input mp-solid %13" figureespace(-10u,-10u,10u,10u);% Initialisation(200,20,20,15); outcolor:=0.5[ciel,white]; draw Tuben("(0.5*t*sin(0.707)*cos(t),0.5*sin(0.707)*t*sin(t),-0.5*t*cos(0.707))","(0.5*sin(0.707)*(cos(t)-t*sin(t)),0.5*sin(0.707)*(sin(t)+t*cos(t)),-0.5*sin(0.707))",0.4,-25.4,254,0.2); finespace; end