Question

我正在尝试使用以下代码初始化或构造一个SCNNode。它将从服务器中提取SCN文件并将其加载到代码中。但是，似乎我无法覆盖它继续在设备/本地目录中搜索我的纹理文件的资产URL。我想知道我是否使用带有URL的SCNScene的正确语法

lazy var audiNode: SCNNode = {

    //Endpoint for SCN file
    let endpoint = URL(string: "http://jwt-auth-hosted.au-syd.mybluemix.net/hkdl-ar/tree.scn")
    //Remote directory for texture PNG file for the SCN file
    let texture = NSURL(string: "http://jwt-auth-hosted.au-syd.mybluemix.net/hkdl-ar")

    //Declare scene options for initializing SCNScene
    let assetDirURL = SCNSceneSource.LoadingOption.assetDirectoryURLs
    let isOverrideAssetURL = SCNSceneSource.LoadingOption.overrideAssetURLs

    do {
        /*
        - Declare scene with endpoint, is override asset URL = true, asset directory is texture
        - However not sure if the options are being correctly called
        */
        let scene = try SCNScene(url: endpoint!, options: [assetDirURL: [texture],isOverrideAssetURL:{1}])
        //scene is not null
        NSLog("audi scnscene: \(scene) with endpoint: \(String(describing: endpoint))")
    }
    catch let error {
        NSLog("cannot load scnscene")
    }
    //Initialize parent node
    let carNode = SCNNode()

    //Get all child nodes of the SCNScene
    let carSceneChildNodes = scene.rootNode.childNodes
    //Loop through all child nodes and add them into the parent node
    for childNode in carSceneChildNodes {
        carNode.addChildNode(childNode)
    }
    //Set scale and position of the parent node
    let scaleFactor  = 0.05
    carNode.position = SCNVector3(0,0,0)
    carNode.scale = SCNVector3(scaleFactor, scaleFactor, scaleFactor)
    NSLog("returning audi node")
    //return node to another
    return carNode
}()

所以我得到的错误是2018-07-26 19：33：34.582848 + 0800 ARKit + CoreLocation [28182：11913775] [SceneKit]错误：加载失败：C3DImage 0x1c08e1780 src：file：/// var / containers /捆绑包/应用程序/E103CC90-B45B-4111-885C-806328F27D93/ARKit+CoreLocation.app/tree.png [0.000000x0.000000]。我不确定如何正确覆盖资产网址，很高兴能为您提供帮助！

从远程服务器URL加载SCNScene

0 个答案: