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0ee00e25 | 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 | ||
16 | /////////////////////////////////////////////////////////////////////////////// | |
17 | // | |
52cd0cc0 | 18 | // ESD format for the TRD tracks calculated in the |
19 | // Global Tracking Unit, used for the TRD L1 trigger | |
20 | // | |
21 | // Author: Jochen Klein <jochen.klein@cern.ch> | |
0ee00e25 | 22 | // |
23 | /////////////////////////////////////////////////////////////////////////////// | |
24 | ||
3d1168d4 | 25 | #include "TMath.h" |
26 | ||
0ee00e25 | 27 | #include "AliESDTrdTrack.h" |
52cd0cc0 | 28 | #include "AliESDTrdTracklet.h" |
0ee00e25 | 29 | |
30 | ClassImp(AliESDTrdTrack) | |
31 | ||
32 | //_____________________________________________________________________________ | |
33 | AliESDTrdTrack::AliESDTrdTrack(): | |
34 | TObject(), | |
52cd0cc0 | 35 | fSector(-1), |
36 | fStack(-1), | |
37 | fA(0), | |
38 | fB(0), | |
39 | fC(0), | |
40 | fY(0), | |
0ee00e25 | 41 | fPID(0), |
52cd0cc0 | 42 | fLayerMask(0), |
43 | fFlags(0), | |
44 | fReserved(0), | |
45 | fLabel(-1) | |
0ee00e25 | 46 | { |
0ee00e25 | 47 | // |
48 | // Default constructor | |
748a7a1b | 49 | for (int i=fgkNlayers;i--;) fTrackletIndex[i] = 0; |
0ee00e25 | 50 | // |
51 | ||
52 | } | |
53 | ||
0ee00e25 | 54 | AliESDTrdTrack::AliESDTrdTrack(const AliESDTrdTrack& track): |
55 | TObject(track), | |
52cd0cc0 | 56 | fSector(track.fSector), |
57 | fStack(track.fStack), | |
58 | fA(track.fA), | |
59 | fB(track.fB), | |
60 | fC(track.fC), | |
61 | fY(track.fY), | |
0ee00e25 | 62 | fPID(track.fPID), |
52cd0cc0 | 63 | fLayerMask(track.fLayerMask), |
64 | fFlags(track.fFlags), | |
65 | fReserved(track.fReserved), | |
66 | fLabel(track.fLabel) | |
0ee00e25 | 67 | { |
0ee00e25 | 68 | // |
69 | // Copy contructor | |
70 | // | |
71 | ||
52cd0cc0 | 72 | for (Int_t iLayer = 0; iLayer < 6; iLayer++) { |
73 | fTrackletIndex[iLayer] = track.fTrackletIndex[iLayer]; | |
74 | ||
75 | if (track.fTrackletRefs[iLayer].GetObject()) | |
76 | fTrackletRefs[iLayer] = track.fTrackletRefs[iLayer]; | |
77 | } | |
0ee00e25 | 78 | } |
79 | ||
0ee00e25 | 80 | AliESDTrdTrack& AliESDTrdTrack::operator=(const AliESDTrdTrack& track) |
81 | { | |
52cd0cc0 | 82 | // |
83 | // assignment operator | |
0ee00e25 | 84 | // |
85 | ||
86 | if (this == &track) | |
87 | return *this; | |
cd888a89 | 88 | TObject::operator=(track); |
52cd0cc0 | 89 | fLabel = track.fLabel; |
90 | fSector = track.fSector; | |
91 | for (Int_t iLayer = 0; iLayer < 6; iLayer++) { | |
92 | fTrackletIndex[iLayer] = track.fTrackletIndex[iLayer]; | |
93 | fTrackletRefs[iLayer] = track.fTrackletRefs[iLayer]; | |
94 | } | |
0ee00e25 | 95 | |
96 | return *this; | |
0ee00e25 | 97 | } |
98 | ||
52cd0cc0 | 99 | void AliESDTrdTrack::Copy(TObject& obj) const |
100 | { | |
101 | // this overwrites the virtual TOBject::Copy() | |
732a24fe | 102 | // to allow run time copying without casting |
103 | // in AliESDEvent | |
104 | ||
105 | if(this==&obj)return; | |
