Difference between revisions of "Quat2anax.m"
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[rot_axis,rot_angle]=quat2anax(q) | [rot_axis,rot_angle]=quat2anax(q) | ||
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q - quaternion, a structure with four fields | q - quaternion, a structure with four fields | ||
Revision as of 18:51, 5 June 2026
Converts a quaternion representation of a rotation into angle-axis rotation parameters.
Syntax
[rot_axis,rot_angle]=quat2anax(q)
Parameters
q - quaternion, a structure with four fields
q.u, q.i, q.j, q.k giving the four compo-
nents of the quaternion
Outputs
rot_axis - cartesian direction vector as a row
with three real elements
rot_angle - rotation angle in radians
Notes
See the notes on rotation conventions for the basic definitions of rotations in Spinach.
See also
euler2dcm.m, wigner.m, anax2quat.m
Version 2.3, authors: Ilya Kuprov
