[osg-users] Best way to debug detected OpenGL error 'invalid value' at top of State::apply(StateSet*)

[OpenSceneGraph Users]

> take a look at the GL_KHR_debug and GL_ARB_debug_output extensions. They
> add some checking to OpenGL state changes and report errors.

You can set a breakpoint in the callback function for the errors and
the backtrace will then show you the OpenGL function and its call from OSG.

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