Swift 如何从 RC 加载场景作为 ModelEntity 而不是普通实体

Reality Composer's .rcproject

如果您使用的是Reality Composer的Experience.rcproject文件，请try 以下技巧.实现findEntity(named:)方法，然后使用类型转换as!操作符从RC场景中获取所需的模型实体.

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 file

苹果专有的.reality格式提供了更快的上传时间.使用以下方法将.reality个文件加载到您的3D场景中.记住，每个RealityKit的场景都是实体的层次 struct .

import UIKit
import RealityKit

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