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cocos2d-x重力感应

2013-11-30 20:05 393 查看

一、保证pos的位置在min,max内

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#define FIX_POS(_pos, _min, _max) \  
    if (_pos < _min)        \  
    _pos = _min;        \  
else if (_pos > _max)   \  
    _pos = _max;        \  

#define FIX_POS(_pos, _min, _max) \
if (_pos < _min)        \
_pos = _min;        \
else if (_pos > _max)   \
_pos = _max;        \
用法，保证一个CCSprite在屏幕内。

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FIX_POS(ptNext.x, (VisibleRect::left().x+ballSize.width / 2.0), (VisibleRect::right().x - ballSize.width / 2.0));  
FIX_POS(ptNext.y, (VisibleRect::bottom().y+ballSize.height / 2.0), (VisibleRect::top().y - ballSize.height / 2.0));  

FIX_POS(ptNext.x, (VisibleRect::left().x+ballSize.width / 2.0), (VisibleRect::right().x - ballSize.width / 2.0));
FIX_POS(ptNext.y, (VisibleRect::bottom().y+ballSize.height / 2.0), (VisibleRect::top().y - ballSize.height / 2.0));


二、设置CCLayer层的onEnter里面设置重力感应。设置了重力感应。如果是PC，没有重力感应，就是用方向键控制。

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void xxxLayer::onEnter()  
{  
    CCLayer::onEnter();  
    setAccelerometerEnabled(true);  
}  

void xxxLayer::onEnter()
{
CCLayer::onEnter();
setAccelerometerEnabled(true);
}


当重力感应方向变化时候，会调用

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void AccelerometerTest::didAccelerate(CCAcceleration* pAccelerationValue)  
{  
    CCPoint ptNow  = m_pBall->getPosition();  
    CCPoint ptTemp = pDir->convertToUI(ptNow);  
  
    ptTemp.x += pAccelerationValue->x * 9.81f;  
    ptTemp.y -= pAccelerationValue->y * 9.81f;  
  
    CCPoint ptNext = pDir->convertToGL(ptTemp);  
}  

void AccelerometerTest::didAccelerate(CCAcceleration* pAccelerationValue)
{
    CCPoint ptNow  = m_pBall->getPosition();
    CCPoint ptTemp = pDir->convertToUI(ptNow);

    ptTemp.x += pAccelerationValue->x * 9.81f;
    ptTemp.y -= pAccelerationValue->y * 9.81f;

    CCPoint ptNext = pDir->convertToGL(ptTemp);
}


pAccelerationValue包含x,y,z三个方向的重力值。

三、removeChild删除子控件不奔溃的处理办法。

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void CrashTest::onEnter()  
{  
    ActionManagerTest::onEnter();  
  
    CCSprite* child = CCSprite::create(s_pPathGrossini);  
    child->setPosition( VisibleRect::center() );  
    addChild(child, 1);  
  
    //Sum of all action's duration is 1.5 second.  
    child->runAction(CCRotateBy::create(1.5f, 90));  
    child->runAction(CCSequence::create(  
                                            CCDelayTime::create(1.4f),  
                                            CCFadeOut::create(1.1f),  
                                            NULL)  
                    );  
      
    //After 1.5 second, self will be removed.  
    runAction( CCSequence::create(  
                                    CCDelayTime::create(1.4f),  
                                    CCCallFunc::create(this, callfunc_selector(CrashTest::removeThis)),  
                                    NULL)  
             );  
}  
  
void CrashTest::removeThis()  
{  
    m_pParent->removeChild(this, true);  
}  

void CrashTest::onEnter()
{
ActionManagerTest::onEnter();

CCSprite* child = CCSprite::create(s_pPathGrossini);
child->setPosition( VisibleRect::center() );
addChild(child, 1);

//Sum of all action's duration is 1.5 second.
child->runAction(CCRotateBy::create(1.5f, 90));
child->runAction(CCSequence::create(
CCDelayTime::create(1.4f),
CCFadeOut::create(1.1f),
NULL)
);

//After 1.5 second, self will be removed.
runAction( CCSequence::create(
CCDelayTime::create(1.4f),
CCCallFunc::create(this, callfunc_selector(CrashTest::removeThis)),
NULL)
);
}

void CrashTest::removeThis()
{
m_pParent->removeChild(this, true);
}
四、addAction最后一个参数设为ture暂停动作，然后resumeTarget恢复动作，3秒后执行移动动作。

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void PauseTest::onEnter()  
{  
    //  
    // This test MUST be done in 'onEnter' and not on 'init'  
    // otherwise the paused action will be resumed at 'onEnter' time  
    //  
    ActionManagerTest::onEnter();  
      
  
    CCLabelTTF* l = CCLabelTTF::create("After 5 seconds grossini should move", "Thonburi", 16);  
    addChild(l);  
    l->setPosition( ccp(VisibleRect::center().x, VisibleRect::top().y-75) );  
      
      
    //  
    // Also, this test MUST be done, after [super onEnter]  
    //  
    CCSprite* grossini = CCSprite::create(s_pPathGrossini);  
    addChild(grossini, 0, kTagGrossini);  
    grossini->setPosition(VisibleRect::center() );  
      
    CCAction* action = CCMoveBy::create(1, ccp(150,0));  
  
