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d54804bf | 1 | // $Id$ |
ce565086 | 2 | // ************************************************************************** |
fbb9b71b | 3 | // This file is property of and copyright by the ALICE HLT Project * |
d54804bf | 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() | |
fbb9b71b | 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 ) | |
fbb9b71b | 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 | ||
fbb9b71b | 39 | for ( int i = 0; i < 7; i++ ) fPar[i] = 0; |
40 | for ( int i = 0; i < 7; i++ ) fTPCPar[i] = 0; | |
d54804bf | 41 | fP = 0; |
42 | fPt = 0; | |
43 | ||
fbb9b71b | 44 | if ( !part ) return; |
d54804bf | 45 | TLorentzVector mom, vtx; |
fbb9b71b | 46 | part->ProductionVertex( vtx ); |
47 | part->Momentum( mom ); | |
d54804bf | 48 | fPar[0] = part->Vx(); |
49 | fPar[1] = part->Vy(); | |
50 | fPar[2] = part->Vz(); | |
51 | fP = part->P(); | |
52 | fPt = part->Pt(); | |
fbb9b71b | 53 | double 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; | |
d54804bf | 57 | fPar[6] = 0; |
fbb9b71b | 58 | fPDG = part->GetPdgCode(); |
59 | if ( CAMath::Abs( fPDG ) < 100000 ) { | |
60 | TParticlePDG *pPDG = TDatabasePDG::Instance()->GetParticle( fPDG ); | |
61 | if ( pPDG ) fPar[6] = pPDG->Charge() / 3.0 * pi; | |
d54804bf | 62 | } |
63 | } | |
eb30eb49 | 64 | |
fbb9b71b | 65 | void AliHLTTPCCAMCTrack::SetTPCPar( float X, float Y, float Z, |
66 | float Px, float Py, float Pz ) | |
eb30eb49 | 67 | { |
68 | //* Set parameters at TPC entrance | |
69 | ||
fbb9b71b | 70 | for ( int i = 0; i < 7; i++ ) fTPCPar[i] = 0; |
eb30eb49 | 71 | |
72 | fTPCPar[0] = X; | |
73 | fTPCPar[1] = Y; | |
74 | fTPCPar[2] = Z; | |
fbb9b71b | 75 | double p = CAMath::Sqrt( Px * Px + Py * Py + Pz * Pz ); |
76 | double pi = ( p > 1.e-4 ) ? 1. / p : 0; | |
77 | fTPCPar[3] = Px * pi; | |
78 | fTPCPar[4] = Py * pi; | |
79 | fTPCPar[5] = Pz * pi; | |
eb30eb49 | 80 | fTPCPar[6] = 0; |
fbb9b71b | 81 | if ( CAMath::Abs( fPDG ) < 100000 ) { |
82 | TParticlePDG *pPDG = TDatabasePDG::Instance()->GetParticle( fPDG ); | |
83 | if ( pPDG ) fTPCPar[6] = pPDG->Charge() / 3.0 * pi; | |
eb30eb49 | 84 | } |
85 | } |