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Tikz：将箭头应用于所有绘制的线条

tag-icon • tag-icon tikz-pgf
Tikz：将箭头应用于所有绘制的线条

我必须画很多单独的线，但又不想把\draw[->]它们都放在前面。我以前也这样做过，所以我不知道为什么它不起作用。它总是把箭头放在最后一行。

一些缩短和简化的代码（但仍然是同样的问题）：

\documentclass[11pt]{article}
    \usepackage{fp}
    \usepackage{tikz}
    \usetikzlibrary{arrows,calc}

\begin{document}

    \newcommand{\inputNode}[3]{\node[shape=rectangle,draw=black,fill=green!25,thin,inner sep=0,minimum size=8mm,label=above:$#3$](In#2)at(#1){In$_#2$};}
    \newcommand{\junctionNode}[5]
    {
    \node[shape=rectangle,draw=black,fill=blue!10,thin,inner sep=0,minimum height=1cm,minimum width=#3cm](Box#2)at(#1){$#5$};
    \FPeval\inputs {clip(#3-1)}
    \foreach \int in {0,1,...,\inputs}
    {   \path let
            \p1=(Box#2.north west), \p2=(Box#2.north east), \n1={(\x2-\x1-20)/\inputs}
        in
            node(Box#2-in\int) at (\x1+10+\n1*\int,\y1){}
        ;}}
    \begin{tikzpicture}
        \inputNode{1,8}{1}{Input1}
        \inputNode{3.5,8}{2}{Input2}
        \inputNode{6,8}{3}{Input3}
        \inputNode{8.5,8}{4}{Input4}
        \junctionNode{3,4}{1}{4}{2}{Junction1}


        \draw [->,>=stealth]
            (In1) to [out=270,in=90] (Box1-in0.center)
            (In2) to [out=270,in=90] (Box1-in1.center)
            (In3) to [out=270,in=90] (Box1-in2.center)
            (In4) to [out=270,in=90] (Box1-in3.center);
    \end{tikzpicture}
\end{document}

在此处输入图片描述

答案1

使用edge操作符代替to运算符可以解决问题：

\documentclass[11pt]{article}
\usepackage{fp}
\usepackage{tikz}
\usetikzlibrary{arrows,calc}

\begin{document}  

\newcommand{\inputNode}[3]{%
  \node[
    shape=rectangle, 
    draw=black,
    fill=green!25,
    thin,
    inner sep=0,
    minimum size=8mm,
    label=above:{#3},
  ] (In#2) at (#1) {In$_#2$};%
}
\newcommand{\junctionNode}[5]{
  \node[
    shape=rectangle,   
    draw=black,
    fill=blue!10,
    thin,
    inner sep=0,
    minimum height=1cm,
    minimum width=#3cm,
  ] (Box#2) at (#1) {#5};%
  \FPeval\inputs {clip(#3-1)}
  \foreach \int in {0,1,...,\inputs} {
    \path let
      \p1=(Box#2.north west),
      \p2=(Box#2.north east),
      \n1={(\x2-\x1-20)/\inputs}
    in
      node(Box#2-in\int) at (\x1+10+\n1*\int,\y1){}
    ;%
  }%
}
  % Spacer %  
\begin{tikzpicture}  
  \inputNode{1,8}{1}{Input1}  
  \inputNode{3.5,8}{2}{Input2}  
  \inputNode{6,8}{3}{Input3}  
  \inputNode{8.5,8}{4}{Input4}  
  \junctionNode{3,4}{1}{4}{2}{Junction1}  

  \path [->,>=stealth]  
    (In1) edge [out=270,in=90] (Box1-in0.center)  
    (In2) edge [out=270,in=90] (Box1-in1.center)  
    (In3) edge [out=270,in=90] (Box1-in2.center)  
    (In4) edge [out=270,in=90] (Box1-in3.center);  
\end{tikzpicture}    
\end{document}

结果

此外，我还将文本移出了数学模式。像“Input”这样的单词在数学模式中不会被设置为单词，而是被设置为变量的乘积我，n，页，你， 和吨。如果字体应该是斜体，则可以使用\textit{...}或$\mathit{...}$。与数字结合，\textit{Input1}也使用斜体字体表示数字。

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