Buckyballs Astronomers have discovered the solid form of tiny carbon spheres in deep space inside a vast cloud of particles locked in orbit around two distant...
1692
Alan M
a.michelson
Mar 6, 2012 2:23 am
http://en.wikipedia.org/wiki/Pentakis_dodecahedron <http://en.wikipedia.org/wiki/Pentakis_dodecahedron> "The pentakis dodecahedron ...
1693
Cosmo Guffa
playful.geom...
Mar 7, 2012 1:37 am
Hi folks, Geometric modeling is a great passion of mine. I've been experimenting with techniques to build polyhedra for many years now and though it all I've...
1694
Alan M
a.michelson
Mar 7, 2012 2:57 am
... .\Windows\System32 or your .\Windows\WOW64 directory. ( I fixed it so it has more morphing possibilities.) ... ...
1696
Jack
wa1tej
Mar 22, 2012 4:58 pm
I've always had an interest in spherical geometry. I once wrote a program for an HP HP-97 printing programmable calculator that calculated iteratively (miunute...
1697
Albert Redditt
albert_redditt
Mar 23, 2012 8:21 am
It sounds like your prism's are :  You've got patterns on the outside of the sphere, and they shrink as you delve into the sphere, but remains the same...
1698
J S
railfaninnj
Mar 23, 2012 11:22 am
Thank you. The prisms are of 2 types: regular pentagonal & irregular hexagonal in cross-section. There are 32 in all - 12 pentagonal & 20 hexagonal, each type...
1699
Jack Sullivan
wa1tej
Mar 23, 2012 5:42 pm
Perhaps a good question to ask regarding this problem is what spherical geometry programs might be available that might be able to tackle this sort of thing. I...
1700
Caroling Geary
carolingy
Mar 23, 2012 6:12 pm
I'm not an expert, although I have used Mathematica, which seems like a great program to me. However, here's my humble view on your problem. You said the...
1701
J S
railfaninnj
Mar 23, 2012 7:46 pm
Hi Caroling I'll have to give your suggestion some thought. The method you suggests (using the sides & angles of known regular pentagonal prisms to determine...
1702
J S
railfaninnj
Mar 23, 2012 8:50 pm
I've taken another look at the truncated icosahedron & I had picked up a mistaken impression along the way that the pentagons were regular and that the...
1703
Albert Redditt
albert_redditt
Mar 24, 2012 12:46 am
I forogt i had a soccerball program on my computer, a guy named Dodicat on the FreeBasic forum had posted it a year or so ago. He writes unusually complex...
1704
Adrian Rossiter
adrianrossiter
Mar 26, 2012 5:27 pm
Hi All I have just released Antiprism 0.21, which is a set of command line tools for modelling polyhedron ...
1705
Alan M
a.michelson
Apr 6, 2012 7:53 pm
I've taken a look at the truncated rhombic triacontahedron & you might have picked up the impression that the pentagons were regular and that the hexagons were...
1706
J S
railfaninnj
Apr 6, 2012 8:55 pm
Hi & thanks for the reference. It makes the following statements which I'm not following: The truncated rhombic triacontahedron is a convex polyhedron...
1707
Albert Redditt
albert_redditt
Apr 7, 2012 1:41 am
Sorry for interrupting, but two days ago i got an add in my email from  Edmund Scientific , they had a rhombic triacontahedron magnet set, made up pyramid...
1708
Robert Webb
robertcharle...
Apr 7, 2012 5:14 am
The hexagons can have equal length sides, but are still irregular due to unequal angles (just as a rhombus is a quad with four equal length sides, but is not...
1709
robertcharleswebb
robertcharle...
Apr 7, 2012 5:27 am
I'm currently selling my Great Stella and Stella4D software for a third the normal price, as an experiment to see how it affects sales. Great Stella is a...
1710
Samuel Verbiese
samve47
Apr 7, 2012 10:13 pm
I have it, sitting on another (dead) machine, Rob. And should use it more. My fault if I miss it. I'm no longer active in the vZome gurus, nor in de polyhedron...
1711
J S
railfaninnj
Apr 11, 2012 7:09 pm
Thanks! Without going further into a math proof, can it be correctly assumed that all the irregular hexagons are identical? IOW, this polyhedron is constructed...
1712
Cosmo Guffa
playful.geom...
Apr 11, 2012 9:23 pm
Hello folks, I thought you might be interested in my special offer for my polyhedral lamps as seen here :...
1713
Robert Webb
robertcharle...
Apr 11, 2012 10:53 pm
Correct. The icosahedral symmetry allows any of the hexagons to be mapped onto any other via those symmetries. ... Correct. The icosahedral symmetry allows any...
1714
Alan M
a.michelson
Apr 12, 2012 5:23 pm
... http://cosmic-spacecrafts.blogspot.ca/2012/04/sale-10-off-all-cosmic-spacecrafts-free.html . I'd space after the URL. This way, the hyperlink doesn't catch...
1715
Alan M
a.michelson
Apr 12, 2012 5:47 pm
The Ball of Whacks <http://creativewhack.com/product.php?productid=10> ® ... Edmund Scientific, ... sections that you can build things with. The Ball of...
1716
Alan Michelson
a.michelson
Apr 12, 2012 6:00 pm
Oh, yeah? Here is something else with the same six colors: http://www.newhorizontoys.com/6-color-whacks.html (Thanks to Albert Redditt for inquiring about...
As an exercise using the only geometric figure CAD program available to me (ChemDraw), I surrounded a regular pentagon with what turned out to be 5 irregular...
1719
Alan Michelson
a.michelson
May 10, 2012 9:25 pm
http://tech.groups.yahoo.com/group/synergeo/messages/70070?threaded=1&m=e&tidx=1 ... From: Alan Michelson <amichelson2002@...> Subject: ALAN - Re:...
1720
Alan Michelson
a.michelson
Aug 9, 2012 9:20 pm
... From: Michael Donovan <michael1@...> Subject: Re: [Polytopia] Having Some Code Fun in Tiling To: Polytopia@yahoogroups.com Date: Monday, September...
