MatchCurveStructure.py

import Rhino
import rhinoscriptsyntax as rs
import scriptcontext as sc

"""
redistributes one curve along another by closest points.
"""

def MatchCurveStructure():

    id1 = rs.GetObject("Select the reference curve", 4, preselect=True)
    if not id1: return
    
    
    id2 = rs.GetObject("Select the curve to change", 4)
    if not id2: return
    
    if not rs.CurveDirectionsMatch(id1, id2):
        rs.ReverseCurve(id2)
        
    crv1Geo = rs.coercegeometry (id1)
    crv2Geo = rs.coercegeometry (id2)
    
    if not crv1Geo: return
    
    if  isinstance(crv1Geo, Rhino.Geometry.BrepEdge):
        crv1Geo = crv1Geo.EdgeCurve

    targs = [crv2Geo.PointAtStart]

    for n  in range(1,crv1Geo.GrevillePoints().Count -1):
        targs.append(  crv2Geo.PointAt(crv2Geo.ClosestPoint(crv1Geo.GrevillePoints()[n])[1]) )
        
        
    targs.append(crv2Geo.PointAtEnd)

    #targs = [crv2Geo.PointAt(crv2Geo.ClosestPoint(pt)[1]) for pt in crv1Geo.GrevillePoints()]
    
    if crv1Geo.SetGrevillePoints(targs):
        newId = sc.doc.Objects.AddCurve(crv1Geo)
        if newId: rs.UnselectAllObjects()
        rs.SelectObject(newId)

if __name__ == "__main__":
    MatchCurveStructure()