Let's remove quaternions from every 3D engine (2018)
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HN comment order> As a side note, Geometric Algebra contains more than just Rotors, and is a very useful tool to have in one's toolbox. I worked in a game engine where a pair of mathy programmers fell in love with Geometric Algebra, and use this same argument that quarternions ought to be replaced to overhaul all of the math code in the engine using Geometric Algebra. The character rigging system removed matrices and used GA instead. This caused several large problems…
100% agree that bivectors are an easier to way to think about quaternions with less magical hand-waving. However, I have an opinion that feels important which I like to post whenever geometric algebra comes up: Just because multivectors are intuitively superior doesn't mean GA is a solved pedagogical solution to rotations. It is itself very strange and unintuitive. In particular there is no satisfying explanation for what the geometric product means that I'm aware of (and I have read more-or-less…
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- Breakout years
- 2
- Total points
- 819
- Total comments
- 367
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking
Every submission
| Date | Title as submitted | By | Points | Comments |
|---|---|---|---|---|
| 2020-01-31 | Let's remove quaternions from every 3D engine (2018)First breakout · Best thread | lelf | 627 | 326 |
| 2021-06-02 | Let's remove Quaternions from every 3D Engine | TeeMassive | 8 | 0 |
| 2021-12-10 | Let's remove Quaternions from every 3D Engine (2018) | kilovoltaire | 145 | 38 |
| 2025-04-16 | An interactive introduction to rotors from geometric algebra (2018)Latest 20+ point return | kjeetgill | 39 | 3 |