    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %                                                               %
    %     tk-graphes.sty    encodage : utf8                         %
    %                                                               %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %                                                               %
    %           Créé par Alain Matthes le 22-02-2011.               %
    %        contribution :  Rafael Villarroel    (RV)              %
    %                                                               %
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<--------------------------------------------------------------------------->
% Objet :  Création de graphes
%<--------------------------------------------------------------------------->
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{tkz-graph}[2018/09/19 ctan v  1.00 d base for graphs]
%<--------------------------------------------------------------------------->
\ifx\e@alloc\@undefined
  \RequirePackage{etex}
\fi
\RequirePackage{ifthen}
\RequirePackage{xkeyval}[2005/11/25]
\RequirePackage{tikz}
\usetikzlibrary{arrows}  
%<--------------------------------------------------------------------------->
% todo remove some counters
\newcounter{tkz@gr@a}
\newcounter{tkz@gr@b}
\newcounter{tkz@gr@c}
\newcounter{tkz@gr@e}
\newcounter{tkz@gr@d}
\newcounter{tkz@gr@p}
\newcounter{tkz@gr@i}
\newcounter{tkz@gr@n}
\newcounter{tkz@gr@ta}
\newcounter{tkz@gr@tb}
%<--------------------------------------------------------------------------->
%                           Init vertex  
%<--------------------------------------------------------------------------->
\global\def\tkzActivOff{%
\edef\tkzTwoPtCode{\the\catcode`\:} 
\edef\tkzPtExCode{\the\catcode`\!} 
\edef\tkzPtVirCode{\the\catcode`\;} 
\catcode`\:=12 \catcode`\!=12 \catcode`\;=12}%
\global\def\tkzActivOn{%
\catcode`\:=\tkzTwoPtCode\relax
\catcode`\!=\tkzPtExCode\relax
\catcode`\;=\tkzPtVirCode\relax
}%
%<--------------------------------------------------------------------------->
\def\tkz@gr@background@color{white}
\def\tkz@gr@text@color{black} 
\global\edef\tkz@suc@bkc{\tkz@gr@background@color}
\global\edef\tkz@suc@txt{\tkz@gr@text@color}
\pgfkeys{
/tkzsupcol/.cd,
  background/.code    = {\global\edef\tkz@suc@bkc{#1}},
  text/.code          = {\global\edef\tkz@suc@txt{#1}},
} 
\def\tkzSetUpColors{\pgfutil@ifnextchar[{\tkz@SetUpColors}{\tkz@SetUpColors[]}} 
\def\tkz@SetUpColors[#1]{%
\begingroup
\pgfkeys{%
tkzsupcol/.cd,
  background  = \tkz@gr@background@color,
  text        = \tkz@gr@text@color
  }
\pgfqkeys{/tkzsupcol}{#1}
\pagecolor{\tkz@suc@bkc}
\color{\tkz@suc@txt}
\endgroup 
} 

\newcommand*{\GraphUnit}{1}
\newcommand*{\VertexInnerSep}{2pt}
\newcommand*{\VertexOuterSep}{0pt}
\newcommand*{\VertexDistance}{3cm}
\newcommand*{\VertexShape}{circle}
\newcommand*{\VertexLineWidth}{0.5pt}
\newcommand*{\VertexLineColor}{\tkz@suc@txt}
\newcommand*{\VertexLightFillColor}{\tkz@suc@bkc}
\newcommand*{\VertexDarkFillColor}{\tkz@suc@txt}
\newcommand*{\VertexTextColor}{\tkz@suc@txt}
\newcommand*{\VertexFillColor}{\tkz@suc@txt}
\newcommand*{\VertexBallColor}{orange}
\newcommand*{\VertexBigMinSize}{24pt}
\newcommand*{\VertexInterMinSize}{18pt}
\newcommand*{\VertexSmallMinSize}{12pt}
\newcommand*{\EdgeFillColor}{orange}
\newcommand*{\EdgeArtColor}{orange}
\newcommand*{\EdgeColor}{\tkz@suc@txt}
\newcommand*{\EdgeDoubleDistance}{1pt}
\newcommand*{\EdgeLineWidth}{0.8pt}
\newcommand*{\LabelTextColor}{\tkz@suc@txt}
\newcommand*{\LabelFillColor}{\tkz@suc@bkc}

\tikzset{pre/.style={<-,shorten <=1pt,>=stealth',semithick}}
\tikzset{post/.style={->,shorten <=1pt,>=stealth',semithick}}
%<--------------------------------------------------------------------------->
%   Simple Vertex
%<--------------------------------------------------------------------------->
\define@cmdkey [GR] {SVS} {Shape}{}
\define@cmdkey [GR] {SVS} {MinSize}{}
\define@cmdkey [GR] {SVS} {LineWidth}{}
\define@cmdkey [GR] {SVS} {LineColor}{}
\define@cmdkey [GR] {SVS} {FillColor}{}
\define@cmdkey [GR] {SVS} {InnerSep}{}
\define@cmdkey [GR] {SVS} {OuterSep}{}
\presetkeys    [GR] {SVS} {Shape          = \VertexShape,
                           MinSize        = \VertexSmallMinSize,
                           LineWidth      = \VertexLineWidth,
                           LineColor      = \VertexLineColor,
                           InnerSep       = \VertexInnerSep,
                           OuterSep       = \VertexOuterSep,
                           FillColor      = \VertexFillColor}{}
\newcommand*{\SetVertexSimple}[1][]{\GR@SetVertexSimple[#1]}%
\def\GR@SetVertexSimple[#1]{%
\setkeys[GR]{SVS}{#1}% 
\presetkeys[GR]{vertex}{NoLabel           = true}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \cmdGR@SVS@Shape,
                               color          = \cmdGR@SVS@LineColor,
                               fill           = \cmdGR@SVS@FillColor,
                               inner sep      = \cmdGR@SVS@InnerSep,
                               outer sep      = \cmdGR@SVS@OuterSep,
                               minimum size   = \cmdGR@SVS@MinSize,
                               line width     = \cmdGR@SVS@LineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                \EdgeColor}}
\tikzset{LabelStyle/.style={}}}
%<--------------------------------------------------------------------------->
%   Shade Vertex
%<--------------------------------------------------------------------------->
