Reality Composer的.rcproject

如果您使用Reality Composer的Experience.rcproject文件，请尝试以下技术。实现findEntity(named:)方法，然后使用typecast as!操作符从RC场景中抓取所需的模型实体。

import UIKit
import RealityKit

class ViewController: UIViewController {
    
    @IBOutlet var arView: ARView!
    typealias ModelPack = ModelEntity & HasPhysicsBody
    
    override func viewDidLoad() {
        super.viewDidLoad()

        let scene1 = try! Experience.loadBox()
        let scene2 = try! Experience.loadHexagon()
        
        print(scene1); print(scene2)
        
        let boxModel = scene1.findEntity(named: "simpBld_root") as! ModelPack
        let hexModel = scene2.findEntity(named: "simpBld_root") as! ModelPack
        boxModel.position.x = -0.075
        hexModel.position.x = 0.075
        
        let anchor = AnchorEntity()     // any RealityKit or ARKit anchor
        anchor.scale *= 3
        anchor.addChild(boxModel)
        anchor.addChild(hexModel)
        
        arView.scene.anchors.append(anchor)
    }
}

.reality文件

Apple专有的.reality可加快上传速度。使用以下方法将.reality文件加载到3D场景中。记住每个RealityKit的场景都是实体的层次结构。

import UIKit
import RealityKit

class ViewController: UIViewController {
    
    @IBOutlet var arView: ARView!
    typealias ModelPack = ModelEntity & HasPhysicsBody
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let entity = try! Entity.load(named: "SomeScene.reality")
        print(entity)
        
        let boxModel = entity.findEntity(named: "simpBld_root") as! ModelPack
        
        let anchor = AnchorEntity(.face)
        anchor.addChild(boxModel)
        arView.scene.anchors.append(anchor)
    }
}