[vtkusers] problems rendering concave polygon

[Karthik Krishnan]

You can't render concave polygons like that. Internally, GL_POLYGON is used
to render them and that doesn't work for concave polygons. You'll need to
tesselate them. Use vtkPolygon::Triangulate to do a ear cut triangulation
and if that fails, use vtkDelaunay2D after generating sample points inside
the loop.

--
karthik

On Sun, Nov 20, 2011 at 10:14 AM, mandalin <mandalin147 at gmail.com> wrote:

> Greetings !
>
> When I render concave polygons, a black flickering region seems to fill a
> portion of the concave area that should be empty.
>
> I see this complaint on older posts, has this been resolved ? I would
> prefer
> not running them through a triangle filter, is there another option?
>
> Thanks in advance,
> Amanda
>
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