% !TeX root = ./examples/marmot.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-marmots}[2022/06/17 version v1.0 Drawing marmots in TikZ]

\RequirePackage{tikz}
\RequirePackage{tikzlings-addons}
\usetikzlibrary{shadows.blur}
\usetikzlibrary{fadings} 

\tikzfading[name=marmot@blush,inner color=transparent!50,outer color=transparent!100]

\RequirePackage{expl3}
\ExplSyntaxOn
\ifdefined\sys_rand_seed:
  \pgfmathsetseed {\sys_rand_seed:}
\else
  \ifdefined\pdfrandomseed % pdflatex
  \else
      \ifdefined\randomseed 
        \let\pdfrandomseed\randomseed % post TL19 xelatex and lualatex
      \else
          \let\pdfrandomseed\time % pre TL19 xelatex
      \fi
  \fi
  \pgfmathsetseed{\number\pdfrandomseed} 
\fi
\ExplSyntaxOff

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

\newif\ifmarmot@blush
\newif\ifmarmot@whiskers
\newif\ifmarmot@teeth
\newif\ifmarmot@threeD
\newif\ifmarmot@shadow
\newif\ifmarmot@askphil
\newif\ifmarmot@leftstep
\newif\ifmarmot@rightstep
\newif\ifmarmot@back
\newif\ifmarmot@contour

\tikzset{
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Pass unknown keys on to tikz
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  /marmot/.search also={/tikz,/pgf,/thing},
  /marmot/.cd,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % body
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  body/.store in     = \marmot@body,
  body               = brown,
  eye/.store in      = \marmot@eye,
  eye                = \marmot@body!50!black,   
  mouth/.store in    = \marmot@mouth,
  mouth              = \marmot@body!50!black,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % options
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  blush/.code        = \marmot@blushtrue
                       \def\marmot@blushcolor{#1},
  blush/.default     = red, 
  whiskers/.code     = \marmot@whiskerstrue 
                       \def\marmot@whiskers{#1},
  whiskers/.default  = gray,
  teeth/.code        = \marmot@teethtrue    
                       \def\marmot@teeth{#1}, 
  teeth/.default     = white,
  3D/.code           = \marmot@threeDtrue,
  shadow/.code       = \marmot@shadowtrue,
  askphil/.code      = \marmot@askphiltrue,
  ask phil/.forward to = /marmot/askphil,
  leftstep/.code     = \marmot@leftsteptrue,
  left step/.forward to = /marmot/leftstep,
  rightstep/.code    = \marmot@rightsteptrue,
  right step/.forward to = /marmot/rightstep,  
  back/.code         = \marmot@backtrue,  
  contour/.code      = \marmot@contourtrue
                       \def\marmot@contour{#1}
                       \def\marmot@blushcolor{#1}
                       \def\marmot@mouth{#1},
  contour/.default   = black,  
  outline/.forward to = /marmot/contour,   
}

