I am a software engineer at a rocket company. There was a bug discovered in the code having to deal with interpreting rocket orientation in some simulation code originating from a mistake in the quaternion math. Despite having a physics degree, I was not at all familiar with quaternions so I turned to the internet for guidance. Your videos on quaternions helped me understand them enough to discover the mathematics mistakes and derive the correct formulae. Just thought you'd like to know this video helped launch rockets :)

@JKTCGMV13

Жыл бұрын

I'm a software engineer in aerospace too. Coming back to this video of his because now they want me working with quaternions. I definitely recommend the interactive version of these videos for anyone really trying to learn quaternions.

@peanies948

Жыл бұрын

I am also a rocket in software engineering and this work has helped a lot with my video,nuclear weapons work with me and it was help

@JKTCGMV13

Жыл бұрын

@@peanies948 you are a rocket who can use the Internet and nukes work with you? Sounds like GBSD is going to have some real cutting edge AI ( ͡~ ͜ʖ ͡°)

@peanies948

Жыл бұрын

@@JKTCGMV13 ahh my pocket is full of banana seeds

@joshwoloszyn

Жыл бұрын

@@peanies948 i am also a engineer in rocket aerospace too, and I need your help. send nukes

I don't say this lightly: Your videos and especially these interactive videos will pioneer the future of education. I'm often disappointed in our school system ( here in germany but probably applies for other countries as well). Schools don't use the potential of modern media thereby being inefficent and wasting the stundent's time and undermine their curiousity. As a teacher I try to work against that but get caught in the same fatigue rather often. But being confronted with new topics this way I become like a child again in the best sense : I'm curious and full of wonder. And it's fun to learn something new. I have regained hope that school can be like that most of the time for future generations of students.

@hierkonnteihrewerbungstehe5636

4 жыл бұрын

I fully agree. Since my school is closed cause of Corona I'm studying by using things like this (often instead of my homework). I have the feeling that i'm learning much more than I would normally do during school. I'm almost sad that next week I have to go to school again and become forced to boredom instead of using my curiosity to learn new things.

@daniboy2619

4 жыл бұрын

Its wonderful that you as a teacher is doing this. Teachers who are daring enough to try something new and not care about their paycheck all the fucking time is godfind, but I can only hope more teachers get into education with that mindset

@Bonniebelle_00__

3 жыл бұрын

seem like limit of thing that are less than

@benja_mint

3 жыл бұрын

australian living and working in germany: i'm always amazed and incredibly jealous when i hear how much better my german colleagues/friends' high school education was., compared to mine

@benja_mint

3 жыл бұрын

@Calum Tatum we also seem to have a big emphasis on sport. Cricket and football are much more important than STEM :p

>19th century versions of Wolverine and the old man from home alone My sides

@Bonniebelle_00__

3 жыл бұрын

gesus

@dsdy1205

3 жыл бұрын

Justice for Hamilton

@Zero_Chaos

3 жыл бұрын

I had to rewind so I could process what he said, and then I paused the video and laughed for like 5 minutes

Outstanding work. Together with Ben, you are setting the standard for how the next generation of educational material should look like. I'm very impressed by your work in general and I didn't imagine it was possible to go so much further. This is so good, I'm still in shock. You are making humanity fundamentally richer. There is no telling how big an impact innovations in education like this one will have in our collective future. I'm proud of being a patron, I just doubled my pledge.

@3blue1brown

5 жыл бұрын

Thanks so much!

If you hold your mouse pointer in between the pi creature's eyes on the interactive video, it goes cross-eyed.

@theredstonehive

4 жыл бұрын

If you put the mouse on the eye pi shuts his eye.

@FinBoyXD

4 жыл бұрын

@@theredstonehive So does Linus the linelander. Btw, the Pi's name is Felix (the flatlander, at least in the 3D explorable video).

@carlos77121

3 жыл бұрын

If you hold the pointer at infinity it goes wall-eyed.

@Bonniebelle_00__

3 жыл бұрын

wow

@nfgallimore

3 жыл бұрын

@@theredstonehive and frowns

2:30 Me trying to tell my prof that singularities are features, not bugs. Also: me, later, trying to tell my parents how an F is actually an A+ in 4D space.

