This method returns a Vector3d indicating the direction at the specified station.
public Vector3d GetDirectionAtStation( double station )
Public Function GetDirectionAtStation ( station As Double ) As Vector3d
public: Vector3d GetDirectionAtStation( double station )
This indexer returns a Vector3d that indicates the direction at the specified station. The station value must be in the range StartStation < = station < = EndStation. If the station value provided, fails to be in the required range, a zero-length vector is returned.