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tikzlings-koalas.sty
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% !TeX root = ./examples/koala.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-koalas}[2025/01/05 version v2.2 Drawing koalas in TikZ]
\RequirePackage{tikz}
\RequirePackage{tikzlings-addons}
\usetikzlibrary{shadows.blur}
\usetikzlibrary{fadings}
\tikzfading[name=koala@blush,inner color=transparent!50,outer color=transparent!100]
\newcommand*{\koala}[1][]{%
\begin{scope}%
\tikzset{/koala/.cd,#1}%
\koala@draw%
\end{scope}%
\thing[#1]%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\UseHook{tikzlings/koala/foreground}
\UseHook{tikzlings/koala/foreground}
\csname koalahookforeground\endcsname
\csname tikzlinghookforeground\endcsname
%
}
\newif\ifkoala@blush
\newif\ifkoala@sleeping
\newif\ifkoala@threeD
\newif\ifkoala@back
\newif\ifkoala@contour
\newif\ifkoala@openmouth
\NewHook{tikzlings/koala/background}
\NewHook{tikzlings/koala/belly}
\NewHook{tikzlings/koala/body}
\NewHook{tikzlings/koala/foreground}
\tikzset{
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Pass unknown keys on to tikz
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
/koala/.search also={/tikz,/pgf,/thing},
/koala/.cd,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% body
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
body/.store in = \koala@body,
body = gray!75!white,
eyes/.store in = \koala@eyes,
eyes = black,
eye/.forward to = /koala/eyes,
mouth/.store in = \koala@mouth,
mouth = \koala@body!40!black,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% options
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
blush/.code = \koala@blushtrue
\def\koala@blushcolor{#1},
blush/.default = red,
sleeping/.code = \koala@sleepingtrue,
openmouth/.code = \koala@openmouthtrue,
open mouth/.forward to = /koala/openmouth,
3D/.code = \koala@threeDtrue
\def\koala@mouth{black},
back/.code = \koala@backtrue,
contour/.code = \koala@contourtrue
\def\koala@contour{#1}
\def\koala@blushcolor{#1}
\def\koala@mouth{#1},
contour/.default = black,
outline/.forward to = /koala/contour,
}
\def\koala@draw{%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% minimal bounding box size
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\path (-0.88,0.1) rectangle (0.88, 2.35);
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifkoala@threeD
\def\koala@part@draw[##1]{\shade[ball color=##1]}
\else% 3D
\ifkoala@contour
\def\koala@part@draw[##1]{\draw[##1,\koala@contour,fill=white,line width=\scalingfactor*0.4pt]}
\else% contour
\def\koala@part@draw[##1]{\fill[##1]}
\fi% contour
\fi% 3D
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Body parts
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\UseHook{tikzlings/koala/background}
\UseHook{tikzlings/koala/background}
\csname koalahookbackground\endcsname
\csname tikzlinghookbackground\endcsname
%
% Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\koala@part@draw[\koala@body!50!black] (0.255,0.2) ellipse[x radius=0.23, y radius=0.09];
\koala@part@draw[\koala@body!50!black] (-0.255,0.2) ellipse[x radius=0.23, y radius=0.09];
%
% Ears %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\koala@part@draw[\koala@body] (0.405, 2.1) ellipse[x radius=0.3, y radius=0.23];
\koala@part@draw[\koala@body] (-0.405, 2.1) ellipse[x radius=0.3, y radius=0.23];
\unless\ifkoala@back
\koala@part@draw[\koala@body!40!white] (-0.405, 2.1) ellipse[x radius=0.15, y radius=0.12];
\koala@part@draw[\koala@body!40!white] (0.405, 2.1) ellipse[x radius=0.15, y radius=0.12];
\fi% back
%
% Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\koala@part@draw[\koala@body] (-0.625,1) ellipse[x radius=0.42, y radius=0.13, rotate=70];
\koala@part@draw[\koala@body!50!black] (-0.745,0.65) ellipse[x radius=0.12, y radius=0.08, rotate=-20];
\koala@part@draw[\koala@body] (0.625,1) ellipse[x radius=0.42, y radius=0.13, rotate=-70];
\koala@part@draw[\koala@body!50!black] (0.745,0.65) ellipse[x radius=0.12, y radius=0.08, rotate=20];
%
% Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\koala@part@draw[\koala@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;
%
% Belly %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifkoala@back
\koala@part@draw[\koala@body!40!white] ( 0.425, 0.71) .. controls ( 0.425, 0.41) and ( 0.255, 0.27) .. ( 0 , 0.27) .. controls (-0.255, 0.27) and (-0.425, 0.41) .. (-0.425, 0.71) .. controls (-0.425, 1.01) and (-0.255, 1.20) .. ( 0 , 1.20) .. controls ( 0.225, 1.20) and ( 0.425, 1.01) .. ( 0.425, 0.71) -- cycle;
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\UseHook{tikzlings/koala/belly}
\UseHook{tikzlings/koala/belly}
\csname koalahookbelly\endcsname
\csname tikzlinghookbelly\endcsname
%
% Head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\koala@part@draw[\koala@body] (0,1.67) ellipse[x radius=0.55, y radius=0.45];
%
% Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifkoala@back
