[vtkusers] volume rendering and animation

[Aashish Chaudhary]

Hi Kenji

On Mon, Dec 7, 2015 at 10:46 AM, Kenji Tsumura <
kenji.tsumura at neosoftmedical.com> wrote:

> Hello,
>
>
>
> I have 3D cardiac MRI data (4D including time domain). I can display
> volume rendering of the data using vtkSmartVolumeMapper.
>
> When I tried to do animation (CINE) by  changing actors every time
> TimerEvent occurs, it is slow (using CPU or GPU).
>
> Even when there is no user interaction, vtk seems to perform volume
> rendering every time actors change.
>

You mean when you go to the next time-step? (not sure what you are
referring to actor's change)


> Are there any way for vtk to not perform volume rendering every time
> actors change by caching or something?
>

If I understand your problem, no there is no direct way. If you have
multiple vtkVolume, and you are not going over the video memory limit,
atleast, data transfer shouldn't happen every time. Are you creating
vtkVolume for each timestamp or do you have only one that you are trying to
re-use?


> I was wondering if vtkMultiBlockDataSet or vtkTemporal*** can be utilized,
> but was unable to find a solution.
>
>
>
> Thank you,
>
>
>
> --
>
> Kenji Tsumura
>
>
>
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-- 



*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
*| http://www.kitware.com/company/team/chaudhary.html
<http://www.kitware.com/company/team/chaudhary.html>*
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