如何使一些边缘更厚并呈现不同的颜色？

Question

我有以下 TikZ 代码。我想使一些边缘更厚，并将其颜色更改为红色，但仅限于第二个覆盖层。您该怎么做？

\documentclass{beamer}
\usepackage[beamer,customcolors]{hf-tikz}
\usepackage{tikz}
\usepackage{tcolorbox}
\usetikzlibrary{arrows.meta, tikzmark, chains, fit,
    shapes}
\begin{document}
\begin{frame}
\definecolor{myblue}{RGB}{80,80,160}
\definecolor{mygreen}{RGB}{80,160,80}

\begin{tcolorbox}[colback=white, text width=8.5cm]
\begin{tikzpicture}[thick,
  every node/.style={draw,circle},
  fsnode/.style={fill=myblue},
  ssnode/.style={fill=mygreen}
]

\begin{scope}[every node/.style={circle,thick,draw}]
    \node (A) at (0,0) {};
    \node (B) at (0,3) {};
    \node (C) at (3,0) {};
    \node (D) at (3,3) {};
    \node (E) at (4.5, 1.5) {};
    \node (F) at (-3, 3) {};
\end{scope}

\begin{scope}[>={Stealth[black]},
              every node/.style={fill=white,circle},
              every edge/.style={draw=red,very thick}]
    \path [-] (A) edge  (B);
    \path [-] (A) edge  (C);
    \path [-] (B) edge  (D);
    \path [-] (D) edge  (C);
    \path [-] (D) edge  (E);
    \path [-] (C) edge  (E);
    \path [-] (F) edge  (B);
\end{scope}
\end{tikzpicture}
\end{tcolorbox}
\end{frame}
\end{document} 

Answer 1

您可以使用alt中的样式overlay-beamer-styles。它允许您在特定叠加层上切换样式。在此示例中，我使用

subvert/.style={alt=<#1>{every edge/.style={draw=blue,ultra thick}}{}}

改变给定覆盖层上的边缘样式。

\documentclass{beamer}
\usepackage[beamer,customcolors]{hf-tikz}
\usepackage{tikz}
\usepackage{tcolorbox}
\usetikzlibrary{arrows.meta, tikzmark, chains, fit,
    shapes,overlay-beamer-styles}
\begin{document}
\begin{frame}[fragile]
\definecolor{myblue}{RGB}{80,80,160}
\definecolor{mygreen}{RGB}{80,160,80}

\begin{tcolorbox}[colback=white, text width=8.5cm]
\begin{tikzpicture}[thick,
  every node/.style={draw,circle},
  fsnode/.style={fill=myblue},
  ssnode/.style={fill=mygreen}
%  every fit/.style={ellipse,draw,inner sep=-2pt,text width=2cm},
%  ->,shorten >= 3pt,shorten <= 3pt
]

\begin{scope}[every node/.style={circle,thick,draw}]
    \node (A) at (0,0) {};
    \node (B) at (0,3) {};
    \node (C) at (3,0) {};
    \node (D) at (3,3) {};
    \node (E) at (4.5, 1.5) {};
    \node (F) at (-3, 3) {};
\end{scope}

\begin{scope}[>={Stealth[black]},
              every node/.style={fill=white,circle},
              every edge/.style={draw=red,very thick},
              subvert/.style={alt=<#1>{every edge/.style={draw=blue,ultra thick}}{}}]
    \path [-] (A) edge  (B);
    \path [-,subvert=2] (A) edge  (C);
    \path [-] (B) edge  (D);
    \path [-,subvert=2] (D) edge  (C);
    \path [-,subvert=2] (D) edge  (E);
    \path [-] (C) edge  (E);
    \path [-] (F) edge  (B);
\end{scope}
\end{tikzpicture}
\end{tcolorbox}
\end{frame}
\end{document}