On Scenekit, using SCNShapewe can create SCN geometry from SwiftUI 2D shapes/beziers:https://developer.apple.com/documentation/scenekit/scnshape Is there an equivalent in RealityKit? Could we use the generate(from:) for that?https://developer.apple.com/documentation/realitykit/meshresource/3768520-generate https://developer.apple.com/documentation/realitykit/meshresource/3768520-generate

Hello Dev Community, I've been thinking over Apple's preference for USDZ for AR and 3D content, especially when there's the widely used GLTF. I'm keen to discuss and hear your insights on this choice. USDZ, backed by Apple, has seen a surge in the AR community. It boasts advantages like compactness, animation support, and ARKit compatibility. In contrast, GLTF too is a popular format with its own merits, like being an open standard and offering flexibility. Here are some of my questions toward the use of USDZ: Why did Apple choose USDZ over other 3D file formats like GLTF? What benefits does USDZ bring to Apple's AR and 3D content ecosystem? Are there any limitations of USDZ compared to other file formats? Could factors like compatibility, security, or integration ease have influenced Apple's decision? I would love to hear your thoughts on this. Feel free to share any experiences with USDZ or other 3D file formats within Apple's ecosystem!

Hi, is there a way in visionOS to anchor an entity to the POV via RealityKit? I need an entity which is always fixed to the 'camera'. I'm aware that this is discouraged from a design perspective as it can be visually distracting. In my case though I want to use it to attach a fixed collider entity, so that the camera can collide with objects in the scene. Edit: ARView on iOS has a lot of very useful helper properties and functions like cameraTransform (https://developer.apple.com/documentation/realitykit/arview/cameratransform) How would I get this information on visionOS? RealityViews content does not seem offer anything comparable. An example use case would be that I would like to add an entity to the scene at my users eye-level, basically depending on their height. I found https://developer.apple.com/documentation/realitykit/realityrenderer which has an activeCamera property but so far it's unclear to me in which context RealityRenderer is used and how I could access it. Appreciate any hints, thanks!

I have a RealityView in my visionOS app. I can't figure out how to access RealityRenderer. According to the documentation (https://developer.apple.com/documentation/realitykit/realityrenderer) it is available on visionOS, but I can't figure out how to access it for my RealityView. It is probably something obvious, but after reading through the documentation for RealityView, Entities, and Components, I can't find it.

has anyone gotten their 3d Models to render in seperate windows, i tried following the code in the video for creating a seperate window group, but i get a ton of obsecure errors, i was able to get it to render in my 2d windows, but when i try making a seperate window group i get errors

I have some strange behavior in my app. When I set the position to .zero you can see the sphere normally. But when I change it to any number it doesn't matter which and how small. The Sphere isn't visible or in the view. The RealityView import SwiftUI import RealityKit import RealityKitContent struct TheSphereOfDoomRV: View { @StateObject var viewModel: SphereViewModel = SphereViewModel() let sphere = SphereEntity(radius: 0.25, materials: [SimpleMaterial(color: .red, isMetallic: true)], name: "TheSphere") var body: some View { RealityView { content, attachments in content.add(sphere) } update: { content, attachments in sphere.scale = SIMD3<Float>(x: viewModel.scale, y: viewModel.scale, z: viewModel.scale) } attachments: { VStack { Text("The Sphere of Doom is one of the most powerful Objects. You can interact with him in every way you can imagine ").multilineTextAlignment(.center) Button { } label: { Text("Play Video!") } }.tag("description") }.modifier(GestureModifier()).environmentObject(viewModel) } } SphereEntity: import Foundation import RealityKit import RealityKitContent class SphereEntity: Entity { private let sphere: ModelEntity @MainActor required init() { sphere = ModelEntity() super.init() } init(radius: Float, materials: [Material], name: String) { sphere = ModelEntity(mesh: .generateSphere(radius: radius), materials: materials) sphere.generateCollisionShapes(recursive: false) sphere.components.set(InputTargetComponent()) sphere.components.set(HoverEffectComponent()) sphere.components.set(CollisionComponent(shapes: [.generateSphere(radius: radius)])) sphere.name = name super.init() self.addChild(sphere) self.position = .zero // .init(x: Float, y: Float, z: Float) and [Float, Float, Float] doesn't work ... } }

