Hi, I'm looking to update the metadata properties of a DNG image stored on disc, saving to a new file. Using ImageIO's CGImageSource and CGImageDestination classes, I run into a problem where by the destination doesn't support the type of the source. For example: let imageSourceOptions = [kCGImageSourceShouldCache: false] as CFDictionary if let cgImageSource = CGImageSourceCreateWithURL(sourceURL as CFURL, imageSourceOptions), let type = CGImageSourceGetType(cgImageSource) { guard let imageDestination = CGImageDestinationCreateWithURL(destinationURL as CFURL, type, 1, nil) else { fatalError("Unable to create image destination") } // Code to update properties and write out to destination url } } When this code is executed I get the following errors on the command line when trying to create the destination: 2024-06-30 11:52:25.531530+0100 ABC[7564:273101] [ABC] findWriterForTypeAndAlternateType:119: *** ERROR: unsupported output file format 'com.adobe.raw-image' 2024-06-30 11:52:25.531661+0100 ABC[7564:273101] [ABC] CGImageDestinationCreateWithURL:4429: *** ERROR: CGImageDestinationCreateWithURL: failed to create 'CGImageDestinationRef' I don't see a way to create a destination directly from a source? Yes, the code works for say a JPEG file but I want it to work for any image format that CGImageSource can work with?

Hello, I am looking to create a shader to update an entity's rendering. As a basic example say I want to recolour an entity, but leave its original textures showing through: I understand with VisionOS I need to use Reality Composer Pro to create the shader, but I'm lost as how to reference the original colour that I'm trying to update in the node graph. All my attempts appear to completely override the textures in the entity (and its sub-entities) that I want to impact. Also the tutorials / examples I've looked at appear to create materials, not add an effect on top of existing materials. Any hints or pointers? Assuming this is possible, I've been trying to load the material in code, and apply to an entity. But do I need to do this to all child entities, or just the topmost? do { let entity = MyAssets.createModelEntity(.plane) // Loads from bundle and performs config let material = try await ShaderGraphMaterial(named: "/Root/TestMaterial", from: "Test", in: realityKitContentBundle) entity.applyToChildren { $0.components[ModelComponent.self]?.materials = [material] } root.addChild(entity) } catch { fatalError(error.localizedDescription) }

When I run the debug memory graph from Xcode I'm getting a set of system objects with warnings. Are there any tips on how to locate what might be causing these?

I implemented an EntityAction to change the baseColor tint - and had it working on VisionOS 2.x. import RealityKit import UIKit typealias Float4 = SIMD4<Float> extension UIColor { var float4: Float4 { if cgColor.numberOfComponents == 4, let c = cgColor.components { Float4(Float(c[0]), Float(c[1]), Float(c[2]), Float(c[3])) } else { Float4() } } } struct ColourAction: EntityAction { // MARK: - PUBLIC PROPERTIES let startColour: Float4 let targetColour: Float4 // MARK: - PUBLIC COMPUTED PROPERTIES var animatedValueType: (any AnimatableData.Type)? { Float4.self } // MARK: - INITIATION init(startColour: UIColor, targetColour: UIColor) { self.startColour = startColour.float4 self.targetColour = targetColour.float4 } // MARK: - PUBLIC STATIC FUNCTIONS @MainActor static func registerEntityAction() { ColourAction.subscribe(to: .updated) { event in guard let animationState = event.animationState else { return } let interpolatedColour = event.action.startColour.mixedWith(event.action.targetColour, by: Float(animationState.normalizedTime)) animationState.storeAnimatedValue(interpolatedColour) } } } extension Entity { // MARK: - PUBLIC FUNCTIONS func changeColourTo(_ targetColour: UIColor, duration: Double) { guard let modelComponent = components[ModelComponent.self], let material = modelComponent.materials.first as? PhysicallyBasedMaterial else { return } let colourAction = ColourAction(startColour: material.baseColor.tint, targetColour: targetColour) if let colourAnimation = try? AnimationResource.makeActionAnimation(for: colourAction, duration: duration, bindTarget: .material(0).baseColorTint) { playAnimation(colourAnimation) } } } This doesn't work in VisionOS 26. My current fix is to directly set the material base colour - but this feels like the wrong approach: @MainActor static func registerEntityAction() { ColourAction.subscribe(to: .updated) { event in guard let animationState = event.animationState, let entity = event.targetEntity, let modelComponent = entity.components[ModelComponent.self], var material = modelComponent.materials.first as? PhysicallyBasedMaterial else { return } let interpolatedColour = event.action.startColour.mixedWith(event.action.targetColour, by: Float(animationState.normalizedTime)) material.baseColor.tint = UIColor(interpolatedColour) entity.components[ModelComponent.self]?.materials[0] = material animationState.storeAnimatedValue(interpolatedColour) } } So before I raise this as a bug, was I doing anything wrong in the former version and got lucky? Is there a better approach?

