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

\RequirePackage{tikz}
\RequirePackage{tikzlings-addons}
\usetikzlibrary{decorations.pathmorphing}
\usetikzlibrary{fadings}

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

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

\newif\ifsheep@threeD
\newif\ifsheep@monocle
\newif\ifsheep@blush
\newif\ifsheep@back
\newif\ifsheep@contour

\tikzset{
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Pass unknown keys on to tikz
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  /sheep/.search also={/tikz,/pgf,/thing},
  /sheep/.cd,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % body
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  body/.store in     = \sheep@body,
  body               = brown!50!darkgray!97!yellow,
  eye/.store in      = \sheep@eye,
  eye                = \sheep@body!50!black, 
  nose/.store in     = \sheep@nose,
  nose               = \sheep@body!50!black,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % options
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  blush/.code        = \sheep@blushtrue
                       \def\sheep@blushcolor{#1},
  blush/.default     = red, 
  monocle/.code      = \sheep@monocletrue,
  3D/.code           = \sheep@threeDtrue, 
  back/.code         = \sheep@backtrue,  
  contour/.code      = \sheep@contourtrue
                       \def\sheep@contour{#1}
                       \def\sheep@blushcolor{#1}
                       \def\sheep@nose{#1},
  contour/.default   = black,  
  outline/.forward to = /sheep/contour,  
}

