Method WriteData

IO/Export/vtkJSONRenderWindowExporter.cxx:108–187

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

//------------------------------------------------------------------------------
void vtkJSONRenderWindowExporter::WriteData()
{
  if (this->GetSerializer() == nullptr)
  {
    vtkErrorMacro(<< "No scene!");
    return;
  }
  this->GetSerializer()->Reset();

  if (this->GetArchiver() == nullptr)
  {
    vtkErrorMacro(<< "No archiver!");
    return;
  }

  if (this->GetArchiver()->GetArchiveName() == nullptr)
  {
    vtkErrorMacro(<< "Please specify Archive Name to use");
    return;
  }

  // Populate the scene instance
  {
    // Construct a top-level node for the render window
    vtkViewNode* vn = this->Factory->CreateNode(this->RenderWindow);

    // Build the scene graph
    vn->Traverse(vtkViewNode::build);

    // Construct the vtk-js representation of the scene graph
    vn->Traverse(vtkViewNode::synchronize);

    // Update the datasets associated with the scene graph
    vn->Traverse(vtkViewNode::render);

    // Delete the top level node
    vn->Delete();
  }

  // Open the archive for writing
  this->GetArchiver()->OpenArchive();

  // Write the top-level index file describing the scene elements and their
  // topology.
  {
    std::stringstream stream;
    Json::StreamWriterBuilder builder;
    builder["commentStyle"] = "None";
    builder["indentation"] = this->CompactOutput ? "" : "  ";
    std::unique_ptr<Json::StreamWriter> writer(builder.newStreamWriter());
    writer->write(this->GetSerializer()->GetRoot(), &stream);

    std::string index = stream.str();
    this->GetArchiver()->InsertIntoArchive("index.json", index.c_str(), index.size());
  }

  // Write the associated data arrays into the archive
  {