Rotozoom without the skew

[TerryRitchie]

This rotozoom is much better than the one I currently use that was modified from Galleon's rotozoom posted way back on the original forum from 2010. I would like to incorporate it into my library and credit the authors. I just want to get this straight, this code was originally written by Bplus and then modified by James to fix the skew, correct? Would this be considered RotoZoom version 4?

Also, may I show this code on the tutorial in lesson 17: Movement and Rotation?