What hyperdimensional aspect ratio should I watch this in?

@icvidz1

5 жыл бұрын

u need to project this video on a 2d plane. its only fitting!

@mateussouza3979

5 жыл бұрын

21:16:10:9.

@elnolde754

3 жыл бұрын

Sorry, but there is only one Answer to this: 42

@Bonniebelle_00__

3 жыл бұрын

im not sure im still learning myself

@scrungozeclown836

3 жыл бұрын

4900 hypervoxels

This is perhaps the highest quality content I've ever seen on the internet, not just on KZread. Absolutely incredible work. I just became a patreon contributor because of this video.

@JunkiMoturi

2 жыл бұрын

no lie

After smashing my head against quaternions for almost a decade, this interactive simulation video has finally put things in some perspective. Furthermore, the format of that platform is so powerful and SO smoothly executed. Bravo, Grant and Ben. 👏 I am in awe!

Being a software programmer, and a mathematician. I can tell the lengths 3b1b went for this video. No one has gone these lengths for a youtube video, I repeat. NO ONE

@ooseven4696

2 жыл бұрын

the source code seems to have 6000+ lines of code, must have been one heavy project

@fizipcfx

10 ай бұрын

to be honest, writing videos with manim quickly becomes hundreds of lines but writing 3d scenes with rotations are wayy too complicated for my dumb ass

You are a living legend. These animations are so cool its amazing. Was worth the wait.

Totally worth the wait.

@Bonniebelle_00__

3 жыл бұрын

absolutely

After watching this and the interactive videos, whenever I think of 3d rotations again, I cannot resist thinking in terms of the quaternions. There is just no other way that is more elegant than this!

This channel just keeps getting better! 3Blue & 1Brown takes a "Why?" And, with logic disarmingly sly, (Plus cool animation And soothing narraration!) Makes the complex as easy as Pi --Best Wishes for Vivid Dreams & ongoing Flashes of Insight

@ffggddss

5 жыл бұрын

Bravo! (Or the hypercomplex?) Fred

@arleyantes9321

3 жыл бұрын

Are you Sprog from reddit? O__0

@jainilsheth7996

2 жыл бұрын

Really cool!

@Skynet_the_AI

Жыл бұрын

Nice

Nowadays your teaching helps me in my other subjects too

I am so happy you've created this. I work in VR and this is invaluable for me.

What a nice video once again! I'm very glad that channels such as yours keep on giving quality maths contents. As a matter of fact, my professor recommended we watch several videos of yours in order to understand math more graphically and geometrically. Hopefully, students that watch your video will become searcher that unravel mathematics because we need this kind of people today. Please, keep up this great work!

Totally worth waiting!! Finally a simpler and more visual friendly approach to quaternions

Mind blown!!! Great job to both, you for the excellent explanations, and Ben for the amazing web development. So worth the wait!

I just did the interactive thing and I feel genuinely enlightened lol. As a hobby gamedev, quaternions have probably been the topic I've avoided most. Like all other topics I feel like I've been able to at least learn something about, but quaternions have always escaped me. I left it to "confusing computer math stuff I can't understand" and just used the functions that convert to and from euler angles. I saw another one of your videos, possibly a livestream, where my mind was blown by the simplicity of using cos(x) + i*sin(x) to represent 2d rotation, but seeing it apply to quaternions, where i just gets replaced with an axis for it to work in 3d is even more mind-blowing. I feel like I actually understand quaternions now, even enough to actually use them too. I cannot express the shear amount of confusion I went through trying to learn about them at first before giving up. This is the by far the best explaination and especially visualization ive seen for them! Awesome work!

The interactive videos are amazing! I finally feel like I have an intuitive grasp of quaternions and hyperspheres...I've been sooo confused for years

A 5 mins video is more clear then whole semester of lectures. Thank you again for providing free knowledge of KZread !!!

I always have to remind my that this channel is not that old because it should have 20 million subscribers! Always worth the wait for your videos because they're a real treat!

You sir deserve a medal. Thank you for providing so valuable content. Keep up the great work!

