[osg-users] Missing features with GL Core profile

Julien Valentin julienvalentin51 at gmail.com
Wed Apr 17 06:59:19 PDT 2019

core gl 3 have deprecated lot of stuff (including fixed pipeline lighting and material) . Some basic fixed features have been emulated because there are kinda required to render (fixed pipeline matrices), but lighting didn't.
You can contribute on that (follow State::useModelViewAndProjectionUniforms to see how deprecated matrices have been emulated)

PS:glLineWidth requires GL_LINE_SMOOTH to be enable...

Hugal31 wrote:
> Hi,
> I use OpenSceneGraph and I want to use some features of OpenGL 3.3 and the Core profile. I compiled OpenSceneGraph with the option -DOPENGL_PROFILE=GL3. I got the features I wanted, however, some features of OSG do not work anymore, as lighting with osg::Light, osg::LineWidth, osg::LineStipple on so on.
> I know OSG is mainly built uppon GL2 features, and that Fixed Function Pipeline is not available in core profile, but I expected for "basic" features as light or lines to work.
> It the support of those features in Core profile is planned? Or do I have to implement shaders myself? Or are there any existing implementation?
> Thank you for your time,
> Hugo

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