Skateboard Tricks and Topological Flips
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Re: Skateboard Tricks and Topological Flips
#2The end of the paper points to https://github.com/holomorpheus/topological-flips
Re: Skateboard Tricks and Topological Flips
#3Reminds me of this (less math-heavy!) analysis of "Skateboarding Science" about Rodney Mullen: https://www.youtube.com/watch?v=yFRPhi0jhGc
Re: Skateboard Tricks and Topological Flips
#4I really like the phrase "quaternionic varial kickflip".
Re: Skateboard Tricks and Topological Flips
#5Correct me if I'm wrong, but the whole beginning of the article implies that the skateboarder is "regular" in terms of foot placement, meaning the right foot is on the tail and the left foot is at the front.
The fact that each skater can reverse their stance (aka switchstance), doesn't that double the possible number of flip tricks?
Re: Skateboard Tricks and Topological Flips
#6Correct me if I'm wrong, but the whole beginning of the article implies that the skateboarder is "regular" in terms of foot placement, meaning the right foot is on the tail and the left foot is at the front. The fact that each skater can reverse their stance (aka switchstance), doesn't that double the possible number of flip tricks?
Not really, the flipping maneuver remains the same, the stance is more of a modifier. A 360 flip and a switch 360 flip are both still just 36 flips, you’re just facing a different way in each.
Re: Skateboard Tricks and Topological Flips
#7Correct me if I'm wrong, but the whole beginning of the article implies that the skateboarder is "regular" in terms of foot placement, meaning the right foot is on the tail and the left foot is at the front. The fact that each skater can reverse their stance (aka switchstance), doesn't that double the possible number of flip tricks?
Wouldn't symmetry cover that? In this context, regular and switch are "mirror images" of each other.
Re: Skateboard Tricks and Topological Flips
#8Correct me if I'm wrong, but the whole beginning of the article implies that the skateboarder is "regular" in terms of foot placement, meaning the right foot is on the tail and the left foot is at the front. The fact that each skater can reverse their stance (aka switchstance), doesn't that double the possible number of flip tricks?
Not really, the flipping maneuver remains the same, the stance is more of a modifier. A 360 flip and a switch 360 flip are both still just 36 flips, you’re just facing a different way in each.
They specifically talk about "left handed" rotation for a kickflip and a heelflip being right handed.
However for a goofy skater, the opposite is true.
Re: Skateboard Tricks and Topological Flips
#9So 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)?
Re: Skateboard Tricks and Topological Flips
#10Correct me if I'm wrong, but the whole beginning of the article implies that the skateboarder is "regular" in terms of foot placement, meaning the right foot is on the tail and the left foot is at the front. The fact that each skater can reverse their stance (aka switchstance), doesn't that double the possible number of flip tricks?
Wouldn't symmetry cover that? In this context, regular and switch are "mirror images" of each other.
I suppose. Maybe I missed a part where they say they're using a regular stance skater for the sake of simplicity.
Note that a goofy skater could also do the moves described in the paper, but it would be a different trick because he's doing it switchstance.
(Source: the rules of SKATE per Battle of the Berrics, the skater has to declare his stance ahead of time for the purposes of normal vs switch tricks, aka the "Skategoat" (Leandre Sanders) rule)