Hi Sonar Systems,
I need help with implementing and controlling animation using ParticleSystem.
This is the code I am using to create an effect that creates stars on the screen when u simply touch the screen and move your finger around
myParticleSystem = ParticleFlower::create();
myParticleSystem->setTotalParticles(200);
this->addChild(myParticleSystem, 5);
myParticleSystem->setTangentialAccel(10.0);
myParticleSystem->setLife(3.0);
myParticleSystem->setPosition(location);
myParticleSystem->setTexture(Director::getInstance()->getTextureCache()->addImage("common/star.png"));

then in touchMoved i simply write this code:
Point location = touch->getLocation();
myParticleSystem->setPosition(location);

So everything works perfect this way.
I get a beautiful star animation that makes you feel that stars are being released as you move your hand around on the screen.

THE PROBLEM:
In order to get the same effect on Full HD devices, I only add one extra line.
Adding this line makes the stars look bigger on Full HD screens. If I dont add this line, the stars are very tiny and i dont get the problem that i am about to mention. 
myParticleSystem->setScale(2.0);  

So when I add the above line, the stars become big and clearly visible.
But then the ParticleSystem animation behaves in a very weird way.
Instead of naturally following the opposite direction, the stars act in a mechanical way.

I have sent you videos of the same at support@sonarsystems.co.uk 

I need the scale 2.0 part (the device i used for capturing video was not full HD)
Please check them out and help me with this.
I have no idea why this is happening.
  
Thanks