How to get an array of 3dPoints from given Polyline object in GHPython

Grasshopper
,
1

Guys, maybe it’s to hot today, but I currently cannot figure out how to get an array of 3DPoints from a Polyline object in GHPython.

I am sure it is EXTREMELY simple… but I am currently struggling. Can you quickly help me out?

I am searching for something like .CenterPoint() but as an array of all points of the Polyline.

2

Try this, maybe not the most optimized code but it should do

import Rhino.Geometry as rg

# Input curve as an Item Access Polyline
# Output a

pts = []

segments = curve.GetSegments().Count

for i in range(segments+1):
    pts.append(curve.PointAt(i))

a = pts
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3

This is the same method as above

a = [curve.PointAt(i) for i in range(curve.SegmentCount+1)]
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4

@jordi.arcas and @Adam_M
Thank you both for your answers - that certainly works. :grinning:

However, I still wonder why there is nothing built in. I mean getting the points of a polyline seems like a standard task to me. So I was hoping that I just overlooked something.

5

It does seem like there should be a simpler way.

Using RhinoScriptSyntax you can do:

import rhinoscriptsyntax as rs

rs.CurveEditPoints(curve)

https://developer.rhino3d.com/api/RhinoScriptSyntax/#curve-CurveEditPoints

6

You can use the yourPolyline.ToArray() method. Or cast it using list(yourPolyline).

3 Likes
7

@AndersDeleuran Yes - that was the one that I overlooked. Works exactly like I expected - but just did not recognize it with that name.

Thanks a lot (marked your answer as the solution).

1 Like