%%d'après http://mapage.noos.fr/r.ferreol/atelecharger/textes/relief/courbes%20en%20relief.html input mp-solid arcenciel:=true; %2" figureespace(-10u,-10u,10u,10u); Initialisation(1000,45,-10,55); draw Tuben("(3*cosd(t),cosd(2*t),3*sind(t))","(-3*sind(t),-2*sind(2*t),3*cosd(t))",0.15,0,102,3.6); finespace; end