Stereo 3D images with OGL article.

I was really intregued by the article on “Creating stereo 3D images using OpenGL that are valid with or without glasses.”

Now I’m still a newbie to OGL and I’d like to give that stereo 3d method a try. I have sucessfully created my own 3d object viewer, but how do I add in the color keying the article talks about? Does anyone have a demo and source code to the stereo color keying the article mentions?

The article itself is great in explaining how the 3d glasses work, but the sample code is a little vague to me.