[Paraview] Please help to understand the live mode of Catalyst

[Andy Bauer]

Hi,

The Catalyst live mode is still beta functionality. The client does connect
to the Catalyst enabled simulation directly. You have to keep in mind that
there's a pipeline on the server and a separate pipeline on the client.
Essentially the pipeline on the client uses the requested filter output
from the server and uses that as the source. The pipeline on the server
branches of the 'catalyst:' server (instead of the eyeball it will have a
circle with an intersecting triangle on the left). You can click on that
icon to download that data to your client. You should be able to add in
other filters on the Catalyst server by selecting the desired filter to
chain off of in the Pipeline Browser and then choosing the desired filter
in the menu.

If I remember correctly, the initial pipeline helps set up the environment
on the Catalyst server to work with. For big simulations, you wouldn't want
to download the full data set to the client anyway.

Regards,
Andy




On Mon, Oct 21, 2013 at 12:50 PM, Junyi Han <demonmerlin at gmail.com> wrote:

> Dear all,
>
> I'm new to Catalyst. I'm wondering how does the live mode work.
> In my understanding, the simulation is modified to call Catalyst library
> which can get pre-processed information from a python script file. The
> simulation also connects to paraview client directly. It means that there
> is no pvserver, instead, the simulation calls Catalyst library which based
> on paraview lib and VTK lib to process data like pvserver, is that correct?
> But in live mode, if I modify the paraview pipeline through the Paraview
> client, for example, add a filter, how to inform the simulation that the
> pipeline has been changed? If the simulation can be noticed of the modified
> pipeline, why do we need to create a python script to describe the pipeline
> at the beginning?
>
>
> Best wishes,
> Junyi Han
>
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