vertices = dimension1:72 dimension2:72
u = from (-PI*0.499) to (-PI*0.01) dimension1
v = from 0 to (2*PI) dimension2
a = rand2(1, 5)
b = rand2(1, 5)
c = rand2(1, 5)
x = a*sinh(u)*cos(v)
z = b*sinh(u)*sin(v)
y = -c*cosh(u)
