Présentation de 014.jps

/syracuse/bbgraf/albums/coniques_03/014.jpg
%% PhS %% 50 setxunit -3.5 3.5 setxrange -3.5 3.5 setyrange %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% procÚdures %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% /bddroite { 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 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% definition d'une couleur %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% /coul1 {120 255 div 70 255 div 9 255 div setrgbcolor} def %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% definition des points %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% /a {1.5} def /c {2.2} def /b {c c mul a a mul sub sqrt} def /e {c a div} def /Kx {a e div} def /K {Kx neg 0} def /K+ {K 0 6 addv} def /K- {K 0 -6 addv} def /Kp {Kx 0} def /Kp+ {Kp 0 6 addv} def /Kp- {Kp 0 -6 addv} def /O {0 0} def /F {c neg 0} def /Fp {c 0} def /S1 {a neg 0} def /S2 {a 0} def /B {0 b} def /xdet {settvar t t mul b b mul div 1 add sqrt a mul} def /ydet {settvar t} def /Mx {b 0.6 mul xdet} def /My {b 0.6 mul ydet} def /M {Mx My} def /H {M Kp Kp+ orthoproj} def /bissec {F M Fp bissectrice} def /T {bissec Kp Kp+ interdroite} def /U {bissec M perp Kp Kp+ interdroite} def %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% traces %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 1.2 setlinewidth [O F Fp S1 S2 K Kp] points F Fp -0.5 1.5 bddroite b -2 mul b 2 mul settrange {xdet} {ydet} courbeparam b -2 mul b 2 mul settrange {xdet neg} {ydet} courbeparam vert [K+ K-] ligne [Kp+ Kp-] ligne 0.6 setlinewidth orange mixte a neg b neg a b -1 2 bddroite a b neg a neg b -1 2 bddroite noir [O 0 -6.5 addv O 0 6.5 addv] ligne %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% texte %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% setTimesItalic noir (O) O [1.5 dup] dltext (F) F [1.5 dup] dltext (F') Fp [1.5 dup] drtext <latex> $ S_1 $ </latex> S1 [1.5 dup] dltexlabel <latex> $ S_2 $ </latex> S2 [1.5 dup] drtexlabel vert (K) K [1.5 dup] drtext (K') Kp [1.5 dup] dltext <latex> $ \mathcal{D} $ </latex> K 0 -3 addv [1.5 dup] cltexlabel <latex> $ \mathcal{D}' $ </latex> Kp 0 -3 addv [1.5 dup] crtexlabel