cocos2d-x实现node圆弧运动 (附源代码)

概述    纪录下自己写的东西！ 头文件： /*圆弧动作类*/class CCArcBy : public cocos2d::CCActionInterval{public: //初始化圆弧动作类 //duration: 动作类的持续时间 //ptCenter: 圆弧的中心点 //deltaAngle: 弧度的变化量，用正负来表示逆时针或顺时针方向 bool initWithDur

纪录下自己写的东西！

头文件：

/*圆弧动作类*/class CCArcBy : public cocos2d::CCActionInterval{public:	//初始化圆弧动作类	//duration: 动作类的持续时间	//ptCenter: 圆弧的中心点	//deltaAngle: 弧度的变化量，用正负来表示逆时针或顺时针方向	bool initWithDuration(float duration,const cocos2d::CCPoint& ptCenter,float deltaAngle);		virtual CCObject* copyWithZone(cocos2d::CCZone* pZone);	virtual voID startWithTarget(cocos2d::CCNode *pTarget);	virtual CCActionInterval* reverse(voID);	virtual voID update(float time);public:	static CCArcBy* create(float duration,float deltaAngle);protected:	cocos2d::CCPoint m_startposition;	cocos2d::CCPoint m_prevIoUsposition;	cocos2d::CCPoint m_ptCenter;	float            m_fAngleDelta;};

实现文件：

CCArcBy* CCArcBy::create(float duration,const CCPoint& ptCenter,float deltaAngle){	CCArcBy* pRet= new CCArcBy();	pRet->initWithDuration(duration,ptCenter,deltaAngle);	pRet->autorelease();	return pRet;}bool CCArcBy::initWithDuration(float duration,float deltaAngle){	if(CCActionInterval::initWithDuration(duration))	{		m_ptCenter= ptCenter;		m_fAngleDelta= deltaAngle;		return true;	}	return false;}CCObject* CCArcBy::copyWithZone(CCZone* pZone){	CCZone* pNewZone = NulL;	CCArcBy* pcopy = NulL;	if(pZone && pZone->m_pcopyObject) 	{		//in case of being called at sub class		pcopy = (CCArcBy*)(pZone->m_pcopyObject);	}	else	{		pcopy = new CCArcBy();		pZone = pNewZone = new CCZone(pcopy);	}	CCActionInterval::copyWithZone(pZone);	pcopy->initWithDuration(m_fDuration,m_ptCenter,m_fAngleDelta);	CC_SAFE_DELETE(pNewZone);	return pcopy;}voID CCArcBy::startWithTarget(CCNode *pTarget){	CCActionInterval::startWithTarget(pTarget);	m_prevIoUsposition = m_startposition = pTarget->getposition();}CCActionInterval* CCArcBy::reverse(){	return CCArcBy::create(m_fDuration,-m_fAngleDelta);}voID CCArcBy::update(float time){	cclog("%f",time);	if(m_pTarget)	{#if CC_ENABLE_STACKABLE_ACTIONS		CCPoint currentPos = m_pTarget->getposition();		CCPoint diff = ccpsub(currentPos,m_prevIoUsposition);		m_startposition = ccpAdd( m_startposition,diff);		CCPoint newPos =  m_ptCenter + ccpRotateByAngle(m_startposition-m_ptCenter,CCPointZero,m_fAngleDelta*time);		m_pTarget->setposition(newPos);		m_pTarget->setRotation(-CC_radians_TO_degrees(m_fAngleDelta*time));		m_prevIoUsposition = newPos;#else		m_pTarget->setposition(m_ptCenter + ccpRotateByAngle(m_startposition-m_ptCenter,m_fAngleDelta*time));#endif  // CC_ENABLE_STACKABLE_ACTIONS	}}

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