TLDR: Timeline does not play animation when Repeat Forever is checked. Hi! I have created a timeline for my model that does a built-in emphasize animation. Then I added a behavior to my model and has set OnAddedToScene with action to run that timeline. It works perfect well on my device. But I want the timeline to be looped. I realized that there's no loop option in the timeline, but I noticed that I can loop it if I insert it into another timeline(The loop checkbox shows up). So I did that and had my model's behavior to run that timeline. But then the model doesn't play the animation as intended. Note: I am not making a VisionPro app, but an iOS app leveraging ARKit and RealityKit Environment: iPhone 13 Pro Max with iOS18.0 Code: struct ARViewContainer: UIViewRepresentable { func makeUIView(context: Context) -> ARView { let arView = ARView(frame: .zero) arView.session.run() Task { do { let anchor = AnchorEntity(plane: .horizontal) let emojiScene = try await Entity(named: "SunglassesScene", in: bubbleAR anchor.addChild(emojiScene) arView.scene.addAnchor(anchor) } catch { print("Failed to load models: \(error)") } } return arView } } Thank you!

I want to know are depth map and RGB image are perfectly aligned(do both have the same principle point)? If yes then how the depth- map is created. The depth map on iphone12 has 256x192 resolution as opposed to an RGB image (1920x1440). I am interested in exact pixel-wise depth. Is it possible to get the raw depth map of 1920x1440 resolution ? How is the depth-map is created at 256 x 192 resolution? Behind the scenes does the pipeline captures it at 1920 x1440 resolution and then resize it to 256x192? I have so many questions as there are no intrinsic, extrinsic, and calibration data given regarding the lidar. I would greatly appreciate it if someone can explain the steps from a computer-vision perspective. Many Thanks

I would like to implement the following but I am not sure if this is a supported use case based on the current documentation: Run one ARKitSession with a WorldTrackingProvider in Swift for mixed immersion Metal rendering (to get the device anchor for the layer renderer drawable & view matrix) Run another ARKitSession with a WorldTrackingProvider and a CameraFrameProvider in a different library (that is part of the same app) using the ARKit C API and using the transforms from the anchors in that session to render objects in the Swift application part. In general, is this a supported use case or is it necessary to have one shared ARKitSession? Assuming this is supported, will the (device) anchors from both WorldTrackingProviders reference the same world coordinate system? Are there any performance downsides to having multiple ARKitSessions? Thanks

In my app, I have an ARView that has cameraMode set to nonAR. I occasionally hide the ARView when it is not needed and reveal it again later. While the ARView is hidden, I'd like to pause the animation to save iPhone battery life. I'd also like to do this when I know that animation in my scene has paused and the contents of the view, although still visible, is static. This was possible using SceneKit, but I can't seem to find an equivalent way to do it using RealityKit. At least as of iOS 18, a hidden ARView with an empty scene appears to use approximately 30% of the CPU. How can I pause ARView so that it won't use the battery unnecessarily? Thank you for considering this question.

Hi everyone, I'm developing an ARKit app using RealityKit and encountering an issue where a video displayed on a 3D plane shows up as a pink screen instead of the actual video content. Here's a simplified version of my setup: func createVideoScreen(video: AVPlayerItem, canvasWidth: Float, canvasHeight: Float, aspectRatio: Float, fitsWidth: Bool = true) -> ModelEntity { let width = (fitsWidth) ? canvasWidth : canvasHeight * aspectRatio let height = (fitsWidth) ? canvasWidth * (1/aspectRatio) : canvasHeight let screenPlane = MeshResource.generatePlane(width: width, depth: height) let videoMaterial: Material = createVideoMaterial(videoItem: video) let videoScreenModel = ModelEntity(mesh: screenPlane, materials: [videoMaterial]) return videoScreenModel } func createVideoMaterial(videoItem: AVPlayerItem) -> VideoMaterial { let player = AVPlayer(playerItem: videoItem) let videoMaterial = VideoMaterial(avPlayer: player) player.play() return videoMaterial } Despite following the standard process, the video plane renders pink. Has anyone encountered this before, or does anyone know what might be causing it? Thanks in advance!

Devices running iOS 18 using RealityKit do not seem to receive lighting supplied via ARKit Environment Texturing (https://developer.apple.com/documentation/arkit/arworldtrackingconfiguration/2977509-environmenttexturing). Instead just a default IBL is used by RealityKit. This happens with RealityView as well as ARView. It also happens when I explicitly opt-in to environment texturing: let worldTrackingConfig = ARWorldTrackingConfiguration() worldTrackingConfig.environmentTexturing = .automatic arView.session.run(worldTrackingConfig) Even the Xcode AR Template has this issue. I'm attaching a screenshot of the sample app running on iOS 18 where it's broken and from iOS 17 where it works as expected. I hope this can get resolved quickly since I see it as a major regression. Feedback ID: FB15091335 UPDATE: It works on my older iPhone XS (iOS 18 22A5282m) Broken on iPad Pro (11-inch) (3rd generation) (iPadOS 18.0 (22A5350a)) Maybe it's related to LiDAR? Thank you! iOS 17 (works): iOS 18 (broken):

