Create surface from point

[manhgt214]

Hi how to reoder point to create polygon from points.
I want “red boundary” but error wire intersection.

[jfbrigaud]

Hi,

look here:

Return A List of Points From Intersect That Create a Clockwise Polygon

Does anyone have an example of how to sort points retrieved from intersection of geometry into a ordered list of points either clockwise or counterclockwise that forms a closed polygon. Trying to avoid self crossing polygon.

[GavinCrump]

For a shape like that a convex hull should work. Check out Sparrow package.

[RMohareb]

@jfbrigaud

As @GavinCrump wrote you can use convex hull also you can use Alpha shape as shown in the below post

Alpha Shape proplem (Draw outer line around the outside point Cloud at the same plane by ignoring any points that would fall inside.)

Draw outer line around the outside points by ignoring any points that would fall inside. I used Alpha Shape algorethem alphashape · PyPI by install alphashape in Python3 [image] [image] [image]  NwjwfcAuhGcpyVW.png) First select point cloud form revit project by using @Julien_Benoit1 Julien Benoit python script Second use point-cloud-plane-detection-using-ransac @Ewan_Opie to detect…

Concave Hull (Alpha Shape) from list of points with Python?

I cleaned up the code a bit: import clr clr.AddReference('ProtoGeometry') from Autodesk.DesignScript.Geometry import Line from math import sqrt, hypot points, alpha = IN OUT = [] pLen = len(points) alpha2 = alpha * alpha if pLen < 2: raise Exception('AlphaShape needs at least 2 points') for i, p in enumerate(points): for j in xrange(i+1, pLen): if p.IsAlmostEqualTo(points[j]): raise Exception('AlphaShape needs pairwise distinct points') dist = hypot(p.…