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1 | /************************************************************************** | |
2 | * Copyright(c) 1998-2003, 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 | /* $Id$ */ | |
17 | ||
18 | //////////////////////////////////////////////////// | |
19 | // Stand alone track class // | |
20 | // Origin: Elisabetta Crescio // | |
21 | // e-mail: crescio@to.infn.it // | |
22 | // it is a V2 track with a possible number // | |
23 | // of cluster equal to kMaxNumberOfClusters // | |
24 | //////////////////////////////////////////////////// | |
25 | ||
26 | #include "AliITSgeomTGeo.h" | |
27 | #include "AliITStrackSA.h" | |
28 | ||
29 | ||
30 | ClassImp(AliITStrackSA) | |
31 | ||
32 | //_____________________________________ | |
33 | AliITStrackSA:: AliITStrackSA() : AliITStrackMI(), | |
34 | fNSA(0) | |
35 | { | |
36 | // Default constructor | |
37 | SetNumberOfClusters(0); | |
38 | SetNumberOfClustersSA(0); | |
39 | ResetIndexSA(); | |
40 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
41 | SetNumberOfMarked(nlay,0); | |
42 | } | |
43 | ResetMarked(); | |
44 | } | |
45 | ||
46 | ||
47 | //___________________________________________________ | |
48 | AliITStrackSA::AliITStrackSA(const AliITStrackMI& t) : | |
49 | AliITStrackMI(t), | |
50 | fNSA(0){ | |
51 | // Copy a V2 track into a SA track | |
52 | SetNumberOfClustersSA(0); | |
53 | ResetIndexSA(); | |
54 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
55 | SetNumberOfMarked(nlay,0); | |
56 | } | |
57 | ResetMarked(); | |
58 | ||
59 | } | |
60 | //___________________________________________________ | |
61 | AliITStrackSA::AliITStrackSA(const AliITStrackSA& t) : | |
62 | AliITStrackMI(t), | |
63 | fNSA(t.fNSA){ | |
64 | // Copy constructor | |
65 | ||
66 | ||
67 | ResetIndexSA(); | |
68 | ResetMarked(); | |
69 | Int_t number = t.GetNumberOfClustersSA(); | |
70 | SetNumberOfClustersSA(number); | |
71 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
72 | SetNumberOfMarked(nlay,t.GetNumberOfMarked(nlay)); | |
73 | } | |
74 | for(Int_t i=0;i<number;i++){ | |
75 | fSain[i]=t.fSain[i]; | |
76 | } | |
77 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
78 | for(Int_t i=0;i<t.GetNumberOfMarked(nlay);i++){ | |
79 | fCluMark[nlay][i]=t.fCluMark[nlay][i]; | |
80 | } | |
81 | } | |
82 | } | |
83 | //____________________________________________________ | |
84 | AliITStrackSA::AliITStrackSA(Int_t layer, Int_t ladder, Int_t detector, Double_t Ycoor, Double_t Zcoor, Double_t phi, Double_t tanlambda, Double_t curv, Int_t lab ): | |
85 | fNSA(0) | |
86 | { | |
87 | // standard constructor. Used for ITS standalone tracking | |
88 | ||
89 | // get the azimuthal angle of the detector containing the innermost | |
90 | // cluster of this track (data member fAlpha) | |
91 | ||
92 | TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(layer,ladder,detector,m); | |
93 | const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(layer,ladder,detector); | |
94 | m.Multiply(tm); | |
95 | Double_t txyz[3]={0.}, xyz[3]={0.}; | |
96 | m.LocalToMaster(txyz,xyz); | |
97 | Double_t sAlpha=TMath::ATan2(xyz[1],xyz[0]); | |
98 | ||
99 | if (sAlpha<0) sAlpha+=TMath::TwoPi(); | |
100 | else if (sAlpha>=TMath::TwoPi()) sAlpha-=TMath::TwoPi(); | |
101 | ||
102 | Double_t sX=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]); | |
103 | ||
104 | fdEdx = 0; | |
105 | ||
106 | Double_t conv=GetBz()*kB2C; | |
