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 Post subject: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 8:13 am 
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Designed by Nkrasn11. For more details look here: http://twistypuzzles.com/forum/viewtopic.php?f=9&t=16533&start=0&hilit=7x3x5

Video: http://www.youtube.com/watch?v=qpD7_Q9Zr7E

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 8:18 am 
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Weird shape, but cool!

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 8:21 am 
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The cube that ate too much

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 8:24 am 
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very comical! :lol:
does the bulge need to be that big?
and I recall reading quite a while ago that it doesn't shape shift... is this true?

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 8:32 am 
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I believe cuboids are unable to shapeshift even one of the dimensions is odd. As all three are odd, it doesn't make sense, unless the fact that all of them are odd is some exception. I can't see it shapeshifting though.

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 9:31 am 
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looks amazing! But does the roundness really need to be that big?

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 9:32 am 
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I love the puzzle... I'm just not too keen on the shape. Oh well, still looks fun to play with! :)

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 11:01 am 
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It's a bulge-oid.

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 11:44 am 
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Very nice work, only I'm slightly disappointed it wasn't stickered like a pregnant woman. :P

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 11:51 am 
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Woah - that's a massive air bubble. :shock:

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 11:59 am 
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"Not really a cuboid" is quite an understatement here. :lol: Cool puzzle!

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 12:36 pm 
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That is one weird shape. :D


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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 1:42 pm 
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This is an optical illusion, the stickers are bubbled! :lol:

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Sun Apr 03, 2011 2:28 pm 
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Rentlix wrote:
I believe cuboids are unable to shapeshift even one of the dimensions is odd. As all three are odd, it doesn't make sense, unless the fact that all of them are odd is some exception. I can't see it shapeshifting though.


Nah, odd cuboids can shapeshift. The 3x3x5 is a trivial example, and a 2x3x4 disproves the "all of them are odd" speculation. Tony Fisher gives a good test of shapeshifting cuboids here:

http://www.twistypuzzles.com/forum/view ... 15&t=14570

Quote:
A cuboid is capable of shape shifting when (two or more edge unit lengths are different and odd) or (two or more edge unit lengths are different and even) excluding cuboids with one or more edge unit length of one.


This 3x5x7 looks to me like something is trying to get out...


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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Mon Apr 04, 2011 6:14 am 
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That thing is huge!


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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Mon Apr 04, 2011 9:13 am 
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It looks like it's about to explode from all that internal pressure, or pop like a balloon! :shock:

Does it do 90 degree turns?

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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Mon Apr 11, 2011 8:00 pm 
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Wow! Nice one! How much did that cost you to make?


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 Post subject: Re: 3x5x7 - not really a cuboid
PostPosted: Tue Apr 12, 2011 6:12 am 
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No, it does not do 90 degree turns. See original post.

It is printed in sparse mode, not solid. Therefore is does need 500ccm of material. This is not cheap.

But it turns nearly perfect. I think it is designed for a perfect grasp. The fingers and the heel of hand supports the turning. I am proud to own this puzzle.


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