Maths - Conversion Matrix to Axis Angle - Correction from Grant Hutchison

By: granthutchison ( Grant Hutchison )
file Matrix to Rotation Angle error?  
2003-07-01 00:01

Hello:
Relevant page is:
https://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm

When normalizing the vector components you divide by
(m21-m12)^2+(m02-m20)^2+(m10-m01)^2

Since the magnitude of the vector is the *square root* of this quantity, it seems to me that you should divide by
sqrt[(m21-m12)^2+(m02-m20)^2+(m10-m01)^2]
Yes?

Grant Hutchison

By: martinbaker ( Martin Baker )
file RE: Matrix to Rotation Angle error?  
2003-07-01 17:08

Grant,

Yes!

Thank you very much for letting me know, I have corrected the web page.

Martin
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