input mp-solid;

figureespace(-10u,-10u,10u,10u);
Initialisation(5,30,50,20);
draw Fonction("(sin(t),t/3,cos(t))",-2,25,0.01);
finespace;

figureespace(-10u,-10u,10u,10u);
Initialisation(5,30,50,50);
outcolor:=0.5[red,white];
draw Tube("(sin(t),t/3,cos(t))","(cos(t),1/3,-sin(t))","(-sin(t),0,-cos(t))",0.1,-2,200,0.1);
finespace;
end