I have never seen such good educational content as in your colab! This is truly mind blowing. Keep it up, you are an inspiration

You way of explaining concepts with the help of these visualizations and interactive interfaces is very much appreciable...This should be the way of teaching in this advanced and technical world.

I am so happy to be among your Patreon supporters; you are a fantastic educator!

You can find the explorable videos at eater.net/quaternions

@user-ih3eu6ly7s

5 жыл бұрын

i thing i have made a new system for 3d rotation and it doesnt break multiplication edit#contact me in discord miketheking5#0399

@electra_

5 жыл бұрын

He's probably not going to just put it in a pastebin and put it here so the youtube commenters can see

@JorgetePanete

5 жыл бұрын

yep

@dotanuki3371

5 жыл бұрын

Very nice. For the interactive videos, it would be nice if it paused progression until there hasn't been interaction for a while. When you go 'try playing around for a while .. ', and the video continues until the next segment where audio and interaction is played back, it just takes over what the user is currently doing. I get that the user can pause, but the playback could also put itself on hold until the user has not done any input for a while.

@MrLikon7

5 жыл бұрын

I remember the comment suggesting that name

I've never had a good picture of what quaternions were supposed to be doing until now. The explorable video was incredibly helpful. Thank you for putting this together.

You really outdid yourself with this one Sanderson

0:52 "19th century versions of Wolverine and old man from Home Alone" LMFAO

@shi_mo_neta

3 жыл бұрын

Underrated joke

I used to think this those math explanations and visualizations cannot be better, and then, this, truly interactive videos. Just amazing.

Three hours later. Totally epic project! Really trippy to think of the sphere as the stereoscopic projection of the hyper-equator. Really nice to see the analogous behavior comparing it with the projected 2d case playing around with positive and negative real part and seeing the projected pole moving inside out to the equator for positive real part and for negative real part moving from infinity inwards.

keep up the awesome work you do, it just nails it all, really feels like a fight for dignity, love it

@askaramantayev

5 жыл бұрын

just watching it gives so much insight on how the whole works, be it the outside world or inner perception, its all interconnected, its all really ONE with zillion faces

You are a living legend

This is really exceptional! Explorable videos are the best educational tool I've ever seen so far in my life. And they are potentially perfect to use in many more topics. GREAT!!

Wow! That interactive app really brought it home! Fantastic work by both of you! Thanks!!!

Brilliant is bringing on a whole new wave of interactive learning, it's great.

Been trying to wrap my head around this and your interactive videos really got me there. I feel pretty confident about this. Cheers mate

The interactive video thing is absolutely fantastic. Beautifully intuitive.

I binged Ben Eater's videos back in April/May. REALLY worth viewing

Incredible effort in those animations, along with a great explanation. Thank you!

Im in awe of how intuitive this is

You are the best science youtube channel, and that's saying a lot since there's LOTS of great science channels right now :)

Literally searched for this topic less than a week ago. Thanks for posting!

You guys made something incredible with these interactive videos

This is amazing! Had an aha moment during the last interactive video on quaternions and 3d rotation. When you showed how some, but not all, of the rotation of the first quaternion was canceled out by the inverse quaternion.

Can we just appreciate what a smart idea it was to put the first part of the explorable video on KZread so that KZread can recommend it to people?

@faiphei3091

3 жыл бұрын

Although I do still that this video should have more than 500K views

This is one of the best things that has ever happened on the internet, at least talking about math. Thank you!

Absolutely extraordinary teaching mechanism. Well done @3Blue1Brown and to your friend. This was like looking into the future and seeing what education looks like. I'm blown away. And grateful! I'm literally using this in professional work.

Clearly the best youtube channel that there is. Your videos r just amazing. If you had infinite amount of videos I would starve because I cant stop watching them lol. Keep up the good work!

I just can't thank you how much it helped me to understand this topic

This was exceptional, and I can honestly say that this is the first time I felt I truly begun to understand quaternions! Thank you! One note about the interactive videos: Could there be a "zoom" control as well? It would make it PERFECT

It would be great if you covered geometric algebra, which contains both quternions and regular vactor algebra. It seems like the most natural way to encode physics, at least for me.