\define@cmdkey [GR] {shade} {Shape}{}
\define@cmdkey [GR] {shade} {MinSize}{}
\define@cmdkey [GR] {shade} {LineWidth}{}
\define@cmdkey [GR] {shade} {LineColor}{}
\define@cmdkey [GR] {shade} {BallColor}{}
\define@cmdkey [GR] {shade} {InnerSep}{}
\define@cmdkey [GR] {shade} {OuterSep}{}
\presetkeys    [GR] {shade} {Shape          = \VertexShape,
                             MinSize        = \VertexBigMinSize,
                             LineWidth      = \VertexLineWidth,
                             LineColor      = \VertexLineColor,
                             InnerSep       = \VertexInnerSep,
                             OuterSep       = \VertexOuterSep,
                             BallColor      = \VertexBallColor}{}
\newcommand*{\SetVertexShade}[1][]{\GR@SetVertexShade[#1]}%
\def\GR@SetVertexShade[#1]{%
\setkeys[GR]{shade}{#1}% 
\presetkeys[GR]{vertex}{NoLabel           = false}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \cmdGR@shade@Shape,
                               ball color     = \cmdGR@shade@BallColor,
                               inner sep      = \cmdGR@shade@InnerSep,
                               outer sep      = \cmdGR@shade@OuterSep,
                               minimum size   = \cmdGR@shade@MinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                \EdgeColor,% color outside
                               double          = \EdgeFillColor,% inside
                               double distance = \EdgeDoubleDistance}}%
\tikzset{LabelStyle/.style={}}}
%<--------------------------------------------------------------------------->
%   Art Vertex
%<--------------------------------------------------------------------------->
\define@cmdkey [GR] {art} {Shape}{}
\define@cmdkey [GR] {art} {MinSize}{}
\define@cmdkey [GR] {art} {LineWidth}{}
\define@cmdkey [GR] {art} {LineColor}{}
\define@cmdkey [GR] {art} {BallColor}{}
\define@cmdkey [GR] {art} {InnerSep}{}
\define@cmdkey [GR] {art} {OuterSep}{}
\presetkeys    [GR] {art} {Shape          = \VertexShape,
                           MinSize        = \VertexSmallMinSize,
                           LineWidth      = \VertexLineWidth,
                           LineColor      = \VertexLineColor,
                           InnerSep       = \VertexInnerSep,
                           OuterSep       = \VertexOuterSep,
                           BallColor      = \VertexBallColor}{}
\newcommand*{\SetVertexArt}[1][]{\GR@SetVertexArt[#1]}%
\def\GR@SetVertexArt[#1]{%
\setkeys[GR]{art}{#1}% 
\presetkeys[GR]{vertex}{NoLabel               = true}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \cmdGR@art@Shape,
                               ball color     = \cmdGR@art@BallColor,
                               inner sep      = \cmdGR@art@InnerSep,
                               outer sep      = \cmdGR@art@OuterSep,
                               minimum size   = \cmdGR@art@MinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                 \EdgeArtColor}}
\tikzset{LabelStyle/.style  = {}}}
%<--------------------------------------------------------------------------->
%   Normal Vertex
%<--------------------------------------------------------------------------->
\define@cmdkey [GR] {SVN} {Shape}{}
\define@cmdkey [GR] {SVN} {MinSize}{}
\define@cmdkey [GR] {SVN} {LineWidth}{}
\define@cmdkey [GR] {SVN} {LineColor}{}
\define@cmdkey [GR] {SVN} {FillColor}{}
\define@cmdkey [GR] {SVN} {TextColor}{}
\define@cmdkey [GR] {SVN} {InnerSep}{}
\define@cmdkey [GR] {SVN} {OuterSep}{}
\presetkeys    [GR] {SVN} {Shape              = \VertexShape,
                           MinSize            = \VertexInterMinSize,
                           LineWidth          = \VertexLineWidth,
                           LineColor          = \VertexLineColor,
                           FillColor          = \VertexLightFillColor,
                           InnerSep           = \VertexInnerSep,
                           OuterSep           = \VertexOuterSep,
                           TextColor          = \VertexTextColor}{}
\newcommand*{\SetVertexNormal}[1][]{\GR@SetVertexNormal[#1]}%
\def\GR@SetVertexNormal[#1]{%
\setkeys[GR]{SVN}{#1}% 
\tikzset{VertexStyle/.style = {shape          = \cmdGR@SVN@Shape,
                               minimum size   = \cmdGR@SVN@MinSize,
                               line width     = \cmdGR@SVN@LineWidth,
                               color          = \cmdGR@SVN@LineColor,
                               fill           = \cmdGR@SVN@FillColor,
                               text           = \cmdGR@SVN@TextColor,
                               inner sep      = \cmdGR@SVN@InnerSep,
                               outer sep      = \cmdGR@SVN@OuterSep,
                               draw}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                 \EdgeColor}}
\tikzset{LabelStyle/.style={}}}
\SetVertexNormal% default
%<--------------------------------------------------------------------------->
\define@cmdkey [GR] {init} {unit}{}
\define@choicekey*[GR]{init}{vstyle}[\val\nr]{Empty,%
                                              Hasse,%
                                              Simple,%
                                              Classic,%
                                              Normal,%
                                              Shade,%
                                              Dijkstra,%
                                              Welsh,%
                                              Art,%
