如何讓這個圖變得更好？

Question

我得到了這張圖，直觀地顯示了各種反應的相互關係，擴展了 Xi 對反應器 R101 和 R102 的職責，從而規定了循環比 R、吹掃和補充流量。在玩了幾個小時的初稿後，我仍然對結果不太滿意：

這是我的程式碼。非常感謝有關改進的建議。

\begin{figure}[!ht]
\centering
\scalebox{1.2}[1.2]{
\begin{tikzpicture}[node distance=2cm,>=stealth',bend angle=45,auto]
\tikzstyle{place}=[circle,thick,draw=blue!75,fill=blue!20,minimum size=6mm]
\tikzstyle{red place}=[place,draw=red!75,fill=red!20]
\tikzstyle{transition}=[rectangle,thick,draw=black!75,
          fill=black!10,minimum size=13mm]

\tikzstyle{every label}=[red]

\begin{scope}[xshift=0cm]

\node[] 
at (-4, -2)   (start) {};
\node[] 
at (4, -2)   (end) {};

\node [red place,tokens=0]
                  (w1')                                                {};
\node [place]     (c1') [below of=w1']                                 {};
\node [red place] (s1') [below of=c1',xshift=-15mm,label=left:$\xi_1$]      {};
\node [red place,tokens=0]
                  (s2') [below of=c1',xshift=15mm,label=right:$\xi_2$] {};


\node [transition] (e1') [left of=c1'] {}
  edge [post,bend left]                  (w1')
  edge [post]                            (s1')
  edge [pre]                             (s2')
  edge [pre]                             (c1')
  edge [pre,dotted]                      (start);


\node [transition] (l1') [right of=c1'] {}
  edge [post]                            (c1')
  edge [pre]                             (s1')
  edge [post]                            (s2')
  edge [pre,bend right] node[swap] {}    (w1')
  edge[post,dotted] (end);

\node[] 
at (-2, -2)   (c)  {R101};
\node[] 
at (2, -2)    (c2) {R102};
\node[red] 
at (0, +0.65) (c2) {$\xi_3$};
\node[blue] 
at (0, -1.35) (c2) {$R$};
\node[black] 
at (-5, -2)   (c2) {make-up};
\node[black] 
at (4.5, -2)  (c2) {purge};

\end{scope}

\end{tikzpicture}
 }
\end{figure}

Answer 1

只是為了表明梅塔普斯特也可用，這是一個具有不同佈局的版本。你更喜歡這個嗎？這是否表明您需要什麼？

\documentclass[border=5mm]{standalone}
\usepackage{luatex85}
\usepackage{luamplib}
\begin{document}
\mplibtextextlabel{enable}
\begin{mplibcode}
beginfig(1);

    path R, X[], reactor[];

    R  = fullcircle scaled 20 shifted 84 down;
    X1 = fullcircle scaled 20 shifted 42 up;
    X2 = fullcircle scaled 20 shifted 42 down;
    X3 = fullcircle scaled 20 shifted 84 up;

    reactor0 = unitsquare shifted -(1/2, 1/2) scaled 42;
    reactor1 = reactor0 shifted 63 left;
    reactor2 = reactor0 shifted 63 right;

    forsuffixes $=1,2:
        fill reactor$ withcolor 7/8 white;
        draw reactor$;
        label("R10" & decimal $, center reactor$);
    endfor

    fill R withcolor 3/4[blue, white];
    draw R withcolor 1/2 blue;
    label.top("$R$", point 2 of R) withcolor 1/2 blue;

    forsuffixes $=1,2,3:
        fill X$ withcolor 3/4[red, white];
        draw X$ withcolor 1/2 red;
        label.top("$\xi_{" & decimal $ & "}$", point 2 of X$) withcolor 1/2 red;
    endfor

    z1 = point -1/2 of reactor1 shifted 42 left;
    z2 = point  3/2 of reactor2 shifted 42 right;

    label.lft("make up", z1); drawarrow z1 -- point -1/2 of reactor1 dashed withdots scaled 1/2;
    label.rt ("purge", z2); drawarrow point 3/2 of reactor2 -- z2 dashed withdots scaled 1/2;

    forsuffixes $=X1,X3:
        drawarrow center reactor1 {up} .. {right} center $
            cutbefore reactor1 cutafter fullcircle scaled 22 shifted center $;
        drawarrow center $ {right} .. {down} center reactor2
            cutbefore $ cutafter reactor2 shifted 1 up;
    endfor

    forsuffixes $=R, X2:
        drawarrow center reactor2 {down} .. {left} center $
            cutbefore reactor2 cutafter fullcircle scaled 22 shifted center $;
        drawarrow center $ {left} .. {up} center reactor1
            cutbefore $ cutafter reactor1 shifted 1 down;
    endfor

endfig;
\end{mplibcode}
\end{document}

用 編譯這個lualatex。

Answer 2

當您要求改進程式碼時，我有一些建議：

1. 您應該使用\tikzset而不是\tikzstyle.閱讀更多這裡。
2. 鈦kZ已經提供了選項scale，所以使用起來\scalebox不太TikZ 型。
3. 放置scopewherexshift=0cm是不必要的。
4. 「化妝」與箭頭之間的距離與「淨化」與箭頭之間的差異並不相同。這是小問題，但我們應該解決它。
5. 「R101」的彎曲箭頭看起來在到達之前稍微下降了一點Ψ₃ .指向“R102”的彎曲箭頭似乎在下降之前先上升了一點。

順便說一句，我想向您展示該圖的程式碼。我不使用所有\nodes，即命令應該更容易理解（\draw意味著繪製一些東西並\node意味著要插入一些節點）。此外，這不使用任何笛卡爾/極坐標 -這與鈦不同k其他圖形工具的 Z。

\documentclass[tikz]{standalone}
\usetikzlibrary{positioning,arrows.meta}
\begin{document}
\begin{tikzpicture}[scale=1.2,-stealth]
\tikzset{
    reactor/.style={rectangle,thick,draw=black!75,fill=black!10,minimum size=13mm},
    place/.style={circle,thick,draw=blue!75,fill=blue!20,minimum size=6mm},
    red place/.style={place,draw=red!75,fill=red!20}
}
\node[place] (r) {} node[above=1em,blue!75] {$R$};
\node[reactor,left=1.5 cm of r] (101) {R101};
\node[reactor,right=1.5 cm of r] (102) {R102};
\node[red place,above=2 cm of r] (3) {};
    \draw (3) node[above=1em,red] {$\xi_3$};
\node[red place,below=1.5cm of 101.south east] (1) {};
    \draw (1) node[left=1em,red] {$\xi_1$};
\node[red place,below=1.5cm of 102.south west] (2) {};
    \draw (2) node[right=1em,red] {$\xi_2$};
\node[left=2cm of 101] (start) {make-up};
\node[right=2cm of 102] (end) {purge};
\draw (101)--(1);
\draw (1)--(102);
\draw (102)--(r);
\draw (r)--(101);
\draw (101) to[out=90,in=180] (3);
\draw (3) to[out=0,in=90] (102);
\draw (102)--(2);
\draw (2)--(101);
\draw[dotted] (start)--(101);
\draw[dotted] (102)--(end);
\end{tikzpicture}
\end{document}