@haniyasu8236

5 жыл бұрын

YES! GEOMETRIC ALGEBRA IS THE BEST THING

@abhimanyupallavisudhir6007

5 жыл бұрын

It's not. Most of the standard "geometric algebra simplifies physics" claims are just nonsense.

@haniyasu8236

5 жыл бұрын

Well, no, physics almost never concerns itself with specific orientations and so almost never needs quaternions specifically (just like it basically never uses rotation matrices), but when putting the ideas of physics into a computer, they *do* become important and very much help tremendously (just like they do in animation) Furthermore, there are a fair bit of quantities that make a *significant* amount more sense if you think of them using Geometric algebra instead of classic vector algebra. For instance, angular velocity and momentum both are usually done as single numbers when in 2D but somehow magically become vectors in 3D, and while usually not relevant, this system has no good way of being extended into 4 or higher dimensions. However, if you instead think of them as quantities in a _planar_ direction and represent them as Bivectors, it all makes so much more sense. Angular momentum is a "scalar" in 2D, because there is _only_ planar direction, and so all angular momentums must be scalar multiples of that one plane; and it's a "vector" in 3D because every plane (and thus bivector) can be represented as its normal vector. In fact, this even makes angular momentum in 4D make sense (once you look at the math) and even explains some of the really weird results there (like how you can have two completely independent rotations happening at the same time).

@abhimanyupallavisudhir6007

5 жыл бұрын

@Anvil What you're saying about bivectors is correct, but the formalism of *geometric algebra* in particular is not the best way to understand them -- the right formalism is tensor algebra (which is indeed exactly how you represent rotational things like angular momentum and cross products in real physics), where "bivectors" are just antisymmetric rank-2 tensors. As for two independent rotations happening at the same time, I don't think anybody regards that as particularly weird and unintuitive. You have four dimensions, each rotation only affects two of them. Of course you can do two at once -- it's just like how you can do two scalings at once in R2, for instance.

@haniyasu8236

5 жыл бұрын

@Abhimanyu Pallavi Sudhir Yes, I am aware that geometric algebra (or rather Clifford algebra) is just a tensor algebra where the square of a vector is a particular quadratic form. Additionally, I'd definitely agree with you that Geometric algebra is not the end all be all of math and physics. Hell, it can't even do general linear transformations. However, as a formalism, I really don't think it's much of a stretch to say that it makes some things more sense than the default 3D + cross product system, and honestly, it's way more intuitive than tensors. But of course, while I have found in my experience that GA makes things way simpler, there will always be things like moment of inertia that like to defy simplification. (Furthermore, full disclosure, I am definitely not a physicist. I tend to work with physics simulations in particular way more than doing theoretical and high level physics, so it very much may be that in your use case, tensors work significantly better) Also, yes, in hindsight the two rotations at once makes perfect sense, but it's one of those things that is surprising to someone who hasn't seen it before and has only worked with 2D and 3D using only the cross product and very little abstract formalism.

THANK YOU!!!!! I've been trying to figure out quaternions for a long time now. This demonstration really helped! Keep up the good work!

That website is incredible, you guys deserve more media attention

wow, that interactive thing is amazing. It's definitely worth the wait thanks Grant your awesome.

I was just waiting for one more of your amazing videos!!! thanks so much 3B1B

Wait for a video, build suspense, be disappointed that it's short, then get a sweet surprise: it's not just a KZread video. It's an amazing feat of 3Blue1Ben.

my thesis will be using quaternions. Thanks for these videos and the website. Very helpful. I went from no understanding to a decent grasp of the concepts in no time at all.

