How to use vtkImageReslice for vtkUnstructuredGrid

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#1

Dear VTK team,
I read the vtkUnstructuredGrid data from a file, and now I want to use vtkImageReslice to slice and extract it, but I did not find an example of how to use it. I hope Kind people can help me.

#2

vtImageReslice works on vtkImageData, but it does not work on vtkUnstructuredGrid data. You’ll want to use vtkCutter instead. See https://ajpmaclean.github.io/web-test/site/Cxx/VisualizationAlgorithms/CutStructuredGrid/ for an example. It shows cutting a structured grid, but it should work for your vtkUnstructuredGrid as well.

#3

Thank you for your answer.When I use vtkcutter, once I update him, he will have a segfault.Hope you can help me.

#4

Thank you for your answer.When I use vtkcutter, once I update him, he will have a segfault.Hope you can help me.thank you very much

#5

Sorry, but you have not provided nearly enough information to provide any help. Sharing your code would be very helpful.

#6

My code is as follows

vtkSmartPointer<vtkUnstructuredGrid> uids =input_data();

/*I set my own settings to read the vtkunstructedgrid function, which can be displayed normally through mapper */

   vtkSmartPointer<vtkPlane> plane = 
	vtkSmartPointer<vtkPlane>::New();
plane->SetOrigin(0,0,0);
plane->SetNormal(1,0,0);

vtkSmartPointer<vtkCutter> cutter = vtkSmartPointer<vtkCutter>::New();
  cutter->SetInputData(0,uids);
cutter->GenerateCutScalarsOff();
cutter->SetCutFunction(plane);
cutter->Update();//An error occurred when running to this point

vtkSmartPointer<vtkDataSetMapper>mappers=vtkSmartPointer<vtkDataSetMapper>::New();
mappers->SetInputData(uids);
mappers->AddClippingPlane(plane);

vtkSmartPointer<vtkActor> actor1 = vtkSmartPointer<vtkActor>::New();
	actor1->SetMapper(mappers);

vtkSmartPointer<vtkRenderer> ren = vtkSmartPointer<vtkRenderer>::New();
ren->AddActor(actor1);

vtkSmartPointer<vtkRenderWindow> renWin = vtkSmartPointer<vtkRenderWindow>::New();
renWin->AddRenderer(ren);

vtkSmartPointer<vtkRenderWindowInteractor> iren = vtkSmartPointer<vtkRenderWindowInteractor>::New();
	iren->SetRenderWindow(renWin);
renWin->Render();
	iren->Start();

I hope you can help me，Thank you very much.

#7

I don’t see anything obviously wrong in the code. Could you provide a stack trace where the program crashes?

#8

Thank you very much for your help. Now I have found out the reason is because of the problem of my data. At present, the modified data can realize the column. Thanks