From 3d288f1e437611757ee07c84cc03cd70f216f4c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20M=C3=BCller?= <andreas.mueller@ost.ch>
Date: Mon, 13 Sep 2021 13:08:03 +0200
Subject: various cover variants

---
 cover/matrix2.tex | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 cover/matrix2.tex

(limited to 'cover/matrix2.tex')

diff --git a/cover/matrix2.tex b/cover/matrix2.tex
new file mode 100644
index 0000000..a39b493
--- /dev/null
+++ b/cover/matrix2.tex
@@ -0,0 +1,67 @@
+%
+% matrix.tex -- Hintergrund für Bucheinband
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\documentclass[tikz]{standalone}
+\usepackage{amsmath}
+\usepackage{times}
+\usepackage{txfonts}
+\usepackage{pgfplots}
+\usepackage{csvsimple}
+\usetikzlibrary{arrows,intersections,math}
+\begin{document}
+\def\skala{1}
+\begin{tikzpicture}[>=latex,thick,scale=\skala]
+
+\def\w{30}
+\def\h{10}
+\def\l{7}
+\def\s{0.22}
+\def\vs{0.27}
+
+\fill[color=blue] (0,{-0.3*\h}) rectangle (\w,{2*\h});
+
+% #1 = x coordinate
+% #2 = scale factor
+\def\verticalline#1#2{
+	\pgfmathparse{int(random(0,\h/\vs))*\vs}
+	\xdef\initialheight{\pgfmathresult}
+	\foreach \y in {0,\vs,...,\l}{
+		\pgfmathparse{100*(1-(sqrt(\y/\l)))}
+		\xdef\farbe{\pgfmathresult}
+		\pgfmathparse{int(random(0,9))}
+		\xdef\zeichen{\pgfmathresult}
+		\node[color=white!\farbe!blue,opacity={(1-\y/\l)},scale=#2]
+		%\node[color=white!\farbe!blue]
+			at (#1,{\initialheight+\y*(#2)}) {\tt\zeichen};
+	}
+}
+
+% #1 = width
+% #2 = scalefactor
+\def\verticallines#1#2{
+	\pgfmathparse{int(#1/(#2*\s))}
+	\xdef\xlimit{\pgfmathresult}
+	\foreach \x in {0,1,...,\xlimit}{
+		\pgfmathparse{\x*\s*(#2)}
+		\xdef\X{\pgfmathresult}
+		\verticalline{\X}{#2}
+	}
+}
+
+\begin{scope}
+\clip (0,{-0.3*\h}) rectangle (\w,{2*\h});
+\def\W{10}
+
+\verticallines{\W}{0.5}
+\verticallines{\W}{0.7}
+\verticallines{\W}{1.0}
+\verticallines{\W}{1.4}
+\verticallines{\W}{2}
+
+\end{scope}
+
+\end{tikzpicture}
+\end{document}
+
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