    CCDirector* pDirector = CCDirector::sharedDirector();  
    pDirector->getActionManager()->addAction(action, grossini, true);  
  
    schedule( schedule_selector(PauseTest::unpause), 3);   
}  
  
void PauseTest::unpause(float dt)  
{  
    unschedule( schedule_selector(PauseTest::unpause) );  
    CCNode* node = getChildByTag( kTagGrossini );  
    CCDirector* pDirector = CCDirector::sharedDirector();  
    pDirector->getActionManager()->resumeTarget(node);  
}  

void PauseTest::onEnter()
{
//
// This test MUST be done in 'onEnter' and not on 'init'
// otherwise the paused action will be resumed at 'onEnter' time
//
ActionManagerTest::onEnter();

CCLabelTTF* l = CCLabelTTF::create("After 5 seconds grossini should move", "Thonburi", 16);
addChild(l);
l->setPosition( ccp(VisibleRect::center().x, VisibleRect::top().y-75) );

//
// Also, this test MUST be done, after [super onEnter]
//
CCSprite* grossini = CCSprite::create(s_pPathGrossini);
addChild(grossini, 0, kTagGrossini);
grossini->setPosition(VisibleRect::center() );

CCAction* action = CCMoveBy::create(1, ccp(150,0));

CCDirector* pDirector = CCDirector::sharedDirector();
pDirector->getActionManager()->addAction(action, grossini, true);

schedule( schedule_selector(PauseTest::unpause), 3);
}

void PauseTest::unpause(float dt)
{
unschedule( schedule_selector(PauseTest::unpause) );
CCNode* node = getChildByTag( kTagGrossini );
CCDirector* pDirector = CCDirector::sharedDirector();
pDirector->getActionManager()->resumeTarget(node);
}


五、停止动作stopActionByTag。特别注意的是动作和CCSprite加了标志，比如setTag(kTagSequence)方便以后查找。下面代码是先用getChildByTab(kTagGrossini)获取节点。然后stopActionByTay(kTagSequence);

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void RemoveTest::onEnter()  
{  
    ActionManagerTest::onEnter();  
  
    CCMoveBy* pMove = CCMoveBy::create(2, ccp(200, 0));  
    CCCallFunc* pCallback = CCCallFunc::create(this, callfunc_selector(RemoveTest::stopAction));  
    CCActionInterval* pSequence = CCSequence::create(pMove, pCallback, NULL);  
    pSequence->setTag(kTagSequence);  
  
    CCSprite* pChild = CCSprite::create(s_pPathGrossini);  
    pChild->setPosition( VisibleRect::center() );  
  
    addChild(pChild, 1, kTagGrossini);  
    pChild->runAction(pSequence);  
}  
  
void RemoveTest::stopAction()  
{  
    CCNode* pSprite = getChildByTag(kTagGrossini);  
    pSprite->stopActionByTag(kTagSequence);  
}  

void RemoveTest::onEnter()
{
ActionManagerTest::onEnter();

CCMoveBy* pMove = CCMoveBy::create(2, ccp(200, 0));
CCCallFunc* pCallback = CCCallFunc::create(this, callfunc_selector(RemoveTest::stopAction));
CCActionInterval* pSequence = CCSequence::create(pMove, pCallback, NULL);
pSequence->setTag(kTagSequence);

CCSprite* pChild = CCSprite::create(s_pPathGrossini);
pChild->setPosition( VisibleRect::center() );

addChild(pChild, 1, kTagGrossini);
pChild->runAction(pSequence);
}

void RemoveTest::stopAction()
{
CCNode* pSprite = getChildByTag(kTagGrossini);
pSprite->stopActionByTag(kTagSequence);
}
六、先暂停动作，然后pauseTager，然后runAction一个动作，这样resumeTager的话，就可以同时执行2个动作了。

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void ResumeTest::onEnter()  
{  
    ActionManagerTest::onEnter();  
  
    CCSprite* pGrossini = CCSprite::create(s_pPathGrossini);  
    addChild(pGrossini, 0, kTagGrossini);  
    pGrossini->setPosition(VisibleRect::center());  
  
    pGrossini->runAction(CCScaleBy::create(2, 2));  
  
    CCDirector* pDirector = CCDirector::sharedDirector();  
    pDirector->getActionManager()->pauseTarget(pGrossini);  
    pGrossini->runAction(CCRotateBy::create(2, 360));  
  
    this->schedule(schedule_selector(ResumeTest::resumeGrossini), 3.0f);  
}  
  
void ResumeTest::resumeGrossini(float time)  
{  
    this->unschedule(schedule_selector(ResumeTest::resumeGrossini));  
  
    CCNode* pGrossini = getChildByTag(kTagGrossini);  
    CCDirector* pDirector = CCDirector::sharedDirector();  
    pDirector->getActionManager()->resumeTarget(pGrossini);  
}  

void ResumeTest::onEnter()
{
ActionManagerTest::onEnter();

CCSprite* pGrossini = CCSprite::create(s_pPathGrossini);
addChild(pGrossini, 0, kTagGrossini);
pGrossini->setPosition(VisibleRect::center());

pGrossini->runAction(CCScaleBy::create(2, 2));

CCDirector* pDirector = CCDirector::sharedDirector();
pDirector->getActionManager()->pauseTarget(pGrossini);
pGrossini->runAction(CCRotateBy::create(2, 360));

this->schedule(schedule_selector(ResumeTest::resumeGrossini), 3.0f);
}

void ResumeTest::resumeGrossini(float time)
{
this->unschedule(schedule_selector(ResumeTest::resumeGrossini));

CCNode* pGrossini = getChildByTag(kTagGrossini);
CCDirector* pDirector = CCDirector::sharedDirector();
pDirector->getActionManager()->resumeTarget(pGrossini);
}


转自：http://blog.csdn.net/hayyoung/article/details/8804909
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