loadModel.swift

func loadModel(named: String, result: ARRaycastResult) {

    var usdzToLoad: String = ""

    switch named {
    case "DYNO":
        usdzToLoad = "toy_robot_vintage"
    default:
        break;
    }

    DispatchQueue.main.async {
        let modelToLoad = try! Entity.load(named: usdzToLoad)

        switch named {
        case "DYNO":
            modelToLoad.name = "DYNO"
        default:
            break;
        }

        let anchor = AnchorEntity(plane: .horizontal, classification: .any, minimumBounds: [0.1, 0.1])
            anchor.position.y = 0.01
            anchor.addChild(modelToLoad)

        // Create a "Physics" model of the toy in order to add physics mode
        guard let modelEntity = modelToLoad as? HasPhysics else { return }

        self.arView.installGestures([.rotation], for: modelEntity)

        modelEntity.generateCollisionShapes(recursive: true)
        modelEntity.physicsBody = PhysicsBodyComponent(shapes: [.generateBox(size: .one)],
                                                       mass: 1.0,
                                                       material: .default,
                                                       mode: .kinematic)

        self.currentEntity = modelEntity
        self.anchorsEntities.append(anchor)

        self.arView.scene.addAnchor(anchor)

        let robotAnimationResource = self.currentEntity?.availableAnimations.first

        self.currentEntity!.playAnimation(robotAnimationResource!.repeat(duration: .infinity),
                                         transitionDuration: 1.25,
                                               startsPaused: false)
    }
}