I am attempting to place images in wall anchors and be able to move their position using drag gestures. This seem pretty straightforward if the wall anchor is facing you when you start the app. But, if you place an image on a wall anchor to the left or the wall behind the original position then the logic stops working properly. The problem seems to be the anchor and the drag.location3D orientations don't coincide once you are dealing with wall anchors that are not facing the original user position (Using Xcode Beta 8) Question: How do I apply dragging gestures to an image regardless where the wall anchor is located at in relation to the user original facing direction? Using the following code: var dragGesture: some Gesture { DragGesture(minimumDistance: 0) .targetedToAnyEntity() .onChanged { value in let entity = value.entity let convertedPos = value.convert(value.location3D, from: .local, to: entity.parent!) * 0.1 entity.position = SIMD3<Float>(x: convertedPos.x, y: 0, z: convertedPos.y * (-1)) } }

Hi, I'm trying to use the ECS System class, and noticing on hardware, that update() is not being called every frame as its described in the Simulator, or as described in the documentation. To reproduce, simply create a System like so: class MySystem : System { var count : Int = 0 required init(scene: Scene) { } func update(context: SceneUpdateContext) { count = count + 1 print("Update \(count)") } } Then, inside the RealityView, register the System with: MySystem.registerSystem() Notice that while it'll reliably be called every frame in Simulator, it'll run for a few seconds on hardware, freeze, then only be called when indirectly doing something like moving a window or performing other visionOS actions that are analogous to those that call "invalidate" to refresh a window in other operating systems. Thanks in advance, -Rob.

I'm developing 3D Scanner works on iPad. I'm using AVCapturePhoto and Photogrammetry Session. photoCaptureDelegate is like below: extension PhotoCaptureDelegate: AVCapturePhotoCaptureDelegate { func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) { let fileUrl = CameraViewModel.instance.imageDir!.appendingPathComponent("\(PhotoCaptureDelegate.name)\(id).heic") let img = CIImage(cvPixelBuffer: photo.pixelBuffer!, options: [ .auxiliaryDepth: true, .properties: photo.metadata ]) let depthData = photo.depthData!.converting(toDepthDataType: kCVPixelFormatType_DepthFloat32) let colorSpace = CGColorSpace(name: CGColorSpace.sRGB) let fileData = CIContext().heifRepresentation(of: img, format: .RGBA8, colorSpace: colorSpace!, options: [ .avDepthData: depthData ]) try? fileData!.write(to: fileUrl, options: .atomic) } } But, Photogrammetry session spits warning messages: Sample 0 missing LiDAR point cloud! Sample 1 missing LiDAR point cloud! Sample 2 missing LiDAR point cloud! Sample 3 missing LiDAR point cloud! Sample 4 missing LiDAR point cloud! Sample 5 missing LiDAR point cloud! Sample 6 missing LiDAR point cloud! Sample 7 missing LiDAR point cloud! Sample 8 missing LiDAR point cloud! Sample 9 missing LiDAR point cloud! Sample 10 missing LiDAR point cloud! The session creates a usdz 3d model but scale is not correct. I think the point cloud can help Photogrammetry session to find right scale, but I don't know how to attach point cloud.

I know that CustomMaterial in RealityKit can update texture by use DrawableQueue, but in new VisionOS, CustomMaterial doesn't work anymore. How i can do the same thing，does ShaderGraphMaterial can do？I can't find example about how to do that. Looking forward your repley, thank you!

Hi, I have a usdz asset of a torus / hoop shape that I would like to pass another Reality Kit Entity cube-like object through (without touching the torus) in VisionOS. Similar to how a basketball goes through a hoop. Whenever I pass the cube through, I am getting a collision notification, even if the objects are not actually colliding. I want to be able to detect when the objects are actually colliding, vs when the cube passes cleanly through the opening in the torus. I am using entity.generateCollisionShapes(recursive: true) to generate the collision shapes. I believe the issue is in the fact that the collision shape of the torus is a rectangular box, and not the actual shape of the torus. I know that the collision shape is a rectangular box because I can see this in the vision os simulator by enabling "Collision Shapes" Does anyone know how to programmatically create a torus in collision shape in SwiftUI / RealityKit for VisionOS. Followup, can I create a torus in reality kit, so I don't even have to use a .usdz asset?

In my project, i want to use new shadergraphmaterial to do the stereoscopic render, i notice that there is a node called Camera Index Switch Node can do this. But when i tried it , i found that : It can only output Integer type value, when i change to float value , it change back again, i don't konw if it is a bug. 2. So i test this node with a IF node，i found that it output is weird. Below is zero should output，it is black but when i change to IF node，it is grey，it is neither 0 nor 1（My IF node result is TRUE result 1, FALSE result 0） I wanna ask if this is a bug, and if this is a correct way to do the stereoscopic render.