                                              Shade Art}{%
\edef\GR@init@vstyle{\nr}
\ifcase\nr\relax
% Empty
\presetkeys [GR] {vertex} {LabelOut           = false}{}%
\tikzset{VertexStyle/.style = {shape          = \VertexShape,
                               color          = \VertexLineColor,
                               fill           = \VertexLightFillColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = 0.5\pgflinewidth,
                               text           = \VertexTextColor,
                               minimum size   = \VertexSmallMinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width = \EdgeLineWidth,\EdgeColor}}
\tikzset{LabelStyle/.style={}}
\or
% Hasse
\presetkeys [GR] {vertex} {NoLabel            = true}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \VertexShape,
                               color          = \VertexLineColor,
                               fill           = \VertexLightFillColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = 0.5\pgflinewidth,
                               text           = \VertexTextColor,
                               minimum size   = \VertexSmallMinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                \EdgeColor}}
\tikzset{LabelStyle/.style={}}
\or
% Simple
\presetkeys [GR] {vertex} {NoLabel            = true}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \VertexShape,
                               color          = \VertexLineColor,
                               fill           = \VertexDarkFillColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = 0.5\pgflinewidth,
                               text           = \VertexTextColor,
                               minimum size   = \VertexSmallMinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                \EdgeColor}}
\tikzset{LabelStyle/.style={}}
% Classic
\or
\presetkeys [GR] {vertex} {LabelOut           = true}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \VertexShape,
                               color          = \VertexLineColor,
                               fill           = \VertexDarkFillColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = 0.5\pgflinewidth,
                               text           = \VertexTextColor,
                               minimum size   = \VertexSmallMinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                \EdgeColor}}
\tikzset{LabelStyle/.style={}}
% Normal 
\or
\presetkeys [GR] {vertex} {LabelOut            = false}{}%
\tikzset{VertexStyle/.style = {draw,           
                               shape           = \VertexShape,
                               minimum size    = \VertexInterMinSize,
                               line width      = \VertexLineWidth,
                               color           = \VertexLineColor,
                               outer sep       = 0.5\pgflinewidth,
                               fill            = \VertexLightFillColor,
                               text            = \VertexTextColor,
                               line width      = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width      = \EdgeLineWidth,
                                                 \EdgeColor}}
\tikzset{LabelStyle/.style={}}                 
% Shade                                        
\or                                            
\presetkeys [GR] {vertex} {LabelOut            = false}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape           = \VertexShape,
                               ball color      = \VertexBallColor,
                               color           = \VertexLineColor,
                               text            = \VertexTextColor,
                               inner sep       = \VertexInnerSep,
                               outer sep       = \VertexOuterSep,
                               minimum size    = \VertexBigMinSize,
                               line width      = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width      = \EdgeLineWidth,
                                                 \EdgeColor,% color outside
                               double          = \EdgeFillColor,% inside
                               double distance = \EdgeDoubleDistance}}%
\tikzset{LabelStyle/.style={}}
% Dijkstra
\or
\presetkeys [GR] {vertex} {LabelOut           = false}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \VertexShape,
                               color          = \VertexLineColor,
                               fill           = \VertexLightFillColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = 0.5\pgflinewidth,
                               text           = \VertexTextColor,
                               minimum size   = \VertexInterMinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                \EdgeColor}}
\tikzset{LabelStyle/.style={}}
% Welsh
\or
\presetkeys [GR] {vertex} {LabelOut           = true}{}%
\tikzset{VertexStyle/.style = {draw,
                               shape          = \VertexShape,
                               color          = \VertexLineColor,
                               fill           = \VertexLightFillColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = \VertexOuterSep,
                               text           = \VertexTextColor,
                               minimum size   = \VertexSmallMinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width     = \EdgeLineWidth,
                                                \EdgeColor}}%
