Hi Len,

re:
> Tried your suggestion for clockwise/counterclockwise, but it doesn't work because I need
> to know clockwise or counterclockwise from the direction of travel, not relative to absolute
> cartesian space.

Can you please post a .3dm file with an example arc that doesn't work?

Could you maybe describe a little more about what coordinate system you need to use if it isn't global coordinates?

- Michael