I like to use glutidlefunc() to do some animation, but I have to open another
GTK window in my program.It seems that
only one window can be used with glut,
is there any solution to the problem,or...

how can I do animation in opengl
for example, a small ball go from
left screen to right screen.Thanks
a lot!

I need to do some animation,the way I know
now is to use glutIdleFunc(Animation);
Is there any other methods to do animation or
how is glutIdleFunc implemented?
because I have to use GTK as...