org.orekit.attitudes.directions
Class ConstantVectorDirection

java.lang.Object
  org.orekit.attitudes.directions.ConstantVectorDirection

All Implemented Interfaces:

IDirection

public final class ConstantVectorDirection
extends Object
implements IDirection

Direction described only by a vector constant in a frame

Since:

1.1

Version:

$Id: ConstantVectorDirection.java 11329 2014-10-29 15:21:19Z maggiorani $

Author:

Thomas Trapier

Concurrency :

not thread-safe

Concurrency comment :

The use of a frame linked to the tree of frames makes this class not thread-safe.

Constructor Summary

ConstantVectorDirection(Vector3D inVector, Frame inFrame)
Build a direction from a frame and a vector constant in this frame

Method Summary

Frame	getFrame()
Line	getLine(PVCoordinatesProvider pvCoord, AbsoluteDate date, Frame frame) Provides the line containing the given origin point and directed by the direction vector
Vector3D	getVector(PVCoordinatesProvider pvCoord, AbsoluteDate date, Frame frame) Provides the direction vector at a given date in a given frame.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ConstantVectorDirection

public ConstantVectorDirection(Vector3D inVector,
                               Frame inFrame)

Build a direction from a frame and a vector constant in this frame

Parameters:

inVector - the constant vector in the input frame

inFrame - the frame in which the vector is the constant given one

Method Detail

getFrame

public Frame getFrame()

Returns:

the frame

getVector

public Vector3D getVector(PVCoordinatesProvider pvCoord,
                          AbsoluteDate date,
                          Frame frame)
                   throws OrekitException

Provides the direction vector at a given date in a given frame. This Direction has no origin, so the pv coordinates are unused.

Specified by:

getVector in interface IDirection

Parameters:

pvCoord - UNUSED

date - the date

frame - the frame to project the vector's coordinates

Returns:

the direction vector at the given date in the given frame

Throws:

OrekitException - if some frame specific errors occur

getLine

public Line getLine(PVCoordinatesProvider pvCoord,
                    AbsoluteDate date,
                    Frame frame)
             throws OrekitException

Provides the line containing the given origin point and directed by the direction vector

Specified by:

getLine in interface IDirection

Parameters:

pvCoord - the origin of the line

date - the current date

frame - the expression frame of the line

Returns:

the Line of space containing the origin (pvCoord) and direction vector

Throws:

OrekitException - if some frame specific errors occur