[osg-users] Trouble with a simple shader program.

Alexander Wieser alexander.wieser at crystalbyte.de
Sun Apr 12 05:32:34 PDT 2015


thank you for providing me with some insight.
I had already stumbled upon exactly this example:

>   // for non GL3/GL4 and non GLES2 platforms we need enable the osg_ uniforms that the shaders will use,
>     // you don't need thse two lines on GL3/GL4 and GLES2 specific builds as these will be enable by default.
>     gc->getState()->setUseModelViewAndProjectionUniforms(true);
>     gc->getState()->setUseVertexAttributeAliasing(true); 

I was under the assumption that my machine uses the GL4 core program.
After further inspection I realized that Ubuntu runs OpenGL 4.3 in Compatibility Mode for whatever reason.

After changing everything back to the gl_ prefix I can now see the red color.

Thank you!


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