cocos2d for iPhone

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

1. 

   Onion
   Member

   Hi!

   I'm trying to decide what would be best approach to render multiple small particles on screen. All sprites will have the same texture. A particle, or set of particles will be drawn on screen on drag event, and will not move from their positions after being inserted. I'll need to be able to remove or fade away particles later after some time. Currently i am using normal sprites (assigned as child of CCSpriteSheet), which works, but i'd like to have even better performance as there are a lot of particles to be drawn.

   I have a couple of solutions in mind:

   1. Using render texture. The problem is that i'll need to be able to remove the particles also afterwards, I'm not sure if i can accomplish this with render texture?

   2. Creating a version of a point particle system, where particle properties won't have any effect, i'd only add particles on drag events and keep them there until further notice.

   I'd be very grateful for any aid on this. If you have any better ideas or comments on above ones, please share :)

   Posted 1 year ago #
2. 

   riq
   Key Master

   try to find out where is the bottleneck.

   1. only draw the sprites. no particles. Does it perform ok ?

   2. only draw the particles. no sprites. Does it perform ok ?

   if 1) and 2) is Yes, then mix them and follow the "best practices" from the wiki.

   I guess that you'll need to optimize 2), and create a sort of "particle manager" that draws multiple particles emitters in 1 batch. Currently each particle emitter is drawn it is own batch. So if you have 50 particle emitters, you'll have 50 batches

   Posted 1 year ago #
3. 

   Onion
   Member

   Hi!

   Thanks for your reply, i have tried debugging sprites/particles, and the particles do seem to slow things down. I figured out a way to use render texture in such manner that i can remove drawn particles from it (i just draw another sprite with custom blendfunc, which eliminates previously drawn sprite underneath). I just discovered this and will try it out.. if it won't, i'll try the approach you suggested.

   Cheers!
   - O

   Posted 1 year ago #

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