RealityKit – 如何将视频材质添加到 ModelEntity?

问题描述：

我使用代码在 RealityKit 中添加图片纹理，效果很好.

I use the code to add a picture texture in RealityKit and it works fine.

var material = SimpleMaterial()

material.baseColor = try! .texture(.load(named: "image.jpg"))

我尝试用这段代码将视频文件添加为纹理，但是崩溃了！！！

I try to use this code to add a video file to be a texture, but it crashes!!!

guard let url = Bundle.main.url(forResource: "data", withExtension: "mp4") else {
    return
}
material.baseColor = try! .texture(.load(contentsOf: url))

如何添加视频文件?

答

您可以使用视频纹理仅在 RealityKit 2.0 中(需要带有 iOS 14 目标的 Xcode 12).以前版本的 RealityKit 不支持视频材料.

You can use video textures only in RealityKit 2.0 (Xcode 12 with iOS 14 target is needed). A previous version of RealityKit doesn't support video materials.

这是一个向您展示如何应用它的代码:

Here's a code showing you how to apply it:

import AVKit
import RealityKit

@IBOutlet var arView: ARView!

// AVPLAYER
guard let pathToVideo = Bundle.main.path(forResource: "video", ofType: "mp4") 
else { 
    return 
}
let videoURL = URL(fileURLWithPath: pathToVideo)
let avPlayer = AVPlayer(url: videoURL)

// ENTITY
let mesh = MeshResource.generatePlane(width: 1.92, depth: 1.08)    // 16:9 video
let material = VideoMaterial(avPlayer: avPlayer)
let planeEntity = ModelEntity(mesh: mesh, materials: [material])

// ANCHOR
let anchor = AnchorEntity(.plane(.vertical,
                            classification: .wall,
                             minimumBounds: [0.3, 0.3])
anchor.addChild(planeEntity)
arView.scene.anchors.append(anchor)

// PLAYBACK
avPlayer.play()

此外，您可以通过这种方式添加VideoMaterial:

Also, you can add VideoMaterial this way:

// AVPLAYER and PlayerItem
let url = Bundle.main.url(forResource: "aaa",
                        withExtension: "mp4")
let asset = AVAsset(url: url!)
let playerItem = AVPlayerItem(asset: asset)
let avPlayer = AVPlayer()
    
// ENTITY
let mesh = MeshResource.generateSphere(radius: 1)
let material = VideoMaterial(avPlayer: avPlayer)
let entity = ModelEntity(mesh: mesh, materials: [material])
    
// ANCHOR
let anchor = AnchorEntity(world: [0,0,-10])
anchor.addChild(entity)
arView.scene.anchors.append(anchor)
    
// PLAYBACK
avPlayer.replaceCurrentItem(with: playerItem)
avPlayer.play()

RealityKit – 如何将视频材质添加到 ModelEntity?

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