%% PhS %% %% échelle et étendue de l'image 60 setxunit -3.5 3.5 setxrange -2.5 3.5 setyrange /xgauche -6 def %% c'est la limite gauche de l'image /xdroite 6 def %% c'est la limite droite de l'image /ybasse -4 def %% c'est la limite basse de l'image /yhaute 4 def %% c'est la limite haute de l'image %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% 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... %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% plages initiales pour les paramètres (peuvent être modifiées pour chaque fonctions tracées /x_min -5 def /x_max 5 def /t_min -9 def /t_max 9 def %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% procédures %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% 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 3 div t dup mul 2 mul sub t -0.2 mul add 1 add neg 0 max end } def %% dessine un bout de droite /bddroite { %% Ax Ay Bx By kg (=proportion vers A) kd (=prop vers B) 8 dict begin /kd exch def /kg exch def /By exch def /Bx exch def /B {Bx By} def /Ay exch def /Ax exch def /A {Ax Ay} def gsave [A A B vecteur kg mulv addv A A B vecteur kd mulv addv] ligne grestore end } def %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% définitions des couleurs %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% /coul1 {120 255 div 70 255 div 9 255 div setrgbcolor} def %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% tracés %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% tracé des axes et du point Origine 1 setlinewidth 15 setfontsize noir continu traceaxes marks tracerepere %% tracé du cercle noir 1 setlinewidth 2.5 setlinewidth coul1 continu -4 4 settrange {xdet} {ydet} courbeparam %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% texte %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% setTimesItalic coul1 $\mathcal{C}_{f^-}$ -2 2.8 [3 dup] cctexlabel