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aab9c8d5 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, 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 | ||
0742d588 | 16 | /* $Id$ */ |
116cbefd | 17 | |
2cad796f | 18 | #include "TVirtualMC.h" |
9ac3aec9 | 19 | #include "TParticle.h" |
0742d588 | 20 | |
0742d588 | 21 | #include "AliTrackReference.h" |
65b311b3 | 22 | #include <Riostream.h> |
2d74ba4f | 23 | |
24 | // | |
25 | // Track Reference object is created every time particle is | |
26 | // crossing detector bounds. The object is created by Step Manager | |
27 | // | |
28 | // The class stores the following informations: | |
29 | // track label, | |
30 | // track position: X,Y,X | |
31 | // track momentum px, py, pz | |
32 | // track length and time of fligth: both in cm | |
33 | // status bits from Monte Carlo | |
34 | // | |
35 | ||
aab9c8d5 | 36 | |
37 | ClassImp(AliTrackReference) | |
38 | ||
e2afb3b6 | 39 | //_______________________________________________________________________ |
40 | AliTrackReference::AliTrackReference(): | |
448312df | 41 | TObject(), |
e2afb3b6 | 42 | fTrack(0), |
43 | fX(0), | |
44 | fY(0), | |
45 | fZ(0), | |
46 | fPx(0), | |
47 | fPy(0), | |
48 | fPz(0), | |
448312df | 49 | fLength(0), |
3142ebc3 | 50 | fTime(0), |
9ac3aec9 | 51 | fUserId(0), |
52 | fDetectorId(-999) | |
aab9c8d5 | 53 | { |
54 | // | |
55 | // Default constructor | |
2d74ba4f | 56 | // Creates empty object |
57 | ||
58 | for(Int_t i=0; i<16; i++) ResetBit(BIT(i)); | |
59 | } | |
60 | ||
9ac3aec9 | 61 | AliTrackReference::AliTrackReference(const AliTrackReference &tr) : |
62 | TObject(), | |
63 | fTrack(tr.fTrack), | |
64 | fX(tr.fX), | |
65 | fY(tr.fY), | |
66 | fZ(tr.fZ), | |
67 | fPx(tr.fPx), | |
68 | fPy(tr.fPy), | |
69 | fPz(tr.fPz), | |
70 | fLength(tr.fLength), | |
71 | fTime(tr.fTime), | |
72 | fUserId(tr.fUserId), | |
73 | fDetectorId(tr.fDetectorId) | |
74 | { | |
75 | // Copy Constructor | |
76 | } | |
77 | ||
2d74ba4f | 78 | //_______________________________________________________________________ |
9ac3aec9 | 79 | AliTrackReference::AliTrackReference(Int_t label, Int_t id) : |
90e48c0c | 80 | TObject(), |
81 | fTrack(label), | |
82 | fX(0), | |
83 | fY(0), | |
84 | fZ(0), | |
85 | fPx(0), | |
86 | fPy(0), | |
87 | fPz(0), | |
88 | fLength(gMC->TrackLength()), | |
3142ebc3 | 89 | fTime(gMC->TrackTime()), |
9ac3aec9 | 90 | fUserId(0), |
91 | fDetectorId(id) | |
448312df | 92 | { |
2d74ba4f | 93 | // |
94 | // Create Reference object out of label and | |
95 | // data in TVirtualMC object | |
96 | // | |
97 | // Creates an object and fill all parameters | |
98 | // from data in VirtualMC | |
aab9c8d5 | 99 | // |
2d74ba4f | 100 | // Sylwester Radomski, (S.Radomski@gsi.de) |
