[Paraview] ParaView python vs VTK python api (UNCLASSIFIED)

[Sebastien Jourdain]

Hi Simon,

Catalyst is a bit different as well. And Andy could provide more info on
that.

So the answer will greatly depend on which section of the code you are
trying to work on.
- adapter that fill the trivial producer for catalyst
- processing pipeline inside catalyst
- ParaView post-processing for live in-situ visualization

Seb



On Wed, Aug 6, 2014 at 2:03 PM, Su, Simon M CTR USARMY ARL (US) <
simon.m.su.ctr at mail.mil> wrote:

> Classification: UNCLASSIFIED
> Caveats: NONE
>
> Hi Andy,
>
> Thanks... I will dig into it...
>
> Thanks
> -simon
>
> -----Original Message-----
> From: Andy Bauer [mailto:andy.bauer at kitware.com]
> Sent: Wednesday, August 06, 2014 3:54 PM
> To: Su, Simon M CTR USARMY ARL (US)
> Cc: paraview at paraview.org
> Subject: Re: [Paraview] ParaView python vs VTK python api (UNCLASSIFIED)
>
> Hi Simon,
>
>
> There is more information at
> http://www.paraview.org/Wiki/Python_Programmable_Filter. The ParaView
> Python
> API is meant for the client side of ParaView while the VTK Python API is
> meant
> for the server side. You can mix and match a bit by using Fetch() (see
> http://www.paraview.org/Wiki/ParaView/Python_Scripting for more details)
> where
> you start on the client with the ParaView Python API and then "fetch" the
> output from a filter to the client to be able to do VTK Python API stuff on
> VTK objects. For big jobs in parallel though this fetch operation can
> overwhelm the client with memory use.
>
>
> Regards,
> Andy
>
>
>
> On Wed, Aug 6, 2014 at 3:46 PM, Su, Simon M CTR USARMY ARL (US)
> <simon.m.su.ctr at mail.mil> wrote:
>
>
>         Classification: UNCLASSIFIED
>         Caveats: NONE
>
>         Hi Andy,
>
>         I think the filter option may not be viable as the VTK code is the
> part that
>         creates the VTK data structure (points - vtk.vtkPoints(),
> triangles -
>         vtk.vtkCellArray, polydata - vtk.vtkPolydata()) using VTK python
> api.
>
>         This is actually related to the catalyst question I asked. Luckily
> the user's
>         code is in python already and Sean Ziegeler mentioned to bypass
> catalyst and
>         just call ParaView using PV Python api (and run the simulation
> code python
>         script using pvbath/pvpython). But the user's code is in VTK
> python and not
>         ParaView python which caused some issue here.
>
>         In that regards, are there documentation that I can look up on the
> comparable
>         Python API between VTK and ParaView?
>
>         Thanks
>         -simon
>
>
>         -----Original Message-----
>         From: Andy Bauer [mailto:andy.bauer at kitware.com]
>         Sent: Wednesday, August 06, 2014 3:35 PM
>         To: Su, Simon M CTR USARMY ARL (US)
>         Cc: paraview at paraview.org
>         Subject: Re: [Paraview] ParaView python vs VTK python api
> (UNCLASSIFIED)
>
>         It may not be possible to do what you want explicitly. ParaView
> can be viewed
>         in some ways a wrapper around VTK filters. You can try the
> programmable
> filter
>         which uses the VTK Python API but is still intended to operate
> like a filter
>         (i.e. not modifying the input data sets, etc.).
>
>
>         Andy
>
>
>
>         On Wed, Aug 6, 2014 at 3:28 PM, Su, Simon M CTR USARMY ARL (US)
>         <simon.m.su.ctr at mail.mil> wrote:
>
>
>                 Classification: UNCLASSIFIED
>                 Caveats: NONE
>
>                 Hello,
>
>                 I would like to run some of my VTK python code under
> ParaView
> (pvbatch or
>                 pvpython). Where can I find documentation on porting VTK
> python code
> to use
>                 ParaView python api? I need to create some VTK object in
> ParaView. Is
> there
>                 a shortcut to this (like being able to use VTK python api
> within
> ParaView
>                 Python environment)?  Or am I not making sense / asking
> the wrong
> question.
>
>                 Any help is much appreciated.
>
>                 Thanks
>                 -simon
>
>                 Classification: UNCLASSIFIED
>                 Caveats: NONE
>
>
>
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>
>
>
>
>         Classification: UNCLASSIFIED
>         Caveats: NONE
>
>
>
>
>
>
> Classification: UNCLASSIFIED
> Caveats: NONE
>
>
>
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