Discuss augmented reality and virtual reality app capabilities.

Posts under AR / VR tag

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RealityKit visionOS anchor to POV
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!
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Dec ’24
PortalComponent – allow world content to peek out
Hello, I've been tinkering with PortalComponent on visionOS a bit but noticed that the content of the WorldComponent is always clipped to the mesh geometry of whatever entities have the PortalComponent applied. Now I'm wondering if there is any way or trick to allow contents of the portal to peek out – similar to the Encounter Dinosaurs experience on Vision Pro (I assume it also uses PortalComponent?). I saw that PortalComponent has a clippingPlane property (https://developer.apple.com/documentation/realitykit/portalcomponent/clippingplane-swift.property). But so far I haven't been able to achieve a perceptible visual difference with it. If possible I would like to avoid hacky tricks using duplicate meshes or similar to achieve this. Thanks for any hints!
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Dec ’24
How do we author a "reality file" like the ones on Apple's Gallery?
How do we author a Reality File like the ones under Examples with animations at https://developer.apple.com/augmented-reality/quick-look/ ?? For example, "The Hab" : https://developer.apple.com/augmented-reality/quick-look/models/hab/hab_en.reality Tapping on various buttons in this experience triggers various complex animations. I don't see any way to accomplish this in Reality Composer. And I don't see any way to export/compile to a "reality file" from within Xcode. How can I use multiple animations within a single GLTF file? How can I set up multiple "tap target" on a single object, where each one triggers a different action? How do we author something similar? What tools do we use? Thanks
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Nov ’24
Timeline, behaviors in RCP and xcode
Hi, every one! I'm trying to bind timeline(animation + audio) and behaviors on an entity in reality composer pro. In xcode, I need to clone this entity and use the behavior, but I found that the behaviors are not clone(send notification but not received by reality composer pro and not execute the timeline). How can I solve this problem? Thanks!
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Nov ’24
Xcode 16 cannot load AR scenes from .rcproject files
Ever since updating to Xcode 16 my AR app doesn't compile, because Xcode doesn't recognize the .rcproject files used to load the AR experiences in iOS app. The .rcproject files were authored in Reality Composer on iPadOS. The expected behavior is described in this official Apple documentation article: https://developer.apple.com/documentation/realitykit/loading-entities-from-a-file How do I submit a ticket to Apple?
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Nov ’24
How to use `unproject(_:from:to:ontoPlane:)` of Content of RealityView
When using ARView of RealityKit, I can code like this let results = arView.raycast(from: point, allowing: .estimatedPlane, alignment: .any) to get the 3D position of where I tap on the plane. In iOS 18, we can use RealityView and I found that unproject(_:from:to:ontoPlane:) may implement the same function, but I don't know how to set the ontoPlane parameter. Can someone help me with some code snippets?
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Nov ’24