% tkz-obj-eu-polygons.tex
% Copyright 2024  Alain Matthes
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
% This work has the LPPL maintenance status “maintained”.
% The Current Maintainer of this work is Alain Matthes.

\def\fileversion{5.10c}
\def\filedate{2024/04/19} 
\typeout{2024/04/19 5.10c tkz-obj-eu-polygons.tex} 
\makeatletter  
%<--------------------------------------------------------------------------–>
%                                 Polygon 
%<--------------------------------------------------------------------------–>
%<----------------------------   Draw       --------------------------------–>
%
%<--------------------------------------------------------------------------–>
\def\tkzDrawPolygon{\pgfutil@ifnextchar[{\tkz@DrawPolygon}{%
                                         \tkz@DrawPolygon[]}}
\def\tkz@DrawPolygon[#1](#2,#3){%
 \begingroup
 \draw[line style,line join=round,#1] (#2)
     \foreach \pt in {#2,#3}{--(\pt)}--cycle;%
 \endgroup
} 
%<--------------------------------------------------------------------------–>
\def\tkz@multipolygons#1 #2\@nil{% 
\protected@edef\tkz@temp{
\noexpand \tkzDrawPolygon[\tkz@optpolygon](#1)}\tkz@temp% 
\def\tkz@nextArg{#2}%
\ifx\tkzutil@empty\tkz@nextArg
     \let\next\@gobble
\fi
\next#2\@nil
}
%<--------------------------------------------------------------------------–>
\def\tkzDrawPolygons{\pgfutil@ifnextchar[{\tkz@DrawPolygons}{\tkz@DrawPolygons[]}} 
\def\tkz@DrawPolygons[#1](#2){%
\xdef\tkz@optpolygon{#1} 
\begingroup
   \let\next\tkz@multipolygons
   \next#2 \@nil %    
\endgroup     
}% 
%<--------------------------------------------------------------------------–>
%<--------------------------------------------------------------------------–> 
%<----------------------------   FILL       --------------------------------–>
%
%<--------------------------------------------------------------------------–>
\def\tkzFillPolygon{\pgfutil@ifnextchar[{\tkz@FillPolygon}{%
                                         \tkz@FillPolygon[]}} 
\def\tkz@FillPolygon[#1](#2,#3){%
 \begingroup
     \fill[#1] (#2)
   \foreach \pt in {#2,#3}{--(\pt)}--cycle;%  
\endgroup
}
%<--------------------------------------------------------------------------–>
%<--------------   Labels for Regular Polygon      -------------------------–>
%
%<--------------------------------------------------------------------------–>
\pgfkeys{/deflabelregpoly/.cd,
      name/.store in      =   \tkz@regpolname,
      sep/.store in       =   \tkz@regpolsep,
      name        = P,
      sep         = 1.1
}   
 
\def\tkzLabelRegPolygon{\pgfutil@ifnextchar[{\tkz@labelPolygon}{%
                                             \tkz@labelPolygon[]}}  
\def\tkz@labelPolygon[#1](#2)#3{% 
\begingroup 
\pgfqkeys{/deflabelregpoly}{#1}  
 \foreach \v [count=\vi from 1]  in {#3}  {%
  \path (#2) to [pos=1.1] node {$\v$} (\tkz@regpolname\vi) ; 
  \pgfnodealias{\v}{\tkz@regpolname\vi} 
  } 
\endgroup
} 
%<----------------------------   CLIP       --------------------------------–>
%
%<--------------------------------------------------------------------------–>

\pgfkeys{tkzclippolygon/.cd,
       out code/.is if         = tkzClipOutPoly,
       out/.code               = \tkzClipOutPolyfalse}   

\def\tkzClipPolygon{\pgfutil@ifnextchar[{\tkz@ClipPolygon}{\tkz@ClipPolygon[]}}  
\def\tkz@ClipPolygon[#1](#2,#3){%
\tkzClipOutPolytrue
\pgfqkeys{/tkzclippolygon}{#1}%   
\iftkzClipOutPoly
\clip (#2)
   \foreach \pt in {#2,#3}{--(\pt)}--cycle;
\else
   \clip(#2)
    \foreach \pt in {#2,#3}{--(\pt)}--cycle[tkzreverseclip] ;
\fi 
}%
\makeatother
\endinput