% !TeX root = ./examples/snowman.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-snowmen}[2025/03/23 version v2.3 Draw snowmen in TikZ]

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

\newcommand*{\snowman}[1][]{%
 \begin{scope}%
   \tikzset{/snowman/.cd,#1}%
   \ifsnowman@globalwarming
     \snowman@drawpuddle%
   \else
     \snowman@draw%
   \fi
 \end{scope}%
 \thing[#1]%
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/snowman/foreground}
 \UseHook{tikzlings/foreground}
 \csname snowmanhookforeground\endcsname
 \csname tikzlinghookforeground\endcsname
 %
}

\newif\ifsnowman@threeD
\newif\ifsnowman@back
\newif\ifsnowman@globalwarming
\newif\ifsnowman@contour
\newif\ifsnowman@openmouth

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

\tikzset{
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Pass unknown keys on to tikz
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 /snowman/.search also={/tikz,/pgf,/thing},
 /snowman/.cd,
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % body
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 body/.store in     = \snowman@body,
 body               = white!95!black,
 eyes/.store in     = \snowman@eyes,
 eyes               = black,
 eye/.forward to    = /snowman/eyes,
 nose/.store in     = \snowman@nose,
 nose               = orange,
 mouth/.store in    = \snowman@mouth,
 mouth              = black,
 buttons/.store in  = \snowman@buttons,
 buttons            = black,
 button/.forward to = /snowman/buttons,
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % options
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 openmouth/.code    = \snowman@openmouthtrue,
 open mouth/.forward to = /snowman/openmouth,
 3D/.code           = \snowman@threeDtrue,
 back/.code         = \snowman@backtrue,
 globalwarming/.code= \snowman@globalwarmingtrue
                      \def\snowman@globalwarming{#1},
 globalwarming/.default = blue!10!white,
 global warming/.forward to = /snowman/globalwarming,
 contour/.code      = \snowman@contourtrue
                      \def\snowman@contour{#1}
                      \def\snowman@mouth{#1},
 contour/.default   = black,
 outline/.forward to = /snowman/contour,
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% normal snowman
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\def\snowman@draw{%
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % minimal bounding box size
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \path (-0.75, 0.0) rectangle (0.75, 2.13);
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % 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
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \ifsnowman@threeD
   \def\snowman@part@draw[##1]{\shade[ball color=##1]}
 \else% 3D
   \ifsnowman@contour
     \def\snowman@part@draw[##1]{\draw[##1,\snowman@contour,fill=white,line width=\scalingfactor*0.4pt]}
   \else% contour
     \def\snowman@part@draw[##1]{\fill[##1]}
   \fi% contour
 \fi% 3D
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Body parts
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/snowman/background}
 \UseHook{tikzlings/background}
 \csname snowmanhookbackground\endcsname
 \csname tikzlinghookbackground\endcsname
 %
 % Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \snowman@part@draw[\snowman@body] (0.5,1.1) ellipse[x radius=0.3, y radius=0.12, rotate=-50];
 \snowman@part@draw[\snowman@body] (-0.5,1.1) ellipse[x radius=0.3, y radius=0.12, rotate=50];
 %
 % Body + Head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \snowman@part@draw[\snowman@body] (0,0.5) ellipse[x radius=0.6, y radius=0.5];
 \snowman@part@draw[\snowman@body] (0,1.1) ellipse[x radius=0.5, y radius=0.4];
 \snowman@part@draw[\snowman@body] (0,1.7) circle[radius=0.4];
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/snowman/belly}
 \UseHook{tikzlings/belly}
 \csname snowmanhookbelly\endcsname
 \csname tikzlinghookbelly\endcsname
 %
 % Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \unless\ifsnowman@back
   %
   % Mouth% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \fill[\snowman@mouth] (0,1.5) circle[radius=0.016];
   \fill[\snowman@mouth] (0.04,1.507) circle[radius=0.016];
   \fill[\snowman@mouth] (-0.04,1.507) circle[radius=0.016];
   \fill[\snowman@mouth] (0.08,1.522) circle[radius=0.016];
   \fill[\snowman@mouth] (-0.08,1.522) circle[radius=0.016];
   \fill[\snowman@mouth] (0.12,1.543) circle[radius=0.016];
   \fill[\snowman@mouth] (-0.12,1.543) circle[radius=0.016];
   \ifsnowman@openmouth
     \fill[\snowman@mouth] (0,1.57) circle[radius=0.016];
     \fill[\snowman@mouth] (-0.04,1.565) circle[radius=0.016];
     \fill[\snowman@mouth] (-0.08,1.56) circle[radius=0.016];
     \fill[\snowman@mouth] (0.04,1.565) circle[radius=0.016];
     \fill[\snowman@mouth] (0.08,1.56) circle[radius=0.016];
   \fi
   %
   % Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \snowman@part@draw[\snowman@eyes] (-0.155,1.8) circle[radius=0.04];
   \snowman@part@draw[\snowman@eyes] (0.155,1.8) circle[radius=0.04];
   %
