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在流程图中对箭头的路径进行编码

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在流程图中对箭头的路径进行编码

我对 Zarko 的代码做了一些修改这里制作我自己的流程图。

\documentclass[a4paper,11pt,twoside]{book}
\usepackage[a4paper,left=2.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm]{geometry}
\usepackage{amsmath, amsthm, amssymb, amsfonts}

\usepackage[english,greek]{babel}
\usepackage[utf8]{inputenc}
\usepackage{tikz}
% shapes
\usetikzlibrary{shapes}
%arrows
\usetikzlibrary{arrows,arrows.meta}
%decorations
\usetikzlibrary{decorations.text,decorations.pathreplacing,patterns,shadows.blur,fadings}
% miscellaneous
\usetikzlibrary{calc,quotes,positioning,fpu,angles,fit,spy,chains}

\begin{document}

    \begin{tikzpicture}[
  node distance = 8mm and 16mm,
  start chain = A going below,
  base/.style = {draw, minimum width=32mm, minimum height=8mm,
    align=center, on chain=A},
  startstop/.style = {ultra thick,double,base, rectangle, rounded corners, fill=white},
  process/.style = {ultra thick,base, rectangle, fill=white},
  io/.style = {ultra thick,base, trapezium, 
    trapezium left angle=70, trapezium right angle=110,
    fill=white},
  decision/.style = {ultra thick,base, diamond, fill=white},
  every edge quotes/.style = {auto=right}]
  ]
  \node [startstop]       {Έναρξη};     % <-- A-1
  \node [io]              {Εισαγωγή}; %A-2
  \node [decision]        {Ερώτηση}; %Α-3
  \node [io]              {Απάντηση}; %A-4
  \node [startstop]       {Τέλος};      % <-- A-5
  \node [process, right=of A-3]    {Κάτι};     % <-- A-6

  \draw [arrows=-Stealth] 
  (A-1) edge          (A-2)
  (A-2) edge   (A-3)
  (A-3) edge  ["όχι"]     (A-4)
    (A-3) edge  ["ναι"]     (A-6)
  (A-4) edge    (A-5)
  (A-6) |- ($(A-1.south east)!0.5!(A-2.north east)$)
  -| ([xshift=7mm] A-2.north)
  ;
  \end{tikzpicture}
\end{document}

它看起来是这样的。

在此处输入图片描述

问题是，A-3如果A-2没有A-6箭头。我想要这样的东西：

在此处输入图片描述

我该怎么做？

答案1

我尽可能少地修改了你的代码：

  1. 我添加了every join/.style=-Stealth自动绘制箭头的选项，而无需重建链条。

  2. 我将节点 A-6 放置在节点 A-2 的右上方，没有将其加入链中，也没有对其进行跟踪并将其转换为坐标。

    \node [on chain,coordinate, above right=3mm and 20 mm of A-2]{}; % <-- A-6

  3. 因此，我为循环构建了一个箭头，因为 (A-6) 没有加入链中。 \draw [arrows=-Stealth] (A-3) -| node[pos=.25,below]{Κάτι}(A-6)-| (A-2.30);
  4. 我只放置标签而没有绘制任何其他内容，因为箭头已经由链条构建。 \path (A-3) --node[left]{όχι} (A-4);

截屏

\documentclass[a4paper,11pt,twoside]{book}
\usepackage[a4paper,left=2.5cm,right=2.5cm,top=2.5cm,bottom=2.5cm]{geometry}
\usepackage{amsmath, amsthm, amssymb, amsfonts}
\usepackage[utf8]{inputenc}
%\usepackage[greek]{babel}

% babel dont work for me, i took these 5 lines from the answer of Zarko
\usepackage{fontspec}
\usepackage{polyglossia}
\setmainlanguage{greek}
\setromanfont{Minion Pro} %% Select your favourite font
\setotherlanguage{english}

