[Paraview] Fwd: quadrangle mesh visualization

[Berk Geveci]

---------- Forwarded message ----------
From: Berk Geveci <berk.geveci at kitware.com>
Date: 2010/1/20
Subject: Re: [Paraview] quadrangle mesh visualization
To: HUGUET Frédéric 223652 <frederic.huguet at cea.fr>


That's not correct. You have triangles (hence the triangle strips). If
you want to display quads, you have two choices: use polygons for the
polydata or use quads with unstructured grid. It would look like:

POLYGONS 9 45
4 0 1 5 4
4 1 2 6 5
4 2 3 7 6
4 4 5 9 8

or (for unstructured grid) like:

CELLS 9 45
4 0 1 5 4
4 1 2 6 5
4 2 3 7 6
...

CELL_TYPES 9
9
9

Hint: Use the plane source and save it out as a ASCII VTK file to see
an example. If you want unstructured grid, first apply the Clean to
Grid filter.

PS: Is it OK for me to forward this to the paraview-users list?

Best,
-berk


2010/1/20 HUGUET Frédéric 223652 <frederic.huguet at cea.fr>:
> What do you mean by "second order quad" ? In my case it's only a quadtree based mesh (so elements are juste rectanbles, but when I display it with paraview, one diagonal of each rectangle is displayed and I don't want that).
>
> For example the mesh connectivity in the vtk mesh file is this one :
>
> TRIANGLE STRIPS 7336 36680
>
> 4 0 81 82 85
> 4 81 25 85 84
> 4 82 85 26 83
> ....
>
> And so on.
>
> I have rectangles but displayed as triangles.
>
>
> Frédéric Huguet, PhD
>
> LETI - CEA Grenoble
>
> Laboratoire d'Ingénierie Nanophotonique
>
> 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
>
> -----Message d'origine-----
> De : Berk Geveci [mailto:berk.geveci at kitware.com]
> Envoyé : mercredi 20 janvier 2010 15:43
> À : HUGUET Frédéric 223652
> Cc : paraview at paraview.org
> Objet : Re: [Paraview] quadrangle mesh visualization
>
> Is this a second order quad by any chance? Can you post a dataset?
>
> -berk
>
> 2010/1/20 HUGUET Frédéric 223652 <frederic.huguet at cea.fr>:
>> Hi,
>>
>>
>>
>> I have vtk quadrangle mesh i visualize with paraview.
>>
>>
>>
>> I have a problem : paraview displays the diagonals of every quadrangle
>> element in my mesh. How do I eliminate them from display ?
>>
>>
>>
>> Thank you,
>>
>>
>>
>> Frédéric Huguet, PhD
>>
>> LETI - CEA Grenoble
>>
>> Laboratoire d'Ingénierie Nanophotonique
>>
>> 17 rue des Martyrs, 38054 Grenoble Cedex 9, France
>>
>>
>>
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