No matter what I do this point is always sharp?
And here moved:
Hello- RemoveKnot
all but one knot at that location. Fully multiple (Degree number) knots will always be kinked.
-Pascal
Hmmm, I tried that, but it does not seem to work… Here is the curve. I type remove knot and click on it, and it stays the same.
I must be doing something wrong. Rebuild does help tho.
curve.3dm (130.6 KB)
Ah… a closed curve, so that is the seam point - I guess you do not get to remove knots there. If you move the seam (CrvSeam
) you can fix that location but it just moves the problem elsewhere.
MakePeriodic
will smooth the seam but will, in this case, change the shape of the curve pretty dramatically - InsertKnot
on either side of the seam first MidPoints=Yes.
-Pascal
Yeah - Nurbs - the AI curves are beziers strung together and very limited except maybe in this respect.
-Pascal
I think the problem is having a control point exactly on the seam. I moved the seam, then deleted the control point at the new seam, and everything smooth.
Sometimes I also need to remove the knot at the old seam location, but this time the command works just fine because it is no longer a seam.
I still think Rebuild is faster for this type of situations.
If you interpolate a sent of points using CurveThroughPts with Closed=Yes or InterpCrv with PersistentClose=Yes the result will be smooth.
This is not a limitation of NURBS in general but rather a particular method of creating a closed curve.