CCSpriteBatchNode assert happening when I actually don't use CCSpriteBatchNode

cocos2d-x C++
#1

I’m on my way with porting SneakyInput Joystick lib to Cocos2d-x and I’ve basically managed to finish this work, but sometimes I’m getting strange CCAssert error:

CCNode::void CCSprite::addChild(CCNode *pChild, int zOrder, int tag)
{
 // ...
 CCAssert( pChildSprite, "CCSprite only supports CCSprites as children when using CCSpriteBatchNode"); // SIGABRT here
 // ...
}

On my side calling of CCNode’s ‘addChild’ method happening here:

void SneakyButtonSkinnedBase::setButton(SneakyButton *pButton)
{
 if (button) {
    if (button->getParent()) {
        button->getParent()->removeChild(button, true); 
    }
    button->release();
 }

 pButton->retain();
 button = pButton;

 if (pButton) {
     this->addChild(button, 4); /* !!! crash here !!! */
     if (defaultSprite) {
         button->setRadius(defaultSprite->boundingBox().size.width/2);
     }
 }

/* Original iOS code */     

//    if(button){
//      if(button.parent)
//          [button.parent removeChild:button cleanup:YES];
//      [button release];
//  }
//  button = [aButton retain];
//  if(aButton){
//      [self addChild:button z:4];
//      if(defaultSprite)
//          [button setRadius:defaultSprite.contentSize.width/2];
//  }
}

I have absolutely no idea what happening: I have no any references to BatchNode class in my project (and in library too). Moreover, error appearing randomly (~7-8 times from 10 attempts). I wonder - it is a hided logic of framework? It performs some conversion when I’m trying to add several similar sprites to the layer (four navigation buttons)? So why does it work on cocos2-d without errors in this case?

#2

Please check or CCSprite and CCBatchNode have correctly atlas.
I had this same error (but do not know how i corrected)
can also try to use instead addChild appendChild.

#3

Misha Philypchuk wrote:

Please check or CCSprite and CCBatchNode have correctly atlas.
I had this same error (but do not know how i corrected)
can also try to use instead addChild appendChild.

Thank you for your post. I’m not using atlas in my project. And I can’t find ‘appendChild’ method, looks like CCSprite class doesn’t contain it.

#4

this->addChild(button, 4); /* ! crash here ! */

It suggests that ‘this’ is a CCSprite and button is a CCSprite but they are not using CCSpriteBatchNode (or not the same CCSpriteBatchNode).

What is ‘this’ and button when the crash occurs?

#5

Adam Reed wrote:

this->addChild(button, 4); /* ! crash here ! */
>
It suggests that ‘this’ is a CCSprite and button is a CCSprite but they are not using CCSpriteBatchNode (or not the same CCSpriteBatchNode).
>
What is ‘this’ and button when the crash occurs?

‘this’ is object of SneakyButtonSkinnedBase class (extends CCSprte), ‘button’ is SneakyButton object (extends CCNode).

#6

Does your SneakyButton (CCNode based) object contain any CSprite objects?

#7

Adam Reed wrote:

Does your SneakyButton (CCNode based) object contain any CSprite objects?
No, it doesn’t. [[https://github.com/sneakyness/SneakyInput/blob/master/Classes/SneakyButton.h]]

#8

I was thinking more along the lines of adding CCSprite objects to your SneakyButton object.

Do you do button->addChild(CCSprite object) at any point before adding the CCNode to your Sprite?

#9

Adam Reed wrote:

I was thinking more along the lines of adding CCSprite objects to your SneakyButton object.
>
Do you do button->addChild(CCSprite object) at any point before adding the CCNode to your Sprite?

I was tried to link this problem with childs count by adding this line before crashing line:

cocos2d::CCLog("Childs count: %d", button->getChildrenCount());

and whether or not the crash appears after this CCLog, result was the same: button has 0 childes.

After that I went deeper to CCSPrite class and set a new breakpoint:

void CCSprite::addChild(CCNode *pChild, int zOrder, int tag)
{
    CCAssert(pChild != NULL, "Argument must be non-NULL");

    if (m_pobBatchNode) // breakpoint here
    {
        CCSprite* pChildSprite = dynamic_cast(pChild);
        CCAssert( pChildSprite, "CCSprite only supports CCSprites as children when using CCSpriteBatchNode");
        CCAssert(pChildSprite->getTexture()->getName() == m_pobTextureAtlas->getTexture()->getName(), "");
        //put it in descendants array of batch node
        m_pobBatchNode->appendChild(pChildSprite);

        if (!m_bReorderChildDirty)
        {
            setReorderChildDirtyRecursively();
        }
    }
    //CCNode already sets isReorderChildDirty_ so this needs to be after batchNode check
    CCNode::addChild(pChild, zOrder, tag);
    m_bHasChildren = true;
}

Look to the outer ‘if’ checking: I’ve noticed that crash will appear only when m_pobBatchNode != NULL (we trying to append child to BatchNode as result), else code works fine (CCNode::addChild(pChild, zOrder, tag) is calling). So the only thing what I should to decide is WHY and WHERE m_pobBatchNode initialized.

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