Hello, in the "throw" tool, the angle of rebound is calculate with this function:

var angle = velocity.getDirectedAngle(tangent);

I want to know what the "getDirectedAngle" function does. I searched it in the scriptographer core but I didn't find it, so I think is an illustrator function...

In my script I work with velocity, I have the point of rebound, but what is the calcul for the good angle of rebound?