vertices = D1:360 D2:100

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

r = pow(sin(u), 3) + pow(cos(u), 3)
x = r*sin(u) - 0.3
y = r*cos(u) - 0.3

a = 10
b = 2

x = x*a*cos(v)
y = y*a*cos(v)
z = b*sin(v)
