AsyncOperationHandle.PercentComplete not updating when given as a Parameter in Function

You can access it in 1.14 now.

 

PercentComplete

is finally working for me in Addressables 1.15.1. It jumps from 0 to 0.75 in one frame though, and then continuing to slowly increment PercentComplete value while it loads the bundle. This is in a empty project where I tested the new version, with the following code:

Code (CSharp):

1.  
2. private IEnumerator PreloadConfirmation()
3. {
4.         var downloadOperationHandle = Addressables.GetDownloadSizeAsync(label);
5.         //...
6.         var asyncOperationHandle = Addressables.DownloadDependenciesAsync(label);
7.         StartCoroutine(DownloadProgress(asyncOperationHandle, downloadSizeMbytes));
8. }
9.  
10. private IEnumerator DownloadProgress(AsyncOperationHandle operationHandle, float downloadSizeMBytes)
11.         {
12.             while (!operationHandle.IsDone)
13.             {
14.                 yield return null;
15.                 if (operationHandle.Status == AsyncOperationStatus.Failed)
16.                 {
17.                     Debug.LogException(operationHandle.OperationException);
18.                     yield break;
19.                 }
20.            
21.                 var downloadedSizeMbComplete = operationHandle.PercentComplete * downloadSizeMBytes;
22.                 Debug.Log($"{operationHandle.PercentComplete * 100f:F2}% ({downloadedSizeMbComplete:F2}/{downloadSizeMBytes:F2} MB)");
23.             }
24.        
25.             Debug.Log("Download complete");
26.         }

For now I am happy that it at least works. So I am moving on, let me know if you need me to report this as a bug @unity_bill

Using Unity 2019 LTS (2019.4.9f1)

PS. Nice to see more documentation being added. I hope you will add example code snippets soon though, that would probably help a lot and make it less confusing to new users.

*EDIT* Tested on both remote (AWS S3) and local server (localhost). Play mode set to Use Existing Build.

 

why the progress not started from 0,
i cant show the user how many bytes have been downloaded,
because its not accurate, but its working its just the percentage is not accurate not even close

 

@hazuhiro Yeah, I use a workaround for now though - and just lerp the percentage from its initial value as 0 to 100. Hopefully they will get this fixed soon.

 

can you show me some example sir?

 

I did this exact thing as well, haha.

@hazuhiro it would look a bit like this:

Code (CSharp):

1. var downloadTotal = await Addressables.GetDownloadSizeAsync(key: locations).Task;
2.  
3. while (!downloadOp.IsDone)
4. {
5.     await Task.Yield();
6.  
7.     var bytesDownloaded = (long)Mathf.Lerp(0, downloadTotal, downloadOp.PercentComplete);
8.  
9.     Debug.Log($"Bytes downloaded so far [{bytesDownloaded}]");
10. }

 

but still, the percent complete is not start from 0, it will jump directly around 0.8

 

I just remap the values from the initial first PercentComplete (above 0).

Code (CSharp):

1.  
2. var totalDownloadSizeMb = downloadSize / 1024f / 1024f;
3. var percentComplete = 0f;
4. var minPercentComplete = 0f;
5.  
6. while(!op.isDone)
7. {
8.      await UniTask.NextFrame();
9.      //....
10.      if (!(op.PercentComplete > percentComplete)) continue;
11.          
12.      if (minPercentComplete <= Mathf.Epsilon) minPercentComplete = op.PercentComplete;
13.      percentComplete = (op.PercentComplete - minPercentComplete) / (1f - minPercentComplete);
14.  
15.      var downloadedSizeMbComplete = percentComplete * downloadSize / 1024 / 1024;
16.      Debug.Log($"{percentComplete*100:F0}% ({downloadedSizeMbComplete:F2}/{totalDownloadSizeMb:F2} MB)");
17. }
18.  
19. Debug.Log($"Download {op.Status}.");
20.  

 

this solution work, thanks sir

 

I found this gem today

op.GetDownloadStatus()

. I couldn't find it in the documentation but it seems to work great so far - no need for calculating your own PercentComplete and/or downloaded bytes and total downloaded bytes.

 

The latest update solves the problem by introducing the downloaded and total bytes! YEEHAAAA!

 

Just to clarify, @Kobald-Klaus is talking about GetDownloadStatus() which was added in Addressables 1.14.2.

• Added GetDownloadStatus method to AsyncOperationHandle. The DownloadStatus struct returned will contain the total number of bytes needed to be downloaded and the current number of bytes already downloaded. Cached AssetBundles will not be included in the count and if everything is cached, the values in the struct will be zero.

 

Finally, I had all sorts of issues, GetDownloadStatus is working as expected.