Waited too long for it but it's so much worth it. Great job by Ben to develop easy to use and intuitive web app to explore this. Thank you, Grant for your amazing efforts

Thank you so much for your interactives videos

Just checked out the explorable videos - so wonderful! You gave me that AHA moment that I wish I had had 30 years ago. I understand quaternions quite well (so I thought) but wasn't clear about what the code was doing that converted them to a 3x3 rotation matrix, but FINALLY I totally get what it's doing!!! BTW - it just goes to show you that you don't necessarily need to know all there is to know to move forward in math, for example, I wrote the math library that includes quaternions and matrix multiplications, points vectors etc. that's at the core of both Maya and AutoCAD, both of which are exposed to 3rd party developers via the API, so if you made a call to such a function, then I wrote, named, designed etc. that code, you're calling. I've taught many folks about quaternions, but NEVER with the insight I've gained from your work Grant! Thank you! I also LOVE your video about Fourier transforms, an I have a goal now to get a handle on quaternion Fourier transforms, I could really use your help! :-)

Great video! I use Quaternions/euler angles almost every day when rotation stuff in a 3D space - but it's still really difficult to understand. So thanks a lot! 👍🤓😍

Grant and Ben Eater are unbelievable smart, talented and generous 🥰 Thanks a ton for sharing your knowledge in such an exceptional high quality and easy way in the public. So that mortals can understand it partially too 😀

I'm actually a second year PhD student working on "quaternion neural networks". I waited for this kind of visualization for year now, i even though of building my own software ... Thanks you so much !

@mathephilia

5 жыл бұрын

Si tu connais pas l'algèbre géométrique frérot: tu vas revoir ta thèse en entier je pense. xd On peut en discuter si tu veux, perso je taffe sur un raytracer non-euclidien fractale avec ça. Chaque sous-espace 2D d'une algèbre géométrique est un plan complexe en natif; chaque sous-espace 4D un truc isomorphe aux quaternions, mais sans quelques-une des pathologies habituelles (notamment les versors qui généralisent les rotors). Après t'as le "geometric calculus" (analyse mutlivectorielle) qui peut te permettre d'aller encore plus loin. Le "fundamental theorem of geometric calculus" permet de retrouver tous les théorèmes intégraux de la physiqye moderne (Stokes, Green) en qqs lignes de preuve. Tu vas kiffer ! www.geometricalgebra.net/

@titouanparcollet5115

5 жыл бұрын

@@mathephilia "Si tu connais pas l'algèbre géométrique" -> est-ce ce que j'ai dis ? Je l'ai juste remercié d'avoir fourni un outil de visualisation qui sera très pratique pour des démonstrations lors de conférences, ou pour de simples discussions entre chercheurs. Donc non, je ne pense pas avoir besoin de revoir ma thèse. Merci quand même pour les infos.

@mathephilia

5 жыл бұрын

@@titouanparcollet5115 C'était bien sûr une exagération dans l'objectif de faire rire: mais ce fut un échec cuisant. xd Aucune condescendance ou mépris n'était sous-entendu dans mon message, tkt. ^^ Mon message en plus clair: au vu des retombées positives de l'algèbre géométrique dans mon propre travail (alors que je me servais des quaternions auparavant), et sachant à quel point peu de gens connaissent ce formalisme, surtout en France et dans le monde francophone, je me suis dit qu'il pourrait t'intéresser dans ton propre travail. J'aimerais personnellement utiliser cet outil pour rendre les espaces statistiques massifs plus facilement compréhensibles, mais ça va demander plus de recherche de ma part, et ce sur plusieurs années. Good luck en tout cas pour la thèse, la soutenance et la suite ! :)

@titouanparcollet5115

5 жыл бұрын

@@mathephilia L'approche était peut être un peu trop agressive pour l'humour ;). Je jetterai un oeil à ce dont tu as parlé.

@mathephilia

5 жыл бұрын

@@titouanparcollet5115 Le ton passe toujours mal à l'écrit, snuf. :'( Je pense que tu vas apprécier, en tout sérieux: c'est très beau. :) Oh, et j'y pense, si t'as la flemme de te farcir le bouquin de 600 pages pour les informaticiens, t'as aussi cette chaîne KZread qui te fait une intro courte du coeur du formalisme et des enjeux liés à celui-ci : kzread.info/dron/ymE67THrWoeTABxzJm1wdg.html (commence par geometric algebra, puis geometric calculus, c'est en gros 5/6 vidéos de 10 minutes pour chaque sujet)

Amazing quality. Please continue.

Love how you mix coding and visualization, keep it on.

that interactive video thing is fucking nuts, I'm in awe

Huge Thanks for all the work You do! Very good explanation!

