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PAj
Member
Hello,
In the mid stages of beta testing a game and have come across an oddity.
We use particles extensively, cocos2d 0.99.5 and box2d.
We are seeing better performance on an iTouch 2ndGen (55fps) versus an iPhone 3G (25fps).
We have tried running the phones in airplane mode. Turning off all iAd code, etc but we still see worst performance on phones.
Anyone know why this might be the case?
Thanks,
PAj
The iTouch 2nd gen is faster than the iPhone 3G, since the processor is clocked higher. The difference in performance is bigger though then I would expect. To debug this further you can profile your app on both devices and see if there are big differences in the code parts that take up most of the processor time.
One other thing, are you using auto rotation?
PAj
Member
Thank you.
I tried this but I use the camera to do zooming which is now not zooming correctly.
I use an unusual offset zoom that zooms and centers on an object not in the center of view. Now it seems like all zooms happen about the center of view.
Here is an example of the camera zoom when my object moves:
deltaY1a = ObjectS.position.y - 230;
[self.camera setCenterX:-(0.86*deltaY1a) centerY:(0.57*deltaY1a) centerZ:0];
[self.camera setEyeX:-(0.86*deltaY1a) eyeY:(0.57*deltaY1a) eyeZ:deltaY1a]; // 1.1566fLet me just quote the new GameConfig.h real quick:
// Define here the type of autorotation that you want for your game
// 3rd generation and newer devices: Rotate using UIViewController. Rotation should be supported on iPad apps.
// TIP:
// To improve the performance, you should set this value to "kGameAutorotationNone" or "kGameAutorotationCCDirector"
#if defined(__ARM_NEON__) || TARGET_IPHONE_SIMULATOR
#define GAME_AUTOROTATION kGameAutorotationUIViewController
// ARMv6 (1st and 2nd generation devices): Don't rotate. It is very expensive
#elif __arm__
#define GAME_AUTOROTATION kGameAutorotationNone
So, either go kGameAutorotationCCDirector, or just disable it altogether. (you could still offer a manual rotation, if you need to)
PAj
Member
It's weird but my GameConfig.h file doesn't have these comments in it (would have helped if it did). I'm using cocos2d 0.99.5 so kinda surprised it's not in there.
I simply changed from
#define GAME_AUTOROTATION kGameAutorotationUIViewController
to
#define GAME_AUTOROTATION kGameAutorotationNone
Anyway, my problem is more so why the camera has changed it's offset/zoom properties going from kGameAutorotationUIViewController to kGameAutorotationNone.
I agree with what araker says. We should go either with kGameAutorotationCCDirector or kGameAutorotationNone unless we desperately need kGameAutorotationUIViewController.
Here's my question:
Is there a much performance gain of kGameAutorotationNone as compared to kGameAutorotationCCDirector, especially in iPhone 3G or old devices? I have been using kGameAutorotationCCDirector for all types of devices. I was wondering if I have to specify differently for very old devices.
@Paj, seems like you've discovered a bug. That behavior is unexpected indeed. Could you file a bug report in the issue tracker?
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