Particle Effects

[callimuc]

Hey there. I was just testing around with Particle Effects and I guess its not that hard but still got this question:

What exactly do this commands do and when/for what/... do I use them?
(These are just out of a Particle Effect script I found)

PHP Code:

emitter.addemitmodifier("impulse", 0.115, 0.115, "angle", "add", degtorad(5), degtorad(5));
emitter.addglobalmodifier("impulse", 0.05, 0.05, "angle", "add", degtorad(-12.5), degtorad(-12.5)); 


And I guess there is also stuff like emitter.removemitmodifier() and so on. Could someone explain how all that works?