How to Use Quaternions

If you need to work with 3D rotations for graphics, game development, robotics, and other applications – this video is very useful for you. This mathematical object makes operations with an orientation of a 3-dimensional object very easy and efficient. You will learn all you need to know about quaternions and how to use them for 3D rotations. After watching this video you will know enough even to implement quaternions in your own software!

[drobin]

This is by far the best explanation for quaternions in 3d graphics I have found! The justification to abandon Euler angles is also straight forward, no useless talk about gimble lock. Thank you!

[AISHWARYMAHAJAN]

By far the best explanation of quaternions Spent a month looking and learning about it on different YouTube videos, even the 3blue1brown. No history lessons, no gimble lock. straight to the point. Keep up the SIMPLE and BEST video.

[stevewhitt]

You are the very first to give a clear explanation of why computer graphics tech prefer Quaternions. Thanks. This I finally understand.

[raketenolli]

Thanks a lot, especially the part about rotation speeds is very helpful, combined with what you had said about combining rotations in global and local reference frames.

[annadyakonova]

This is great! Very well explained and beautifully visualized

[OfcGatormanJones]

this is very much over my head in understanding but its awesome to hear you talk about quaternions!

[PatrickOfTheWrecks]

The best explanation of quaternions I have seen so far. It really clicked for me. Thank you for the work!

[alexanderokak]

What a useful + funny video! Me and a friend in robotics greatly appreciate this video.

[thunderstrike]

very helpful! allowed me to fix a bug ive been struggling with for a while

[Korea-Lens]

you helped me understand what it is in first minute, after I couldn't really grasp it after watching 3blue1brown video of 30min. tyvm

[ihbarddx]

This might be enough for a first toehold in the subject!

[redpandawithbandana]

Finally it clicked! Thank you so much.

[erminioottone]

Amazing, finally a video easy to understand about quaternions

[zixuanyu]

I was just in Blender when I downloaded a plane from Sketchfab that's on Quaterions. I thought some weird deformation is going to occur when I rotate 1 certain axis, (as expected from those random 4D videos) but everything is normal except that the values are behaving a "bit non-linear".

From your video, I learned why.

[zyris]

There are a lot of words used in these videos that are only known by mathematically literate people. So I feel like I should understand and want to, but I don't. At 2:06 two equations appear and I am told they are "scalar vectors". The information content for me at that moment is zero. What would I need to study for this to have any meaning to me? Do I have to know these things to use quaternions in Blender?

[simonesslemont]

I used quaternions for a car wheel. I could separate the expected roll angle for that frame and the steer angle, Then combine them as a single rotation. I would “zero” the rotation by finding its inverse, make the steering angle change, then roll change, then reapply the inverse of the inverse.

[hayfahvytsen]

'Have a nice day and please don't use Euler angles.' LOL. Awesome. 👍

[ayenewyihune]

Ohh I was thinking I will never understand this. Now...I'm much better. Thank you

[zdspider]

5:07 I don't understand how _theta_ and _-theta_ are the same angle ( or _q_ same as _-q_ ). That doesn't make sense.
*Edit:* Oh, because V and -V point in the opposite directions. Okay. So rotating in the opposite direction when the axis vector is inverted, actually results in the same rotation. Now I think I get it.

[drancerd]

I need more! All others videos are copypaste of the sames videos and "papers", no one teach how to use them.

I need it for physics.