106 | AliESDTrdTrack *robj = dynamic_cast<AliESDTrdTrack*>(&obj); | |
52cd0cc0 | 107 | if(!robj)return; // not an aliesdtrdtrack |
732a24fe | 108 | *robj = *this; |
109 | } | |
52cd0cc0 | 110 | |
111 | ULong64_t AliESDTrdTrack::GetTrackWord(Int_t /* rev */) const | |
112 | { | |
113 | // return track word representation as in raw data | |
114 | // MSB always 1 | |
115 | ||
116 | ULong64_t trackWord = 1; | |
117 | AppendBits(trackWord, 1, 0); | |
118 | AppendBits(trackWord, 6, fLayerMask); | |
119 | AppendBits(trackWord, 18, fA); | |
120 | AppendBits(trackWord, 18, fB); | |
121 | AppendBits(trackWord, 12, fC); | |
122 | AppendBits(trackWord, 8, fPID); | |
123 | return trackWord; | |
124 | } | |
125 | ||
126 | ULong64_t AliESDTrdTrack::GetExtendedTrackWord(Int_t /* rev */) const | |
127 | { | |
128 | // return extended track word representation as in raw data | |
129 | // MSB always 0 | |
130 | ||
131 | ULong64_t trackWord = 0; | |
132 | AppendBits(trackWord, 11, fFlags); | |
133 | AppendBits(trackWord, 3, fReserved); | |
134 | AppendBits(trackWord, 13, fY); | |
135 | AppendBits(trackWord, 6, fTrackletIndex[5]); | |
136 | AppendBits(trackWord, 6, fTrackletIndex[4]); | |
137 | AppendBits(trackWord, 6, fTrackletIndex[3]); | |
138 | AppendBits(trackWord, 6, fTrackletIndex[2]); | |
139 | AppendBits(trackWord, 6, fTrackletIndex[1]); | |
140 | AppendBits(trackWord, 6, fTrackletIndex[0]); | |
141 | return trackWord; | |
142 | } | |
143 | ||
144 | Int_t AliESDTrdTrack::GetPt() const | |
145 | { | |
146 | // calculate pt from a as done in hardware | |
147 | ||
148 | const Int_t maskIdLut[64] = { | |
149 | -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, | |
150 | -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, -1, 2, -1, 3, 4, 5, | |
151 | -1, -1, -1, -1, -1, -1, -1, 6, -1, -1, -1, 7, -1, 8, 9, 10, | |
152 | -1, -1, -1, 11, -1, 12, 13, 14, -1, 15, 16, 17, 18, 19, 20, 21 | |
153 | }; | |
154 | ||
155 | const Int_t c1Lut[32] = { | |
156 | -2371, -2474, -2474, -2474, -2563, -2448, -2578, -2578, | |
157 | -2578, -2670, -2557, -2578, -2578, -2670, -2557, -2578, | |
158 | -2670, -2557, -2763, -2557, -2644, -2523, -1, -1, | |
159 | -1, -1, -1, -1, -1, -1, -1, -1 | |
160 | }; | |
161 | ||
162 | if (this->GetA() != 0) { | |
163 | Int_t layerMaskId = maskIdLut[this->GetLayerMask()]; | |
164 | Int_t c1 = c1Lut[layerMaskId]; | |
165 | Int_t c1Ext = c1 << 8; | |
e6d1f6ad | 166 | Int_t ptRawStage4 = c1Ext / ((this->GetA() >> 2) != 0 ? (this->GetA() >> 2) : 1 ); |
52cd0cc0 | 167 | Int_t ptRawComb4 = ptRawStage4; |
168 | Int_t ptExtComb4 = (ptRawComb4 > 0) ? ptRawComb4 + 33 : ptRawComb4 - 30; | |
169 | ||
170 | return -ptExtComb4/2; | |
171 | } | |
172 | else | |
173 | return 0; | |
174 | } | |
3d1168d4 | 175 | |
176 | Int_t AliESDTrdTrack::Compare(const TObject* obj) const | |
177 | { | |
178 | if (this == obj) | |
179 | return 0; | |
180 | else if (TMath::Abs(Pt()) < TMath::Abs(((AliESDTrdTrack*)(obj))->Pt())) | |
181 | return 1; | |
182 | else | |
183 | return -1; | |
184 | } |