Let's remove quaternions from every 3D engine (2018)

Re:Let's remove quaternions from every 3D engine (2018) by alpineidyll3 on Friday January 31, 2020 @09:15AM (#22201802)

The author is missing a huge very real advantage of quaternions, that they are smooth functions of thier parameters and don't suffer from gymbal lock singularities. All 3d representions do, as can be shown with the math this guy is too lazybrained to do.

That really matters for defining smooth paths, quaternions simply have the right topology and rotations don't.

[ Parent | on HN ]

Re:Let's remove quaternions from every 3D engine (2018) by eigenspace on Friday January 31, 2020 @09:26AM (#22201877)

The author is using geometric algebra to create mathematical objects with all the same properties as quaternions, but to explain and understand them in a more comprehensive, sensible way. These things have all the same rotational properties as quaternions.

In particular, he’s explaining that quaternions are not vectors, they’re actually oriented planes and showing how their multiplication rules arise in a way that’s not ‘out of thin air’.

[ Parent | on HN ]

Re:Let's remove quaternions from every 3D engine (2018) by moultano on Friday January 31, 2020 @09:23AM (#22201854)

You should read the article before commenting.

[ Parent | on HN ]

Re:Let's remove quaternions from every 3D engine (2018) by nmca on Friday January 31, 2020 @09:21AM (#22201839)

Did you read the article? Irrc you can lerp rotors and the results are smooth and interpretable...

[ Parent | on HN ]