EllipseCollider2D.getPoints C# (CSharp) Method

    public Vector2[] getPoints(Vector2 off)
    {
        List<Vector2> points = new List<Vector2>();

        origin = transform.localPosition;
        center = origin + off;
        
        float ang = 0;
        float o = rotation * Mathf.Deg2Rad;

        for (int i = 0; i <= smoothness; i++)
        {
            float a = ang * Mathf.Deg2Rad;

            // fan shuriken
            //float radius;
            //float radX = 90 - (Mathf.Abs(ang) % 90);
            //float radY = 90 - radX;
            //radius = ((radiusX * radX / 90f) + (radiusY * radY / 90f)) / 2f;
            //float x = center.x + radius * Mathf.Cos(a);
            //float y = center.y + radius * Mathf.Sin(a);

            // https://www.uwgb.edu/dutchs/Geometry/HTMLCanvas/ObliqueEllipses5a.HTM
            float x = center.x + radiusX * Mathf.Cos(a) * Mathf.Cos(o) - radiusY * Mathf.Sin(a) * Mathf.Sin(o);
            float y = center.y - radiusX * Mathf.Cos(a) * Mathf.Sin(o) - radiusY * Mathf.Sin(a) * Mathf.Cos(o);

            points.Add(new Vector2(x, y));
            ang += 360f/smoothness;
        }

        return points.ToArray();
    }
}

    void OnEnable()
    {
        ec = (EllipseCollider2D)target;

        polyCollider = ec.GetComponent <PolygonCollider2D>();
        if (polyCollider == null)
        {
            polyCollider = ec.gameObject.AddComponent <PolygonCollider2D>();
        }
        polyCollider.points = ec.getPoints();
    }