\tikzset{LabelStyle/.style={}}
%  Art
\or
\presetkeys [GR] {vertex} {NoLabel            = true}{}%
\tikzset{VertexStyle/.style = {shape          = \VertexShape,
                               ball color     = \VertexBallColor,
                               color          = \VertexLineColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = \VertexOuterSep,
                               minimum size   = \VertexSmallMinSize,
                               line width     = \VertexLineWidth}}%
\tikzset{EdgeStyle/.style   = {line width      = \EdgeLineWidth,
                                                 \EdgeArtColor}}
\tikzset{LabelStyle/.style  = {}}
% ShadeArt
\or
\presetkeys [GR] {vertex} {NoLabel            = true}{}%
\tikzset{VertexStyle/.style = {shape          = \VertexShape,
                               ball color     = \VertexBallColor,
                               inner sep      = \VertexInnerSep,
                               outer sep      = \VertexOuterSep,
                               minimum size   = \VertexSmallMinSize,
                               line width     = \VertexLineWidth}}
\tikzset{EdgeStyle/.style   = {line width      = \EdgeLineWidth,
                                                 \EdgeColor,
                               double          = \EdgeFillColor,
                               double distance = .5\EdgeDoubleDistance}}
\tikzset{LabelStyle/.style  = {}}
\fi%
}

\presetkeys    [GR] {init} {vstyle     = Normal,%
                            unit       = \GraphUnit}{} 

\newcommand*{\SetGraphUnit}[1]{\renewcommand{\GraphUnit}{#1}}%

\newcommand*{\GraphInit}[1][]{\setkeys[GR]{init}{#1}%
\edef\GraphUnit{\cmdGR@init@unit}%
}%
%<--------------------------------------------------------------------------->
%                             Colors
%<--------------------------------------------------------------------------->
\newcommand*{\SetGraphShadeColor}[3]{%
  \tikzset{VertexStyle/.append style = {ball color=#1}}
  \tikzset{EdgeStyle/.append style   = {color=#2,double=#3}}
}
\newcommand*{\SetGraphArtColor}[2]{%
  \tikzset{VertexStyle/.append style = {ball color=#1}}
  \tikzset{EdgeStyle/.append style   = {color=#2}}
}
\newcommand*{\SetGraphColor}[2]{%
  \tikzset{VertexStyle/.append style = {fill=#1}}
  \tikzset{EdgeStyle/.append style   = {color=#2}}
}
\newcommand*{\AddVertexColor}[2]{%
\begingroup
  \tikzset{VertexStyle/.append style  = {fill=#1}}
  \foreach \v in {#2}
    {\Vertex[Node,NoLabel]{\v}}
\endgroup
}
%<--------------------------------------------------------------------------->
\newcommand*{\SetVertexNoLabel}{%
    \presetkeys [GR] {vertex} {NoLabel = true}{}%
}
% add  RV
\newcommand*{\SetVertexLabel}{%
   \presetkeys [GR] {vertex} {NoLabel = false}{}%
}
%<--------------------------------------------------------------------------->
\newcommand*{\SetVertexLabelOut}{%
    \presetkeys [GR] {vertex} {LabelOut = true}{}%
}
\newcommand*{\SetVertexLabelIn}{%
    \presetkeys [GR] {vertex} {LabelOut = false}{}%
} 
\newcommand*{\SetVertexMath}{%
    \presetkeys [GR] {vertex} {Math = true}{}%
    \presetkeys [GR] {cl} {Math = true}{}%
}
\newcommand*{\SetVertexNoMath}{%
    \presetkeys [GR] {vertex} {Math = false}{}%
    \presetkeys [GR] {cl} {Math = false}{}%
} 
%<--------------------------------------------------------------------------->
%                          Init    SetUpVertex
%<--------------------------------------------------------------------------->
\define@cmdkey  [GR] {SUV} {Lpos}{}
\define@cmdkey  [GR] {SUV} {Ldist}{}
\define@cmdkey  [GR] {SUV} {Style}{}
\define@cmdkey  [GR] {SUV} {MinSize}{}
\define@cmdkey  [GR] {SUV} {LineWidth}{}
\define@cmdkey  [GR] {SUV} {TextColor}{}
\define@cmdkey  [GR] {SUV} {LineColor}{}
\define@cmdkey  [GR] {SUV} {FillColor}{}
\define@cmdkey  [GR] {SUV} {InnerSep}{}
\define@cmdkey  [GR] {SUV} {OuterSep}{}
\define@cmdkey  [GR] {SUV} {Unit}{}
\define@boolkey [GR] {SUV} {NoLabel} [true]{}
\define@boolkey [GR] {SUV} {LabelOut}[true]{}
\define@boolkey [GR] {SUV} {Math}[true]{}
\presetkeys     [GR] {SUV} {Ldist     = 0cm,
                            Lpos      = 0,
                            Style     = {},
                            LabelOut  = false,
                            NoLabel   = false,
                            Math      = false,
                            Unit      = \GraphUnit,
                            MinSize   = \VertexInterMinSize,
                            TextColor = \VertexTextColor,
                            LineColor = \VertexLineColor,
                            FillColor = \VertexLightFillColor,
                            LineWidth = \VertexLineWidth,
                            InnerSep  = \VertexInnerSep,
                            OuterSep  = \VertexOuterSep}{}
%<--------------------------------------------------------------------------->
%                             SetUpVertex
%<--------------------------------------------------------------------------->
\newcommand*{\SetUpVertex}[1][]{\GR@SetUpVertex[#1]}%
\def\GR@SetUpVertex[#1]{%
\setkeys[GR]{SUV}{#1}%
\presetkeys     [GR] {vertex} {Lpos     = \cmdGR@SUV@Lpos,
                               Ldist    = \cmdGR@SUV@Ldist,
                               style    = \cmdGR@SUV@Style,
                               unit     = \cmdGR@SUV@Unit}{}%
\tikzset{VertexStyle/.append style = {inner sep      = \cmdGR@SUV@InnerSep,
                                      outer sep      = \cmdGR@SUV@OuterSep,
                                      minimum size   = \cmdGR@SUV@MinSize,
