用鏈連接連接節點

Question 1

您可以透過連接在鏈上放置一個節點，只需設定一個to path即可：放置一個節點。

在 a 中to path，您可以訪問\tikztostart和\tikztotarget– 以及，\tikztonodes但我們將在這裡忽略這一點……或者您是否需要在某處添加文本？

然後可以像以前一樣計算差值，veclen此外還可以透過計算其方向/角度atan2。然後，結果可以node像以前一樣與 a 一起使用，它現在是的唯一（視覺）輸出to path。

這一切都是按照以下myarr with anchors風格完成的：

\tikzset{
  myarr with anchors/.style 2 args={
    to path={
      let \p0=($(\tikztotarget.#2)-(\tikztostart.#1)$) in
      node[myarr node,
           minimum height={veclen(\x0,\y0)},
           shape border rotate={atan2(\y0,\x0)}] at (\tikztostart.#1) {}}}}

對於簡單的鏈，它就像

\tikz[
  start chain=going right, node distance=2cm and 2cm,
  every join/.style={myarr with anchors={east}{west}},
  every on chain/.append style={draw, minimum width=2cm, minimum height=4cm}]
\node foreach \t in {A, ..., D} [on chain, join]{\t};

我確實喜歡更自動的方法，它會自己找到邊界上的點。

為此，我提供了一種myarr樣式，它使用 anedge來尋找邊界上的點，然後在與之前相同的計算中使用這些點。

（可選）它還接受兩個參數，這些參數要么為空（自動方法或不是節點），要么包含錨點規範（帶有.）。

參考：我們可以在節點的樣式定義中使用“let”（來自“TikZ”）嗎？。

程式碼

\documentclass[tikz]{standalone}
\usetikzlibrary{shapes.arrows, calc, chains}
\tikzset{
  myarr node/.style={
    shape=single arrow, draw=black, minimum width=20mm, anchor=tail,
    shape border uses incircle, single arrow head extend=+1pt,
    inner sep=+0pt, outer sep=+0pt},
  %
  myarr with anchors/.style 2 args={
    to path={
      let \p0=($(\tikztotarget.#2)-(\tikztostart.#1)$) in
      node[myarr node,
           minimum height={veclen(\x0,\y0)},
           shape border rotate={atan2(\y0,\x0)}] at (\tikztostart.#1) {}}},
  %
  myarr/.default={}{},
  myarr/.style 2 args={
    to path={
      \expanded{
        (\tikztostart#1) edge[path only, overlay, line to]
          coordinate[at start] (@start)
          coordinate[at end]   (@end) (\tikztotarget#2)}
      let \p0=($(@end)-(@start)$) in
      node[myarr node,
           minimum height={veclen(\x0,\y0)},
           shape border rotate={atan2(\y0,\x0)}] at (@start) {}}}}
\begin{document}
\pgfmathsetseed{872607}
\tikz[
  start chain=going right, node distance=2cm and 2cm,
  every join/.style={myarr with anchors={east}{west}},
  every on chain/.append style={draw, minimum width=2cm, minimum height=4cm}]
\node foreach \t in {A, ..., D} [on chain, join]{\t};

\tikz[
  start chain=going right, node distance=2cm and 2cm,
  every join/.style=myarr,
  every on chain/.append style={draw, minimum width=2cm, minimum height=4cm}]
\node foreach \t in {A, ..., D} [on chain, join]{\t};

\tikz[
  start chain=going above right, node distance=.4cm and 2cm,
  every join/.style=myarr,
  every on chain/.append style={draw, circle, minimum size=2cm}]
\node foreach \t in {A, ..., D} [on chain, join, shift={(3*rand, 3*rand)}]{\t};

\tikz[
  start chain=going above right, node distance=.4cm and 2cm,
  every join/.style={myarr={.north east}{.south west}},
  every on chain/.append style={draw, minimum width=2cm, minimum height=1cm}]
\node foreach \t in {A, ..., D} [on chain, join]{\t};
\end{document}

輸出

Answer