[Paraview] Problem to compute the gradient of a scalar field

[Stéphane Dellacherie]

Dear Andy,

Thank you for your answer.

I don't find the "tesselate filter" in the alphabetical list : would you 
tell me what is the right filter ? Thank you.

Moreover, if the pb is due to the fact that I use quadratic triangles, 
the filter GradientOfUnstructuredDataSet should works after the use of 
the filter PointDataToCellData ? But it does not still work.

Best

Stéph


Le 14/07/2016 20:17, Andy Bauer a écrit :
> Hi,
>
> It looks like gradients aren't getting  computed properly for 
> quadratic triangles. A quick work around is to use the tesselate 
> filter to subdivide the quadratic triangles while converting them to 
> linear triangles. The gradient of unstructured data filter should work 
> after that. I'll add in a bug report to see about getting this fixed 
> as well.
>
> Best,
> Andy
>
> On Thu, Jul 14, 2016 at 5:23 PM, Stéphane Dellacherie 
> <stephane.dellacherie at polymtl.ca 
> <mailto:stephane.dellacherie at polymtl.ca>> wrote:
>
>     Dear Colleague,
>
>     I am trying to use the fielter GradientOfUnstructuredDataSet on
>     the field T which is in the vtk file example.vtk (see the joined
>     file). Nevertheless, I only obtain a NULL gradient (see the file
>     tutu.png) although the T field is not a constant scalar field.
>
>     Is it normal ?
>
>     Thank you for your help !
>
>     With my best regards.
>
>     Stéphane
>
>     -- 
>     ___________________________________________________________
>
>     Stéphane Dellacherie
>
>     CEA Paris-Saclay / Direction de l’Énergie Nucléaire
>
>     École Polytechnique de Montréal / Dpt de Génie Mécanique
>
>     Tél. : (001) 514.340.47.11 (#2488)
>     ___________________________________________________________
>
>
>
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-- 
___________________________________________________________

Stéphane Dellacherie

CEA Paris-Saclay / Direction de l’Énergie Nucléaire

École Polytechnique de Montréal / Dpt de Génie Mécanique

Tél. : (001) 514.340.47.11 (#2488)
___________________________________________________________

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