2

I have a graph on a frame in beamer, drawn with tikz and I would like to dismantle it after time. The original graph looks like this:

\begin{frame}{Eksempel}
\begin{tikzpicture}[node distance=1.45cm, thick,
                      main node/.style={circle, draw, font=\sffamily\bfseries}]

\node[main node] (1)                    {1};
\node[main node] (3) [below left  of=1] {3};
\node[main node] (4) [below right of=1] {4};
\node[main node] (2) [above right of=4] {2};
\node[main node] (6) [below right of=4] {6};

 %\draw[->, visible on=<2->] (1) -- (2);
 \path[->]
(1) edge (2)
(4) edge (2)
(6) edge (2)
(1) edge (3)
(4) edge (1)
(3) edge (4);



\end{tikzpicture}
\end{frame}

I want to make edges disappear and after the edges disappear, the nodes not having more edges get green. For example, on the next slide, all edges to node 2 should disappear, and on the next one, the node 2 itself should disappear.

I have tried stuff like visible on or onslide, but all of them give me error messages. Also, one could maybe use \pause, but this is quite weird if I dismantle a graph instead of putting stuff into it.

Hemmelig
  • 372

1 Answers1

4

This could serve as a starting point.

(With the help of https://tex.stackexchange.com/a/6155/263192)

enter image description here

\documentclass{beamer}
\usepackage{tikz}

\tikzset{onslide/.code args={<#1>#2}{% from https://tex.stackexchange.com/a/6155/263192
  \only<#1>{\pgfkeysalso{#2}}
}}


\begin{document}
\begin{frame}{Eksempel}
\begin{tikzpicture}[
    node distance=1.45cm, thick,
    main node/.style={circle, draw, font=\sffamily\bfseries}
]
    \node[main node] (1)                    {1};
    \node[main node] (3) [below left  of=1] {3};
    \node[main node] (4) [below right of=1] {4};
    \node<-3>[main node,onslide=<3>{green}] (2) [above right of=4] {2};
    \node<-4>[main node] (6) [below right of=4] {6}; % <-4> forces an additional overlay in which node 2 disappears


\path&lt;1&gt;[-&gt;] (1) edge (2)
    (4) edge (2)
    (6) edge (2);
\path[-&gt;] (1) edge (3)
    (4) edge (1)
    (3) edge (4);



\end{tikzpicture}
\end{frame}
\end{document}