I downloaded your ruby and everything seemed to work OK, but when I filled in the parameters: length (10'), angle (45), plane (red-green) and clicked "OK", there was no line. What could I be doing wrong?
I am attaching a screen shot (with different parameters) in a separate post. I tried posting this once but it didn't seem to work (forgive me if it comes up twice) and maybe the screen shot was the problem.
Huck

