<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">% Copyright 2018 by Till Tantau
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file doc/generic/pgf/licenses/LICENSE for more details.

\ProvidesFileRCS{tikzlibraryanimations.code.tex}

\usepgfmodule{animations}%



% Scope syntax extension:

\def\tikz@collect@scope@anims#1{%
  \let\tikz@scope@anims\pgfutil@empty%
  \let\tikz@collect@command#1%
  \tikz@collect@scope@anims@parse%
}%
\def\tikz@collect@scope@anims@parse{%
  \pgfutil@ifnextchar[{\tikz@collect@scope@anims@opt}{%
    \pgfutil@ifnextchar:{\tikz@collect@scope@anims@go}{%
      \tikz@collect@scope@anims@done}}%]
}%
\def\tikz@collect@scope@anims@done{%
  \expandafter\tikz@collect@command\expandafter[\tikz@scope@anims]%
}%
\def\tikz@collect@scope@anims@opt[{%]
  \expandafter\tikz@collect@command\expandafter[\tikz@scope@anims%]
}%
\def\tikz@collect@scope@anims@go:#1=#2{%
  \expandafter\def\expandafter\tikz@scope@anims\expandafter{\tikz@scope@anims animate={myself:={:{#1}={#2}}},}%
  \tikz@collect@scope@anims@parse%
}%




%
% The main keys:
%

\def\tikzanimateset{\pgfqkeys{/tikz/animate}}%
\tikzanimateset{
  .code={
    \pgfkeys{/handlers/first char syntax=true}
    \pgfkeyssetvalue{/handlers/first char syntax/\expandafter\meaning\string"}{\tikz@animation@value}%
    \def\tikz@anim@t{0}%
    \def\tikz@anim@t@base{0}%
    \def\tikz@anim@t@current{0}%
    \tikzanimateset{#1}
  },
  scope/.code=\tikz@anim@scope{#1}{}{},
  sync/.code=\tikz@anim@sync@scope{#1}{}{},
  entry/.code=\tikz@anim@make@entry,
  object/.code=\tikz@anim@set@object{#1},
  attribute/.code=\tikz@anim@set@attr{#1},
  id/.code=\tikz@anim@set@id{#1},
  time/.code=\tikz@anim@set@time{#1},
  value/.code=\tikz@anim@add{\tikz@anim@value{#1}},%
  remember/.code=\pgfmathadd@{\tikz@anim@t}{\tikz@anim@t@base}\global\let#1\pgfmathresult,
  resume/.code=\tikz@anim@resume{#1},
  fork/.code={\tikz@anim@parse@time{#1}\pgfmathadd@\tikz@anim@t\tikz@anim@t@base\let\tikz@anim@t@base\pgfmathresult\def\tikz@anim@t{0}},
  fork/.default = 0later,
  base/.style={scope={/utils/exec=\let\tikz@animation@time\tikz@anim@base@text,#1,entry}},
}%

\tikzset{
  make snapshot of/.code=\edef\tikz@temp{#1}\ifx\tikz@temp\pgfutil@empty\else\pgfsnapshot{#1}\fi,
  make snapshot after/.code=\edef\tikz@temp{#1}\ifx\tikz@temp\pgfutil@empty\else\pgfsnapshotafter{#1}\fi,
  make snapshot if necessary/.code=\ifpgfsysanimationsupported\else\pgfsnapshot{#1}\fi,
  make snapshot if necessary/.default=0s,
}%

\def\tikz@anim@scope#1#2#3{%
  {#2\tikzanimateset{#1}#3}%
}%
\def\tikz@anim@sync@scope#1#2#3{%
  {%
    #2%
    \tikzanimateset{#1}%
    #3%
    \pgfmathadd@{\tikz@anim@t}{\tikz@anim@t@base}%
    \expandafter%
  }\expandafter\pgfmathsubtract@\expandafter{\pgfmathresult}{\tikz@anim@t@base}%
  \tikz@anim@set@time{\pgfmathresult}%
}%

\def\tikz@anim@set@time#1{%
  \tikz@anim@parse@time{#1}%
  \let\tikz@anim@t@current\tikz@anim@t%
  \pgfmathadd@\tikz@anim@t\tikz@anim@t@base%
  \let\tikz@animation@time\pgfmathresult%
}%

\def\tikz@anim@value#1{%
  \def\tikz@anim@result{#1}
  \ifx\tikz@anim@result\pgf@special@current@text%
  \else%
    \ifx\tikz@animation@parser\relax%
    \else%
      \tikz@animation@parser{#1}%
    \fi%
  \fi%
}%


\def\tikz@anim@resume#1{%
  \pgfparsetime{#1}%
  \pgfmathsubtract@{\pgftimeresult}{\tikz@anim@t@base}%
  \tikz@anim@set@time{\pgfmathresult}%
}%


% The object--attribute entries are of the following forms:
%
% objects:attributes
% objects:attributes_id
%

\def\tikz@animation@syntax@check#1#2{%
  \def\tikz@animation@rest{#1}%
  \expandafter\pgfutil@in@\expandafter:\expandafter{\tikz@key}%
  \ifpgfutil@in@%
    \expandafter\tikz@anim@parse@colon\tikz@key\pgf@stop%
  \else%
    #2%
  \fi%
}%

\def\tikz@anim@parse@colon#1:#2\pgf@stop{%
  \expandafter\tikz@anim@sync@scope\expandafter{\tikz@animation@rest}{%
    \tikz@anim@set@object{#1}%
    \pgfutil@in@_{#2}%
    \ifpgfutil@in@%
      \tikz@anim@parse@under#2\pgf@stop%
    \else%
      \tikz@anim@parse@under#2_\pgf@stop%
    \fi%
    }{\tikz@anim@make@entry}%
}%

