OpenGL Programming Guide: The Official Guide to Learning OpenGL, Version 4.3, Eighth Edition

Running the Program

After all the setup is completed, GLUT programs enter an event-processing loop, glutMainLoop().

void glutMainLoop(void);

Enters the GLUT-processing loop, never to return. Registered callback functions will be called when the corresponding events instigate them.

Note

For those of you familiar with previous versions of GLUT (regardless of whether it’s the Freeglut version or the original), various features—like menus and shapes, for example—will not work when you ask for a core profile, as they use deprecated features. If you need those features, the simplest approach is to ask for a compatibility profile.