loading images causing jerk

cocos2d-x C++
#1

Hi ,

In my app,images are created and they are moved on the screen continuously.

My problem is , when i am loading a new image, the ones already on the screen are facing a jerk.(They pause for a small time)

When i tried loading all the images previously and using them jerk is not there,but i can do that since it takes a lot of memory.

Also,this jerk reduces as the game progresses,and is completely gone after some time.

Any idea why this is happening ? And how to correct it?

Thanks.

#2

Loading an image on a mobile device can take some time and cause FPS drop. That is why you see it pause for a small time. You could load textures in another thread so the main thread won’t slow down. There was some method like addImageAsync() for this.

#3

Try using sprite sheets or batch nodes.

#4

Yeah, you need to use sprite sheets. I have an example app that uses a sprite sheet:

http://www.gmtdev.com/blog/2011/08/19/how-to-use-box2d-for-just-collision-detection-with-cocos2d-x/

#5

Hi

Thanks for all your replies.

Actually , i am loading ccbi nodes(from cocosbuilder), which internally contains large images.

can i still use sprite sheets?

i can try loading them in different thread

#6

I’m not familiar with the ccbi files but you could try loading them in a pthread (type pthread in the search box above for some info).

I don’t think you can “create” the sprites in the pthread, only safe in the main thread, you might be ok depending on how Cocosbuilder works…