Michael Eggers 🇺🇦🇪🇺
Who *actually* understood Quaternions for real? I can work with them, but I never quite really understood them.
Can someone point me to a good resource that explain them, well, intuitively?
Mar 25 at 12:02pmWeb
Show threadLauraMar 25
@pythno https://eater.net/quaternions
Visualizing quaternions | Ben Eater

Explaining how quaternions, a four-dimensional number system, describe 3d rotation.

Show threadLauraMar 25
@pythno Full disclosure: whenever I try to use my understanding of quaternions to manipulate one, I always end up doing something wrong. Treating them as meaningless numbers works best.
Show threadMichael Eggers 🇺🇦🇪🇺Mar 25
@landelare Hahaha. Same here. Trying to change that.
Show threadJari Komppa 🇫🇮Mar 25
@pythno I think Freya did a video on them, after everybody kept asking.
Show threadJari Komppa 🇫🇮Mar 25
@pythno May have been this https://www.youtube.com/watch?v=htYh-Tq7ZBI
Why can't you multiply vectors?

YouTube
Show threadJari Komppa 🇫🇮Mar 25
@pythno yep, that's the one
Show threadMichael Eggers 🇺🇦🇪🇺5d ago
@sol_hsa Just came to back to say thanks again. Watched it and both of her videos on the topic are super good. Got me closer than ever. Just going to give them a rewatch. I like that she does the x->y->z->x cycle and explicitly calling it the zx plane. That alone is very useful in the field. Also I agree with her that CCW and CW don't really make too much sense.
Show threadMichael Eggers 🇺🇦🇪🇺Mar 25
@sol_hsa uh, nice. Thanks!!!
Show threadJari Komppa 🇫🇮Mar 25
@pythno but wait, there's more! https://www.youtube.com/watch?v=PMvIWws8WEo
Quaternions - Freya Holmer | NGJ2025

YouTube
Show threadMichael Eggers 🇺🇦🇪🇺Mar 25
@sol_hsa Ah thank you so much. That will be my after work watch this evening. Looking forward to it.
Show threadJari Komppa 🇫🇮Mar 25
@pythno Make sure to look up Freya's spline videos as well if you haven't seen them. Great stuff.
Show threadMichael Eggers 🇺🇦🇪🇺Mar 25
@sol_hsa Yup, I know her from that video.
Show threadDag Ågren ↙︎↙︎↙︎Mar 25

@sol_hsa @pythno This is one of the best videos.

Just, in general.

Show threadMarc B. ReynoldsMar 25
@sol_hsa @pythno I've never watched this video but I think the "easiest" way is to start with complex numbers and seeing how it's a "simple" extension. Sadly I don't know of any good write up that do this however.
Show threadYoraMar 25
@pythno Quaternion is a geological period, right?
Show threadGDC Presentation ReviewsMar 25

@pythno

I found this very good: https://gdcvault.com/play/1017653/Math-for-Game-Programmers-Understanding

Math for Game Programmers: Understanding Quaternions

Over the past ten years the complexity of many games has increased, and with that so has the knowledge needed to create them. Creating the latest code for graphics, animation, physical simulation, even to some extent artificial intelligence...

Show threadMichael Eggers 🇺🇦🇪🇺5d ago
@GDCPresoReviews Oh thanks! I didn't know that. I have his book ;)
Show threadFlorianMar 25
@pythno https://m.youtube.com/watch?v=en2QcehKJd8 or, as it is archived in my brain: “the gdc cow dude math video”. And I’m pretty sure Freya Holmer covered the topic as well.
Math in Game Development Summit: A Visual Guide to Quaternions and Dual Quaternions

YouTube