[vtkusers] SetCutPlane not working in vtkImageResliceMapper

[Debjit Ghosh]

Thank you very much. You are right!



So I turned SliceFacesCamera Off and it SetSlicePlane with a vtkPlane object. Now, though the corresponding slice has been extracted, there are two issues that I face, that I would appreciate your advice on, immensely.



- The image is getting visualized as a plane slanted in 3D space which I had to move with Shift + LeftMousePressed to align - How do I slap it onto the screen so it is straight?

- I was updating the normal in a Timer and incrementing it to test whether I can do this dynamically and it took effect only the first time



Perhaps it's due to my lack of experience in 3D slicing but these are the updates that I have tried calling:



               TimerEvent()

               {

                                             vtkSmartPointer<vtkPlane> slicePlane = vtkSmartPointer<vtkPlane>::New();

                                             slicePlane = resliceMapper->GetSlicePlane();

                                             slicePlane->Print(std::cout);

                                             x+=0.01; y +=0.01; z+=0.01;

                                             slicePlane->SetNormal(x, y, z);

                                             slicePlane->SetOrigin(103.5, 111.5, 175.5);

                                             resliceMapper->SetSlicePlane(slicePlane);



                                             resliceMapper->Modified();

                                             imageSlice->Render(renderer);



                                             renderer->ResetCamera();

                                             interactor->Modified();

                                             interactor->Render();

               }



Basically, I have tried all the possible updates that I could :| But in vain. Could you please advise which update needs to be called?



Thank you!


From: David Gobbi [via VTK] [mailto:ml-node+s1045678n5716628h22 at n5.nabble.com]
Sent: Friday, October 12, 2012 5:23 PM
To: Ghosh, Debjit
Subject: Re: SetCutPlane not working in vtkImageResliceMapper

Hi Debjit,

You probably have SliceFacesCamera turned on for the mapper.  This
will override any plane that you set manually.

If you are using SliceFacesCamera and SliceAtFocalPoint, then the way
to change the slice is by changing the camera's position and focal
point.

 - David


On Fri, Oct 12, 2012 at 6:01 PM, Debjit Ghosh <[hidden email]</user/SendEmail.jtp?type=node&node=5716628&i=0>> wrote:
> I have been facing an issue where I called the SetSlicePlane(vtkPlane*) with
> a normal and/or an origin but the visualization didn't change. I had called
> the interactor->Render(), called the Modified() on the ImageResliceMapper
> but neither made the difference.
>
> It would be great if someone could tell me what I am missing here.
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