如何通过平移手势旋转 SCNSphere/Node

Question

所以对于个人项目，我决定在 SceneKit 中制作我自己的相机，基本上复制默认相机控件，除了当用户放大时，会播放响亮的声音，缩小时反之亦然。此外，我还希望当用户平移球时声音会更快。我知道如何编辑声音，但我无法实现平移手势。

这是我的相机代码

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()
    }

那么这是我的平移手势代码，目前无法使用。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，只是灯光使它看起来像什么都没有动过。相反，我需要旋转灯光。