Curve.ClosestPoints

Rhino Developer
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1

Hi,

Is there an equivalent to Curve.ClosestPoints in OpenNurbs or Rhino C++ SDK ?

This is the .net function:
https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_Curve_ClosestPoints.htm

2

I depends on the curve type, I think. Lines, polylines, circles, arc, and such have closest point search methods. What kind of curve type are looking to find the closest point for?

3

Hi @Petras_Vestartas,

The Curve.ClosestPoints method eventually calls RhinoGetClosestPoint. See rhinoSdkUtilities.h for details.

– Dale

1 Like
4

Thank you. I assume that such intersection / search method are not included in OpenNurbs just basic geometry types and line/plane intersections? I tried to search something similar for curves but nothing is here. I ll try to use rhino sdk.

5

It is the case when you have two nurbs curves and you would like to find closest points in between them. Polylines would work as well.

6

For two polylines, it’s simpler than I imagine it being for Nurbs curves.

https://metacpan.org/release/SALVA/Math-Vector-Real-Polyline-0.01/source/lib/Math/Vector/Real/Polyline.pm#L74

If I remember correctly, there should also be an implementation in CGAL.