I have a planar, non-self-intersecting, closed polyline curve.
When I use the Offset command in Rhino 7 or Rhino 6, it doesn’t work – I just get a microscopic polyline with two segments. This happens whichever side I offset, and even if I use a very small offset distance.
ProblemCurve.3dm (67.2 KB)
I originally created the curve by projecting a line onto a solid mesh, and I have had the same result with a few other curves created the same way. I used SetPt, Convert and CurveBoolean to make sure the curve is clean and flat, but none of that helped.
I tried using OffsetMultiple instead, and that caused Rhino 7 Mac to become unresponsive (I got a pinwheel cursor for >5min).
I understand that sometimes Offset needs a bit of help, but I can’t figure out what is problematic about this curve – as far as I can tell it is as simple as it looks!