There is a follow-up article linked[1] from the OP article, I almost missed it -- the combination of the two actually makes a really good explanation. This is

There is a follow-up article linked[1] from the OP article, I almost missed it -- the combination of the two actually makes a really good explanation. This is a pretty cool algorithm and data-structure set. Thanks for the link, and keep these types of articles coming :) [1] for easy reference: http://www.kyleschouviller.com/xna/quadtree-code-design/ http://www.kyleschouviller.com/xna/quadtree-code-design/