this post was submitted on 02 Nov 2024
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[–] [email protected] 36 points 2 days ago (4 children)

This is honestly a legit die imo. I assume those balls are pretty well balanced.

[–] [email protected] 22 points 2 days ago (3 children)

I think the D120 is the maximum possible isohedral (geometrically symmetric) fair die. A golf ball is probably pretty close to fair, though number 327 seems like it might be more difficult to balance than 12, 20, 30, or 60.

[–] [email protected] 5 points 2 days ago

A D326 with one face a reroll.

[–] [email protected] 2 points 1 day ago

We have dice from them, the funny shaped dice are great to look at, terrible to stack

[–] [email protected] 0 points 1 day ago (1 children)

I'm just seeing a pattern here, but shouldn't you be able to go to 240? I mean, it'd have to be a big fuckin' die, but it seems like it should work.

[–] [email protected] 2 points 1 day ago* (last edited 1 day ago) (1 children)

shouldn’t you be able to go to 240?

Not really. The faces of the D120 are already asymmetric (scalene) triangles. There's no way to split these into additional faces while keeping them all the same shape.

Any larger geometrically fair die would have to be from an infinite family (prisms, bipyramids, and trapezohedra), which are "impractical in reality due to the tendency to roll for a long time".

[–] [email protected] 1 points 1 day ago (1 children)

A tendency to roll for a long time would be true for any many-sided die, no? I can't imagine the 120 stopping quickly either.

[–] [email protected] 1 points 1 day ago (1 children)

Yes, but since faces are essentially distributed over a cylinder, rather than a sphere, it is more of an issue.

[–] [email protected] 1 points 14 hours ago

Ah yeah, that's a good point

[–] [email protected] 17 points 2 days ago (1 children)

Figuring out which number is up is PITA though.

[–] [email protected] 4 points 1 day ago

Even worse: with an odd number of sides, there are cases where none is up.

[–] [email protected] 5 points 1 day ago* (last edited 1 day ago) (2 children)

uhhh you can see there are gaps between some faces and there arent on others, so it really isnt well balanced

edit: i somehow typed f`ces

[–] [email protected] 4 points 1 day ago (1 children)

Oh yeah u right, i didnt even look that close. I just assumed nobody would create such an asymmetrical atrocity. I can never look at golf balls the same. Not that i do ever look at them.

[–] [email protected] 2 points 1 day ago (1 children)

there are gaps between some faces and there arent on others, so it really isnt well balanced

But as long as all the faces are the same size, and the die never lands on the gaps (or is rerolled if it does), would that be a fair die?

[–] [email protected] 2 points 1 day ago

Unless some numbers are opposite of a gap, then it could never land with that number facing up.

Each side needs an opposing flat part, and I don't think that can happen with a die with an odd number of sides.

[–] [email protected] 2 points 1 day ago

This is more of a spin down or a counting die than something you would roll

[–] [email protected] 4 points 1 day ago (1 children)

I wonder what opposite sides add to

[–] UndercoverUlrikHD 2 points 1 day ago

In case it's a genuine a question, there isn't an opposite side to odd-sided dice. Had it been a d326 it would have been 326+1 in total, if it were a d328 it would be 328+1