How to change the angle of the Particle Meteor

cocos2d-x C++
#1

I’ve created a meteor particle using the function below. So far I have successfully made it appear on the screen and it follows my hero’s movement. Now I’m having trouble changine the “angle” of the “meteor particle”. no matter what float value i place inside “_comet->setAngle(175.45f);” still the meteor wont change angles. Help please?

void HelloWorld::createParticles() {
// CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();

 _comet = new CCParticleSystemQuad();
 _comet = CCParticleMeteor::create();
 _comet->setPosition(ccp(_balloon->getPositionX() - (_balloon->boundingBox().size.width / 2),
                         _balloon->getPositionY()));
_comet->setAngle(175.45f);
this->addChild(_comet, kForeground);

_comet->autorelease();

}

#2

I believe setAnglechanges the angle of each particle instead of the whole system. Since CCParticleSystemQuad inherits from CCNode (eventually), have you tried:

_comet->setRotation(175.45f);
#3

I also came across this problem.

#4

Will there is a problem with particle emiter rotation handling, I suggest you modify the ParticleSystem header file, and add this :

float _emiterRotation;
setEmiterRotation(float val){ 
_emiterRotation = val;
}
float getEmiterRotation(){
return _emiterRotation;
}

and modify the cpp file either :

//You will find this in the initParticle(tParticle* particle) method
float a = CC_DEGREES_TO_RADIANS( (_angle + _angleVar * CCRANDOM_MINUS1_1()) + _emiterRotation );
//Modify the constructor two
ParticleSystem::ParticleSystem()
:_emiterRotation(0),
 ..............

This will work only if you move your particle using speed factor and not gravity.
Honestly there is lots to be said about particle movement, you will figure out what I mean later…

#5

thanks, the “setRotation” works! buhahahaha :smiley: