How to determine to which SpriteBatchNode the Sprites should be added

cocos2d-x C++
#1

I’m trying to figure out how the Sprite sheets work. I found in a tutorial this code :

CCSpriteBatchNode *backgroundBgNode;
    backgroundBgNode = [CCSpriteBatchNode batchNodeWithFile:@"background.pvr.ccz"];
    [self addChild:backgroundBgNode];
    [[CCSpriteFrameCache sharedSpriteFrameCache] addSpriteFramesWithFile:@"background.plist"];
    CCSprite *background = [CCSprite spriteWithSpriteFrameName:@"MuleDeer-ipadhd.png"];
    background.anchorPoint = ccp(0,0);
    [backgroundBgNode addChild:background];

Basically this code is clear but suppose that I have multiple spritesheets (pvr.czz files) and that every spritesheet has hundreds of different sprites. As suggested by the previous code I should add as a child every sprite to his corresponding CCSpriteBatchNode. Basically the problem is that the tool I use to generate spritesheets will almost randomly fit the sprites in different spritesheets if all the sprites do not fit in 1 spritesheet. What I have is a list of all the files (sprites) and I don’t know exactly to which spriteSheet they belong. So is there a way to get from code the right CCSpriteBatchNode to whom I should add my generating sprites ?

#2

A simpler way to use them is to use CCSpriteFrameCache::addSpriteFramesFromFile()

// Load the spritesheet
CCSpriteFrameCache::sharedSpriteFrameCache() -> addSpriteFramesFromFile( "spritesheet.plist" );

// Create a sprite from a texture inside the spritesheet
CCSprite * mySprite = CCSprite::createWithSpriteFrameName( "Hero-Walk-0" );

// Add to layer
this -> addChild( mySprite );
#3

I’m confused. Does this mean that I don’t have to load my textures (spritesheet. PVR.CZZ) with CCSpriteBatchNode and that the CCSpriteBatchnode should not be attached to the layer ? And how cocos2d knows about the existence of the pvc.czz file ?

#4

When you use CCSpriteFrameCache::addSpriteFramesFromFile(), the textures inside the file you specified will automatically be added to the cache.

#5

He is not asking about the cache, he is asking about SpriteBatchNode.

Claudio, you could try storing some map, where the key is a texture name and the value is a SpriteBatchNode. When you iterate over your sprites, you check its sprite sheet name by calling getTexture() and use it to search an appropriate SpriteBatchNode in the map.