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Fantastic Quaternions - Numberphile
About this video
Numberphile's James Grime introduces quaternions, a type of number beyond the complex numbers, building up from real and complex numbers and explaining why they are useful.
Why it appears in the archive
HN recommends it as the simplest, most approachable introduction to quaternions, useful for people working in games and robotics.
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From the Hacker News discussion
Kalid - also your explanation of complex numbers is absolutely amazing. Sure I could manipulate them by memorizing rules, but I never really knew what they meant or why they were important. I also love the Numberphile explanation of quaternions (building up from real to complex numbers, etc.) - [VIDEO] -Sujan
Read original comment ↗Numberphile's explanation of Quaternions is the simplest I have seen so far: [VIDEO] Quaternions are very important to know if you are doing any kind of 3D math. For instance, game programming or SLAM for robotics.
Read original comment ↗This video might be easier to grasp: Fantastic Quaternions - Numberphile [VIDEO] It also helped me to have a use-case in mind —- a motivation. Like maybe using the accelerometer/compasss in your phone to perform image stabilization or AR.
Read original comment ↗