 

How to use GetDownloadStatus?

 

I use Unitask, but this should give you a general idea how to use it.
I also use an IProgress

IProgress<DownloadStatus> progress

that I pass in as a parameter, which is used in my UI to show players updated download status.

Code (CSharp):

1. float opPercentComplete = 0;
2. var opDependencies = Addressables.DownloadDependenciesAsync(key);
3.  
4. while (!opDependencies.IsDone)
5. {
6.   await UniTask.WaitForEndOfFrame();
7.   if (opDependencies.Status == AsyncOperationStatus.Failed)
8.   {
9.     Debug.LogException(opDependencies.OperationException);
10.     break;
11.   }
12.  
13.   if (!(opDependencies.PercentComplete > opPercentComplete)) continue;
14.   opPercentComplete = opDependencies.PercentComplete;
15.   progress.Report(opDependencies.GetDownloadStatus());
16. }
17.  

 

Also get this error.
PercentComplete returns values starting at 0.62 and increasing to 0.74, finally snapping to 1.

Interestingly, if I query the download size beforehand then the behavior changes.

Code (CSharp):

1. var getDownloadSizeHandle = Addressables.GetDownloadSizeAsync(assetKey);
2. yield return getDownloadSizeHandle;

After querying the download size, PercentComplete returns values beginning at 0.25 and ending at 0.51.
An improvement? :/

Using Unity 2018.4.29f1 with Addressables 1.16.15.

 

However, GetDownloadStatus() fixes the issue for me.

Code (CSharp):

1. var handle = Addressables.LoadAssetAsync<MyClassType>(assetKey);
2.  
3. // then I can use:
4. var status = handle.GetDownloadStatus();
5. float progress = status.Percent;

And it actually returns values between 0 and 1.

 

I'm still seeing the same issue with package 2019.4.18 and package 1.17.2 - Any updates on a fix?

 

also tried the GetDownloadStatus - same issue. I am loading the asset from the android /obb directory (not a server) and it takes 5 seconds to load, and is 0 for the 5 seconds, then jumps to 1 at the very end - I had gleaned the update loopp code from the spaceshooter example from github, and then also edited to use the GetDownLoadStatus - Any advice from Unity Foilks?

 

Same issue with 2020.2.7 and addressable 1.16.16 or 1.17.6-preview

 

Still not working with 1.17.13

 

This guy here show how to make accurate progress bar for donloading

. I tried and it worked like a charm

But still I don't know how make progress bar for cached scene when you load them to memory not download to disk. I try to make scene loading screen but everything in documentation is so confusing and there is no tutorial for such simple thing.


I tried

Code (CSharp):

1.  
2. void Start()
3.     {
4.         if (levelToLoad != "") {
5.             StartCoroutine(LoadAddresableScene());
6.         }
7.     }
8.  
9.     IEnumerator LoadAddresableScene()
10.     {
11.         yield return null;
12.         AsyncOperationHandle<SceneInstance> handle = Addressables.LoadSceneAsync(_scene, LoadSceneMode.Single, true);
13.      
14.         while (handle.Status != AsyncOperationStatus.Succeeded)
15.         {
16.             print("Loading progress: " + (handle.PercentComplete * 100) + "%");
17.             progressBarText.text = handle.PercentComplete * 100 +"%";
18.             progressBar.fillAmount = handle.PercentComplete;
19.             yield return null;
20.         }
21.     }
22.  

But scene is automatically loaded after a while without progress advance

 

If you just make the fix I suggest, the DownloadStatus work well

AssetBundleProvider.cs Line 178

Code (CSharp):

1.  
2. DownloadStatus GetDownloadStatus()
3. {
4.     if (m_Options == null)
5.         return default;
6.     var status = new DownloadStatus() { TotalBytes = m_BytesToDownload, IsDone = PercentComplete() >= 1f };
7.     if (m_BytesToDownload > 0)
8.     {
9.         if (m_WebRequestQueueOperation != null && string.IsNullOrEmpty(m_WebRequestQueueOperation.m_WebRequest.error))
10.             m_DownloadedBytes = (long)(m_WebRequestQueueOperation.m_WebRequest.downloadedBytes);
11.         else if (m_RequestOperation != null && string.IsNullOrEmpty((m_RequestOperation as UnityWebRequestAsyncOperation).webRequest.error))
12.             m_DownloadedBytes = (long)(m_RequestOperation as UnityWebRequestAsyncOperation).webRequest.downloadedBytes;
13.  
14.  
15.     }
16.  
17.     status.DownloadedBytes = m_DownloadedBytes;
18.     return status;
19. }

The addressable team recognize that they forgot to process the m_RequestOperation in the DownloadStatus...

 

Same for me.