#http://www.mathcurve.com/surfaces/guimard/guimard.shtml
vertices = D1:50 D2:50

u = from 0 to 1 D1
v = from 0 to (PI*2) D2

a = rand_int2(1, 10)
b = rand_int2(1, 10)
c = rand_int2(1, 10)

x = ((1 - u)*a + u*b)*cos(v)
y = b*u*sin(v)
z = c*u*sin(v)*sin(v)
