org.hps.detector.ecal

Class Transformations

java.lang.Object

org.hps.detector.ecal.Transformations

public final class Transformations
extends Object

Performs vector transformations to calculate center of crystal volume from front and back positions as defined in the conditions database.

Author:

Annie Simonyan

Field Summary

Fields

Modifier and Type	Field and Description
static Logger	LOGGER
private double[]	rotation
private GVector	transVec
private GVector	vecBot
private GVector	vecTop

Constructor Summary

Constructors

Constructor and Description
Transformations(double[] trans, double[] rot) Create a new Transformations object.

Method Summary

Modifier and Type	Method and Description
Geant4Position	transformToGeant4(EcalCrystalPosition position, EcalChannel channel) perform rotation and translation operation for a single crystal
private GVector	transformVector(GVector vec, GVector coordOrigin)

Methods inherited from class java.lang.Object

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

Field Detail

LOGGER

public static Logger LOGGER

transVec

private GVector transVec

rotation

private double[] rotation

vecTop

private final GVector vecTop

vecBot

private final GVector vecBot

Constructor Detail

Transformations

public Transformations(double[] trans,
                       double[] rot)

Create a new Transformations object.

Parameters:

trans - translation in space as an array containing [x,y,z] coordinates

rot - rotation in space as an array with angles [alpha, beta, gamma] or [rx, ry, rz]

Method Detail

transformToGeant4

public Geant4Position transformToGeant4(EcalCrystalPosition position,
                                        EcalChannel channel)

perform rotation and translation operation for a single crystal

Parameters:

position - crystal position

channel - crystal channel

Returns:

crystal position in G4 conventions

transformVector

private GVector transformVector(GVector vec,
                                GVector coordOrigin)