Difference between revisions of "Quat2anax.m"

Revision as of 14:36, 26 December 2018

Converts a quaternion into angle-axis rotation parameters.

    [rot_axis,rot_angle]=quat2anax(q)

    q   -   quaternion, a structure with four fields
            q.u, q.i, q.j, q.k giving the four compo-
            nents of the quaternion

    rot_axis  - cartesian direction vector as a row 
                with three real elements

    rot_angle - rotation angle in radians

See the notes on rotation conventions for the basic definitions of rotations in Spinach.

@@ Line 1: / Line 1: @@
-Converts a quaternion into angle-axis rotation parameters. Syntax:
+{{DISPLAYTITLE:quat2anax.m}} __NOTOC__
+Converts a quaternion into angle-axis rotation parameters.
-                 [rot_axis,rot_angle]=quat2anax(q)
+==Syntax==
-where q is a structure with four fields q.u, q.i, q.j, q.k giving the four components of the quaternion. Output:
+     [rot_axis,rot_angle]=quat2anax(q)
-    rot_axis - cartesian direction vector given as a row or column
+==Arguments==
-               with three real elements
-   rot_angle - rotation angle in radians
+     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==
+Links to related functions.
+''Version 2.3, authors: [[Ilya Kuprov]]''