Really, the Simplest way ever to explain quaternion, I really enjoy how did u grasp the ideas and how did you simplify it, ♥

I've found this video by accident, and I've found your site with interactive demos through it. I think I finally got it. Because quaternion rotates around two 4-dimensional circles, and you only need rotation of one, you use two of them to cancel rotation of the second circle.

Grant, you never fail to amaze me. Thank you.

Yusss!!!11!! Ben Eater!!! Excellent collab! Thanks guys! :-)

The explorable videos are incredible. What a perfect way to make it "click".

really loved this and it helped immensely, thank you very much for creating these fantastic learning resources

I appreciate the video, I'm currently exploring unity game development to practice more C#. Quaternions have come up several times, this video helped clear up what they are exactly. Thanks!

Wow ! This content is amazingly easy to understand ! Thank you !

Thank you. I first learned of quaternions in studying Maxwell's electromagnetic equations as modified by Oliver Heaviside and others. This in the last month or so. Before that, I had no knowledge of quaternion math. I talked with my granddaughter who is a mathematician and she had not heard of them. Please keep at publicizing quaternions. Again, thank you.

This video is pure gold, thank you sir.

You're a legend. The wait was worth

You know, with how awesome your explanations are, I am beginning to feel that one of the biggest difficulties to learning math isn't complex ideas but just the fact that mathematicians suck at writing things down :p Which is to say, there is so much ambiguity and gotcha moments in notations that it just looks like black magic even if you understand the algorythm separately.

Wow that brings learning to a whole new level! Thanks a lot!

Thanks a lot for these videos from someone who does rigging (tech animation) and doesn't really understand the math behind 3d space well enough.

Thanks Grant for this, I badly needed this

What a great idea to make an even more intuitive way to understand complex things like quaternions! I have an exam on robotics and this was all very abstract for me. You're interactive video's really helped me get this topic on a whole new level. Thanks al lot!! Ps I'm always a big fan of you're video's to really understand the meaning of complex mathematics!

Question! During your studies, did you ever study any Control Theory? Like linear algebra, I feel it's a course that many struggle with fully grasping a lot of core concepts. After watching your videos on LA (which cleared up more in 40 minutes than half a year of university) I am just convinced you could do wonders helping students visualize and grasp a lot of core concepts there. Your way of explaining seems vastly superior to most educational channels that I've come across here. Huge kudos from Sweden. Keep this art up.

@Aquelzor

5 жыл бұрын

@@Gonza-lh2vo can't say I disagree.

@rdc6612

2 жыл бұрын

I literally have this exam in three days lol it would be nice

@TheLpd1

Жыл бұрын

YES YES YES

@RugnirSvenstarr

Жыл бұрын

Anyone looking for this I recommend Steve brunton's lecture series here on KZread. Not as high quality as 3b1b but it was great for me

@JeffMTX

Жыл бұрын

@@RugnirSvenstarr Brunton and Nathan Kutz are awesome. I used their (and Peter Schmidt’s) DMD tutelage in my phd thesis

you are the perfect combination of engineer educator and artist.

Unrelated, but your 3d visualizations have gotten better! rewatched the essence of linear algebra series, and the 3d there was stuttery and had unsightly arrows. Very happy to see a creator self-improve

I love you !!! This is the best mathematical lesson I've ever had

I love the work you are doing. Thank you sir.

That's simply amazing: learning linear algebra and at the same time have the possibility to "touch" it...

I will exam on Analytical Mechanics tomorrow and getting stuck to make sense of the orientation of rigid body with quaternions! Thank you so much for the video! Really very helpful!

This seriously helped me understand the concept after I was drowning trying to visualize quaternions on my own.

Been waiting for this FOREVER Nice intro

Thank you so much! I’m a PhD student in biophysics and your videos are extremely valuable to me. Wish you best of luck and great success in all your endeavours.

Learned a lot once again :) Easy to understand and awesome examples!

That explorable video stuff is amazing. I can't imagine the amount of time Ben put into that. Also the little Pi Guy's eyes follow your mouse and if you put the mouse over his eye, he frowns.

Never seen something like that ! really impressive, congratulations ! You should teach teachers to create similar learning tools.

Waited a long time, it was totally worth it