我正在尝试修改 Xcode 的默认游戏设置,以便我可以:将动画编程到几何体中,浏览该动画,并让用户自动播放动画。
我设法通过根据擦洗器的值设置 View 的场景时间来使动画擦洗工作。但是,当我将 SCNSceneRenderer 上的 isPlaying bool 值设置为 true 时,它会将每一帧的时间重置为 0,我无法让它离开第一帧。
从文档中,我假设这意味着它不会检测到我的动画,并认为所有动画的持续时间都是 0。
这是我的 GameViewController 中的 viewDidLoad 函数:
override func viewDidLoad() {
super.viewDidLoad()
// create a new scene
let scene = SCNScene(named: "art.scnassets/ship.scn")!
// create and add a camera to the scene
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
let lightNode = SCNNode()
lightNode.light = SCNLight()
lightNode.light!.type = .omni
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 = .ambient
ambientLightNode.light!.color = UIColor.darkGray
scene.rootNode.addChildNode(ambientLightNode)
// retrieve the ship node
let ship = scene.rootNode.childNode(withName: "ship", recursively: true)!
// define the animation
//ship.runAction(SCNAction.repeatForever(SCNAction.rotateBy(x: 0, y: 2, z: 0, duration: 1)))
let positionAnimation = CAKeyframeAnimation(keyPath: "position.y")
positionAnimation.values = [0, 2, -2, 0]
positionAnimation.keyTimes = [0, 1, 3, 4]
positionAnimation.duration = 5
positionAnimation.usesSceneTimeBase = true
// retrieve the SCNView
let scnView = self.view as! SCNView
scnView.delegate = self
// add the animation
ship.addAnimation(positionAnimation, forKey: "position.y")
// 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.black
// add a tap gesture recognizer
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_))
scnView.addGestureRecognizer(tapGesture)
// play the scene
scnView.isPlaying = true
//scnView.loops = true
}
感谢任何帮助!
引用资料:
场景时间:
https://developer.apple.com/documentation/scenekit/scnscenerenderer/1522680-scenetime
正在播放:
https://developer.apple.com/documentation/scenekit/scnscenerenderer/1523401-isplaying
相关问题:
SceneKit SCNSceneRendererDelegate - renderer function not called
我无法让它以一种优雅的方式工作,但我通过添加这个 Timer 调用来修复它:
Timer.scheduledTimer(timeInterval: timeIncrement, target: self, selector: (#selector(updateTimer)), userInfo: nil, repeats: true)
timeIncrement 是一个 Double 设置为 0.01,updateTimer 是如下函数:
// helper function updateTimer
@objc func updateTimer() {
let scnView = self.view.subviews[0] as! SCNView
scnView.sceneTime += Double(timeIncrement)
}
我确信有更好的解决方案,但这可行。
关于ios - 使用 Scenekit 场景时间来擦洗动画 iOS,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50650615/
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