\def\tikz@anim@parse@under#1_#2\pgf@stop{%
  \tikz@anim@set@attr{#1}%
  \tikz@anim@set@id{#2}%
}%

\def\tikz@anim@set@attr#1{%
  \pgfkeys@spdef\tikz@anim@a{#1}%
  \ifx\tikz@anim@a\pgfutil@empty%
  \else%
    \let\tikz@anim@tl@attributes\tikz@anim@a%
  \fi%
}%

\def\tikz@anim@set@id#1{%
  \pgfkeys@spdef\tikz@anim@a{#1}%
  \ifx\tikz@anim@a\pgfutil@empty%
  \else%
    \let\tikz@anim@tl@id\tikz@anim@a%
  \fi%
}%

\def\tikz@anim@set@object#1{%
  \pgfkeys@spdef\tikz@anim@a{#1}%
  \ifx\tikz@anim@a\pgfutil@empty%
  \else%
    \let\tikz@anim@tl@objects\tikz@anim@a%
  \fi%
}%


%
% Parsing of values
%

\def\tikz@animation@value#1{%
  \tikz@animation@value@parser#1\pgf@stop%
}%

\def\tikz@animation@value@parser"#1"{%
  \def\tikz@animation@value@head{#1}%
  \pgfutil@ifnextchar\pgf@stop{\tikz@animation@value@rest=}{%
    \pgfutil@ifnextchar b\tikz@animation@value@rest@base\tikz@animation@value@rest%
  }%
}%
\def\tikz@animation@value@rest=#1\pgf@stop{%
  \tikz@anim@sync@scope{#1}{\expandafter\tikz@anim@add\expandafter{\expandafter\tikz@anim@value\expandafter{\tikz@animation@value@head}}}{\tikz@anim@make@entry}%
}%

\def\tikz@animation@value@rest@base base{%
  \tikz@anim@sync@scope{}{\let\tikz@animation@time\tikz@anim@base@text\expandafter\tikz@anim@add\expandafter{\expandafter\tikz@anim@value\expandafter{\tikz@animation@value@head}}}{\tikz@anim@make@entry}%
  \pgfutil@ifnextchar\pgf@stop{\tikz@animation@value@rest=}{\tikz@animation@value@rest}%
}%




%
% The parsers
%

\def\tikz@anim@simple@parse#1{} % nothing to do, \def\tikz@anim@result{#1} is already done

\def\tikz@anim@slant@parse#1{\pgfmathsetmacro\tikz@anim@result{atan(#1)}}%

\def\tikz@anim@dashpattern@parse#1{%
  \pgfmathsetmacro\tikz@anim@dash@phase{\tikz@dashphase}%
  \def\tikz@dashpattern{}%
  \expandafter\tikz@scandashon\pgfutil@gobble#1o\@nil%
  \edef\tikz@anim@result{{\tikz@dashpattern}{\tikz@anim@dash@phase pt}}%
}%
\def\tikz@anim@dashoffset@parse#1{%
  \pgfmathparse{#1}%
  \edef\tikz@anim@result{{\tikz@dashpattern}{\pgfmathresult pt}}%
}%
\def\tikz@anim@dash@parse#1{%
  \tikz@anim@dash@parse@#1\pgf@stop%
}%
\def\tikz@anim@dash@parse@#1phase#2\pgf@stop{%
  \pgfmathsetmacro\tikz@anim@dash@phase{#2}%
  \def\tikz@dashpattern{}%
  \expandafter\tikz@scandashon\pgfutil@gobble#1o\@nil%
  \edef\tikz@anim@result{{\tikz@dashpattern}{\tikz@anim@dash@phase pt}}%
}%

\def\tikz@anim@xshift@parse#1{\pgfmathparse{#1}\edef\tikz@anim@result{\noexpand\pgfqpoint{\pgfmathresult pt}{0pt}}}%
\def\tikz@anim@yshift@parse#1{\pgfmathparse{#1}\edef\tikz@anim@result{\noexpand\pgfqpoint{0pt}{\pgfmathresult pt}}}%

\def\tikz@anim@xscale@parse#1{\pgfmathparse{#1}\edef\tikz@anim@result{\pgfmathresult,1}}%
\def\tikz@anim@yscale@parse#1{\pgfmathparse{#1}\edef\tikz@anim@result{1,\pgfmathresult}}%

\def\tikz@anim@shift@parse#1{\tikz@scan@one@point\tikz@anim@do@shift#1}%
\def\tikz@anim@do@shift#1{\def\tikz@anim@result{#1}}%

\def\tikz@anim@position@parse#1{%
  \begingroup%
    \let\tikz@transform=\relax%
    \pgf@xc-\pgf@pt@x%
    \pgf@yc-\pgf@pt@y%
    \pgfsettransform\tikz@anim@saved@transform%
    \tikz@scan@one@point\tikz@anim@do@position#1}%
\def\tikz@anim@do@position#1{%
    \pgf@process{\pgfpointtransformed{#1}}%
    \advance\pgf@x by\pgf@xc%
    \advance\pgf@y by\pgf@yc%
    \xdef\tikz@anim@temp{\noexpand\pgfqpoint{\the\pgf@x}{\the\pgf@y}}%
  \endgroup%
  \let\tikz@anim@result\tikz@anim@temp%
}%

