Cocos2d-x

【Bean Run】

Bean & parkour



【Game link】



【Github】






【Particle System】

Particle effects system editor, which can switch effect images, parameters, and use special spark effect



【Github】






【Box 2D】

Game levels made with box 2D



【Github】



【Note】

Cocos2d-x only includes basic library, let’s see some of them

  1. Button event:
    register during initialization phase

    buttonEventHelloWorldScene.cpp
    1
    2
    3
    // Button
    c3btn.playbtn = dynamic_cast<Button*>(rootNode->getChildByName("PlayBtn"));//指定按鈕
    c3btn.playbtn->addTouchEventListener(CC_CALLBACK_2(HelloWorld::PlayBtnTouchEvent, this));

    implement button event

    buttonEventHelloWorldScene.cpp
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    void HelloWorld::PlayBtnTouchEvent(Ref *pSender, Widget::TouchEventType type)
    {
    	switch (type)
    	{
    		case Widget::TouchEventType::BEGAN:
    			log("Touch Down");
    			break;
    		case Widget::TouchEventType::MOVED:
    			log("Touch Move");
    			break;
    		case Widget::TouchEventType::ENDED:
    			log("Touch Up");
    			break;
    		case Widget::TouchEventType::CANCELED:
    			log("Touch Cancelled");
    			break;
    		default:
    			break;
    	}
    }

  2. Particle Effect: use in used list and free list to manage

    CParticleSystemCParticleSystem.h
    1
    2
    list<CParticle*> _FreeList;
    list<CParticle*> _InUsedList;

    initialize

    CParticleSystemCParticleSystem.cpp
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    void CParticleSystem::init(cocos2d::Layer &inlayer)
    {
    	_iFree = NUMBER_PARTICLES;
    	_iInUsed = 0;
    	_pParticles = new CParticle[NUMBER_PARTICLES]; 
    	 
    	SpriteFrameCache::getInstance()->addSpriteFramesWithFile("particletexture.plist");
    	for (int i = 0; i < NUMBER_PARTICLES; i++) {
    		_pParticles[i].setParticle("flare.png", inlayer);
    		_FreeList.push_front(&_pParticles[i]);
    	}
    }

    spawn particle and update list, check particle lifetime, and put the ones reach lifetime into free list

    CParticleSystemCParticleSystem.cpp
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    void CParticleSystem::doStep(float dt)
    {
    	CParticle *get;
    	list <CParticle *>::iterator it;
    	if (_bEmitterOn) { 
    		int n = (int)(_fElpasedTime * _iNumParticles); 
    		if (n > _iGenParticles) {
    			for (int i = 0; i < n - _iGenParticles; i++) {
    				
    				if (_iFree != 0) {
    					if (_iEmitterType == 0) {
    						get = _FreeList.front();
    						_FreeList.pop_front();
    						_InUsedList.push_front(get);
    						_iFree--; _iInUsed++;
    					}						
    				}
    			}
    			_iGenParticles = n; 
    		}			
    	}
    	
    	if (_iInUsed != 0) {
    		for (it = _InUsedList.begin(); it != _InUsedList.end(); ) {
    			if ((*it)->doStep(dt)) {							 
    				_FreeList.push_front((*it));
    				it = _InUsedList.erase(it); 
    				_iFree++; _iInUsed--;
    			}
    			else it++;
    		}
    	}
    }

  3. Joint: set multiple objects and bind them together

    jointJointScene.cpp
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    auto circleSprite = _csbRoot->getChildByName("circle01_pul");

    Point locA = circleSprite->getPosition();
    Size size = circleSprite->getContentSize();
    float scale = circleSprite->getScale();
    b2CircleShape circleShape;
    circleShape.m_radius = size.width*0.5f*scale / PTM_RATIO;
    b2BodyDef bodyDef;
    bodyDef.type = b2_dynamicBody;
    bodyDef.position.Set(locA.x / PTM_RATIO, locA.y / PTM_RATIO);
    bodyDef.userData = circleSprite;
    b2Body* bodyA = _b2World->CreateBody(&bodyDef);
    b2FixtureDef fixtureDef;
    fixtureDef.shape = &circleShape;
    fixtureDef.density = 10.0f;
    fixtureDef.friction = 0.2f;
    bodyA->CreateFixture(&fixtureDef);

    b2PulleyJointDef JointDef;
    JointDef.Initialize(bodyA, bodyB,
    	b2Vec2( locA.x / PTM_RATIO, (locA.y +150) / PTM_RATIO),
    	b2Vec2( locB.x / PTM_RATIO, (locB.y +150) / PTM_RATIO),
    	bodyA->GetWorldCenter(),
    	bodyB->GetWorldCenter(),
    	1);
    _b2World->CreateJoint(&JointDef);
code random stuff cocos
prev:Eat Honey next:OpenGL