cocos2d for iPhone

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

1. 

   Blue Ether
   Member

   It used to be possible to create a MenuItem using AtlasSprites in 0.8. I am assuming it is still possible with 0.99 especially since the thrust of .99 seemed to be trying to make sprite sheets easier to use?

   However, when I try to accomplish this by passing a [CCSprite spriteWithSpriteSheet:rect:] to a MenuItemSprite, it throws the exception 'If CCSprite is being rendered by CCSpriteSheet, CCSprite#draw SHOULD NOT be called'. I assume this is because the Sprite is getting added to the MenuItem? I've tried adding the sprites to the SpriteSheet before passing them to the MenuItem, but I still get the same exception thrown.

   How can I make something like this work? I don't see any examples.

   Posted 2 years ago #
2. 

   Blue Ether
   Member

   Can someone at least confirm whether it i possible to make a MenuItemSprite using SpriteSheet sprites or not using 0.99.2? Thanks.

   Posted 2 years ago #
3. 

   riq
   Key Master

   You are mixing 2 concepts:
   a) Batching: renderes all the sprites in 1 openGL call (the class is called SpriteSheet... mmm perhaps "BatchNode" is a better name).
   b) texture altas: lets you create "sub-sprites" from a big textures.

   In v0.8 Batching and SpriteSheets were associated.
   In v0.99 a new feature was added: You can use texture altas without batching. 99% of the times you'll want to use a texture atlas and batching. But there are cases where you don't want to do it....

   in v0.8 Menu supported a way to use batching, but in v0.99, that code was removed because it was a horrible hack.
   so in v0.99 you can still use a texture atlas (eg: using SpriteSheetFrameCache) but without batching.

   See test/MenuTest.m for a working example.

   UPDATE: CCSpriteSheet is called CCSpriteSheet and not CCBatchNode because it only supports CCSprites as children and it was previously called AtlasSpriteManager... but perhaps CCBatchNode is not a bad name after all.

   Posted 2 years ago #
4. 

   Blue Ether
   Member

   From your explanation I'm not sure you understood my question. I understand the purpose of SpriteSheets. I have a very busy main screen with a lot of stuff on it, and all of those things are in a SpriteSheet. I need a number of buttons on this screen, which I am using MenuItemSprite for. I'm trying to use SpriteSheet Sprites (i.e. batched sprites) as the sprites for the Menu. However, doing so gives me an error.

   Example:
   

   sprite1 = [CCSprite spriteWithSpriteSheet:spriteSheet rect:rect1];
   sprite2 = [CCSprite spriteWithSpriteSheet:spriteSheet rect:rect2];
   sprite3 = [CCSprite spriteWithSpriteSheet:spriteSheet rect:rect3];
   
   [spriteSheet addChild:sprite1 z:2];
   [spriteSheet addChild:sprite2 z:2];
   [spriteSheet addChild:sprite3 z:2];
   
   menuItem = [CCMenuItemSprite itemFromNormalSprite:sprite1 selectedSprite:sprite2 disabledSprite:sprite3 target:self selector:@selector(onClick:)];
   
   menu = [CCMenu menuWithItems:menuItem, nil];
   [menu setPosition:ccp(0,0)];
   [self addChild:menu z:10];

   Doesn't work. Is there a way to get this to work?

   Posted 2 years ago #
5. 

   Techy
   Member

   @Blue Ether are you adding the spriteSheet to the scene? If not, you need to...

   Posted 2 years ago #
6. 

   Blue Ether
   Member

   @Techy: Oh of course. Sorry, I was trying to keep my sample code simple and relevant but I did neglect to show the SpriteSheet setup. The sprite sheet is being used for the rest fo the game graphics and works fine. And again, the issue is not that the MenuItem does not appear but that a runtime exception is thrown:

   If CCSprite is being rendered by CCSpriteSheet, CCSprite#draw SHOULD NOT be called

   I presume this is because the CCSprite is getting added to the Menu and thereby also being removed from the sprite sheet? I'm not really sure.

   Posted 2 years ago #
7. 

   Techy
   Member

   Highly doubt this will work, but try to add the sprite to self.. so instead of:
   

   [spriteSheet addChild:sprite1 z:2];
   [spriteSheet addChild:sprite2 z:2];
   [spriteSheet addChild:sprite3 z:2];

   use
   

   [self addChild:sprite1 z:2];
   [self addChild:sprite2 z:2];
   [self addChild:sprite3 z:2];

   Posted 2 years ago #
8. 

   Techy
   Member

   (double post)

   Posted 2 years ago #
9. 

   rimshak
   Member

   Hi
   Searched on that today and worked on it for some hours.

   For now you cannot use SpriteBatchNodes for your menus items in the current version of Cocos2d (as of 7 decembre 2010)
   You can do it yourself by subclassing CCMenuItemSprite ...
   BUT: you will run into, screen coord system translation problems amongst other things.
   What I decided : I dont need super performance in menu pages so I decided not to develop this. And frankly who needs that kind of perf in menu screens ?
   (might depend on your game)

   Other things current menu items dont support well is animated sprites.
   For this you can find stuff around that supports that, I extended one of those classes
   and now I use SpriteFrames from spriteSheets in animated sprites in my menus.

   Posted 1 year ago #

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