beamer animation in tikz cannot specify separate steps

Question

I am using a piece of code (\tikzset) which people have repeatedly been posting in various questions, e.g. Mindmap tikzpicture in beamer (reveal step by step) and highlight a node in tikz.

But now, I want to specify a piece of animation that highlights in step 1 and 3, separately (alt=<1,3>). However, this code gives pgf error. How should this problem be resolved?

\documentclass{beamer}
\usepackage{tikz}
\tikzset{
    invisible/.style={opacity=0,text opacity=0},
    visible on/.style={alt=#1{}{invisible}},
    alt/.code args={<#1>#2#3}{%
      \alt<#1>{\pgfkeysalso{#2}}{\pgfkeysalso{#3}} 
    },
}
\begin{document}
\begin{frame}
  \begin{tikzpicture}
    \node[circle, draw, alt=<1,3>{red}{black}]{};
  \end{tikzpicture}
\end{frame}
\end{document}

Have you seen this question? It deals specifically with the case alt=<1,3>. https://tex.stackexchange.com/questions/84513/highlighting-in-beamer-using-tikz-nodes — PatrickT, Oct 01 '21 at 06:42
@PatrickT sorry I don't understand that answer. it didn't change the definition of alt. in my example, I directly use alt= which is not quite the same as that answer which uses BeamerAlert — Jason Hu, Oct 01 '21 at 14:01

score 1 · Answer 1 · answered Jul 05 '22 at 21:01

To prevent tikz from thinking the , would be the end of the key value, place your list of overlays in {1,3}:

\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{overlay-beamer-styles}
\begin{document}
\begin{frame}
  \begin{tikzpicture}
    \node[circle, draw, alt=<{1,3}>{red}{black}]{};
  \end{tikzpicture}
\end{frame}
\end{document}

beamer animation in tikz cannot specify separate steps

1 Answers1