[Paraview] Compute gradients

[Adriano Gagliardi]

Thanks! My mistake was in this line:
 
g.SetInputScalars(0, var)
 
I was using 1 instead of 0 as I was getting the enum from vtkDataSet rather
than vtkDataObject, which is why it couldn't find my variable (it was
looking for cell data rather than point data). Confusion on my part (partly
due to lack of coffee), but thank you for providing the example.
 
Regards,
 
Adriano
 
===================================

Adriano Gagliardi MEng PhD
Business Sector Leader
Computational Aerodynamics
Aircraft Research Association Ltd.
Manton Lane
Bedford

Tel: 01234 32 4644
E-mail: agagliardi at ara.co.uk
Url: www.ara.co.uk 
 

  _____  

From: aur.marsan at gmail.com [mailto:aur.marsan at gmail.com] On Behalf Of
Aurélien Marsan
Sent: 02 July 2010 10:28
To: agagliardi at ara.co.uk
Cc: paraview at paraview.org
Subject: Re: [Paraview] Compute gradients


Here an example to compute the gradient of var, and store the result as
new_var. 



g = vtk.vtkGradientFilter()
        g.SetInput(Bloc)
        g.SetInputScalars(0, var)
        g.SetResultArrayName(new_var)
        g.Update()
 
Bloc.GetPointData().AddArray(g.GetOutput().GetPointData().GetArray(new_var))



Maybe you forgot the "Update" ? 


2010/7/2 Adriano Gagliardi <agagliardi at ara.co.uk>



Does anyone have an example of using vtkGradientFilter to compute the
gradients of a single vector in your data-set? I've tried using
SetInputScalars, but it tells me that there is no input array,. although the
array I pass it does exist.

===================================

Adriano Gagliardi MEng PhD
Business Sector Leader
Computational Aerodynamics
Aircraft Research Association Ltd.
Manton Lane
Bedford

Tel: 01234 32 4644
E-mail: agagliardi at ara.co.uk
Url: www.ara.co.uk


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-- 
Aurélien MARSAN
Doctorant Cifre Turbomeca/LMFA
aurelien.marsan at ecl2009.ec-lyon.fr
06.31.98.26.73


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This email contains information that is private and confidential and is intended only for the addressee.
If you are not the intended recipient please delete it and notify us immediately by e-mailing the sender.
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Aircraft Research Association Ltd.  Registered in England, Registration No 503668 Registered Office:
Manton Lane, Bedford MK41 7PF England VAT No GB 196351245

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