如何将一个节点置于两个节点下方的中心并创建一个指向另一个箭头的箭头？

Question

我有以下代码，它生成下面显示的图像。

\tikzstyle{decision} = [diamond, draw, text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt]
\tikzstyle{block} = [rectangle, draw, text width=5em, text centered, rounded corners, minimum height=4em]
\tikzstyle{bigblock} = [rectangle, draw, text width=10em, text centered, rounded corners, minimum height=4em]
\tikzstyle{invisible} = [rectangle, node distance=3cm, text=white]
\tikzstyle{line} = [draw, -latex']

\begin{tikzpicture}[node distance = 2.5cm, auto, scale=1.0, every node/.style={transform shape}]

% Place nodes
\node [block] (c0) {c0};
\node [block, right of=c0, node distance=3cm] (c1) {c1};
\node [bigblock, below of=c0] (point) {ver};
\node [decision, below of=point] (check) {?};
\node [bigblock, below of=check] (resume) {resume};
\node [bigblock, right of=check, node distance=4cm] (rollback) {rollback};
\node [invisible, below left of=resume] (c02) {};
\node [invisible, below right of=resume] (c12) {};

% Draw edges
\path [line] (c0) -- (point);
\path [line] (c1) -- (point);
\path [line] (point) -- (check);
\path [line] (check) -- node [near start] {yes} (resume);
\path [line] (check) -- node [near start] {no} (rollback);
\path [line] (resume) -- (c02);
\path [line] (resume) -- (c12);

\end{tikzpicture}

我试图将节点置于和(point)下方的中心，这样指向节点的箭头也是直的。我还希望来自节点的最后两个箭头也是直的。我还试图创建一个从节点到 和 之间的箭头的箭头，但我不知道该怎么做。如果有人能帮忙，我将不胜感激！(c0)(c1)(resume)(rollback)(c1)(point)

Answer 1

如果你使用|-and-|语法，这些事情都很简单，这已经解释得很好了在 Torbjørn T 的这个回答中。

\documentclass[tikz,border=3.14mm]{standalone}
\usetikzlibrary{shapes,arrows.meta}
\begin{document}
\tikzset{decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt},
block/.style={rectangle, draw, text width=5em, text centered, rounded corners, minimum height=4em},
bigblock/.style={rectangle, draw, text width=10em, text centered, rounded corners, minimum height=4em},
invisible/.style={rectangle, node distance=3cm, text=white},
line/.style={draw, -latex}}

\begin{tikzpicture}[node distance = 2.5cm, auto, scale=1.0, every node/.style={transform shape}]

% Place nodes
\node [block] (c0) {c0};
\node [block, right of=c0, node distance=3cm] (c1) {c1};
\path (c0) -- (c1) coordinate[midway] (aux);
\node [bigblock, below of=aux] (point) {ver};
\node [decision, below of=point] (check) {?};
\node [bigblock, below of=check] (resume) {resume};
\node [bigblock, right of=check, node distance=4cm] (rollback) {rollback};
\node [invisible, below of=resume,xshift=-1cm] (c02) {};
\node [invisible, below of=resume,xshift=1cm] (c12) {};

% Draw edges
\path [line] (c0) -- (c0|-point.north);
\path [line] (c1) -- (c1|-point.north) coordinate[midway](aux2);
\path [line] (point) -- (check);
\path [line] (check) -- node [near start] {yes} (resume);
\path [line] (check) -- node [near start] {no} (rollback);
\path [line] (rollback) |- (aux2);
\path [line] (resume.south -| c02) -- (c02);
\path [line] (resume.south -| c12) -- (c12);

\end{tikzpicture}
\end{document}