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Show HN: Test your shape rotation skills

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Re: Show HN: Test your shape rotation skills

#171

Post by bottled_poe »

whatshisface wrote: post #12

Sometimes the initial rotation hides a part of the shape. Also, I have always wondered if there's a way to translate these shapes to strings for quick "mental algorithm" matching. Something like, "5, left turn, 3, right turn..." I guess you'd need a normal form. The first turn can be defined as always "right" or "left," and subsequent turns can be right, left, up or down. The first turn that's "up" or "down," can be…

Playing on mobile, it would be cool if the accelerometer rotated all the pieces at once.

Re: Show HN: Test your shape rotation skills

#172

Post by orthoxerox »

CodeIsTheEnd wrote: post #158

This reminds me of a very poor interview question I asked a couple of times (and then never asked again because it is a terrible, terrible, interview question). The snake cube puzzle [1] is a puzzle where you have to fold up a string of 27 cubes, with fixed "turns" like the shapes in the OP, into a 3x3x3 grid. The goal was not to find a solution to the puzzle, but to find the smallest 2d area the snake could fit into…

27x1 would again be the smallest 2d area.

Re: Show HN: Test your shape rotation skills

#173

Post by ak39 »

ouid wrote: post #160

20 matches is my high after spending 20 minutes with it. I think I could probably get that to 30 ish with another hour. Obviously you should not be rotating, but finding features of the shapes that are invariant with respect to rotation to calculate. We can think of the two middle segments as defining two coordinate axes which I'll just call the body, with the remaining segments the legs. There are three cases. 1) bo…

First attempt is 5. But anxiety levels were sky high. Throwback trauma.

Re: Show HN: Test your shape rotation skills

#175

Post by yaronka »

ksec wrote: post #151
mimentum wrote: post #148

I believe those with schizophrenia (and/or schizotypal personality disorder) have greater difficulty with these types of visual and spatial reasoning.

Interesting, I thought it would be people with Aphantasia that would have problem with this test.

Yep, as aphant, I can't rotate. Instead I describe the shape to words and look for a match. Something like - the shapes short tail facing outwards, long tail straight.

Re: Show HN: Test your shape rotation skills

#177

Post by ohwellish »

in case you need more stats, first 7 trys

4 12 (10sec) 8 (15sec) 1 (120sec) 11 (10.91sec) 9 (13.33sec) 10 (12sec)

first try was with touchpad, rest of them with mice that 1/120 was brutforcing, there was at least 4 or 5 similar shapes with deadzones maybe there should be a way to rotate viewport manually (for some time penalty?) and bruteforcing should be time taxed as well though

Re: Show HN: Test your shape rotation skills

#179

Post by kuhewa »

crdrost wrote: post #147
whatshisface wrote: post #12

Sometimes the initial rotation hides a part of the shape. Also, I have always wondered if there's a way to translate these shapes to strings for quick "mental algorithm" matching. Something like, "5, left turn, 3, right turn..." I guess you'd need a normal form. The first turn can be defined as always "right" or "left," and subsequent turns can be right, left, up or down. The first turn that's "up" or "down," can be…

> The first turn can be defined as always "right" or "left," No it can’t, not in 3D... it is just a turn. You can however choose to rotate about the first segment until the turn is Right, then use this orientation for the rest. In terms of normal form and restarts, who cares? Just generate the string both ways, it’s 2n computations, choose the lowest in lexicographic order, and life is good. If you get to billions of…

> No it can’t, not in 3D... it is just a turn

Not if it is chiral. then whatever turn is defined as right is not left

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