c++ - 如何在后台运行vtkRenderWindow而不向用户显示

我正在使用可以从dicom文件创建冠状，矢状和轴向图像的代码，但是与此同时，我不需要向用户显示renderWindow，这是我的代码:

int main(int argc, char* argv[])
{
   // Verify input arguments
   if ( argc != 2 )
   {
      std::cout << "Usage: " << argv[0]
      << " FolderName" << std::endl;
      return EXIT_FAILURE;
   }

   std::string folder = argv[1];
   //std::string folder = "C:\\VTK\\vtkdata-5.8.0\\Data\\DicomTestImages";

   // Read all the DICOM files in the specified directory.
   vtkSmartPointer<vtkDICOMImageReader> reader =
      vtkSmartPointer<vtkDICOMImageReader>::New();
   reader->SetDirectoryName(folder.c_str());
   reader->Update();

   // Visualize
   vtkSmartPointer<vtkImageViewer2> imageViewer =
      vtkSmartPointer<vtkImageViewer2>::New();
   imageViewer->SetInputConnection(reader->GetOutputPort());
imageViewer->SetSlice(0);
  imageViewer->Render();

for(int k = 0; k < 3; k++){

cout<< k << endl;

if(k == 0){
imageViewer->SetSliceOrientationToYZ();
}else if(k == 1){
imageViewer->SetSliceOrientationToXZ();
}else{
 imageViewer->SetSliceOrientationToXY();
}
    int _MinSlice = imageViewer->GetSliceMin();
        int _MaxSlice = imageViewer->GetSliceMax();

     // Screenshot
  vtkSmartPointer<vtkWindowToImageFilter> windowToImageFilter =
    vtkSmartPointer<vtkWindowToImageFilter>::New();

 vtkSmartPointer<vtkPNGWriter> writer =
    vtkSmartPointer<vtkPNGWriter>::New();
for (int i = _MinSlice; i < _MaxSlice; i++){
  vtkSmartPointer<vtkWindowToImageFilter> windowToImageFilter =
    vtkSmartPointer<vtkWindowToImageFilter>::New();

 vtkSmartPointer<vtkPNGWriter> writer =
    vtkSmartPointer<vtkPNGWriter>::New();

  windowToImageFilter->SetInput(imageViewer->GetRenderWindow());
  windowToImageFilter->ReadFrontBufferOff(); // read from the back buffer
  windowToImageFilter->Update();

  std::string filename = "img/" + std::to_string(k) + "/" + std::to_string(i) + ".png";
  char *y = new char[filename.length() + 1];
  std::strcpy(y, filename.c_str());

  writer->SetFileName(y);
  writer->SetInputConnection(windowToImageFilter->GetOutputPort());
  writer->Write();

  imageViewer->SetSlice(i);
  imageViewer->Render();
}
}

   return EXIT_SUCCESS;
}

我的问题是，当尝试imageViewer->SetRenderWindow(NULL);或imageViewer->GetRenderWindow()->Delete();时，它将删除renderWindow实例，并且代码将被破坏，因此如何在不向用户显示的情况下保持renderWindow在后台工作？

谢谢

最佳答案

您可以使用SetShowWindow(bool)或ShowWindowOff()，这些方法是从vtkWindow继承的。这样做不应停止渲染管道(您可能仍可以使用windowToImageFilter)，但是我没有对其进行测试。让我们知道它是否有效。