Assembeling 5 intersecting tetrahedra
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- Newbie
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Assembeling 5 intersecting tetrahedra
I know have to make the units and how to put them together already but I am having problem on how to assemble the 5 triangles together
can anyone help?
Thanks
can anyone help?
Thanks
2 good site for diagrams
http://www.geocities.com/foldingca/flower.html#R
http://www.derudas.com/origami/modgall.htm
http://www.geocities.com/foldingca/flower.html#R
http://www.derudas.com/origami/modgall.htm
What kind of tetrahedra are you speaking of, I know a lot of different ones. (Author? Where can the diagrams be found? ....)
About your signature:
Begging for diagrams isn´t desired in this forum. If you need some diagrams check the origami database and buy the books.
About your signature:
Begging for diagrams isn´t desired in this forum. If you need some diagrams check the origami database and buy the books.
- Brimstone
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I guess halalula refers to Tom Hull's model. That model is a paon to assemble. My boss bought one of those at a fair and then she put in in a bag threw it on the floor of her car and went drinking. The next day the model was completely disassembled and she took it to the office for me to fix it. I was never able to do it. I used glue to keep it together but i assembled wrong and the model was lost.
I know two pages that show how to do it but even with those instructions I was never able to finish it:
The url's are:
http://www.geocities.com/golics/moduli08_de.htm and
http://www.merrimack.edu/~thull/fit.html
I know two pages that show how to do it but even with those instructions I was never able to finish it:
The url's are:
http://www.geocities.com/golics/moduli08_de.htm and
http://www.merrimack.edu/~thull/fit.html
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Like Esato My first F.I.T was smashed (not by my dog,but while mooving apartment). So I've done another one.I also used the same colur units as in the instruction and used glue....
Here some photos -work in progres.
http://www.flickr.com/photos/87477835@N00/67188865/
Here some photos -work in progres.
http://www.flickr.com/photos/87477835@N00/67188865/
I've made Hull's FIT several times (maybe about 6 times) in various sizes, and every time, I have just as much difficulty assembling the pieces. It's almost always the third one that gets me. On the last one, it took me about two hours of fiddling (you'd think I'd have gotten it in by accident in that time) but then gave up and resorted to looking at a picture of one and then putting the pieces through in the same orientation as the picture. Then, usually the 4th and 5th go in without many problems.
I used some computer help to make my F.I.T.
First, I downloaded http://www.progonos.com/furuti/Origami/ ... es/fit.wrl and http://www.progonos.com/furuti/Origami/ ... s/fit3.wrl.
They are the VRML (3D) models of the FIT with 3 and 5 tetraedra, cf http://www.progonos.com/furuti/Origami/ ... s/fit3.wrl
Then I changed the colors of the tetraedra to match my colors, with http://www.csv.ica.uni-stuttgart.de/vrml/dune/ (I used it on Linux but it seems to run under Microsoft©® Windows©® too)
Then I displayed the 3D model with http://freewrl.sourceforge.net/ ( it seems to run only on Linux but there is a lot of VRML viewer around).
So with that I could rotate and zoom the 3D model
This is then far more easy to construct the F.I.T.
First, I downloaded http://www.progonos.com/furuti/Origami/ ... es/fit.wrl and http://www.progonos.com/furuti/Origami/ ... s/fit3.wrl.
They are the VRML (3D) models of the FIT with 3 and 5 tetraedra, cf http://www.progonos.com/furuti/Origami/ ... s/fit3.wrl
Then I changed the colors of the tetraedra to match my colors, with http://www.csv.ica.uni-stuttgart.de/vrml/dune/ (I used it on Linux but it seems to run under Microsoft©® Windows©® too)
Then I displayed the 3D model with http://freewrl.sourceforge.net/ ( it seems to run only on Linux but there is a lot of VRML viewer around).
So with that I could rotate and zoom the 3D model
This is then far more easy to construct the F.I.T.
Hmmm. . .
