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Skateboard Tricks and Topological Flips

arxiv.org

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Re: Skateboard Tricks and Topological Flips

#61

Post by axegon_ »

fokinsean wrote: post #48
jwilber wrote: post #45

Earlier quoted context omitted.

And these are just for street! Transition has its own set of weird names (losi, andrecht, g-pivot, etc.), including some slight street overlaps (varial, pivot, etc.). I have a little passion project where we log pro’s tricks and interview them called 4ply[0]. The naming convention is something we always have to get right to make the logged data at all useable. I actually grew up skating with Erick Winkowski but can’t…

That's awesome! The site seems down for now but I'll check again later. Also I'll go ahead and plug the site I'm helping rebuild. https://skatevideo.site

Holy!!! That site still exists??!?!?!?!?!! I remember when this was filled with videos which were mostly hosted on what were google videos back in the day(and a small number on vimeo). Must have been 2006-7-8-ish...

Re: Skateboard Tricks and Topological Flips

#62

Post by rawling »

volta83 wrote: post #55
nathancahill wrote: post #16

Generated the animations from the repo linked in the paper: https://imgur.com/a/SJcAvHF The specific tricks with their matrices are here: https://github.com/holomorpheus/topological-flips/blob/main/...

Really interesting to see the hardflip animated vertically but the inward heelflip isn't. I always did hard flips as varial kickflips, but with fs-shuv instead of bs-shuv.

And then the 360 hardflip goes back to not doing the vertical bit.

Re: Skateboard Tricks and Topological Flips

#63

Post by jwilber »

axegon_ wrote: post #60
fokinsean wrote: post #32

Here's a fun one to debate with your skate friends, nollie and fakie tricks are "swapped". For example: - nollie fs 180 and fakie fs 180 (fs half cab) are two different directions: nollie fs 180 is in front of you and fakie fs 180 is behind you going blind - nollie 5-0 and fakie 5-0 (fakie switch nosegrind) lean differently on the grind: nollie 5-0 you pop off your nose and land on your back truck, fakie 5-0 you pop…

> - nollie fs 180 and fakie fs 180 (fs half cab) are two different directions: nollie fs 180 is in front of you and fakie fs 180 is behind you going blind That is till this day(12 years since I last set foot on a skateboard) the most illogical thing. Especially when combined with board slides which were also not apparent from the start(for years on I called front side board slide back side) and from a logical perspec…

The rail tricks are simple if you just think of whether it’s your toes (fs) or heel (bs) facing the obstacle and ignore any body turn motion.

Re: Skateboard Tricks and Topological Flips

#64

Post by fokinsean »

axegon_ wrote: post #60
fokinsean wrote: post #32

Here's a fun one to debate with your skate friends, nollie and fakie tricks are "swapped". For example: - nollie fs 180 and fakie fs 180 (fs half cab) are two different directions: nollie fs 180 is in front of you and fakie fs 180 is behind you going blind - nollie 5-0 and fakie 5-0 (fakie switch nosegrind) lean differently on the grind: nollie 5-0 you pop off your nose and land on your back truck, fakie 5-0 you pop…

> - nollie fs 180 and fakie fs 180 (fs half cab) are two different directions: nollie fs 180 is in front of you and fakie fs 180 is behind you going blind That is till this day(12 years since I last set foot on a skateboard) the most illogical thing. Especially when combined with board slides which were also not apparent from the start(for years on I called front side board slide back side) and from a logical perspec…

Well, the "logic" for fakie is that your tail remains the reference even though you are popping backwards. Therefore you would spin the same direction for fakie fs 180 as you would for regular fs 180.

> I never figured out how to classify nollie/fakie board and lip slides front or back

Yep this one still trips me up to and is great argument over some beers. Especially when you introduce flip tricks into them as well :p

Re: Skateboard Tricks and Topological Flips

#65

Post by cj_f »

fokinsean wrote: post #14
joncrane wrote: post #9

So what are the 4 tricks? Kickflip, heelflip, flip + shove it in the "natural direction" (e.g. varial kickflip, 360 kickflip), and flip + shove it in the unnatural direction (e.g. hard flip)?

I'm guessing it's kickflip, heelflip, bs shuv, and fs shuv. Your definition leaves out varial heels and inward heels. Edit: On second thought I'm still not sure, I saw this in the paper, and I'm guessing they're classifying both direction shuvs as the same, and kick/heelflip as the same Below we list these four tricks with their corresponding residue class in Z/4Z. 0 ↔ Ollie 1 ↔ 180 Shove-it 2 ↔ 360 Shove-it 3 ↔ 540…

How is a 360 shove it not equal to an ollie? and a 540 shuv it equivalent to a 180 shove it?

Re: Skateboard Tricks and Topological Flips

#66

Post by volta83 »

rawling wrote: post #62
volta83 wrote: post #55

Earlier quoted context omitted.

Really interesting to see the hardflip animated vertically but the inward heelflip isn't. I always did hard flips as varial kickflips, but with fs-shuv instead of bs-shuv.

And then the 360 hardflip goes back to not doing the vertical bit.

That's the main reason i did it that way.

I never managed a 360 hard flip on flat, but i could do them over 2 stair steps.

If you are used to do hard flips very vertically, its really hard to do a 360 hardflip, even over stairs.

Re: Skateboard Tricks and Topological Flips

#67

Post by odessacubbage »

axegon_ wrote: post #60
fokinsean wrote: post #32

Here's a fun one to debate with your skate friends, nollie and fakie tricks are "swapped". For example: - nollie fs 180 and fakie fs 180 (fs half cab) are two different directions: nollie fs 180 is in front of you and fakie fs 180 is behind you going blind - nollie 5-0 and fakie 5-0 (fakie switch nosegrind) lean differently on the grind: nollie 5-0 you pop off your nose and land on your back truck, fakie 5-0 you pop…

> - nollie fs 180 and fakie fs 180 (fs half cab) are two different directions: nollie fs 180 is in front of you and fakie fs 180 is behind you going blind That is till this day(12 years since I last set foot on a skateboard) the most illogical thing. Especially when combined with board slides which were also not apparent from the start(for years on I called front side board slide back side) and from a logical perspec…

all these terms originated from skating pools so you have to visualize them relative to your position on a transition as opposed to flat. fs/bs is quite literally how you are facing the the wall while fakie is simply treated as the inverse of your natural position.
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