I’ve finally gotten around to updating my original Windows Store Bullet Physics demo (http://www.taumuon.co.uk/2012/04/bullet-physics-and-directx-11-on-windows-8-metro.html) to build for the Windows 8 final release.
While I was at it, I also got it working for Windows Phone 8 – code is on github https://github.com/taumuon/WP8-Bullet. There weren’t many changes. In building Bullet for ARM, I got around lots of parameter alignment issues by defining BT_USE_DOUBLE_PRECISION. This was the quickest thing to do, and may have performance implications but the performance running on my Nokia Lumia 920 seems encouraging. It wouldn’t have been a much bigger change to instead see if ARM is defined.