cocos2d for iPhone

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

1. 

   andreh
   Member

   Is it possible to use ParticleSystems in SpriteSheets for a performance benefit? I'm guessing not since ParticleSystems inherit from CCnodes and not from CCSprites.

   André

   Posted 1 year ago #
2. 

   Pearapps
   Member

   Dont think you can.

   Posted 1 year ago #
3. 

   crmagicxxx
   Member

   You can't add particles to sprite sheet, but particles utilize its own "batch draw" for displaying on the screen. So when you add particles it's only one more OpenGL call for your app, so no big difference

   Posted 1 year ago #
4. 

   andreh
   Member

   Thanks. Do you know if each ParticleSystem instance has its own draw call for all its particles, or would multiple ParticleSystems share a call?

   I'm not getting acceptable performance with more than 2-3 emitters (I'm shooting for 10-20), but perhaps that's just the nature of these beasts.

   André

   Posted 1 year ago #
5. 

   CJ
   Moderator

   Each system will do a draw of its particles. I too would like to have a multi-emitter solution to particles. But cocos2d doesn't have this yet.

   Posted 1 year ago #
6. 

   ddeaco
   Member

   I'm trying to do an effect that requires a few emitters but i cant get the performance on older devices. Something like CJ suggested would be very helpful.

   Posted 1 year ago #
7. 

   Adam Allen
   Member

   What if each emitter uses the same texture? There must be a way to reference that single texture instead of embedding it in each particle plist, right?

   Posted 1 year ago #
8. 

   araker
   Moderator

   The texture from a emitter is loaded into the texture cache, when initializing the other emitters they get a reference to the texture from the cache. So if you draw all the emitters after each other, there wouldn't be a texture switch in between, which is a small performance benefit.

   If you make sure the texture is loaded before initializing the emitter, then the textureImageData in the plist can be removed.

   Posted 1 year ago #
9. 

   Mark Sawicki
   Member

   I'm not sure how much work it would be to update the code, but this thread talks about reusing particle systems for added performance

   http://www.cocos2d-iphone.org/forum/topic/177

   -Mark

   Posted 1 year ago #
10. 

    Adam Allen
    Member

    I found that Particle Designer was naming the texture the name I gave the plist. Even though it was the same image, it was creating a new texture for each system.

    1. When saving your plist in Particle Designer, uncheck Embed Texture.
    2. Add your texture png to your project. Can't be in an atlas, yet.
    3. Open your particle system plist files and edit the texture name to be the same.

    <key>textureFileName</key>
    <string>texture.png</string>

    Your texture will be properly cached!

    Posted 1 year ago #

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