Re^2: Perl and Quaternions

Uff, that's not the usual quaternion!

Actually, it is; quaternions are often used to represent rotations.

Comment on Re^2: Perl and Quaternions

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Re^3: Perl and Quaternions by salva (Canon) on May 08, 2014 at 10:21 UTC
Oh, ok, I got confused because of the X, Y names. 2D and 3D coordinates are promoted to quaternions as `{0, x, y, z}` and seeing `{x, 0, 0, y}` didn't feel right! In any case, for 2D rotations, quaternions are overkill. You can just use complex numbers.	[reply] [d/l] [select]