LTDescr.easeOutQuart C# (CSharp) Method

    private Vector3 easeOutQuart()
    {
        val = this.ratioPassed - 1f;
        val = -(val * val * val * val - 1);
        return new Vector3(this.diff.x * val + this.from.x, this.diff.y * val + this.from.y,this.diff.z * val + this.from.z);
    }