% !TeX root = ./examples/bug.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-bugs}[2022/06/17 version v1.0 Drawing bugs in TikZ]

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

\newcommand*{\bug}[1][]{%
  \begin{scope}%
    \tikzset{/bug/.cd,#1}%
    \bug@draw%
  \end{scope}%
  \thing[#1]%
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname bughookforeground\endcsname
  \csname tikzlinghookforeground\endcsname
  %   
}

\newif\ifbug@threeD
\newif\ifbug@back
\newif\ifbug@contour

\tikzset{
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Pass unknown keys on to tikz
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  /bug/.search also={/tikz,/pgf,/thing},
  /bug/.cd,
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % body
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  body/.store in     = \bug@body,
  body               = black!90!white,
  arms/.store in     = \bug@arms,
  arms               = red!80!black,  
  wings/.store in    = \bug@wings,
  wings              = red!80!black, 
  dots/.store in     = \bug@dots,
  dots               = black!90!white,     
  antennas/.store in = \bug@antennas,
  antennas           = red!80!black,     
  eye/.store in      = \bug@eye,
  eye                = white,
  pupil/.store in    = \bug@pupil,
  pupil              = black,
  mouth/.store in    = \bug@mouth,
  mouth              = red,     
  feet/.store in     = \bug@feet,
  feet               = red!80!black, 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % options
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  3D/.code           = \bug@threeDtrue,  
  back/.code         = \bug@backtrue,       
  contour/.code      = \bug@contourtrue
                       \def\bug@contour{#1}
                       \def\bug@antennas{#1}
                       \def\bug@mouth{#1},
  contour/.default   = black,  
  outline/.forward to = /bug/contour,   
}

