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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 | Init(sAlpha,sX,Ycoor,Zcoor,phi,tanlambda,curv,lab); | |
105 | ||
106 | } | |
107 | //____________________________________________________ | |
108 | AliITStrackSA::AliITStrackSA(Double_t alpha, Double_t radius, Double_t Ycoor, Double_t Zcoor, Double_t phi, Double_t tanlambda, Double_t curv, Int_t lab ): | |
109 | fNSA(0) | |
110 | { | |
111 | // standard constructor. Used for ITS standalone tracking | |
112 | ||
113 | // get the azimuthal angle of the detector containing the innermost | |
114 | // cluster of this track (data member fAlpha) | |
115 | ||
116 | if (alpha<0) alpha+=TMath::TwoPi(); | |
117 | else if (alpha>=TMath::TwoPi()) alpha-=TMath::TwoPi(); | |
118 | Init(alpha,radius,Ycoor,Zcoor,phi,tanlambda,curv,lab); | |
119 | } | |
120 | //____________________________________________________ | |
121 | void AliITStrackSA::Init(Double_t alpha, Double_t radius, Double_t Ycoor, Double_t Zcoor, Double_t phi, Double_t tanlambda, Double_t curv, Int_t lab ){ | |
122 | // initialize parameters | |
123 | ||
124 | fdEdx = 0; | |
125 | ||
126 | Double_t conv=GetBz()*kB2C; | |
127 | Double_t sC[] = {0.000009, // 0.000009 | |
128 | 0., | |
129 | 0.000003, //0.000030 | |
130 | 0., | |
131 | 0., | |
132 | 0.000001, //0.000001 | |
133 | 0., | |
134 | 0., | |
135 | 0., | |
136 | 0.000002, //0.000002 | |
137 | 0., | |
138 | 0., | |
139 | 0., | |
140 | 0., | |
141 | 0.000001/(conv*conv)}; //0.0000001 | |
142 | ||
143 | Double_t sP[] = {Ycoor, | |
144 | Zcoor, | |
145 | TMath::Sin(phi-alpha), | |
146 | tanlambda, | |
147 | curv/conv}; | |
148 | ||
149 | ||
150 | // dealing with the case B=0 (taken from AliTPCtrack.cxx) | |
151 | Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt(); | |
152 | Double_t p0=TMath::Sign(1/mostProbablePt,sP[4]); | |
153 | Double_t w0=sC[14]/(sC[14] + p0*p0), w1=p0*p0/(sC[14] + p0*p0); | |
154 | sP[4] = w0*p0 + w1*sP[4]; | |
155 | sC[14]*=w1; | |
156 | ||
157 | Set(radius,alpha,sP,sC); | |
158 | ||
159 | for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fIndex[i] = 0; // to be set explicitely | |
160 | ||
161 | for(Int_t i=0; i<4; i++) fdEdxSample[i] = 0; | |
162 | ||
163 | SetNumberOfClusters(0); | |
164 | SetNumberOfClustersSA(0); | |
165 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++) SetNumberOfMarked(nlay,0); | |
166 | ResetIndexSA(); | |
167 | ResetMarked(); | |
168 | SetChi2(0); | |
169 | SetMass(0.139); // pion mass | |
170 | SetLabel(lab); | |
171 | ||
172 | } | |
173 | ||
174 | //____________________________________________________________ | |
175 | void AliITStrackSA::AddClusterSA(Int_t layer, Int_t clnumb) { | |
176 | // add one clusters to the list (maximum number=kMaxNumberOfClusters) | |
177 | Int_t presnum = GetNumberOfClustersSA(); | |
178 | if(presnum>=kMaxNumberOfClusters){ | |
179 | Warning("AddClusterSA","Maximum number of clusters already reached. Nothing is done\n"); | |
180 | return; | |
181 | } | |
182 | ||
183 | fSain[presnum] = (layer<<28)+clnumb; | |
184 | presnum++; | |
185 | SetNumberOfClustersSA(presnum); | |
186 | } | |
187 | ||
188 | //____________________________________________________________ | |
189 | void AliITStrackSA::AddClusterMark(Int_t layer, Int_t clnumb) { | |
190 | // add one clusters to the list (maximum number=kMaxNumberOfClusters) | |
191 | Int_t presnum = GetNumberOfMarked(layer); | |
192 | // printf("presnum=%d\n",presnum); | |
193 | if(presnum>=kMaxNumberOfClustersL){ | |
194 | Warning("AddClusterMark","Maximum number of clusters already reached. Nothing is done\n"); | |
195 | return; | |
196 | } | |
197 | ||
198 | fCluMark[layer][presnum] = clnumb; | |
199 | presnum++; | |
200 | SetNumberOfMarked(layer,presnum); | |
201 | } | |
202 | ||
203 | //____________________________________________________________ | |
204 | void AliITStrackSA::AddClusterV2(Int_t layer,Int_t clnumb) { | |
205 | // add one clusters to the list (maximum number=6) | |
206 | Int_t presnum = GetNumberOfClusters(); | |
207 | if(presnum>=AliITSgeomTGeo::GetNLayers()){ | |
208 | Warning("AddClusterV2","Maximum number of clusters already reached. Nothing is done\n"); | |
209 | return; | |
210 | } | |
211 | ||
212 | fIndex[presnum] = (layer<<28)+clnumb; | |
213 | presnum++; | |
214 | SetNumberOfClusters(presnum); | |
215 | } | |
216 | ||
217 | //_____________________________________________________________ | |
218 | void AliITStrackSA::ResetMarked(){ | |
219 | ||
220 | //Reset array of marked clusters | |
221 | for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){ | |
222 | for(Int_t k=0; k<kMaxNumberOfClustersL; k++) fCluMark[nlay][k]=0; | |
223 | } | |
224 | } | |
225 |