% tkz-graph-3d.tex -- part of tkz-graph : option 3d
% Copyright 2026  Alain Matthes
% SPDX-License-Identifier: LPPL-1.3c
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
%   https://www.latex-project.org/lppl.txt
% and version 1.3c 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.
%
% Read once by \tkzgr@loadthreed (tkz-graph.sty), with the option 3d
% (LuaLaTeX), after tkz-graph-lua.tex : graphs in space, with the 3D
% module of tkz-elements (package tkz-elements-3d). tkz-elements computes
% the projections and the hidden parts ; tkz-graph draws the vertices and
% the edges. Lua part : tkz_graph_3d.lua (table graph3d). Not a package.
\RequirePackage{tkz-elements-3d}
\directlua{require("tkz_graph_3d")}
% \tkzGraphEdges[options of \Edge]{list A/B,...} ; an empty list gives
% nothing
\def\tkzGraphEdges{\@ifnextchar[{\tkz@GraphEdges}{\tkz@GraphEdges[]}}
\def\tkz@GraphEdges[#1]#2{\edef\tkz@gl{#2}%
  \ifx\tkz@gl\@empty\else
    \foreach \tkz@ga/\tkz@gb in \tkz@gl {\Edge[#1](\tkz@ga)(\tkz@gb)}%
  \fi}
% \tkzGraphVertices[options of \Vertex]{list A,B,...} : \Vertex[Node,...]
\def\tkzGraphVertices{\@ifnextchar[{\tkz@GraphVertices}{\tkz@GraphVertices[]}}
\def\tkz@GraphVertices[#1]#2{\edef\tkz@gl{#2}%
  \ifx\tkz@gl\@empty\else
    \foreach \tkz@gv in \tkz@gl {\Vertex[Node,#1]{\tkz@gv}}%
  \fi}
% \tkzGraphHighlight[options of \tkzHighlightPath]{list A/B,...}
\def\tkzGraphHighlight{\@ifnextchar[{\tkz@GraphHighlight}{\tkz@GraphHighlight[]}}
\def\tkz@GraphHighlight[#1]#2{\edef\tkz@gl{#2}%
  \ifx\tkz@gl\@empty\else
    \edef\tkz@tmp{\noexpand\tkzHighlightPath[\unexpanded{#1}]{\tkz@gl}}\tkz@tmp
  \fi}
\endinput