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Concave hull #313

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sonomirco opened this issue Sep 1, 2021 · 4 comments

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enhancement 📢

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sonomirco commented Sep 1, 2021

No description provided.

sonomirco added this to To do in Curve via automation

sonomirco added the enhancement 📢 label

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cesarecaoduro commented Sep 2, 2021

http://www.it.uu.se/edu/course/homepage/projektTDB/ht13/project10/Project-10-report.pdf
https://github.com/Liagson/ConcaveHullGenerator
https://www.codeproject.com/Articles/1201438/The-Concave-Hull-of-a-Set-of-Points

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sonomirco commented Jan 6, 2023

After some resources, here are some solutions:

Use the implementation Grasshopper has.
Alpha concave, which is a generalisation of the Concave Hull.
K-nearest
Or from here, we have the Graham Scan or the Jervis March algo

@cesarecaoduro @d3ssy Any preferences?

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d3ssy commented Jan 11, 2023 •

edited

@sonomirco I think you're confusing CONVEX hull and CONCAVE hull.

There is no concave hull in GH, but there is an old third-party implementation of alpha-shape .

And of course it's been requested on mcneel forum.

Collaborator Author

sonomirco commented Jan 11, 2023

Yep, true.
The other code mentioned is from here

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