Question on Open GL and Cocos2D « cocos2d for iPhone

Question on Open GL and Cocos2D

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gerch
Member

Hi guys

I dont know if this is a more specific question of Cocos or Open GL

but i was wondering if a object (may it be a sprite, texture, etc) is not in the viewable area of the camera will open gl/cocos2d still render it?

hope its kinda clear :)

Thanks

Posted 2 years ago #
Serban
Member

I would need to double check the code to be sure, but my first thought is that cocos2d is not doing any sort of culling. If your sprite is offscreen it will still be sent to OpenGL for rendering.

Serban

Posted 2 years ago #
Steve Oldmeadow
Administrator

I assume you only want to know this for performance reasons? Look at test E in the performance tests where 80% of the sprites are offscreen. It looks to me that if you use a texture atlas (sub test 10,11,12) then there is no need to cull off screen sprites yourself.

http://www.cocos2d-iphone.org/wiki/doku.php/perf_test:0_8

Posted 2 years ago #
gerch
Member

cool thanks... that was pretty interesting and good to know :)

Posted 2 years ago #

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