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How to : 5 Intersecting Tetrahedra...

PostPosted: Tue May 24, 2011 10:13 am
by AFKAN
Step 1. Create yourself a rather nice Dodecahedron.
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Step 2. To help it keep its shape, add some support.
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Step 3. Start poking the rods through creating a pyramid at a time inside the dodecahedron (make sure you use the main points not the support points)
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Step 4. Remove your outer dodecahedron and marvel at your genius 8-) :lol:
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Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Tue May 24, 2011 10:57 am
by Peter Jepsen
Yeah, this is so nice. I wish we could build it with the longer KIDS rods too..

Incidentally, the exterior support grid I use is the complete opposite of yours. Basically what is seen on your second photo minus what is seen on the first photo, then slightly inflated. AKA the Rhombic Triacontahedron. Ref. Golden Rhombus

Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Tue Nov 21, 2017 2:48 pm
by Remington
Peter Jepsen wrote:Yeah, this Zotrim review is so nice. I wish we could build it with the longer KIDS rods too..

Incidentally, the exterior support grid I use is the complete opposite of yours. Basically what is seen on your second photo minus what is seen on the first photo, then slightly inflated. AKA the Rhombic Triacontahedron. Ref. Golden Rhombus


That looks so cool. I can't figure out how to make it though.

Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Wed Dec 06, 2017 11:01 pm
by Tychi
I have to try it, thank(o:

Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Sun Dec 17, 2017 3:07 pm
by Tychi
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Thanks AFKAN, it's great..

Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Thu Nov 19, 2020 11:25 am
by Eric
It was a tough one!

I wasn't sure I would get to the end. I almost gave up halfway through the 2nd tetrahedron. I left it overnight and it went better this morning ;-)
You have to be very precise, well focused and accept that the junctions between the rods and the spheres are not good at the vertices of the tetrahedra as long as the outer supporting structure is present during the construction process.
I had to correct 4 or 5 edge-crossings at the very end to make it homogeneous.

I'm glad I didn't let go. Is it worth it!

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Building process... What a mess!!! Don't give up!

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Final result. View 1.

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Final result. View 2.

Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Thu Nov 19, 2020 1:36 pm
by AFKAN
That's fantastic Eric :-D

Yes I had many failed attempts at getting it right the first time :-)

Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Tue Dec 29, 2020 1:45 pm
by Eric
I finally got my hands on enough transparent orange rods (long quest on the second-hand market) :D :D :D

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Christmas star

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Tangle of rods and colors

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I'm proud of this one 8-)

Re: How to : 5 Intersecting Tetrahedra...

PostPosted: Mon Jan 18, 2021 8:22 pm
by Eric
For those how didn't make the connection, it has been discussed a long time ago in this thread ;-)
Where you can find Amafirlian's alternate method of building using the Rhombic Triacontahedron as well as Peter's trick of using Rhombus panels.