I am developing a game in OpenGL/GLUT and I need to open a new window to show the score when the game is won.
In order to do this, i will call glutCreateWindow() and register the callbacks after calling mainEventLoop().
Is there a problem with this ? How should I do it properly ?
Is there a problem with this?
Yes.
Why don't you simply draw the results in the same window as the game?
Why are you using GLUT in the first place? It's not a very good framework for games. Better use GLFW or SDL.
How should I do it properly ?
By adding a small GUI system to your engine, that allows you to overlay the screen with stats (like a HUD) and a score screen.