I am looking forward to develop a 2d game, but I really want to use the OpenGL library, I will probably use the LWJGL as a wrapper.
My main problem is that I don't know what version I should learn.. I have learned the basics of 1.1 and did a simple game and painted few cubes on the screen.
I want my game to be able to run almost on every computer(something in the zone of minecraft) and when I mention every computer, I also mean OS because I've understood that only few versions of OpenGL can run on mac.
So my question is simply, what version should I learn for my needs?
If you can, please provide me a few good resources, books are acceptable too.
Thank you very much in advance