\def\marmot@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
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifmarmot@threeD
    \def\marmot@part@draw[##1]{\shade[ball color=##1]}
  \else% 3D
    \ifmarmot@contour
      \def\marmot@part@draw[##1]{\draw[##1,\marmot@contour,fill=white,line width=\scalingfactor*0.4pt]}
    \else% contour
      \def\marmot@part@draw[##1]{\fill[##1]}
    \fi% contour
  \fi% 3D
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % shadow
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname marmothookbackground\endcsname
  \csname tikzlinghookbackground\endcsname
  %
  \ifmarmot@askphil
    \pgfmathparse{int(random(1,120))}
    \let\marmot@random=\pgfmathresult
    \ifnum\marmot@random>17
      \marmot@shadowtrue
    \fi
  \fi% askphil
  %
  \ifmarmot@shadow
    \fill[opacity=0,blur shadow,] (0.3,0.5) ellipse[x radius=0.28, y radius=0.8, rotate=-80];
  \fi% shadow
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Body parts
  % 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifmarmot@leftstep
    \marmot@part@draw[\marmot@body!50!black] (-0.255,0.25) ellipse[x radius=0.23, y radius=0.09];  
  \else% step
    \marmot@part@draw[\marmot@body!50!black] (-0.255,0.2) ellipse[x radius=0.23, y radius=0.09];  
  \fi% step
  %
  \ifmarmot@rightstep
    \marmot@part@draw[\marmot@body!50!black] (0.255,0.25) ellipse[x radius=0.23, y radius=0.09]; 
  \else% step
    \marmot@part@draw[\marmot@body!50!black] (0.255,0.2) ellipse[x radius=0.23, y radius=0.09]; 
  \fi% step
  %
  % Ears %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \marmot@part@draw[\marmot@body!50!black] (0.255,2.03) ellipse[x radius=0.09, y radius=0.13];
  \marmot@part@draw[\marmot@body!50!black] (-0.255,2.03) ellipse[x radius=0.09, y radius=0.13];
  %
  % Tail %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \unless\ifmarmot@back
    \marmot@part@draw[\marmot@body!50!black] (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
  %
  % Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \marmot@part@draw[\marmot@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 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifmarmot@back
    \marmot@part@draw[\marmot@body!50!black] (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
  %
  % Belly %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \unless\ifmarmot@back
    \marmot@part@draw[\marmot@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 marmothookbelly\endcsname
  \csname tikzlinghookbelly\endcsname
  %
  % Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \unless\ifmarmot@back
    %
    % Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \marmot@part@draw[\marmot@body!50!black] (0.385,0.93) ellipse[x radius=0.24, y radius=0.13, rotate=70];
    \marmot@part@draw[\marmot@body!50!black] (-0.385,0.93) ellipse[x radius=0.24, y radius=0.13, rotate=-70];
    %
    % Muzzle %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \marmot@part@draw[\marmot@body!50!white] (0,1.47) ellipse[x radius=0.23, y radius=0.13]; 
    %
    % Nose %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \marmot@part@draw[\marmot@body!50!black] (0,1.6) circle[radius=0.08];
    %
    % Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \marmot@part@draw[\marmot@eye] (-0.155,1.77) circle[radius=0.05]; 
    \marmot@part@draw[\marmot@eye] (0.155,1.77) circle[radius=0.05]; 
    %
    % Mouth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \fill[\marmot@mouth] (0.145,1.51) arc [start angle=-20, end angle=-160, radius=0.16] -- (-0.14,1.51) -- (-0.14,1.51) arc [start angle=-160, end angle=-20, radius=0.144] -- cycle ;
    %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %
    % optional
    %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %
    % Blushed %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \ifmarmot@blush
      \fill[\marmot@blushcolor,path fading=marmot@blush] (-0.295,1.6) circle[radius=0.1]; 
      \fill[\marmot@blushcolor,path fading=marmot@blush] (0.295,1.6) circle[radius=0.1];   
    \fi% blush
