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TikZ 拟合非规则形状的节点

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TikZ 拟合非规则形状的节点

我正在寻找一种更好的方法来做以下事情：拟合具有非规则形状的节点，就像在 MWE 中一样。这样我就可以为拟合的节点添加标签。

\documentclass{standalone}

\usepackage{tikz}
\usetikzlibrary{positioning}

\tikzset{any/.style={draw,shape=rectangle}}
\tikzset{nxs/.style={xshift=-2mm}}
\tikzset{pxs/.style={xshift=2mm}}
\tikzset{nys/.style={yshift=-2mm}}
\tikzset{pys/.style={yshift=2mm}}

\begin{document}

\begin{tikzpicture}
\node [any] (n1) {N1};
\node [any,right=of n1] (n2) {N2};
\node [any,above=of n2] (n3) {N3};

\draw ([nxs,pys]n1.north west) -- ([nxs,pys]n2.north west) -| 
      ([nxs,pys]n3.north west) -- ([pxs,pys]n3.north east) -| 
      ([pxs,nys]n2.south east) -- ([nxs,nys]n1.south west) -- cycle;

\node [yshift=4mm] at (n1.north) {Cluster}; 

\end{tikzpicture}

\end{document}

enter image description here

答案1

我还想知道是否有任何自动化的方法可以做到这一点。与此同时，这里有一个使用 fit 库的替代方法。这至少使边距与标准矩形配合一致。

\documentclass{standalone}

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

\tikzset{any/.style={draw,shape=rectangle}}

\begin{document}

\begin{tikzpicture}
\node [any] (n1) {N1};
\node [any,right=of n1] (n2) {N2};
\node [any,above=of n2] (n3) {N3};

\node[fit=(n1) (n2)] (n12) {};
\node[fit=(n2) (n3)] (n23) {};

\draw (n12.north west) -- (n12.north west-| n23.west) -- (n23.north west) 
 -- (n23.north east) -- (n23.south east) -- (n12.south west) -- cycle;

\node [inner xsep = 0pt, anchor=south west] at (n12.north west) {Cluster}; 

\end{tikzpicture}

\end{document}

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