使用ARKit锚点放置RealityKit场景 [英] Using ARKit anchor to place RealityKit Scene

问题描述

我目前正在努力将RealityKit场景添加到ARKit锚点中.作为我之前的问题，不可能将RealityKit场景直接添加到ARKit锚点.

I am currently struggling to add an RealityKit Scene to an ARKit anchor. As my previous question, it is not possible to directly add the RealityKit Scene to an ARKit Anchor Node.

但是如何使用ARKit锚来放置我的场景?例如，我想在房间里找到一个对象，然后根据找到的对象，我想使用不同的场景，然后根据识别出的对象位置将它们锚定在房间里.

But how can I use the ARKit Anchor to place my Scene? For example, I want to find an object in the room, and depending on which object I found, I want to use different scenes and anchor them in the room depending on the recognised objects position.

感谢您的帮助.

当前尝试:

func makeUIView(context: Context) -> ARView {
        
        let arView = ARView(frame: .zero)
        
        // Load the "Box" scene from the "Experience" Reality File
        let boxAnchor = try! Experience.loadBox()
        
        // Add the box anchor to the scene
        arView.scene.anchors.append(boxAnchor)
        
        let configuration = ARWorldTrackingConfiguration()
        guard let referenceObjects = ARReferenceObject.referenceObjects(
                inGroupNamed: "AR Objects", bundle: nil) else {
            fatalError("Missing expected asset catalog resources.")
        }
        
        configuration.detectionObjects = referenceObjects
        arView.session.run(configuration) // not possible at arview, but i need arview for the .rcproject :-/
        
        return arView
        
    }

添加代码

推荐答案

ARKit没有节点.SceneKit可以.

ARKit has no nodes. SceneKit does.

但是，如果您需要使用ARKit的锚点将RealityKit的模型放置到AR场景中，就这么简单:

However, if you need to place RealityKit's model into AR scene using ARKit's anchor, it's as simple as this:

import ARKit
import RealityKit

class ViewController: UIViewController {
    
    @IBOutlet var arView: ARView!
    let boxScene = try! Experience.loadBox()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        arView.session.delegate = self
        
        let entity = boxScene.steelBox
        
        var transform = simd_float4x4(diagonal: [1,1,1,1])
        transform.columns.3.z = -3.0  // three meters away
        
        let arkitAnchor = ARAnchor(name: "ARKit anchor",
                              transform: transform)
        
        let anchorEntity = AnchorEntity(anchor: arkitAnchor)
        anchorEntity.name = "RealityKit anchor"
        
        arView.session.add(anchor: arkitAnchor)
        arView.scene.anchors.append(anchorEntity)
    }
}

这有可能要归功于AnchorEntity便捷初始化程序:

It's possible thanks to the AnchorEntity convenience initializer:

convenience init(anchor: ARAnchor)

还可以使用 session(_:didAdd:)和 session(_:didUpdate:)实例方法:

Also you can use session(_:didAdd:) and session(_:didUpdate:) instance methods:

extension ViewController: ARSessionDelegate {
        
    func session(_ session: ARSession, didUpdate anchors: [ARAnchor]) {
            
        guard let objectAnchor = anchors.first as? ARObjectAnchor
        else { return }
            
        let anchor = AnchorEntity(anchor: objectAnchor)
        let entity = boxScene.steelBox
        anchor.addChild(entity)
        arView.session.add(anchor: objectAnchor)
        arView.scene.anchors.append(anchor)
    }
}

这篇关于使用ARKit锚点放置RealityKit场景的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！