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POExplaination of RayWenderlich's CCParallaxNodeExtras.h
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2013-06-30T09:51:24.683
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2013-07-03T05:34:04.407
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I was going through the <a href="http://www.raywenderlich.com/33752/cocos2d-x-tutorial-for-ios-and-android-space-game" rel="nofollow">Ray Wenderlich's Space Game</a> tutorial for android. Great Tutorial. I am an intermediate C++ programmer and I am trying to understand what's happening inside here. Just to understand I've rewritten it. Removing macros. <pre><code>class CCPointObject: CCObject { protected: CCPoint m_tRatio; CCPoint m_tOffset; CCNode *m_pChild; public: virtual CCPoint getRatio() const { CCLog("getRatio_CALLED"); return m_tRatio; } virtual void setRatio(CCPoint newRatio) { CCLog("setRatio_CALLED"); m_tRatio = newRatio; } . .. ... // similarly getChild/setChild/getOffset/setOffset is defined. The code works perfectly fine. }; void CCParallaxNodeExtras::incrementOffset(CCPoint offset,CCNode* node) { for( unsigned int i = 0; i < m_pParallaxArray->num; i++) { CCPointObject *point = (CCPointObject *)m_pParallaxArray->arr[i]; CCNode * curNode = point->getChild(); if( curNode->isEqual(node) ) { point->setOffset( ccpAdd(point->getOffset(), offset) ); break; } } } </code></pre> MY DOUBTS: <ul> <li>when point is initialized (by casting CCObject* to CCPointObject*), how m_tOffset, m_tRatio and m_pChild is initialized to actual values of that Object's offset and ratio ?</li> <li>I've given CCLogs in setOffset/getOffset functions of CCPointObject, but they have been never called so which setOffset/getOffset is called ? As CCPointObject is inherited from CCObject so I thought, might be CCObject's setOffset/getOffset is being called but, as i checked, there is no setOffset/getOffset declared in CCObject.</li> <li>I looked in to ccParallaxNode.h and its there, //array that holds the offset / ratio of the children CC_SYNTHESIZE(struct _ccArray *, m_pParallaxArray, ParallaxArray) and _ccArray has CCObject** that means Array of CCObjects and CCObject does not have any variable as m_tOffset/m_tRatio or m_pChild so, where actually the offset/ratio is stored ?</li> </ul> These doubts are driving me nuts. Please help !!
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<android><game-engine><cocos2d-x><ray>
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Explaination of RayWenderlich's CCParallaxNodeExtras.h
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