% !TeX root = ./examples/moles.tex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% This package is part of the TikZlings package
%% A package to bring cute little animals and other beings into tikz
%% Maintained by samcarter
%%
%% Project repository and bug tracker:
%% https://github.com/samcarter/tikzlings
%%
%% Released under the LaTeX Project Public License v1.3c or later
%% See https://www.latex-project.org/lppl.txt
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ProvidesPackage{tikzlings-moles}[2025/03/23 version v2.3 Drawing moles in TikZ]

\RequirePackage{tikz}
\RequirePackage{tikzlings-addons}

\newcommand*{\moles}[1][]{%
 \begin{scope}%
   \tikzset{/moles/.cd,#1}%
   \moles@draw%
 \end{scope}%
 \thing[#1]%
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/moles/foreground}
 \UseHook{tikzlings/foreground}
 \csname moleshookforeground\endcsname
 \csname tikzlinghookforeground\endcsname
 %
}

\newif\ifmoles@threeD
\newif\ifmoles@leftstep
\newif\ifmoles@rightstep
\newif\ifmoles@back
\newif\ifmoles@contour
\newif\ifmoles@openmouth

\NewHook{tikzlings/moles/background}
\NewHook{tikzlings/moles/belly}
\NewHook{tikzlings/moles/body}
\NewHook{tikzlings/moles/foreground}

\tikzset{
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Pass unknown keys on to tikz
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 /moles/.search also={/tikz,/pgf,/thing},
 /moles/.cd,
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % body
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 body/.store in     = \moles@body,
 body               = gray,
 eyes/.store in     = \moles@eyes,
 eyes               = \moles@body!60!black,
 eye/.forward to    = /moles/eyes,
 feet/.store in     = \moles@feet,
 feet               = red!20!white!50!brown,
 foot/.forward to   = /moles/feet,
 hands/.store in    = \moles@hands,
 hands              = red!20!white!50!brown,
 hand/.forward to   = /moles/hands,
 muzzle/.store in   = \moles@muzzle,
 muzzle             = red!20!white!50!brown,
 mouth/.store in    = \moles@mouth,
 mouth              = \moles@body!60!black,
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % options
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 openmouth/.code    = \moles@openmouthtrue,
 open mouth/.forward to = /moles/openmouth,
 3D/.code           = \moles@threeDtrue,
 leftstep/.code     = \moles@leftsteptrue,
 left step/.forward to = /moles/leftstep,
 rightstep/.code    = \moles@rightsteptrue,
 right step/.forward to = /moles/rightstep,
 back/.code         = \moles@backtrue,
 contour/.code      = \moles@contourtrue
                      \def\moles@contour{#1}
                      \def\moles@mouth{#1}
                      \def\moles@eyes{#1},
 contour/.default   = black,
 outline/.forward to = /moles/contour,
}