Prior to MacOS 26, Multiple Pickers could be laid out with a uniform width. For example: struct LayoutExample: View { let fruits = ["apple", "banana", "orange", "kiwi"] let veg = ["carrot", "cauliflower", "peas", "Floccinaucinihilipilification Cucurbitaceae"] @State private var selectedFruit: String = "kiwi" @State private var selectedVeg: String = "carrot" var body: some View { VStack(alignment: .leading) { Picker(selection: $selectedFruit) { ForEach(fruits, id: \.self, content: Text.init) } label: { Text("Fruity choice") .frame(width: 150, alignment: .trailing) } .frame(width: 300) Picker(selection: $selectedVeg) { ForEach(veg, id: \.self, content: Text.init) } label: { Text("Veg") .frame(width: 150, alignment: .trailing) } .frame(width: 300) } } } Renders like this, prior to MacOS26: But now looks like this under MacOS 26: Is there anyway to control the size of the picker selection in MacOS 26?

I have found that following code runs without issue from Xcode, either in Debug or Release mode, yet crashes when running from the binary produced by archiving - i.e. what will be sent to the app store. import SwiftUI import AVKit @main struct tcApp: App { var body: some Scene { WindowGroup { VideoPlayer(player: nil) } } } This is the most stripped down code that shows the issue. One can try and point the VideoPlayer at a file and the same issue will occur. I've attached the crash log: Crash log Please note that this was seen with Xcode 26.2 and MacOS 26.2.

Given that type UUID is a struct I thought it would be Sendable. But the compiler generates a warning: struct S: Sendable { var int: Int var id: UUID // &lt;-- Stored property 'id' of 'Sendable'-conforming struct 'S' has non-sendable type 'UUID' }

I'm writing a function where a directory and its descendants are scanned to produce a list of files. The function is part of a class, FileScanner. Here's a simplified version of the function: func scanFolder(_ folderURL: URL) async { // Set up configuration for directory search, varies based on need to search sub directories let resourceKeysArray: [URLResourceKey] = [.nameKey, .isDirectoryKey, .fileResourceTypeKey, .creationDateKey, .contentModificationDateKey, .contentTypeKey] let resourceKeysSet = Set&lt;URLResourceKey&gt;(resourceKeysArray) let options = FileManager.DirectoryEnumerationOptions(arrayLiteral: [.skipsHiddenFiles, .skipsPackageDescendants]) if let enumerator = FileManager.default.enumerator(at: folderURL, includingPropertiesForKeys: resourceKeysArray, options: options) { await folderScanStatus.markRunning() while await !folderScanStatus.cancelled, let fileURL = enumerator.nextObject() as? URL { print("\(id) found \(fileURL.path)") // Logging for debug purposes foundFiles.append(fileURL) } } } The code is async, as it has to call some async functions (I've left a couple in for illustration.) The user can have multiple scans in process simultaneously. For each one a new FileScanner is created, and de-inited once the scan has completed - the results are copied across elsewhere. scanFolder is called from within a Task: Task { await scanFolder(someURL) } I am finding that if two of these processes run at once, they can actually interfere with each other - i.e. one can scan the directory of the other. I added some logging to highlight the issue. The log line shows the ID of the scanner, and the file it has found. In this run there were two scanners: EDF43558-608E-47A4-81E5-97B9707B1D0F, scanning /Volumes/Back-up A/ 982EC712-D79E-4785-A1BA-3B53F85967F0, scanning /Users/TEST/ And here's some extracts from the log showing them working as expected: 982EC712-D79E-4785-A1BA-3B53F85967F0 found /Users/TEST/Files/R_24_04-04.txt EDF43558-608E-47A4-81E5-97B9707B1D0F found /Volumes/Back-up A/180704f01.txt And here's an example showing Scanner 982EC712-D79E-4785-A1BA-3B53F85967F0 finding a file that the other one also picked up: 982EC712-D79E-4785-A1BA-3B53F85967F0 found /Volumes/Back-up A/19839f92.txt : EDF43558-608E-47A4-81E5-97B9707B1D0F found /Volumes/Back-up A/19839f92.txt Any ideas why this is happening? I was under the impression FileManager was thread safe?

