[Paraview] [EXTERNAL] Idiot's Guide to Programmable Filter

[Berk Geveci]

Hey Dennis,

Which version of ParaView are you using? We have made some significant
improvements to the way we handle multi-block datasets (which Exodus
produces) in the latest version.

The interface in the Programmable Filter is somewhat different than what
you would have in a ParaView Python script. This is because you actually
have access to the full data and the objects in there are of different
types.

If you give me some examples of what you are trying to do in the
programmable filter, I can provide code that demonstrates the use of the
API in the programmable filter.

Best,
-berk

On Tue, Apr 28, 2015 at 10:32 PM, Scott, W Alan <wascott at sandia.gov> wrote:

>  Dennis,
>
> The Python/ Programmable filter is a black box to me (i.e., I won’t be
> much additional help).  However, the place i would start would be the new,
> super-duper ParaView Guide.  Kitware – and especially Utkarsh – have done a
> great job on it.
>
>
>
> Rather than giving the link, here is how to find it.  It is sold in paper
> form on Amazon, and also is available as a .pdf for free (lacking 3
> chapters, not related to the python filter).
>
>
>
> paraview.org/ Resources/ ParaView Guide.  This includes the link to the
> .pdf.  You are interested in (at least) chapter 13.  It is listed under
> master section II, Reference Manual.
>
>
>
>
>
> Alan
>
>
>
> *From:* ParaView [mailto:paraview-bounces at paraview.org] *On Behalf Of *Dennis
> Conklin
> *Sent:* Tuesday, April 28, 2015 11:11 AM
> *To:* paraview at paraview.org
> *Subject:* [EXTERNAL] [Paraview] Idiot's Guide to Programmable Filter
>
>
>
> All,
>
>
>
> I’m a little confused by what objects are inside a programmable filter.
> I have a multi-block EXODUS dataset.    When I read this in it is a
> Exodus2Reader object (sp?) and I can access the blocks, pointdata,
> celldata, etc in a python script.
>
>
>
> Once I get inside the Programmable filter, the  blocks of the input[] seem
> to have different member functions than they did in a Python script.   So I
> can’t figure out  how to get connectivity,   number of cells in a block,
> generate new cell variables, etc.
>
>
>
> So, if I’m in a Programmable Filter, what object do I look at in either
> the Paraview or VTK class libraries to understand what the properties of
> the block are?
>
>
>
> Thanks very much for any insight you can give.
>
>
>
> Dennis
>
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