cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   michaelm
   Member

   Hi I'm hoping someone has an idea about this. I blocked loading everything else but one AtlasSprite manager and sprites. The sprites are all large, 512 x 256. With an AtlasSprite with only a block of nontransparent pixels I can load several without much of an fps hit, but if I load one of the nontransparent then another with transparency, it drops from ~60 fps to 30 fps. Just from loading two AtlasSprites. I've blocked out all movement and updating, sound effects...

   I also have a hud display on another layer with regular sprites that doesn't seem to drop fps. I thought one AtlasSprite sprite didn't cost much more than several. In instruments it's taking over 50% of the time in AtlasSprite drawTextureQuads even when everything is loaded and updating with sound effects etc. Is it overdraw? is there any way around this or has anyone else run across this?

   Posted 2 years ago #
2. 

   exorcyze
   Member

   Not positive, but I would venture a guess that the size of your sprites could be gobbling up the memory that the device wants to use for rendering, causing a slowdown?

   Someone else may be able to confirm / deny this possibility.

   Have you tried doing a test of making that sheet 1/4 size ( and the resulting atlas sprites that are being rendered from it ) and seeing if it's the same performance drop?

   Posted 2 years ago #
3. 

   michaelm
   Member

   I haven't changed the sprite sheet size, but I have changed the size of the AtlasSprites. It helps, the fps rises but not to 60 probably gain 10 fps if I cut both sizes in half.

   Posted 2 years ago #

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