1.x=sin(u)*atan(u*1/2) y=log10(u*1/6) z=log10(u*1)-cos(u*10) 0 <=u<=2*pi rotacija oko y ose
1.x=sin(u)*atan(u*1/2) y=log10(u*1/6) z=log10(u*1)-cos(u*10) 0<=u<=2*pi 2. x=cos(v) y=sin(v)*cos(v) z=2 0<=v<=2*pi