\def\moles@draw{%
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % minimal bounding box size
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \path (-0.625,0.1) rectangle (0.905, 2.17);
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % store the current scale factor
 % from https://github.com/samcarter/tikzlings/issues/3#issuecomment-461373494
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \pgfgettransformentries{\tmpscaleA}{\tmpscaleB}{\tmpscaleC}{\tmpscaleD}{\tmp}{\tmp}%
 \pgfmathsetmacro{\scalingfactor}{sqrt(abs(\tmpscaleA*\tmpscaleD-\tmpscaleB*\tmpscaleC))*sqrt(abs((\pgf@xx/1cm)*(\pgf@yy/1cm)-(\pgf@xy/1cm)*(\pgf@yx/1cm)))}%
 \pgfmathsetmacro{\xscalefactor}{\tmpscaleA}
 \pgfmathsetmacro{\yscalefactor}{\tmpscaleD}
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % switch between 2D, 3D and contours, from
 % https://chat.stackexchange.com/transcript/message/45991801#45991801
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \ifmoles@threeD
   \def\moles@part@draw[##1]{\shade[ball color=##1]}
 \else% 3D
   \ifmoles@contour
     \def\moles@part@draw[##1]{\draw[##1,\moles@contour,fill=white,line width=\scalingfactor*0.4pt]}
   \else% contour
     \def\moles@part@draw[##1]{\fill[##1]}
   \fi% contour
 \fi% 3D
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Body parts
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/moles/background}
 \UseHook{tikzlings/background}
 \csname moleshookbackground\endcsname
 \csname tikzlinghookbackground\endcsname
 %
 % Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \ifmoles@leftstep
   \moles@part@draw[\moles@feet] (-0.255,0.25) ellipse[x radius=0.23, y radius=0.09];
 \else% step
   \moles@part@draw[\moles@feet] (-0.255,0.2) ellipse[x radius=0.23, y radius=0.09];
 \fi% step
 \ifmoles@rightstep
   \moles@part@draw[\moles@feet] (0.255,0.25) ellipse[x radius=0.23, y radius=0.09];
 \else% step
   \moles@part@draw[\moles@feet] (0.255,0.2) ellipse[x radius=0.23, y radius=0.09];
 \fi% step
 %
 % Tail %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \unless\ifmoles@back
   \moles@part@draw[\moles@body] (0.8856, 0.6504) .. controls (0.8656, 0.3803) and (0.0267, 0.2202) .. (0.0167, 0.4203) .. controls (-0.0033, 0.5404) and (0.1104, 0.4397) .. (0.3951, 0.4803) .. controls (0.6557, 0.5175) and (0.8856, 0.7005) .. (0.8856, 0.6504);
 \fi% back
 %
 % Hair %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \moles@part@draw[\moles@body] (-0.09, 2.06) .. controls (-0.09, 2.06) and (-0.13, 2.25) .. (-0.07, 2.27) .. controls (-0.09, 2.13) and (0.04, 2.08) .. (0.04, 2.08) .. controls (0.04, 2.08) and (0.02, 2.20) .. (0.06, 2.21) .. controls (0.06, 2.11) and (0.13, 2.08) .. (0.13, 2.08) -- cycle;
 %
 % Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \moles@part@draw[\moles@body] (0.595, 0.92) .. controls (0.595, 0.26) and (0.355, 0.18) .. (0, 0.18) .. controls (-0.355, 0.18) and (-0.595, 0.26) .. (-0.595, 0.92) .. controls (-0.605, 1.58) and (-0.335, 2.11) .. (0, 2.11) .. controls (0.335, 2.11) and (0.605, 1.58) .. (0.595, 0.92) -- cycle;
 %
 % Tail if back %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \ifmoles@back
   \moles@part@draw[\moles@body] (0.8856, 0.6504) .. controls (0.8656, 0.3803) and (0.0267, 0.2202) .. (0.0167, 0.4203) .. controls (-0.0033, 0.5404) and (0.1104, 0.4397) .. (0.3951, 0.4803) .. controls (0.6557, 0.5175) and (0.8856, 0.7005) .. (0.8856, 0.6504) -- cycle;
 \fi% back
 %
 % Belly %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \unless\ifmoles@back
   \moles@part@draw[\moles@body!50!white] (0.425, 0.71) .. controls (0.425, 0.41) and (0.245, 0.37) .. (0, 0.37) .. controls (-0.245, 0.37) and (-0.425, 0.41) .. (-0.425, 0.71) .. controls (-0.425, 1.01) and (-0.225, 1.26) .. (0, 1.26) .. controls (0.225, 1.26) and (0.425, 1.01) .. (0.425, 0.71) -- cycle;
 \fi% back
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/moles/belly}
 \UseHook{tikzlings/belly}
 \csname moleshookbelly\endcsname
 \csname tikzlinghookbelly\endcsname
 %
 % Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \unless\ifmoles@back
   %
   % Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \moles@part@draw[\moles@body] (0.37,0.86) ellipse[x radius=0.27, y radius=0.13, rotate=70];
   \moles@part@draw[\moles@body] (-0.37,0.86) ellipse[x radius=0.27, y radius=0.13, rotate=-70];
   %
