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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 | |
9ac3aec9 | 21 | #include "AliStack.h" |
0742d588 | 22 | #include "AliTrackReference.h" |
ac3eaff4 | 23 | #include "AliExternalTrackParam.h" |
24 | #include "AliKalmanTrack.h" | |
65b311b3 | 25 | #include <Riostream.h> |
2d74ba4f | 26 | |
27 | // | |
28 | // Track Reference object is created every time particle is | |
29 | // crossing detector bounds. The object is created by Step Manager | |
30 | // | |
31 | // The class stores the following informations: | |
32 | // track label, | |
33 | // track position: X,Y,X | |
34 | // track momentum px, py, pz | |
35 | // track length and time of fligth: both in cm | |
36 | // status bits from Monte Carlo | |
37 | // | |
38 | ||
aab9c8d5 | 39 | |
40 | ClassImp(AliTrackReference) | |
41 | ||
e2afb3b6 | 42 | //_______________________________________________________________________ |
43 | AliTrackReference::AliTrackReference(): | |
448312df | 44 | TObject(), |
e2afb3b6 | 45 | fTrack(0), |
46 | fX(0), | |
47 | fY(0), | |
48 | fZ(0), | |
49 | fPx(0), | |
50 | fPy(0), | |
51 | fPz(0), | |
448312df | 52 | fLength(0), |
3142ebc3 | 53 | fTime(0), |
9ac3aec9 | 54 | fUserId(0), |
55 | fDetectorId(-999) | |
aab9c8d5 | 56 | { |
57 | // | |
58 | // Default constructor | |
2d74ba4f | 59 | // Creates empty object |
60 | ||
61 | for(Int_t i=0; i<16; i++) ResetBit(BIT(i)); | |
62 | } | |
63 | ||
9ac3aec9 | 64 | AliTrackReference::AliTrackReference(const AliTrackReference &tr) : |
65 | TObject(), | |
66 | fTrack(tr.fTrack), | |
67 | fX(tr.fX), | |
68 | fY(tr.fY), | |
69 | fZ(tr.fZ), | |
70 | fPx(tr.fPx), | |
71 | fPy(tr.fPy), | |
72 | fPz(tr.fPz), | |
73 | fLength(tr.fLength), | |
74 | fTime(tr.fTime), | |
75 | fUserId(tr.fUserId), | |
76 | fDetectorId(tr.fDetectorId) | |
77 | { | |
78 | // Copy Constructor | |
79 | } | |
80 | ||
2d74ba4f | 81 | //_______________________________________________________________________ |
9ac3aec9 | 82 | AliTrackReference::AliTrackReference(Int_t label, Int_t id) : |
90e48c0c | 83 | TObject(), |
84 | fTrack(label), | |
85 | fX(0), | |
86 | fY(0), | |
87 | fZ(0), | |
88 | fPx(0), | |
89 | fPy(0), | |
90 | fPz(0), | |
91 | fLength(gMC->TrackLength()), | |
3142ebc3 | 92 | fTime(gMC->TrackTime()), |
9ac3aec9 | 93 | fUserId(0), |
94 | fDetectorId(id) | |
448312df | 95 | { |
2d74ba4f | 96 | // |
97 | // Create Reference object out of label and | |
98 | // data in TVirtualMC object | |
99 | // | |
100 | // Creates an object and fill all parameters | |
101 | // from data in VirtualMC | |
aab9c8d5 | 102 | // |
2d74ba4f | 103 | // Sylwester Radomski, (S.Radomski@gsi.de) |
104 | // GSI, Jan 31, 2003 | |
105 | // | |
2cad796f | 106 | |
90e48c0c | 107 | Double_t vec[4]; |
2d74ba4f | 108 | |
90e48c0c | 109 | gMC->TrackPosition(vec[0],vec[1],vec[2]); |
2d74ba4f | 110 | |
111 | fX = vec[0]; | |
112 | fY = vec[1]; | |
113 | fZ = vec[2]; | |
114 | ||
90e48c0c | 115 | gMC->TrackMomentum(vec[0],vec[1],vec[2],vec[3]); |
2d74ba4f | 116 | |
117 | fPx = vec[0]; | |
118 | fPy = vec[1]; | |
b745fc4c | 119 | fPz = vec[2]; |
2d74ba4f | 120 | |
121 | // Set Up status code | |
122 | // Copy Bits from virtual MC | |
123 | ||
124 | for(Int_t i=0; i<16; i++) ResetBit(BIT(i)); | |
125 | ||
2cad796f | 126 | SetBit(BIT(0), gMC->IsNewTrack()); |
127 | SetBit(BIT(1), gMC->IsTrackAlive()); | |
128 | SetBit(BIT(2), gMC->IsTrackDisappeared()); | |
129 | SetBit(BIT(3), gMC->IsTrackEntering()); | |
130 | SetBit(BIT(4), gMC->IsTrackExiting()); | |
131 | SetBit(BIT(5), gMC->IsTrackInside()); | |
132 | SetBit(BIT(6), gMC->IsTrackOut()); | |
133 | SetBit(BIT(7), gMC->IsTrackStop()); | |
9ac3aec9 | 134 | // |
135 | // This particle has to be kept | |
136 | ||
aab9c8d5 | 137 | } |
2d74ba4f | 138 | //_______________________________________________________________________ |
ac3eaff4 | 139 | AliExternalTrackParam * AliTrackReference::MakeTrack(const AliTrackReference *ref, Double_t mass) |
140 | { | |
141 | // | |
142 | // Make dummy track from the track reference | |
143 | // negative mass means opposite charge | |
144 | // | |
145 | Double_t xx[5]; | |
146 | Double_t cc[15]; | |
147 | for (Int_t i=0;i<15;i++) cc[i]=0; | |
148 | Double_t x = ref->X(), y = ref->Y(), z = ref->Z(); | |
149 | Double_t alpha = TMath::ATan2(y,x); | |
150 | Double_t xr = TMath::Sqrt(x*x+y*y); | |
b31d3cd8 | 151 | xx[0] = ref->LocalY(); |
ac3eaff4 | 152 | xx[1] = z; |
153 | xx[3] = ref->Pz()/ref->Pt(); | |
c9ec41e8 | 154 | xx[4] = 1./ref->Pt(); |
ac3eaff4 | 155 | if (mass<0) xx[4]*=-1.; // negative mass - negative direction |
156 | Double_t alphap = TMath::ATan2(ref->Py(),ref->Px())-alpha; | |
157 | if (alphap> TMath::Pi()) alphap-=TMath::Pi(); | |
158 | if (alphap<-TMath::Pi()) alphap+=TMath::Pi(); | |
159 | xx[2] = TMath::Sin(alphap); | |
c9ec41e8 | 160 | |
ac3eaff4 | 161 | AliExternalTrackParam * track = new AliExternalTrackParam(xr,alpha,xx,cc); |
ac3eaff4 | 162 | return track; |
163 | } | |
164 | ||
65b311b3 | 165 | //_______________________________________________________________________ |
166 | void | |
9ac3aec9 | 167 | AliTrackReference::Print(Option_t* /*opt*/) const |
65b311b3 | 168 | { |
169 | 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)" | |
170 | " Length=%7.2f Time=%7.2f UserId=%d", | |
171 | Label(),P(),Px(),Py(),Pz(),X(),Y(),Z(),GetLength(),GetTime()) << endl; | |
172 | } | |
ac3eaff4 | 173 |