1.首先定义一个 Snowflake 效果的方法
Snowflake.h
static void createParticleSnowRing(cocos2d::CCPoint position, Engine::String image ,int radia, CCNode* parentNode);
Snowflake.cpp
void ParticleEffects::createParticleSnowRing(cocos2d::CCPoint position, Engine::String image ,int radia, CCNode* parentNode) {
CCParticleSnow * particle = CCParticleSnow::node();
//自定义雪花图片
particle->setTexture(CCTextureCache::sharedTextureCache()->addImage(image.c_str()));
//粒子总数
particle->setTotalParticles(400);
//下雪时间秒
particle->setDuration(30);
//雪花开始大小
particle->setStartSize(10);
//雪花大小浮动
particle->setStartSizeVar(5);
//雪花结束大小
particle->setEndSize(5);
particle->setEndSizeVar(0);
//初始速度
particle->setSpeed(200);
particle->setSpeedVar(100);
//下降速度 y负数表示下落 x负数表示向西吹
particle->setGravity(ccp(-20,-70));
//每个雪花生命时间
particle->setLife(20.0f);
particle->setLifeVar(2.0f);
// particle->setPosition(ccp(240, 320));
//释放雪花速度 particle.emissionRate = particle.totalParticles/particle.life;
particle->setEmissionRate(400/4);
CCSize a = CCDirector::sharedDirector()->getWinSize();
//动画完成后自动从上层layer中移除粒子
particle->setAutoRemoveOnFinish(true);
//释放粒子位置 如果你想在调用的时候设置位置，那么可以注视下面的代码
parentNode->addChild(particle,3);
}
2.在你想调用的地方写下面的代码即可：
Engine::String image = Engine::StringUtil::format(“Snowflake%d.png”,arc4random() 7 + 1 );
CCSizes = CCDirector::sharedDirector()->getWinSize();
int x = s.width;
int y = s.height;
CCPoint position = ccp(arc4random() x,arc4random() % y);
this-> createExplodingRing(position, image, arc4random()%30+50, this);
3.如果你单独写一个类的话，这么调用
EffectsScene= newParticleEffects();
EffectsScene-> createExplodingRing(position, image, arc4random()%30+50, this);
4.直接用在用
CCParticleSnow* particle = CCParticleSnow::node();
particle->setTexture(CCTextureCache::sharedTextureCache()->addImage("snowflakes.png"));
particle->setTotalParticles(400);
particle->setDuration(30);
particle->setStartSize(10);
particle->setStartSizeVar(5);
particle->setEndSize(5);
particle->setEndSizeVar(0);
particle->setSpeed(200);
particle->setSpeedVar(100);
particle->setGravity(ccp(-20,-70));
particle->setLife(20.0f);
particle->setLifeVar(2.0f);
particle->setEmissionRate(400/4);
CCSizea = CCDirector::sharedDirector()->getWinSize();
particle->setAutoRemoveOnFinish(true);
particle->setPosition(CCPoint(a.width/2,a.height+10));
particle->setPosVar(ccp(a.width/2+50,0));
this->addChild(particle,20);
5.一些效果：
– CCParticleExplosion (爆炸粒子效果)
– CCParticleFireworks (烟花粒子效果)
– CCParticleFire (火焰粒子效果)
– CCParticleFlower (花束粒子效果)
– CCParticleGalaxy (星系粒子效果)
– CCParticleMeteor (流星粒子效果)
– CCParticleSpiral (漩涡粒子效果)
– CCParticleSnow (雪粒子效果)
– CCParticleSmoke (烟粒子效果)
– CCParticleSun (太阳粒子效果)
– CCParticleRain (雨粒子效果)
