Berk,
Thanks for your reply.
I am using Paraview 4.3, so hopefully that has the improvements you mentioned.
I guess if I could figure out what objects are used for Blocks in side the
Programmable filter I could do more on my own, but it’s clear they are
different from in a python script, but still not clear what they are.
So a typical application would be a special version of point data to cell data.
I have some node variables. I want to find all the nodes attached to each
element, do some calculations on those node variables to generate a new element
variable. So basically like
Loop over blocks
Loop over elements in block
Find all nodes connected to element
Perform calculations based on node variables
Assign new element variable(s) based on calculations
Thanks for any insight – Alan at Sandia has suggested I check the latest user
guide, and I will, but I haven’t seen a good element example for the
Programmable filter yet – I don’t have any problem doing nodal manipulations,
but I have a good example of that.
Dennis
From: Berk Geveci [mailto:[email protected]]
Sent: Wednesday, April 29, 2015 10:29 AM
To: Scott, W Alan
Cc: Dennis Conklin; [email protected]
Subject: Re: [Paraview] [EXTERNAL] Idiot's Guide to Programmable Filter
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
<[email protected]<mailto:[email protected]>> 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/<http://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:[email protected]<mailto:[email protected]>] On
Behalf Of Dennis Conklin
Sent: Tuesday, April 28, 2015 11:11 AM
To: [email protected]<mailto:[email protected]>
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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