29/08/2020
Working with Parametric equations:
Dr = re - ri
mm = Sin(t) * ri
x = Int(Dr * Cos(t) + rho * (Sin(0.1 * mm) + 2) * Cos(Dr / re * t))
y = Int(Dr * Sin(t) - rho * (5 * Sin(2 * t) + 2) * Sin(Dr / re * t))