#http://mathworld.wolfram.com/HennebergsMinimalSurface.html

vertices = D1:100 D2:100

u = from 0 to (PI/2) D1
v = from 0 to (PI*2) D2

x = 2*sinh(u)*cos(v) - 2/3*sinh(3*u)*cos(3*v)
y = 2*cosh(2*u)*cos(2*v)
z = 2*sinh(u)*sin(v) + 2/3*sinh(3*u)*sin(3*v)

