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[MiKom3]

I'm developing a graphics engine in which graphics and game logic are executed in separate threads. CG is used as shader language.

When I try to update shader parameters from the logic thread (during scene graph evaluation) program crashes on CgSetParameter*() functions. OpenGL context was created in the rendering thread.

When I changed the engine to be single-threaded everything works fine.

Multi-threaded version works fine on NVIDIA cards.

So my question is: is it possible to change shader parameters from thread that hasn't created OpenGL context?

[Byron]

CG is nVidia’s shader language, we don’t support it...

You should be using GLSL on OpenGL instead and you mention that everything works fine in single-threaded but it shouldn’t.