\usepackage{tikz}
% shapes
\usetikzlibrary{shapes}
%arrows
\usetikzlibrary{arrows,arrows.meta}
%decorations
\usetikzlibrary{decorations.text,decorations.pathreplacing,patterns,shadows.blur,fadings}
% miscellaneous
\usetikzlibrary{calc,quotes,positioning,fpu,angles,fit,spy,chains}

\begin{document}

    \begin{tikzpicture}[
  node distance = 8mm and 16mm,
  start chain = A going below,
  base/.style = {draw, minimum width=32mm, minimum height=8mm,
    align=center, on chain=A,join},
  startstop/.style = {ultra thick,double,base, rectangle, rounded corners, fill=white},
  process/.style = {ultra thick,base, rectangle, fill=white},
  io/.style = {ultra thick,base, trapezium, 
    trapezium left angle=70, trapezium right angle=110,
    fill=white},
  decision/.style = {ultra thick,base, diamond, fill=white},
  every edge quotes/.style = {auto=right},
  every join/.style=-Stealth]
  ]
  \node [startstop]       {Έναρξη};     % <-- A-1
  \node [io]              {Εισαγωγή}; %A-2
  \node [decision]        {Ερώτηση}; %Α-3
  \node [io]              {Απάντηση}; %A-4
  \node [startstop]       {Τέλος};      % <-- A-5
  \node [on chain,coordinate, above right=3mm and 20 mm of A-2]{};     % <-- A-6

  \draw [arrows=-Stealth] 
  (A-3) -| node[pos=.25,below]{Κάτι}(A-6)-| (A-2.30);
  \draw  (A-3) --node[left]{όχι} (A-4);
  \end{tikzpicture}
\end{document}

答案2

您只需删除节点“A-6”并从A-3到绘制箭头A-2。我还借此机会重新安排了加载tikz库，并稍微简化/缩短了图像代码：

\documentclass[a4paper,11pt,twoside]{book}
\usepackage[a4paper,
            margin=2.5cm]{geometry}
\usepackage{amsmath, amsthm, amssymb}

\usepackage{fontspec}
\usepackage{polyglossia}
\setmainlanguage{greek}
\setromanfont{Minion Pro} %% Select your favorite font
\setotherlanguage{english}

\usepackage{tikz}
\usetikzlibrary{angles, arrows, arrows.meta,
                calc, chains,
                decorations.text, decorations.pathreplacing,
                fadings, fit, 
                patterns, positioning,
                quotes,
                shapes, shadows.blur,
                spy}

\begin{document}
\centering
    \begin{tikzpicture}[
node distance = 8mm and 4mm,
  start chain = A going below,
  base/.style = {draw, minimum width=32mm, minimum height=8mm,
                  align=center, on chain=A, join=by -Stealth},
startstop/.style = {ultra thick,double,base, rectangle, rounded corners, fill=white},
  process/.style = {ultra thick,base, rectangle, fill=white},
    io/.style = {trapezium, trapezium stretches,
                 trapezium left angle=70, trapezium right angle=110,       
                 base, ultra thick, fill=white},
  decision/.style = {ultra thick,base, diamond, fill=white},
every edge quotes/.style = {auto=right}
                        ]
  \node [startstop]       {Έναρξη};     % <-- A-1
  \node [io]              {Εισαγωγή};  
  \node [decision]        {Ερώτηση};  
  \node [io]              {Απάντηση};  
  \node [startstop]       {Τέλος};      % <-- A-5

\coordinate[above left=of A-2.east] (aux);
\draw [arrows=-Stealth]
        (A-3.east)  to  ["ναι"] ++ (1,0) |- (aux) -- (aux |- A-2.north);
\path   (A-3)       to  ["όχι"]     (A-4);
    \end{tikzpicture}
\end{document}

在此处输入图片描述

编辑1：由XeLaTeX引擎编译。

编辑2：来自 MWE 中所有库的实际上仅使用以下内容：

\usetikzlibrary{arrows.meta,
                chains,
                positioning,
                quotes,
                shapes
                }

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