How to create a class to wrap GLUT?

Question

I\'m writing a game for school in OpenGL. Since there will be several more similar assignments I want to make a small framework for doing common things in OpenGL. I have mad

Answer 1

Two points,

First, glutMainLoop never returns, and starts dispatching messages. Because you called it from your constructor your class is potentially not properly constructed yet. Additionally glut does support more than one window, and glutModalLoop only needs to be called once.

Second, as you have noted, the method passed to glutDisplayFunc must be static. You will need a static array associating glut window id's with IO pointers. When glutCreateWindow is called by an IO instance, store the returned id and IO instance in the array. Whenever the static drawScene is called you would call glutGetWindow to get the id of the current window, and look up the associated IO pointer and call the non static drawScene implementation.