[vtk-developers] Some vtkMultiVolume questions/issues

[Elvis Stansvik]

2018-05-08 6:54 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
> 2018-05-02 8:38 GMT+02:00 Elvis Stansvik <elvis.stansvik at orexplore.com>:
>> Hi all,
>>
>> I'm trying out the (very cool) vtkMultiVolume in VTK master.
>>
>> Performance is noticeably slower if I render two volumes added to a
>> vtkMultiVolume, than if I render the same as separate volumes in the
>> "traditional" way. Is this to be expected? (note that in this
>> particular test, my two volumes were not intersecting, so the visual
>> result in the two scenarios was exactly the same).
>>
>> I'll need to investigate more, but it seems that I can't set the
>> position of the first volume (the one set to port 0) using
>> SetPosition(..), it has no effect. Setting the position of subsequent
>> volumes (at higher port numbers) seems to work. I believe this was
>> possibly reported by another user on the users list.
>>
>> Again I need to investigate more, but it seems
>> vtkRenderer::ResetCamera() did not quite work correctly when I had a
>> single vtkMultiVolume with a couple of volumes hooked up. It did not
>> center correctly on the two volumes.
>>
>> Just wanted to ask if these were known issues, or if I should report
>> them? If I should report them I'll try to make minimal test cases.
>
> Noone knows? Alvaro, did you run into any issues like this while
> developing the vtkMultiVolume support?

I got a bounce when I Cc:ed Alvaro, and looking at his GitLab activity
I suspect he has left VTK?

Anyone picking up vtkMultiVolume? I think it's a great addition so
would be a pity if it's left to bitrot.

Elvis

>
> Elvis
>
>>
>> Cheers,
>> Elvis