[Paraview] Face Data on vtkUnstructuredGrids

[George Zagaris]

Hi Andy,

Given your unstructured volume mesh, M, one way to achieve what you
describe is the following:

(1) Construct a vtkUnstructureGrid instance, F(M), consisting of the
faces of M, i.e., each cell in F(M) is a facet in M.
(2) Build auxiliary arrays for each cell in F(M) to store which cells
in M the face is adjacent to.

I think you can do this in one loop and it should be sufficient for
the operations you want to perform, e.g., interpolate to the face etc.

Let me know if you need more help to get started on this.

Best,
George


> Message: 2
> Date: Mon, 31 Oct 2011 11:32:09 -0000
> From: "Parker, Andrew (UK Filton)" <Andrew.Parker2 at baesystems.com>
> Subject: Re: [Paraview] Face Data on vtkUnstructuredGrids
> To: <paraview at paraview.org>
> Message-ID:
>        <FC17C27D1141BF4C945453BACB1CB1D10F7DC5 at GLKMS2100.GREENLNK.NET>
> Content-Type: text/plain; charset="utf-8"
>
> Hi,
>
>
>
> I have to be honest so far there has been no solution/suggestions to the problem I posed.  I am particularly interested in the access pattern I described, but also the ability to be able to add a scale to faces of a 3d unstructured mesh, which I can then cut.
>
>
>
> Any help would be great, I should imagine this is of interest to a lot of people.
>
>
>
> Andy
>
>
>
> From: p.p pyloth [mailto:lalujesus at yahoo.co.in]
> Sent: 29 October 2011 12:16
> To: Parker, Andrew (UK Filton)
> Subject: Re: [Paraview] Face Data on vtkUnstructuredGrids
>
>
>
>                    *** WARNING ***
>
>  This message has originated outside your organisation,
>  either from an external partner or the Global Internet.
>      Keep this in mind if you answer this message.
>
> I have the same problem
> I dont know how to export data on surfaces like wall faces through vtk , as vtk is a bulk reader
>
> Suppose I want to show data on wall zones,inlet zones,outlet ,  no idea how to show that.
> IF you solved ur problem please post the solution
>
>
>
> --- On Fri, 28/10/11, Parker, Andrew (UK Filton) <Andrew.Parker2 at baesystems.com> wrote:
>
>
> From: Parker, Andrew (UK Filton) <Andrew.Parker2 at baesystems.com>
> Subject: [Paraview] Face Data on vtkUnstructuredGrids
> To: paraview at paraview.org
> Date: Friday, 28 October, 2011, 6:31 PM
>
> Hi,
>
>
>
> I already have an established reader that reads in our bespoke format and converts it to a vtkUnstructuredGrids so that I can view it in Paraview. Furthermore a filter then reads in a solution file in a bespoke format and shows the cell data from the CFD solution. This works great, happy days.  However, I now need to show data on the faces on the vtkUnstructuredGrid, a metric.  I have two problems, no idea how to set this given the above setup, and two, to compute the metric I could do with the following type of access:
>
>
>
> Loop over all faces of vtkUnstructuredGrid
>
>
>
>                Get the face centre
>
>                Get the Left cell centre
>
>                Get the Right cell centre
>
>
>
>                Do some stuff?..
>
>
>
>                Set a scale on the face to be a number based on the stuff
>
>
>
> Finish
>
>
>
> I have no idea how to access the vtkUnstructuredGrid in the above to pattern???
>
>
> Can anybody help, it would be very useful? examples more than welcome.
>
>
> Cheers,
>
> Andy
>
>
> ********************************************************************
> This email and any attachments are confidential to the intended
> recipient and may also be privileged. If you are not the intended
> recipient please delete it from your system and notify the sender.
> You should not copy it or use it for any purpose nor disclose or
> distribute its contents to any other person.
> ********************************************************************
>
>
> -----Inline Attachment Follows-----
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>
>
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <http://www.paraview.org/pipermail/paraview/attachments/20111031/13f5e4ef/attachment.htm>
>
> ------------------------------
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>
>
> End of ParaView Digest, Vol 90, Issue 80
> ****************************************
>