\def\tikz@anim@view@parse#1{\tikz@anim@view@parse@#1\pgf@stop}%
\def\tikz@anim@view@parse@{%
  \pgfutil@ifnextchar({\tikz@scan@one@point\tikz@anim@view@parse@a}{\tikz@anim@view@node}%
}%
\def\tikz@anim@view@parse@a#1{%
  \def\tikz@anim@result{{#1}}%
  \pgfutil@ifnextchar r{\tikz@anim@view@parsed@rec}{\tikz@scan@one@point\tikz@anim@view@parse@b}%
}%
\def\tikz@anim@view@parsed@rec rectangle{\tikz@scan@one@point\tikz@anim@view@parse@b}%
\def\tikz@anim@view@parse@b#1{%
  \expandafter\def\expandafter\tikz@anim@result\expandafter{\tikz@anim@result{#1}}%
  \pgfutil@ifnextchar\pgf@stop\pgfutil@gobble{\tikzerror{Wrong view syntax}}%
}%
\def\tikz@anim@view@node#1\pgf@stop{%
  \expandafter\ifx\csname pgf@sh@ns@#1\endcsname\relax%
    \tikzerror{Undefined node '#1'}%
  \else%
    % Compute a bounding box for the node:
    {%
      \pgf@process{\pgfpointanchor{#1}{west}}%
      \pgf@xa\pgf@x \pgf@ya\pgf@y
      \pgf@xb\pgf@x \pgf@yb\pgf@y
      \pgf@process{\pgfpointanchor{#1}{north}}%
      \ifdim\pgf@x&lt;\pgf@xa \pgf@xa=\pgf@x\fi%
      \ifdim\pgf@x&gt;\pgf@xb \pgf@xb=\pgf@x\fi%
      \ifdim\pgf@y&lt;\pgf@ya \pgf@ya=\pgf@y\fi%
      \ifdim\pgf@y&gt;\pgf@yb \pgf@yb=\pgf@y\fi%
      \pgf@process{\pgfpointanchor{#1}{south}}%
      \ifdim\pgf@x&lt;\pgf@xa \pgf@xa=\pgf@x\fi%
      \ifdim\pgf@x&gt;\pgf@xb \pgf@xb=\pgf@x\fi%
      \ifdim\pgf@y&lt;\pgf@ya \pgf@ya=\pgf@y\fi%
      \ifdim\pgf@y&gt;\pgf@yb \pgf@yb=\pgf@y\fi%
      \pgf@process{\pgfpointanchor{#1}{east}}%
      \ifdim\pgf@x&lt;\pgf@xa \pgf@xa=\pgf@x\fi%
      \ifdim\pgf@x&gt;\pgf@xb \pgf@xb=\pgf@x\fi%
      \ifdim\pgf@y&lt;\pgf@ya \pgf@ya=\pgf@y\fi%
      \ifdim\pgf@y&gt;\pgf@yb \pgf@yb=\pgf@y\fi%
      \xdef\tikz@anim@result{{\noexpand\pgfqpoint{\the\pgf@xa}{\the\pgf@ya}}{\noexpand\pgfqpoint{\the\pgf@xb}{\the\pgf@yb}}}
    }%
  \fi%
}%

\def\tikz@anim@path@parse#1{%
  {%
    \setbox0=\hbox{{% protext against side effects
        \pgfinterruptpath%
        \expandafter\tikz@scan@next@command#1\pgf@stop%
        \pgfsyssoftpath@getcurrentpath\tikz@anim@result%
        \pgfprocessround{\tikz@anim@result}{\tikz@anim@result}%
        \global\let\tikz@anim@result\tikz@anim@result%
        \endpgfinterruptpath%
      }}%
  }%
}%

% The special along parser


\def\tikz@anim@along#1#2{%
  % Parse the path...
  {%
    \setbox0=\hbox{{% protect against side effects
        \pgfinterruptpath%
        \pgf@relevantforpicturesizefalse%
        \iftikz@anim@is@position%
          \let\tikz@transform=\relax%
          \pgf@x-\pgf@pt@x%
          \pgf@y-\pgf@pt@y%
          \edef\tikz@anim@along@shift{\pgf@xc\the\pgf@x\pgf@yc\the\pgf@y}%
          \pgfsettransformentries#1%
        \else%
          \pgftransformreset%
        \fi
        \tikz@scan@next@command#2\pgf@stop%
        \pgfsyssoftpath@getcurrentpath\tikz@anim@parsed@path%
        \pgfprocessround{\tikz@anim@parsed@path}{\tikz@anim@parsed@path}%
        \iftikz@anim@is@position%
          \tikz@anim@shift@path%
          \global\let\tikz@anim@parsed@path\tikz@anim@patched@path%
        \else%
          \global\let\tikz@anim@parsed@path\tikz@anim@parsed@path%
        \fi%
        \endpgfinterruptpath%
      }}%
  }%
  \pgfanimationset{along softpath/.expand once=\tikz@anim@parsed@path}%
}%

\def\tikz@anim@shift@path{%
  \let\tikz@anim@patched@path\pgfutil@empty%
  \tikz@anim@along@shift%
  \expandafter\tikz@anim@shift@path@\tikz@anim@parsed@path\pgf@stop%
}%
\def\tikz@anim@shift@path@{%
  \pgfutil@ifnextchar\pgf@stop\pgfutil@gobble{%
    \pgfutil@ifnextchar\bgroup\tikz@anim@shift@path@sub\tikz@anim@shift@path@copy}%
}%
\def\tikz@anim@shift@path@copy#1{%
  \expandafter\def\expandafter\tikz@anim@patched@path\expandafter{\tikz@anim@patched@path#1}%
  \tikz@anim@shift@path@%
}%
\def\tikz@anim@shift@path@sub#1#2{%
  \pgf@x#1%
  \pgf@y#2%
  \advance\pgf@x by\pgf@xc%
  \advance\pgf@y by\pgf@yc%
  \edef\tikz@temp{{\the\pgf@x}{\the\pgf@y}}%
  \expandafter\tikz@anim@shift@path@copy\expandafter{\tikz@temp}%
}%



