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Re: WTF ? ERROR: The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron.

AM
Adrian Mariano
Sat, Sep 25, 2021 6:19 PM

I was answering a question about how to make dice.  If you want a
truncated icosahedron or a thing like the cat house:

include<BOSL2/std.scad>
include<BOSL2/polyhedra.scad>

regular_polyhedron("truncated icosahedron", r=1);
right(3) spheroid(style="icosa", $fn=15);

But if you're talking about 3d printing it's presumably better to
print the faces and somehow snap them together, which is a rather
different modeling task.

On Sat, Sep 25, 2021 at 2:06 PM Dan White via Discuss
discuss@lists.openscad.org wrote:

---------- Forwarded message ----------
From: Dan White d_e_white@icloud.com
To: OpenSCAD general discussion discuss@lists.openscad.org
Cc:
Bcc:
Date: Sat, 25 Sep 2021 18:06:13 -0000
Subject: [OpenSCAD] Re: WTF ? ERROR: The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron.
Sure, if you are making gaming dice.

HOWEVER, this is my first step toward calculating/generating geodesic spheres.
This Geodesic Dome Cat House got me thinking about a geodesic helmet !
This is a 3v dome.
Then I saw this Low Cost Astronaut Helmet from Instructables which is a truncated icosahedron like a soccer ball.
I am shooting for a 3v helmet, and then maybe a 4v version.
Keep your eyes on Thingiverse !

Dan White | d_e_white@icloud.com ------------------------------------------------ “Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.” (Bill Waterson: Calvin & Hobbes)

On Sep 25, 2021, at 1:21 PM, Father Horton fatherhorton@gmail.com wrote:

A plus to the small spheres is that you can get nice rounded edges if you make them not quite so small.


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---------- Forwarded message ----------
From: Dan White via Discuss discuss@lists.openscad.org
To: OpenSCAD general discussion discuss@lists.openscad.org
Cc: Dan White d_e_white@icloud.com
Bcc:
Date: Sat, 25 Sep 2021 18:06:13 -0000
Subject: [OpenSCAD] Re: WTF ? ERROR: The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron.


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I was answering a question about how to make dice. If you want a truncated icosahedron or a thing like the cat house: include<BOSL2/std.scad> include<BOSL2/polyhedra.scad> regular_polyhedron("truncated icosahedron", r=1); right(3) spheroid(style="icosa", $fn=15); But if you're talking about 3d printing it's presumably better to print the faces and somehow snap them together, which is a rather different modeling task. On Sat, Sep 25, 2021 at 2:06 PM Dan White via Discuss <discuss@lists.openscad.org> wrote: > > > > > ---------- Forwarded message ---------- > From: Dan White <d_e_white@icloud.com> > To: OpenSCAD general discussion <discuss@lists.openscad.org> > Cc: > Bcc: > Date: Sat, 25 Sep 2021 18:06:13 -0000 > Subject: [OpenSCAD] Re: WTF ? ERROR: The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron. > Sure, if you are making gaming dice. > > HOWEVER, this is my first step toward calculating/generating geodesic spheres. > This Geodesic Dome Cat House got me thinking about a geodesic helmet ! > This is a 3v dome. > Then I saw this Low Cost Astronaut Helmet from Instructables which is a truncated icosahedron like a soccer ball. > I am shooting for a 3v helmet, and then maybe a 4v version. > Keep your eyes on Thingiverse ! > > Dan White | d_e_white@icloud.com ------------------------------------------------ “Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us.” (Bill Waterson: Calvin & Hobbes) > > On Sep 25, 2021, at 1:21 PM, Father Horton <fatherhorton@gmail.com> wrote: > > > A plus to the small spheres is that you can get nice rounded edges if you make them not quite so small. > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org > > > > > > ---------- Forwarded message ---------- > From: Dan White via Discuss <discuss@lists.openscad.org> > To: OpenSCAD general discussion <discuss@lists.openscad.org> > Cc: Dan White <d_e_white@icloud.com> > Bcc: > Date: Sat, 25 Sep 2021 18:06:13 -0000 > Subject: [OpenSCAD] Re: WTF ? ERROR: The given mesh is not closed! Unable to convert to CGAL_Nef_Polyhedron. > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org