<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - Cannot rotate input touchscreen with Xorg + libinput" href="https://bugs.freedesktop.org/show_bug.cgi?id=90007#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - Cannot rotate input touchscreen with Xorg + libinput" href="https://bugs.freedesktop.org/show_bug.cgi?id=90007">bug 90007</a> from <a class="email" href="mailto:eric.brunet@lps.ens.fr" title="Éric Brunet <eric.brunet@lps.ens.fr>"> Éric Brunet</a> <pre>Created <a href="attachment.cgi?id=115125" name="attach_115125" title="Updating of the man page of xf86-input-libinput.">attachment 115125</a> <a href="attachment.cgi?id=115125&action=edit" title="Updating of the man page of xf86-input-libinput.">[details]</a> <a href='page.cgi?id=splinter.html&bug=90007&attachment=115125'>[review]</a> Updating of the man page of xf86-input-libinput. Ho... Thanks for the link! I have been doing too much math lately. I saw a 3x3 matrix called InputCoordinateTransformation, and I thought (without checking, my bad) that it was transforming 3D coordinates (x,y,z) => (x',y',z') = M (x,y,z) in anticipation of future fancy input methods... The transformation is instead (x,y) => (x',y') = M (x,y) + (x0,y0) I think I would have guessed if the matrix had been 3x2 instead of 3x3, and I am still confused about the meaning of the third row, but at least I can now rotate my screen as I want. May I suggest updating the man page of the xf86 libinput driver to explain this? The interface is neither intuitive nor user-friendly, and documentation is always good. I am attaching a patch to this effect.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>