\def\bug@draw{%
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % minimal bounding box size 
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \path (-0.92,0.02) rectangle (0.92, 2.36);
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % 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
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifbug@threeD
    \def\bug@part@draw[##1]{\shade[ball color=##1]}
  \else% 3D
    \ifbug@contour
      \def\bug@part@draw[##1]{\draw[##1,\bug@contour,fill=white,line width=\scalingfactor*0.4pt]}
    \else% contour
      \def\bug@part@draw[##1]{\fill[##1]}
    \fi% contour
  \fi% 3D
  %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % Body parts
  % 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname bugshookbackground\endcsname
  \csname tikzlinghookbackground\endcsname
  %
  \ifbug@back
    %  
    % Antenna %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \draw[\bug@antennas,line width=\scalingfactor*0.8pt] (0.1134, 1.911) .. controls (0.0917, 2.0537) and (0.0986, 2.1999) .. (0.1608, 2.2816) .. controls (0.245, 2.3919) and (0.3278, 2.3011) .. (0.3272, 2.2192) .. controls (0.3266, 2.1341) and (0.2237, 2.0423) .. (0.1978, 2.1538);
    \draw[\bug@antennas,line width=\scalingfactor*0.8pt] (-0.1134, 1.911) .. controls (-0.0917, 2.0537) and (-0.0986, 2.1999) .. (-0.1608, 2.2816) .. controls (-0.245, 2.3919) and (-0.3278, 2.3011) .. (-0.3272, 2.2192) .. controls (-0.3266, 2.1341) and (-0.2237, 2.0423) .. (-0.1978, 2.1538);
  \else% back
    %
    % Wings %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \bug@part@draw[\bug@wings] (-0.0955, 1.4222) .. controls (-0.2086, 1.6765) and (-0.692, 1.2508) .. (-0.8174, 1.0023) .. controls (-0.9304, 0.7786) and (-0.9533, 0.379) .. (-0.7355, 0.2548) .. controls (-0.5988, 0.1768) and (-0.4043, 0.3269) .. (-0.3054, 0.4494) .. controls (-0.097, 0.7075) and (0.0589, 1.0749) .. (-0.0955, 1.4222) -- cycle;       
    \bug@part@draw[\bug@wings] (0.0955, 1.4222) .. controls (0.2086, 1.6765) and (0.692, 1.2508) .. (0.8174, 1.0023) .. controls (0.9304, 0.7786) and (0.9533, 0.379) .. (0.7355, 0.2548) .. controls (0.5988, 0.1768) and (0.4043, 0.3269) .. (0.3054, 0.4494) .. controls (0.097, 0.7075) and (-0.0589, 1.0749) .. (0.0955, 1.4222) -- cycle;
    \ifbug@contour
      \bug@part@draw[\bug@dots] (-0.2,0.85) circle [radius=0.08] (-0.5,0.8) circle [radius=0.08] (-0.8,0.75) circle [radius=0.08] (-0.35,0.6) circle [radius=0.08] (-0.65,0.5) circle [radius=0.08] (-0.3,1.05) circle [radius=0.08] (-0.6,1.1) circle [radius=0.08] (-0.35,1.35) circle [radius=0.08] (0.2,0.85) circle [radius=0.08] (0.5,0.8) circle [radius=0.08] (0.8,0.75) circle [radius=0.08] (0.35,0.6) circle [radius=0.08] (0.65,0.5) circle [radius=0.08] (0.3,1.05) circle [radius=0.08] (0.6,1.1) circle [radius=0.08] (0.35,1.35) circle [radius=0.08];     
    \else% contour 
      \fill[\bug@dots] (-0.2,0.85) circle [radius=0.08] (-0.5,0.8) circle [radius=0.08] (-0.8,0.75) circle [radius=0.08] (-0.35,0.6) circle [radius=0.08] (-0.65,0.5) circle [radius=0.08] (-0.3,1.05) circle [radius=0.08] (-0.6,1.1) circle [radius=0.08] (-0.35,1.35) circle [radius=0.08] (0.2,0.85) circle [radius=0.08] (0.5,0.8) circle [radius=0.08] (0.8,0.75) circle [radius=0.08] (0.35,0.6) circle [radius=0.08] (0.65,0.5) circle [radius=0.08] (0.3,1.05) circle [radius=0.08] (0.6,1.1) circle [radius=0.08] (0.35,1.35) circle [radius=0.08];      
    \fi% contour
  \fi% back
  %
  % Feet %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \bug@part@draw[\bug@feet] (0.2,0.1) ellipse[x radius=0.18, y radius=0.06]; 
  \bug@part@draw[\bug@feet] (-0.2,0.1) ellipse[x radius=0.18, y radius=0.06];
  %
  % Body %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \bug@part@draw[\bug@body]  ( 0.55, 0.75) .. controls ( 0.55, 0.40) and ( 0.55, 0.08) .. ( 0.00, 0.08) .. controls (-0.55, 0.08) and (-0.55, 0.40) .. (-0.55, 0.75) .. controls (-0.55, 1.13) and (-0.30, 1.44) .. ( 0.00, 1.44) .. controls ( 0.30, 1.44) and ( 0.55, 1.13) .. ( 0.55, 0.75) -- cycle;
  %
  % Head %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \bug@part@draw[\bug@body] (0,1.7) circle [radius=0.37];
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname bugshookbelly\endcsname
  \csname tikzlinghookbelly\endcsname
  %
  % Show details only from the front %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \ifbug@back
    %
    % Wings %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \bug@part@draw[\bug@wings] (-0.0955, 1.4222) .. controls (-0.2086, 1.6765) and (-0.692, 1.2508) .. (-0.8174, 1.0023) .. controls (-0.9304, 0.7786) and (-0.9533, 0.379) .. (-0.7355, 0.2548) .. controls (-0.5988, 0.1768) and (-0.4043, 0.3269) .. (-0.3054, 0.4494) .. controls (-0.097, 0.7075) and (0.0589, 1.0749) .. (-0.0955, 1.4222) -- cycle;       
