tikz 沿 3 个相交圆的精确文本位置

Question

我无法正确地将文本字符串放置在使用 tikz 和 decorations.text 库制作的 3 个圆圈的周长上。

这就是我目前所得到的

显然，文本完全偏移了，我需要文本 A 和 B 镜面反射到圆圈的右上角，而文本 C 则位于圆圈的底部。我还想用某种灰色阴影为三个圆圈的交叉点着色。这是我的代码

\draw[ultra thick, -stealth,
  postaction={decorate,decoration={text effects along path,
    text={Some text A}, text align=left, reverse path,
    text effects/.cd, 
      text along path, 
      every character/.style={fill=white, yshift=-0.5ex}}}]
  (1.5, 0) circle [radius=4];

\draw[draw=black, ultra thick, -stealth,
  postaction={decorate,decoration={text effects along path,
    text={Some text B}, text align=center, reverse path,
        text effects/.cd, 
      text along path, 
      every character/.style={fill=white, xshift=2ex, yshift=-0.5ex}}}]
  (-1.5, 0) circle [radius=4];

\draw[draw=black, ultra thick, -stealth,
  postaction={decorate,decoration={text effects along path,
    text={Some text C}, text align=right,
    text effects/.cd, 
      text along path, 
      every character/.style={fill=white, yshift=-0.5ex}}}]
  (0, -3) circle [radius=4];

\node[draw=none,text width=2.5cm] at (0.5,-0.9) { Some other T};




\end{tikzpicture}

任何帮助表示感谢

Answer 1

我看到有一个-stealth指令，它被抑制了，因为圆就是圆。所以如果你改用arcs，你就可以同时拥有两者：更容易定位文本和箭头。你付出的代价是你必须输入圆弧的起点，而不是圆心。 更新：您可以保留中心坐标，我使用另一个装饰来放置箭头（并且我还删除了使xshift事物看起来不对称的，并yshift用替换raise）。

\documentclass[tikz,border=3.14mm]{standalone}
\usetikzlibrary{decorations.text,decorations.markings}

\begin{document}
 \begin{tikzpicture}


\draw[ultra thick, 
  postaction={decorate,decoration={text effects along path,
    text={Some text A}, text align=center, reverse path,raise=-0.5ex,
    text effects/.cd, 
      text along path, 
      every character/.style={fill=white}}},
      postaction={decorate,decoration={markings,{mark=at position 0.25 with
      {\arrow{stealth}}}}}]
  (1.5, 2)+(-90:4) arc(-90:270:4);

\draw[draw=black, ultra thick, 
  postaction={decorate,decoration={text effects along path,
    text={Some text B}, text align=center, reverse path,raise=-0.5ex,
        text effects/.cd, 
      text along path, 
      every character/.style={fill=white}}},
      postaction={decorate,decoration={markings,{mark=at position 0.75 with
      {\arrow{stealth}}}}}]
  (-1.5, 2)+(-90:4) arc(-90:270:4);

\draw[draw=black, ultra thick,
  postaction={decorate,decoration={text effects along path,raise=-0.5ex,
    text={Some text C}, text align=center,
    text effects/.cd, 
      text along path, 
      every character/.style={fill=white}}},
      postaction={decorate,decoration={markings,{mark=at position 0.25 with
      {\arrow{stealth}}}}}]
  (0,-3)+(90:4) arc(90:450:4);

\node[draw=none,text width=2.5cm] at (0.5,-0.9) { Some other T};

\end{tikzpicture}
\end{document}

为了完整性，还有另一种方法：只需旋转整个物体并调整旋转角度来定义文本位置并且不带箭头。

\documentclass[tikz,border=3.14mm]{standalone}
\usetikzlibrary{decorations.text}

\begin{document}
 \begin{tikzpicture}[scale=0.75]


\draw[ultra thick,rotate around={225:(1.5,2)},
  postaction={decorate,decoration={text effects along path,
    text={Some text A}, text align=center, reverse path,raise=-0.5ex,
    text effects/.cd, 
      text along path, 
      every character/.style={fill=white}}}]
  (1.5, 2) circle(4);

\draw[draw=black, ultra thick,rotate around={315:(-1.5,2)}, 
  postaction={decorate,decoration={text effects along path,
    text={Some text B}, text align=center, reverse path,raise=-0.5ex,
        text effects/.cd, 
      text along path, 
      every character/.style={fill=white}}}]
  (-1.5, 2) circle(4);

\draw[draw=black, ultra thick,rotate around={90:(0,-3)},
  postaction={decorate,decoration={text effects along path,raise=-0.5ex,
    text={Some text C}, text align=center,
    text effects/.cd, 
      text along path, 
      every character/.style={fill=white}}}]
  (0,-3) circle(4);

\node[draw=none,text width=2.5cm] at (0.5,-0.25) { Some other T};

\end{tikzpicture}
\end{document}