsockopt SO_LINGER failed [22: Invalid argument] apply fence tx failed (client=0x61dbbfd7) [0x10000003 (ipc/send) invalid destination port] Failed to set override status for bind point component member. Failed to set override status for bind point component member. Failed to set override status for bind point component member. Message from debugger: Terminated due to signal 9 Could you please tell me what's the reason and how can I resolve this. When I loads 2,3 times then app works fine from that point onwards. But this happens time to time when debug.

I am honored that I successfully participated in the "Envision the future: Build great apps for visionOS"(https://developer.apple.com/events/view/ZCH7ZUY24C/dashboard) conference. However, unfortunately, I am in China, and due to the visa problem (because it usually takes at least 2 months to apply for a visa, but it only takes about 10 days from the time I received the notice to the meeting), I can't go to the United States to participate in the site. So I hope Apple can place an iPad on site and create a FaceTime link, and then I can make a call to this iPad. I also told Apple about this suggestion, but now there are only a few days left to start. They didn't reply to me. Even Apple has sent me the ticket to the Developer Center and asked me to add it to the Apple Wallet App, which means that Apple has not There is a request to deal with me. So I hope you can give me some advice or help me for those who know about this aspect. For Apple's internal engineers, if possible, I hope you can contact the person who manages this meeting. I'm very grateful for this. Thank you.

I have a created an AnchorEntity for my index finger tip and then created a model entity (A sphere) as a child of it. This model entity has a collision component and a physics body component. I tried using dynamic and kinematic modes for the physics body component. I have created a plane from a cube that has collision component and a static physics body. I have subscribed to the CollisionEvents.Began on this plane. I have also stored it in a EventSubscription state variable. @State private var collisionSubscription: EventSubscription? The I subscribed as follows collisionSubscription = content.subscribe(to: CollisionEvents.Began.self, on: self.boxTopCollision, { collisionEvent in print("something collided with the box top") }) The collision event fires when I directly put the sphere above the plane and let gravity do the collision, but when the the sphere is the child of the anchor entity, the collision events don't happen. I tried adding collision and physics body component directly to the anchor entity and that doesn't work too. I created another sphere with a physics body and a collision component and input target component and manipulate it with a drag gesture. When the manipulation is happening and collide the plane and the sphere the events don't happen when my sphere is touching the plane, but when the gesture end and the sphere is in contact with the plane, the event gets fired. I am confused as to why this is happening. All I want to do is have a collider on my finger tip and want to detect the collision with this plane. How can I make this work? Is there some unstated rule somewhere as where a physics body is manipulated manually it cannot trigger collision events? For more context. I am using SpatialTrackingSession with the tracking configuration of .hand. I am successfully able to track the finger tip.

I am working on a project that requires access to the main camera on the Vision Pro. My main account holder applied for the necessary enterprise entitlement and we were approved and received the Enterprise.license file by email. I have added the Enterprise.license file to my project, and manually added the com.apple.developer.arkit.main-camera-access.allow entitlement to the entitlement file and set it to true since it was not available in the list when I tried to use the + Capability button in the Signing & Capabilites tab. I am getting an error: Provisioning profile "iOS Team Provisioning Profile: " doesn't include the com.apple.developer.arkit.main-camera-access.allow entitlement. I have checked the provisioning profile settings online, and there is no manual option for adding the main camera access entitlement, and it does not seem to be getting the approval from the license.

Hello everyone, I'm developing an app for visionOS that utilizes HealthKit to query heart rate data. However, I'm encountering an issue where the app doesn't retrieve the latest heart rate values. Specifically, it fails to get live heart rate data even after the data has been saved to the Health app. The readings my app displays are outdated and do not match the current values shown in the Health app. Here's what I've tried so far: Fetching Heart Rate Samples: Used HKSampleQuery and HKAnchoredObjectQuery to fetch the most recent heart rate samples. Despite this, the data retrieved is still not up-to-date. Checking Permissions: Ensured that all necessary HealthKit permissions are granted. The app has authorization to read heart rate data and write workout data. My questions are: Is there a known issue or limitation with HealthKit on visionOS that prevents apps from accessing the latest heart rate data? Are there additional steps or configurations required to access live heart rate data in visionOS apps? Has anyone successfully implemented live heart rate monitoring on visionOS, and if so, could you share how you achieved it?

Given my limited knowledge of physics, I would appreciate it if individuals with a solid understanding of the subject could provide insights into this matter. I have added a physical component to a entity in Reality Composer Pro, but I am seeking guidance on how to achieve the following: Make an object float in the air (with a slight downward motion reminiscent of the moon’s surface) Enable the object to move at a slow pace Implement a strong rebound force I would be grateful if you could provide appropriate values for these parameters. Thank you for your assistance.

