How Quaternions encode rotations: derivation and sample code

Re:How Quaternions encode rotations: derivation and sample code by chombier on Wednesday September 07, 2016 @08:36AM (#12442818)

I think you can do that using two rotation axis only (cf. proper Euler angles).

And quaternions are made of two complex numbers.

edit: typo.

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Re:How Quaternions encode rotations: derivation and sample code by Kristine1975 on Wednesday September 07, 2016 @09:32AM (#12443204)

>And quaternions are made of two complex numbers.

I don't pretend to grok quaternions (I only use them), but I'm fairly sure a quaternion consists of three imaginary numbers plus a real number.

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Re:How Quaternions encode rotations: derivation and sample code by chombier on Wednesday September 07, 2016 @10:16AM (#12443543)

Sure, but the way they play together can also be expressed by the means of two complex numbers (which makes 4 real numbers in total).

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Re:How Quaternions encode rotations: derivation and sample code by jblow on Saturday September 10, 2016 @02:28PM (#12470342)

This is not true. You can't factor a quaternion into two complex numbers. Please don't spread misinformation.

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