[osg-users] painting plane

Korolyov Ilia ya-breeze at ya.ru
Thu Sep 11 03:46:51 PDT 2008


Hello, Robert

Thanks so much - it really helps

Ilia

В Чтв, 11/09/2008 в 11:38 +0100, Robert Osfield пишет:
> Hi Ilia,
> 
> If one side of the plane should be red, and the other blue then you
> could render two polygons for the plane, each with opposite winding
> and colour, then use glCullFace(osg::CullFace) to cull the faces to
> give the illusion of changing colour.  The other technique you could
> use of two sided colour in the OpenGL lighting/material model, not all
> hardware/drivers supports two side lighting though.
> 
> Robert.
> 
> On Thu, Sep 11, 2008 at 11:22 AM, Korolyov Ilia <ya-breeze at ya.ru> wrote:
> > Hello
> >
> > I need to draw a plane (more exactly two lines by three points). Problem
> > is in plane color. It must depends on camera position relative
> > plane side - red or blue.
> >
> > I did it with CullCallback, because it's only one way to get access to
> > camera, which I can find.
> >
> > What is right way to do it?
> >
> > Thanks
> > Ilia
> >
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> >
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