input mp-solid

figureespace(-10u,-10u,10u,10u);
Initialisation(300,70,30,10);
incolor:=0.5[jaune,white];
outcolor:=0.8[violet,white];
arcenciel:=true;
draw SurfZ("if (X=0) and (Y=0):10 else:10*sin((X++Y))/(X++Y) fi",8,0.25,48);
finespace;

end