[u/mrichter/AliRoot.git] / STEER / AliVTrack.cxx

/**************************************************************************
 * Copyright(c) 1998-2008, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/


//-------------------------------------------------------------------------
//     base class for ESD and AOD tracks
//     Author: A. Dainese
//-------------------------------------------------------------------------

#include <TGeoGlobalMagField.h>

#include "AliMagF.h"
#include "AliVTrack.h"

ClassImp(AliVTrack)

AliVTrack::AliVTrack(const AliVTrack& vTrack) :
  AliVParticle(vTrack) { } // Copy constructor

AliVTrack& AliVTrack::operator=(const AliVTrack& vTrack)
{ if (this!=&vTrack) { 
    AliVParticle::operator=(vTrack); 
  }
  
  return *this; 
}

Double_t AliVTrack::GetBz() const 
{
  // returns Bz component of the magnetic field (kG)
  AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField();
  if (!fld) return kAlmost0Field;
  double bz;
  if (fld->IsUniform()) bz = -fld->SolenoidField();
  else {
    Double_t r[3]; 
    GetXYZ(r); 
    bz = -fld->GetBz(r);
  }
  return TMath::Sign(kAlmost0Field,bz) + bz;
}
Commit	Line	Data
4f6e22bd	1	/**************************************************************************
	2	* Copyright(c) 1998-2008, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16
	17	//-------------------------------------------------------------------------
	18	// base class for ESD and AOD tracks
	19	// Author: A. Dainese
	20	//-------------------------------------------------------------------------
	21
f7a1cc68	22	#include <TGeoGlobalMagField.h>
	23
	24	#include "AliMagF.h"
4f6e22bd	25	#include "AliVTrack.h"
	26
	27	ClassImp(AliVTrack)
	28
	29	AliVTrack::AliVTrack(const AliVTrack& vTrack) :
	30	AliVParticle(vTrack) { } // Copy constructor
	31
	32	AliVTrack& AliVTrack::operator=(const AliVTrack& vTrack)
	33	{ if (this!=&vTrack) {
	34	AliVParticle::operator=(vTrack);
	35	}
	36
	37	return *this;
	38	}
	39
f7a1cc68	40	Double_t AliVTrack::GetBz() const
	41	{
	42	// returns Bz component of the magnetic field (kG)
	43	AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField();
	44	if (!fld) return kAlmost0Field;
	45	double bz;
	46	if (fld->IsUniform()) bz = -fld->SolenoidField();
	47	else {
	48	Double_t r[3];
	49	GetXYZ(r);
	50	bz = -fld->GetBz(r);
	51	}
	52	return TMath::Sign(kAlmost0Field,bz) + bz;
	53	}