BezierCurves.BezierCurve3D.GetRotationOnCubicCurve C# (CSharp) Method

        public static Quaternion GetRotationOnCubicCurve(float time, Vector3 up, Vector3 startPosition, Vector3 endPosition, Vector3 startTangent, Vector3 endTangent)
        {
            Vector3 tangent = GetTangentOnCubicCurve(time, startPosition, endPosition, startTangent, endTangent);
            Vector3 normal = GetNormalOnCubicCurve(time, up, startPosition, endPosition, startTangent, endTangent);

            return Quaternion.LookRotation(tangent, normal);
        }

        public Quaternion GetRotation(float time, Vector3 up)
        {
            BezierPoint3D startPoint;
            BezierPoint3D endPoint;
            float         timeRelativeToSegment;

            this.GetCubicSegment(time, out startPoint, out endPoint, out timeRelativeToSegment);

            return(BezierCurve3D.GetRotationOnCubicCurve(timeRelativeToSegment, up, startPoint, endPoint));
        }