[vtk-developers] Volume rendering update

[David Gobbi]

I was playing with the Medical4 example last week, and
vtkGPURayCastVolumeMapper managed to render shaded volumes at up to
1024x1024x768!  Very fast loading, too, it took around 1 second to load.

With the volume size at 1024x1024x1024, however, there was a wrap-around
artifact.  I'm guessing that it was due either to memory limitations, or
due to integer overflow.  Maybe a hardware issue, maybe the driver, hard to
say when the data set itself is 2GB.  This is a Mac (10.9.5) with AMD
FirePro D700 6GB, what datatypes does the mapper use for the buffers?

On Tue, Feb 23, 2016 at 9:43 AM, Aashish Chaudhary <
aashish.chaudhary at kitware.com> wrote:

> Hi all,
>
> We have made some significant improvements to volume rendering since our
> last update (Ref:
> https://blog.kitware.com/volume-rendering-enhancements-in-vtk/,
> https://blog.kitware.com/volume-rendering-on-ios-and-android/). Below is
> a list of tasks that are either nearly completed and or are in VTK master
> as of today.
>
>
>    -
>
>    Features/updates
>    -
>
>       Big volume support - Fixing failing tests. The idea is to split
>       volume into smaller volumes and render them piecewise.
>       -
>
>       3x-5x clipping plane performance - For the same parameters,
>       clipping is much faster now, the trick is to skip voxels that are clipped
>       by planes.
>       -
>
>       Depth and color data capture - User can use RenderToImage to render
>       to a FBO and get depth and color texture which then could be utilized for
>       other operations.
>       -
>
>    Bugs
>    -
>
>       Fixed gradient opacity not working for more than one components
>       -
>
>       Fixed clipping plane location is wrong in certain cases.
>       -
>
>       Fixed volume rendering invalid or bad for cell data
>       -
>
>       Fixed edges issue when rendering in multiple pieces (hard edges)
>       -
>
>       Fixed volume rendering not working in remote rendering mode with
>       image reduction factor > 1
>       -
>
>       Fixed volume rendering not working in client-server mode
>       -
>
>       Fixed volume disappears when changing parameters
>       -
>
>       Fixed volume rendering not using the correct sampling distance
>
>
> --
>
>
>
> *| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
> *| http://www.kitware.com/company/team/chaudhary.html
> <http://www.kitware.com/company/team/chaudhary.html>*
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtk-developers/attachments/20160223/131add46/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 1024x1024x1024.png
Type: image/png
Size: 266561 bytes
Desc: not available
URL: <http://public.kitware.com/pipermail/vtk-developers/attachments/20160223/131add46/attachment-0001.png>