Hello We are exploring the iOS 17 RoomPlan updates that allow for a custom ARSession to be passed into the RoomCaptureSession via the new initializer. let roomCaptureSession = RoomCaptureSession(arSession: myARSession) Currently we use our ARSession to extract sceneDepth from the ARFrames via the delegate callback. This works prior to activation of the RoomCaptureSession via session.run(configuration). However, when we do call run on the RoomCaptureSession, sceneDepth is no longer present on the incoming ARFrames. Are these mutually exclusive? Should we expect ARFrame depth data to be present when a RoomCaptureSession is running with the shared ARSession?

The RoomPlan API makes it possible to serialize and de-serialize CapturedRoom objects. This opens up the possibility to modify a CapturedRoom (e.g. deleting surfaces/objects) in a de-serialized state and serialize it as a new CapturedRoom. All modified attributes are loaded accordingly, so far so good. My problem starts with the StructureBuilder and it's merge function capturedStructure(). This function ignores any modifications to attributes of a CapturedRoom. The only data that is considered is encoded in the CoreModel attribute (which is not mentioned in the official documentation). If someone has more information or a working solution about how to modify CapturedRooms please let me know. Additionally if there is somewhere a documentation about the CoreModel-attribute please post a link here.

Hello, Has anyone had success with implementing object tracking in Unity or adding native tracking capability to the VisionOS project built from Unity? I am working on an application for Vision Pro mainly in Unity using Polyspatial. The application requires me to track objects and make decisions based on tracked object's location. I was able to create an object tracking application on Native Swift, but could not successfully combine this with my Unity project yet. Each separate project (Main Unity app using Polyspatial and the native app on Swift) can successfully build and be deployed onto VisionPro. I know that Polyspatial and ARFoundation does not have support for ARKit's object tracking feature for VIsion Pro as of today, and they only support image tracking inside Unity. For that reason I have been exploring different ways of creating a bridge for two way interaction of the native tracking functionality and the other functionality in Unity. Below are the methods I tried and failed so far: Package the tracking functionality as a Swift Plugin and access this in Unity, and then build for Vision Pro: I can create packages and access them for simple exposed variables and methods, but not for outputs and methods from ARKit, which throw dependency errors while trying to make the swift package. Build project from Unity to VIsion Pro and expose a boolean to start/stop tracking that can be read by the native code, and then carry the tracking classes into the built project. In this approach I keep getting an error that says _TrackingStateChanged cannot be found, which is the class that exposes the bool toggled by the Unity button press: using System.Runtime.InteropServices; public class UnityBridge { [DllImport("__Internal")] private static extern void TrackingStateChanged(bool isTracking); public static void NotifyTrackingState() { // Call the Swift method TrackingStateChanged(TrackingStartManager.IsTrackingActive()); } } This seems to be translated to C++ code in the ill2cpp output from Unity, and even though I made sure that all necessary packages were added to the target, I keep receiving this error. from the UnityFramework plugin: Undefined symbol: _TrackingStateChanged I have considered extending the current Image Tracking approach in ARFoundation to include object tracking, but that seems to be too complicated for my use case and time frame for now. The final resort will be to forego Unity implementation and do everything in native code. However, I really want to be able to use Unity's conveniences and I have very limited experience with Swift development.

arScnView = ARSCNView(frame: CGRect.zero, options: nil) arScnView.delegate = self arScnView.automaticallyUpdatesLighting = true arScnView.allowsCameraControl = true addSubview(arScnView) arSession = arScnView.session arSession.delegate = self config = ARWorldTrackingConfiguration() config.sceneReconstruction = .meshWithClassification config.environmentTexturing = .automatic func session(_ session: ARSession, didAdd anchors: [ARAnchor]) { anchors.forEach({ anchor in if let meshAnchor = anchor as? ARMeshAnchor { let node = meshAnchor.toSCNNode() self.arScnView.scene.rootNode.addChildNode(node) } if let environmentProbeAnchor = anchor as? AREnvironmentProbeAnchor { // Can I retrieve the texture map corresponding to ARMeshAnchor from Environment Probe Anchor? // Or how can I retrieve the texture map corresponding to ARMeshAnchor? } }) } How can I scan a 3D scene and save it as USDZ? I want to achieve the following scenario?

The light of RealityView can only be effective on virtual objects. I hope it can be projected into the real world. What API can be implemented?

Hello everyone, I'm working on developing an app that allows users to share and enjoy experiences together while they are in the same physical locations. Despite trying several approaches, I haven't been able to achieve the desired functionality. If anyone has insights on how to make this possible or is interested in joining the project, I would greatly appreciate your help!

