TikZ：建立具有不同高度的節點的向下鏈

Question

我想建立 TikZ 節點的下行鏈。有些節點是旋轉的，並且它們的高度可能不同。

考慮下面 MWE 的輸出：

水平鏈適應節點的不同寬度，而向下鏈則不適應。這可能與旋轉有關係嗎？你知道我怎麼能得到向下的鏈來防止像水平方向那樣的節點相交嗎？

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{chains,shapes}
\tikzstyle{arrow}
  = [ shape=single arrow
    , single arrow head extend=.75em
    , single arrow head indent=.25em
    , minimum width=3em
    , draw
    ]
\tikzstyle{rarrow}
  = [ shape=single arrow
    , single arrow head extend=.75em
    , single arrow head indent=.25em
    , minimum width=3em
    , draw
    , rotate=-90
    ]
\begin{document}
    \begin{tikzpicture}[start chain,every node/.style={on chain,join}]
        \node[arrow] {foo};
        \node[arrow] {foo};
        \node[arrow] {foooooooooo};
        \node[arrow] {foo};
    \end{tikzpicture}\\
    \begin{tikzpicture}[start chain=going below,every node/.style={on chain,join}]
        \node[rarrow] {foo};
        \node[rarrow] {foo};
        \node[rarrow] {foooooooooo};
        \node[rarrow] {foo};
    \end{tikzpicture}

\end{document}

Answer 1

這是非常快速的解決方法，因為tikzpicture環境彼此獨立：

\documentclass{article}
\parindent=0pt
\usepackage{tikz}
\usetikzlibrary{chains,shapes}
\tikzstyle{arrow}
  = [ shape=single arrow
    , single arrow head extend=.75em
    , single arrow head indent=.25em
    , minimum width=3em
    , draw
    ]
\tikzstyle{rarrow}
  = [ shape=single arrow
    , single arrow head extend=.75em
    , single arrow head indent=.25em
    , minimum width=3em
    , draw
    ]
\begin{document}
    \begin{tikzpicture}[start chain,every node/.style={on chain,join}]
        \node[arrow] {foo};
        \node[arrow] {foo};
        \node[arrow] {foooooooooo};
        \node[arrow] {foo};
    \end{tikzpicture}\\
\rotatebox{-90}{%
    \begin{tikzpicture}[start chain,
 every node/.style={on chain,join}]
        \node[rarrow] {foo};
        \node[rarrow] {foo};
        \node[rarrow] {foooooooooo};
        \node[rarrow] {foo};
    \end{tikzpicture}}
\end{document}