Here is an implementation of 3D alpha shape, it is using 3D DelaunayCell (standard GH component ??). https://doc.cgal.org/latest/Alpha_shapes_3/index.html https://doc.cgal.org/latest/Alpha_shapes_2/index.html [image] Groups The Milkbox There are a lot of code snippets scattered all ove…

Nice! 3D DelaunayCell is from mesh edit

There are some problems, my way of doing is not very good. I must see if output of 3D Delaunay Cell is ordered ! Meshes have duplicate faces. So at the moment I have no better solutions than removing them !! But there are other problems. It will take some times to solve. [image]

Meshes have duplicate faces. So at the moment I have no better solutions than removing them Try that http://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_Collections_MeshFaceList_ExtractDuplicateFaces.htm

Carving Ice Cream :yum: I found the analogy very good. [image] laurent_delrieu: “Imagine a huge mass of ice-cream making up the space R3R3 and containing the points as “hard” chocolate pieces. Using one of these sphere-formed ice-cream spoons, we carve out all parts of the ice-cream block we ca…

You are not allowed to have so much fun here :smiley: Really nice study!

Thanks, It is fun yes and I wanted to go a bit deeper in Alpha Shape and trying to generate a Brep with “spoon” cutters. Depending on the shape there are some holes. here a Wip Mesh cutter [image] mesh carving.gh (7.7 KB)

What a great shape that is - thanks Laurent. I’m going to make a 3D print of it. To do that I had to whack off enough of the bottom so there was a flat surface big enough to adhere well to the print bed. [screenshot_01] I’ll post a pic of the print when it’s finished.

[IMG_20201005_115227] I especially like how the surface is comprised of both hexagons and pentagons at the same time. I’m going to make a larger one that can accommodate an LED light inside and post it for others to print. Is it OK if I call it Laurent1?

Alpha Shape 3D

Grasshopper

laurent_delrieu (Laurent Delrieu) April 17, 2018, 8:40pm 5

Thanks Mickael,
but this command add holes in my mesh so I wrote mine command and add some others tests. It seems now that my script is more robust, except for little radius.

Alpha Shape 3D Legacy.gh (54.7 KB)

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Alpha Shape 3D

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