Wow, I am flattered, I certainly didn't expect my tutorial to be preferred to Dan's one! Well, I suppose that attacking a problem from different angles please different people. Or I provided complementary information: when I self-learn stuff (always...), I like to read various sources to change the ways things are explained, illustrating different facets of the problems.

Perhaps I should revive and continue this series of tutorials in the wiki, since the old board is closed.

@phi.lho This would be amazingly helpful! 

I'm sure I'm not the only one interested in using box2d for Android apps with Processing. 

With your tutorials on boxwrap2d, I'm a little confused about how I use box2d to calculate the physics of different shapes while drawing them as I like. I can't see any way to not have boxwrap2d draw the shapes, and I'm not sure how to find the positions of the different shapes once they are created in CreateObjects(). 

Maybe is this what pbox2d does?