[vtkusers] Multiple Volumes

[Lisa Avila]

Hello Hxsham,

Overlapping volumes are not supported - the volume mappers render 
independently and there is no way to handle such overlapping volumes 
without combining the data. If you can resample one volume into the other 
(creating a two component volume) then you can use the 
vtkFixedPointVolumeRayCastMapper to render the combined data.

Lisa


At 02:23 PM 6/14/2005, Hxsham Fire wrote:
>Thanks Lisa,
>I have tried the vtkFrustumCoverageCuller... However
>that does not entirely solve my problem...
>I have two structures each found in a separate volume.
>The volumes overlap exactly, that is they represent
>the same volume in space.
>The two structures are interleaved. That is part of
>the first structure is behind the second structure,
>and another part of the first structure is in front of
>the second structure.
>The vtkFrustumCoverageCuller seems to display, either
>the first structure all in front of the second
>structure, or the inverse.
>Is there a way that these structures can be displayed
>properly?
>Thanks,
>Hxsham
>
>--- Lisa Avila <lisa.avila at kitware.com> wrote:
>
> > Hell Hxsham,
> >
> > You need to get the vtkCuller from the vtkRenderer
> > (should be a
> > vtkFrustumCoverageCuller) and tell it to sort the
> > props in a back to front
> > order.
> >
> > Lisa
> >
> >
> > At 05:17 PM 6/13/2005, Hxsham Fire wrote:
> > >Hi,
> > >
> > >I am trying to render two vtkVolumes that overlap.
> > >The problem I am facing is that one of the two
> > volumes
> > >is coming out as dominant, and even when it is more
> > >distant to the second volume, it is still
> > projecting
> > >to the screen instead of the other volume.  In
> > other
> > >words, for some reason the z-buffering between
> > these
> > >two volumes is not working and the volume rendered
> > >second is getting displayed dominantly over the
> > first
> > >volume.  Can anybody help me with this problem???
> > >
> > >Thank you
> > >Hxsham
> > >
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