I've assembled it several times, it's one of my favorites. (I went through an intersecting frames "phase" awhile ago. . . . But I'm cured now, honest!)
The first one was hard, but the later ones are much easier. I can assemble them on the fly now.
The trick is to be aware of the symmetry. There are two kinds in the FIT: five-fold and three fold. (I highly reccomend the VRML model for your first try)
the five fold faces are the "star" sides. Each "point" of the star is the corner of a different tetrahedra. These trace out a dodecahedron
the three-fold faces correspond to the faces of a single tetrahedron arranged so:
Tetrahedron 1) face
Tetrahedron 2) point (interlocked with tet #1 as described on Hull's page)
Terahedron 3-5) Three edges (one edge of each color ) interlace to form a triangle. This triangle is positioned under the point of tetrahedron #2.
The way I usually do it is assmble the first two tetrahedra (these are easy), then I assemble just a single point (three edges) of the third tetrahedra. I then position this point over one of the faces of the assembled tetrahedra, check to make sure my symmetry is right, then add on the other three edges.
Sorry that this sounds so complicated; it's really easy once you see the pattern. My advice is to get someone who knows how to do it to show you in person. . .
I've assembled it several times, it's one of my favorites. (I went through an intersecting frames "phase" awhile ago. . . . But I'm cured now, honest!)
The first one was hard, but the later ones are much easier. I can assemble them on the fly now.
The trick is to be aware of the symmetry. There are two kinds in the FIT: five-fold and three fold. (I highly reccomend the VRML model for your first try)
the five fold faces are the "star" sides. Each "point" of the star is the corner of a different tetrahedra. These trace out a dodecahedron
the three-fold faces correspond to the faces of a single tetrahedron arranged so:
Tetrahedron 1) face
Tetrahedron 2) point (interlocked with tet #1 as described on Hull's page)
Terahedron 3-5) Three edges (one edge of each color ) interlace to form a triangle. This triangle is positioned under the point of tetrahedron #2.
The way I usually do it is assmble the first two tetrahedra (these are easy), then I assemble just a single point (three edges) of the third tetrahedra. I then position this point over one of the faces of the assembled tetrahedra, check to make sure my symmetry is right, then add on the other three edges.
Sorry that this sounds so complicated; it's really easy once you see the pattern. My advice is to get someone who knows how to do it to show you in person. . .
Gilad Ayalon has uploaded Few pictures in his website who can help those didn't succeded.
http://giladayalonorigami.fateback.com/ ... ns/FIT.htm
http://giladayalonorigami.fateback.com/ ... ns/FIT.htm
I know I might be resurrecting an old topic but I just had a thought.
I constructed the FIT after a few attempts, eventually I found a nice walk through on Youtube that cleared it up a lot. I'm more interested in the geometry of origami than the art so this was right up my ally.
My question is:
Considering that the FIT and a dodecahedron share common vertices, has anyone tried combining the two. I stumbled across this diagram for a dodecahedron http://dev.origami.com/images_pdf/hackysack.pdf and the idea struck me. I may try it over the next while but I'm very busy of late, and also I think I would have to build a new FIT because I made my last one as large as possible with standard paper so to construct a dodecahedron around it might be hard.
Anyone with a smallish FIT willing to try and work out how to build a dodecahedron around it? I'd love to know if it would work!
I constructed the FIT after a few attempts, eventually I found a nice walk through on Youtube that cleared it up a lot. I'm more interested in the geometry of origami than the art so this was right up my ally.
My question is:
Considering that the FIT and a dodecahedron share common vertices, has anyone tried combining the two. I stumbled across this diagram for a dodecahedron http://dev.origami.com/images_pdf/hackysack.pdf and the idea struck me. I may try it over the next while but I'm very busy of late, and also I think I would have to build a new FIT because I made my last one as large as possible with standard paper so to construct a dodecahedron around it might be hard.
Anyone with a smallish FIT willing to try and work out how to build a dodecahedron around it? I'd love to know if it would work!
- Jonnycakes
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- origamimasterjared
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