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% !TeX root = ./examples/snowman.tex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% The tikzlings-snowmans package (part of the tikzlings collection)
% A package to bring snowmans 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
%
% Version 0.1
% Nov 9, 2018    
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ProvidesPackage{tikzlings-snowmans}
 [2018/11/09 v0.1 Draw snowmans in TikZ]

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

\newcommand*{\snowman}[1][]{%
  \begin{scope}%
    \tikzset{/snowman/.cd,#1}%
    \snowman@draw%
  \end{scope}%
  \thing[#1]%
}

\newif\ifsnowman@threeD

\tikzset{
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Pass unknown keys on to tikz
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  /snowman/.search also={/tikz,/pgf,/thing},
  /snowman/.cd,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % body
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  body/.code         = \def\snowman@body{#1},
  body               = white!95!black,
  eye/.code          = \def\snowman@eye{#1},
  eye                = black,
  nose/.code         = \def\snowman@nose{#1},
  nose               = orange,
  mouth/.code        = \def\snowman@mouth{#1},
  mouth              = black,
  buttons/.code      = \def\snowman@buttons{#1},
  buttons            = black, 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % options
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  3D/.code           = \snowman@threeDtrue, 
}

\def\snowman@draw{%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% minimal bounding box size 
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\path (-0.75, 0.0) rectangle (0.75, 2.13);
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% 
% switch between 2D and 3D, from
% https://chat.stackexchange.com/transcript/message/45991801#45991801
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifsnowman@threeD
  \def\snowman@part@draw[##1]{\shade[ball color=##1]}
\else
  \def\snowman@part@draw[##1]{\fill[##1]}
\fi
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Body parts (center: x=0.925)
% 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\snowman@part@draw[\snowman@body,rotate around={-50:(0.5,1.1)}] (0.5,1.1) ellipse (0.3 and 0.12);
\snowman@part@draw[\snowman@body,rotate around={50:(-0.5,1.1)}] (-0.5,1.1) ellipse (0.3 and 0.12);
%
% Body + Head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\snowman@part@draw[\snowman@body] (0,0.5) ellipse (0.6 and 0.5);
\snowman@part@draw[\snowman@body] (0,1.1) ellipse (0.5 and 0.4);
\snowman@part@draw[\snowman@body] (0,1.7) circle (0.4);  
%
% Mouth% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\fill[\snowman@mouth] (0,1.5) circle (0.016);
\fill[\snowman@mouth] (0.04,1.507) circle (0.016);
\fill[\snowman@mouth] (-0.04,1.507) circle (0.016);
\fill[\snowman@mouth] (0.08,1.522) circle (0.016);
\fill[\snowman@mouth] (-0.08,1.522) circle (0.016);
\fill[\snowman@mouth] (0.12,1.543) circle (0.016);
\fill[\snowman@mouth] (-0.12,1.543) circle (0.016);
%
% Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\snowman@part@draw[\snowman@eye] (-0.155,1.8) circle (0.04); 
\snowman@part@draw[\snowman@eye] (0.155,1.8) circle (0.04); 
%
% Nose %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\snowman@part@draw[\snowman@nose] (0,1.67) circle (0.05) (0,1.72) -- (0,1.62) -- (0.15,1.64) -- cycle;
%
% buttons %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\snowman@part@draw[\snowman@buttons] (0,1.15) circle (0.04); 
\snowman@part@draw[\snowman@buttons] (0,0.95) circle (0.04); 
\snowman@part@draw[\snowman@buttons] (0,0.75) circle (0.04); 
%
}