TikZ：如何将两个装饰物放置在相反的方向

Question

如何使用 TikZ 创建以下图像？

我使用以下代码创建了此图像，截取了输出的屏幕截图，然后通过擦除左侧菱形内的边缘来修改屏幕截图。

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows,decorations.markings}
\begin{document}
 \begin{tikzpicture}[transform shape,node distance=1.4cm,semithick]
  \node [draw, fill, shape=circle] (0)  {};
  \node [draw, fill, shape=circle] (1) [right of=0] {};
  \path (1) edge[bend left,postaction={decorate, decoration={
                  markings,
                  mark=at position 0.99 with {\arrow[>=diamond,white] {>}; },
                  mark=at position 0.99 with {\arrow[>=open diamond]  {>}; } } }] (0)
        (0) edge[bend right,postaction={decorate, decoration={
                  markings,
                  mark=at position 0.99 with {\arrow[>=diamond,white] {>}; },
                  mark=at position 0.99 with {\arrow[>=open diamond]  {>}; } } }] (1);
 \end{tikzpicture}
\end{document}

Answer 1

你是指这样的吗？

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,decorations.markings}
\begin{document}
 \begin{tikzpicture}[transform shape,node distance=1.4cm,semithick]
  \node [draw, fill, shape=circle] (0)  {};
  \node [draw, fill, shape=circle] (1) [right of=0] {};
  \path (1) edge[bend left,postaction={decorate, decoration={
                  markings,
                  mark=at position 0.99 with {\arrow{diamond[fill=white]}; },
                  mark=at position 0.01 with {\arrowreversed{diamond[fill=white]}} } }] (0);
\end{tikzpicture}
\end{document}