如何通过平移手势旋转SCNSphere /节点

Question

因此对于个人项目，我决定在SceneKit中制作自己的相机，该相机基本上复制了默认的相机控件，除非用户放大时播放响亮的声音，缩小时反之亦然。另外，我还希望当用户在球上晃动时声音会更快。我知道如何编辑声音，但我在执行平移手势时遇到了问题。

这里是我的相机代码

let camera = SCNCamera() 
     //contructing the camera 
            camera.usesOrthographicProjection = true 
            camera.orthographicScale = 5 
            let cameraNode = SCNNode() 
            cameraNode.camera = camera 
            cameraNode.position = SCNVector3Make(0, 0, 15) 
            scene.rootNode.addChildNode(cameraNode) 
               
     //adding a pan recognizer (This doesn’t work) 
            var panRecognizer = UIPanGestureRecognizer(target: self, action: "panGesture:") 
            sceneView.addGestureRecognizer(panRecognizer) 

            //adding a pinch recognizer (This works) 
            var pinchRecognizer = UIPinchGestureRecognizer(target: self, action: "pinchGesture:") 
            sceneView.addGestureRecognizer(pinchRecognizer) 
                     
            sceneView.scene = scene  
             
        } 
         
         
        super.viewDidAppear(animated) 
        sceneSetup() 
    } 

那么这里就是我的移动手势代码，这不马上工作。相反，它会以错误的方向旋转。

func panGesture(sender: UIPanGestureRecognizer) { 
    //getting the CGpoint at the end of the pan 
        let translation = sender.translationInView(sender.view!) 
    //creating a new angle in radians from the x value 
        var newAngle = (Float)(translation.x)*(Float)(M_PI)/180.0 
    //current angle is an instance variable so i am adding the newAngle to the newAngle to it 
        newAngle += currentAngle 

        //transforming the sphere node 
        geometryNode.transform = SCNMatrix4MakeRotation(newAngle, Float(translation.x), Float(translation.y),Float(0.0)) 
         
        //getting the end angle of the swipe put into the instance variable 
        if(sender.state == UIGestureRecognizerState.Ended) { 
            currentAngle = newAngle 
        } 
         
      } 

Answer 1

我想通了，它一直在工作，只是照明设备看起来没有任何动作。相反，我需要旋转灯光。