[vtkusers] Volume Rendering Issues - External Module

[Aashish Chaudhary]

Hi,

Thanks for reporting it. Few questions:

VTK version?

Platform (Windows/Linux)

Via SmartVolumeMapper you are getting GPU or FixPoint?

Also, OpenGL2 backend or older?

It looks like some matrices are incorrect. Can you print them in VTK and
ensure they are looking reasonable?

Thanks,


On Thu, Jun 22, 2017 at 12:57 PM Teek <EZ7543 at wayne.edu> wrote:

> Hi,
>
> So I've been using the external module to rendering cubes and spheres
> successfully.
> However, I'm trying to incorporate medical volume rendering from DICOM
> files.
> I have done so successfully in a normal VTK renderer and render window and
> also a QVTKWidget.
>
> Basically:
> DICOM Image Reader > SmartVolumeMapper > Volume (Volume Property, Opacity
> and Color Transfer Functions) > Render
>
> When I use the same flow on the ExternalWidget however I get some weird
> results:
> <http://vtk.1045678.n5.nabble.com/file/n5743719/Normal.png>
> <http://vtk.1045678.n5.nabble.com/file/n5743719/Distortion.png>
>
> Essentially it looks like the volume is actually a texture mapped onto a
> cube? And as I rotate, I can see the volume continuously deform to fit a
> "cube shape".
> Any idea why this could be? I thought maybe it was due to the opacity
> transfer function, because if I disable that, I get the rendering fine. The
> only issue is that without the opacity function, what I have is essentially
> a cube anyway, so I can't really tell any difference.
>
> -Teek
>
>
>
> --
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