I am using glutGameMode. I set up my rendering function via glutDisplayFunc(), and I go into glutMainLoop()óbut sometimes when I run it, the DisplayFunc is not getting called! At first I thought my rendering code was buggy, but then I used SysBeep() to figure out that GL isn't calling my rendering function in the first place. Sometimes it works, sometimes it doesn't. I tried reinstalling OpenGL and linking to a different glut.lib, but nothing helps. I am using system 9 with CodeWarrior IDE 4.04. Any ideas?

Thanks in advance!

My recollection is that GLUT's game mode is only partially implemented on MacOS9. It's certainly severely lacking on MacOSX. Are you checking glutGameModeGet(GLUT_GAME_MODE_POSSIBLE) before glutEnterGameMode()?