\def\sheep@draw{%
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % minimal bounding box size 
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \path (-0.7,0.08) rectangle (0.7,2.33);
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % 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
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifsheep@threeD
    \def\sheep@part@draw[##1]{\shade[ball color=##1]}
  \else% 3D
    \ifsheep@contour
      \def\sheep@part@draw[##1]{\draw[##1,\sheep@contour,fill=white,line width=\scalingfactor*0.4pt]}
    \else% contour
      \def\sheep@part@draw[##1]{\fill[##1]}
    \fi% contour
  \fi% 3D
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Body parts
  % 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname sheephookbackground\endcsname
  \csname tikzlinghookbackground\endcsname
  % 
  % Ears %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \sheep@part@draw[\sheep@body] (0.22, 2.0392) .. controls   (0.22, 2.1584) and   (0.49460, 2.255) ..   (0.49460, 2.255) .. controls   (0.49460, 2.255) and (0.5300, 1.86) .. (0.3721, 1.86) .. controls (0.2891, 1.86) and   (0.22, 1.9201) .. (0.22, 2.0392) -- cycle;
  \sheep@part@draw[\sheep@body!55!white] (0.22, 2.0392) .. controls (0.26, 2.1584) and (0.47, 2.22) .. (0.47, 2.20) .. controls (0.47, 2.2) and (0.49, 1.9) .. (0.3721, 1.9) .. controls (0.2891, 1.88) and (0.22, 1.88) .. (0.22, 2.0392) -- cycle;  
  \sheep@part@draw[\sheep@body] (-0.22, 2.0392) .. controls   (-0.22, 2.1584) and   (-0.49460, 2.255) ..   (-0.49460, 2.255) .. controls   (-0.49460, 2.255) and (-0.5300, 1.86) .. (-0.3721, 1.86) .. controls (-0.2891, 1.86) and   (-0.22, 1.9201) .. (-0.22, 2.0392) -- cycle;
  \sheep@part@draw[\sheep@body!55!white] (-0.22, 2.0392) .. controls (-0.26, 2.1584) and (-0.47, 2.22) .. (-0.47, 2.20) .. controls (-0.47, 2.2) and (-0.49, 1.9) .. (-0.3721, 1.9) .. controls (-0.2891, 1.88) and (-0.22, 1.88) .. (-0.22, 2.0392) -- cycle;  
  % 
  % Feet if back %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifsheep@back
    \sheep@part@draw[\sheep@body] (0.3216,0.15) arc (-15:195:0.12) -- (0.16,0.15) to [bend left] (0.25,0.15) -- cycle;
    \sheep@part@draw[\sheep@body] (-0.3216,0.15) arc (195:-15:0.12) -- (-0.16,0.15) to[bend right] (-0.25,0.15) --cycle;
  \fi% back
  %
  % Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \sheep@part@draw[\sheep@body!50!darkgray,decorate,decoration={bumps,amplitude=\scalingfactor*2.5pt,segment length=\scalingfactor*10pt}] (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;
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname sheephookbelly\endcsname
  \csname tikzlinghookbelly\endcsname
  %
  % Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \unless\ifsheep@back
    \sheep@part@draw[\sheep@body!45!white!95!orange] (-0.2402, 0.9823) .. controls (-0.2994, 1.0582) and (-0.3721, 1.0651) .. (-0.4024, 0.9978) .. controls (-0.4327, 0.9305) and (-0.4092, 0.8145) .. (-0.35, 0.7386) .. controls (-0.3311, 0.7145) and (-0.3101, 0.6964) .. (-0.289, 0.6862) .. controls (-0.2755, 0.7023) and (-0.2498, 0.7563) .. (-0.2498, 0.7563) .. controls (-0.2498, 0.7563) and (-0.1790, 0.731) .. (-0.1611, 0.746) .. controls (-0.1611, 0.746) and (-0.1809, 0.9064) .. (-0.2402, 0.9823) -- cycle;
    \sheep@part@draw[\sheep@body!45!white!95!orange] (0.2402, 0.9823) .. controls (0.2994, 1.0582) and (0.3721, 1.0651) .. (0.4024, 0.9978) .. controls (0.4327, 0.9305) and (0.4092, 0.8145) .. (0.35, 0.7386) .. controls (0.3311, 0.7145) and (0.3101, 0.6964) .. (0.289, 0.6862) .. controls (0.2755, 0.7023) and (0.2498, 0.7563) .. (0.2498, 0.7563) .. controls (0.2498, 0.7563) and (0.1790, 0.731) .. (0.1611, 0.746) .. controls (0.1611, 0.746) and (0.1809, 0.9064) .. (0.2402, 0.9823) -- cycle;
  \fi% back
  %
  % Hair %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \sheep@part@draw[\sheep@body!50!darkgray,decorate,decoration={bumps,amplitude=\scalingfactor*2.5pt,segment length=\scalingfactor*10pt}] (-0.275,1.98) -- (-0.2,2.2)  -- (-0.008,2.2) -- (0.2,2.2) -- (0.275,1.98) -- cycle;
  %
  % Tail if back %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifsheep@back
    \sheep@part@draw[\sheep@body!45!white!95!orange,rounded corners=\scalingfactor*0.1pt] (0,0.7) -- (0.08, 0.3236) arc (0:-180:\scalingfactor*2pt) -- cycle;
  \fi% back
  %
  % Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \unless\ifsheep@back
    %
