# latex-pictures

A collection of TikZ drawings and other images 🖌️

## unit-circle-covering.tikz (1106B)

 1 % This picture represents the universal convering of the unit circle
2 % Copyright Pablo (C) 2021
3 \begin{tikzpicture}[scale=0.75]
4 \begin{scope}[shift={(-3.5, -2.75)}]
5     \begin{axis}[
6         view={0}{60},
7         axis lines=none,
8         ymin=-2,
9         ymax=.5,
10         xmin=-1,
11         xmax=1
12       ]
14           very thick,
15           domain=-1.25*pi:6.25*pi,
16           samples = 200,
17           samples y=0
18         ]
19           ({0.25 * sin(deg(-x))}, {0.17 * cos(deg(-x))}, {-x});
20
22           very thick,
23           dotted,
24           domain=-1.5*pi:-1.25*pi,
25           samples = 200,
26           samples y=0
27         ]
28           ({0.25 * sin(deg(-x))}, {0.17 * cos(deg(-x))}, {-x});
29
31           very thick,
32           dotted,
33           domain=6.25*pi:6.5*pi,
34           samples = 200,
35           samples y=0
36         ]
37           ({0.25 * sin(deg(-x))}, {0.17 * cos(deg(-x))}, {-x});
38     \end{axis}
39 \end{scope}
40
41 \draw[thick, ->] (0, 0) -- node[right]{$\pi$} (0, -1);
42 \draw[thick] (0, -1.5) ellipse (0.9 and 0.25);
43 \end{tikzpicture}