These are ‘Tutors’, not ‘Tutorials’. More accurately, they are little laboratories for experimenting with OpenGL parameters. Each laboratory has a graphic pane showing an object, and a pane showing the key functions for that aspect of OpenGL. You can change the parameter values by dragging, and see immediately what is the visual effect of a parameter value change.
I just yesterday found the fog tutor very helpful in understanding why my own fog generation was not looking as it should (and in making it right). Take a look.
David
