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

[Su, Simon M CTR USARMY ARL (US)]

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
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Classification: UNCLASSIFIED
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