Curve Tangent

[DavidLeon (David Andres Leon)]

Perhaps you could try this approach:

How to find the tangent point on a curve

Not sure if this helps but here is how you can do it in python. I wrote this for a specific case so it may not take into account your specific needs (eg it does not check for multiple tangents). import rhinoscriptsyntax as rs import Rhino def TangentLinePtToCurve(Point,Curve): #Create small circle around pt PtCircle=rs.AddCircle(EndPt,0.001) #get curve domains CurveParam=rs.CurveDomain(Curve)[0] PtCircleParam=rs.CurveDomain(PtCircle)[0] #transform into rhino geometry da…