Hi Brian, probably the easiest way is to use the BoundingBox command to generate a tight fit frame around the curves, it will then intersect the curves at the points you want I think.

You can also draw in a line or a construction line using Perp/Perp snap to get things like that too, see here for some examples:

http://moi3d.com/forum/index.php?webtag=MOI&msg=3042.14
http://moi3d.com/forum/index.php?webtag=MOI&msg=3042.13

- Michael

Hi Brian.

As usual, Michael beat me to it, but here's a video of how I would probably do it with MoI.

http://screencast.com/t/WIDzUu7Bxp

Cheers.


Martin (2).

EDIT: Just checked one of Michael's links and it seems much easier to do it his way :)

Thank you to everyone.
Excellent advice and tutorial.
Nice lead to "Jing" also.