tikzpicture：使用相对位置控制画线的路径

Question

\documentclass[border=80pt]{standalone}

\usepackage{tikz}
\usetikzlibrary{positioning}

\begin{document}

\begin{tikzpicture}[on grid]
\draw [help lines] (0, 0) grid (3, 2);

\node (A) at (0, 0) {A};
\node[above right = 1 and 1 of A] (B) {B};
\node[above right = 1 and 1 of B] (C) {C};
\node[right = 3 of A] (D) {D};

\draw[->] (A) -- (0.8, 0.1) -- (B);
\draw[->] (B) -- (C);
\draw[->] (C) -- (D);

\end{tikzpicture}

\end{document}

我画了 4 个节点和 3 条线。当连接A和 时B，我希望线穿过(0.8, 01)，它通过使用\draw[->] (A) -- (0.8, 0.1) -- (B);

但是当我使用相对位置时，tikz 无法解析坐标： \draw[->] (A) -- [above right = 0.1 and 0.8 of A] -- (B);。那么我可以使用相对位置[above right = 0.1 and 0.8 of A]来控制线条绘制的路径吗？

更新：

@Ignasi 提出了一个有趣的解决方案，不幸的是我无法使用关键字重现它shift：

\documentclass[border=80pt]{standalone}

\usepackage{tikz}
\usetikzlibrary{positioning}

\begin{document}

\begin{tikzpicture}[line width=1pt, on grid]
\draw [help lines] (0, 0) grid (3, 2);

\node (A) at (0, 0) {A};
\node[above right = 1 and 1 of A] (B) {B};
\node[above right = 1 and 1 of B] (C) {C};
\node[right = 3 of A] (D) {D};

%\draw[->] (A) -- (1, 0) -- (B);
\draw[->] (A) -- ([shift={(0, -1)}]B) -- (B);
\draw[->] (B) -- (C);
\draw[->] (C) -- (D);

\end{tikzpicture}

\end{document}

Answer 1

您可以使用该calc库，然后可以将其作为 来引用($(A)+(0.8, 0.1)$)。

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{positioning,calc}
\begin{document}

\begin{tikzpicture}[on grid]
\draw [help lines] (0, 0) grid (3, 2);

\node (A) at (0, 0) {A};
\node[above right = 1 and 1 of A] (B) {B};
\node[above right = 1 and 1 of B] (C) {C};
\node[right = 3 of A] (D) {D};

\draw[->] (A) -- ($(A)+(0.8, 0.1)$) -- (B);
\draw[->] (B) -- (C);
\draw[->] (C) -- (D);

\end{tikzpicture}

\end{document}

Answer 2

\documentclass[border=80pt]{standalone}

\usepackage{tikz}
\usetikzlibrary{positioning}

\begin{document}
    
    \begin{tikzpicture}[on grid]
        \draw [help lines] (0, 0) grid (3, 2);
        
        \node (A) at (0, 0) {A};
        \node[above right = 1 and 1 of A] (B) {B};
        \node[above right = 1 and 1 of B] (C) {C};
        \node[right = 3 of A] (D) {D};
        
        \draw[->, red] (A) -| (B);
        \draw[->, green] (A) |- (B);
        
        
    \end{tikzpicture}
    
\end{document}