[Mark Sir Link]

add emit modifier means the default particle settings defined previously are being modified.

add global modifier means all existing particles will be modified.

add local modifier will modify all of the particles individually.

so something like

emitter.addemitmodifier("impulse", 0.115, 0.115, "angle", "add", degtorad(5), degtorad(5));

would cause the angle the particle launches at to increase by 5 degrees every .115 seconds

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

would cause all existing particles to move -12.5 degrees every .05 seconds.

I'm assuming this winds up making a spiral?