% encoding : utf8 
% tkz-elements.sty v4.20c
% Copyright 2025  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.

\ProvidesPackage{tkz-elements}[2025/06/15 version 4.15c Graphic Object Library]
\RequirePackage{iftex}
\ifluatex\else
  \PackageError{tkz-elements}{%
    This package requires LuaLaTeX.%
  }{%
    Please compile with LuaLaTeX.\MessageBreak
    Aborted compilation.%
  }
\fi
 \directlua{
      require "tkz_elements_main"
      init_elements()}%
      
\newenvironment{tkzelements}
  {  \directlua{ z = {}
                 C = {}
                 L = {}
                 M = {}
                 O = {}
                 P = {}
                 PA = {}
                 Q = {}
                 R = {}
                 RP= {}
                 S = {}
                 T = {}
                 V = {}
                 CO={}}
      \luacode}
  {\endluacode}%

% new version of the next macro proposed by Sanskar Singh
\makeatletter
\let\percentchar\@percentchar
\@ifpackageloaded{tkz-euclide}{%
  \@ifpackagelater{tkz-euclide}{2024/04/19}{%
   \def\tkzGetNodes{\directlua{%
     for K,V in pairs(z) do
        local n,sd,ft
        n = string.len(K)
        if n > 1 then
        _,_,ft, sd = string.find(K, "(.+)(.)" )  
       if sd == "p" then   K=ft.."'" end
       _,_,xft, xsd = string.find(ft, "(.+)(.)" )
       if xsd == "p" then  K=xft.."'".."'" end
         end    
    tex.sprint("\\coordinate ("..K..") at ("..V.re..","..V.im..") ; \string\r")
   end
   }} 
\def\tkzDrawLuaEllipse{\pgfutil@ifnextchar[{\tkz@DrawLuaEllipse}{\tkz@DrawLuaEllipse[]}}
\def\tkz@DrawLuaEllipse[#1](#2,#3,#4){% 
\begingroup 
\draw[#1](#2) ellipse [x radius=\tkzUseLua{length_(z.#3,z.#2)}, y radius =   
 \tkzUseLua{length_(z.#4,z.#2)},rotate=\tkzUseLua{math.deg(slope_ (z.#3,z.#2))}]; 
\endgroup}%
 
\def\tkzDrawCoordinates{\pgfutil@ifnextchar[{\tkz@DrawCoordinates}{\tkz@DrawCoordinates[]}}
\def\tkz@DrawCoordinates[#1](#2){% 
\begingroup 
\draw[#1] plot coordinates {\directlua{tex.print(#2)}}; 
\endgroup}%
 
 \let\tkzDrawPath\tkzDrawCoordinates 
 
\def\tkzDrawPointOnCurve{\pgfutil@ifnextchar[{\tkz@DrawPointOnCurve}{\tkz@DrawPointOnCurve[]}}
\def\tkz@DrawPointOnCurve[#1](#2){% 
\begingroup 
    \draw[#1] plot coordinates {(#2)};
\endgroup}%
   
\def\tkzPrintNumber{\pgfutil@ifnextchar[{\tkz@PrintNumber}{\tkz@PrintNumber[2]}}%
\def\tkz@PrintNumber[#1]#2{%
  \begingroup
    \pgfkeys{/pgf/number format/.cd,fixed,precision=#1}%
    \pgfmathprintnumber{#2}%
  \endgroup
}
\let\tkzPN\tkzPrintNumber

\def\tkzDrawSegmentsFromPaths{\pgfutil@ifnextchar[{\tkz@DrawSegmentsFromPaths}{\tkz@DrawSegmentsFromPaths[]}}
\def\tkz@DrawSegmentsFromPaths[#1](#2,#3){%
\begingroup
\directlua{%
  for i = 1, #2:count() do
    local x1, y1 = #2:get_number_path(i)
    local x2, y2 = #3:get_number_path(i)
    tex.print("\\tkzDefPoint("..x1..","..y1.."){start}")
    tex.print("\\tkzDefPoint("..x2..","..y2.."){end}")
    tex.print("\\tkzDrawSegment[" .. "\luatexluaescapestring{#1}" .. "](start,end)")
   end
}%
\endgroup}%

\def\tkzUseLua#1{\directlua{tex.sprint(#1)}} 

\def\tkzDrawPointsFromPath{\pgfutil@ifnextchar[{\tkz@DrawPointsFromPath}{\tkz@DrawPointsFromPath[]}}
\def\tkz@DrawPointsFromPath[#1](#2){%
  \begingroup
   \foreach[expand list] \r/\s in {\directlua{tex.sprint(#2:concat_rawpair(","))}} {%
    \tkzDrawPoint[#1](\r,\s)%
  }%
  \endgroup
}

\def\tkzGetPointsFromPath{\pgfutil@ifnextchar[{\tkz@GetPointsFromPath}{%
\tkz@GetPointsFromPath[]}}
\def\tkz@GetPointsFromPath[#1](#2,#3){%
  \begingroup
   \foreach[expand list][count = \i] \r/\s in {\directlua{tex.sprint(#2:concat_rawpair(","))}} {%
    \tkzDefPoint(\r,\s){#3_\i}%
  }%
  \endgroup
}
\def\tkzDrawCirclesFromPaths{\pgfutil@ifnextchar[{\tkz@DrawCirclesFromPaths}{\tkz@DrawCirclesFromPaths[]}}
\def\tkz@DrawCirclesFromPaths[#1](#2,#3){%
  \begingroup
  \directlua{
    for i = 1, #2:count() do
      local cx, cy = #2:get_number_path(i)
      local tx, ty = #3:get_number_path(i)
      tex.print("\\node[" .. "\luatexluaescapestring{#1}" .. ",circle through={(" .. tx .. "," .. ty .. ")}] at (" .. cx .. "," .. cy .. ") {};")
    end
  }
  \endgroup
}

}{%
\PackageWarning{tkz-elements}{%
      tkz-euclide is loaded but too old.\MessageBreak
      Minimum version required : 5.10c 2024/04/19%
}}}{%
}%


\def\tkzGetNodesMP#1{\directlua{
  local out = assert(io.open("#1.mp", "w"))
  local names = {}
  for K, _ in pairs(z) do
    table.insert(names, tostring(K))
  end
  table.sort(names)
  out:write("pair ", table.concat(names, ", "), ";\string\n")
  for _, name in ipairs(names) do
    local V = z[name]
    if V then
      out:write(name, " := (", V.re, "cm,", V.im, "cm);\string\n")
    end
  end
  out:close()
}}
\makeatother
\def\tkzEraseLuaObj#1{\directlua{#1 = nil}}
\endinput