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d54804bf | 1 | // $Id$ |
ce565086 | 2 | // ************************************************************************** |
d54804bf | 3 | // This file is property of and copyright by the ALICE HLT Project * |
4 | // ALICE Experiment at CERN, All rights reserved. * | |
5 | // * | |
6 | // Primary Authors: Sergey Gorbunov <sergey.gorbunov@kip.uni-heidelberg.de> * | |
7 | // Ivan Kisel <kisel@kip.uni-heidelberg.de> * | |
8 | // for The ALICE HLT Project. * | |
9 | // * | |
10 | // Permission to use, copy, modify and distribute this software and its * | |
11 | // documentation strictly for non-commercial purposes is hereby granted * | |
12 | // without fee, provided that the above copyright notice appears in all * | |
13 | // copies and that both the copyright notice and this permission notice * | |
14 | // appear in the supporting documentation. The authors make no claims * | |
15 | // about the suitability of this software for any purpose. It is * | |
16 | // provided "as is" without express or implied warranty. * | |
ce565086 | 17 | // * |
d54804bf | 18 | //*************************************************************************** |
19 | ||
ce565086 | 20 | |
d54804bf | 21 | #include "AliHLTTPCCAMCTrack.h" |
4687b8fc | 22 | #include "AliHLTTPCCAMath.h" |
d54804bf | 23 | #include "TParticle.h" |
24 | #include "TDatabasePDG.h" | |
d54804bf | 25 | |
26 | ||
27 | AliHLTTPCCAMCTrack::AliHLTTPCCAMCTrack() | |
eb30eb49 | 28 | : fPDG(0), fP(0), fPt(0), fNHits(0), fNMCPoints(0), fFirstMCPointID(0), fNReconstructed(0), fSet(0), fNTurns(0) |
d54804bf | 29 | { |
30 | //* Default constructor | |
31 | } | |
32 | ||
33 | ||
34 | AliHLTTPCCAMCTrack::AliHLTTPCCAMCTrack( const TParticle *part ) | |
eb30eb49 | 35 | : fPDG(0), fP(0), fPt(0), fNHits(0), fNMCPoints(0), fFirstMCPointID(0), fNReconstructed(0), fSet(0), fNTurns(0) |
d54804bf | 36 | { |
37 | //* Constructor from TParticle | |
38 | ||
39 | for( Int_t i=0; i<7; i++ ) fPar[i] = 0; | |
eb30eb49 | 40 | for( Int_t i=0; i<7; i++ ) fTPCPar[i] = 0; |
d54804bf | 41 | fP = 0; |
42 | fPt = 0; | |
43 | ||
44 | if( !part ) return; | |
45 | TLorentzVector mom, vtx; | |
46 | part->ProductionVertex(vtx); | |
47 | part->Momentum(mom); | |
48 | fPar[0] = part->Vx(); | |
49 | fPar[1] = part->Vy(); | |
50 | fPar[2] = part->Vz(); | |
51 | fP = part->P(); | |
52 | fPt = part->Pt(); | |
53 | Double_t pi = ( fP >1.e-4 ) ?1./fP :0; | |
54 | fPar[3] = part->Px()*pi; | |
55 | fPar[4] = part->Py()*pi; | |
56 | fPar[5] = part->Pz()*pi; | |
57 | fPar[6] = 0; | |
eb30eb49 | 58 | fPDG = part->GetPdgCode(); |
00d07bcd | 59 | if ( CAMath::Abs(fPDG) < 100000 ){ |
eb30eb49 | 60 | TParticlePDG *pPDG = TDatabasePDG::Instance()->GetParticle(fPDG); |
d54804bf | 61 | if( pPDG ) fPar[6] = pPDG->Charge()/3.0*pi; |
62 | } | |
63 | } | |
eb30eb49 | 64 | |
65 | void AliHLTTPCCAMCTrack::SetTPCPar( Float_t X, Float_t Y, Float_t Z, | |
66 | Float_t Px, Float_t Py, Float_t Pz ) | |
67 | { | |
68 | //* Set parameters at TPC entrance | |
69 | ||
70 | for( Int_t i=0; i<7; i++ ) fTPCPar[i] = 0; | |
71 | ||
72 | fTPCPar[0] = X; | |
73 | fTPCPar[1] = Y; | |
74 | fTPCPar[2] = Z; | |
00d07bcd | 75 | Double_t p = CAMath::Sqrt(Px*Px + Py*Py + Pz*Pz); |
eb30eb49 | 76 | Double_t pi = ( p >1.e-4 ) ?1./p :0; |
77 | fTPCPar[3] = Px*pi; | |
78 | fTPCPar[4] = Py*pi; | |
79 | fTPCPar[5] = Pz*pi; | |
80 | fTPCPar[6] = 0; | |
00d07bcd | 81 | if ( CAMath::Abs(fPDG) < 100000 ){ |
eb30eb49 | 82 | TParticlePDG *pPDG = TDatabasePDG::Instance()->GetParticle(fPDG); |
83 | if( pPDG ) fTPCPar[6] = pPDG->Charge()/3.0*pi; | |
84 | } | |
85 | } |