Method RequestInformation

IO/Geometry/vtkGLTFReader.cxx:671–826

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
int vtkGLTFReader::RequestInformation(
  vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  if (!this->Superclass::RequestInformation(request, inputVector, outputVector))
  {
    return 0;
  }

  // Read file metadata
  // Make sure we have a file to read

  if (this->Stream)
  {
    // Check for stream change in case the loader was already created
    if (this->Loader != nullptr && this->Loader->GetInternalModel() &&
      (this->Loader->GetInternalModel()->Stream != this->Stream ||
        this->Stream->GetMTime() != this->LastStreamTimeStamp))
    {
      this->IsMetaDataLoaded = false;
      this->IsModelLoaded = false;
      this->Textures.clear();
    }

    this->InitializeLoader();
    if (!this->Loader->LoadModelMetaDataFromStream(this->Stream, this->URILoader))
    {
      vtkErrorMacro("Error loading model metadata from stream");
      return 0;
    }

    this->LastStreamTimeStamp = this->Stream->GetMTime();

    vtkNew<vtkEventForwarderCommand> forwarder;
    forwarder->SetTarget(this);
    this->Loader->AddObserver(vtkCommand::ProgressEvent, forwarder);

    this->CreateAnimationSelection();
    this->CreateSceneNamesArray();
    this->SetCurrentScene(this->Loader->GetInternalModel()->DefaultScene);
    this->IsMetaDataLoaded = true;
  }
  else if (this->FileName)
  {
    std::string fileNameAsString(this->FileName);

    if (fileNameAsString.find('\\') != std::string::npos)
    {
      vtksys::SystemTools::ConvertToUnixSlashes(fileNameAsString);
    }

    if (!vtksys::SystemTools::FileIsFullPath(fileNameAsString))
    {
      fileNameAsString = vtksys::SystemTools::CollapseFullPath(fileNameAsString);
    }

    if (this->FileName != fileNameAsString)
    {
      this->SetFileName(fileNameAsString.c_str());