CCSpriteBatchNode with large transparent backgrounds

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CCSpriteBatchNode with large transparent backgrounds

(6 posts) (2 voices)

Started 5 months ago by aramk
Latest reply from aramk

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aramk
Member

I've written a bunch of classes for creating a parallax effect background which contains the ground, hills and clouds. Each object is duplicated once and this allows me to create an infinite loop with the ground etc. Problem is, using CCSpriteBatchNode and 12 x PNG 32bit textures with approx. size 600 x 200px slows down my FPS to around 30. I have read that using CCSpriteBatchNode shows big improvements in performance, but I can't seem to replicate them.

http://www.learn-cocos2d.com/2011/09/cocos2d-spritebatch-performance-test/

How can I speed things up?

Posted 5 months ago #
fet_loa
Member

I guess it all depends on how your implementation looks like, and how you use the batchnode(s).

Do you use one batchnode or a separate one for the ground, hills and clouds?

Posted 5 months ago #
aramk
Member

I used a single batch node and a single png...

Posted 5 months ago #
aramk
Member

Running it on my phone gives 60 FPS, but 30 FPS on the simulator. I figured my nVidia m330gt > ARM built in... It's probably not that simple, but I imagine there is some tweaking in the simulator and also in some of the foundation code for cocos2d.

Posted 5 months ago #
fet_loa
Member

Performance on the simulator is usually not very good. Never use the simulator as a performance indicator, that goes for all platforms (ever developed for Android? The Android emulator will make you want to throw up, that's how slow it is). After all, the device has a dedicated gfx processor.

Who knows if the simulator even uses your gfx card for opengl rendering (I don't anyway, but my guess it that it doesn't). Either way I'm pretty sure it's not optimized, and I wouldn't really see the reason for optimizing an emulator too much since it is solely meant for development, after all you are targeting the device, not the emulator :)

So don't worry too much about it, if it runs well on the device, mission completed :)

Posted 5 months ago #
aramk
Member

Thanks for the reply. Yes, I've used the QEMU powered Android emulator, it's horrid. Compared to that the iPhone Simulator is superb. I guess I'll stick to getting > 30 FPS on simulator and hope to reach 60 on the device. Cheers!

Posted 5 months ago #

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