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tikzlings-owls.sty
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tikzlings-owls.sty
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% !TeX root = ./examples/owl.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-owls}[2022/04/21 version v0.9 Draw owls in TikZ]
\RequirePackage{tikz}
\RequirePackage{tikzlings-addons}
\newcommand*{\owl}[1][]{%
\begin{scope}%
\tikzset{/owl/.cd,#1}%
\owl@draw%
\end{scope}%
\thing[#1]%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname owlhookforeground\endcsname
\csname tikzlinghookforeground\endcsname
%
}
\newif\ifowl@threeD
\newif\ifowl@back
\newif\ifowl@contour
\tikzset{
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Pass unknown keys on to tikz
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
/owl/.search also={/tikz,/pgf,/thing},
/owl/.cd,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% body
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
body/.code = \def\owl@body{#1},
body = brown!70!black,
eye/.code = \def\owl@eye{#1},
eye = white!90!gray,
pupil/.code = \def\owl@pupil{#1},
pupil = brown!30!black,
bill/.code = \def\owl@bill{#1},
bill = orange,
feet/.code = \def\owl@feet{#1},
feet = orange,
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% options
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3D/.code = \owl@threeDtrue,
back/.code = \owl@backtrue,
contour/.code = \owl@contourtrue
\def\owl@contour{#1},
contour/.default = black,
outline/.forward to = /owl/contour,
}
\def\owl@draw{%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% minimal bounding box size
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\path (-0.73, 0.08) rectangle (0.73, 2.24);
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifowl@threeD
\def\owl@part@draw[##1]{\shade[ball color=##1]}
\else% 3D
\ifowl@contour
\def\owl@part@draw[##1]{\draw[##1,\owl@contour,fill=white,line width=\scalingfactor*0.4pt]}
\else% contour
\def\owl@part@draw[##1]{\fill[##1]}
\fi% contour
\fi% 3D
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Body parts
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname owlhookbackground\endcsname
\csname tikzlinghookbackground\endcsname
%
% Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\owl@part@draw[\owl@body] (0.575,0.8) ellipse[x radius=0.38, y radius=0.1, rotate=-80];
\owl@part@draw[\owl@body] (-0.575,0.8) ellipse[x radius=0.38, y radius=0.1, rotate=80];
%
% Feet if back %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\ifowl@back
\owl@part@draw[\owl@feet] (0.175,0.2) ellipse[x radius=0.03, y radius=0.1];
\owl@part@draw[\owl@feet] (0.225,0.21) ellipse[x radius=0.03, y radius=0.1, rotate=20];
\owl@part@draw[\owl@feet] (0.275,0.23) ellipse[x radius=0.03, y radius=0.1, rotate=40];
\owl@part@draw[\owl@feet] (-0.175,0.2) ellipse[x radius=0.03, y radius=0.1];
\owl@part@draw[\owl@feet] (-0.225,0.21) ellipse[x radius=0.03, y radius=0.1, rotate=-20];
\owl@part@draw[\owl@feet] (-0.275,0.23) ellipse[x radius=0.03, y radius=0.1, rotate=-40];
\fi% back
%
% Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\owl@part@draw[\owl@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;
%
% Ears %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\owl@part@draw[\owl@body] (-0.6361, 1.777) .. controls (-0.6361, 1.777) and (-0.7586, 1.9603) .. (-0.6759, 2.2145) .. controls (-0.3248, 1.912) and (0.3248, 1.912) .. (0.6759, 2.2145) .. controls (0.7586, 1.9603) and (0.6361, 1.777) .. (0.6361, 1.777);
%
% Belly %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifowl@back
\owl@part@draw[\owl@body!50!white] (0.425,0.5) .. controls (0.425,0.31) and (0.245,0.27) .. (0,0.27) .. controls (-0.245,0.27) and (-0.425,0.31) .. (-0.425,0.5) .. controls (-0.425,0.81) and (-0.225,0.98) .. (0,0.98) .. controls (0.225,0.98) and (0.425,0.81) .. (0.425,0.5) -- cycle;
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname owlhookbelly\endcsname
\csname tikzlinghookbelly\endcsname
%
% head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\owl@part@draw[\owl@body] (0,1.55) ellipse[x radius=0.7, y radius=0.55];
%
% Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifowl@back
\ifowl@contour
\owl@part@draw[\owl@eye] (-0.28, 1.6) circle[radius=0.22];
\owl@part@draw[\owl@eye] (0.28, 1.6) circle[radius=0.22];
\else% contour
\fill[\owl@eye] (-0.28, 1.6) circle[radius=0.22];
\fill[\owl@eye] (0.28, 1.6) circle[radius=0.22];
\fi% contour
\owl@part@draw[\owl@pupil] (-0.28, 1.6) circle[radius=0.15];
\owl@part@draw[\owl@pupil] (0.28, 1.6) circle[radius=0.15];
\owl@part@draw[white] (0.25, 1.64) circle[radius=0.03];
\owl@part@draw[white] (-0.31, 1.64) circle[radius=0.03];
\fi% back
%
% Bill %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifowl@back
\owl@part@draw[\owl@bill] (0, 1.4) -- (-0.1, 1.3) -- (0, 1.15) -- (0.1, 1.3) -- cycle;
\fi% back
%
% Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\unless\ifowl@back
\owl@part@draw[\owl@feet] (0.175,0.2) ellipse[x radius=0.03, y radius=0.1];
\owl@part@draw[\owl@feet] (0.225,0.21) ellipse[x radius=0.03, y radius=0.1, rotate=20];
\owl@part@draw[\owl@feet] (0.275,0.23) ellipse[x radius=0.03, y radius=0.1, rotate=40];
\owl@part@draw[\owl@feet] (-0.175,0.2) ellipse[x radius=0.03, y radius=0.1];
\owl@part@draw[\owl@feet] (-0.225,0.21) ellipse[x radius=0.03, y radius=0.1, rotate=-20];
\owl@part@draw[\owl@feet] (-0.275,0.23) ellipse[x radius=0.03, y radius=0.1, rotate=-40];
\fi% back
%
% adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\csname owlhookbody\endcsname
\csname tikzlinghookbody\endcsname
%
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Owl]{Jake, the owl}
%
%\emph{The owl Jake was inspired by the avatar of one of the world's top TikZperts}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[lower separated=false, lefthand width=.8\linewidth]
%\vspace*{0.5cm}
%\lstinline|\usepackage{tikzlings-owls}|
%\vspace*{0.5cm}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{}
%\owl
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic owl can be modified by changing its colour:
%\begin{tcblisting}{}
%\owl[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of various body parts can be adjusted:
%\begin{tcblisting}{}
%\owl[eye=red]
%\end{tcblisting}
%\begin{tcblisting}{}
%\owl[pupil=red]
%\end{tcblisting}
%\begin{tcblisting}{}
%\owl[bill=red]
%\end{tcblisting}
%\begin{tcblisting}{}
%\owl[feet=red]
%\end{tcblisting}
%
%To view the owl from behind:
%\begin{tcblisting}{}
%\owl[back]
%\end{tcblisting}
%
%The key \lstinline|3D| will make the owl 3-dimensional:
%\begin{tcblisting}{}
%\owl[3D]
%\end{tcblisting}
%
%And finally the \lstinline|contour| key will only draw the outlines:
%\begin{tcblisting}{}
%\owl[contour=black]
%\end{tcblisting}