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tikzlings-bears.sty
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tikzlings-bears.sty
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% !TeX root = ./examples/bear.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-bears}[2022/04/21 version v0.9 Draw teddy bears in TikZ]
\RequirePackage{tikz}
\RequirePackage{tikzlings-addons}
\newcommand*{\bear}[1][]{%
\begin{scope}%
\tikzset{/bear/.cd,#1}%
\bear@draw%
\end{scope}%
\thing[#1]%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname bearhookforeground\endcsname
\csname tikzlinghookforeground\endcsname
}
\newif\ifbear@threeD
\newif\ifbear@back
\newif\ifbear@contour
\tikzset{
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Pass unknown keys on to tikz
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
/bear/.search also={/tikz,/pgf,/thing},
/bear/.cd,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% body
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
body/.code = \def\bear@body{#1},
body = brown,
eye/.code = \def\bear@eye{#1},
eye = \bear@body!30!black,
mouth/.code = \def\bear@mouth{#1},
mouth = \bear@body!30!black,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% options
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3D/.code = \bear@threeDtrue,
back/.code = \bear@backtrue,
contour/.code = \bear@contourtrue
\def\bear@contour{#1}
\def\bear@mouth{#1},
contour/.default = black,
outline/.forward to = /bear/contour,
}
\def\bear@draw{%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% minimal bounding box size
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\path (-0.8, 0.0) rectangle (0.8, 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
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifbear@threeD
\def\bear@part@draw[##1]{\shade[ball color=##1]}
\else% 3D
\ifbear@contour
\def\bear@part@draw[##1]{\draw[##1,\bear@contour,fill=white,line width=\scalingfactor*0.4pt]}
\else% contour
\def\bear@part@draw[##1]{\fill[##1]}
\fi% contour
\fi% 3D
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Body parts
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname bearhookbackground\endcsname
\csname tikzlinghookbackground\endcsname
%
% Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bear@part@draw[\bear@body!70!black] (0.525,0.9) ellipse[x radius=0.35, y radius=0.15, rotate=-50];
\bear@part@draw[\bear@body!70!black] (-0.525,0.9) ellipse[x radius=0.35, y radius=0.15, rotate=50];
%
% Feet if back %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifbear@back
\bear@part@draw[\bear@body!70!black] (0.425, 0.3) circle[radius=0.28];
\bear@part@draw[\bear@body!70!black] (-0.425, 0.3) circle[radius=0.28];
\fi% back
%
% Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bear@part@draw[\bear@body!70!black] (0,0.75) ellipse[x radius=0.55, y radius=0.65];
\unless\ifbear@back
\bear@part@draw[\bear@body!50!white] (0,0.7) ellipse[x radius=0.35, y radius=0.4];
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname bearhookbelly\endcsname
\csname tikzlinghookbelly\endcsname
%
% Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifbear@back
\bear@part@draw[\bear@body!70!black] (0.425, 0.3) circle[radius=0.28];
\bear@part@draw[\bear@body!70!black] (-0.425, 0.3) circle[radius=0.28];
\bear@part@draw[\bear@body!50!white] (0.425, 0.3) circle[radius=0.17];
\bear@part@draw[\bear@body!50!white] (-0.425, 0.3) circle[radius=0.17];
\fi% back
%
% Ears %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bear@part@draw[\bear@body!70!black] (0.375, 1.95) circle[radius=0.15];
\bear@part@draw[\bear@body!70!black] (-0.375, 1.95) circle[radius=0.15];
\unless\ifbear@back
\bear@part@draw[\bear@body!50!white] (0.375, 1.95) circle[radius=0.1];
\bear@part@draw[\bear@body!50!white] (-0.375, 1.95) circle[radius=0.1];
\fi% back
%
% Head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bear@part@draw[\bear@body!70!black] (0, 1.55) circle[radius=0.5];
%
% Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifbear@back
%
% Muzzle %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bear@part@draw[\bear@body!50!white] (0, 1.4) ellipse[x radius=0.28, y radius=0.2];
\bear@part@draw[\bear@body!70!white!80!red] (0, 1.5) ellipse[x radius=0.15, y radius=0.08];
%
% Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\bear@part@draw[\bear@eye] (-0.155, 1.7) circle[radius=0.05];
\bear@part@draw[\bear@eye] (0.155, 1.7) circle[radius=0.05];
%
% Mouth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\draw[\bear@mouth,line width=\scalingfactor*0.4pt] (0.145, 1.38) arc [start angle=-20, end angle=-160, radius=0.16];
%
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname bearhookbody\endcsname
\csname tikzlinghookbody\endcsname
%
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Bear]{B\"ar, the teddy bear}
%
%\emph{If you look very closely at the group picture in \href{https://www.tug.org/TUGboat/tb39-2/tb122wright-tug18.pdf}{TUG goes to Rio} you can spot the real B\"ar in it}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[lower separated=false, lefthand width=.8\linewidth]
%\vspace*{0.5cm}
%\lstinline|\usepackage{tikzlings-bears}|
%\vspace*{0.5cm}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{}
%\bear
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic teddy bear can be modified by changing its colour:
%\begin{tcblisting}{}
%\bear[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of various body parts can be adjusted:
%\begin{tcblisting}{}
%\bear[eye=red]
%\end{tcblisting}
%\begin{tcblisting}{}
%\bear[mouth=red]
%\end{tcblisting}
%
%To view the teddy bear from behind:
%\begin{tcblisting}{}
%\bear[back]
%\end{tcblisting}
%
%The key \lstinline|3D| will make the teddy bear 3-dimensional:
%\begin{tcblisting}{}
%\bear[3D]
%\end{tcblisting}
%
%And finally the \lstinline|contour| key will only draw the outlines:
%\begin{tcblisting}{}
%\bear[contour=black]
%\end{tcblisting}
%
%\subsection{Extension}
%
%The B\"ar and Ulrike Fischer wrote the fantastic \lstinline|bearwear| package, that provides many different clothing options for the \lstinline|TikZbears|. All the other \tikzlings admire them for the nice clothing!
%
%A short example:
%
%\begin{tcblisting}{}
%%\usepackage{bearwear}
%\bear
%\bearwear[
% long sleeves,
% shirt=red!80!black
%]
%\end{tcblisting}
%
%Many more options and examples can be found in the package documentation \url{https://ctan.org/pkg/bearwear}.