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• So I wanted to show you some deleted scenes that didn't make it to filming time from the

• metachirality script, or idea-pile, because it kind of goes from an idea-pile to a story

• that hopefully makes sense.

• And anything not essential to that particular story is gonna get deleted.

• So here's some examples of that.

• Most of the time when people talk about symmetry they talk about discrete symmetries, like

• this has symmetry when turned 72 degrees but not anywhere inbetween.

• Unlike a circle which can turn an infinitely small amount and have symmetry.

• But with continuous screw symmetry you can't just go any infinitely small amount around

• and forward, it has to be in the right proportions.

• So it kind of gets calculusy, like maybe you could describe the continuous symmetry using

• the slope of the threads, or maybe use degrees of rotation per millimeter?

• Things with continuous screw symmetry also, of course, have a discrete translation symmetry.

• Move it forwards by the distance between threads and it looks the same.

• And the foot thing has translation symmetry too, every five feet (or every 45 millimeters

• if you want the metric conversion), and you wonder if you could avoid having that extra

• symmetry and only have screw symmetry, but you'd have to not have the feet come back

• around to the same spot, like, the angle between them can't add up to a multiple of 360 degrees

• no matter how many times you add it together.

• And you could do that by using an irrational angle so it never comes around to the same

• spot, like a vine where the leaves grow at the golden angle around the stalk each time

• and so it has golden angle screw symmetry only, no translation symmetry ever, which

• means no leaves ever grow out of the same direction from the stalk and can get maximum

• sunlight.

• That's great because our foot tower deserves to grow and thrive in its natural state with

• a plant-like symmetry that will allow it to flourish.

• Anyway if you want to avoid extra symmetry, now you have to worry about symmetry the other

• way, around a cross section.

• Like this double helixy noodle has 2-way rotational symmetry, which you suppose is just part of

• its double-helixy nature, while your other pasta has three way rotational symmetry on

• a cross section so its a triplehelix.

• And your drill bits seem to mostly have 2-way rotational symmetry so they're basically

• just like rotini.

• Speaking of 180 degree rotations, there is an exception to the metachirality of screw

• symmetry, that's when it's a discrete screw turn of 180 degrees because then it's

• the same to the right as to the left.

• Or if you already have another symmetry on the cross section such as two-fold mirror

• symmetry like in the kind of plants that grow opposite pairs of leaves and have a 90-degree

• screw symmetry, well, now that 90-degree screw symmetry is the same both ways.

• So whether an entire thing is metachiral depends on its whole group of symmetries, not just

• each individual symmetry.

• So screws and drill bits all have the same chirality because of convention, but what

• about these things that have the opposite chirality though they're a little conical

• but we'll ignore that for now, also some nice 5 and 6 fold rotational symmetry going

• on, but these are called easy-outs and they go counterclockwise because they are for drilling

• out bolts, like if the head of a bolt comes off and its stuck in something and you want

• to get it out you can drill a hole in the bolt and then use one of these in there, and

• it will grip and drill into the bolt while turning counterclockwise which will encourage

• the bolt to turn counterclockwise and come out.

• Also maybe something about the chirality of spiral staircases in castles and how to defend

• your tower from invading swordsmen if you're left handed, and did you know very rarely

• a person or animal will come out the opposite chirality, like their organs are the other

• way round, and that's a different thing from right or left handedness?

• So yeah those are my deleted scenes and there's some interesting stuff in there, I really

• like the foot plant outside, but nothing in there is essential and my videos are art pieces,

• it's not enough for something to be interesting, or funny, or cool, or educational.

• It needs to be doing all of that, plus be essential to the storyline.

• So most of my time is spent researching, writing, and editing the script.

• And at the same time I'm doing that I'm planning and imagining what the visuals are going to

• be.

• And most of that stays in my head so I like to get to filming as soon as possible before

• I forget the visuals I have in mind.

• Filming usually only takes a day or two, but it's the most exciting part to watch so it's

• a little overrepresented on my lens uploads.

• So here are some of those that I managed to save from filming this video so you can see

• what filming kinda looks like in real time rather than me narratizing after the fact

• what I think filming is like.

• Alright, it's 8am, I'm almost done setting up to film Metachirality Part 2, I just realized

• I've got the wrong kind of pasta so, but I don't need that till the second half of the

• video.

• Well, the camera crashed mid-filming.

• We're gonna hope it can recover the data.

• So it looks like we didn't lose anythnig, though I'm gonna hunt around for another memory

• card.

• Not sure I have another memory card.

• You will be seeing this one in the video.

• I'm about a 5th of the way through the script, got a couple good hours of filming in, it's

• time for second breakfast.

• And your homework, if you want, is to fill out this diagram.

• And there's our foot selfie.

• I photoshopped the foot selfie to get me lots

• of feet, just got a few more to cut out.

• But first I'm gonna break for lunch.

• *Noodles, noo-noodles, noo-noodles, noo-noodles*

• Well I made a pile of feet, there's my pile of feet.

• It's 8:30, I've almost finished setting up to film.

• I've gathered my props, and I was gonna pre-drill the holes through the feet but now that I'm

• looking at these drill bits I think I have to spend a little time re-writing, cuz these

• have to be in the video.

• Edited my script, I think the drill bits are gonna make better examples than the one I

• I also had the idea to try welding rod instead of pipe cleaner.

• It'll be stiffer but still has this nice texture so the feet will keep their angle.

• But now it's time for 2nd breakfast!

• I didn't have the right size drill bit because these ones keep breaking so I borrowed this

• beautiful shiny set and I'm so jealous of it and I want one.

• But yeah, that size worked perfectly.

• I'm about two-thirds of the way through filming now.

• I really like how my foot staircase came out.

• And now it's time for lunch.

• Guess what's for lunch.

• *Noodles noo-noodles, noo-noodles, noo-noodles*

• It's 5:40 and I just finished filming which is good cuz I have to leave in a minute.

• I wasn't sure I was gonna get the rest of the filming done today but I'm glad I did

• so I can edit tomorrow!

• Ya I had to do things like make this pastakitty.

• It was important.

• So yea those are the filming-day lens clips, and Lens is a patron-only thing where I can

• upload short clips, people can see what I'm working on and, yknow, where their money's

• going.

• And they disappear after 24 hours.

• So it's very low-pressure, I can just share whatever.

• After I film then I record my narration and I edit the footage to the narration.

• And I don't use stop-motion, some people think I do.

• I film it all in real time and I end up with many hours of footage.

• For this video it's about 7 hours of footage.

• And that's because I want to be able to get really granular about how I edit and what's

• in real time and what's not.

• Because I usually use a lot of temporal texture, where things being in real-time or sped-up

• or how I make the transitions (or lack of transition), that's all part of the flow of

• the scene.

• And I'm very picky about that.

• I'll also mention: I do a lot of reading out loud of my script while I'm writing, which

• helps in editing and getting a feel for how it's flowing.

• And that helps, come time to record the narration because I've already basically been practicing

• for a week or more.

• It's great to be both writing and acting the narration because I'm very picky about how

• I want the words to be expressed and pronounced and the cadence of the narration.

• So.

• Unlike this video, which is rambled in real-time.

• Ok that's it!

• Bye!

So I wanted to show you some deleted scenes that didn't make it to filming time from the

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# Deleted scenes and making of Metachirality!

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林宜悉 posted on 2020/03/30
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