Gh Python - Join Curve Segments

@luisseyfer wrote:

Hello,

I am trying to create a Component
wich snaps the ends of an open curve in the middle of the endpoints to close it.
Since the curve is an assambly of various bended segments wich has some sharp edges I explode it first.
Then I rebuild the start- and endsegments.
Now I want to rejoin everything, but get an error.

import rhinoscriptsyntax as rs

##############################################
##############################################

# Ensure variable is defined
try:
    tol
except NameError:
    tol = None

# Test whether variable is defined to be None
if tol is None:
    tol = 0
##############################################
##############################################

#get endpoints and the middle between them - Point


if rs.IsCurve(opCrv): # and not rs.IsCurveClosed(opCrv) and rs.IsCurveClosable( opCrv, tol ):
    cePt = rs.CurveEndPoint(opCrv)
    csPt = rs.CurveStartPoint(opCrv)
else:
    print "not an open curve in respect to the given tolerance"


dist = rs.Distance(cePt, csPt)
nePt = cePt - csPt
nePt = rs.VectorUnitize(nePt)
nePt *= dist/2


midVec = rs.VectorCreate(cePt, csPt)
midVec = rs.VectorDivide(midVec,2)
matrix = rs.XformTranslation(midVec)

nePt = rs.PointTransform(csPt, matrix)

##############################################

#get points of start and end segment for rebuild
segCrvList = rs.ExplodeCurves(opCrv) #gives a list

sSeg = segCrvList[0]
eSeg = segCrvList[len(segCrvList)-1]

sSegPt = rs.CurveEditPoints(sSeg)
ssSegPt = sSegPt[0]
 
eSegPt = rs.CurveEditPoints(eSeg)
eeSegPt = eSegPt[len(eSegPt)-1]

#replace points and rebuild of segments

sSegPt[0] = eSegPt[len(eSegPt)-1] = nePt

sSeg = rs.AddInterpCurve(sSegPt)
eSeg = rs.AddInterpCurve(eSegPt)

#replace segments and join all into closed curve
segCrvList[0] = sSeg
segCrvList[len(segCrvList)-1] = eSeg


clCrv = rs.JoinCurves( segCrvList, delete_input=True, tolerance=tol)

Error:

0. Runtime error (NullReferenceException): Object reference not set to an instance of an object.

Traceback (most recent call last):
SystemError: Object reference not set to an instance of an object.

What is wrong?

Posts: 11

Participants: 3

Read full topic