organize list of points to create polyline

Hi everyone! I'm trying to order a list containing 10 points so I can create a polyline as shown in the picture (black line).

I could use list item to extract every single point and then feed them into the polyline but maybe there's a more eficient way to do this

Thanks

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Points.gh, 1 KB

Replies to This Discussion

Permalink Reply by Marios Tsiliakos on August 25, 2016 at 2:43am

What I use and it usually works quite well (similar to Tom's) suggestion.

Permalink Reply by peter fotiadis on August 25, 2016 at 3:24am

Well ... this is a typical case that requires a concave hull algo (not convex).

1. The "classic" (using SphereFit and PlaneFit and then the circle as sorting curve) fails for more than obvious reasons. BTW: if you use a sorting curve from a convex hull ... sorting also fails.

2. The also "classic" (Sort by angle using a focus point [variable for fun or the centroid]) also fails for different reasons:

3. The concave hull never fails (but unfortunately the C# is classified as strictly internal):

Permalink Reply by Marios Tsiliakos on August 25, 2016 at 4:48am

Work around, not confidential, non bulletproof but it works only you eye ball it with a tolerance slider.

you can use this until something better comes up.

Permalink Reply by Anders Holden Deleuran on August 25, 2016 at 11:28am

Here's the approach I usually use to sort points radially around a center (using GHPython and RhinoCommon). Similar to a couple of the other suggestions.

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