org.hps.recon.vertexing

Class BFitter

java.lang.Object

org.hps.recon.vertexing.BFitter

All Implemented Interfaces:

VFitter

public class BFitter
extends Object
implements VFitter

Performs a Kalman fit to a list of tracks and returns a Vertex object.

Field Summary

Fields

Modifier and Type	Field and Description
private double	_bField

Constructor Summary

Constructors

Constructor and Description
BFitter(double bField)

Method Summary

Modifier and Type	Method and Description
private org.lcsim.recon.vertexing.billoir.Vertex	fit(int ntrk, boolean fitwb, boolean[] invtx, double[][] par, double[][] wgt, double[] xyz)
org.lcsim.recon.vertexing.billoir.Vertex	fit(List<org.lcsim.event.Track> tracks, org.lcsim.spacegeom.SpacePoint initialPosition, boolean withBeamConstraint)
private double[]	flattenMatrix(double[][] matrix)
static double	fmod1(double value, double range)
private double	fwdch2(double[] wgt, double d1, double d2, double d3, double d4, double d5)
private double[][]	getJacobi(double[] old) Conversion matrix from org.lcsim track parameters (old) to internal parameters
org.lcsim.recon.vertexing.billoir.Perigee	perigee(double[] rawdat, double xb, double yb)
org.lcsim.recon.vertexing.billoir.Vertex	pxfvtx(int ntrk, boolean fitwb, boolean[] invtx, double[][] par, double[][] wgt, double[] xyz)
private double[]	pxmi3_old(double[] wgt)
private double[]	pxmi3(double[] wgt)
private double[]	pxmi5(double[] wgt)

Methods inherited from class java.lang.Object

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

Field Detail

_bField

private double _bField

Constructor Detail

BFitter

public BFitter(double bField)

Method Detail

fmod1

public static double fmod1(double value,
                           double range)

fit

private org.lcsim.recon.vertexing.billoir.Vertex fit(int ntrk,
                                                     boolean fitwb,
                                                     boolean[] invtx,
                                                     double[][] par,
                                                     double[][] wgt,
                                                     double[] xyz)

fit

public org.lcsim.recon.vertexing.billoir.Vertex fit(List<org.lcsim.event.Track> tracks,
                                                    org.lcsim.spacegeom.SpacePoint initialPosition,
                                                    boolean withBeamConstraint)

Specified by:

fit in interface VFitter

getJacobi

private double[][] getJacobi(double[] old)

Conversion matrix from org.lcsim track parameters (old) to internal parameters

flattenMatrix

private double[] flattenMatrix(double[][] matrix)

pxmi5

private double[] pxmi5(double[] wgt)

fwdch2

private double fwdch2(double[] wgt,
                      double d1,
                      double d2,
                      double d3,
                      double d4,
                      double d5)

perigee

public org.lcsim.recon.vertexing.billoir.Perigee perigee(double[] rawdat,
                                                         double xb,
                                                         double yb)

pxmi3

private double[] pxmi3(double[] wgt)

pxmi3_old

private double[] pxmi3_old(double[] wgt)

pxfvtx

public org.lcsim.recon.vertexing.billoir.Vertex pxfvtx(int ntrk,
                                                       boolean fitwb,
                                                       boolean[] invtx,
                                                       double[][] par,
                                                       double[][] wgt,
                                                       double[] xyz)