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tri-O [message #46682] Mon, 09 April 2012 13:17 UTC Go to next message
avatar stop4stuff  is currently offline stop4stuff
Messages: 3178
Registered: June 2010
Go to my shop
Shapie Expert
Just over a year ago, via a request in the 3D modeller needed forum I 'discovered' the works of Charles O. Perry and from that thread, in particular, the Indiana Arc.

http://img198.imageshack.us/img198/9258/4946064011398d78286e.jpg


I managed to recreate the arc as a printable 3D model - http://shpws.me/3X8r - however I was not able to gain permission to offer my model for sale.

The other day I got back to thinking about the arc and what makes it what it is. Three curved plates form the arc, starting at the bottom from the edge of a triangle to indicating the coners of a triangle at the top back to the bottom again on the edge of another triange displace by one side clockwise (or ccw depending which end you start). Where the plates intersect and overlap, the excess is uniformly removed.

What I've come up with is a wire representation of the edges and creases of the plates and joins. I call it tri-O.

http://www.shapeways.com/openfilens/533180/533180.v1.s14.convert.large.jpg

It may be a little difficult to make out the similarities in the geometry, I have trouble seeing it myself even though I created the model.

And this is where you good people come in. How do you think I can better describe Perry's original form? I want to keep the ends closed but am thinking along the lines of the wires representing the plate edges having a square cross-section and maybe the 'crease' wires either as a triangle, or an angled rectangle cross-section.

Cheers,
Paul
Re: tri-O [message #46757 is a reply to message #46682 ] Tue, 10 April 2012 19:44 UTC Go to previous message
avatar pdb  is currently offline pdb
Messages: 131
Registered: January 2012
Go to all my models
Senior Member
its took me a while too.....but i see it now.......well stilll get a bit confused at the top.
very nice idea mate

i like what your proposing as well.....wish i knew how to create stuff like this

as for ideas im rubbish with this kind of geometry. will have a think and let u know.


boop

 
   
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