%% PhS %% %% échelle et étendue de l'image 50 setxunit -0.5 4.5 setxrange -0.5 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 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 sqrt 2 mul -1 add neg 3.2 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 2.5 setlinewidth coul1 continu 0.7 4 settrange {xdet} {ydet} courbeparam [0.69 0.7 ydet 0.7 dup ydet] (]-) ligne vert 1 setlinewidth pointilles [0.7 0 0.7 3.5] (-) ligne rouge [-0.5 3.2 5 3.2] (-) ligne %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% texte %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% setTimesItalic vert \$a\$ 0.7 -0.3 [2.5 dup] cctexlabel