I'm trying to detect when two entities collide. The following code shows a very basic set-up. How do I get the upperSphere to move? If I set its physicsBody.mode to .dynamic it moves with gravity (and the collision is reported), but when in kinematic mode it doesn't respond to the impulse: struct CollisionView: View { @State var subscriptions: [EventSubscription] = [] var body: some View { RealityView { content in let upperSphere = ModelEntity(mesh: .generateSphere(radius: 0.04)) let lowerSphere = ModelEntity(mesh: .generateSphere(radius: 0.04)) upperSphere.position = [0, 2, -2] upperSphere.physicsBody = .init() upperSphere.physicsBody?.mode = .kinematic upperSphere.physicsMotion = PhysicsMotionComponent() upperSphere.generateCollisionShapes(recursive: false) lowerSphere.position = [0, 1, -2] lowerSphere.physicsBody = .init() lowerSphere.physicsBody?.mode = .static lowerSphere.generateCollisionShapes(recursive: false) let sub = content.subscribe(to: CollisionEvents.Began.self, on: nil) { _ in print("Collision!") } subscriptions.append(sub) content.add(upperSphere) content.add(lowerSphere) Task { try? await Task.sleep(for: .seconds(2)) print("Impulse applied") upperSphere.applyLinearImpulse([0, -1, 0], relativeTo: nil) } } } }

Hello, In the documentation for an ARView we see a diagram that shows that all Entity's are connected via AnchorEntity's to the Scene: https://developer.apple.com/documentation/realitykit/arview What happens when we are using a RealityView? Here the documentation suggests we direclty add Entity's: https://developer.apple.com/documentation/realitykit/realityview/ Three questions: Do we need to add Entitys to an AnchorEntity first and add this via content.add(...)? Is an Entity ignored by physics engine if attached via an Anchor? If both the AnchorEntity and an attached Entity is added via content.add(...), does is its anchor's position ignored?

Does anyone have experience of creating their own EntityActions? Say for example I wanted one that faded up the opacity of an entity, then once it had completed set another property on one of the entity's components. I understand that I could use the FromToByAction to control the opacity (and have this working), but I am interested to learn how to create my own dedicated EntityAction, and finding the documentation hard to fathom. I got as far as creating a struct conforming to EntityAction protocol: var animatedValueType: (any AnimatableData.Type)? } Subscribing to update events on this: FadeUpAction.subscribe(to: .updated) { event in guard let animationState = event.animationState else { return } // My animation state is always nil, so I never get here! let newValue = \\\Some Calc... animationState.storeAnimatedValue(newValue) } And setting it up as an animation on an entity: let action = FadeUpAction() if let animation = try? AnimationResource.makeActionAnimation( for:action, duration: 2.0, bindTarget: .opacity ) { entity.playAnimation(animation) } ...but haven't been able to understand how to extract the current timeDelta or set the value in the event handler. Any pointers?

I'm trying to build a Shader in "Reality Composer Pro" that updates from a start time. Initially I tried the following: The idea was that when the startTime was 0, the output would be 0, but then I would set startTime from within code and this would be compared with the current GPU time, and difference used to drive another part of the shader graph: if let testEntity = root.findEntity(named: "Test"), var shaderGraphMaterial = testEntity.components[ModelComponent.self]?.materials.first as? ShaderGraphMaterial { let time = CFAbsoluteTimeGetCurrent() try! shaderGraphMaterial.setParameter(name: "StartTime", value: .float(Float(time))) testEntity.components[ModelComponent.self]?.materials[0] = shaderGraphMaterial } However, I haven't found a reference to the time the shader would be using. So now I am trying to write an EntityAction to achieve the same effect. Instead of comparing a start time to the GPU's time I'm trying to animate one of the shader's uniform input. However, I'm not sure how to specify the bind target. Here's my attempt so far: import RealityKit struct ShaderAction: EntityAction { let startValue: Float let targetValue: Float var animatedValueType: (any AnimatableData.Type)? { Float.self } static func registerEntityAction() { ShaderAction.subscribe(to: .updated) { event in guard let animationState = event.animationState else { return } let value = simd_mix(event.action.startValue, event.action.targetValue, Float(animationState.normalizedTime)) animationState.storeAnimatedValue(value) } } } extension Entity { func updateShader(from startValue: Float, to targetValue: Float, duration: Double) { let fadeAction = ShaderAction(startValue: startValue, targetValue: targetValue) if let shaderAnimation = try? AnimationResource.makeActionAnimation(for: fadeAction, duration: duration, bindTarget: .material(0).customValue) { playAnimation(shaderAnimation) } } } ''' Currently when I run this I get an assertion failure: 'Index out of range (operator[]:line 797) index = 260, max = 8' Furthermore, even if it didn't crash I don't understand how to pass a binding to the custom shader value "startValue". Any clues of how to achieve this effect - even if it's a completely different way.

