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13918578 | 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 | **************************************************************************/ | |
bf6adc12 | 15 | |
16 | /* $Id$ */ | |
17 | ||
13918578 | 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 fgkMaxNumberOfClusters // | |
24 | //////////////////////////////////////////////////// | |
25 | ||
cc088660 | 26 | #include "AliITSgeomTGeo.h" |
13918578 | 27 | #include "AliITStrackSA.h" |
28 | ||
29 | ||
30 | ClassImp(AliITStrackSA) | |
31 | ||
32 | //_____________________________________ | |
e399f961 | 33 | AliITStrackSA:: AliITStrackSA() : AliITStrackMI(), |
34 | fNSA(0) | |
35 | { | |
13918578 | 36 | // Default constructor |
37 | SetNumberOfClusters(0); | |
38 | SetNumberOfClustersSA(0); | |
39 | ResetIndexSA(); | |
7e5bf5af | 40 | for(Int_t nlay=0;nlay<fgkLayers;nlay++){ |
41 | SetNumberOfMarked(nlay,0); | |
42 | } | |
43 | ResetMarked(); | |
13918578 | 44 | } |
45 | ||
46 | ||
47 | //___________________________________________________ | |
15dd636f | 48 | AliITStrackSA::AliITStrackSA(const AliITStrackMI& t) : |
e399f961 | 49 | AliITStrackMI(t), |
50 | fNSA(0){ | |
13918578 | 51 | // Copy a V2 track into a SA track |
52 | SetNumberOfClustersSA(0); | |
53 | ResetIndexSA(); | |
7e5bf5af | 54 | for(Int_t nlay=0;nlay<fgkLayers;nlay++){ |
55 | SetNumberOfMarked(nlay,0); | |
56 | } | |
57 | ResetMarked(); | |
58 | ||
13918578 | 59 | } |
60 | //___________________________________________________ | |
61 | AliITStrackSA::AliITStrackSA(const AliITStrackSA& t) : | |
e399f961 | 62 | AliITStrackMI(t), |
63 | fNSA(t.fNSA){ | |
13918578 | 64 | // Copy constructor |
65 | ||
7d62fb64 | 66 | |
13918578 | 67 | ResetIndexSA(); |
7e5bf5af | 68 | ResetMarked(); |
13918578 | 69 | Int_t number = t.GetNumberOfClustersSA(); |
70 | SetNumberOfClustersSA(number); | |
7e5bf5af | 71 | for(Int_t nlay=0;nlay<fgkLayers;nlay++){ |
72 | SetNumberOfMarked(nlay,t.GetNumberOfMarked(nlay)); | |
73 | } | |
13918578 | 74 | for(Int_t i=0;i<number;i++){ |
75 | fSain[i]=t.fSain[i]; | |
76 | } | |
7e5bf5af | 77 | for(Int_t nlay=0;nlay<fgkLayers;nlay++){ |
78 | for(Int_t i=0;i<t.GetNumberOfMarked(nlay);i++){ | |
79 | fCluMark[nlay][i]=t.fCluMark[nlay][i]; | |
80 | } | |
81 | } | |
13918578 | 82 | } |
83 | //____________________________________________________ | |
cc088660 | 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 ): |
e399f961 | 85 | fNSA(0) |
86 | { | |
13918578 | 87 | // standard constructor. Used for ITS standalone tracking |
7d62fb64 | 88 | |
13918578 | 89 | // get the azimuthal angle of the detector containing the innermost |
90 | // cluster of this track (data member fAlpha) | |
cc088660 | 91 | Double_t rotmatr[9]; |
92 | AliITSgeomTGeo::GetRotation(layer,ladder,detector,rotmatr); | |
6c94f330 | 93 | Double_t sAlpha=TMath::ATan2(rotmatr[1],rotmatr[0])+TMath::Pi(); |
94 | sAlpha+=TMath::Pi()/2.; | |
95 | if(layer==1) sAlpha+=TMath::Pi(); | |
13918578 | 96 | |
97 | ||
98 | // get the radius of this detector. Procedure taken from the | |
99 | // AliITStrackerV2 constructor | |
100 | Float_t x=0,y=0,z=0; | |
cc088660 | 101 | Double_t xyz[3]; |
102 | AliITSgeomTGeo::GetTranslation(layer,ladder,detector,xyz); | |
103 | x=xyz[0]; | |
104 | y=xyz[1]; | |
105 | z=xyz[2]; | |
13918578 | 106 | |
107 | Double_t fi=TMath::ATan2(rotmatr[1],rotmatr[0])+TMath::Pi(); | |
108 | fi+=TMath::Pi()/2; | |
109 | if (layer==1) fi+=TMath::Pi(); | |
110 | Double_t cp=TMath::Cos(fi), sp=TMath::Sin(fi); | |
6c94f330 | 111 | Double_t sX=x*cp+y*sp; |
13918578 | 112 | |
113 | ||
114 | fdEdx = 0; | |
115 | ||
