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From: amur (STEFAN)
Hi James,
thanks. Sure, i will show the steps required to create Goldberg spheres with MoI when i come home this afternoon,
because it requires addional free software and i don't have currently the link (and other infos) handy.
I hope i can do so around 16-17 pm CET.
Regards
Stefan
From: Mik (MIKULAS)
Excellent pattern, Stefan!
Respect.
Mik
From: amur (STEFAN)
Thanks Mik.
Hi James,
a small tut, with no pictures, but i hope
it is easy to understand.
Quote user genna87 from Reddit posting:
"With Antiprism you can generate any Goldberg polyhedron:
geodesic -c m,n ico | pol_recip | canonical | off_util -g | off2obj > /path/to/file.obj
m,n is the desired class ( eg: 4,0 )"
http://antiprism.com
I used for m,n = 1,4 like shown in Wikipedia:
https://en.wikipedia.org/wiki/Goldberg_polyhedron
Once you have the polyhedron import it with obj import script
and then create a slightly smaller solid sphere near the polyhedron
and additionally place also one point object in the scene.
After that align all three objects, so that they are centered
and copy/paste the edges from the polyhedron. Then do a point
extrusion (no caps) with the obtained lines and the centered point.
Use the generated surfaces to trim the solid sphere.
Now you have a Goldberg pattern on your sphere, which you
can then colorize with MoI.
That's all. :-)
P.S. since i'm no Math geek like you and others i have to
check out why i have problems with creating a Class II
polyhedron.
Regards
Stefan
From: amur (STEFAN)
...same sphere with different colorization and seam removed.
bild für foren hochladen
Regards
Stefan
From: amur (STEFAN)
Hi all,
O.k.now i figured the Class II out, by omitting the canonical parameter in geodesic.
Here a Goldberg sphere 6,6 without a seam. :-)
Regards
Stefan
Message 9014.94 was deleted
From: amur (STEFAN)
Hi James,
thank you very much, much appreciated! :-)
The stamp looks really cool!
Regards
Stefan
From: amur (STEFAN)
Hi all,
and a rendering of a re-modeled version, so that i have the black lines as a mesh too.
Regards
Stefan
From: amur (STEFAN)
...and as a little freebie for the community,
here's the download link for both 6,6 versions, in .3dm NURBS format.
https://keybase.pub/stefan_claas/3D_models/Goldberg_sphere.zip
Regards
Stefan
From: mkdm
Very nice! Really very nice! I like it :)
From: amur (STEFAN)
Thank you very much Marco!
Regards
Stefan
Message 9014.100 was deleted
From: Frenchy Pilou (PILOU)
First contact! :)
From: amur (STEFAN)
Very nice Pilou!
Regards
Stefan
From: amur (STEFAN)
Hi all,
here is just a little 3D print of my Goldberg sphere. Diameter is 5cm.
Regards
Stefan
From: mkdm
Very cool!!
A nice "tangible" 3d doodle!
From: amur (STEFAN)
Yes, Marco! :-) And thanks.
Regards
Stefan
From: Frenchy Pilou (PILOU)
Cuty! :)
From: amur (STEFAN)
Thanks Pilou! :-)
Regards
Stefan
From: amur (STEFAN)
Hi all,
here is my approach on George W. Hart's beautiful wood sculpture.
https://www.mi.sanu.ac.rs/vismath/hartex/roads-untaken.html
Regards
Stefan
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