Reorganisation

TestControls.tex

@@ -0,0 +1,58 @@
+%!tikz editor 1.0
+\documentclass{article}
+\usepackage{tikz}
+\usepackage[graphics, active, tightpage]{preview}
+\usepackage{circuitikz}
+\PreviewEnvironment{tikzpicture}
+
+%!tikz preamble begin
+\usepackage{pgfplots}
+\pgfplotsset{compat=1.18}
+%!tikz preamble end
+
+
+\begin{document}
+%!tikz source begin
+\begin{tikzpicture}[scale=3]
+\begin{axis}[ axis lines=middle,
+  xmin=-8, xmax=6,
+  ymin=-8, ymax=4,
+  grid=both,
+  axis equal image]
+
+% ---- obere Schleife ----
+\addplot[thick, blue]
+  plot coordinates {(0,0)}
+  .. controls (5,1) and (5,4) ..
+  (0,4) .. controls (-6,4) and (-6.5,2) .. (-6.5,2)
+  .. controls (-7,-2) and (-7,-2) .. (-5.5,-4);
+ % .. controls (-2,4) and (-2,2) ..
+ % (0,0);
+
+% ---- untere Schleife ----
+%\addplot[thick, blue]
+%  plot coordinates {(0,0)}
+%  .. controls (2,-2) and (2,-4) ..
+%  (0,-4)
+%  .. controls (-2,-4) and (-2,-2) ..
+%  (0,0);
+
+% ---- Punkte markieren ----
+% Hauptpunkte
+\addplot[only marks, mark=*] coordinates {(0,0) (0,4) (0,-4)};
+% Kontrollpunkte
+\addplot[only marks, mark=x, mark options={red}] 
+   coordinates {(2,2) (2,4) (-2,4) (-2,2) (2,-2) (2,-4) (-2,-4) (-2,-2)};
+
+\end{axis}
+%	\draw[help lines] (-3,-2) grid (8,3);
+%	\draw[thick] (-2,0) .. controls (-2.5,2) and (-1.5,3) .. (0,2.5)
+%	.. controls (2,2) and (1.5,0.7) .. (-0.5,1)
+	%.. controls (-0.3,0.5) and (-0.6,-0.5) ..(-0.6,-1)
+	%.. controls (-1.5,-1.5) and (-2,-1) .. (-2,0);
+	%\draw[thick] (2,2.5) .. controls (3.5,1.5) and (2.5,-1.5) .. (1,-1)
+	%.. controls (-0.5,-0.2) and (1,1.8) .. (2,2.5);
+\end{tikzpicture}
+%!tikz source end
+
+\end{document}