#http://www.mathcurve.com/surfaces/cylindrederevolution/cylindrederevolution.shtml
vertices = D1:100 D2:100
u = from 0 to (2*PI) D1
v = from 0 to 10 D2
a = rand2(1, 10)
x = a*cos(u)
z = a*sin(u)
y = v
