Hi Manju, Dirk,
> > > 2. Is there anyway I can split a volume data object into many parts ?
> > > I have some volume datasets I want to render using a cluster, if there
> > > are any applications that can do this manually, I would like to know.
> > > If not I would like to know if I can do this in the code using volren.
> >
> > The VolRen code can internally split the volume into multiple parts
> > (Bricks) automatically. However, this is currently totally separate from
> > the clustering, and generally all bricks are rendered for every frame.
> > Unless Manfred has extended it and I don't know about it. ;)
> >
> > I was planning to look into doing volume splitting for clusters this
> > semester anyway. What's your time frame for this?
That's an interesting problem. Maybe the best way to do this is to
expose Brick as a OSGDrawable. So make it a smaller version of the
DVRVolume and to built a small drawtree of these bricks for the volume.
For the application programmer this could be transparent, since the
DVRVolume could create this drawtree automatically. But with the
right interfaces the user would also be able to specify it according
to his needs. I see a good chance that the functionality of DVRVolume
could be pushed down to the Brick without sacrificing any feature.
A workaround which should work right now is to decompose the 3D data
yourself and to build different volume nodes from this image.
(osg::Image) has already some routines for doing that. Adjusting the
different Volume nodes correctly should give seamless images in the
output, for the sort last rendering should do a correct depth sorting
based on the bounding boxes. Maybe there is some issue with the
slicing planes which should be aligned in different volumes but
this should be easy to fix. In order to make this work the sort last
rendering would have to perform alpha compositing, which I am currently
not sure, whether this is also implemented.
Hope this helps.
Manfred.
======================================================================
Manfred Weiler [EMAIL PROTECTED]
Visualisierung und Interaktive Systeme Telefon: 0711/7816-208
Universitaet Stuttgart, IfI FAX: 0711/7816-340
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