Correcting Polyline point order help

[RT_SD]

Hi. I've got a bunch of polylines generated from intersecting spheres using the intersectionanaylsis SOP. They're ellipses but the point order is bad. How can I sort the points in order around each ellipse?

I tried fuse, add, join, resample, connectadjacentpieces, find shortest path, even asked chatGPT, but nothing seems to work (delete prims, fuse, connect adjacent, find shortest path gets the best result but only for half the curve and only by manual start/end selection).

 

Its seems you should be able to walk arround the path using point proximity as a guide somehow, but I don't know how to do it in vex. Any ideas?

Polyline sorting.hiplc

Edited June 30 by RT_SD
Added HIP file

[Librarian]

@RT_SD post that file Please

[RT_SD]

4 minutes ago, Librarian said:

@RT_SD post that file Please

Done!

[RT_SD]

Cconceptually would this work? :

Start at point 0.
Findt the nearest point (except itself), and create a polyline between it and the nearest one, add theses two points to an array.
Repeat starting from the last added point to the array, and excluding all other points in it.
Set ptnum to the array order.

Edited June 30 by RT_SD

[dleonhardt]

You can use the PolyPath SOP to make a single open polygon with the correct vertex order out of the Intersection Analysis output, because Intersection Analysis doesn't output a single continuous polyline. After that you can use a Sort SOP set to "Point Sort: By Vertex Order" to transfer the correct order to the points.

Edited June 30 by dleonhardt

[RT_SD]

2 hours ago, dleonhardt said:

You can use the PolyPath SOP to make a single open polygon with the correct vertex order out of the Intersection Analysis output, because Intersection Analysis doesn't output a single continuous polyline. After that you can use a Sort SOP set to "Point Sort: By Vertex Order" to transfer the correct order to the points.

Yep that did it, cheers!