   % Hands %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \ifmoles@contour
     \moles@part@draw[] (-0.37,0.6) -- (-0.32,0.53) -- (-0.3,0.6) -- (-0.23,0.55) -- (-0.23,0.64) -- (-0.16,0.59) -- (-0.18,0.67) -- cycle;
     \moles@part@draw[] (0.37,0.6) -- (0.32,0.53) -- (0.3,0.6) -- (0.23,0.55) -- (0.23,0.64) -- (0.16,0.59) -- (0.18,0.67) -- cycle;
   \else% contour
     \fill[white] (-0.37,0.6) -- (-0.32,0.53) -- (-0.3,0.6) -- (-0.23,0.55) -- (-0.23,0.64) -- (-0.16,0.59) -- (-0.18,0.67) -- cycle;
     \fill[white] (0.37,0.6) -- (0.32,0.53) -- (0.3,0.6) -- (0.23,0.55) -- (0.23,0.64) -- (0.16,0.59) -- (0.18,0.67) -- cycle;
   \fi% contour
   \moles@part@draw[\moles@hands] (0.285,0.65) ellipse[x radius=0.08, y radius=0.13, rotate=70];
   \moles@part@draw[\moles@hands] (-0.285,0.65) ellipse[x radius=0.08, y radius=0.13, rotate=-70];
   %
   % Muzzle %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \moles@part@draw[\moles@muzzle] ( 0.22, 1.46) .. controls ( 0.22, 1.50) and ( 0.22, 1.53) .. ( 0.17, 1.56) .. controls ( 0.11, 1.58) and ( 0.05, 1.66) .. ( 0.00, 1.66) .. controls (-0.05, 1.66) and (-0.11, 1.58) .. (-0.17, 1.56) .. controls (-0.22, 1.53) and (-0.22, 1.50) .. (-0.22, 1.46) .. controls (-0.22, 1.39) and (-0.14, 1.33) .. ( 0.00, 1.33) .. controls ( 0.14, 1.33) and ( 0.22, 1.39) .. ( 0.22, 1.46) -- cycle;
   %
   % Nose %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \moles@part@draw[\moles@body!60!black] (0,1.67) circle[radius=0.055];
   %
   % Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \ifmoles@threeD
     \fill[\moles@eyes] (-0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=-15];
     \fill[\moles@eyes!50!black] (0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=15];
   \else% 3D
     \fill[\moles@eyes] (-0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=-15];
     \fill[\moles@eyes] (0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=15];
   \fi% 3D
   %
   % Mouth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \ifmoles@openmouth
     \filldraw[\moles@mouth, line width=\scalingfactor*0.4pt] (0.145,1.51) arc [start angle=-20, end angle=-160, radius=0.16] ;
   \else
     \draw[\moles@mouth, line width=\scalingfactor*0.4pt] (0.145,1.51) arc [start angle=-20, end angle=-160, radius=0.16];
   \fi
   %
 \fi% back
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/moles/body}
 \UseHook{tikzlings/body}
 \csname moleshookbody\endcsname
 \csname tikzlinghookbody\endcsname
 %
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Mole]{Wilhelm, the mole}
%
%\emph{The mole was added in celebration of the international mole day and is named after the chemist Wilhelm Ostwald}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[title={Package usage}]
%\begin{samcode}
%\usepackage{tikzlings-moles}
%\end{samcode}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\textcolor{samred}{\textbf{Attention:} In contrast to the other \tikzlings the macro name is the plural form to avoid conflicts with  \saminline|siunitx| and similar packages.}
%\begin{tcblisting}{title={Basic mole}}
%\moles
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic mole can be modified by changing its colour:
%\begin{tcblisting}{title={Body colour}}
%\moles[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of various body parts can be adjusted:
%\begin{tcblisting}{title={Eye colour}}
%\moles[eyes=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Muzzle colour}}
%\moles[muzzle=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Hand colour}}
%\moles[hands=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Foot colour}}
%\moles[feet=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Mouth colour}}
%\moles[mouth=red]
%\end{tcblisting}
%
% The mole can open its mouth:
%\begin{tcblisting}{title={Open mouth}}
%\moles[openmouth]
%\end{tcblisting}
%
%And the mole can lift its legs:
%\begin{tcblisting}{title={Walking}}
%\moles[leftstep]
%\moles[rightstep,xshift=2cm]
%\end{tcblisting}
%
%To view the mole from behind:
%\begin{tcblisting}{title={Back view}}
%\moles[back]
%\end{tcblisting}
%
%The key \saminline|3D| will make the mole 3-dimensional:
%\begin{tcblisting}{title={3D view}}
%\moles[3D]
%\end{tcblisting}
%
%And finally the \saminline|contour| key will only draw the outlines:
%\begin{tcblisting}{title={Contours}}
%\moles[contour=black]
%\end{tcblisting}

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