% Copyright 2019 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{tikzlibraryturtle.code.tex} \tikzset{turtle/.style={/tikz/turtle/.cd,#1}}% % The current angle is stored in this key. \tikzset{turtle/direction/.code=\gdef\tikz@lib@turtle@dir{#1},turtle/direction=90}% % The current angle is stored in this key. \tikzset{turtle/distance/.initial=1cm}% % The to path options that are used to move the turtle \tikzset{turtle/how/.style=}% % Let the turtle jump home \tikzset{turtle/home/.style={/tikz/insert path={(0,0) [turtle/direction=90]}}}% % Moves the turtle forward by the given distance or, if no distance is % given, by turtle distance \tikzset{ turtle/forward/.default=\pgfkeysvalueof{/tikz/turtle/distance}, turtle/forward/.style={/tikz/insert path={to[/tikz/turtle/how]++({\tikz@lib@turtle@dir}:{#1})}} }% % Moves the turtle backward by the given distance or, if no distance is % given, by turtle distance \tikzset{ turtle/back/.default=\pgfkeysvalueof{/tikz/turtle/distance}, turtle/back/.style={turtle forward=-#1} }% % Turns the turtle left by the given number of degrees \tikzset{ turtle/left/.default=90, turtle/left/.code={% \pgfmathparse{(#1)+(\tikz@lib@turtle@dir)}% \ifdim\pgfmathresult pt>360pt\relax% \pgfmathparse{\pgfmathresult-360}% \fi% \global\let\tikz@lib@turtle@dir\pgfmathresult } }% % Turns the turtle left by the given number of degrees \tikzset{ turtle/right/.default=90, turtle/right/.code={% \pgfmathparse{#1} \pgfmathparse{(\tikz@lib@turtle@dir)-\pgfmathresult}% \ifdim\pgfmathresult pt<0pt\relax% \pgfmathparse{\pgfmathresult+360}% \fi% \global\let\tikz@lib@turtle@dir\pgfmathresult } }% % Shortcuts: \tikzset{turtle/.cd, fd/.style={forward=#1}, fd/.default=\pgfkeysvalueof{/tikz/turtle/distance}, bk/.style={back=#1}, bk/.default=\pgfkeysvalueof{/tikz/turtle/distance}, lt/.style={left=#1}, lt/.default=90, rt/.style={right=#1}, rt/.default=90}% \endinput