%
% Nose %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\koala@part@draw[\koala@body!40!black] (-0.1501, 1.5609) .. controls (-0.1784, 1.4833) and (-0.0827, 1.4108) .. ( 0.0000, 1.4108) .. controls ( 0.0827, 1.4108) and ( 0.1784, 1.4833) .. ( 0.1501, 1.5609) .. controls ( 0.1290, 1.6191) and ( 0.1187, 1.6573) .. ( 0.0750, 1.7010) .. controls ( 0.0336, 1.7424) and (-0.0336, 1.7424) .. (-0.0750, 1.7010) .. controls (-0.1187, 1.6573) and (-0.1290, 1.6191) .. (-0.1501, 1.5609) -- cycle;
%
% Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifkoala@sleeping
\fill[\koala@body!50!black] (0.2534, 1.675) rectangle ++(0.005, 0.03);
\fill[\koala@body!50!black,rotate around={20:(0.2925, 1.6925)}] (0.29, 1.68) rectangle ++(0.005, 0.03);
\fill[\koala@body!50!black,rotate around={-20:(0.2143, 1.6925)}] (0.2168, 1.68) rectangle ++(0.005, 0.03);
\fill[\koala@body!50!black,rotate around={40:(0.3255, 1.7025)}] (0.323, 1.69) rectangle ++(0.005, 0.03);
\fill[\koala@body!50!black,rotate around={-40:(0.1813, 1.7025)}] (0.1838, 1.69) rectangle ++(0.005, 0.03);
\fill[\koala@body!50!black] (-0.2534, 1.675) rectangle ++(-0.005, 0.03);
\fill[\koala@body!50!black,rotate around={-20:(-0.2925, 1.6925)}] (-0.29, 1.68) rectangle ++(-0.005, 0.03);
\fill[\koala@body!50!black,rotate around={20:(-0.2143, 1.6925)}] (-0.2168, 1.68) rectangle ++(-0.005, 0.03);
\fill[\koala@body!50!black,rotate around={-40:(-0.3255, 1.7025)}] (-0.323, 1.69) rectangle ++(-0.005, 0.03);
\fill[\koala@body!50!black,rotate around={40:(-0.1813, 1.7025)}] (-0.1838, 1.69) rectangle ++(-0.005, 0.03);
\fill[\koala@body!50!black, even odd rule] (0.3331, 1.741) .. controls (0.3331, 1.685) and (0.1737, 1.685) .. (0.1737, 1.741) .. controls (0.1737, 1.848) and (0.3331, 1.848) .. (0.3331, 1.741) -- cycle (0.328, 1.741) .. controls (0.323, 1.705) and (0.184, 1.705) .. (0.179, 1.741) .. controls (0.184, 1.843) and (0.323, 1.843) .. (0.328, 1.741) -- cycle;
\fill[\koala@body!50!black, even odd rule] (-0.3331, 1.741) .. controls (-0.3331, 1.685) and (-0.1737, 1.685) .. (-0.1737, 1.741) .. controls (-0.1737, 1.848) and (-0.3331, 1.848) .. (-0.3331, 1.741) -- cycle (-0.328, 1.741) .. controls (-0.323, 1.705) and (-0.184, 1.705) .. (-0.179, 1.741) .. controls (-0.184, 1.843) and (-0.323, 1.843) .. (-0.328, 1.741) -- cycle;
\else% sleeping
\koala@part@draw[\koala@eyes] (-0.255, 1.74) circle[radius=0.08];
\koala@part@draw[\koala@eyes] (0.255, 1.74) circle[radius=0.08];
\fill[white] (-0.27, 1.76) circle[radius=0.015];
\fill[white] (0.24, 1.76) circle[radius=0.015];
\fi% sleeping
%
% Mouth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifkoala@openmouth
\filldraw[\koala@mouth,line width=\scalingfactor*0.4pt] (0.115, 1.39) arc [start angle=-40, end angle=-140, radius=0.16];
\else
\draw[\koala@mouth,line width=\scalingfactor*0.4pt] (0.115, 1.39) arc [start angle=-40, end angle=-140, radius=0.16];
\fi
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% optional
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Blushed %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifkoala@blush
\fill[\koala@blushcolor,path fading=koala@blush] (-0.3, 1.52) circle[radius=0.1];
\fill[\koala@blushcolor,path fading=koala@blush] (0.3, 1.52) circle[radius=0.1];
\fi% blush
%
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\UseHook{tikzlings/koala/body}
\UseHook{tikzlings/koala/body}
\csname koalahookbody\endcsname
\csname tikzlinghookbody\endcsname
%
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Koala]{Will, the koala}
%
%\emph{The koala was generously contributed by @marmot and is named in honour of a \LaTeX{} developer from Down Under}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[title={Package usage}]
%\begin{samcode}
%\usepackage{tikzlings-koalas}
%\end{samcode}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{title={Basic koala}}
%\koala
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic koala can be modified by changing its colour:
%\begin{tcblisting}{title={Body colour}}
%\koala[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}}
%\koala[eyes=red]
%\end{tcblisting}
%\begin{tcblisting}{title={Mouth colour}}
%\koala[mouth=red]
%\end{tcblisting}
%
% The koala can open its mouth:
%\begin{tcblisting}{title={Open mouth}}
%\koala[openmouth]
%\end{tcblisting}
%
%It can also blush
%\begin{tcblisting}{title={Blushing koala}}
%\koala[blush=red]
%\end{tcblisting}
%
%and if tired, it is going to take a nap:
%\begin{tcblisting}{title={Sleep}}
%\koala[sleeping]
%\end{tcblisting}
%
%To view the koala from behind:
%\begin{tcblisting}{title={Back view}}
%\koala[back]
%\end{tcblisting}
%
%The key \saminline|3D| will make the koala 3-dimensional:
%\begin{tcblisting}{title={3D view}}
%\koala[3D]
%\end{tcblisting}
%
%And finally the \saminline|contour| key will only draw the outlines:
%\begin{tcblisting}{title={Contours}}
%\koala[contour=black]
%\end{tcblisting}