QT QVTKWidget与imageviewer2，使用自定义交互函数

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https://blog.youkuaiyun.com/colddie/article/details/8966521

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 reader = vtkSmartPointer<vtkDICOMImageReader>::New();
    reader->SetDirectoryName("/Users/mac/Desktop/CT数据/tsing" );// path.toUtf8().constData()
    reader->Update();
    
    int dims[3];double spacing[3];double origin[3];
    reader->GetOutput()->GetDimensions(dims);
    reader->GetOutput()->GetSpacing(spacing);
    reader->GetOutput()->GetOrigin(origin);
    std::cout << "dims:" << dims[0] << ", " << dims[1] << ", " << dims[2] << std::endl;
    std::cout << "spacing:" << spacing[0] << ", " << spacing[1] << ", " << spacing[2] << std::endl;
    std::cout << "origin:" << origin[0] << ", " << origin[1] << ", " << origin[2] << std::endl;

    viewer =vtkSmartPointer<vtkImageViewer2>::New();
    viewer->SetInputData(reader->GetOutput());
    viewer->SetSliceOrientationToXY();
    viewer->GetRenderer()->SetBackground(1,1,1);
    
  
    vtkSmartPointer<MyInteractor> style = vtkSmartPointer<MyInteractor>::New();
    
  
    ui->qvtkWidgetLeft->setVisible(true);
  
     ui->qvtkWidgetLeft->SetRenderWindow(viewer->GetRenderWindow());
    viewer->SetupInteractor(ui->qvtkWidgetLeft->GetRenderWindow()->GetInteractor());//交互方式
    ui->qvtkWidgetLeft->GetInteractor()->SetInteractorStyle(style);
    viewer->GetRenderer()->ResetCamera();
    ui->qvtkWidgetLeft->GetRenderWindow()->Render();//绘制