hep.lcd.vertexing.zvtop
Class ZvTrkDist

java.lang.Object
  |
  +--hep.lcd.vertexing.zvtop.ZvTrkDist

public class ZvTrkDist

extends Object

ZvTrkDist

Calculation of transverse and longitudinal distance between track and reference line.
See K.Abe et al. (SLD collab.), PRL 80,4 (1998) 660-665.

Version:

$Id: ZvTrkDist.java,v 1.2 2001/06/05 18:20:58 walkowia Exp $

Author:

Wolfgang Walkowiak, 10/05/00

Source Code:

ZvTrkDist.java

Constructor Summary

ZvTrkDist(ZvTrack track, double[] x1, double[] x2)
Calculate transverse and longitudinal distances between track and line

Method Summary

double	angle() angle in radians between track and reference (vertex) axis, the value of longDist() is less usefull for low angles
double	longDist() distance from initial point of along reference axis to point where the transverse distance is measured, negative if in opposite direction than axis Note: -1000, if there is no solution, ie track parallel to axis
double	transDist() closest approach of track to reference (vertex) axis

Methods inherited from class java.lang.Object

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

Constructor Detail

ZvTrkDist

public ZvTrkDist(ZvTrack track,
                 double[] x1,
                 double[] x2)

Calculate transverse and longitudinal distances between track and line

Parameters:

track - track to be considered

x1 - start point of line (ie beam spot)

x2 - end poin of line

Method Detail

transDist

public double transDist()

closest approach of track to reference (vertex) axis

longDist

public double longDist()

distance from initial point of along reference axis to point where the transverse distance is measured, negative if in opposite direction than axis
Note: -1000, if there is no solution, ie track parallel to axis

angle

public double angle()

angle in radians between track and reference (vertex) axis, the value of longDist() is less usefull for low angles