Mac 3D graphic by game template (III) Create 3D objects by DAE file

Ref: 1. http://stackoverflow.com/questions/25356301/how-do-you-load-a-dae-file-into-an-scnnode-in-ios-scenekit
        2. https://www.weheartswift.com/introduction-scenekit-part-2/
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Ref1 將匯入的DAE檔案轉為node物件，再加入至場景內
1. 開啟遊戲範本專案
2. GameViewController.swft2.1 關閉ship節點與“動畫”指令
2.2 參考Ref1將DAE檔案轉為節點，並加入場景
...

        // create a new scene

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

        let scene = SCNScene();

        //-- 2016-8-10

        var nodeS = SCNNode()

        let sceneS = SCNScene(named: "mug.dae")

        var nodeArrayS = sceneS!.rootNode.childNodes

        

        for childNode in nodeArrayS {

            nodeS.addChildNode(childNode as SCNNode)

        }

        scene.rootNode.addChildNode(nodeS)

        // create and add a camera to the scene

        let cameraNode = SCNNode()

...

3. 結果

4. 參考Ref1，將DAE轉換node動作轉為方法．

class GameViewController: UIViewController {

    //----- Def DAE2Node方法

    func collada2SCNNode(filepath:String) -> SCNNode {

    var node = SCNNode()

    let scene = SCNScene(named: filepath)

    var nodeArray = scene!.rootNode.childNodes

    

    for childNode in nodeArray {

    node.addChildNode(childNode as SCNNode)

    }

    return node

    }

    //------

    override func viewDidLoad() {

        super.viewDidLoad()

...

//-- 2016-8-10-B

        /*

        var nodeS = SCNNode()

        let sceneS = SCNScene(named: "mug.dae")

        var nodeArrayS = sceneS!.rootNode.childNodes

        

        for childNode in nodeArrayS {

            nodeS.addChildNode(childNode as SCNNode)

        }

        */

        let nodeS = collada2SCNNode("mug.dae")

        

        scene.rootNode.addChildNode(nodeS)

...

5. 用迴圈呼叫方法，產生系列3D物件
...
*/

for zz in 1...3 {

        let nodeS = collada2SCNNode("mug.dae")

        nodeS.position = SCNVector3(x:0, y:0, z:Float(zz)*3)

        scene.rootNode.addChildNode(nodeS)

        }

...
6. 結果