TikZ 中节点之间的双弯曲箭头

Question

考虑以下 MWE：

\documentclass{memoir}

\usepackage{tikz}
\usetikzlibrary{positioning}

\begin{document}
    \begin{tikzpicture}
        % Nodes
        \node[draw] (node1) {1};
        \node[draw, below left=of node1] (node2) {2};
        \node[draw, below right=of node1] (node3) {3};

        % Arrows
        \draw[->] (node1.south) -| (node2.north);
        \draw[->] (node1.south) -| (node3.north);
    \end{tikzpicture}
\end{document}

用于绘制：

例如，我希望箭头弯曲两次，方法是写类似|-|而不是 的内容-|。这样简单的解决方案可行吗？还是我需要更复杂的东西？

（我在网上搜索过答案，但显然使用了错误的关键词。任何有关 TikZ 手册有用部分的帮助都将不胜感激。）

Answer 1

像这样：

\documentclass{memoir}

\usepackage{tikz}
\usetikzlibrary{positioning}
\usetikzlibrary{calc}

\begin{document}
\begin{tikzpicture}
  % Nodes
  \node[draw] (node1) {1};
  \node[draw, below left=of node1] (node2) {2};
  \node[draw, below right=of node1] (node3) {3};

  % Arrows
  \draw[->] (node1.south) |- ($(node1.south) - (0,5mm)$) -| (node2.north);
  \draw[->] (node1.south) |- ($(node1.south) - (0,5mm)$) -| (node3.north);
\end{tikzpicture}
\begin{tikzpicture}
  % Nodes
  \node[draw] (node1) {1};
  \node[draw, below left=of node1] (node2) {2};
  \node[draw, below right=of node1] (node3) {3};

  % Arrows
  \draw[->] (node1.south) |- ++(0,-5mm) -| (node2.north);
  \draw[->] (node1.south) |- ++(0,-8mm) -| (node3.north);
\end{tikzpicture}
\end{document}