[Paraview] Intra-zonal surfaces

[Moreland, Kenneth]

John,

I am afraid that there is no good way to do what you want right now.
There is no filter that is able to directly determine which external
faces of each block are actually abutting or are inside another block.
You could use tools like D3 or Clean to Grid, but as you suspect you
first have to cram everything in a single unstructured grid.  Right now
there is no filter to do that either.  Writing one would be trivial, and
there has been talk on this list for doing it.  I think no one has done
it because it is generally best to avoid doing so whenever possible.

Does your CFD dataset happen to look like a brick?  If so, you can fake
the operation with 6 slice filters on the boundaries of the data.

-Ken

> -----Original Message-----
> From: paraview-bounces+kmorel=sandia.gov at paraview.org
[mailto:paraview-
> bounces+kmorel=sandia.gov at paraview.org] On Behalf Of John Biddiscombe
> Sent: Friday, January 11, 2008 7:10 AM
> To: paraview at paraview.org
> Subject: [Paraview] Intra-zonal surfaces
> 
> When I load a complex CFD dataset with several dozen zones, I create a
> multiblock data structure which has one dataset per zone/volume.
> 
> When visualizing this as a surface only and with transparency turned
on.
> The faces between zones are visible as artifacts inside the volume
where
> the zones abut. I was wondering if back face culling would remove
these,
> but of course, there are font faces there too.
> 
> Is there any way of coaxing d3 or similar filter to generate ghost
cells
> that can be used to overcome these artifacts.
> or
> I am thinking that if I join all cells into a single unstructured grid
> (in parallel if necessary) then these surface cells will disappear
(but
> perhaps there is a solution I have missed). Is there a filter to
append
> all the zones into one already present in ParaView - like AppendFilter
> for a multiblock->single unstructured grid.
> 
> Thanks
> 
> JB
> 
> --
> John Biddiscombe,                            email:biddisco @ cscs.ch
> http://www.cscs.ch/about/BJohn.php
> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
> Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82
> 
> 
> _______________________________________________
> ParaView mailing list
> ParaView at paraview.org
> http://www.paraview.org/mailman/listinfo/paraview