Question

我尝试使用Scenekit将视频作为纹理映射到VR项目的原始圆柱体：一个嵌入在SKScene中的SKVideoNode作为SceneKit SCNTube对象的纹理，我只是不能让视频显示为静止图像。下面的PLayground代码应生成映射到柱面的移动视频，但映射不起作用：

编辑：在上市结束时添加单行修复。以下代码应该工作

import UIKit
import SceneKit      // for 3D mapping
import SpriteKit     // for SKVideoNode
import QuartzCore    // for basic animation
import XCPlayground  // for live preview
import AVFoundation  // for video playback engine

// create a scene view with an empty scene
var sceneView = SCNView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
var scene = SCNScene()
sceneView.scene = scene


// start a live preview of that view
XCPShowView("The Scene View", view: sceneView)

// default lighting
sceneView.autoenablesDefaultLighting = true

// a geometry object
var tube = SCNTube(innerRadius: 1.99, outerRadius: 2, height: 3)
var tubeNode = SCNNode(geometry: tube)
scene.rootNode.addChildNode(tubeNode)

// video scene


let urlStr = NSBundle.mainBundle().pathForResource("sample", ofType: "mp4")
let url = NSURL(fileURLWithPath: urlStr!)

let asset = AVURLAsset(URL: url, options: nil)
let playerItem = AVPlayerItem(asset: asset)
let player = AVPlayer(playerItem: playerItem)
let videoNode = SKVideoNode(AVPlayer: player)
let spritescene = SKScene(size: CGSize(width: 1211, height: 431))



videoNode.size.width=spritescene.size.width
videoNode.size.height=spritescene.size.height
spritescene.addChild(videoNode)


// configure the geometry object

var myImage = UIImage.init(named: "BandImage.jpeg")

tube.firstMaterial?.diffuse.contents  = spritescene


// set a rotation axis (no angle) to be able to
// use a nicer keypath below and avoid needing
// to wrap it in an NSValue
tubeNode.rotation = SCNVector4(x: 0.0, y: 1.0, z: 0.0, w: 0.0)

// animate the rotation of the torus
var spin = CABasicAnimation(keyPath: "rotation.w") // only animate the angle
spin.toValue = 2.0*M_PI
spin.duration = 3
spin.repeatCount = HUGE // for infinity
tubeNode.addAnimation(spin, forKey: "spin around")

// starts the video, solving the issue
    sceneView.playing = true

Answer 1

我已经在github上发布了我的代码（以及一些示例全景内容）给任何想要拥有可用示例代码或有兴趣在开源全景视频播放器上进行协作的人：

https://github.com/jglasse/OSVR

事实证明，模拟器（和游乐场）看起来并不支持此功能。将上面的代码移动到项目并在设备上运行，我终于让它工作了。

故事的寓意是 - 如果您使用SKVideoNodes作为Scenekit的纹理，请使用实际设备进行测试。

SKVideoNode（嵌入在SKScene中）作为Scene Kit节点无法正常工作的纹理

1 个答案: