org.opentrafficsim.core.math

Class Speed3D

java.lang.Object

org.opentrafficsim.core.math.Speed3D

All Implemented Interfaces:

Serializable

public class Speed3D
extends Object
implements Serializable

A 3D speed vector, decomposed in X, Y, and Z-speed with easy conversion from and to a spherical coordinate system.
Physicists and mathematicians do not agree on the meaning of theta and phi. In this class the convention in the physics domain is used:

• theta is the angle from the z direction.
• phi is the projected angle in the xy-plane from the x direction.

N.B. In the geography domain yet another convention is used.

Copyright (c) 2013-2018 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

$LastChangedDate: 2015-07-24 02:58:59 +0200 (Fri, 24 Jul 2015) $, @version $Revision: 1147 $, by $Author: averbraeck $, initial version Dec 10, 2015

Author:

Alexander Verbraeck, Peter Knoppers

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Speed3D(double x, double y, double z, SpeedUnit unit) Construct a new Speed3D from three double Cartesian coordinates and a speed unit.
Speed3D(Speed speed, Direction theta, Direction phi) Construct a new Speed3D from a strongly typed speed and polar coordinates.
Speed3D(Speed x, Speed y, Speed z) Construct a new Speed3D from three strongly typed Cartesian coordinates.
Speed3D(SpeedVector speed) Construct a new Speed3D from vector of strongly typed Cartesian coordinates.

Method Summary

Modifier and Type	Method and Description
Direction	getPhi() Retrieve the phi of this Speed3D.
Speed	getSpeed() Retrieve the norm of this Speed3D.
Direction	getTheta() Retrieve the theta of this Speed3D.
Speed	getX() Retrieve the x-component of this Speed3D.
Speed	getY() Retrieve the y-component of this Speed3D.
Speed	getZ() Retrieve the z-component of this Speed3D.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Speed3D

public Speed3D(SpeedVector speed)
        throws ValueException

Construct a new Speed3D from vector of strongly typed Cartesian coordinates.

Parameters:

speed - the speeds in 3D (YPR coded)

Throws:

ValueException - in case the vector does not have exactly three elements

Speed3D

public Speed3D(Speed x,
               Speed y,
               Speed z)
        throws ValueException

Construct a new Speed3D from three strongly typed Cartesian coordinates.

Parameters:

x - the speed in the x-direction

y - the speed in the y-direction

z - the speed in the z-direction

Throws:

ValueException - in case the units are incorrect

Speed3D

public Speed3D(double x,
               double y,
               double z,
               SpeedUnit unit)
        throws ValueException

Construct a new Speed3D from three double Cartesian coordinates and a speed unit.

Parameters:

x - the speed in the x-direction

y - the speed in the y-direction

z - the speed in the z-direction

unit - the unit of the xyz parameters

Throws:

ValueException - in case the units are incorrect

Speed3D

public Speed3D(Speed speed,
               Direction theta,
               Direction phi)
        throws ValueException

Construct a new Speed3D from a strongly typed speed and polar coordinates.

Parameters:

speed - Speed; the speed in the direction of the angle along the vector

theta - Direction; the angle from the z direction

phi - Direction; the projected angle in the xy-plane from the x direction

Throws:

ValueException - in case the vector does not have exactly three elements

Method Detail

getX

public final Speed getX()

Retrieve the x-component of this Speed3D.

Returns:

the speed in the x-direction.

getY

public final Speed getY()

Retrieve the y-component of this Speed3D.

Returns:

the speed in the y-direction.

getZ

public final Speed getZ()

Retrieve the z-component of this Speed3D.

Returns:

the speed in the z-direction.

getTheta

public final Direction getTheta()

Retrieve the theta of this Speed3D.

Returns:

the angle of direction perpendicular to the xy-plane

getPhi

public final Direction getPhi()

Retrieve the phi of this Speed3D.

Returns:

the projected angle of direction in the xy-plane

getSpeed

public final Speed getSpeed()

Retrieve the norm of this Speed3D.

Returns:

the combined speed in the direction of the angle

toString

public final String toString()

Overrides:

toString in class Object