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tikzlings-elephants.sty
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tikzlings-elephants.sty
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% !TeX root = ./examples/elephant.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-elephants}[2022/06/17 version v1.0 Draw teddy elephants in TikZ]
\RequirePackage{tikz}
\RequirePackage{tikzlings-addons}
\newcommand*{\elephant}[1][]{%
\begin{scope}%
\tikzset{/elephant/.cd,#1}%
\elephant@draw%
\end{scope}%
\thing[#1]%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname elephanthookforeground\endcsname
\csname tikzlinghookforeground\endcsname
}
\newif\ifelephant@threeD
\newif\ifelephant@back
\newif\ifelephant@contour
\tikzset{
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Pass unknown keys on to tikz
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
/elephant/.search also={/tikz,/pgf,/thing},
/elephant/.cd,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% body
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
body/.store in = \elephant@body,
body = gray,
eye/.store in = \elephant@eye,
eye = \elephant@body!30!black,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% options
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3D/.code = \elephant@threeDtrue,
back/.code = \elephant@backtrue,
contour/.code = \elephant@contourtrue
\def\elephant@contour{#1},
contour/.default = black,
outline/.forward to = /elephant/contour,
}
\def\elephant@draw{%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% minimal bounding box size
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\path (-0.86, 0.0) rectangle (0.86, 2.17);
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifelephant@threeD
\def\elephant@part@draw[##1]{\shade[ball color=##1]}
\else% 3D
\ifelephant@contour
\def\elephant@part@draw[##1]{\draw[##1,\elephant@contour,fill=white,line width=\scalingfactor*0.4pt]}
\else% contour
\def\elephant@part@draw[##1]{\fill[##1]}
\fi% contour
\fi% 3D
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Body parts
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname elephanthookbackground\endcsname
\csname tikzlinghookbackground\endcsname
%
% Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\elephant@part@draw[\elephant@body] (0.47,0.86) ellipse[x radius=0.35, y radius=0.25, rotate=-50];
\elephant@part@draw[\elephant@body] (-0.47,0.86) ellipse[x radius=0.35, y radius=0.25, rotate=50];
%
% Feet if back %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifelephant@back
\elephant@part@draw[\elephant@body] (0.425, 0.3) circle[radius=0.28];
\elephant@part@draw[\elephant@body] (-0.425, 0.3) circle[radius=0.28];
\elephant@part@draw[\elephant@body] (0.57,0.74) circle [radius=0.20];
\elephant@part@draw[\elephant@body] (-0.57,0.74) circle [radius=0.20];
\fi% back
%
% Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\elephant@part@draw[\elephant@body] (0,0.75) ellipse[x radius=0.55, y radius=0.65];
\unless\ifelephant@back
\elephant@part@draw[\elephant@body!30!white] (0,0.7) ellipse[x radius=0.35, y radius=0.4];
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname elephanthookbelly\endcsname
\csname tikzlinghookbelly\endcsname
%
% Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifelephant@back
\elephant@part@draw[\elephant@body] (0.425, 0.3) circle[radius=0.28];
\elephant@part@draw[\elephant@body] (-0.425, 0.3) circle[radius=0.28];
\elephant@part@draw[\elephant@body!30!white] (0.425, 0.3) circle[radius=0.17];
\elephant@part@draw[\elephant@body!30!white] (-0.425, 0.3) circle[radius=0.17];
\elephant@part@draw[\elephant@body] (0.57,0.75) circle [radius=0.20];
\elephant@part@draw[\elephant@body!30!white] (0.57,0.74) circle [radius=0.12];
\elephant@part@draw[\elephant@body] (-0.57,0.74) circle [radius=0.20];
\elephant@part@draw[\elephant@body!30!white] (-0.57,0.74) circle [radius=0.12];
\fi% back
%
% Ears %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\elephant@part@draw[\elephant@body] (0.5, 1.7) ellipse [x radius=0.35,y radius=0.45];
\elephant@part@draw[\elephant@body] (-0.5, 1.7) ellipse [x radius=0.35,y radius=0.45];
\unless\ifelephant@back
\elephant@part@draw[\elephant@body!30!white] (0.5, 1.7) ellipse [x radius=0.25,y radius=0.35];
\elephant@part@draw[\elephant@body!30!white] (-0.5, 1.7) ellipse [x radius=0.25,y radius=0.35];
\fi% back
%
% Head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\elephant@part@draw[\elephant@body] (0, 1.55) circle[radius=0.5];
%
% Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifelephant@back
%
% Trunk% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifelephant@threeD
\elephant@part@draw[\elephant@body,draw=\elephant@body!70!black,line width=\scalingfactor*0.6pt] (0.1428, 1.4375) .. controls (0.1607, 1.0411) and (0.3327, 1.1276) .. (0.6705, 1.355) -- (0.72, 1.22) .. controls (0.3327, 0.9) and (-0.1607, 0.8) .. (-0.1428, 1.4375) arc [start angle=160, end angle=20, radius=0.155] -- cycle;
\fill[\elephant@body!40!black] (0.7, 1.29) circle [radius=0.08];
\else% 3D
\elephant@part@draw[\elephant@body,draw=\elephant@body!70!black,line width=\scalingfactor*0.6pt] (0.1428, 1.4375) .. controls (0.1607, 1.0411) and (0.3327, 1.1276) .. (0.6705, 1.355) -- (0.72, 1.22) .. controls (0.3327, 0.9) and (-0.1607, 0.8) .. (-0.1428, 1.4375);
\elephant@part@draw[\elephant@body!70!black] (0.7, 1.29) circle [radius=0.08];
\fi% 3D
%
% Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\elephant@part@draw[\elephant@eye] (-0.155, 1.7) circle[radius=0.05];
\elephant@part@draw[\elephant@eye] (0.155, 1.7) circle[radius=0.05];
%
\fi% back
%
% Tail if back %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifelephant@back
\draw[\elephant@body!30!white,line width=\scalingfactor*0.6pt] (0, 0.5904) .. controls (-0.1619, 0.4147) and (0.203, 0.4157) .. (0.2422, 0.2712);
\elephant@part@draw[\elephant@body!30!white] (0.2008, 0.1949) .. controls (0.2452, 0.2121) and (0.2799, 0.242) .. (0.2691, 0.2755) .. controls (0.2611, 0.3005) and (0.2127, 0.3115) .. (0.1927, 0.2945) .. controls (0.1674, 0.2729) and (0.2082, 0.2383) .. (0.2008, 0.1949) -- cycle;
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname elephanthookbody\endcsname
\csname tikzlinghookbody\endcsname
%
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Elephant]{Johannes, the elephant}
%
%\emph{The namesake of Johannes loves elephants}
%
%\subsection{Package name}
%
%\begin{tcolorbox}
%\begin{samcode}
%\usepackage{tikzlings-elephants}
%\end{samcode}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{}
%\elephant
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic elephant can be modified by changing its colour:
%\begin{tcblisting}{}
%\elephant[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of the eyes can be adjusted:
%\begin{tcblisting}{}
%\elephant[eye=red]
%\end{tcblisting}
%
%To view the elephant from behind:
%\begin{tcblisting}{}
%\elephant[back]
%\end{tcblisting}
%
%The key \saminline|3D| will make the elephant 3-dimensional:
%\begin{tcblisting}{}
%\elephant[3D]
%\end{tcblisting}
%
%And finally the \saminline|contour| key will only draw the outlines:
%\begin{tcblisting}{}
%\elephant[contour=black]
%\end{tcblisting}