【发布时间】:2016-02-11 22:33:04
【问题描述】:
我正在使用一种非常简单的方法来设置 SKVideoNode 并通过几何体的漫反射内容将其放置在 SCNNode 中。当我这样做时,纹理更新并正确显示视频的唯一时间是相机或节点移动时。当两者都静止时,纹理永远不会更新(就像视频甚至没有播放一样),但声音会播放。
显然它仍在播放视频,但渲染不正确。我不知道为什么。
func setupAndPlay() {
// create the asset & player and grab the dimensions
let path = NSBundle.mainBundle().pathForResource("indycar", ofType: "m4v")!
let asset = AVAsset(URL: NSURL(fileURLWithPath: path))
let size = asset.tracksWithMediaType(AVMediaTypeVideo)[0].naturalSize
let player = AVPlayer(playerItem: AVPlayerItem(asset: asset))
// setup the video SKVideoNode
let videoNode = SKVideoNode(AVPlayer: player)
videoNode.size = size
videoNode.position = CGPoint(x: size.width * 0.5, y: size.height * 0.5)
// setup the SKScene that will house the video node
let videoScene = SKScene(size: size)
videoScene.addChild(videoNode)
// create a wrapper ** note that the geometry doesn't matter, it happens with spheres and planes
let videoWrapperNode = SCNNode(geometry: SCNSphere(radius: 10))
videoWrapperNode.position = SCNVector3(x: 0, y: 0, z: 0)
// set the material's diffuse contents to be the video scene we created above
videoWrapperNode.geometry?.firstMaterial?.diffuse.contents = videoScene
videoWrapperNode.geometry?.firstMaterial?.doubleSided = true
// reorient the video properly
videoWrapperNode.scale.y = -1
videoWrapperNode.scale.z = -1
// add it to our scene
scene.rootNode.addChildNode(videoWrapperNode)
// if I uncomment this, the video plays correctly; if i comment it, the texture on the videoWrapperNode only
// get updated when I'm moving the camera around. the sound always plays properly.
videoWrapperNode.runAction( SCNAction.repeatActionForever( SCNAction.rotateByAngle(CGFloat(M_PI * 2.0), aroundAxis: SCNVector3(x: 0, y: 1, z: 0), duration: 15.0 )))
videoNode.play()
}
有没有人遇到过类似的事情?任何帮助将不胜感激。
【问题讨论】:
-
请注意,在最新版本的 SceneKit 中使用
SKScene和SKVideoNode是不必要的。您可以直接将AVPlayer设置为SCNMaterialProperty实例的内容。
标签: ios swift avfoundation scenekit