https://spindynamics.org/wiki/index.php?action=history&feed=atom&title=Qter2dcm.m 2026-10-02T11:47:11Z Revision history for this page on the wiki MediaWiki 1.31.15 https://spindynamics.org/wiki/index.php?title=Qter2dcm.m&diff=10275&oldid=prev 2026-08-30T09:12:45Z

<p>version fragment to 2.13 per IK 2026-08-30</p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 09:12, 30 August 2026</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l26" >Line 26:</td> <td colspan="2" class="diff-lineno">Line 26:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[dcm2qter.m]], [[qter2euler.m]], [[euler2qter.m]], [[euler2dcm.m]], [[anax2quat.m]], [[quat2anax.m]], [[Rotation conventions]]</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[dcm2qter.m]], [[qter2euler.m]], [[euler2qter.m]], [[euler2dcm.m]], [[anax2quat.m]], [[quat2anax.m]], [[Rotation conventions]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>''Version 2.<del class="diffchange diffchange-inline">11</del>, authors: [[Ilya Kuprov]]''</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>''Version 2.<ins class="diffchange diffchange-inline">13</ins>, authors: [[Ilya Kuprov]]''</div></td></tr> </table>

Kuprov https://spindynamics.org/wiki/index.php?title=Qter2dcm.m&diff=10116&oldid=prev 2026-08-30T08:13:17Z

<p>sync with Spinach main f053e432: new page for quaternion to direction cosine matrix conversion</p> <p><b>New page</b></p><div>{{DISPLAYTITLE:qter2dcm.m}} __NOTOC__<br /> Converts a unit quaternion into a direction cosine matrix in the active convention, matching the one used by [[euler2dcm.m]] function. The quaternion is divided by its Euclidean norm before the matrix is assembled from the standard bilinear combinations of the components, so that inputs that are only approximately normalised are accepted.<br /> <br /> ==Syntax==<br /> <br /> dcm=qter2dcm(q)<br /> <br /> ==Parameters==<br /> <br /> q - structure with four scalar fields q.u, q.i, q.j,<br /> q.k giving the four components of the quaternion<br /> <br /> ==Outputs==<br /> <br /> dcm - directional cosine matrix<br /> <br /> ==Notes==<br /> The resulting rotation matrix is to be used as follows:<br /> <br /> v=R*v (for 3x1 vectors)<br /> A=R*A*R' (for 3x3 interaction tensors)<br /> <br /> Matlab's Aerospace Toolbox quat2dcm() returns the transpose of this matrix for the same quaternion.<br /> <br /> ==See also==<br /> [[dcm2qter.m]], [[qter2euler.m]], [[euler2qter.m]], [[euler2dcm.m]], [[anax2quat.m]], [[quat2anax.m]], [[Rotation conventions]]<br /> <br /> ''Version 2.11, authors: [[Ilya Kuprov]]''</div>

Kuprov