In my project I had intended to use physics via AwayPhysics. Running on PC, I got 60 fps easily, but running on iOS (6.1.3, on iPod Touch 4th) the app runs at 1 fps! When disabling physics, then I got 30 fps on it. On my Android tablet the problem is like: 30 fps only (reminding that that tablet has a better processor + gpu).

Is it possible to use AwayPhysics on mobile devices? Or should I try other engine? Should I adjust the apps for their operating systems?

Thanks in advance

Before look at Physics, I would first ensure that project runs 60/60 on the device. If it runs 1/2 speed, means you likely have some work to do memory management, geometry & material optimalisations…

Fabrice Closier - 07 May 2013 01:13 PM

Before look at Physics, I would first ensure that project runs 60/60 on the device. If it runs 1/2 speed, means you likely have some work to do memory management, geometry & material optimalisations…

I created a simple scenery with:
- 36 poly (I just added 11 meshes - all cubes - with no material);
- Memory consumption = between 9 and 16 MB (it depends of device).

Others details: The hoverController is not used (the camera position is calculated by another way) and ligths are disabled. And there are some event listeners, like on enter_frame, mouse_event and accelerometer.

Modifying the sample, adding only 10 meshes (cube), and also removed physic, light, the Starling layer and the event listeners (expect the enter_frame event listener) I got 60 fps on iPod touch 4th, but ~40 fps on Android tablet. :/

Mobile dev is not much different than the good old flash 10 dev. The art is to do much with very little…

The best solution is to create a native extension for the bullet physics engine or if you have very simple physics scene create a lightweight engine on your own.

@Fabrice Closier I’m beginning to think is it! ^^

@Oussama Well, my project it’s about an adventure game, with a bit of physics involved (jumping platforms and simple collision, without bounciness, or related). It seems really that is the way as you wrote. I’ll try, tks

Now I’m testing JigLib engine, and it seems to have a better performance than AwayPhysics. Is it true or am I mistaken?

AwayPhysics will not give 60FPS till you publish your project as release build, also I tried Jiglib but AwayPhysics is much faster.

And how to make release build? Crashes everything for iOS.

I’m hoping someone will respond to 62316e.

I’ll respond, but since this thread is a year old now - I hope you found your answer long ago..

In Flash-Builder simply go under the project menu and select Export Release Build.  It will then create the *.apk file (for android) and/or the IPA file (for iOS) which you can then in turn install on your device (or simulator).

Good luck!