Michael, I'm trying to perform a simple Rail Extrude with a simple rectange and a 2-segment line
(I posted a camtasia here: http://www.willbelljr.net/public/MOI/CornerError/CornerError.html )

Performing a sweep keeps the profile shape the way I'd like but MOI doesn't handle the corner correctly (it's "cracked open" at the bend - In Rhino 2, performing the same operation works as expected?)

If I then attempt to perform a Rail Extrude, the corner is handled properly but the ending shape is incorrect.

I'd hate having to go back to Rhino to do things like this so I'm wondering how you'd create this?

Granted I can create more profiles and perhaps do a loft, but something as simple as this should work I'd imagine?

Any suggestions appreciated!

-Will

Work with two rails, for second rail helps ShellCommand

Okay, thanks Eddi - I'll try that!

I guess I was thrown off coming from Rhino and seeing how this works there...

I guess there's must be some additional programming required for it to handle the turn using a single rail like that?

Thanks!

-Will

Hi Will, yup it actually takes a fair amount of additional programming to handle the sharp turns. It involves extending the portions along each segment and then doing a mitered intersection to make the corner. Rhino has special code in it to handle this.

I started to work on it at one point, but it was taking quite a bit of time so I postponed it for a while, I don't think I will be able to squeeze it in for V1 but it will definitely be coming at some point after that.

For the 2 rail workaround method, you may sometimes want to put the rails on either side of the shape too - here is another thread with some info: http://moi3d.com/forum/index.php?webtag=MOI&msg=428.12

- Michael