Hey all - I'm trying to calculate the angle between a vector A and the X vector. The current vector angle component gives either the angle from 0-Pi or the reflex angle (from Pi-2Pi), but either way, two angles that are mirror images of one another across the X-axis return the same result. I need them to return different values; either negative if below the X axis (Blue) or 2Pi-angle (Green) if below. I came up with a sort of messy work around that takes the Y component of angle A, and gives me a boolean value of true if negative, which I can then use to make the angle value negative. http://grasshopper3d.googlegroups.com/web/diagram.gif
Any ideas on a better way to do this? Thanks, Andrew