We've been using our app for the past year, and a user came back today that after three minutes, their phone starts getting hot and the screen dims. He is using 17.6.1 with an iPhone 14 max. No one else is seeing an issue, but with the posts online about 17.6.1 battery drain, I wonder if our AR app is somehow more sensitive to the issue.

We are attempting to update the texture on a node. The code below works correctly when we use a color, but it encounters issues when we attempt to use an image. The image is available in the bundle, and it image correctly in other parts of our application. This texture is being applied to both the floor and the wall. Please assist us with this issue." for obj in Floor_grp[0].childNodes { let node = obj.flattenedClone() node.transform = obj.transform let imageMaterial = SCNMaterial() node.geometry?.materials = [imageMaterial] node.geometry?.firstMaterial?.diffuse.contents = UIColor.brown obj.removeFromParentNode() Floor_grp[0].addChildNode(node) }

I have an app on the App Store for many years enabling users to post text into clouds in augmented reality. Yet last week abruptly upon installing the app on the iPhone the screen started going totally dark and a list of little comprehensible logs came up of the kind: ARSCNCompositor <0x300ad0e00>: ARSCNCompositor (0, 0) initialization failed. Matting is not set up properly. many times, then RWorldTrackingTechnique <0x106235180>: Unable to update pose [PredictorFailure] for timestamp 870.392108 ARWorldTrackingTechnique <0x106235180>: Unable to predict pose [1] for timestamp 870.392108 again several times and then: ARWorldTrackingTechnique <0x106235180>: SLAM error callback: Error Domain=Slam Error Code=7 "Non fatal error occurred due to significant drop in a IMU data" UserInfo={NSDescription=Non fatal error occurred due to significant drop in a IMU data, NSLocalizedFailureReason=SlamEngineNodeGroup Failure: IMU issue: gyro data stream verification failed [Significant data drop]. Failed on timestamp: 870.413247, Last known timestamp: 865.350198, Delta: 5.063049, System timestamp: 870.415781, Delta between system and frame: 0.002534. } and then again the pose issues several times. I hoped the new beta version would have solved the issue, but it was not the case. Unfortunately I do not know if that depends on the beta version or some other issue, given the app may be not installed on the Mac simulator.

FYI. The source code of the FindSurface demo app for Apple Vision Pro (visionOS) is available now. The Swift package of FindSurface™ library is required to build the source code into the demo app. https://github.com/CurvSurf/FindSurface-visionOS After starting the app, the floating panels (below) will appear on your right side, and you will see wireframe meshes that approximately describe your environments. Performing a spatial tap (pinching with your thumb and index finger) with staring at a location on the meshes will invoke FindSurface, with an indicator (blue disk) appearing on the surface you've gazed. Voice commands: “Tap” – Spatial tap (gazing & pinching). Invoke FindSurface. “Tap plane” – Plane selection. “Tap sphere” or “Tap ball” – Sphere selection. “Tap cylinder” – Cylinder selection. “Tap cone” – Cone selection. “Tap torus” or “Tap donut” – Torus selection. “Tap accuracy” or “Tap measurement accuracy” – Accuracy selection. “Tap mean distance”, “Tap average distance”, or “Tap distance” – Avg. Distance selection. “Tap touch radius” or “Tap seed radius” – Touch Radius selection. “Tap Inlier” – “Show inlier points” toggle. “Tap outline” – “Show geometry outline” toggle. “Tap clear” – “Clear Scene” click.

When running a modified version of the RoomPlan Demo I get frequent Session Interrupted conditions. In looking at the traces I find a status of SensorDidPause in the interruption Side of the error but am mystified as to how to determine which sensor it was that paused and how to diagnose it. It appears there is a bitmap of available and active sensor devices in the sensor info passed with the session data on the error. In looking at the error status I can see that one or two of the motion sensors have had a problem. How do I do further diagnostic checks on what the cause of the error is? I am also curious why the error occurred as soon as the AR Session for my test started via the “session.run” call. The documentation in this area seems difficult to find. Attached are traces from running the test and stack dumps for the calls. Please send me guidance on how to proceed. The device in question is an iPad iPhone(3) that is attached to the Mac mini named “Hawkeye”. There is no known direct involvement for the Hawkeye system

I'd like to capture the room with materials obtained through the camera while scanning with RoomPlan. Is there any way to capture room surface material and render the object while capturing the room geometry using RoomPlan?

In Reality View, I want to move an entity A to the position of entity B, but I can't determine the coordinates of entity B (for example, entity B is tracking the hand). What's the solution?

In this code: https://developer.apple.com/documentation/visionos/incorporating-real-world-surroundings-in-an-immersive-experience It contains a physical collision reaction between virtual objects and the real world, which is realized by creating a grid with physical components. However, I don't understand the information in the document very well. Who can give me a solution? Thank you!