cocos2d for iPhone

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

1. 

   jeffam112368
   Member

   I've poured over the documentation and various forums, but I can't seem to figure out the effect of the z order parameter for the AtlasSpriteManager. No matter what z order parameter I give the AtlasSpritemanager, I cannot draw ANY non-atlas sprite/node below the AtlasSprites attached to the AtlasSpriteManager. For example, I cannot have a ParticleSystem emitted draw particles beneath any AtlasSprites. E.g. is psuedocode:

   AtlasSpriteManager ASMgr = [AtlasSpriteManager spriteManagerWithFile:@"GPSatlas.png" capacity:50];
   [self addChild:ASMgr z:0 tag:0]; // NOTE: manager z order is 0
   AtlasSprite ASsprite = [...];
   [ASMgr addChild:ASsprite z:255]; // NOTE: atlas sprite z order is 255

   ParticleSystem *emitter = [..];
   [self addChild:emitter z:128]; // NOTE emitter z order is 128

   In this scenario, it renders the particles on top of the atlas sprite. I don't understand why. Can someone explain how the z ordering of nodes is effected by AtlasSprites and the manager?

   So my question is,how can I render a particlesystem emitter BELOW some of my atlas sprites? Right now, I all do is either have the emitter draw on top of ALL atlas sprites or below ALL atlas sprites. No way to squeeze it in between?

   Any help is appreciated.

   Thanks,
   Jeff.

   Posted 2 years ago #
2. 

   shaunti
   Member

   I have found that it's the z order of the Manager that matters. Not the sprite as in when using regular Sprite class.

   I think the z order of the sprite in the manager only relates to it's children not the scene.

   Posted 2 years ago #
3. 

   Steve Oldmeadow
   Administrator

   Shaunti is correct. There is no way to intermix the z ordering of a particle system and an AtlasSpriteManager. Both do all their drawing in a batch. So in your example the particle system is always drawn on top of all the AtlasSprites because the z order of the AtlasSpriteManager is lower. The z order of the AtlasSprite is irrelevant except when compared against its siblings that have been added to the AtlasSpriteManager.

   If you don't have a large number of sprites consider just using plain old Sprites as this will allow you to intermix the z order.

   Posted 2 years ago #
4. 

   jeffam112368
   Member

   Thanks all, I suspected this was the case. Makes sense I suppose, tho was hoping there'd be a different solution.

   Thx, Jeff.

   Posted 2 years ago #

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