%% PhS %% %% échelle et étendue de l'image 60 setxunit -1.5 6 setxrange -1.5 3 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 10 4 point %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% 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 1 add div t abs sqrt mul 0.5 sub 1.5 mul t 0.1 mul add 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 2 setlinewidth coul1 continu -2 6 settrange {xdet} {ydet} courbeparam 1 setlinewidth noir [1.5 dup ydet 4.4 dup ydet] (-) ligne vert pointilles [1.5 0 1.5 dup ydet ] (-) ligne [4.4 0 4.4 dup ydet ] (-) ligne noir [1.5 dup ydet 4.4 dup ydet] points %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% texte %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% setTimesItalic noir $\mathcal{C}_f$ 1 1.5 [2.5 dup] cctexlabel vert $x$ 1.5 -0.25 [2 dup] cctexlabel vert $x'$ 4.4 -0.2 [2 dup] cctexlabel