Merge branch 'master' into master

1 files changed, 51 insertions, 0 deletions

diff --git a/buch/papers/clifford/3d/dq.tex b/buch/papers/clifford/3d/dq.tex
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+++ b/buch/papers/clifford/3d/dq.tex
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+%
+% dq.tex
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\documentclass[tikz]{standalone}
+\usepackage{times}
+\usepackage{amsmath}
+\usepackage{txfonts}
+\usepackage[utf8]{inputenc}
+\usepackage{graphics}
+\usetikzlibrary{arrows,intersections,math}
+\usepackage{ifthen}
+\begin{document}
+
+\definecolor{darkred}{rgb}{0.7,0,0}
+
+\newboolean{showgrid}
+\setboolean{showgrid}{false}
+\def\breite{6}
+\def\hoehe{6}
+
+\begin{tikzpicture}[>=latex,thick]
+
+% Povray Bild
+\node at (0,0) {\includegraphics[width=12cm]{dq.jpg}};
+
+% Gitter
+\ifthenelse{\boolean{showgrid}}{
+\draw[step=0.1,line width=0.1pt] (-\breite,-\hoehe) grid (\breite, \hoehe);
+\draw[step=0.5,line width=0.4pt] (-\breite,-\hoehe) grid (\breite, \hoehe);
+\draw                            (-\breite,-\hoehe) grid (\breite, \hoehe);
+\fill (0,0) circle[radius=0.05];
+}{}
+
+\node at (-2.8,-2.7) {$O$};
+\node at (4.7,-3.4) {$a_1$};
+\node at (-2.6,5.2) {$a_2$};
+\fill[color=white,opacity=0.7] ({-5.7-0.25},{-4.8-0.15}) rectangle ({-5.7+0.25},{-4.8+0.2});
+\node at (-5.7,-4.8) {$a_3$};
+
+\node[color=blue] at (-3.6,0.8) {$y\mathbf{e}_{23}$};
+\node[color=blue] at (2.1,0.9) {$x\mathbf{e}_{12}$};
+\node[color=blue] at (1.3,-3.7) {$z\mathbf{e}_{13}$};
+
+\node[color=darkred] at (1.3,0.4) {$\vec{q}$};
+
+\end{tikzpicture}
+
+\end{document}
+