如何在 Tikz 中用 T 从内部线条创建圆形节点？T 将节点拆分为 3 个扇区

Question

我想创建 3 个扇形圆节点。参见下图

扇区由线界定

Answer 1

更新 2

我认为比我的第一个版本更好的是使用样式。我在上次更新中添加了修改内部节点样式的可能性。

\documentclass[11pt]{scrartcl}
\usepackage{tikz}
%\usetikzlibrary{shapes} now not necessary
\begin{document}

\tikzset{sectors/.style n args={5}{%
  circle,
  draw,
  minimum width=#4,
  append after command={%
  \pgfextra{ %
   \draw (\tikzlastnode.center) -- (\tikzlastnode.south) ;
   \draw (\tikzlastnode.west)   -- (\tikzlastnode.east) ;
   \path (\tikzlastnode.center) -- node[#5] {#1} (\tikzlastnode.north);  
   \path (\tikzlastnode.center) -- node[#5] {#2} (\tikzlastnode.south west); 
   \path (\tikzlastnode.center) -- node[#5] {#3} (\tikzlastnode.south east); } }}}

\begin{tikzpicture}[ultra thick]
  \node [sectors={1}{2}{3}{4cm}{font=\Huge\bfseries,text=red}]  (c)  {};
\end{tikzpicture}

\end{document} 

另一个想法

\documentclass[11pt]{scrartcl}
\usepackage{tikz}
\usetikzlibrary{shapes}
\begin{document}

\begin{tikzpicture}[ultra thick]
  \node [circle split,
         draw,
         minimum width=4cm,
         append after command={%
         \pgfextra{\draw (\tikzlastnode.center) -- (\tikzlastnode.south) ;
                  } 
                  }]  (c)  {};
  \node[yshift=2em] at (c.center) {\huge \textbf{1}};  
  \node[xshift=-2em,yshift=-2em] at (c.center) {\huge \textbf{2}}; 
  \node[xshift= 2em,yshift=-2em] at (c.center) {\huge \textbf{3}};  
\end{tikzpicture}

\end{document} 

Answer 2

你可以做这样的事情：

\documentclass{article}
\usepackage{tikz}

\newlength\radius
\setlength\radius{7mm}

\begin{document}

\begin{tikzpicture}
\draw circle (\radius);
\draw +(-\radius,0) -- +(\radius,0);
\draw +(0,-\radius) -- +(0,0);
\node[font=\Large\sffamily] at (0,0.5\radius) {1};
\node[font=\Large\sffamily] at (-0.35\radius,-0.5\radius) {2};
\node[font=\Large\sffamily] at (0.35\radius,-0.5\radius) {3};
\end{tikzpicture}

\end{document}

现在我重新阅读了这个问题，我发现你想要使用 \node 来表示圆圈，所以这里有一些使用 \node 的可能解决方案：

\documentclass{article}
\usepackage{tikz}

\newlength\diam
\setlength\diam{14mm}

\begin{document}

\begin{tikzpicture}
\node[draw,circle,inner sep=0pt,minimum width=\diam] (circ) {};
\draw (circ.180) -- (circ.0);
\draw (circ.270) -- +(0,0.5\diam);
\node[font=\Large\sffamily,yshift=0.25\diam] at (circ.center) {1};
\node[font=\Large\sffamily,xshift=-0.18\diam,yshift=-0.25\diam] {2};
\node[font=\Large\sffamily,xshift=0.18\diam,yshift=-0.25\diam] {3};
\end{tikzpicture}

\end{document}

Answer 3

这里有两个解决方案：第一个解决方案直接源自 Gonzalo Medina 的解决方案。第二个解决方案使用更“稳健”的技术（通过fit库）：材料不得超出圆周。

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning,fit}

\begin{document}
\begin{tikzpicture}
  \node[draw,circle,inner sep=0pt,minimum width=3.5em] (circ) {};
  \draw (circ.180) -- (circ.0);
  \draw (circ.270) -- (circ.center);
  \path (circ.center) -- node{1}(circ.90);
  \path (circ.center) -- node{2}(circ.-135);
  \path (circ.center) -- node{3}(circ.-45);
\end{tikzpicture}
\begin{tikzpicture}
  \coordinate (center) at (0,0);
  \node[above=0mm of center](p1){1};
  \node[below left=0mm of center](p2){2};
  \node[below right=0mm of center](p3){3};
  \node[draw,inner sep=0pt,circle,fit=(p1)(p2)(p3)](c){};
  \draw (center) -- (c.0);
  \draw (center) -- (c.180);
  \draw (center) -- (c.-90);
\end{tikzpicture}
\end{document}

Answer 4

[fr] 我似乎认为所提出的解决方案不够有力

需要修改 PolGab 的 2eme 解决方案以获得适合字符名称的解决方案，并且准确度很高

[en] 在我看来，提出的解决方案都不可靠

需要稍微修改第二个 PolGab 解决方案，以获得适应指定节点中心的字符数量的解决方案

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning,fit}

\begin{document}

\begin{tikzpicture}
  \coordinate (center) at (0,0);
  \node[above=0mm of center](p1){1};
  \node[below left=0mm of center](p2){2};
  \node[below right=0mm of center](p3){3};
  \node[draw,inner sep=0pt,circle,fit=(p1)(p2)(p3)](c)at (center){};
  \draw (center) -- (c.0);
  \draw (center) -- (c.180);
  \draw (center) -- (c.-90);
\end{tikzpicture}
\begin{tikzpicture}
  \coordinate (center) at (0,0);
  \node[above=0mm of center](p1){1};
  \node[below left=0mm of center](p2){2};
  \node[below right=0mm of center](p3){312};
  \node[draw,inner sep=0pt,circle,fit=(p1)(p2)(p3)](c)at (center){};
  \draw (center) -- (c.0);
  \draw (center) -- (c.180);
  \draw (center) -- (c.-90);
\end{tikzpicture}

\end{document}