\def\tikz@anim@parse@origin#1{%
  \tikz@scan@one@point\tikz@anim@parse@origin@#1\relax%
}%
\def\tikz@anim@parse@origin@#1{\tikz@anim@add{\pgfanimationset{origin={#1}}}}%


% Internals

\def\tikz@anim@tl@objects{}%
\def\tikz@anim@tl@attributes{}%
\def\tikz@anim@tl@id{default}%

\let\tikz@anim@tl@exec@options\pgfutil@empty
\let\tikz@anim@tl@early@options\pgfutil@empty

\def\tikz@anim@add@early#1{\expandafter\def\expandafter\tikz@anim@tl@early@options\expandafter{\tikz@anim@tl@early@options#1}}%
\def\tikz@anim@add@once@early#1{%
  \global\advance\tikz@anim@once@count by1\relax%
  \expandafter\expandafter\expandafter\def\expandafter\expandafter\expandafter\tikz@anim@tl@early@options%
  \expandafter\expandafter\expandafter{\expandafter\tikz@anim@tl@early@options\expandafter\tikz@anim@exec@once\expandafter{\the\tikz@anim@once@count}{#1}}%
}%
\def\tikz@anim@add#1{\expandafter\def\expandafter\tikz@anim@tl@exec@options\expandafter{\tikz@anim@tl@exec@options#1}}%
\def\tikz@anim@add@once#1{%
  \global\advance\tikz@anim@once@count by1\relax%
  \expandafter\expandafter\expandafter\def\expandafter\expandafter\expandafter\tikz@anim@tl@exec@options%
  \expandafter\expandafter\expandafter{\expandafter\tikz@anim@tl@exec@options\expandafter\tikz@anim@exec@once\expandafter{\the\tikz@anim@once@count}{#1}}%
}%
\newcount\tikz@anim@once@count%
\def\tikz@anim@exec@once#1#2{%
  \expandafter\ifx\csname tikz@anim@once@#1\endcsname\pgf@stop%
  \else%
    \expandafter\let\csname tikz@anim@once@#1\endcsname\pgf@stop%
    #2%
  \fi%
}%

\newif\iftikz@anim@do@entry

\def\tikz@anim@make@entry{%
  \tikz@anim@do@entrytrue%
  \ifx\tikz@anim@tl@objects\pgfutil@empty\tikz@anim@do@entryfalse\fi%
  \ifx\tikz@anim@tl@attributes\pgfutil@empty\tikz@anim@do@entryfalse\fi%
  \ifx\tikz@anim@tl@exec@options\pgfutil@empty\ifx\tikz@anim@tl@early@options\pgfutil@empty\tikz@anim@do@entryfalse\fi\fi%
  \iftikz@anim@do@entry%
    \foreach\tikz@anim@tl@object in\tikz@anim@tl@objects{%
      \expandafter\tikzanimationattributesset\expandafter{\tikz@anim@tl@attributes}%
    }%
  \fi%
}%

\def\tikzanimationattributesset#1{\pgfqkeys{/tikz/animate/attributes}{#1}}%

\tikzanimationattributesset{
  .unknown/.code={
    \let\tikz@anim@attribute@name\pgfkeyscurrentname
    \expandafter\let\expandafter\pgf@temp\csname tikz@anim@def@pgf@attr@\tikz@anim@attribute@name\endcsname%
    \ifx\pgf@temp\relax%
      \tikzerror{Unknown animation attribute '\tikz@anim@attribute@name'}%
    \else%
      \expandafter\tikz@timeline@config\expandafter\tikz@anim@tl@object\expandafter\tikz@anim@attribute@name\expandafter\tikz@anim@tl@id\expandafter{\tikz@anim@configs}%
      \edef\pgf@marshal{\noexpand\tikz@timeline@entry{\tikz@anim@tl@object}{\tikz@anim@attribute@name}{\tikz@anim@tl@id}}%
      \expandafter\expandafter\expandafter\def\expandafter\expandafter\expandafter\pgf@marshal\expandafter\expandafter\expandafter{\expandafter\pgf@marshal\expandafter{\tikz@anim@tl@early@options}}%
      \expandafter\expandafter\expandafter\pgf@marshal\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\tikz@anim@entry\expandafter\expandafter\expandafter{\expandafter\tikz@anim@tl@exec@options\expandafter\def\expandafter\tikz@animation@time\expandafter{\tikz@animation@time}}}%
    \fi%
  }
}%
\let\tikz@anim@configs\pgfutil@empty

\def\tikz@anim@entry#1{%
  % Reset splines and value:
  \let\tikz@anim@result\pgfutil@empty%
  \pgf@anim@reset@linear%
  #1%
  \ifx\tikz@anim@result\pgfutil@empty%
  \else%
    \ifx\tikz@animation@time\pgfutil@empty%
    \else%
      \ifx\tikz@animation@time\tikz@anim@base@text%
        \expandafter\pgf@anim@base\expandafter{\tikz@anim@result}%
      \else%
        \expandafter\expandafter\expandafter\pgf@anim@entry%
        \expandafter\expandafter\expandafter{\expandafter\tikz@animation@time\expandafter}\expandafter{\tikz@anim@result}%
      \fi%
    \fi%
  \fi%
}%
\let\tikz@animation@time\pgfutil@empty%
\def\tikz@anim@base@text{base}%

