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

vertices = D1:100 D2:100

u = from -2 to 2 D1
v = from -2 to 2 D2

a = 0.1

x = u
z = v
y = pow_sign(1 - u*u - pow(v, 5), 1/3)

x = x
y = y
z = z