My app has two Window Groups: Window1 and Window2 Moving Window2 to Window1 will overlay, and I cannot see or interact with Window1. My question is, is there any way that I can make Window1 always on top, and whenever Window2 moves in front of Window1, will it be overlayed instead of Window1?

In my Vision OS app I am using plane detection and I want to create planes that have physics I want to create an effect that my reality kit entities rest on real world detected planes. I was curious to see that the code below that I found in the Samples is the most efficient way of doing this. func processPlaneDetectionUpdates() async { for await anchorUpdate in planeTracking.anchorUpdates { let anchor = anchorUpdate.anchor if anchorUpdate.event == .removed { planeAnchors.removeValue(forKey: anchor.id) if let entity = planeEntities.removeValue(forKey: anchor.id) { entity.removeFromParent() } return } planeAnchors[anchor.id] = anchor let entity = Entity() entity.name = "Plane \(anchor.id)" entity.setTransformMatrix(anchor.originFromAnchorTransform, relativeTo: nil) // Generate a mesh for the plane (for occlusion). var meshResource: MeshResource? = nil do { let contents = MeshResource.Contents(planeGeometry: anchor.geometry) meshResource = try MeshResource.generate(from: contents) } catch { print("Failed to create a mesh resource for a plane anchor: \(error).") return } var material = UnlitMaterial(color: .red) material.blending = .transparent(opacity: .init(floatLiteral: 0)) if let meshResource { // Make this plane occlude virtual objects behind it. entity.components.set(ModelComponent(mesh: meshResource, materials: [material])) } // Generate a collision shape for the plane (for object placement and physics). var shape: ShapeResource? = nil do { let vertices = anchor.geometry.meshVertices.asSIMD3(ofType: Float.self) shape = try await ShapeResource.generateStaticMesh(positions: vertices, faceIndices: anchor.geometry.meshFaces.asUInt16Array()) } catch { print("Failed to create a static mesh for a plane anchor: \(error).") return } if let shape { entity.components.set(CollisionComponent(shapes: [shape], isStatic: true)) let physics = PhysicsBodyComponent(mode: .static) entity.components.set(physics) } let existingEntity = planeEntities[anchor.id] planeEntities[anchor.id] = entity contentEntity.addChild(entity) existingEntity?.removeFromParent() } } } extension MeshResource.Contents { init(planeGeometry: PlaneAnchor.Geometry) { self.init() self.instances = [MeshResource.Instance(id: "main", model: "model")] var part = MeshResource.Part(id: "part", materialIndex: 0) part.positions = MeshBuffers.Positions(planeGeometry.meshVertices.asSIMD3(ofType: Float.self)) part.triangleIndices = MeshBuffer(planeGeometry.meshFaces.asUInt32Array()) self.models = [MeshResource.Model(id: "model", parts: [part])] } } extension GeometrySource { func asArray<T>(ofType: T.Type) -> [T] { assert(MemoryLayout<T>.stride == stride, "Invalid stride \(MemoryLayout<T>.stride); expected \(stride)") return (0..<count).map { buffer.contents().advanced(by: offset + stride * Int($0)).assumingMemoryBound(to: T.self).pointee } } func asSIMD3<T>(ofType: T.Type) -> [SIMD3<T>] { asArray(ofType: (T, T, T).self).map { .init($0.0, $0.1, $0.2) } } subscript(_ index: Int32) -> (Float, Float, Float) { precondition(format == .float3, "This subscript operator can only be used on GeometrySource instances with format .float3") return buffer.contents().advanced(by: offset + (stride * Int(index))).assumingMemoryBound(to: (Float, Float, Float).self).pointee } } extension GeometryElement { subscript(_ index: Int) -> [Int32] { precondition(bytesPerIndex == MemoryLayout<Int32>.size, """ This subscript operator can only be used on GeometryElement instances with bytesPerIndex == \(MemoryLayout<Int32>.size). This GeometryElement has bytesPerIndex == \(bytesPerIndex) """ ) var data = [Int32]() data.reserveCapacity(primitive.indexCount) for indexOffset in 0 ..< primitive.indexCount { data.append(buffer .contents() .advanced(by: (Int(index) * primitive.indexCount + indexOffset) * MemoryLayout<Int32>.size) .assumingMemoryBound(to: Int32.self).pointee) } return data } func asInt32Array() -> [Int32] { var data = [Int32]() let totalNumberOfInt32 = count * primitive.indexCount data.reserveCapacity(totalNumberOfInt32) for indexOffset in 0 ..< totalNumberOfInt32 { data.append(buffer.contents().advanced(by: indexOffset * MemoryLayout<Int32>.size).assumingMemoryBound(to: Int32.self).pointee) } return data } func asUInt16Array() -> [UInt16] { asInt32Array().map { UInt16($0) } } public func asUInt32Array() -> [UInt32] { asInt32Array().map { UInt32($0) } } } I was also curious to know if I can do this without ARKit using SpatialTrackingSession. My understanding is that using SpatialTrackingSession in RealityKit I can only get the transforms of the AnchorEntities but it won't have geometry information to create the collision shapes.

https://developer.apple.com/documentation/realitykit/model3d/ontapgesture(count:coordinatespace:perform:) link -> double tap gesture deprecated in visionOS2.0. use only watchOS. right..? so how can i make a double tap gesture in visionOS??

