Curve offset trouble with negative value

Will_Wang · May 25, 2021, 1:38pm

bad result seen in screenshot
same thing if I try RhinoCommon in a C# component
work-arounds?

akilli · May 25, 2021, 1:46pm

Looks like you’ve got a duplicate point, at least within tolerance.

Will_Wang · May 25, 2021, 2:03pm

thanks for point that out
i do have a pair very close but they are 0.003 units apart, over the tolerance that is set to 0.001

fyi i did an offset command on the baked curve in rhino with 0.1 and it worked just fine

akilli · May 25, 2021, 2:07pm

Well, I thought maybe it was inadvertent because they are so close. If you eliminate one of them, the offset works, so perhaps it fails because of this? Clipper seems to work.

anon39580149 · May 25, 2021, 2:29pm

rs.OffsetCurve work fine

Baris · May 25, 2021, 3:20pm

It has to do with the plane and how the curve lies on it, that’s also why it works on the p thing.
If you flip the curve or the plane it works. Not sure if this is a bug.

Will_Wang · May 25, 2021, 3:30pm

Did a little forensics. FWIW, the rhinoscriptsyntax wrapper you mentioned calls this, where as my attempt with a C# component called this.
Once I switched to the former, it seemed to have bypassed my problem.
Maybe McNeel can one day resolve the difference between the them.