    %
    % Wiskers %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \ifmarmot@whiskers
      \fill[\marmot@whiskers] (0.0788, 1.6146) .. controls (0.1658, 1.6299) and (0.2086, 1.5639) .. (0.2956, 1.5486) -- (0.2956, 1.5586) .. controls (0.2097, 1.5737) and (0.1648, 1.6297) .. (0.0788, 1.6146) -- cycle;
      \fill[\marmot@whiskers] (-0.0788, 1.6146) .. controls (-0.1658, 1.6299) and (-0.2087, 1.5639) .. (-0.2956, 1.5486) -- (-0.2956, 1.5586) .. controls (-0.2097, 1.5737) and (-0.1648, 1.6297) .. (-0.0788, 1.6146) -- cycle;
      \fill[\marmot@whiskers] (0.0752, 1.6281) .. controls (0.1583, 1.6583) and (0.2171, 1.6309) .. (0.3002, 1.6007) -- (0.3002, 1.6107) .. controls (0.2174, 1.6408) and (0.158, 1.6582) .. (0.0752, 1.6281) -- cycle;
      \fill[\marmot@whiskers] (-0.0752, 1.6281) .. controls (-0.1583, 1.6583) and (-0.2171, 1.6309) .. (-0.3002, 1.6007) -- (-0.3002, 1.6107) .. controls (-0.2174, 1.6408) and (-0.158, 1.6582) .. (-0.0752, 1.6281) -- cycle;
      \fill[\marmot@whiskers] (0.0671, 1.6443) .. controls (0.1414, 1.6925) and (0.2182, 1.7164) .. (0.2925, 1.6682) -- (0.2925, 1.6782) .. controls (0.2179, 1.7266) and (0.1417, 1.6927) .. (0.0671, 1.6443) -- cycle;
      \fill[\marmot@whiskers] (-0.0671, 1.6443) .. controls (-0.1414, 1.6925) and (-0.2182, 1.7164) .. (-0.2925, 1.6682) -- (-0.2925, 1.6782) .. controls (-0.2179, 1.7266) and (-0.1417, 1.6927) .. (-0.0671, 1.6443) -- cycle;
    \fi% whiskers
    %
    % Teeth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \ifmarmot@teeth
      \fill[\marmot@body!50!black] (0.048,1.413) rectangle (-0.048,1.373);
      \fill[\marmot@teeth] (-0.045,1.407) rectangle (-0.004,1.376);
      \fill[\marmot@teeth] (0.045,1.407) rectangle (0.004,1.376);  
    \fi% teeth
    %
  \fi% back
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname marmothookbody\endcsname
  \csname tikzlinghookbody\endcsname
  %
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Marmot]{Phil, the marmot}
%
%\emph{Phil got his name from Punxsutawney Phil, the famous weather forecasting groundhog}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[lower separated=false, lefthand width=.8\linewidth]
%\vspace*{0.5cm}
%\lstinline|\usepackage{tikzlings-marmots}| 
%\vspace*{0.5cm}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{}
%\marmot
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic marmot can be modified by changing its colour:
%\begin{tcblisting}{}
%\marmot[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of various body parts can be adjusted:
%\begin{tcblisting}{}
%\marmot[eye=red]
%\end{tcblisting}
%\begin{tcblisting}{}
%\marmot[mouth=red]
%\end{tcblisting}
%
%The marmot can also blush
%\begin{tcblisting}{}
%\marmot[blush=red]
%\end{tcblisting}
%
%and whiskers can be added:
%\begin{tcblisting}{}
%\marmot[whiskers=gray]
%\end{tcblisting}
%
%Some marmots even show their chisel teeth:
%\begin{tcblisting}{}
%\marmot[teeth=white]
%\end{tcblisting}
%
%or can cast a shadow:
%\begin{tcblisting}{}
%\marmot[shadow]
%\end{tcblisting}
%
%This ability is important if you want to ask Punxsutawney Phil\footnote{\url{https://en.wikipedia.org/wiki/Punxsutawney_Phil}} on Groundhog Day how the weather is going to be. With a probability derived from the statistics of 120 Groundhog Days\footnote{\hbadness=99999\url{https://www.livescience.com/32974-punxsutawney-phil-weather-prediction-accuracy.html}} the option \lstinline|askphil| might or might not result in a shadow.
%\begin{tcblisting}{}
%\marmot[askphil]
%\end{tcblisting}
%
%If a good weather prognosis is derived, the happy marmot can dance by lifting up its left and right foot: 
%\begin{tcblisting}{}
%\marmot[leftstep]
%\marmot[rightstep,xshift=2cm]
%\end{tcblisting}
%
%To view the marmot from behind:
%\begin{tcblisting}{}
%\marmot[back]
%\end{tcblisting}
%
%The key \lstinline|3D| will make the marmot 3-dimensional:
%\begin{tcblisting}{}
%\marmot[3D]
%\end{tcblisting}
%
%And finally the \lstinline|contour| key will only draw the outlines:
%\begin{tcblisting}{}
%\marmot[contour=black]
%\end{tcblisting}