   % Nose %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \snowman@part@draw[\snowman@nose] (0,1.72) arc [radius=0.05, start angle=90, end angle=270] (0,1.62) -- (0.15,1.64) -- (0,1.72);
   %
   % Buttons %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   \snowman@part@draw[\snowman@buttons] (0,1.15) circle[radius=0.04];
   \snowman@part@draw[\snowman@buttons] (0,0.95) circle[radius=0.04];
   \snowman@part@draw[\snowman@buttons] (0,0.75) circle[radius=0.04];
   %
 \fi% back
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/snowman/body}
 \UseHook{tikzlings/body}
 \csname snowmanhookbody\endcsname
 \csname tikzlinghookbody\endcsname
 %
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% molten snowman
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\def\snowman@drawpuddle{
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % minimal bounding box size
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \path (-0.75, 0.0) rectangle (0.75, 2.13);
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % 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
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \ifsnowman@threeD
   \def\snowman@part@draw[##1]{\shade[ball color=##1]}
 \else% 3D
   \ifsnowman@contour
     \def\snowman@part@draw[##1]{\draw[##1,\snowman@contour,fill=white,line width=\scalingfactor*0.4pt]}
   \else% contour
     \def\snowman@part@draw[##1]{\fill[##1]}
   \fi% contour
 \fi% 3D
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % Body parts
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/snowman/background}
 \UseHook{tikzlings/background}
 \csname snowmanhookbackground\endcsname
 \csname tikzlinghookbackground\endcsname
 %
 % Puddle %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \ifsnowman@contour
   \draw[\snowman@contour,fill=white,line width=\scalingfactor*0.4pt] (0,1.15) ellipse[x radius=1.6,y radius=1.15];
 \else% contour
   \fill[\snowman@globalwarming] (0,1.15) ellipse[x radius=1.6,y radius=1.15];
 \fi% contour
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/snowman/belly}
 \UseHook{tikzlings/belly}
 \csname snowmanhookbelly\endcsname
 \csname tikzlinghookbelly\endcsname
 %
 % Mouth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \fill[\snowman@mouth] (0,1.23) circle[radius=0.025];
 \fill[\snowman@mouth] (0.06,1.3) circle[radius=0.025];
 \fill[\snowman@mouth] (-0.06,1.27) circle[radius=0.025];
 \fill[\snowman@mouth] (0.09,1.37) circle[radius=0.025];
 \fill[\snowman@mouth] (-0.18,1.28) circle[radius=0.025];
 \fill[\snowman@mouth] (0.2,1.28) circle[radius=0.025];
 \fill[\snowman@mouth] (-0.25,1.2) circle[radius=0.025];
 %
 % Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \snowman@part@draw[\snowman@eyes] (-0.5,1.75) circle[radius=0.06];
 \snowman@part@draw[\snowman@eyes] (-0.1,1.55) circle[radius=0.06];
 %
 % Nose %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \snowman@part@draw[\snowman@nose] (-0.6,1.4) -- (-0.8,1.42) -- (-0.6,1.54) (-0.6,1.4) arc[radius=0.07, start angle=-90, end angle=90];
 %
 % Buttons %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \snowman@part@draw[\snowman@buttons] (0.1,0.8) circle[radius=0.06];
 \snowman@part@draw[\snowman@buttons] (-0.15,0.55) circle[radius=0.06];
 \snowman@part@draw[\snowman@buttons] (0,0.25) circle[radius=0.06];
 %
 % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \UseHook{tikzlings/snowman/body}
 \UseHook{tikzlings/body}
 \csname snowmanhookbody\endcsname
 \csname tikzlinghookbody\endcsname
 %
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Snowman]{Yuki, the snowman}
%
%\emph{Yuki is the transcription of the Japanese word for snow}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[title={Package usage}]
%\begin{samcode}
%\usepackage{tikzlings-snowmen}
%\end{samcode}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{title={Basic snowman}}
%\snowman
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic snowman can be modified by changing its colour:
%\begin{tcblisting}{title={Body colour}}
%\snowman[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}}
%\snowman[eyes=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Nose colour}}
%\snowman[nose=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Mouth colour}}
%\snowman[mouth=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Button colour}}
%\snowman[buttons=red]
%\end{tcblisting}
%
% The snowman can open its mouth:
%\begin{tcblisting}{title={Open mouth}}
%\snowman[openmouth]
%\end{tcblisting}
%
%The biggest enemy of the snowman are raising temperatures:
%\begin{tcblisting}{title={Global warming}}
%\snowman[globalwarming,tophat]
%\end{tcblisting}
%
%To view the snowman from behind:
%\begin{tcblisting}{title={Back view}}
%\snowman[back]
%\end{tcblisting}
%
%The key \saminline|3D| will make the snowman 3-dimensional:
%\begin{tcblisting}{title={3D view}}
%\snowman[3D]
%\end{tcblisting}
%
%And finally the \saminline|contour| key will only draw the outlines:
%\begin{tcblisting}{title={Contours}}
%\snowman[contour=black]
%\end{tcblisting}

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