                                      text           = \cmdGR@SUV@TextColor,
                                      color          = \cmdGR@SUV@LineColor,
                                      fill           = \cmdGR@SUV@FillColor,
                                      line width     = \cmdGR@SUV@LineWidth}}
\ifGR@SUV@NoLabel%
    \presetkeys [GR] {vertex} {NoLabel  = true}{}%
\fi%
\ifGR@SUV@LabelOut%
    \presetkeys [GR] {vertex} {LabelOut = true}{}%
\fi%
\ifGR@SUV@Math%
    \presetkeys [GR] {vertex} {Math = true}{}%
\fi%
}
%<--------------------------------------------------------------------------->
%                           Init Vertex
%<--------------------------------------------------------------------------->
\define@boolkey [GR] {vertex} {empty}[true]{}
\define@cmdkey  [GR] {vertex} {unit}{}
\define@cmdkey  [GR] {vertex} {x}{}
\define@cmdkey  [GR] {vertex} {y}{}
\define@cmdkey  [GR] {vertex} {a}{}
\define@cmdkey  [GR] {vertex} {d}{}
\define@boolkey [GR] {vertex} {Node}[true]{}
\define@cmdkey  [GR] {vertex} {dir}{}
\define@cmdkey  [GR] {vertex} {style}{}
\define@cmdkey  [GR] {vertex} {position}{}
\define@cmdkey  [GR] {vertex} {L}{}
\define@cmdkey  [GR] {vertex} {Lpos}{}
\define@cmdkey  [GR] {vertex} {Ldist}{}
\define@boolkey [GR] {vertex} {NoLabel}[true]{}
\define@boolkey [GR] {vertex} {Math}[true]{}
\define@boolkey [GR] {vertex} {LabelOut}[true]{}
\presetkeys     [GR] {vertex} {Node      = false,
                               NoLabel   = false,
                               LabelOut  = false,
                               empty     = false,
                               Math      = false,
                               x         = {},
                               y         = {},
                               a         = {},
                               d         = {},
                               unit      = \GraphUnit,
                               dir       = \EA,
                               position  = {},
                               style     = {},
                               L         = {},
                               Ldist     = 0cm,
                               Lpos      = 0}{}
%<--------------------------------------------------------------------------->
%                                  Vertex
%<--------------------------------------------------------------------------->
\newcommand*{\Vertex}[1][]{\@vertex[#1]}%
\def\@vertex[#1]#2{%
    \setkeys[GR]{vertex}{#1}%
    \@@vertex{#2}%
}
% coord rect todo coord polar and pos relative
\def\@@vertex#1{%
         \def\nstyle{VertexStyle}
%<--------------------------------------------------------------------------->
\ifGR@vertex@Node%
   \pgfextractx{\pgf@x}{\pgfpointanchor{#1}{center}}
   \pgfextracty{\pgf@y}{\pgfpointanchor{#1}{center}}
   \edef\cmdGR@vertex@x{\pgf@x}
   \edef\cmdGR@vertex@y{\pgf@y}
\fi%
%<--------------------------------------------------------------------------->
\ifGR@vertex@empty%
   \begin{scope}
      \ifthenelse{\not\equal{\cmdGR@vertex@x}{}}{%
           \protected@edef\@tempa{%
               \noexpand\node[inner sep = 0pt](#1)%
                  at (\cmdGR@vertex@x,\cmdGR@vertex@y){}}%
           \@tempa;}{%
       \ifthenelse{\not\equal{\cmdGR@vertex@d}{}}{%
           \protected@edef\@tempa{%
               \noexpand\node[inner sep = 0pt](#1)%
                  at (\cmdGR@vertex@a:\cmdGR@vertex@d){}}%
           \@tempa;}{%
           \protected@edef\@tempa{%
               \noexpand \node[inner sep = 0pt](#1)%
                  [\cmdGR@vertex@position]{}}%
           \@tempa;}}%
    \end{scope}
\else
 \begin{scope}[label distance = \cmdGR@vertex@Ldist]
  \ifGR@vertex@NoLabel
       \def\vertex@Label{}%
       \def\cmdGR@vertex@L{}%
       \def\vertex@Name{}
  \else%
     \ifGR@vertex@Math
     \ifthenelse{\equal{\cmdGR@vertex@L}{}}{%
       \def\vertex@Name{$#1$}}{\def\vertex@Name{$\cmdGR@vertex@L$}}
    \else
       \ifthenelse{\equal{\cmdGR@vertex@L}{}}{%
       \def\vertex@Name{#1}}{\def\vertex@Name{\cmdGR@vertex@L}}
    \fi%
      \ifGR@vertex@LabelOut%
        \def\nstyle{VertexStyle,%
                    label={[text = \cmdGR@SVN@TextColor,\cmdGR@vertex@style]%
                    \cmdGR@vertex@Lpos:\vertex@Name}}
        \def\vertex@Label{}
      \else%
      \def\vertex@Label{\vertex@Name}
      \fi
  \fi
%<--------------------------------------------------------------------------->
  \ifthenelse{\not\equal{\cmdGR@vertex@x}{}}{%
    \protected@edef\@tempa{%
      \noexpand\node[outer sep=0pt,\cmdGR@vertex@style,\nstyle](#1)
                 at (\cmdGR@vertex@x,\cmdGR@vertex@y){%
      \noexpand\vertex@Label}}%
      \@tempa;%
      }{%
      \ifthenelse{\not\equal{\cmdGR@vertex@d}{}}{%
        \protected@edef\@tempa{%
        \noexpand\node[outer sep=0pt,\cmdGR@vertex@style,\nstyle](#1)
                       at (\cmdGR@vertex@a:\cmdGR@vertex@d){%
        \noexpand\vertex@Label}}%
        \@tempa;%
      }{%
        \protected@edef\@tempa{%
        \noexpand\node[outer sep=0pt,\cmdGR@vertex@style,\nstyle](#1)%
                      [\cmdGR@vertex@position]{%
        \noexpand\vertex@Label}}%
       \@tempa;}}%
  \end{scope}
\fi%
}
%<--------------------------------------------------------------------------->
%                          End of  Vertex
%<--------------------------------------------------------------------------->
%                          EA east of #2
%<--------------------------------------------------------------------------->
