whatever you like to pay you can pay me. I got some good opengl and c++ expertise. I can help you. Please let me know in detail about your tasks. I got a lot of C++, OpenGL projects with me, and algorithms, if you want I can show you and if you want we can do modifications.
If you let me know your project details, I can make a small mock demo app for you. And based on that, you can decide if you like to work with me or not.