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

vertices = D1:100 D2:100

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

x = v*cos(u) - 0.5*v*v*cos(2*u)
z = -v*sin(u) - 0.5*v*v*sin(2*u)
y = 4/3*pow(v, 3/2)*cos(3/2*u)
