org.hps.detector.ecal

Class Geant4Position

java.lang.Object

org.hps.detector.ecal.Geant4Position

public final class Geant4Position
extends Object

Calculate G4 position for a crystal, by it's front and back face coordinates calculates the position for the center of the crystal calculates the rotation of the crystal in convention of Tait-Bryan angles, {phi, theta, psi} phi-rotation around X theta-rotation around Y psi-rotation around Z

Author:

Annie Simonyan

Field Summary

Fields

Modifier and Type	Field and Description
private double[]	centerArr
private GVector	centerPoint
private GVector	crysvec
private double[]	taitbriangles

Constructor Summary

Constructors

Constructor and Description
Geant4Position(GVector point1, GVector point2) constructor

Method Summary

Modifier and Type	Method and Description
private void	calculateTaitBryanAngles()
GVector	getCenter()
double[]	getCenterArr()
double[]	getTaitBryanAngles()
void	Print() Print crystal center coordinates(X,Y,Z) and Tait-Bryan angles
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

centerPoint

private GVector centerPoint

crysvec

private GVector crysvec

taitbriangles

private double[] taitbriangles

centerArr

private double[] centerArr

Constructor Detail

Geant4Position

public Geant4Position(GVector point1,
                      GVector point2)

constructor

Parameters:

point1 - (x,y,z) of crystal front face center point as GVector

point2 - (x,y,z) of crystal back face center point as GVector

Method Detail

getCenter

public GVector getCenter()

Returns:

center coordinates as a GVector

getCenterArr

public double[] getCenterArr()

Returns:

center coordinates as an array double[x_center, y_center, z_center]

getTaitBryanAngles

public double[] getTaitBryanAngles()

Returns:

Tait-Bryan angles as an array doubles [phi, theta, psi]

calculateTaitBryanAngles

private void calculateTaitBryanAngles()
                               throws ArithmeticException

Throws:

ArithmeticException

Print

public void Print()

Print crystal center coordinates(X,Y,Z) and Tait-Bryan angles

toString

public String toString()

Overrides:

toString in class Object

Returns:

String of Geant4Position object attributes