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TikZ 中箭头需要右转两次

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TikZ 中箭头需要右转两次

如果两个节点在垂直线上/下彼此相连，我怎样才能使箭头先向右，然后向上，然后向左。（已经使用了直接向下的垂直线，这就是为什么我希望箭头向右、向上然后向左）。

像这样：

在此处输入图片描述

我的代码：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric, arrows}

\tikzstyle{startstop} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=blue!30]

\tikzstyle{io} = [trapezium, trapezium left angle=70, trapezium right angle=110, minimum width=3cm, minimum height=1cm, text centered, draw=black]

\tikzstyle{process} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black]

\tikzstyle{decision} = [diamond, minimum width=3cm, minimum height=1cm, text centered, draw=black]

\tikzstyle{arrow} = [thick,->,>=stealth]
%
\begin{document}
\centering
\begin{tikzpicture}[node distance=5cm]

\node (start)   [startstop]                 {Filling a cup with water};
\node (p1)      [process, below of=start]   {Walk to the kitchen.};
\draw [arrow] (start) -- (p1);

\node (d1) [decision, below of=p1, yshift=1cm] {In front of correct cupboard?};
\node (p2) [process, right of=d1] {Walk to correct one.};
\node (p3) [process, below of=d1] {Grab a glas.};
\draw[arrow](p1) -- (d1);
\draw [arrow] (d1) -- node [anchor=south] {no} (p2);
\draw [arrow] (d1) -- node [anchor=west] {yes} (p3);
\node (d2) [decision, below of=p2] {In front of correct one?};
\draw [arrow] (d2) -- node [anchor=south]{yes}(p3);
\draw [arrow] (d2)   node [anchor=west] {no} (p2);
 \draw[arrow] (p2) -- (d2);
\end{tikzpicture}
\end{document}

答案1

您的代码无法有效地控制节点的分离，因为菱形需要更多空间，所以您必须使用定位库，它允许您将节点放置在相对于一定距离的位置\node(label_node)[style_name, on grid, below=distance cm of label_node]{Node_Text_content};，除其他修改外，样式声明必须在单独的行中，允许启用或禁用某些使用%并将它们保留为注释，或添加注释以使代码更具可读性，最后在菱形的情况下，您可以使用它text width来允许文本为多行。

结果：

在此处输入图片描述

梅威瑟：

% By J. Leon
%Use MIT licence, and beerware.
\documentclass[border=20pt]{standalone}
\usepackage[usenames,dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{arrows,shapes,positioning}
\definecolor{WIRE}{HTML}{002FA7} % Klein Blue

%Declaration of Styles, this code struture allow to enable or unable style modifiers.
\tikzstyle{startstop}=[
    rectangle, 
    minimum width=3cm, 
    minimum height=1cm, 
    text centered, 
    draw=black, 
    fill=blue!30
    ]
\tikzstyle{io}=[
    trapezium, 
    trapezium left angle=70, 
    trapezium right angle=110, 
    minimum width=3cm, 
    minimum height=1cm, 
    text centered,
    draw=black
    ]
\tikzstyle{process}=[
    rectangle,
    minimum width=3cm,
    minimum height=1cm,
    text centered,
    draw=black
    ]

\tikzstyle{decision}=[
    diamond,
    text width =2cm, % <-- Added to enable multiline text
    minimum width=4cm,
    minimum height=4cm,
    text centered, % Also you can white multiline using line1\\ line2
    draw=black
    ]
\tikzstyle{arrow}=[
    thick,
    ->,
    >=stealth
    ]

\begin{document}
    \begin{tikzpicture}[
        %Global Config
        %font=\sf
    ]
% Positioning the nodes using positioning library
\node (start) [startstop] {Filling a cup with water};
\node (p1) [process, on grid, below=2cm of start]{Walk to the kitchen.};
\node (d1) [decision, on grid, below=3.5cm of p1] {In front of correct cupboard?}; 
\node (p2) [process, on grid, right=5cm of d1] {Walk to correct one.}; 
\node (p3) [process, on grid, below=4cm of d1] {Grab a glas.};
\node (d2) [decision, on grid, below=4cm of p2] {In front of correct one?};

% Draw the arrows
\draw [arrow] (start) -- (p1);
\draw [arrow] (p1) -- (d1);
\draw [arrow] (d1) -- node [anchor=south] {no} (p2);
\draw [arrow] (d1) -- node [anchor=west] {yes} (p3); 
\draw [arrow] (d2) -- node [anchor=south]{yes}(p3);
\draw[arrow] (p2) -- (d2);

% Draw Special arrows 
\draw [arrow] (d2) --  node[anchor=east, above=2pt ] {no} ++(3.5,0) |- (p2);

