相对于其他 2 个节点的节点定位

Question

我想将一个节点相对于其他两个节点对齐/定位。基本上，我希望所有内容都位于行和列中（由最大的成员决定）。在这个特定实例中，我希望节点j位于下图中红线和蓝线交点的中心。这将导致 2 个决策菱形像f和一样均匀分布g。

\documentclass{article}

\usepackage{tikz}
\begin{document}
\pagestyle{empty}

\usetikzlibrary{shapes, arrows, calc, positioning}

% Define block styles
\tikzstyle{state}   = [ rounded rectangle, draw, 
                        text centered, 
                        minimum height=3em 
                      ]
\tikzstyle{test}    = [ diamond, 
                        draw, 
                        shape aspect=2, 
                        inner sep = 0pt,
                        text width = 7em,
                        text centered
                      ]
\tikzstyle{action}  = [ rectangle, draw,
                        text width=8em,
                        inner sep = 5pt, 
                        minimum height=5em
                      ]

\begin{tikzpicture}[node distance = 1.25em, align = flush center, font = \small]
    % Place nodes
    \node [test] (f) {fLorem ipsum dolor sit amet};
    \node [test, right=of f] (g) {gLorem ipsum dolor};
    \node [test, below=of f] (h) {hLorem ipsum dolo};
    \node [action, below=of h] (i) {iLorem ipsum dolor sit amet, consectetur adipiscing elit.};
    \node [action, right=of i, fill=gray] (j) {jLorem ipsum dolor sit amet, consectetur adipiscing elit.};
    \node [test, below=of i] (l) {lLorem ipsum dolor};
    \node [test, below=of j, fill=gray] (m) {mLorem ipsum dolor};

    \draw [red] (g) -- +(0,-10);
    \draw [blue] (i) -- +(10,0);
\end{tikzpicture}

\end{document}

我读过一些有希望的东西chains但认为它可能对我的用途来说有点过度了。

Answer 1

有两种简单的方法可以实现这一点。如果你真的只想放置一个节点“在红线和蓝线的交叉点”，您可以轻松使用perpendicular专为此用途而设计的坐标系统（pgfmanual 2.10 第 130 页）。这在第一个中显示tikzpicture。

但是正如你也要求的那样“所有内容都应按行和列排列（其 [大小] 由最大成员决定）”，有一种更好、更合理的方法来实现所需的效果。只需使用 TikZ\matrix命令，它相当于\node[matrix]（pgfmanual 2.10 第 201 页和 375 页）。使用矩阵，您可以轻松地将行和列中的元素对齐，而不必担心列类型之类的问题（使用 时tabular）。

这是应用两种技术的示例图像，后面是生成图像的稍微简单的示例。

\documentclass{article}

\usepackage{tikz}
\begin{document}

\begin{tikzpicture}
    \node[draw] at (0,0) (left node) {Left Node};
    \node[draw] at (3,2) (top node) {Top Node};


    \node[draw] at (left node -| top node) {Node at intersection};
    %\node[draw,circle] at (top node |- left node) {Another node at the same position};

    \draw [red] (top node) -- +(0,-3);
    \draw [blue] (left node) -- +(6,0);
\end{tikzpicture}

\vspace{1cm}

\begin{tikzpicture}
    \matrix[column sep=1cm, row sep=1cm] (m) {
                                         & \node[draw] (top node) {Top Node};\\
    \node[draw] (left node) {Left Node}; & \node[draw] {Intersection Node};\\
    };
    \draw [red] (top node) -- +(0,-3);
    \draw [blue] (left node) -- +(6,0);
\end{tikzpicture}

\end{document}

Answer 2

您可以使用以下let语法：

\documentclass{article}

\usepackage{tikz}
\begin{document}
\pagestyle{empty}

\usetikzlibrary{shapes, arrows, calc, positioning}

% Define block styles
\tikzstyle{state}   = [ rounded rectangle, draw, 
                        text centered, 
                        minimum height=3em 
                      ]
\tikzstyle{test}    = [ diamond, 
                        draw, 
                        shape aspect=2, 
                        inner sep = 0pt,
                        text width = 7em,
                        text centered
                      ]
\tikzstyle{action}  = [ rectangle, draw,
                        text width=8em,
                        inner sep = 5pt, 
                        minimum height=5em
                      ]

\begin{tikzpicture}[node distance = 1.25em, align = flush center, font = \small]
    % Place nodes
    \node [test] (f) {fLorem ipsum dolor sit amet};
    \node [test, right=of f] (g) {gLorem ipsum dolor};
    \node [test, below=of f] (h) {hLorem ipsum dolo};
    \node [action, below=of h] (i) {iLorem ipsum dolor sit amet, consectetur adipiscing elit.};
    \path let \p1=(g), \p2=(i) in node[action, fill=gray] (j) at (\x1,\y2)   {jLorem ipsum dolor sit amet, consectetur adipiscing elit.};
    \node [test, below=of i] (l) {lLorem ipsum dolor};
    \node [test, below=of j, fill=gray] (m) {mLorem ipsum dolor};

    \draw [red] (g) -- +(0,-10);
    \draw [blue] (i) -- +(10,0);
\end{tikzpicture}

\end{document}