#http://www.mathcurve.com/courbes3d/noeuds/noeudenhuit.shtml
vertices = 12000

t = from 0 to (20*PI)

x = 3*cos(t) + 5*cos(3*t)
y = 3*sin(t) + 5*sin(3*t)
z = sin(5*t/2)*sin(3*t) + sin(4*t) - sin(6*t)

r = 4;
x = x*r
y = y*r
z = z*r