QBezier.integrateF C# (CSharp) Method

    private float integrateF(float t)
    {
        float BT = B + t;
        float BTS = Mathf.Sqrt(BT * BT + C);
        return Mathf.Sqrt(XY) * (BTS * BT + C * Mathf.Log((BT + BTS) / CS + CS2));
    }