[Paraview-developers] Calculation of Gradient for Unstructured Grid Data

[Moreland, Kenneth]

At each point, this filter finds all cells neighboring that point.  For each cell, it computes the gradient (by calling vtkCell::Derivative) at the location of the point and then averages the results for all cells.  If you click on Faster Computation, then the filter will compute one gradient at the center of each cell, and then average those to each point (the equivalent of the cell to point filter).

-Ken

   ****      Kenneth Moreland
    ***      Sandia National Laboratories
***********
*** *** ***  email: kmorel at sandia.gov
**  ***  **  phone: (505) 844-8919
    ***      web:   http://www.cs.unm.edu/~kmorel

From: Jayesh Badwaik <jayesh.badwaik90 at gmail.com<mailto:jayesh.badwaik90 at gmail.com>>
Date: Sat, 6 Aug 2011 01:52:06 +0530
To: <paraview-developers at paraview.org<mailto:paraview-developers at paraview.org>>
Subject: [Paraview-developers] Calculation of Gradient for Unstructured Grid Data

Hi

I don't know if this is the right place to ask since I am not actually trying to contribute anything.
Just curious about some feature's development part. So please excuse me if this is not the right place.

I've been using the function in paraview to calculate the gradient of an unstructured Grid Data.
(Filters->Alphabetical->Gradient (Unstructured) )
I've noticed that the gradient of the data is available at the nodes of the grids when the data
itself is available at the nodes of the grids. I was curious as to what method, technique  or
idea was used to implement the feature. I myself need the same feature. And hence, I was curious.

I have been trying to read the wiki and the class documentation. However, I am not sure I am finding the
right gradient file.

Thanks in Advance

Cheers and Regards
Jayesh Vinay Badwaik
Electronics and Communication Engineering
VNIT, Nagpur
INDIA

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"We are servants rather than masters in mathematics" -- Charles Hermite

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