Quickly track your hands

Hi @lijiaxu ,

If you mean how you can use an AnchorEntity in an immersive space to add entities that are tracked to your hand, here's a code snippet on how to do that. One thing to note here, AnchorEntities cannot receive collision events with other entities since they're in different coordinate spaces.

struct HandAnchoredEntityView: View {
    var body: some View {
        RealityView { content, attachments in
            
            // Create an `AnchorEntity` anchored to the head.
            let handAnchor = AnchorEntity(.hand(.right, location: .indexFingerTip)) // choose any location  here
            // Add the anchor to the scene.
            content.add(handAnchor)
            
            // Find the entity for the attachment. You can also use an entity loaded from Reality Composer Pro
            if let entity = attachments.entity(for: "handAttachment") {
                handAnchor.addChild(entity)
            }
        } attachments: {
            Attachment(id: "handAttachment") {
                VStack {
                    Text("hello world")
                }
                .padding()
                .glassBackgroundEffect()
            }
        }
    }
}

Got it, sorry for the misunderstanding! You can use https://developer.apple.com/documentation/realitykit/anchoringcomponent/trackingmode-swift.struct/predicted

Try this:

 let handAnchor = AnchorEntity(.hand(.right, location: .indexFingerTip), trackingMode: .predicted)
            // Add the anchor to the scene.
            content.add(handAnchor)
            
            // Find the entity for the attachment.
            if let entity = attachments.entity(for: "handAttachment") {
                handAnchor.addChild(entity)
            }