\tikzanimateset{
  .unknown/.code={%
    \let\tikz@key\pgfkeyscurrentname%
    \tikz@animation@syntax@check{#1}{\tikz@anim@options{#1}}%
  }
}%


\def\tikz@anim@options#1{
  \let\tikz@anim@key\pgfkeyscurrentname%
  \pgfqkeys{/tikz/animate/options}{\tikz@anim@key/.try={#1}}%
  \ifpgfkeyssuccess%
  \else%
    \def\tikz@anim@unparsed@value{#1}%
    \expandafter\tikz@anim@time@test\tikz@anim@key\pgf@stop%
  \fi%
}%

\tikzanimateset{
  options/.cd,
  name/.code=\tikz@anim@add{\pgfanimationset{name={#1}}},
  forever/.code=\tikz@anim@add{\pgfanimationset{freeze at end}},
  freeze/.code=\tikz@anim@add{\pgfanimationset{freeze at end}},
  restart/.code=\tikz@anim@add{\pgfanimationset{restart={#1}}},
  repeats/.code=\tikz@anim@add{\pgfanimationset{repeats={#1}}},
  repeats/.default=,
  repeat/.code=\tikz@anim@add{\pgfanimationset{repeats={#1}}},
  repeat/.default=,
  begin/.code=\tikz@anim@add@once{\pgfanimationset{begin={#1}}},
  end/.code=\tikz@anim@add@once{\pgfanimationset{end={#1}}},
  begin on/.code=\tikz@anim@event{begin}{#1},
  end on/.code=\tikz@anim@event{begin}{#1},
  begin snapshot/.code=\tikz@anim@add{\pgfanimationset{begin snapshot={#1}}},
  origin/.code=\tikz@anim@parse@origin{#1},
  transform/.code=\tikz@anim@add{\pgfanimationset{transform={\let\tikz@transform\relax\tikzset{#1}}}},
  along/.code=\tikz@anim@handle@along#1\pgf@stop,
  entry control/.code=\tikz@anim@add{\pgfanimationset{entry control={#1}}},
  exit control/.code=\tikz@anim@add{\pgfanimationset{exit control={#1}}},
  stay/.code=\tikz@anim@add{\pgfanimationset{stay}},
  jump/.code=\tikz@anim@add{\pgfanimationset{jump}},
  ease/.style={
    entry control={1-(#1)}{1},
    exit control={#1}{0}
  },
  ease/.default=0.5,
  ease in/.style={
    entry control={1-(#1)}{1},
  },
  ease in/.default=0.5,
  ease out/.style={
    exit control={#1}{0},
  },
  ease out/.default=0.5,
  arrows/.code=\tikz@anim@add@early{\pgfanimationset{arrows={#1}}},
  shorten &gt;/.code=\tikz@anim@add@early{\pgfanimationset{shorten &gt;={#1}}},
  shorten &lt;/.code=\tikz@anim@add@early{\pgfanimationset{snorten &lt;={#1}}},
}%
\newif\iftikz@anim@along

\def\tikz@anim@t{0}%

\def\tikz@anim@handle@along#1{%
  \pgfutil@ifnextchar s{\tikz@anim@handle@sloped{#1}}{\tikz@anim@handle@upright{#1}}%
}%
\def\tikz@anim@handle@sloped#1sloped{%
  \pgfgettransform\tikz@anim@trans@pre%
  \expandafter\tikz@anim@add@once%
  \expandafter{%
    \expandafter\tikz@anim@along\expandafter{\tikz@anim@trans@pre}{#1}%
    \pgfsysanimkeycanvastransform{%
      \pgf@xc\pgf@pt@x%
      \pgf@yc\pgf@pt@y%
      \pgftransformreset%
      \pgf@pt@x\pgf@xc%
      \pgf@pt@y\pgf@yc%
      {\pgflowlevelsynccm}%
    }{\pgftransforminvert\pgflowlevelsynccm}%
    \pgfanimationset{rotate along=true}%
  }%
  \def\tikz@anim@configs{\tikz@anim@alongtrue}%
  \tikz@anim@handle@in%
}%
\def\tikz@anim@handle@upright#1upright{%
  \pgfgettransform\tikz@anim@trans@pre%
  \expandafter\tikz@anim@add@once%
  \expandafter{%
    \expandafter\tikz@anim@along\expandafter{\tikz@anim@trans@pre}{#1}%
    \pgfsysanimkeycanvastransform{}{}%
  }%
  \def\tikz@anim@configs{\tikz@anim@alongtrue}%
  \tikz@anim@handle@in%
}%
\def\tikz@anim@handle@in{%
  \pgfutil@ifnextchar i{\tikz@anim@handle@in@yes}{\tikz@anim@handle@in@no}%
}%
\def\tikz@anim@handle@in@no\pgf@stop{}%
\def\tikz@anim@handle@in@yes in#1\pgf@stop{%
  \tikzanimateset{scope={time=0,value=0,entry,time=#1,value=1,entry}}%
}%



