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% tkz-tools-angles.tex
% Copyright 2023 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{5.00c}
\def\filedate{2023/01/23}
\typeout{2023/01/23 5.00c tkz-tools-eu-angles.tex}
\makeatletter
%<--------------------------------------------------------------------------–>
%<--------------------------------------------------------------------------–>
% thanks karu : http://tex.stackexchange.com/questions/151667/tkzgetangle-strange-behavior/196224#196224
% \tkzGetAngle strange behavior
% defines \tkz@FirstAngle and \tkz@SecondAngle sens trigo
%<--------------------------------------------------------------------------–>
\def\tkzNormalizeAngle(#1,#2){%
\begingroup
\pgfmathparse{#1}\xdef\tkz@FirstAngle{\pgfmathresult}%
\pgfmathparse{#2}\xdef\tkz@SecondAngle{\pgfmathresult}%
\pgfmathgreaterthan{\tkz@FirstAngle}{0}
\ifdim\pgfmathresult pt=1 pt\relax%
\pgfmathgreaterthan{\tkz@FirstAngle}{\tkz@SecondAngle}
\ifdim\pgfmathresult pt=1 pt\relax%
\pgfmathsubtract{\tkz@FirstAngle}{360}
\xdef\tkz@FirstAngle{\pgfmathresult}%
\fi
\else
\pgfmathgreaterthan{\tkz@FirstAngle}{\tkz@SecondAngle}
\ifdim\pgfmathresult pt=1 pt\relax%
\pgfmathadd{\tkz@SecondAngle}{360}
\xdef\tkz@SecondAngle{\pgfmathresult}%
\fi
\fi
\endgroup
}
%<--------------------------------------------------------------------------–>
% Angle
% Recherche l'angle formé par #1 et #2 par rapport à l'horizontale
%<--------------------------------------------------------------------------–>
\def\tkzFindSlopeAngle(#1,#2){%
\begingroup
\pgfmathanglebetweenpoints{\pgfpointanchor{#1}{center}}{%
\pgfpointanchor{#2}{center}}
\global\let\tkzAngleResult\pgfmathresult
\endgroup
}
%<--------------------------------------------------------------------------–>
% Angle avec trois nodes
%<--------------------------------------------------------------------------–>
\def\tkzFindAngle(#1,#2,#3){% new code 2016
\begingroup
\tkzFindSlopeAngle(#2,#1)\tkzGetAngle{tkz@FirstAngle}
\tkzFindSlopeAngle(#2,#3)\tkzGetAngle{tkz@SecondAngle}
\tkzNormalizeAngle(\tkz@FirstAngle,\tkz@SecondAngle)
\edef\tkz@Angle{\fpeval{\tkz@SecondAngle-\tkz@FirstAngle}}
\global\let\tkzAngleResult\tkz@Angle
\endgroup
}
%<--------------------------------------------------------------------------–>
% Find angle
%<--------------------------------------------------------------------------–>
\def\tkzGetAngle#1{%
\global\expandafter\edef\csname #1\endcsname{\tkzAngleResult}
}
\makeatother
\endinput
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