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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 | } |