Hello, I'm writing an EntityAction that animates a material base tint between two different colours. However, the colour that is being actually set differs in RGB values from that requested. For example, trying to set an end target of R0.5, G0.5, B0.5, results in a value of R0.735357, G0.735357, B0.735357. I can also see during the animation cycle that intermediate actual tint values are also incorrect, versus those being set. My understanding is the the values of material base colour are passed as a SIMD4. Therefore I have a couple of helper extensions to convert a UIColor into this format and mix between two colours. Note however, I don't think the issue is with this functions - even if their outputs are wrong, the final value of the base tint doesn't match the value being set. I wondered if this was a colour space issue? import simd import RealityKit import UIKit typealias Float4 = SIMD4<Float> extension Float4 { func mixedWith(_ value: Float4, by mix: Float) -> Float4 { Float4( simd_mix(x, value.x, mix), simd_mix(y, value.y, mix), simd_mix(z, value.z, mix), simd_mix(w, value.w, mix) ) } } extension UIColor { var float4: Float4 { var r: CGFloat = 0.0 var g: CGFloat = 0.0 var b: CGFloat = 0.0 var a: CGFloat = 0.0 getRed(&r, green: &g, blue: &b, alpha: &a) return Float4(Float(r), Float(g), Float(b), Float(a)) } } struct ColourAction: EntityAction { let startColour: SIMD4<Float> let targetColour: SIMD4<Float> var animatedValueType: (any AnimatableData.Type)? { SIMD4<Float>.self } init(startColour: UIColor, targetColour: UIColor) { self.startColour = startColour.float4 self.targetColour = targetColour.float4 } static func registerEntityAction() { ColourAction.subscribe(to: .updated) { event in guard let animationState = event.animationState else { return } let interpolatedColour = event.action.startColour.mixedWith(event.action.targetColour, by: Float(animationState.normalizedTime)) animationState.storeAnimatedValue(interpolatedColour) } } } extension Entity { func updateColour(from currentColour: UIColor, to targetColour: UIColor, duration: Double, endAction: @escaping (Entity) -> Void = { _ in }) { let colourAction = ColourAction(startColour: currentColour, targetColour: targetColour, endedAction: endAction) if let colourAnimation = try? AnimationResource.makeActionAnimation(for: colourAction, duration: duration, bindTarget: .material(0).baseColorTint) { playAnimation(colourAnimation) } } } The EntityAction can only be applied to an entity with a ModelComponent (because of the material), so it can be called like so: guard let modelComponent = entity.components[ModelComponent.self], let material = modelComponent.materials.first as? PhysicallyBasedMaterial else { return } let currentColour = material.baseColor.tint let targetColour = UIColor(_colorLiteralRed: 0.5, green: 0.5, blue: 0.5, alpha: 1.0) entity.updateColour(from:currentColour, to: targetColour, duration: 2)

I have a scene built up in RealityComposerPro, in which I've added a ParticleEmitter with isEmitting set to False and 'Loop' set to True. In my app, when I toggle isEmitting to True there can be a delay of a few seconds before the ParticleEmitter starts. However, if I programatically add the emitter in code at that point, it starts immediately. To be clear, I'm seeing this on the VisionOS simulator - I don't have access to a device at this time. Am I misunderstanding how to control the ParticleEmitter when I need precise control on when it starts.

As I understand it there are two ways I can track a hand, or a joint, in RealityKit: either, create an AnchorEntity, for example AnchorEntity(.hand(.left, location: .palm)) or, set up an ARSession with a HandTrackingProvider ( a lot more code which I haven't repeated here). Assuming this is correct, when would I want to use one over the other?