\newcommand*{\EA}[1][]{\@droite[#1]}%
\def\@droite[#1](#2)#3{%
\begingroup% 
  \setkeys[GR]{vertex}{#1}% 
  \path (#2)--++(\cmdGR@vertex@unit,0) coordinate (#3);
  \Vertex[#1,Node]{#3}
\endgroup%
}%
%<--------------------------------------------------------------------------->
%                         WE west of #2
%<--------------------------------------------------------------------------->
\newcommand*{\WE}[1][]{\@gauche[#1]}%
\def\@gauche[#1](#2)#3{% 
\begingroup% 
  \setkeys[GR]{vertex}{#1}%
  \path (#2)--++(-\cmdGR@vertex@unit,0) coordinate (#3);
  \Vertex[#1,Node]{#3}
  \endgroup%
}
%<--------------------------------------------------------------------------->
%                       NO north of #2
%<--------------------------------------------------------------------------->
\newcommand*{\NO}[1][]{\@haut[#1]}%
\def\@haut[#1](#2)#3{% 
\begingroup% 
  \setkeys[GR]{vertex}{#1}%
  \path (#2)--++(0,\cmdGR@vertex@unit) coordinate (#3);
  \Vertex[#1,Node]{#3} 
\endgroup%
}
%<--------------------------------------------------------------------------->
%                        SO south of #2
%<--------------------------------------------------------------------------->
\newcommand*{\SO}[1][]{\@bas[#1]}%
\def\@bas[#1](#2)#3{% 
\begingroup% 
  \setkeys[GR]{vertex}{#1}%
  \path (#2)--++(0,-\cmdGR@vertex@unit) coordinate (#3);  
  \Vertex[#1,Node]{#3} 
\endgroup%
}
%<--------------------------------------------------------------------------->
%                     NOEA north east of #2
%<--------------------------------------------------------------------------->
\newcommand*{\NOEA}[1][]{\@hautdroite[#1]}%
\def\@hautdroite[#1](#2)#3{% 
\begingroup% 
  \setkeys[GR]{vertex}{#1}%
  \path (#2)--++(\cmdGR@vertex@unit,\cmdGR@vertex@unit) coordinate (#3); 
  \Vertex[#1,Node]{#3} 
\endgroup%
}

%<--------------------------------------------------------------------------->
%                      NOWE  north west of #2
%<--------------------------------------------------------------------------->
\newcommand*{\NOWE}[1][]{\@hautgauche[#1]}%
\def\@hautgauche[#1](#2)#3{% 
\begingroup% 
  \setkeys[GR]{vertex}{#1}%
  \path (#2)--++(-\cmdGR@vertex@unit,\cmdGR@vertex@unit) coordinate (#3);
  \Vertex[#1,Node]{#3} 
\endgroup%
}
%<--------------------------------------------------------------------------->
%                     SOEA south east of #2
%<--------------------------------------------------------------------------->
\newcommand*{\SOEA}[1][]{\@basdroite[#1]}%
\def\@basdroite[#1](#2)#3{% 
\begingroup% 
  \setkeys[GR]{vertex}{#1}%
  \path (#2)--++(\cmdGR@vertex@unit,-\cmdGR@vertex@unit) coordinate (#3);
  \Vertex[#1,Node]{#3} 
\endgroup%
}
%<--------------------------------------------------------------------------->
%                    SOWE south west of #2
%<--------------------------------------------------------------------------->
\newcommand*{\SOWE}[1][]{\@basgauche[#1]}%
\def\@basgauche[#1](#2)#3{% 
\begingroup% 
  \setkeys[GR]{vertex}{#1}%
  \path (#2)--++(-\cmdGR@vertex@unit,-\cmdGR@vertex@unit) coordinate (#3);
  \Vertex[#1,Node]{#3} 
\endgroup%
}
    
%<--------------------------------------------------------------------------->
%                               Vertices
%<--------------------------------------------------------------------------->
\newcommand*{\Vertices}[1][]{\Vertices@NoStar[#1]}%
\def\Vertices@NoStar[#1]#2#3{%
\setkeys[GR]{vertex}{#1}%
\begingroup%
   \setcounter{tkz@gr@p}{0}
   \@for\liste:=#3\do{%
     \stepcounter{tkz@gr@p}%
     \global\expandafter\let\csname label@\alph{tkz@gr@p}\endcsname\liste}
    \ifthenelse{\equal{#2}{line}}{%
       \setcounter{tkz@gr@p}{0}
   \foreach \fin in {#3}{%
       \ifthenelse{\value{tkz@gr@p}=0}{%
       \global\let\deb\fin
       \Vertex[#1]{\fin}
       \stepcounter{tkz@gr@p}
       }{%
       \cmdGR@vertex@dir[#1,x={},y={},a={},d={},Node=false](\deb){\fin}
       \global\let\deb\fin
        }
     }%       
    }{ 
    \ifthenelse{\equal{#2}{square}}{%
     \begin{scope}[rotate=45]
       \Vertex[#1,Lpos=-135]{\label@a}
        \EA[#1,Lpos=-45,x={},y={},Node=false](\label@a){\label@b}
        \NO[#1,Lpos=45, x={},y={},Node=false](\label@b){\label@c}
        \WE[#1,Lpos=135,x={},y={},Node=false](\label@c){\label@d}  
     \end{scope}
}{%
   \ifthenelse{\equal{#2}{tr1}}{%
     \Vertex[#1]{\label@a}
     \EA[#1,x={},y={},Node=false](\label@a){\label@b}
     \NO[#1,x={},y={},Node=false](\label@b){\label@c}}{%
   \ifthenelse{\equal{#2}{tr2}}{%
     \Vertex[#1]{\label@a}
     \NO[#1,x={},y={},Node=false](\label@a){\label@b}
     \EA[#1,x={},y={},Node=false](\label@b){\label@c}}{%
   \ifthenelse{\equal{#2}{tr3}}{%
     \Vertex[#1]{\label@a}
     \NO[#1,x={},y={},Node=false](\label@a){\label@b}
     \WE[#1,x={},y={},Node=false](\label@b){\label@c}}{%
   \ifthenelse{\equal{#2}{tr4}}{%
     \Vertex[#1]{\label@a}
     \WE[#1,x={},y={},Node=false](\label@a){\label@b}
     \NO[#1,x={},y={},Node=false](\label@b){\label@c}}{%
   \ifthenelse{\equal{#2}{circle}}{%
    \pgfmathdivide{360}{\value{tkz@gr@p}}%
    \global\let\gr@angle\pgfmathresult%
    \setcounter{tkz@gr@p}{0}
    \foreach \lab in {#3}{%
      \pgfmathmultiply{\gr@angle}{\thetkz@gr@p}%
      \let\gr@newangle\pgfmathresult%
      \pgfmathadd{\cmdGR@vertex@Lpos}{\gr@newangle}
      \let\gr@posangle\pgfmathresult%
        \Vertex[#1,
              a    = \gr@newangle,
              d    = \cmdGR@vertex@unit,
              Lpos = \gr@posangle]{\lab}
          \stepcounter{tkz@gr@p}%
      }%
     }{}%
