Mac 3D graphic by game template

Ref: https://www.weheartswift.com/introduction-scenekit-part-1/
Macbook pro (OS X EI Captian 10.11.5)
Xcode 7.3.1
案例以Game Template 開始，移除原範本加入的Ship與動畫(Animation)，再參考範例加入3D物件
1. 開啟遊戲範本專案
2. GamViewController.swift

class GameViewController: UIViewController {

    override func viewDidLoad() {

        super.viewDidLoad()

        

        // create a new scene 1.3 移除 ship 物件

        // let scene = SCNScene(named: "art.scnassets/ship.scn")!

        // 1.4 add Empty SCNScene 建置空場景

        let scene = SCNScene()

        // 1.5 加入圓

        let sphereGeometry = SCNSphere(radius: 1.0)

        sphereGeometry.firstMaterial?.diffuse.contents = UIColor.orangeColor()

        let sphereNode = SCNNode(geometry: sphereGeometry)

        scene.rootNode.addChildNode(sphereNode)

        

        // create and add a camera to the scene  0.1 加入相機

        let cameraNode = SCNNode()

        cameraNode.camera = SCNCamera()

        scene.rootNode.addChildNode(cameraNode)

        

        // place the camera

        cameraNode.position = SCNVector3(x: 0, y: 0, z: 15)

        

        // create and add a light to the scene 0.2 加入Omni光源

        let lightNode = SCNNode()

        lightNode.light = SCNLight()

        lightNode.light!.type = SCNLightTypeOmni

        lightNode.position = SCNVector3(x: 0, y: 10, z: 10)

        scene.rootNode.addChildNode(lightNode)

        

        // create and add an ambient light to the scene

        let ambientLightNode = SCNNode()

        ambientLightNode.light = SCNLight()

        ambientLightNode.light!.type = SCNLightTypeAmbient

        ambientLightNode.light!.color = UIColor.darkGrayColor()

        scene.rootNode.addChildNode(ambientLightNode)

        

        // retrieve the ship node 1.1 移除 ship 動畫

        //let ship = scene.rootNode.childNodeWithName("ship", recursively: true)!

        

        // animate the 3d object 1.2 移除 ship 動畫

        //ship.runAction(SCNAction.repeatActionForever(SCNAction.rotateByX(0, y: 2, z: 0, duration: 1)))

        

        // retrieve the SCNView

        let scnView = self.view as! SCNView

        

        // set the scene to the view

        scnView.scene = scene

        

        // allows the user to manipulate the camera

        scnView.allowsCameraControl = true

        

        // show statistics such as fps and timing information

        scnView.showsStatistics = true

        

        // configure the view

        scnView.backgroundColor = UIColor.blackColor()

        

        // add a tap gesture recognizer

        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))

        scnView.addGestureRecognizer(tapGesture)

    }

3. Result