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tikz防止标签覆盖边缘

tag-icon • tag-icon tikz-pgf labels
tikz防止标签覆盖边缘

以下代码绘制了一个包含 4 个节点的简单图形。不幸的是，标签覆盖/重叠了箭头（我用圆圈标记了两个问题区域。）

如何防止标签覆盖这些箭头？

\documentclass[]{scrartcl}
\usepackage{tkz-graph}
\usetikzlibrary{positioning, fit, patterns, arrows.meta}
\begin{document}
\begin{center}
    \begin{tikzpicture}
    [scale=0.6,auto=left,every node/.style={circle,fill=black!20, minimum size=2.5em}]
    \tikzset{vertex/.style = {shape=circle,draw,minimum size=1.5em}}
    \tikzset{>={Latex[length=2.5mm]}}

    \node (s) at (0,5){s};
    \node (v1) at (6,9){1};
    \node (v2) at (6,1){2};
    \node (t) at (12,5){t};

    \tikzset{EdgeStyle/.style={->}}
    \Edge[label=$1/10^6$, color=red](s)(v1);
    \Edge[label=$1/10^6$](s)(v2);
    \Edge[label=$1/1$, color=red](v1)(v2);
    \Edge[label=$1/10^6$](v1)(t);
    \Edge[label=$1/10^6$, color=red](v2)(t);
    \end{tikzpicture}
\end{center}
\end{document}

在此处输入图片描述

答案1

你的问题是样式的定义every node/.style={...}。它还定义了标签的样式。如果你删除它并将其用于节点vertex，你的图表就会变得很好。

利用 tikz 库，positioning您的代码是：

\documentclass[]{scrartcl}
\usepackage{tkz-graph}
\usetikzlibrary{positioning, fit, patterns, arrows.meta}

\begin{document}
\begin{center}
    \begin{tikzpicture}
    [auto=left,
     node distance=28 mm and 50mm,
%     every node/.style={circle,fill=black!20, minimum size=2.5em},
    vertex/.style = {shape=circle,draw,fill=black!20,minimum size=2.5em},
    EdgeStyle/.style={-{Latex[length=2.5mm]}}
    ]

    \node[vertex]                   (s)  {s};
    \node[vertex,above right=of s]  (v1) {1};
    \node[vertex,below right=of s]  (v2) {2};
    \node[vertex,above right=of v2] (t)  {t};

    \Edge[label=$1/10^6$, color=red](s)(v1);
    \Edge[label=$1/10^6$](s)(v2);
    \Edge[label=$1/1$, color=red](v1)(v2);
    \Edge[label=$1/10^6$](v1)(t);
    \Edge[label=$1/10^6$, color=red](v2)(t);
    \end{tikzpicture}
\end{center}
\end{document}

在此处输入图片描述

答案2

干得好：

\documentclass[]{scrartcl}
\usepackage{tkz-graph}
\usetikzlibrary{positioning, fit, patterns, arrows.meta}
\begin{document}
\begin{center}
    \begin{tikzpicture}
    [
        scale=0.6, 
        auto=left, 
        customNode/.style={shape = circle, fill = black!20, minimum size = 2.5em}
    ]
    \tikzset{>={Latex[length=2.5mm]}}

    \node [customNode] (s) at (0,5){s};
    \node [customNode] (v1) at (6,9){1};
    \node [customNode] (v2) at (6,1){2};
    \node [customNode] (t) at (12,5){t};

    \draw[->, color = red] (s) -- node [midway] {$1/10^6$} (v1);
    \draw[->] (s) -- node [midway] {$1/10^6$}(v2);
    \draw[->, color = red] (v1) -- node [midway] {$1/1$} (v2);
    \draw[->] (v1) -- node [midway] {$1/10^6$} (t);
    \draw[->, color = red] (v2) -- node [midway] {$1/10^6$} (t);
    \end{tikzpicture}
\end{center}
\end{document}

答案3

这是一个自动化\Edge命令以更易于使用的解决方案：

\documentclass[]{scrartcl}
\usepackage{tkz-graph}
\usetikzlibrary{positioning, fit, patterns, arrows.meta}

\let\oldEdge\Edge
\renewcommand{\Edge}[4][\empty]{\ifx{[#1]}\empty\oldEdge(#3)(#4);\else\draw[->, color = #2] (#3) -- node [midway,color=black] {#1} (#4);\fi}%\oldEdge[](#2)(#3)node[midway]{#1};\fi}

\begin{document}
\begin{center}
    \begin{tikzpicture}
    [scale=0.6,auto=left,every node/.style={circle,fill=black!20, minimum size=2.5em}]
    \tikzset{vertex/.style = {shape=circle,draw,minimum size=1.5em}}
    \tikzset{>={Latex[length=2.5mm]}}   
    \node (s) at (0,5){s};
    \node (v1) at (6,9){1};
    \node (v2) at (6,1){2};
    \node (t) at (12,5){t};

    \tikzset{every node/.style={circle,minimum size=1em}}
    \Edge[$1/10^6$]{red}{s}{v1};
    \Edge{black}{s}{v2};
    \Edge[$1/1$]{red}{v1}{v2};
    \Edge[$1/10^6$]{black}{v1}{t};
    \Edge[$1/10^6$]{red}{v2}{t};
    \end{tikzpicture}
\end{center}
\end{document}

我无法将 \Edge 与自定义节点一起使用，而是使用了\draw类似@Sam 的命令。

我在命令every node中使用它之前重新定义了样式。\Edge

\Edge 可以不带可选参数，因为没有标签。

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