org.lcsim.recon.tracking.spacegeom

Class TwoSpacePoint

java.lang.Object

org.lcsim.recon.tracking.spacegeom.TwoSpacePoint

Direct Known Subclasses:

CartesianTwoPoint, CylindricalTwoPoint

public class TwoSpacePoint
extends Object

A point in 2-space. The default Space point is at the origin. Derived classes can be used to set values in cartesian or cylindrical coordinates. Point is set in the constructor and cannot be changed. The methods simply return different coordinates. Transformations (translations, rotations, etc) are carried out by external functions which return new TwoSpacePoints.

Version:

1.0

Author:

Norman A. Graf

Field Summary

Fields

Modifier and Type	Field and Description
protected double	_phi
protected double	_x
protected double	_xy
protected double	_y

Constructor Summary

Constructors

Constructor and Description
TwoSpacePoint() Default constructor.

Method Summary

Methods

Modifier and Type	Method and Description
double	cosPhi()
static double	distance(TwoSpacePoint tsp1, TwoSpacePoint tsp2)
private static boolean	equal(double x1, double x2)
boolean	equals(TwoSpacePoint tsp) Checks object equality
boolean	notEquals(TwoSpacePoint tsp) Checks object inequality
double	phi()
double	rxy()
double	sinPhi()
String	toString()
double	x()
double	y()

Methods inherited from class java.lang.Object

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

Field Detail

_x

protected double _x

_y

protected double _y

_xy

protected double _xy

_phi

protected double _phi

Constructor Detail

TwoSpacePoint

public TwoSpacePoint()

Default constructor. Sets point to be the origin with phi = 0.

Method Detail

equal

private static boolean equal(double x1,
            double x2)

x

public double x()

Returns:

Cartesian x coordinate

y

public double y()

Returns:

Cartesian y coordinate

rxy

public double rxy()

Returns:

Cylindrical radius coordinate

phi

public double phi()

Returns:

Cylindrical phi coordinate

cosPhi

public double cosPhi()

Returns:

Cosine of Cylindrical phi coordinate

sinPhi

public double sinPhi()

Returns:

Sine of Cylindrical phi coordinate

toString

public String toString()

Overrides:

toString in class Object

Returns:

String representation of this class

equals

public boolean equals(TwoSpacePoint tsp)

Checks object equality

Parameters:

tsp - TwoSpacePoint to compare with for equality

Returns:

true of this TwoSpacePoint equals tsp

notEquals

public boolean notEquals(TwoSpacePoint tsp)

Checks object inequality

Parameters:

tsp - TwoSpacePoint to compare with for inequality

Returns:

true of this TwoSpacePoint does not equal tsp

distance

public static double distance(TwoSpacePoint tsp1,
              TwoSpacePoint tsp2)

Parameters:

tsp1 - first TwoSpacePoint

tsp2 - second TwoSpacePoint

Returns:

Two diensional Euclidean distance between points