\def\tikz@anim@event#1#2{%
  {%
    % evaluate #2 once to determine the id now
    \let\pgf@anim@id\pgfutil@empty%
    \pgfqkeys{/pgf/animation/events}{#2}%
  \expandafter}%
  \expandafter\def\expandafter\tikz@anim@temp@id\expandafter{\pgf@anim@id}%
  \ifx\tikz@anim@temp@id\pgfutil@empty%
    \def\tikz@temp{#1 on={of id=\tikz@anim@current@id,#2}}%
  \else
    \expandafter\tikz@anim@event@setter\expandafter{\tikz@anim@temp@id}{#1}{#2}%
  \fi%
  \expandafter\tikz@anim@add@once\expandafter{\expandafter\pgfanimationset\expandafter{\tikz@temp}}%
}%
\def\tikz@anim@event@setter#1#2#3{%
  \def\tikz@temp{#2 on={#3,of id=#1}}%
}%

\def\tikz@anim@time@test#1#2\pgf@stop{%
  \edef\tikz@temp{\meaning#1}%
  \expandafter\ifx\csname tikz@anim@test@\tikz@temp\endcsname\relax%
    \tikzerror{I do not know the timing key '#1#2' to which you passed '\tikz@anim@unparsed@value'}%
  \else%
    \expandafter\tikz@anim@sync@scope\expandafter{\tikz@anim@unparsed@value}{\tikz@anim@set@time{#1#2}}{\tikz@anim@make@entry}%
  \fi%
}%

\def\tikz@anim@parse@time#1{%
  \pgfutil@in@{later\pgf@stop}{#1\pgf@stop}%
  \ifpgfutil@in@%
    \tikz@anim@parse@later#1\pgf@stop%
  \else%
    \pgfparsetime{#1}\let\tikz@anim@t\pgftimeresult%
  \fi%
}%
\def\tikz@anim@parse@later#1later\pgf@stop{%
  \pgfparsetime{#1+\tikz@anim@t@current}\let\tikz@anim@t\pgftimeresult%
}%

\expandafter\let\csname tikz@anim@test@the character 0\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 1\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 2\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 3\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 4\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 5\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 6\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 7\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 8\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character 9\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character -\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character +\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character .\endcsname\pgfutil@empty
\expandafter\let\csname tikz@anim@test@the character (\endcsname\pgfutil@empty





% Configure an animation attribute
%
% #1 = tikz attribute name
% #2 = configuration
%
% Description:
%
% Sets up internals for the tikz attribute.

\def\tikzanimationdefineattribute#1#2{%
  \expandafter\def\csname tikz@anim@def@pgf@attr@#1\endcsname{#1}%
  \expandafter\let\csname tikz@anim@def@no@node@#1\endcsname\pgfutil@empty
  \expandafter\let\csname tikz@anim@def@is@node@#1\endcsname\pgfutil@empty
  \expandafter\let\csname tikz@anim@def@code@#1\endcsname\pgfutil@empty
  \expandafter\let\csname tikz@anim@def@parser@#1\endcsname\tikz@anim@simple@parse
  \def\tikz@anim@attr{#1}%
  \pgfkeys{/tikz/animate/@attrdef/.cd,#2}%
}%

\pgfkeys{/tikz/animate/@attrdef/.cd,
  pgf attribute name/.code=\expandafter\def\csname tikz@anim@def@pgf@attr@\tikz@anim@attr\endcsname{#1},
  pgf attribute name scope/.code=\expandafter\def\csname tikz@anim@def@pgf@attr@@scope@\tikz@anim@attr\endcsname{#1},
  pgf attribute name node/.code=\expandafter\def\csname tikz@anim@def@pgf@attr@@node@\tikz@anim@attr\endcsname{#1},
  scope type/.code=\expandafter\def\csname tikz@anim@def@no@node@\tikz@anim@attr\endcsname{#1},
  node type/.code=\expandafter\def\csname tikz@anim@def@is@node@\tikz@anim@attr\endcsname{#1},
  code/.code=\expandafter\def\csname tikz@anim@def@code@\tikz@anim@attr\endcsname{#1},
  setup/.code=\expandafter\def\csname tikz@anim@def@setup@\tikz@anim@attr\endcsname{#1},
  parser/.code=\expandafter\def\csname tikz@anim@def@parser@\tikz@anim@attr\endcsname{#1},
}%


% Configure an animation attribute list
%
% #1 = tikz attribute list name
% #2 = list of tikz attributes
%
% Description:
%
% Sets up internals for the tikz attribute.

\def\tikzanimationdefineattributelist#1#2{%
  \tikzanimationattributesset{#1/.style={#2}}%
}%




% Definition of the tikz attributes


\tikzanimationdefineattributelist{color}{@color,text}%
\tikzanimationdefineattribute{@color}{pgf attribute name=color,node type=.background}%
\tikzanimationdefineattribute{dash pattern}{pgf attribute name=dash,parser=dashpattern, node type=.background}%
\tikzanimationdefineattribute{dash phase}{pgf attribute name=dash,parser=dashoffset, node type=.background}%
\tikzanimationdefineattribute{dash}{parser=dash, node type=.background}%
\tikzanimationdefineattribute{draw opacity}{pgf attribute name=stroke opacity}%
\tikzanimationdefineattribute{draw}{pgf attribute name=stroke, node type=.background}%
\tikzanimationdefineattribute{fill opacity}{}%
\tikzanimationdefineattribute{fill}{node type=.background}%
\tikzanimationdefineattribute{line width}{node type=.background}%
\tikzanimationdefineattribute{path}{pgf attribute name=softpath, scope type=.path, node type=.background.path, parser=path}%
\tikzanimationdefineattribute{opacity}{}%
\tikzanimationdefineattribute{position}{%
  pgf attribute name=\iftikz@anim@along motion\else translate\fi,
  parser=\iftikz@anim@along simple\else position\fi,
  setup=\tikz@anim@position@setup,
}%
\tikzanimationdefineattribute{rotate}{}%
\tikzanimationdefineattribute{scale}{}%
\tikzanimationdefineattribute{shift}{
  pgf attribute name=\iftikz@anim@along motion\else translate\fi,
  parser=\iftikz@anim@along simple\else shift\fi
}%
\tikzanimationdefineattribute{stage}{}%
\tikzanimationdefineattribute{text opacity}{pgf attribute name=fill opacity, node type=.text, pgf attribute name scope=none}%
\tikzanimationdefineattribute{text}{pgf attribute name=color, node type=.text, pgf attribute name scope=none}%
\tikzanimationdefineattribute{view}{scope type=.view, parser=view}%
\tikzanimationdefineattribute{visible}{}%
\tikzanimationdefineattribute{xshift}{pgf attribute name=translate, parser=xshift}%
\tikzanimationdefineattribute{xscale}{pgf attribute name=scale, parser=xscale}%
\tikzanimationdefineattribute{xskew}{}%
\tikzanimationdefineattribute{xslant}{pgf attribute name=xskew, parser=slant}%
\tikzanimationdefineattribute{yshift}{pgf attribute name=translate, parser=yshift}%
\tikzanimationdefineattribute{yskew}{}%
\tikzanimationdefineattribute{yslant}{pgf attribute name=yskew, parser=slant}%
\tikzanimationdefineattribute{yscale}{pgf attribute name=scale, parser=yscale}%


