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%
% eulerspirale.tex -- Darstellung der Eulerspirale
%
% (c) 2022 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}
\definecolor{darkgreen}{rgb}{0,0.6,0}
\begin{tikzpicture}[>=latex,thick,scale=\skala]
\input{eulerpath.tex}
\def\s{8}
\begin{scope}[scale=\s]
\draw[color=blue] (-0.5,-0.5) rectangle (0.5,0.5);
\draw[color=darkgreen,line width=1.4pt] \fresnela;
\draw[color=darkgreen,line width=1.4pt] \fresnelb;
\fill[color=blue] (0.5,0.5) circle[radius={0.1/\s}];
\fill[color=blue] (-0.5,-0.5) circle[radius={0.1/\s}];
\draw (-0.5,{-0.05/\s}) -- (-0.5,{0.05/\s});
\draw (0.5,{-0.05/\s}) -- (0.5,{-0.05/\s});
\node at (-0.5,0) [above left] {$\frac12$};
\node at (0.5,0) [below right] {$\frac12$};
\node at (0,-0.5) [below right] {$\frac12$};
\node at (0,0.5) [above left] {$\frac12$};
\end{scope}
\draw[->] (-6.7,0) -- (6.9,0) coordinate[label={$C(x)$}];;
\draw[->] (0,-5.8) -- (0,6.1) coordinate[label={left:$S(x)$}];;
\end{tikzpicture}
\end{document}
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