    % Head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \sheep@part@draw[\sheep@body!45!white!95!orange] (0.4, 1.8) .. controls (0.4, 1.5) and (0.2, 1.25) .. (0, 1.16) .. controls (-0.2, 1.25) and (-0.4, 1.5) .. (-0.4, 1.8) .. controls (-0.34, 2.3) and (0.34, 2.3) .. (0.4, 1.8) -- cycle;
    %
    % Ears %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \sheep@part@draw[\sheep@body] (0.22, 2.0392) .. controls   (0.22, 2.1584) and   (0.49460, 2.255) ..   (0.49460, 2.255) .. controls   (0.49460, 2.255) and (0.5300, 1.86) .. (0.3721, 1.86) .. controls (0.2891, 1.86) and   (0.22, 1.9201) .. (0.22, 2.0392) -- cycle;
    \sheep@part@draw[\sheep@body!55!white] (0.22, 2.0392) .. controls (0.26, 2.1584) and (0.47, 2.22) .. (0.47, 2.20) .. controls (0.47, 2.2) and (0.49, 1.9) .. (0.3721, 1.9) .. controls (0.2891, 1.88) and (0.22, 1.88) .. (0.22, 2.0392) -- cycle;  
    \sheep@part@draw[\sheep@body] (-0.22, 2.0392) .. controls   (-0.22, 2.1584) and   (-0.49460, 2.255) ..   (-0.49460, 2.255) .. controls   (-0.49460, 2.255) and (-0.5300, 1.86) .. (-0.3721, 1.86) .. controls (-0.2891, 1.86) and   (-0.22, 1.9201) .. (-0.22, 2.0392) -- cycle;
    \sheep@part@draw[\sheep@body!55!white] (-0.22, 2.0392) .. controls (-0.26, 2.1584) and (-0.47, 2.22) .. (-0.47, 2.20) .. controls (-0.47, 2.2) and (-0.49, 1.9) .. (-0.3721, 1.9) .. controls (-0.2891, 1.88) and (-0.22, 1.88) .. (-0.22, 2.0392) -- cycle;  
    % 
    % Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \unless\ifsheep@back
      \sheep@part@draw[\sheep@eye] (0.2, 1.66) circle[radius=0.06];
      \sheep@part@draw[\sheep@eye] (-0.2, 1.66) circle[radius=0.06];
    \fi% back
    %
    % Nose %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \draw[\sheep@nose,line width=\scalingfactor*0.8pt,line cap=round]  (0.16,1.43) arc [start angle=-30, end angle=-150, radius=0.185] (0.0,1.335) -- (0,1.175);
    %
    % Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \sheep@part@draw[\sheep@body!45!white!95!orange] (0.3216,0.13) arc (-15:195:0.10) -- (0.16,0.13) to [bend left] (0.25,0.13) -- cycle;
    \sheep@part@draw[\sheep@body!45!white!95!orange] (-0.3216,0.13) arc (195:-15:0.10) -- (-0.16,0.13) to[bend right] (-0.25,0.13) --cycle;
    %
    % Hair %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \sheep@part@draw[\sheep@body!50!darkgray,decorate,decoration={bumps,amplitude=\scalingfactor*2.5pt,segment length=\scalingfactor*10pt}] (-0.275,1.98) -- (-0.2,2.2)  -- (-0.008,2.2) -- (0.2,2.2) -- (0.275,1.98) -- cycle;
    %
    % Blush %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \ifsheep@blush
      \fill[\sheep@blushcolor,path fading=sheep@blush] (-0.25, 1.5) circle[radius=0.1]; 
      \fill[\sheep@blushcolor,path fading=sheep@blush] (0.25, 1.5) circle[radius=0.1];
    \fi% blush
    %
    % monocle %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \ifsheep@monocle
      \draw[black,line width=\scalingfactor*0.4pt] (0.2, 1.66) circle[radius=0.09];
      \draw[black,line width=\scalingfactor*0.4pt,rounded corners=\scalingfactor*0.01pt] (0.26,1.6) .. controls (0.3,1.54) .. (0.3,1.5) .. controls (0.28,1.45) .. (0.35,1.4);
    \fi% monocle
    %
  \fi% end showing details only for front
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname sheephookbody\endcsname
  \csname tikzlinghookbody\endcsname
  %  
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Sheep]{Mókollur, the sheep}
%
%\emph{The sheep was kindly contributed by @Plergux. Mókollur is a bit silly and likes to goof off. This sheep's favourite food are boiled potatoes.}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[lower separated=false, lefthand width=.8\linewidth]
%\vspace*{0.5cm}
%\lstinline|\usepackage{tikzlings-sheep}| 
%\vspace*{0.5cm}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{}
%\sheep
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic sheep can be modified by changing its colour:
%\begin{tcblisting}{}
%\sheep[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of various body parts can be adjusted:
%\begin{tcblisting}{}
%\sheep[eye=red]
%\end{tcblisting}
%\begin{tcblisting}{}
%\sheep[nose=red]
%\end{tcblisting}
%
%The sheep can also blush
%\begin{tcblisting}{}
%\sheep[blush=red]
%\end{tcblisting}
%
%and put on a monocle
%\begin{tcblisting}{}
%\sheep[monocle]
%\end{tcblisting}
%
%To view the sheep from behind:
%\begin{tcblisting}{}
%\sheep[back]
%\end{tcblisting}
%
%The key \lstinline|3D| will make the sheep 3-dimensional:
%\begin{tcblisting}{}
%\sheep[3D]
%\end{tcblisting}
%
%And finally the \lstinline|contour| key will only draw the outlines:
%\begin{tcblisting}{}
%\sheep[contour=black]
%\end{tcblisting}