\def\tikz@anim@position@setup{%
  \pgfgettransform\tikz@anim@saved@transform%
  \expandafter\def\expandafter\tikz@temp\expandafter{%
    \expandafter\def\expandafter\tikz@anim@saved@transform\expandafter{\tikz@anim@saved@transform}%
    \pgfsysanimkeycanvastransform{}{}%
    \tikz@anim@is@positiontrue%
  }%
  \expandafter\expandafter\expandafter\def%
  \expandafter\expandafter\expandafter\tikz@anim@initial@options%
  \expandafter\expandafter\expandafter{\expandafter\tikz@temp\tikz@anim@initial@options}%
}%
\newif\iftikz@anim@is@position


% The TikZ animation callbacks
%
% Description:
%
% The callbacks called by tikz.code.tex whenever an object is
% created. These callbacks will add the accumulated animation code.

\def\tikz@anim@id@hook{%
  \expandafter\ifx\csname tikz@anim@att@\tikz@id@name\endcsname\relax%
    % No named animation:
    % Now, check for auto animation:
    \expandafter\ifx\csname tikz@anim@att@\tikz@auto@id\endcsname\relax%
    \else%
      % Auto animation%
      \ifx\tikz@id@name\pgfutil@empty% Id set?
        % No, so set it
        \def\tikz@id@name{@auto}%
      \fi%
      \pgfidrefnextuse\tikz@anim@current@id\tikz@id@name%
      \csname tikz@anim@att@\tikz@auto@id\endcsname%
      \expandafter\global\expandafter\let\csname tikz@anim@att@\tikz@auto@id\endcsname\relax%
    \fi%
  \else%
    % Named animation:
    \pgfidrefnextuse\tikz@anim@current@id\tikz@id@name%
    \csname tikz@anim@att@\tikz@id@name\endcsname%
    \csname tikz@anim@att@\tikz@auto@id\endcsname% and unnamed animation
    \expandafter\global\expandafter\let\csname tikz@anim@att@\tikz@id@name\endcsname\relax%
    \expandafter\global\expandafter\let\csname tikz@anim@att@\tikz@auto@id\endcsname\relax%
  \fi%
}%

% Add hook:
\expandafter\def\expandafter\tikz@id@hook\expandafter{\tikz@id@hook\tikz@anim@id@hook}%



% Attaches an animation to a named object (named in tikz)
%
% #1 = name of the object. If equal to the special text "myself", the
%      next created object is meant.
% #2 = Animation code. When this code is executed, the following
%      things will be setup:
%
%      \iftikz@is@node will be set to true or false
%      depending on whether the name references a node.
%
%      \tikz@id@name will be set to the name of the object,
%      typically #1, except when #1 was ".", in this case another
%      name may have been used by the user, which will be used
%      instead.
%
% Description:
%
% After the call, the next time an object named #1 is created in TikZ
% (using name=#1), the code #2 will be executed inside a scope to
% create an animation of the object.

\def\tikzanimationattachto#1#2{%
  {%
    \def\tikz@anim@name{#1}%
    \ifx\tikz@anim@name\pgfutil@empty%
      \tikzerror{Trying to attach an animation to an unnamed object. This should not happen.}%
    \else%
      \expandafter\ifx\csname tikz@anim@att@\tikz@anim@name\endcsname\relax%
        \expandafter\gdef\csname tikz@anim@att@\tikz@anim@name\endcsname{#2}%
      \else%
        \expandafter\let\expandafter\tikz@temp\csname tikz@anim@att@\tikz@anim@name\endcsname%
        \expandafter\def\expandafter\tikz@temp\expandafter{\tikz@temp#2}%
        \expandafter\global\expandafter\let\csname tikz@anim@att@\tikz@anim@name\endcsname\tikz@temp%
      \fi%
    \fi%
  }%
}%
\def\tikz@auto@id{myself}%
\expandafter\let\csname tikz@anim@att@\tikz@auto@id\endcsname\relax%


% Add config code to a timeline
%
% #1 = The object (may be "myself")
% #2 = The attribute (see pgfanimateattribute)
% #3 = Timeline sequence identifier
% #4 = code
%
% Description:
%
% This commands adds the code to the timeline configuration, which is
% code that gets executed before the rest of entries of the timeline
% are executed.

