[Paraview] Concave polygons

[David E DeMarle]

GL doesn't handle concave polygons and subdividing concave polygons into
convex ones would add substantial overhead to the common case when none are
present, so VTK and therefore ParaView do not either.

See this thread where the issue was recently discussed for ideas about how
you might go about fixing the the geometry so that it is rendered well.

http://markmail.org/message/e3fal43v6wzwkgm4

David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109


On Thu, Jul 1, 2010 at 4:28 AM, paul.barrere <paul.barrere at laposte.net>wrote:

>
>
> Hello,
>
> I have written a vtu file with a concave polygon (see the image"
> concave.png" enclosed). I am surprised because the rendering in ParaView is
> inappropriate (the mode is "Surface").I tried the same thing with a vtp file
> and it was the same result. Moreover, when I try to visualize a vrml file
> which contains concave polygons (see the image "building.png" enclosed), I
> have the same problem. In a vrml viewer, the concave polygons are well
> rendered. Am I wrong or ParaView only treats the convex polygons ? Should I
> triangulate my files ?  (I don't want to triangulate because people can
> believe that there was a physic simulation).
>
> Thank you for your answers.
>
> Paul Barrère (trainee at Cerma laboratory, France)
>
>
> [image: Pieddemail]<https://compte.laposte.net/inscription/index.do?jeux=201001FOOTER>
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