%% PhS gh
%% 

%% Èchelle et Ètendue de l'image
60 setxunit
-1 6  setxrange
-1 4  setyrange


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%  DANGER !! Il ne faut pas utiliser de variables
%%  DANGER !! qui commence par les lettres :
%%  DANGER !! xmin, xmax, ymin et ymax...
%%  DANGER !! Utiliser x_min, y_min...
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%




%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% procÈdures
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


%% on donne ici x(t)
/xdet {
1 dict begin
	/t exch def
	t
end
	} def

%% on donne ici y(t)
/ydet {
1 dict begin
	/t exch def
	t dup mul dup mul -0.05 mul t dup mul 0.4 mul add t -0.3 mul add 1 add
end
	} def


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% dÈfinitions des couleurs
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

/coul1 {120 255 div 70 255 div 9 255 div setrgbcolor} def



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% tracÈs
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%% tracÈ des axes et du point Origine
1 setlinewidth
15 setfontsize
noir
continu
traceaxes
marks
tracerepere



2 setlinewidth
coul1
continu
-2 2.5 settrange
{xdet 2.5 add} {ydet} courbeparam


1 setlinewidth
vert
pointilles
-2 2.5 settrange
{xdet 2.5 add} {ydet 0.4 add} courbeparam
{xdet 2.5 add} {ydet -0.4 add} courbeparam

bleu
continu
[0.5 2.6 0.8 2.6] (-) ligne
[0.8 2.4 1.1 2.4] (-) ligne
[1.1 2.1 1.4 2.1] (-) ligne
[1.4 1.8 1.7 1.8] (-) ligne
[1.7 1.55 2.1 1.55] (-) ligne
[2.1 1.25 3.5 1.25] (-) ligne
[3.5 1.4 4.7 1.4] (-) ligne
[4.7 1.15 5 1.15] (-) ligne

rouge
[0.5 2.05 1 2.05]  (-) ligne
[1 1.75 1.35 1.75] (-) ligne
[1.35 1.4 1.7 1.4] (-) ligne
[1.7 1.15 2 1.15] (-) ligne
[2 0.9 4 0.9] (-) ligne
[4 1.05 4.7 1.05] (-) ligne
[4.7 0.75 5 0.75] (-) ligne


noir
continu
[0.5 0 0.5 -2 ydet 0.4 add] (-) ligne
[5 0 5 2.5 ydet 0.4 add] (-) ligne


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% texte
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
setTimesItalic