I have an immersive environment with a skybox which uses an png image inside a sphere. I added an IBL, but I am not sure what the best format / prep method is for the IBL image. I have tried several different images for my IBL, and all are very different vibes from what I have in Blender. My question is how can I create an IBL that's closest to Blender's Cycles rendering engine? However, it's a rather difficult to answer question, so I want to ask some smaller questions first. Does IBL need to be BW or will colour work? From my tests: colour works just as well. But why does Apple only show use of BW ones? Should we use BW? What is the best file format for IBL? Any pros/cons? Or should we just test out each format and check visually. From my tests: PNG, OpenEXR (.exr), Radiance HDR (.hdr) all work. But which format is recommended? Will IBL on visionOS create shadows for us? In Blender an HDRI gives shadows. From my tests: No, IBL does not provide shadows on your loaded environment/meshes. Is "shadow baking" the only solution for the time being? Looking at a scene in Blender which uses HDRI as global lighting, how can we best "prep" the IBL image that will give the closest light similar to Blender's Cycles rendering engine? From my tests: I tried (as shown below) A) make a render of just the Blender HDRI (without meshes) via 360-degree panoramic camera. →　Usage as IBL makes everything too bright. B) make a render of the entire Blender scene via 360-degree panoramic camera. →　Usage as IBL makes everything washed out and yellowish. C) Use the Sunlight.png from the sample project. →　With this IBL the scene is too dark. D) Use the SystemIBL.exr from another sample project. →　With this IBL the scene looks very flat and not realistic at all. Here I show each IBL I described above 1~4 and sample screenshots from the simulator: A) B) C) D) The atmosphere I'm aiming for as per Blender's Cycles rendering engine: Can anyone help me with my questions 1 ~ 4 above. It would give me some insight in how to create immersive environments with realistic lighting & shadows. : ) Much appreciated! — Luca

How can we move the player within a RealityKit/RealityView scene? I am not looking for any animation or gradual movement, just instantaneous position changes. I am unsure of how to access the player (the person wearing the headset) and it's transform within the context of a RealityView. The goal is to allow the player to enter a full space in immersive mode and explore a space with various objects. They should be able to select an object and move closer to it.

All of a sudden (like when XCode 15.2 left beta yesterday?) I can't build attachments into my RealityView: var body: some View { RealityView { content, attachments in // stuff } attachments: { // stuff } Produces "No exact matches in call to initializer" on the declaration line (RealityView { content, attachments in). So far as I can tell, this is identical to the sample code provided at the WWDC session, but I've been fussing with various syntaxes for an hour now and I can't figure out what the heck it wants.

Is there a SceneKit equivalent of the HoverEffectComponent used in RealityKit to highlight an entity as the user looks around a scene in a VisionOS app?

Hi Guys, I've been trying to put my model to react to light in visionOS Simulator by editing the component in Reality Composer Pro and also modifying it by code, but I can only put the shadow if I put it as an usdz file, it's not as reflective as when I see it on reality converter or reality composer pro, does someone have this problem too? RealityView { content in if let bigDonut = try? await ModelEntity(named: "bigdonut", in: realityKitContentBundle) { print("LOADED") // Create anchor for horizontal placement on a table let anchor = AnchorEntity(.plane(.horizontal, classification: .table, minimumBounds: [0,0])) // Configure scale and position bigDonut.setScale([1,1,1], relativeTo: anchor) bigDonut.setPosition([0,0.2,0], relativeTo: anchor) // Add the anchor content.add(anchor) // Enable shadow casting but this does not work bigDonut.components.set(GroundingShadowComponent(castsShadow: true)) } }

Hi, I have a series of child entities in a USDZ file that I would like to be able to rotate relative to a joint point between one another. I believe the functionality I am looking for was available in SceneKit with SCNPhysicsHingeJoint. How would I go about replicating this functionality in RealityKit? The current output of a rotation applied is relative to the model origin as a whole. (see below) Thanks! Freddie

Hi guys, I thought I make a visionOS test app with the Apple's native robot.usdz file. My plan was to rotate limbs of the robot programatically, but while I can see the bones in previous Xcode versions and in Blender, somehow I can not reach them in Xcode 15.3 or Reality Composer Pro. Has anyone any experience with that?

Is it possible to animate some property on a RealityKit component? For example, the OpacityComponent has an opacity property that allows the opacity of the entities it's attached to, to be modified. I would like to animate the property so the entity fades in and out. I've been looking at the animation API for RealityKit and it either assumes the animation is coming from a USDZ (which this is not), or it allows properties of entities themselves to be animated using a BindTarget. I'm not sure how either can be adapted to modify component properties? Am I missing something? Thanks