6c94f330 | 116 | Double_t conv=GetBz()*kB2C; |
117 | Double_t sC[] = {0.000009, // 0.000009 | |
118 | 0., | |
119 | 0.000003, //0.000030 | |
120 | 0., | |
121 | 0., | |
122 | 0.000001, //0.000001 | |
123 | 0., | |
124 | 0., | |
125 | 0., | |
126 | 0.000002, //0.000002 | |
127 | 0., | |
128 | 0., | |
129 | 0., | |
130 | 0., | |
131 | 0.000001/(conv*conv)}; //0.0000001 | |
132 | ||
133 | Double_t sP[] = {Ycoor, | |
134 | Zcoor, | |
135 | TMath::Sin(phi-sAlpha), | |
136 | tanlambda, | |
137 | curv/conv}; | |
138 | ||
1966f03c | 139 | |
140 | // dealing with the case B=0 (taken from AliTPCtrack.cxx) | |
0e7590c3 | 141 | Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt(); |
142 | Double_t p0=TMath::Sign(1/mostProbablePt,sP[4]); | |
1966f03c | 143 | Double_t w0=sC[14]/(sC[14] + p0*p0), w1=p0*p0/(sC[14] + p0*p0); |
144 | sP[4] = w0*p0 + w1*sP[4]; | |
145 | sC[14]*=w1; | |
146 | ||
6c94f330 | 147 | Set(sX,sAlpha,sP,sC); |
148 | ||
13918578 | 149 | for(Int_t i=0; i<kMaxLayer; i++) fIndex[i] = 0; // to be set explicitely |
150 | ||
151 | for(Int_t i=0; i<4; i++) fdEdxSample[i] = 0; | |
152 | ||
153 | SetNumberOfClusters(0); | |
154 | SetNumberOfClustersSA(0); | |
7e5bf5af | 155 | for(Int_t nlay=0;nlay<fgkLayers;nlay++) SetNumberOfMarked(nlay,0); |
13918578 | 156 | ResetIndexSA(); |
7e5bf5af | 157 | ResetMarked(); |
13918578 | 158 | SetChi2(0); |
159 | SetMass(0.139); // pion mass | |
160 | SetLabel(lab); | |
161 | ||
162 | } | |
163 | ||
164 | //____________________________________________________________ | |
165 | void AliITStrackSA::AddClusterSA(Int_t layer, Int_t clnumb) { | |
166 | // add one clusters to the list (maximum number=fgkMaxNumberOfClusters) | |
167 | Int_t presnum = GetNumberOfClustersSA(); | |
168 | if(presnum>=fgkMaxNumberOfClusters){ | |
169 | Warning("AddClusterSA","Maximum number of clusters already reached. Nothing is done\n"); | |
170 | return; | |
171 | } | |
172 | ||
173 | fSain[presnum] = (layer<<28)+clnumb; | |
174 | presnum++; | |
175 | SetNumberOfClustersSA(presnum); | |
176 | } | |
177 | ||
7e5bf5af | 178 | //____________________________________________________________ |
179 | void AliITStrackSA::AddClusterMark(Int_t layer, Int_t clnumb) { | |
180 | // add one clusters to the list (maximum number=fgkMaxNumberOfClusters) | |
181 | Int_t presnum = GetNumberOfMarked(layer); | |
182 | // printf("presnum=%d\n",presnum); | |
183 | if(presnum>=fgkMaxNumberOfClustersL){ | |
184 | Warning("AddClusterMark","Maximum number of clusters already reached. Nothing is done\n"); | |
185 | return; | |
186 | } | |
187 | ||
188 | fCluMark[layer][presnum] = clnumb; | |
189 | presnum++; | |
190 | SetNumberOfMarked(layer,presnum); | |
191 | } | |
192 | ||
13918578 | 193 | //____________________________________________________________ |
194 | void AliITStrackSA::AddClusterV2(Int_t layer,Int_t clnumb) { | |
195 | // add one clusters to the list (maximum number=6) | |
196 | Int_t presnum = GetNumberOfClusters(); | |
197 | if(presnum>=kMaxLayer){ | |
198 | Warning("AddClusterV2","Maximum number of clusters already reached. Nothing is done\n"); | |
199 | return; | |
200 | } | |
201 | ||
202 | fIndex[presnum] = (layer<<28)+clnumb; | |
203 | presnum++; | |
204 | SetNumberOfClusters(presnum); | |
205 | } | |
206 | ||
7e5bf5af | 207 | //_____________________________________________________________ |
208 | void AliITStrackSA::ResetMarked(){ | |
13918578 | 209 | |
7e5bf5af | 210 | //Reset array of marked clusters |
211 | for(Int_t nlay=0;nlay<fgkLayers;nlay++){ | |
212 | for(Int_t k=0; k<fgkMaxNumberOfClustersL; k++) fCluMark[nlay][k]=0; | |
213 | } | |
214 | } | |
13918578 | 215 |