How can I create a 3D model of clothing that behaves like real fabric, with realistic physics? Is it possible to achieve this model by photogrammetry? I want to use this model in the Apple Vision Pro and interact with it using hand gestures.

Today I updated my macbook pro to macOS sequoia. with this I also downloaded the latest Xcode and visionOS 2 packages. I had a working project. Which did work with my vision pro which is updated to the latest visionOS 2. But now whenever I try to click on preview in xcode while editing a swift file I am receiving the following error: (lot of lines here) Library/Developer/Xcode/DerivedData/test2-fznbrpphddkqdaddrzamkayoajjm/Build/Intermediates.noindex/RealityKitContent.build/Debug-xrsimulator/RealityKitContent_RealityKitContent.build/DerivedSources/RealityAssetsGenerated/CustomComponentUSDInitializers.usda error: Tool terminated by signal 'Segmentation fault: 11' I tried exiting and restarting my mac but the problem is not going away. Can someone help me with this? Thank you!

Hi, we have in our app an immersive space and we taught the palm menu button is not available in immersive spaces, but when I look in the hand and tap the menu button appear. Is it possible to keep it hidden? Because we a have an hand tracking feature in palm and when we try to press a button to overlap the palm it triggers the menu button and then when the user presses again by mistake, it sends the application to the background. This is very important for us because we would like to release this hand-tracking feature as soon as possible. Here is a link with to a video with the problem: https://drive.google.com/file/d/1cfOcdzF19h_mbmpvkVNCJjXEBJecVeJL/view?usp=sharing

Hello I was wondering if the keyboard awareness feature that came with visionOS 2 would also work for the Mac Book keyboard if someone is in an immersive .progressive custom environment such as the "Garden" environment from Construct an immersive environment for visionOS in e.g. an app I'm currently developing, to see one's keyboard. I haven't managed to achieve it so far. Thank you very much in advance!

I am trying to position the share sheet popped up by the shareLink API on VisionOS, but the share sheet is always anchored by at the label position. I checked the Photos app is achieving this already, the share sheet there appears at very center of the window while the share button locates at the corner inside the menu. How is this possible to make it?

I am having trouble with initializing the SharePlay. It works but we have to leave the game (click the close button) and rejoin it, sometimes several times, for it to establish the connection. I am also having trouble sharing images over SharePlay with GroupSessionJournal. I am not able to get it to transfer any amount of data or even get recognition on the other participants in the SharePlay that an image is being sent. We have look at all the information we can find online and are not able to establish a connection. I am not sure if I am missing a step, or if I am incorrectly sending the data through the GroupSessionJournal. Here are the steps I took take to replicate the issue I have: FaceTime another person with the app. Open the app and click the SharePlay button to SharePlay it with the other person. Establish the SharePlay and by making sure that the board states are syncronized across participants. If its not click the close button and click open app again to rejoin the SharePlay. (This is one of the bugs that I would like to fix. This is just a work around we developed to establish the SharePlay. We would like it so that when you click SharePLay and they join the session it works.) Once the SharePlay has been established, change the image by clicking change 1 image. Select a jpg image. The image that represents 1 should be not set. If you dont see the image click on any of the X in the squares and it will change to the image. The image should appear on the other participant in the SharePlay. (This does not happen and is what we have not been able to figure out how to get working.) Here are the classes for the example project I created: Content View Game Model Class Activity Manager Main Starter Class

To set the stage: I made a prototype of an app for a company, the app is to be used internally right now. Prototype runs perfectly on iOS, so now I got VP to port the app to its final destination. The first thing I found out is that the image tracking on VP is useless for moving images (and that's the core of my app). Also distance at which image is lost seems to be way shorter on VP. Now I'm trying to figure out if it's possible to fix/work around it in any way and I'm wondering if Enterprise API would change anything. So: Is it possible to request Enterprise API access as a single person with basic Apple Developer subscription? I looked around the forum and only got more confused. Does QR code detection and tracking work any better than image detection, or anchor updates are the same? Does the increased "object detection" frequency affect in any way image/QR tracking, or is it (as name implies) only for object tracking? Would increasing the CPU/GPU headroom make any change to image/QR detection frequency? Is there something to disable to make anchor updates more frequent? I don't need complex models, shadows, physics, etc. Greetings Michal

Now I'm developing a 3D motion capture app by using ARKit. So I tested this sample code, but in iOS18, hand's and leg's orientations seems to be wrong. Forrowing image is sample app's screen captures in iOS17 and iOS18.