我想制作一个可用于从我的网站动态下载各种目标的系统,而无需使用“云”系统。
我也想将数据集保存为.xml和.dat格式,然后从保存设备中激活它们。
使用vuforia和unity可以有很多方法和页面,但是不幸的是,当我测试它时,我收到了所有错误。
看来我的代码有误,或者vuforia类已更改。
例如,请查看此链接:
https://developer.vuforia.com/library/articles/Solution/Unity-Load-DataSet-from-SD-Card
我得到了错误:使用Vuforia。
我将.xml和.dat文件放在“ Application.persistentDataPath +” /“ +” Building1.xml“中
我使用此脚本“ DataSetLoadBehavior”,该脚本附加了“ AR摄像机并将代码放入其中。我收到一个错误:
NullReferenceException:对象引用未设置为的实例
对象DataSetLoadBehaviour.OnInitialized()(在Assets / Qualcomm
增强现实/脚本/DataSetLoadBehaviour.cs:49)
DataSetLoadBehaviour.Start()(在Assets / Qualcomm Augmented中
现实/脚本/DataSetLoadBehaviour.cs:80)
我的代码是这样的:
unity 4.2 pro和vuforia 2.8.9或3.0.9
/*==============================================================================
Copyright (c) 2010-2014 Qualcomm Connected Experiences, Inc.
All Rights Reserved.
Confidential and Proprietary - Qualcomm Connected Experiences, Inc.
==============================================================================*/
using System.Collections.Generic;
using UnityEngine;
/// <summary>
/// This behaviour allows to automatically load and activate one or more DataSet on startup
/// </summary>
public class DataSetLoadBehaviour : DataSetLoadAbstractBehaviour
{
[HideInInspector, SerializeField]
public List<string> mDataSetsToActivate2 = new List<string>();
[SerializeField, HideInInspector]
public List<string> mDataSetsToLoad2 = new List<string>();
protected DataSetLoadBehaviour()
{
}
private void OnDestroy()
{
QCARAbstractBehaviour behaviour = (QCARAbstractBehaviour) UnityEngine.Object.FindObjectOfType(typeof(QCARAbstractBehaviour));
if (behaviour != null)
{
}
}
public void OnInitialized()
{
if (QCARRuntimeUtilities.IsQCAREnabled())
{
foreach (string str in this.mDataSetsToLoad2)
{
if (!DataSet.Exists(str, QCARUnity.StorageType.STORAGE_ABSOLUTE))
{
Debug.LogError("Data set " + str + " does not exist.");
}
else
{
ImageTracker tracker = TrackerManager.Instance.GetTracker<ImageTracker>();
DataSet dataSet = tracker.CreateDataSet();
if (!dataSet.Load(str))
{
Debug.LogError("Failed to load data set " + str + ".");
}
else if (this.mDataSetsToActivate2.Contains(str))
{
tracker.ActivateDataSet(dataSet);
}
}
}
}
}
public void OnTrackablesUpdated()
{
}
private void Start()
{
QCARAbstractBehaviour behaviour = (QCARAbstractBehaviour) UnityEngine.Object.FindObjectOfType(typeof(QCARAbstractBehaviour));
if (behaviour != null)
{
mDataSetsToLoad2.Add(Application.persistentDataPath + "/" + "Building1.xml");
OnInitialized();
}
}
public override void AddOSSpecificExternalDatasetSearchDirs()
{
#if UNITY_ANDROID
if (Application.platform == RuntimePlatform.Android)
{
// Get the external storage directory
AndroidJavaClass jclassEnvironment = new AndroidJavaClass("android.os.Environment");
AndroidJavaObject jobjFile = jclassEnvironment.CallStatic<AndroidJavaObject>("getExternalStorageDirectory");
string externalStorageDirectory = jobjFile.Call<string>("getAbsolutePath");
// Get the package name
AndroidJavaObject jobjActivity = new AndroidJavaClass("com.unity3d.player.UnityPlayer").GetStatic<AndroidJavaObject>("currentActivity");
string packageName = jobjActivity.Call<string>("getPackageName");
// Add some best practice search directories
//
// Assumes just Vufroria datasets extracted to the files directory
AddExternalDatasetSearchDir(externalStorageDirectory + "/Android/data/" + packageName + "/files/");
// Assume entire StreamingAssets dir is extracted here and our datasets are in the "QCAR" directory
AddExternalDatasetSearchDir(externalStorageDirectory + "/Android/data/" + packageName + "/files/QCAR/");
}
#endif //UNITY_ANDROID
}
void Update()
{
}
}
最佳答案
是的,Vuforia发生了很大变化。
现在,您必须包含Vuforia
作为标题,才能使其正常工作
using Vuforia;
希望这行得通。
如果显示未找到Vuforia,则可能是因为您尚未导入Vuforia的Unity软件包。您可以遵循这些instructions。
另外,我相信您没有按照Migrating your Unity Project的步骤进行操作。新的Vuforia不再支持
ImageTracker
,因此您必须将ImageTracker
的所有实例更改为ObjectTracker
关于c# - 动态加载和激活数据集(Vuforia和Unity),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/29765840/