[vtk-developers] Problem with tetrahedron face orientation in vtk-5.8.0-15 (debian jessie repositories)

[victor sv]

Hi again,

it seem that something was wrong with mesa drivers. Now i'm using the
nvidia drivers and i can see the meshes full fill of color over the both
sides of the faces.

Regards,
Víctor.


2014-03-11 11:40 GMT+01:00 victor sv <victorsv at gmail.com>:

> Hi all,
>
> currently i've remarked a strange behavior representing boundaries in
> meshes with python-vtk (5.8.0-15) on Debian Jessie.
>
> I'm using classic VTK files (non XML files) to store mesh connectivities
> and element references (with constant fields). This files are the result of
> a conversion from other FE mesh formats, where we ensure the positive
> jacobian in every tetrahedral element in order to have a good element and
> face orientation.
>
> I never have problems with the visualization of face references, correctly
> oriented, except with this version. Doing the same tests in other VTK
> versions and SO's, it seems that VTK represents the faces full filled of
> color when you look from both directions.
>
> Is there some known issue about that?
>
> I attach the mesh and a picture showing the result with this version where
> you can see 2 triangles (faces), one well oriented and the other with a
> wrong orientation.
>
>
> Regards,
> Víctor.
>
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