Note from Ray: This is the fifth iOS 5 tutorial in the iOS 5 Feast! This tutorial is a free preview chapter from our new book iOS 5 By Tutorials. Enjoy! Welcome back to our Beginning OpenGL ES 2.0 with GLKit series! In the first part of the series, we showed you how to create a simple GLKView and GLKViewController based project from scratch. In the process, you learned all about what these classes