    \end{tikzpicture}
\end{document}

答案2

我认为您的图表可以进一步改进（例如，在节点内添加多行文本）。

也可以看看：应该使用 \tikzset 还是 \tikzstyle 来定义 TikZ 样式？

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric, arrows, positioning}

\tikzset{
    startstop/.style={
        rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=blue!30
    },
    io/.style={
        trapezium, trapezium left angle=70, trapezium right angle=110, minimum width=3cm, minimum height=1cm, text centered, draw=black
    },
    process/.style ={
        rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black
    },
    decision/.style ={
        diamond, minimum width=3cm, minimum height=1cm, text centered, draw=black
    },
    arrow/.style = {
        thick,->,>=stealth
    },
}
%
\begin{document}
    \centering
    \begin{tikzpicture}[node distance=5cm]

    \node (start)   [startstop]                 {Filling a cup with water};
    \node (p1)      [process, below of=start]   {Walk to the kitchen.};
    \draw [arrow] (start) -- (p1);

    \node (d1) [decision, below of=p1, yshift=1cm] {In front of correct cupboard?};
    \node (p2) [process, right of=d1] {Walk to correct one.};
    \node (p3) [process, below of=d1] {Grab a glas.};
    \draw[arrow](p1) -- (d1);
    \draw [arrow] (d1) -- node [anchor=south] {no} (p2);
    \draw [arrow] (d1) -- node [anchor=west] {yes} (p3);
    \node (d2) [decision, below of=p2] {In front of correct one?};
    \draw [arrow] (d2) -- node [anchor=south]{yes}(p3);
    \draw [arrow] (d2) --  node[above=2pt] {no} ++(3,0) |- (p2);
    \draw[arrow] (p2) -- (d2);
    \end{tikzpicture}
\end{document}

在此处输入图片描述

但是，我会使用 TikZmatrix并执行如下操作：

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric, arrows, positioning, matrix}

\tikzset{
    startstop/.style={
        rectangle, text width=3cm, minimum height=1cm, text centered, draw=black, fill=blue!30, anchor=center
    },
    io/.style={
        trapezium, trapezium left angle=70, trapezium right angle=110, text width=3cm, minimum height=1cm, text centered, draw=black, anchor=center
    },
    process/.style ={
        rectangle, text width=3cm, minimum height=1cm, text centered, draw=black, anchor=center
    },
    decision/.style ={
        diamond, text width=3cm, minimum height=1cm, text centered, draw=black, anchor=center
    },
    arrow/.style = {
        thick,->,>=stealth
    },
}
%
\begin{document}
    \centering
    \begin{tikzpicture}
    \matrix[
        matrix of nodes, 
        column sep =20pt,
        row sep = 40pt,
        ]{
        |[name=start,startstop]|   {Filling a cup with water}\\
        |[name=p1,process]|  {Walk to\\ the kitchen.}\\ 
        |[name=d1,decision]|  {In front of \\ correct cupboard?}
            &|[name=p2,process]| {Walk to\\ correct one.} \\[-20pt] 
        |[name=p3,process]| {Grab a glas.}
            &|[name=d2,decision]| {In front of correct one?}\\
    };
    \draw[arrow] (start) -- (p1);
    \draw[arrow] (p1) -- (d1);
    \draw[arrow] (d1) -- node[above, near start] {no} (p2);
    \draw[arrow] (d1) -- node[above left, near start] {yes} (p3);
    \draw[arrow] (d2) -- node[above, near start] {yes} (p3);
    \draw[arrow] (d2) -- node[above, near start] {no} ++(3,0) |- (p2);
    \draw[arrow] (p2) -- (d2);
    \end{tikzpicture}
\end{document}

在此处输入图片描述

答案3

  • 您的问题与许多类似的问题重复，例如轻松编写 tikz 流程图，如何绘制从节点 3 到节点 1 的返回箭头， ETC。

  • 一个替代解决方案，需要付出一些（小小的）努力才能使代码更加简洁：

    \documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usetikzlibrary{arrows.meta,
                calc, chains,
                quotes,
                positioning,
                shapes.geometric}

\begin{document}
    \centering
    \begin{tikzpicture}[auto,
    node distance = 8mm and 12mm,
      start chain = going below,
      base/.style = {draw, text width=32mm, minimum height=8mm, outer sep=0pt,
                     align=center, on chain},
startstop/.style = {base, fill=blue!30},
  process/.style = {base},
 decision/.style = {base, diamond, aspect=1.3,
                    inner sep=0pt}
                        ]
\node (start)   [startstop] {Filling a cup with water};
\node (p1)      [process]   {Walk to the kitchen.};
\node (d1)      [decision]  {In front of correct cupboard?};
\node (p3)      [process]   {Grab a glas.};
\node (p2)      [process, right=of d1]  {Walk to correct one.};
\node (d2)      [decision]  {In front of correct one?};
    %
\draw[semithick,-Triangle]
    (start)   edge (p1)
    (p1)      edge (d1)
    (d1)      edge["yes"] (p3)
    (d1)      edge["no"]  (p2)
    (p2)      edge (d2)
    (p3)      edge["yes"] (d2)
    (d2.east)  to ["no"] + (1,0)
               |- (p2);
    \end{tikzpicture}
\end{document}

在此处输入图片描述

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