Forums » Help » Box2D and Mobile

I've been playing with the new Box2D engine that Dominic (beautifully) integrated with impact. I've tried developing with Box2D before, and as it is a great engine, it doesn't seem to work with mobile as it uses too much resources and lags the game. Has anyone found a way around this or has any development tips on how to make impact and Box2d work in a mobile game? Thanks in advance :)

I just updated the physics demo to work well on mobile devices. Added some buttons, adjusted the screen size and turned background pre-rendering on:
http://impactjs.com/demos/physics/

I have about 30-40fps on my iPhone 3GS and iPad. When a lot of collisions are happening the game slows noticeably down, but I'd say it remains nicely playable at all times.

So, if you follow the basic principles of this article you can achieve a nice framerate for a Impact+Box2D game on mobile devices :)

Thanks Dominic, your support on these forums is amazing.