BezierCurves.BezierCurve3D.GetNormalOnCubicCurve C# (CSharp) Method

        public static Vector3 GetNormalOnCubicCurve(float time, Vector3 up, BezierPoint3D startPoint, BezierPoint3D endPoint)
        {
            return GetNormalOnCubicCurve(time, up, startPoint.Position, endPoint.Position, startPoint.RightHandlePosition, endPoint.LeftHandlePosition);
        }

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

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

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