[vtkusers] vtk JS - Slice Scrolling with vtkInteractorStyleImage

[Sebastien Jourdain]

Hi Logan,

I think the zooming action is going through the slices.
Ctrl + drag seems to do the trick for me.

If you want, you can report an issue on the project itself.
https://github.com/kitware/vtk-js/issues

Thanks,

Seb

On Fri, Jun 16, 2017 at 12:11 PM, Logan Langholz <llangholz89 at gmail.com>
wrote:

> Hello,
>
> I’ve been playing around with the vtk.js library and am currently stuck
> when trying to scroll through slices of a volume using the
> vtkInteractorStyleImage class. Using the examples as a guide and the
> ‘LIDC2.vti’ example volume, I can get various slices to show up on loading
> with ‘mapper.setZSclice()’, but am then unable to scroll through.  Here’s
> that bit of the code:
>
>         const mapper = vtkImageMapper.newInstance();
>         mapper.setInputData(data);
>         mapper.setZSlice(50);
>
>         const iStyle = vtkInteractorStyleImage.newInstance();
>         iStyle.setInteractionMode(‘IMAGE_SLICING’);
>         renderWindow.getInteractor().setInteractorStyle(iStyle);
>
> Looking at the source code, clicking while holding ‘control’ should allow
> me to scroll through, but I’m not getting that event.  If I switch the
> interaction mode to ‘IMAGE3D’ and hold shift, I can get the expected
> rotation event.
>
> I’m not sure if it’s just something simple that I’m overlooking in the
> setup (which is likely given that I’m still relatively new to this), but I
> appreciate any help and pointers!
>
> Cheers,
>
> -Logan
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