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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(); | |
663c89cf | 44 | if (!fld) return 0.5*kAlmost0Field; |
ee5b41f1 | 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 | } | |
663c89cf | 52 | return TMath::Sign(0.5*kAlmost0Field,bz) + bz; |
f7a1cc68 | 53 | } |
8b6e3369 | 54 | |
55 | void AliVTrack::GetBxByBz(Double_t b[3]) const | |
56 | { | |
7d2fb6f7 | 57 | // returns the Bx, By and Bz components of the magnetic field (kG) |
8b6e3369 | 58 | AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField(); |
59 | if (!fld) { | |
60 | b[0] = b[1] = 0.; | |
663c89cf | 61 | b[2] = 0.5*kAlmost0Field; |
8b6e3369 | 62 | return; |
63 | } | |
64 | ||
65 | if (fld->IsUniform()) { | |
66 | b[0] = b[1] = 0.; | |
02d77919 | 67 | b[2] = fld->SolenoidField(); |
8b6e3369 | 68 | } else { |
69 | Double_t r[3]; GetXYZ(r); | |
02d77919 | 70 | fld->Field(r,b); |
8b6e3369 | 71 | } |
663c89cf | 72 | b[2] = (TMath::Sign(0.5*kAlmost0Field,b[2]) + b[2]); |
8b6e3369 | 73 | return; |
74 | } | |
02d77919 | 75 | |
fc9b31a7 | 76 | //________________________________________________________ |
77 | void AliVTrack::GetIntegratedTimes(Double_t */*times*/, Int_t /*nspec*/) const { return; } |