如何用 TikZ 绘制地图

Question

因此，我想使用 TikZ 绘制一个图形，用于将 g 从 n-1-2 顶点映射到任意其他顶点的任意二面体群。现在，我在 Paint 中绘制了一幅非常糟糕的图画，我将附上它以展示我的意图。任何帮助都将不胜感激。

Answer 1

两个选项，取决于所需的箭头：

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}

\begin{document}

\[
\begin{tikzpicture}[baseline=(current bounding box.center)]
\draw
  (0,0) node[above] {$n$} -- 
  ++(45:1.5cm) node[above] {$1$} -- 
  ++(0:1.5cm) node[above] {$2$};
\node[label={above:$g$}] at (4,0.5) {$\Rightarrow$};
\draw
  (5,0) node[below] {$i+1$} -- 
  ++(10:1.5cm) node[below] {$i$} -- 
  ++(50:1.5cm) node[right] {$i-1$} ;
\end{tikzpicture}
\]

\end{document}

或者用单箭头：

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}
\usetikzlibrary{shapes.arrows}

\begin{document}

\[
\begin{tikzpicture}[baseline=(current bounding box.center)]
\draw
  (0,0) node[above] {$n$} -- 
  ++(45:1.5cm) node[above] {$1$} -- 
  ++(0:1.5cm) node[above] {$2$};
\node[draw,single arrow,label={above:$g$},text width=1cm] at (4,0.5) {};
\draw
  (5.5,0) node[below] {$i+1$} -- 
  ++(10:1.5cm) node[below] {$i$} -- 
  ++(50:1.5cm) node[right] {$i-1$} ;
\end{tikzpicture}
\]

\end{document}

Answer 2

示例（在数学中设置箭头部分）：

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}

\begin{document}
\[
  \vcenter{\hbox{%
    \tikz\draw[thick, node font=\scriptsize]
      (-135:1) node[above left] {$n$}
      -- (0, 0) node[above left] {$1$}
      -- (1, 0) node[above] {$2$};%
  }}
  \stackrel{g}{\Rightarrow}
  \vcenter{\hbox{%
    \tikz\draw[thick, node font=\scriptsize]
      (-190:1) node[below] {$i+1$}
      -- (0, 0) node[below] {$i$}
      -- (45:1) node[right] {$i-1$};%
  }}
\]
\end{document}

该构造只是根据当前数学轴\vcenter{\hbox{...}}将材料垂直居中。...