%k3dsurf snail

input mp-solid

%1''
figureespace(-10u,-10u,10u,10u);
Initialisation(1000,-30,-10,75);
incolor:=gris;
arcenciel:=true;
draw Sparam("(u*cos(v)*sin(u),u*cos(u)*cos(v),-u*sin(v))",1.92,0,-0.08,-pi/2,pi/2-0.2513,0.2513);
finespace;
end