Using Azure Spatial Anchors, cloud portion on native anchor keeps returning null

so I am using azure spatial anchors in my application and whenever i try to save an anchor to azure, i get a CloudSpatialException because the cloud anchor on my native anchor returns null. this is the code i am using to get the native anchor and save it to azure:


protected virtual async Task SaveCurrentObjectAnchorToCloudAsync()
{
CloudNativeAnchor nativeAnchor = spawnedObject.GetComponent<CloudNativeAnchor>();
if(nativeAnchor.CloudAnchor == null)
{
feedback.text = "The cloud portion on the\nnative anchor is null";
nativeAnchor.NativeToCloud();
}

CloudSpatialAnchor spatialAnchor = nativeAnchor.CloudAnchor;

while (!CloudManager.IsReadyForCreate)
{
await Task.Delay(330);
float createProgess = CloudManager.SessionStatus.RecommendedForCreateProgress;
feedback.text = $"Move your device to capture more\nof your environment: {createProgess:0%}";
}

bool success = false;

feedback.text = "Saving anchor to Azure...";

try
{
feedback.text = "We are in try block";
await CloudManager.CreateAnchorAsync(spatialAnchor);
currentSpatialAnchor = spatialAnchor;
feedback.text = $"Saving anchor...\nCloud spatial anchor ID: {currentSpatialAnchor.Identifier}";
success = currentSpatialAnchor != null;
if(success && !isErrorActive)
{
feedback.text = "Saving anchor was a success";
await OnSaveCloudAnchorSuccessfulAsync();
}
else
{
feedback.text = "Saving anchor was a failure";
OnSaveCloudAnchorFailed(new Exception("Failed to save, but no exception was thrown"));
}
}
catch(Exception ex)
{
OnSaveCloudAnchorFailed(ex);
}
}

 

I had the same issue, it appears there is a bug in the SDK that fails to create a reference to the cloud anchor. A workaround is to modify the CloudToNative method:

Code (CSharp):

1. public void CloudToNative(CloudSpatialAnchor cloudAnchor)
2.         {
3.             // Validate
4.             if (cloudAnchor == null) { throw new ArgumentNullException(nameof(cloudAnchor)); }
5.  
6.             // Apply and store updated native anchor
7.             nativeAnchor = gameObject.ApplyCloudAnchor(cloudAnchor);
8.             this.cloudAnchor = cloudAnchor;
9.         }

See this issue for more info: https://github.com/Azure/azure-spatial-anchors-samples/issues/113