101 | // GSI, Jan 31, 2003 | |
102 | // | |
2cad796f | 103 | |
90e48c0c | 104 | Double_t vec[4]; |
2d74ba4f | 105 | |
90e48c0c | 106 | gMC->TrackPosition(vec[0],vec[1],vec[2]); |
2d74ba4f | 107 | |
108 | fX = vec[0]; | |
109 | fY = vec[1]; | |
110 | fZ = vec[2]; | |
111 | ||
90e48c0c | 112 | gMC->TrackMomentum(vec[0],vec[1],vec[2],vec[3]); |
2d74ba4f | 113 | |
114 | fPx = vec[0]; | |
115 | fPy = vec[1]; | |
b745fc4c | 116 | fPz = vec[2]; |
2d74ba4f | 117 | |
118 | // Set Up status code | |
119 | // Copy Bits from virtual MC | |
120 | ||
121 | for(Int_t i=0; i<16; i++) ResetBit(BIT(i)); | |
122 | ||
2cad796f | 123 | SetBit(BIT(0), gMC->IsNewTrack()); |
124 | SetBit(BIT(1), gMC->IsTrackAlive()); | |
125 | SetBit(BIT(2), gMC->IsTrackDisappeared()); | |
126 | SetBit(BIT(3), gMC->IsTrackEntering()); | |
127 | SetBit(BIT(4), gMC->IsTrackExiting()); | |
128 | SetBit(BIT(5), gMC->IsTrackInside()); | |
129 | SetBit(BIT(6), gMC->IsTrackOut()); | |
130 | SetBit(BIT(7), gMC->IsTrackStop()); | |
9ac3aec9 | 131 | // |
132 | // This particle has to be kept | |
133 | ||
aab9c8d5 | 134 | } |
78e46ba8 | 135 | /* |
ac3eaff4 | 136 | AliExternalTrackParam * AliTrackReference::MakeTrack(const AliTrackReference *ref, Double_t mass) |
137 | { | |
138 | // | |
139 | // Make dummy track from the track reference | |
140 | // negative mass means opposite charge | |
141 | // | |
142 | Double_t xx[5]; | |
143 | Double_t cc[15]; | |
144 | for (Int_t i=0;i<15;i++) cc[i]=0; | |
145 | Double_t x = ref->X(), y = ref->Y(), z = ref->Z(); | |
146 | Double_t alpha = TMath::ATan2(y,x); | |
147 | Double_t xr = TMath::Sqrt(x*x+y*y); | |
b31d3cd8 | 148 | xx[0] = ref->LocalY(); |
ac3eaff4 | 149 | xx[1] = z; |
150 | xx[3] = ref->Pz()/ref->Pt(); | |
c9ec41e8 | 151 | xx[4] = 1./ref->Pt(); |
ac3eaff4 | 152 | if (mass<0) xx[4]*=-1.; // negative mass - negative direction |
153 | Double_t alphap = TMath::ATan2(ref->Py(),ref->Px())-alpha; | |
154 | if (alphap> TMath::Pi()) alphap-=TMath::Pi(); | |
155 | if (alphap<-TMath::Pi()) alphap+=TMath::Pi(); | |
156 | xx[2] = TMath::Sin(alphap); | |
c9ec41e8 | 157 | |
ac3eaff4 | 158 | AliExternalTrackParam * track = new AliExternalTrackParam(xr,alpha,xx,cc); |
ac3eaff4 | 159 | return track; |
160 | } | |
78e46ba8 | 161 | */ |
65b311b3 | 162 | //_______________________________________________________________________ |
163 | void | |
9ac3aec9 | 164 | AliTrackReference::Print(Option_t* /*opt*/) const |
65b311b3 | 165 | { |
166 | cout << Form("Label %d P=%7.2f (X,Y,Z)=(%7.2f,%7.2f,%7.2f) (PX,PY,PZ)=(%7.2f,%7.2f,%7.2f)" | |
167 | " Length=%7.2f Time=%7.2f UserId=%d", | |
168 | Label(),P(),Px(),Py(),Pz(),X(),Y(),Z(),GetLength(),GetTime()) << endl; | |
169 | } | |
ac3eaff4 | 170 |