Question

我正在使用Scenekit，我将一个摄像头连接到一个节点，并将一个速度应用到父节点的物理主体。但只有父节点移动并且相机保持原位。关于为什么会发生这种情况的任何想法？我需要相机在移动时仍然附着在父母身上。

代码：

    class GameViewController: UIViewController, UIGestureRecognizerDelegate, SCNSceneRendererDelegate{

    var playerObj : Player?
    var panGesture : UIPanGestureRecognizer?

    override func viewDidLoad() {
        //create view and add scene
        let sceneView = self.view as SCNView
        let scene = SCNScene()
        sceneView.delegate = self
        sceneView.scene = scene

        //create camera
//        let cameraNode = SCNNode()
//        cameraNode.camera = SCNCamera()

        //create player
        playerObj = Player()
        scene.rootNode.addChildNode(playerObj!.node)
        //create floor
        let floorGeometry = SCNFloor()
        let floorNode = SCNNode(geometry: floorGeometry)
        floorNode.physicsBody = SCNPhysicsBody(type: SCNPhysicsBodyType.Static, shape: SCNPhysicsShape(geometry: floorGeometry, options: nil))
        floorNode.position = SCNVector3Make(0, 0, 0)
        scene.rootNode.addChildNode(floorNode)
        playerObj?.node.camera = SCNCamera()

        //other setup
        sceneView.showsStatistics = true
        sceneView.allowsCameraControl = true

        scene.physicsWorld.gravity = SCNVector3Make(0, -50, 0)

        let tapGesture = UITapGestureRecognizer(target: self, action: "handleTap:")
        sceneView.gestureRecognizers?.append(tapGesture)
        panGesture = UIPanGestureRecognizer(target: self, action: "handlePan:")
        sceneView.gestureRecognizers?.append(panGesture!)

    }


    func handlePan(gestureRecognize: UIPanGestureRecognizer){
        //take coordinates and transform into direction
        if let gesture = panGesture?{
            playerObj?.node.physicsBody?.velocity = SCNVector3Make(Float(gesture.translationInView(self.view).x), 0, Float(gesture.translationInView(self.view).y))
            print(gesture.translationInView(self.view))

        if(gesture.state == UIGestureRecognizerState.Ended){
            playerObj?.node.physicsBody?.velocity = SCNVector3Make(0, 0, 0)
            gestureRecognize.setTranslation(CGPointZero, inView: self.view)

        }
        }

    }

Answer 1

你的相机可能不需要自己的物理机构。如果只需跟随其父级，您可以实现-renderer:didSimulatePhysicsAtTime:并根据其父级presentationNode的位置不断更新相机的位置。

SCNPhysicsbody速度不适用于子节点

1 个答案: