I've started making a new Chipmunk Showcase app. The old one was like 3 years old, and I was getting a little embarrassed to show it to people anymore when they asked about Chipmunk. It was written for iPod 1G performance, used an ancient version of Chipmunk, used the ugly and painfully slow debug rendering code, and wasn't even retina capable. I also wanted something I could use for Chipmunk Pro sample code.
It's written using UIKit, GLES2, and Chipmunk Pro. It shows how to do some neat things I thought people might be interested in seeing the code for. The physics is run on a fixed update (generally 60 Hz) while the rendering is not which allows it to run a super smooth timescale effect. It also has a fairly fast, anti-aliased, immediate mode, GLES2 based vector renderer.
Grab the code on GitHub:
Not much too it yet. Three fingered left swipe to show the demo controls. Three fingered right swipe to go to the next demo. I plan on porting most of the Chipmunk 6 desktop demos. Now that I have most of the base code working, it should be pretty easy.