    \bug@part@draw[\bug@wings] (0.0955, 1.4222) .. controls (0.2086, 1.6765) and (0.692, 1.2508) .. (0.8174, 1.0023) .. controls (0.9304, 0.7786) and (0.9533, 0.379) .. (0.7355, 0.2548) .. controls (0.5988, 0.1768) and (0.4043, 0.3269) .. (0.3054, 0.4494) .. controls (0.097, 0.7075) and (-0.0589, 1.0749) .. (0.0955, 1.4222) -- cycle;
    \ifbug@contour
      \bug@part@draw[\bug@dots] (-0.2,0.85) circle [radius=0.08] (-0.5,0.8) circle [radius=0.08] (-0.8,0.75) circle [radius=0.08] (-0.35,0.6) circle [radius=0.08] (-0.65,0.5) circle [radius=0.08] (-0.3,1.05) circle [radius=0.08] (-0.6,1.1) circle [radius=0.08] (-0.35,1.35) circle [radius=0.08] (0.2,0.85) circle [radius=0.08] (0.5,0.8) circle [radius=0.08] (0.8,0.75) circle [radius=0.08] (0.35,0.6) circle [radius=0.08] (0.65,0.5) circle [radius=0.08] (0.3,1.05) circle [radius=0.08] (0.6,1.1) circle [radius=0.08] (0.35,1.35) circle [radius=0.08];     
    \else% contour
      \fill[\bug@dots] (-0.2,0.85) circle [radius=0.08] (-0.5,0.8) circle [radius=0.08] (-0.8,0.75) circle [radius=0.08] (-0.35,0.6) circle [radius=0.08] (-0.65,0.5) circle [radius=0.08] (-0.3,1.05) circle [radius=0.08] (-0.6,1.1) circle [radius=0.08] (-0.35,1.35) circle [radius=0.08] (0.2,0.85) circle [radius=0.08] (0.5,0.8) circle [radius=0.08] (0.8,0.75) circle [radius=0.08] (0.35,0.6) circle [radius=0.08] (0.65,0.5) circle [radius=0.08] (0.3,1.05) circle [radius=0.08] (0.6,1.1) circle [radius=0.08] (0.35,1.35) circle [radius=0.08];      
    \fi% contour
  \else% back
    %
    % Eyes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \bug@part@draw[\bug@eye] (0.13,1.75) ellipse[x radius=0.067, y radius=0.085];
    \bug@part@draw[\bug@eye] (-0.13,1.75) ellipse[x radius=0.067, y radius=0.085];
    \bug@part@draw[\bug@pupil] (0.12,1.73) ellipse[x radius=0.019, y radius=0.029];
    \bug@part@draw[\bug@pupil] (-0.12,1.73) ellipse[x radius=0.019, y radius=0.029];
    %
    % Arms %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \bug@part@draw[\bug@arms] (-0.25,0.88) circle[x radius=0.07,y radius=0.18, rotate=35];
    \bug@part@draw[\bug@arms] (0.25,0.88) circle[x radius=0.07,y radius=0.18, rotate=-35];
    %
    % Mouth %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \draw[\bug@mouth,line width=\scalingfactor*0.4pt] (0.115, 1.56) arc [start angle=-40, end angle=-140, radius=0.16];
    % 
    % Antenna %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    \draw[\bug@antennas,line width=\scalingfactor*0.8pt] (0.1134, 1.911) .. controls (0.0917, 2.0537) and (0.0986, 2.1999) .. (0.1608, 2.2816) .. controls (0.245, 2.3919) and (0.3278, 2.3011) .. (0.3272, 2.2192) .. controls (0.3266, 2.1341) and (0.2237, 2.0423) .. (0.1978, 2.1538);
    \draw[\bug@antennas,line width=\scalingfactor*0.8pt] (-0.1134, 1.911) .. controls (-0.0917, 2.0537) and (-0.0986, 2.1999) .. (-0.1608, 2.2816) .. controls (-0.245, 2.3919) and (-0.3278, 2.3011) .. (-0.3272, 2.2192) .. controls (-0.3266, 2.1341) and (-0.2237, 2.0423) .. (-0.1978, 2.1538);
    %
  \fi% back
  %
  % adding hook for users to customise %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \csname bugshookbody\endcsname
  \csname tikzlinghookbody\endcsname
  %
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Documentation
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\clearpage
%\section[Bug]{Marie, the bug}
%
%\emph{For a French girl who likes ladybugs -- the name comes from the German word for ladybug ``Marienkäfer''}
%
%\subsection{Package name}
%
%\begin{tcolorbox}[lower separated=false, lefthand width=.8\linewidth]
%\vspace*{0.5cm}
%\lstinline|\usepackage{tikzlings-bugs}| 
%\vspace*{0.5cm}
%\end{tcolorbox}
%
%\subsection{Basic Usage}
%
%\begin{tcblisting}{}
%\bug
%\end{tcblisting}
%
%\subsection{Options}
%
%The basic bug can be modified by changing its colour:
%\begin{tcblisting}{}
%\bug[body=blue]
%\end{tcblisting}
%
%In addition to the colour of the body, the colour of various body parts can be adjusted:
%\begin{tcblisting}{}
%\bug[antennas=blue]
%\end{tcblisting}
%\begin{tcblisting}{}
%\bug[eye=blue]
%\end{tcblisting}
%\begin{tcblisting}{}
%\bug[pupil=blue]
%\end{tcblisting}
%\begin{tcblisting}{}
%\bug[mouth=blue]
%\end{tcblisting}
%\begin{tcblisting}{}
%\bug[arms=blue]
%\end{tcblisting}
%\begin{tcblisting}{}
%\bug[wings=blue]
%\end{tcblisting}
%\begin{tcblisting}{}
%\bug[feet=blue]
%\end{tcblisting}
%
%To view the bug from behind:
%\begin{tcblisting}{}
%\bug[back]
%\end{tcblisting}
%
%The key \lstinline|3D| will make the bug 3-dimensional:
%\begin{tcblisting}{}
%\bug[3D]
%\end{tcblisting}
%
%And finally the \lstinline|contour| key will only draw the outlines:
%\begin{tcblisting}{}
%\bug[contour=black]
%\end{tcblisting}