  }}}}}}%
\endgroup%
}
%<--------------------------------------------------------------------------->
%                          Edge style
%<--------------------------------------------------------------------------->
\tikzset{LabelStyle/.style={}}% add 03/04/2009
\tikzset{EdgeStyle/.style={}}
%<--------------------------------------------------------------------------->
%                          Init    SetUpEdge
%<--------------------------------------------------------------------------->
\define@cmdkey  [GR] {SUE} {color}{}
\define@cmdkey  [GR] {SUE} {label}{}
\define@cmdkey  [GR] {SUE} {labelstyle}{}
\define@cmdkey  [GR] {SUE} {labeltext}{}
\define@cmdkey  [GR] {SUE} {labelcolor}{}
\define@cmdkey  [GR] {SUE} {style}{}
\define@cmdkey  [GR] {SUE} {lw}{}
\presetkeys     [GR] {SUE} {color        = \EdgeColor,
                            lw           = \EdgeLineWidth,
                            label        = {},
                            labeltext    = \LabelTextColor,
                            labelcolor   = \LabelFillColor,
                            labelstyle   = {},
                            style        = {}}{}
%<--------------------------------------------------------------------------->
%                             SetUpEdge
%<--------------------------------------------------------------------------->
\newcommand*{\SetUpEdge}[1][]{\@SetUpEdge[#1]}%
\def\@SetUpEdge[#1]{%
\setkeys    [GR] {SUE} {#1}%
\presetkeys [GR] {edge} {color        = \cmdGR@SUE@color,
                         lw           = \cmdGR@SUE@lw,
                         label        = \cmdGR@SUE@label,
                         labeltext    = \cmdGR@SUE@labeltext,
                         labelcolor   = \cmdGR@SUE@labelcolor,
                         labelstyle   = \cmdGR@SUE@labelstyle,
                         style        = \cmdGR@SUE@style}{}
\tikzset{LabelStyle/.style={}}
\tikzset{EdgeStyle/.style={}}}
\newcommand*{\DisableEdgeStyle}{\tikzset{EdgeStyle/.style={}}}
%<--------------------------------------------------------------------------->
%                              Init Edge 
%<--------------------------------------------------------------------------->
\define@cmdkey [GR] {edge} {color}{}
\define@cmdkey [GR] {edge} {lw}{} 
\define@cmdkey [GR] {edge} {double}{}
\define@cmdkey [GR] {edge} {incolor}{}
\define@cmdkey [GR] {edge} {dd}{}
\define@cmdkey [GR] {edge} {style}{} 
\define@cmdkey [GR] {edge} {label}{}
\define@cmdkey [GR] {edge} {labeltext}{}
\define@cmdkey [GR] {edge} {labelcolor}{}
\define@cmdkey [GR] {edge} {labelstyle}{}
\define@boolkey[GR] {edge} {local}[true]{}
\presetkeys    [GR] {edge} {style      = {pos=.5},
                            lw         = \EdgeLineWidth,  
                            label      = {},
                            labeltext  = \LabelTextColor,
                            labelcolor = \LabelFillColor,
                            labelstyle = {},
                            local      = false,
                            double     = {},
                            dd         = \EdgeDoubleDistance,
                            incolor    = \EdgeFillColor,
                            color      = \EdgeColor}{} 
%<--------------------------------------------------------------------------->
%                               Edge 
%<--------------------------------------------------------------------------->
\newcommand*{\Edge}[1][]{\@edge[#1]}%
\def\@edge[#1](#2)(#3){%
\setkeys[GR]{edge}{#1}%
 \begingroup%
\ifthenelse{\equal{\cmdGR@edge@double}{}}{%
\tikzset{LocalEdgeStyle/.style={color = \cmdGR@edge@color,
                                line width = \cmdGR@edge@lw}}}{%
\tikzset{LocalEdgeStyle/.style={line width = \cmdGR@edge@dd,
                                color = \cmdGR@edge@double,
                                double distance = \cmdGR@edge@lw,
                                double  = \cmdGR@edge@color}}}%
\ifGR@edge@local%
      \tikzset{EdgeStyle/.style={}}%
      \fi
   \ifthenelse{\equal{\cmdGR@edge@label}{}}{%
     \protected@edef\@tempa{%
     \noexpand   \draw[LocalEdgeStyle,\cmdGR@edge@style,EdgeStyle]}%
                 \@tempa (#2) to (#3)}{%
     \protected@edef\@tempa{%
     \noexpand   \draw[LocalEdgeStyle,\cmdGR@edge@style,EdgeStyle] (#2) to%
    node[fill = \cmdGR@edge@labelcolor,
         text = \cmdGR@edge@labeltext,
         \cmdGR@edge@labelstyle,LabelStyle]}\@tempa
   {\cmdGR@edge@label} (#3)}%
   ;
\endgroup%
}%
%<--------------------------------------------------------------------------->
%                               Edges
%<--------------------------------------------------------------------------->
\newcommand*{\Edges}[1][]{\@edges[#1]}%
\def\@edges[#1](#2){%
\setkeys[GR]{edge}{#1}%
 \begingroup%
   \setcounter{tkz@gr@p}{0}
   \foreach \fin in {#2}{%
       \ifthenelse{\value{tkz@gr@p}=0}{%
       \global\let\deb\fin
       \stepcounter{tkz@gr@p}}{%
       \Edge[#1](\deb)(\fin)
       \global\let\deb\fin
       }%
   }
 \endgroup%
}%
%<--------------------------------------------------------------------------->
%                          Init  loop 
%<--------------------------------------------------------------------------->
\define@choicekey*[GR]{loop}{dir}[\val\nr]{WE,EA,NO,SO,NOWE,NOEA,SOWE,SOEA}{%
\ifcase\nr\relax
\tikzset{LoopStyle/.style = {in=225, out=135, distance=\cmdGR@loop@dist}}%
\or
\tikzset{LoopStyle/.style = {in= 45, out=-45, distance=\cmdGR@loop@dist}}%
\or
\tikzset{LoopStyle/.style = {in=135, out= 45, distance=\cmdGR@loop@dist}}%
