Hi Sergio -- Thanks for taking a look at the Q-ray coordinates!
You're right about many bridges to crystallography in this neighborhood. I'm part of a tiny subculture that came up with Q-rays in a listserv long ago. http://mathforum.org/library/view/6236.html It's not that I'm the only one familiar with the ideas or that I'm the only contributor, just I know of no one else bringing it to the attention of a pre-college class, and I do that only rarely. The connection with Python is a Quadray class is implemented therein. My friend Tom has them in C++ (see Wikipedia). https://github.com/4dsolutions/Python5/blob/master/QuadraysJN.ipynb I've also dabbled in a Clojure version. https://github.com/4dsolutions/synmods/blob/master/qrays.clj I worked with Quaternions a long time ago, to do a rotating cube applet, but then applets became a deprecated technology, much to everyone's surprise and consternation. http://4dsolutions.net/ocn/oopalgebra.html Kirby On Tue, Jun 19, 2018 at 12:14 PM, Sergio Rojas <sergi...@mail.com> wrote: > Kirby, > > Looking way far in the back of my head, > the closest thing (to the inspirational drawings of > your notebook) I could recover > is what is called fundamental lattice structures of > solid state physics. Not sure, but in there > they might use your coordinate system to better describe > structures of crystals. > The book by Kittel, pg 27 of the 8th Edition, has some stuff on it. > > Other object in that sense is the Quaternion thing > https://en.wikipedia.org/wiki/Quaternion > > Better stop here, I am getting hurt ... > > Sergio > >
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