In this screencast (OpenGL video tutorial), I explain how to add an overlay to your OpenGL window. I also explain how to use glPushAttrib().

OpenGL commands used in this screencast:
glPushAttrib()

OpenGL parameters used in this screencast:
GL_TRANSFORM_BIT, GL_ENABLE_BIT

The code is available to download on Github

Download the screencast (HD), 35.3 MB .mov

Watch the Screencast

YouTube

Code (this is not all of the code- please see the github link above for all of it)

Questions? E-mail me: this domain AT gmail DOT com