Non-blocking Callback

RvBGames · ‎08-19-2022

I haven't figured out how to make this work. The callback is set to a user-defined function:

importerContext.itsFbxImporter->SetProgressCallback(pFbxCallback, this);

The import is started in non-blocking mode:

importerContext.itsFbxImporter->Import(pFbxScene, bNonBlocking)

My callback is called repeatedly and reaches 100%:

bool ImportCallback(void* pArgs, float percentage, const char* pStatus)
{
    FbxSceneImporter* pThis = reinterpret_cast<FbxSceneImporter*>(pArgs);
    if (pThis == nullptr) return false;

    if (!pThis->GetIsNonBlocking())
        return true;

    FbxImporter* pImporter = pThis->GetImporterContext().itsFbxImporter;

    if (pImporter == nullptr)
    {
        pThis->SetThreadState(FileIOCommon::ThreadState::ImportFailed);
        return false;
    }

    bool bImportStatus = false;
    bool bImporting = pImporter->IsImporting(bImportStatus);

    //if (!bImporting || percentage >= 100.0)
    if (bImportStatus)
    {
        fbxsdk::FbxStatus fbxStatus = pImporter->GetStatus();

        string errorString = fbxStatus.GetErrorString();
        pThis->GetErrorList().push_back(errorString);

        if (fbxStatus != FbxStatus::eSuccess)
        {
            pThis->SetThreadState(FileIOCommon::ThreadState::ImportFailed);
            return false;
        }
        pThis->SetThreadState(FileIOCommon::ThreadState::ImportComplete);
    }

    return true;
}

bImportStatus is never true. Percentage does reach 100% and I can check the status thereafter. But when I return from my function an exception is thrown.

Access violation (0c00..5) in FbxGlobalLightSettings::RestoreDefaultSettings()
Apparently code is accessing a nullptr

I can import without any problems using blocking. Non-blocking is causing me a problem.

Btw, do you have an example that shows how to use FbxProgress? I really didn't find much information on it.

Thank you in advance for your help.