% tkz-obj-eu-compass.tex
% Copyright 2020  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.

%  utf8 encoding
\def\fileversion{3.05c}
\def\filedate{2020/03/03} 
\typeout{2020/03/03 3.05c tkz-obj-eu-compass.tex}  
\makeatletter
%<--------------------------------------------------------------------------–>
%  Author Alain Matthes  
%   idea from Y. Combe   
%<--------------------------------------------------------------------------–>
%<--------------------------------------------------------------------------–>
%                Utilisation du Compas : Compass   
%<--------------------------------------------------------------------------–>
%                                Setup   Compass
%<--------------------------------------------------------------------------–>
\pgfkeys{tkzsucompass/.cd,
	line width/.code   =     {\global\edef\tkz@compass@lw{#1}},
	color/.code        =     {\global\edef\tkz@compass@color{#1}},
	style/.code        =     {\global\edef\tkz@compass@style{#1}},
	} 
%<--------------------------------------------------------------------------–>
\def\tkzSetUpCompass{\pgfutil@ifnextchar[{\tkz@SetUpCompass}{% remove tkzActivOff 3.03
                                          \tkz@SetUpCompass[]}}
%<--------------------------------------------------------------------------–>
\def\tkz@SetUpCompass[#1]{% 
\pgfkeys{tkzsucompass/.cd,
	line width   = \tkz@euc@compasswidth,
	color        = \tkz@euc@compasscolor,
	style        = \tkz@euc@compassstyle,
 /tkzsucompass/.search also   		     = {/tikz}
}  
\pgfqkeys{/tkzsucompass}{#1}
\tikzset{compass style/.style={color       = \tkz@compass@color,
                               line width  = \tkz@compass@lw,
                               style       = \tkz@compass@style
                            }}
}
%<--------------------------------------------------------------------------–> 
%                \tkzCompass(A, B)
%
% Marque de compas auto-ajustée en longueur
%               #2 center #3 le point
% Par défaut: 
%                 longueur : 1cm, mais avec un maximum d'un angle de 180°
%                 angle calculé pour la longueur
%                 style traits pleins

%<--------------------------------------------------------------------------–> 
 \pgfkeys{
    /tkzcompass/delta/.code      = {\def\tkz@delta{#1}},
    /tkzcompass/length/.code     = {\def\tkz@length{#1}},
    /tkzcompass/ratio/.code      = {\def\tkz@ratio{#1}},  
    /tkzcompass/.unknown/.code   = {\let\searchname=\pgfkeyscurrentname
                                    \pgfkeysalso{\searchname/.try=#1,
                                  /tikz/\searchname/.retry=#1}}
}
                                        
\def\tkzCompass{\pgfutil@ifnextchar[{\tkz@Compass}{\tkz@Compass[]}}
\def\tkz@Compass[#1](#2,#3){%   
\begingroup
\pgfkeys{%
  	tkzcompass/.cd,
  	length = 1,
  	delta  = 0,
  	ratio  = .5
  	}
\pgfkeys{tkzcompass/.cd,#1}  
\tkzCalcLength(#2,#3)\tkzGetLength{tkz@tempLen}  
\ifnum\tkz@delta=0 %
   \pgfmathsetmacro{\tkz@delta}{min(deg(\tkz@length cm/ \tkz@tempLen pt),180)/2}
\fi 
\tkzFindSlopeAngle(#2,#3)\tkzGetAngle{tkz@angle}%
\draw[shift ={(#2)},/tkzcompass/.cd,compass style,#1]%
    (\tkz@angle-\tkz@delta:\tkz@tempLen pt)%
  arc (\tkz@angle-\tkz@delta:\tkz@angle+\tkz@delta:\tkz@tempLen pt);
\endgroup}
%<--------------------------------------------------------------------------–> 
\def\tkz@multiCompass#1 #2\@nil{% 
 \protected@edef\tkz@temp{
   \noexpand \tkzCompass[\tkz@optcompass](#1)}\tkz@temp% 
   \def\tkz@nextArg{#2}%
   \ifx\tkzutil@empty\tkz@nextArg
     \let\next\@gobble
   \fi
   \next#2\@nil
}
\def\tkzCompasss{\pgfutil@ifnextchar[{\tkz@Compasss}{\tkz@Compasss[]}}   

\def\tkz@Compasss[#1](#2){%
\global\edef\tkz@optcompass{#1} 
\begingroup
   \let\next\tkz@multiCompass
   \next#2 \@nil %    
\endgroup
}%

\makeatother
\endinput 
 