vtk中垂直翻轉圖像的方法

    vtkCamera *camera = getActiveCamera();
    setFlip(true);
    if(m_isImageFlipped)camera->SetRoll(180);
    else camera->SetRoll(0);
    camera->Azimuth(180);
    getRenderer()->ResetCameraClippingRange();
    setFlip(false);
    m_isImageFlipped = !m_isImageFlipped;
    emit cameraChanged();
    m_annotationsHandler->updateAnnotations();
    render();