vtkSmartPointer<vtkVectorText> atext = vtkSmartPointer<vtkVectorText>::New();
    atext->SetText("注释");
 

    vtkSmartPointer<vtkPolyDataMapper> textMapper =
        vtkSmartPointer<vtkPolyDataMapper>::New();
    textMapper->SetInputConnection(atext->GetOutputPort());
  
    vtkSmartPointer<vtkFollower> textActor = vtkVectorActor vtkFollwer;
        vtkSmartPointer<vtkFollower>::New();
    textActor->SetMapper(textMapper);
    textActor->SetScale(0.2, 0.2, 0.2);
    textActor->AddPosition(0, 0.1, 0);
    textActor->GetProperty()->SetColor(0, 0, 1);