#http://www.mathcurve.com/courbes2d/bouche/bouche.shtml
vertices = D1:100 D2:100
u = from 0 to (PI*2) D1
v = from 0 to PI D2
x = cos(u)*cos(v)
y = pow(sin(u), 3)*0.5
z = cos(u)*sin(v)
r = 10
x = x*r
y = y*r
z = z*r
