#http://www.mathcurve.com/courbes2d/sextic/sexticrationnelle.shtml
vertices = 1000

t = from 0 to (2*PI)
a = 10

x = pow(cos(t), 3)/(2*pow(cos(t), 3) - 2*cos(t) + 1)
y = sin(2*t)*pow(sin(t/2), 2)/(2*pow(cos(t), 3) - 2*cos(t) + 1)

x = x*a
y = y*a
