[vtkusers] How to use backface culling with polylines

[David Gobbi]

Jerome is correct, OpenGL culls faces according to the polygon
winding.  So wireframe polygons can be culled, but polylines cannot,
even if they have normals assigned to them.  There are some details in
the OpenGL FAQ:
http://www.opengl.org/resources/faq/technical/clipping.htm

  David

On Wed, Nov 17, 2010 at 11:47 PM, Jérôme <jerome.velut at gmail.com> wrote:
> Hi Donny,
>
> My feeling is that backface culling should not work with polylines because they
> have actually no face.
>
> Jerome
>
> 2010/11/18 Donny <donnyz at charter.net>:
>> I am drawing polylines using vtkPolyData and cannot get backface culling to
>> work with them.
>>
>>
>>
>> I ran into this subject
>> http://public.kitware.com/pipermail/vtkusers/2003-January/065023.html , but
>> did not help.
>>
>>
>>
>> Any solutions?
>>
>>
>>
>> Donny Zimmerman
>>
>> donnyz at charter.net
>>
>> 308-227-1756