\def\tikz@timeline@config#1#2#3#4{%
  \expandafter\def\expandafter\tikz@temp\expandafter{\csname tikz@a@conf@#1@#2@#3\endcsname}%
  \expandafter\ifx\tikz@temp\relax%
    \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\gdef\expandafter\expandafter\expandafter\tikz@temp\expandafter\expandafter\expandafter{\expandafter\expandafter\expandafter\global\expandafter\let\tikz@temp\relax}%
  \fi%
  \expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\expandafter\gdef\expandafter\expandafter\expandafter\tikz@temp\expandafter\expandafter\expandafter{\tikz@temp#4}%
}%



% Add a timeline entry
%
% #1 = The object (may be "myself")
% #2 = The attribute (see pgfanimateattribute)
% #3 = Timeline sequence identifier
% #4 = early code
% #5 = later code
%
% Description:
%
% This command stores an option with a timeline of an object. For each
% object--attribute--identifier tuple a timeline can be created, for
% which the values of #4 and #5 are collected. Later on, \pgfanimateattribute
% will be called for the pgf attribute associated with tikz attribute,
% the type associated with it and initial code, followed by the
% accumulated values of #4 and then the accumulated values of #5.

\def\tikz@timeline@entry#1#2#3#4#5{%
  % First, does the object have an animation already attached?
  \expandafter\ifx\csname tikz@a@tlo@#1\endcsname\relax%
    % No, first entry!
    % Create call:
    \edef\pgf@marshal{\noexpand\tikzanimationattachto{#1}{\expandafter\noexpand\csname tikz@a@tlo@#1\endcsname}}%
    \pgf@marshal%
    \expandafter\gdef\csname tikz@a@tlo@#1\endcsname{\tikz@anim@cleanup{#1}}%
  \fi%
  % Second, does the timeline exist?
  \expandafter\ifx\csname tikz@a@tlc@#1@#2@#3\endcsname\relax%
    % No, first entry!
    \def\tikz@anim@initial@early@options{#4}%
    \def\tikz@anim@initial@options{#5}%
    \csname tikz@anim@def@setup@#2\endcsname%
    % Create timeline...
    \expandafter\global\expandafter\let\csname tikz@a@tlc@#1@#2@#3\endcsname\tikz@anim@initial@options%
    \expandafter\global\expandafter\let\csname tikz@a@tld@#1@#2@#3\endcsname\tikz@anim@initial@early@options%
    % ...and add to calls
    \expandafter\let\expandafter\pgf@temp\csname tikz@a@tlo@#1\endcsname%
    \expandafter\def\expandafter\pgf@temp@name\expandafter{\tikz@anim@create{#1}{#2}{#3}}%
    \expandafter\expandafter\expandafter\def\expandafter\expandafter\expandafter\pgf@temp\expandafter\expandafter\expandafter{\expandafter\pgf@temp\pgf@temp@name}%
    \expandafter\global\expandafter\let\csname tikz@a@tlo@#1\endcsname\pgf@temp%
  \else%
    % Add to timeline:
    \expandafter\let\expandafter\pgf@temp\csname tikz@a@tld@#1@#2@#3\endcsname%
    \expandafter\def\expandafter\pgf@temp\expandafter{\pgf@temp#4}%
    \expandafter\global\expandafter\let\csname tikz@a@tld@#1@#2@#3\endcsname\pgf@temp%
    \expandafter\let\expandafter\pgf@temp\csname tikz@a@tlc@#1@#2@#3\endcsname%
    \expandafter\def\expandafter\pgf@temp\expandafter{\pgf@temp#5}%
    \expandafter\global\expandafter\let\csname tikz@a@tlc@#1@#2@#3\endcsname\pgf@temp%
  \fi%
}%


\def\tikz@anim@cleanup#1{%
  \expandafter\global\expandafter\let\csname tikz@a@tlo@#1\endcsname\relax%
}%

\def\tikz@anim@create#1#2#3{%
  \csname tikz@a@conf@#1@#2@#3\endcsname%
  \iftikz@is@node%
    \expandafter\let\expandafter\tikz@temp\csname tikz@anim@def@pgf@attr@@node@#2\endcsname%
  \else%
    \expandafter\let\expandafter\tikz@temp\csname tikz@anim@def@pgf@attr@@scope@#2\endcsname%
  \fi%
  \ifx\tikz@temp\relax%
    \expandafter\let\expandafter\tikz@temp\csname tikz@anim@def@pgf@attr@#2\endcsname%
  \fi%
  \expandafter\pgfanimateattributecode\expandafter{\tikz@temp}{%
    \iftikz@is@node%
      \edef\tikz@anim@whom{\tikz@id@name\csname tikz@anim@def@is@node@#2\endcsname}%
    \else%
      \edef\tikz@anim@whom{\tikz@id@name\csname tikz@anim@def@no@node@#2\endcsname}%
    \fi%
    \pgfanimationset{whom=\tikz@anim@whom}%
    \expandafter\let\expandafter\tikz@animation@parser\csname tikz@anim@\csname tikz@anim@def@parser@#2\endcsname @parse\endcsname%
    \csname tikz@anim@def@code@#2\endcsname%
    \csname tikz@a@tld@#1@#2@#3\endcsname%
    \csname tikz@a@tlc@#1@#2@#3\endcsname%
  }%
  \expandafter\global\expandafter\let\csname tikz@a@tlc@#1@#2@#3\endcsname\relax%
  \expandafter\global\expandafter\let\csname tikz@a@tld@#1@#2@#3\endcsname\relax%
}%




\endinput
</pre></body></html>