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 % !TeX root = ./examples/mole.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 http://www.latex-project.org/lppl.txt
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ProvidesPackage{tikzlings-moles}[2021/08/06 version v0.8 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 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname moleshookforeground\endcsname
  \csname tikzlinghookforeground\endcsname
  %   
}

\newif\ifmoles@threeD
\newif\ifmoles@back
\newif\ifmoles@contour

\tikzset{
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Pass unknown keys on to tikz
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  /moles/.search also={/tikz,/pgf,/thing},
  /moles/.cd,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % body
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  body/.code         = \def\moles@body{#1},
  body               = gray,
  eye/.code          = \def\moles@eye{#1},
  eye                = \moles@body!60!black,   
  feet/.code         = \def\moles@feet{#1},
  feet               = red!20!white!50!brown,
  hands/.code        = \def\moles@hands{#1},
  hands              = red!20!white!50!brown,  
  muzzle/.code       = \def\moles@muzzle{#1},
  muzzle             = red!20!white!50!brown, 
  mouth/.code        = \def\moles@mouth{#1},
  mouth              = \moles@body!60!black,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % options
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  3D/.code           = \moles@threeDtrue,  
  back/.code         = \moles@backtrue,  
  contour/.code      = \moles@contourtrue
                       \def\moles@contour{#1}
                       \def\moles@mouth{#1}
                       \def\moles@eye{#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 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname moleshookbackground\endcsname
  \csname tikzlinghookbackground\endcsname
  %
  % Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \moles@part@draw[\moles@feet] (-0.255,0.2) ellipse[x radius=0.23, y radius=0.09];  
  \moles@part@draw[\moles@feet] (0.255,0.2) ellipse[x radius=0.23, y radius=0.09]; 
  %
  % 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 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \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@eye] (-0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=-15]; 
      \fill[\moles@eye!50!black] (0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=15]; 
    \else% 3D
      \fill[\moles@eye] (-0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=-15]; 
      \fill[\moles@eye] (0.165,1.79) ellipse[x radius=0.055, y radius=0.015, rotate=15]; 
    \fi% 3D
    %
    % Mouth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \draw[\moles@mouth, line width=\scalingfactor*0.4pt] (0.145,1.51) arc [start angle=-20, end angle=-160, radius=0.16] ;
    %
  \fi% back
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \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}[lower separated=false, lefthand width=.8\linewidth]
%\vspace*{0.5cm}
%\lstinline|\usepackage{tikzlings-moles}| 
%\vspace*{0.5cm}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\textcolor{red!60!black}{\textbf{Attention:} In contrast to the other \tikzlings the macro name is the plural form to avoid conflicts with  \lstinline|siunitx| and similar packages.}
%\begin{tcblisting}{}
%\moles
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic mole can be modified by changing its colour:
%\begin{tcblisting}{}
%\moles[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of various body parts can be adjusted:
%\begin{tcblisting}{}
%\moles[eye=red]
%\end{tcblisting}
%
%\begin{tcblisting}{}
%\moles[muzzle=red]
%\end{tcblisting}
%
%\begin{tcblisting}{}
%\moles[hands=red]
%\end{tcblisting}
%
%\begin{tcblisting}{}
%\moles[feet=red]
%\end{tcblisting}
%
%\begin{tcblisting}{}
%\moles[mouth=red]
%\end{tcblisting}
%
%To view the mole from behind:
%\begin{tcblisting}{}
%\moles[back]
%\end{tcblisting}
%
%The key \lstinline|3D| will make the mole 3-dimensional:
%\begin{tcblisting}{}
%\moles[3D]
%\end{tcblisting}
%
%And finally the \lstinline|contour| key will only draw the outlines:
%\begin{tcblisting}{}
%\moles[contour=black]
%\end{tcblisting}