org.lcsim.recon.tracking.spacegeom

Class SpacePointVector

java.lang.Object

org.lcsim.recon.tracking.spacegeom.SpacePoint

org.lcsim.recon.tracking.spacegeom.SpacePointVector

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

CartesianPointVector, CylindricalPointVector, SpacePath, SphericalPointVector

public class SpacePointVector
extends SpacePoint
implements Serializable, Cloneable

A vector at a point in space. The vector can be constructed in Cartesian, cylindrical or spherical coordinates and components can be fetched for any of these systems. The default constructor creates a vector of zero length at the origin. Finite vectors of nonzero length at any point can be constructed using subclasses.

The point and vector stored in a space vector cannot be modified except by assignment from another space vector.

Transformations (translations, rotations, etc) are not provided. It is expected these will be carried out by external functions which return new SpacePointVector objects.

The three orthogonal coordinate systems are defined in the usual way:

• Cartesian: (x, y, z)
• Cylindrical: (rxy, phi, z)
• Spherical: (rxyz, theta, phi) .

The rotation from Cartesian to cylindrical:

cosj sinj 0 - sinj cosj 0 0 0 1

The rotation from cylindrical to Cartesian:

cosj - sinj 0 sinj cosj 0 0 0 1

The rotation from Cartesian to spherical:

sinJcosj sinJsinj cosJ cosJcosj cosJsinj - sinJ - sinj cosj 0

The rotation from spherical to Cartesian:

sinJcosj cosJcosj - sinj sinJsinj cosJsinj cosj cosJ - sinJ 0

Version:

1.0

Author:

Norman A. Graf

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
(package private) double	_vx
(package private) double	_vy
(package private) double	_vz

Fields inherited from class org.lcsim.recon.tracking.spacegeom.SpacePoint

_phi, _theta, _x, _xy, _xyz, _y, _z

Constructor Summary

Constructors

Constructor and Description
SpacePointVector() //Default Constructor
SpacePointVector(SpacePoint spt) SpacePointVector Constructor from a space point.
SpacePointVector(SpacePointVector spv)

Method Summary

Methods

Modifier and Type	Method and Description
Object	clone() Clone
boolean	equals(SpacePointVector spv)
double	magnitude() magnitude
boolean	notEquals(SpacePointVector spv)
String	toString() Output Stream
double	v_phi() v_phi
double	v_rxy() v_rxy
double	v_rxyz() v_rxyz
double	v_theta() v_theta
double	v_x() v_x
double	v_y() v_y
double	v_z() v_z

Methods inherited from class org.lcsim.recon.tracking.spacegeom.SpacePoint

cosPhi, cosTheta, distance, equals, getCartesianArray, notEquals, openingAngle, phi, rxy, rxyz, sinPhi, sinTheta, theta, x, y, z

Methods inherited from class java.lang.Object

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

Field Detail

_vx

double _vx

_vy

double _vy

_vz

double _vz

Constructor Detail

SpacePointVector

public SpacePointVector()

//Default Constructor

SpacePointVector

public SpacePointVector(SpacePoint spt)

SpacePointVector Constructor from a space point. // Creates a vector of zero length.

Parameters:

spt -

SpacePointVector

public SpacePointVector(SpacePointVector spv)

Method Detail

clone

public Object clone()

Description copied from class: SpacePoint

Clone

Overrides:

clone in class SpacePoint

Returns:

a copy of this object

v_x

public double v_x()

v_x

Returns:

double

v_y

public double v_y()

v_y

Returns:

double

v_z

public double v_z()

v_z

Returns:

double

v_rxy

public double v_rxy()

v_rxy

Returns:

double

v_phi

public double v_phi()

v_phi

Returns:

double

v_rxyz

public double v_rxyz()

v_rxyz

Returns:

double

v_theta

public double v_theta()

v_theta

Returns:

double

magnitude

public double magnitude()

magnitude

Returns:

double

equals

public boolean equals(SpacePointVector spv)

notEquals

public boolean notEquals(SpacePointVector spv)

Parameters:

spv -

Returns:

!

toString

public String toString()

Description copied from class: SpacePoint

Output Stream

Overrides:

toString in class SpacePoint

Returns:

String representation of object