考虑以下 MWE：
% !TeX program = lualatex
\documentclass{beamer}
\usepackage{tikz-feynman}
\usetheme{metropolis}
\title{A minimal example}
\date{\today}
\author{Matthias Vogelgesang}
\institute{Centre for Modern Beamer Themes}
\begin{document}
\maketitle
\section{First Section}
\begin{frame}{First Frame}
\begin{figure}[H]
\begin{tabular}{cc}
\multicolumn{2}{c}{\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1,remember picture] {
a -- [plain] t1
-- [scalar,red] t2
--[plain]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay,remember picture]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
}\\
\multicolumn{2}{c}{(a) $C_{PRR}$}\\[6pt]
\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1,remember picture] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay,remember picture]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay,remember picture]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t3);
} & \tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1,remember picture] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay,remember picture]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay,remember picture]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t2);
}
\\
(b) $ C_{PMR} $ & (c) $ C_{PPR} $ \\[6pt]
\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1,remember picture] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [scalar,red]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay,remember picture]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay,remember picture]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t2);
}
\tikz[overlay,remember picture]{\path (t3) --(t1) coordinate[midway] (m3);
\draw[thick,red] (m3) --(t3);
}
& \tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1,remember picture] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [scalar,red]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay,remember picture]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay,remember picture]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t3);
}
\tikz[overlay,remember picture]{\path (t3) --(t1) coordinate[midway] (m3);
\draw[thick,red] (m3) --(t3);
} \\
(d) $C_{PPP}$ & (e) $ C_{PMP} $
\end{tabular}
% \caption{caption}
\end{figure}
\end{frame}
\end{document}
以上内容产生了下图：
如您所见，叠加层全部堆叠在幻灯片的左下角，而不是单独应用于每个图表。请注意，此问题不会发生在文章或书籍文档类中。
如何正确应用覆盖？
答案1
只需添加即可修复您的代码
\tikzset{every picture/.append style={remember picture}}
在文档的开头。remember picture因此，所有的 s 都变得多余，
\documentclass{beamer}
\usepackage{tikz-feynman}
\usetheme{metropolis}
\title{A minimal example}
\date{\today}
\author{Matthias Vogelgesang}
\institute{Centre for Modern Beamer Themes}
\tikzset{every picture/.append style={remember picture}}
\begin{document}
\maketitle
\section{First Section}
\begin{frame}{First Frame}
\begin{figure}[H]
\begin{tabular}{cc}
\multicolumn{2}{c}{\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [scalar,red] t2
--[plain]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
}\\
\multicolumn{2}{c}{(a) $C_{PRR}$}\\[6pt]
\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t3);
} & \tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t2);
}
\\
(b) $ C_{PMR} $ & (c) $ C_{PPR} $ \\[6pt]
\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [scalar,red]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t2);
}
\tikz[overlay]{\path (t3) --(t1) coordinate[midway] (m3);
\draw[thick,red] (m3) --(t3);
}
& \tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [scalar,red] t2
--[scalar,red]t3
-- [scalar,red]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\tikz[overlay]{\path (t1) --(t2) coordinate[midway] (m1);
\draw[thick,red] (m1) --(t1);
}
\tikz[overlay]{\path (t2) --(t3) coordinate[midway] (m2);
\draw[thick,red] (m2) --(t3);
}
\tikz[overlay]{\path (t3) --(t1) coordinate[midway] (m3);
\draw[thick,red] (m3) --(t3);
} \\
(d) $C_{PPP}$ & (e) $ C_{PMP} $
\end{tabular}
% \caption{caption}
\end{figure}
\end{frame}
\end{document}
您的代码无法运行的原因是费曼图内的顶点没有被正确记住。
编辑：只是为了完整性：有一种更直接的方式来产生相同的输出：只需定义一个“新”的风格
\tikzset{semidashed straight line/.style={dashed,postaction={decorate,decoration={markings,
mark=at position 0 with {\coordinate (X0); },
mark=at position 0.5 with {\draw[thick,solid] (X0) -- (0,0); }}}}}
这样就不需要任何覆盖了。（在您的示例中，您可以通过将所有标量设置为这种样式来进一步简化这一点，就像您对实线重复执行的操作一样，但我个人不会这样做，因为您可能在某处需要一个真正的标量。）
\documentclass{beamer}
\usepackage{tikz-feynman}
\usetikzlibrary{decorations.markings}
\usetheme{metropolis}
\title{A minimal example}
\date{\today}
\author{Matthias Vogelgesang}
\institute{Centre for Modern Beamer Themes}
\tikzset{semidashed straight line/.style={dashed,postaction={decorate,decoration={markings,
mark=at position 0 with {\coordinate (X0); },
mark=at position 0.5 with {\draw[thick,solid] (X0) -- (0,0); }}}}}
\begin{document}
\maketitle
\section{First Section}
\begin{frame}{First Frame}
\begin{figure}[H]
\begin{tabular}{cc}
\multicolumn{2}{c}{\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [semidashed straight line,red] t2
--[plain]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
}\\
\multicolumn{2}{c}{(a) $C_{PRR}$}\\[6pt]
\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [semidashed straight line,red] t2
--[semidashed straight line,red]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
& \tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [semidashed straight line,red] t2
--[semidashed straight line,red]t3
-- [plain]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
\\
(b) $ C_{PMR} $ & (c) $ C_{PPR} $ \\[6pt]
\tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [semidashed straight line,,red] t2
-- [semidashed straight line,red]t3
-- [semidashed straight line,red]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};
& \tikzfeynmanset{
every plain={blue},
}
\feynmandiagram[scale=.5,transform shape] [small, horizontal=a to t1] {
a -- [plain] t1
-- [semidashed straight line,red] t2
--[semidashed straight line,red]t3
-- [semidashed straight line,red]t1,
t2 -- [plain] p1 ,
t3 -- [plain] p2,
};\\
(d) $C_{PPP}$ & (e) $ C_{PMP} $
\end{tabular}
% \caption{caption}
\end{figure}
\end{frame}
\end{document}