LTDescr.easeInOutQuart C# (CSharp) Method

    private Vector3 easeInOutQuart()
    {
        val = this.ratioPassed * 2f;
        if (val < 1f) {
            val = val * val * val * val;
            return new Vector3(this.diffDiv2.x * val + this.from.x, this.diffDiv2.y * val + this.from.y, this.diffDiv2.z * val + this.from.z);
        }
        val -= 2f;
        //		val = (val * val * val * val - 2f);
        return -this.diffDiv2 * (val * val * val * val - 2f) + this.from;
    }