Smoothing Curves

Hello all,

I've searched for the answer but am not finding the right clues. It is probably right in front of me but cannot find it.

I am using Grasshopper to build a regional intersection of two closed curves. Then filleting the corners of the resulting curve with a radius. I then rebuild the curves with a new number of control points. All good so far.

However I now need to run the normal Rhino "Smooth" command on the resulting curve a few times to remove the lumps and get a good result. How to do this seemingly simple step? Where can I go to find examples of this approach?

Assuming passing an id of the object to VBScript and accessing a Rhino Command, but lost.

Thanks for your time.

Shaw

Replies to This Discussion

Permalink Reply by David Rutten on May 20, 2011 at 5:27am

Hi Shaw,

smoothing means averaging the control points with the neighbours on both sides. There is no function that readily does this, you'll need to write it yourself. I don't think it will be very simple though, especially if you want to cater for periodic curves.

I did write a few smoothing algorithms for polylines (Rhino.Geometry.Polyline) so maybe you can use those, then convert the polyline points back into curve control-points.

David Rutten

david@mcneel.com

Turku, Finland

Permalink Reply by Giulio Piacentino on May 24, 2011 at 8:05am