// The directory for the asset must have already been created
IEnumerator <Null> PrecacheCoroutine(AssetGetter request)
{
string assetId = request.Asset.Id;
var cr = request.GetAssetCoroutine();
while (true)
{
try
{
bool result = cr.MoveNext();
if (!result)
{
break;
}
}
catch (VrAssetServiceException e)
{
ControllerConsoleScript.m_Instance.AddNewLine(e.Message);
Debug.LogException(e);
yield break;
}
yield return(cr.Current);
}
while (!request.IsReady)
{
yield return(null);
}
request.Asset.WriteToDisk();
string path = Path.Combine(GetCacheDirectoryForAsset(assetId), request.Asset.RootFilePath);
m_ModelsByAssetId[assetId] = new Model(Model.Location.PolyAsset(assetId, path));
}
/// Request loading a model with a given Poly Asset ID.
/// Pass the reason the Model is being pulled into memory, for logging purposes.
///
/// Upon completion, the asset will:
/// - be in "failed download" state (don't know how to check for this)
/// - be in "download succeeded, load failed" state (check Model.Error != null)
/// - be in "download succeeded, load succeeded" state (check Model.m_Valid)
///
/// The intent is that this method will ignore previous failures and try again.
/// If you don't want to retry a failed load-into-memory, you should check Model.Error first.
/// If you aren't trying to do a hot-reload, you should check Model.m_Valid first.
public void RequestModelLoad(string assetId, string reason) {
// Don't attempt to load models which are already loading.
if (IsLoading(assetId)) {
return;
}
if (m_ModelsByAssetId.ContainsKey(assetId)) {
// Already downloaded.
// It may be in memory already, but it's safe to ask for it to be brought in again.
// That way we get the behavior of "ignore a failed load-into-memory"
m_RequestLoadQueue.Add(new ModelLoadRequest(m_ModelsByAssetId[assetId], reason));
m_IsLoadingMemo.Add(assetId);
} else {
// Not downloaded yet.
// Kick off a download; when done the load will and arrange for the download-complete to kick off the
// load-into-memory work.
string assetDir = GetCacheDirectoryForAsset(assetId);
try {
// For the case that the folder exists, but the files were removed.
if (!Directory.Exists(assetDir)) {
Directory.CreateDirectory(assetDir);
}
} catch (UnauthorizedAccessException) {
Debug.LogError("Cannot create directory for online asset download.");
}
// Then request the asset from Poly.
AssetGetter request = VrAssetService.m_Instance.GetAsset(
assetId, VrAssetFormat.GLTF2, reason);
StartCoroutine(request.GetAssetCoroutine());
m_ActiveRequests.Add(request);
m_IsLoadingMemo.Add(assetId);
}
}