107 | Double_t sC[] = {0.000009, // 0.000009 | |
108 | 0., | |
109 | 0.000003, //0.000030 | |
110 | 0., | |
111 | 0., | |
112 | 0.000001, //0.000001 | |
113 | 0., | |
114 | 0., | |
115 | 0., | |
116 | 0.000002, //0.000002 | |
117 | 0., | |
118 | 0., | |
119 | 0., | |
120 | 0., | |
121 | 0.000001/(conv*conv)}; //0.0000001 | |
122 | ||
123 | Double_t sP[] = {Ycoor, | |
124 | Zcoor, | |
125 | TMath::Sin(phi-sAlpha), | |
126 | tanlambda, | |
127 | curv/conv}; | |
128 | ||
129 | ||
130 | // dealing with the case B=0 (taken from AliTPCtrack.cxx) | |
131 | Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt(); | |
132 | Double_t p0=TMath::Sign(1/mostProbablePt,sP[4]); | |
133 | Double_t w0=sC[14]/(sC[14] + p0*p0), w1=p0*p0/(sC[14] + p0*p0); | |
134 | sP[4] = w0*p0 + w1*sP[4]; | |
135 | sC[14]*=w1; | |
136 | ||
137 | Set(sX,sAlpha,sP,sC); | |
138 | ||
139 | for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fIndex[i] = 0; // to be set explicitely | |
140 | ||
141 | for(Int_t i=0; i<4; i++) fdEdxSample[i] = 0; | |
142 | ||
143 | SetNumberOfClusters(0); | |
144 | SetNumberOfClustersSA(0); | |
145 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++) SetNumberOfMarked(nlay,0); | |
146 | ResetIndexSA(); | |
147 | ResetMarked(); | |
148 | SetChi2(0); | |
149 | SetMass(0.139); // pion mass | |
150 | SetLabel(lab); | |
151 | ||
152 | } | |
153 | ||
154 | //____________________________________________________________ | |
155 | void AliITStrackSA::AddClusterSA(Int_t layer, Int_t clnumb) { | |
156 | // add one clusters to the list (maximum number=kMaxNumberOfClusters) | |
157 | Int_t presnum = GetNumberOfClustersSA(); | |
158 | if(presnum>=kMaxNumberOfClusters){ | |
159 | Warning("AddClusterSA","Maximum number of clusters already reached. Nothing is done\n"); | |
160 | return; | |
161 | } | |
162 | ||
163 | fSain[presnum] = (layer<<28)+clnumb; | |
164 | presnum++; | |
165 | SetNumberOfClustersSA(presnum); | |
166 | } | |
167 | ||
168 | //____________________________________________________________ | |
169 | void AliITStrackSA::AddClusterMark(Int_t layer, Int_t clnumb) { | |
170 | // add one clusters to the list (maximum number=kMaxNumberOfClusters) | |
171 | Int_t presnum = GetNumberOfMarked(layer); | |
172 | // printf("presnum=%d\n",presnum); | |
173 | if(presnum>=kMaxNumberOfClustersL){ | |
174 | Warning("AddClusterMark","Maximum number of clusters already reached. Nothing is done\n"); | |
175 | return; | |
176 | } | |
177 | ||
178 | fCluMark[layer][presnum] = clnumb; | |
179 | presnum++; | |
180 | SetNumberOfMarked(layer,presnum); | |
181 | } | |
182 | ||
183 | //____________________________________________________________ | |
184 | void AliITStrackSA::AddClusterV2(Int_t layer,Int_t clnumb) { | |
185 | // add one clusters to the list (maximum number=6) | |
186 | Int_t presnum = GetNumberOfClusters(); | |
187 | if(presnum>=AliITSgeomTGeo::GetNLayers()){ | |
188 | Warning("AddClusterV2","Maximum number of clusters already reached. Nothing is done\n"); | |
189 | return; | |
190 | } | |
191 | ||
192 | fIndex[presnum] = (layer<<28)+clnumb; | |
193 | presnum++; | |
194 | SetNumberOfClusters(presnum); | |
195 | } | |
196 | ||
197 | //_____________________________________________________________ | |
198 | void AliITStrackSA::ResetMarked(){ | |
199 | ||
200 | //Reset array of marked clusters | |
201 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
202 | for(Int_t k=0; k<kMaxNumberOfClustersL; k++) fCluMark[nlay][k]=0; | |
203 | } | |
204 | } | |
205 |