\or
\tikzset{LoopStyle/.style = {in=-45, out=-135, distance=\cmdGR@loop@dist}}%
\or
\tikzset{LoopStyle/.style = {in=180, out=90, distance=\cmdGR@loop@dist}}%
\or
\tikzset{LoopStyle/.style = {in=90, out=0, distance=\cmdGR@loop@dist}}%
\or
\tikzset{LoopStyle/.style = {in=-90, out=-180, distance=\cmdGR@loop@dist}}%
\or
\tikzset{LoopStyle/.style = {in=0, out=-90, distance=\cmdGR@loop@dist}}%
\fi%
}
\define@cmdkey [GR] {loop} {color}{}
\define@cmdkey [GR] {loop} {label}{}
\define@cmdkey [GR] {loop} {labelstyle}{}
\define@cmdkey [GR] {loop} {style}{}
\define@cmdkey [GR] {loop} {dist}{}
\presetkeys    [GR] {loop} {style      = {pre,thick},%`
                            label      = {},% 
                            labelstyle = {},%
                            color      = \tkz@suc@txt,%
                            dist       = 4cm,%
                            dir        = WE}{} 
%<--------------------------------------------------------------------------->
%                                loop 
%<--------------------------------------------------------------------------->
\newcommand*{\grLoop}[1][]{\tkzGR@loop[#1]}%
\def\tkzGR@loop[#1](#2){%
\setkeys[GR]{loop}{#1}%
\protected@edef\@tempa{%
\noexpand \draw[\cmdGR@loop@color] (#2)%
  edge [EdgeStyle,LoopStyle,\cmdGR@loop@style]%
  node [LabelStyle,\cmdGR@loop@labelstyle]%
  {\cmdGR@loop@label} (#2)}\@tempa;%
}%
%<--------------------------------------------------------------------------->
%                    Init   Graphes probabilistes 
%<--------------------------------------------------------------------------->
\define@cmdkey [GR] {grpb} {unit}{}
\define@cmdkey [GR] {grpb} {LposA}{}
\define@cmdkey [GR] {grpb} {LposB}{}
\define@cmdkey [GR] {grpb} {Ldist}{}
\define@cmdkey [GR] {grpb} {LoopDist}{}
\presetkeys    [GR] {grpb} {LposA    = 180,%
                            LposB    = 0,%
                            Ldist    = 0cm,%
                            LoopDist = 4cm,
                            unit     = 4}{} 
%<--------------------------------------------------------------------------->
%                       Graphes probabilistes 
%<--------------------------------------------------------------------------->
\newcommand*{\grProb}[7][]{%
\setkeys[GR]{grpb}{#1}%
\tikzset{LabelStyle/.append style ={pos=.5}}
\Vertex[Lpos=\cmdGR@grpb@LposA,Ldist=\cmdGR@grpb@Ldist,L=#2]{grA}
\EA[unit=\cmdGR@grpb@unit,Lpos=\cmdGR@grpb@LposB,
    Ldist=\cmdGR@grpb@Ldist,L=#3](grA){grB}
\Edge[style={post,bend left=60},label={$#4$},labelstyle={above}](grA)(grB)
\Edge[style={post,bend left=60},label={$#5$},labelstyle={below}](grB)(grA)
\grLoop[dist=\cmdGR@grpb@LoopDist,dir=WE,label={$#6$},labelstyle={left}](grA)
\grLoop[dist=\cmdGR@grpb@LoopDist,dir=EA,label={$#7$},labelstyle={right}](grB)
}%
\newcommand*{\grProbThree}[7][]{%
\setkeys[GR]{grpb}{#1}%
\begin{scope}[]
  \tikzset{LabelStyle/.append style ={pos=.5}}
  \Vertices[empty,unit=\cmdGR@grpb@unit]{circle}{grA,grB,grC}
   \Vertex[Node,Lpos=\cmdGR@grpb@LposA,Ldist=\cmdGR@grpb@Ldist,L=#2]{grA}
   \Vertex[Node,Lpos=\cmdGR@grpb@LposA,Ldist=\cmdGR@grpb@Ldist,L=#3]{grB}
   \Vertex[Node,Lpos=\cmdGR@grpb@LposA,Ldist=\cmdGR@grpb@Ldist,L=#4]{grC}
   \foreach \x/\y/\z in {#5} {%
   \grLoop[dist=\cmdGR@grpb@LoopDist,dir=EA,label={$\x$}](grA)
\Edge[style={post,bend right=20},label={$\y$}](grA)(grB)
\Edge[style={post,bend right=20},label={$\z$}](grA)(grC)}
\foreach \x/\y/\z in {#6} {%
   \grLoop[dist=\cmdGR@grpb@LoopDist,dir=NO,label={$\x$}](grB)
\Edge[style={post,bend right=20},label={$\y$}](grB)(grA)
\Edge[style={post,bend right=20},label={$\z$}](grB)(grC)}
   \foreach \x/\y/\z in {#7} {%
   \grLoop[dist=\cmdGR@grpb@LoopDist,dir=SO,label={$\x$}](grC)
 \Edge[style={post,bend right=20},label={$\y$}](grC)(grA)
 \Edge[style={post,bend right=20},label={$\z$}](grC)(grB)}
\end{scope}
}
%<--------------------------------------------------------------------------->
%                      End   Graphes probabilistes 
%<--------------------------------------------------------------------------->
\let\Loop\grLoop
\newcommand{\SetVertexLabeledSmall}{%
\SetVertexLabel%
\tikzset{VertexStyle/.style = {draw,   
                               shape           = circle,
                               inner sep       = 1pt,
                               minimum size    = 10pt}}
\tikzset{EdgeStyle/.style  = {double           = \tkz@suc@txt,
                              double distance  = 1pt,
                              color            = \tkz@suc@bkc,
                              line width       = 0.7pt}}
}
\newcommand{\SetVertexNotLabeledSmall}{%
  \tikzset{EdgeStyle/.style = {double = \tkz@suc@txt,
                               double distance = 1pt,
                               color = \tkz@suc@bkc,
                               line width = 0.7pt}}
  \SetVertexNoLabel
  \SetVertexSimple[MinSize=6pt,FillColor=gray]
  \renewcommand*{\VertexLineWidth}{0pt}
}%

\newcommand{\SetVertexForPresentation}[3]{%
  \GraphInit[vstyle=Shade]
  \SetVertexNoLabel
  \renewcommand*{\VertexBigMinSize}{12pt}%
  \renewcommand*{\EdgeDoubleDistance}{2pt}%
  \renewcommand*{\EdgeLineWidth}{0.7pt}%
  \SetGraphShadeColor{#1}{#2}{#3}
}%

\newcommand{\setxyzvec}[1][20]{%
  \pgfmathsetmacro{\xone}{cos(180+#1)}%
  \pgfmathsetmacro{\yone}{sin(180+#1)}%
  \pgfmathsetmacro{\xtwo}{cos(360-#1)}%
  \pgfmathsetmacro{\ytwo}{sin(360-#1)}%
  \pgfsetxvec{\pgfpoint{\xone cm}{\yone cm}}%
  \pgfsetyvec{\pgfpoint{\xtwo cm}{\ytwo cm}}%
  \pgfsetzvec{\pgfpoint{0cm}{1cm}}%
}
\endinput

