minor fix
[u/mrichter/AliRoot.git] / ITS / AliITStrackV2.h
... / ...
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1#ifndef ALIITSTRACKV2_H
2#define ALIITSTRACKV2_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6//-------------------------------------------------------------------------
7// ITS Track Class
8//
9// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
10// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
11//-------------------------------------------------------------------------
12
13#include <AliKalmanTrack.h>
14#include "AliITSRecoParam.h"
15#include "AliITSgeomTGeo.h"
16#include "AliESDtrack.h"
17
18/* $Id$ */
19
20class AliESDVertex;
21class AliTracker;
22
23//_____________________________________________________________________________
24class AliITStrackV2 : public AliKalmanTrack {
25public:
26 AliITStrackV2();
27 AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE);
28 AliITStrackV2(const AliITStrackV2& t);
29 ~AliITStrackV2(){fESDtrack=0;}
30
31 void SetCheckInvariant(Bool_t check=kTRUE) {fCheckInvariant=check;}
32 Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,
33 Bool_t anglecorr=kFALSE) {
34 return AliExternalTrackParam::CorrectForMeanMaterial(xOverX0,xTimesRho,GetMass(),anglecorr);
35 }
36 Bool_t CorrectForMaterial(Double_t d, Double_t x0=AliITSRecoParam::GetX0Air()) {
37 // deprecated: use CorrectForMeanMaterial instead
38 return AliExternalTrackParam::CorrectForMaterial(d,x0,GetMass());
39 }
40 Bool_t PropagateTo(Double_t xr, Double_t d, Double_t x0=AliITSRecoParam::GetX0Air());
41 Bool_t PropagateToTGeo(Double_t xToGo, Int_t nstep, Double_t &xOverX0, Double_t &xTimesRho, Bool_t addTime=kTRUE);
42 Bool_t PropagateToTGeo(Double_t xToGo, Int_t nstep=1, Bool_t addTime=kTRUE) {
43 Double_t dummy1,dummy2; return PropagateToTGeo(xToGo,nstep,dummy1,dummy2,addTime);
44 }
45 Double_t GetPredictedChi2(const AliCluster *cluster) const;
46 Bool_t Update(const AliCluster *cl, Double_t chi2, Int_t i);
47
48 Bool_t PropagateToVertex(const AliESDVertex *v,Double_t d=0.,Double_t x0=0.);
49 Bool_t Propagate(Double_t alpha, Double_t xr);
50 Bool_t Propagate(Double_t xr) { return Propagate(GetAlpha(),xr); }
51 Bool_t MeanBudgetToPrimVertex(Double_t xyz[3], Double_t step, Double_t &d) const;
52 Bool_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
53 Bool_t ImproveKalman(Double_t xyz[3],Double_t ers[3], const Double_t* xlMS, const Double_t* x2X0MS, Int_t nMS);
54 void SetdEdx(Double_t dedx) {fdEdx=dedx;}
55 void SetSampledEdx(Float_t q, Int_t i);
56 Float_t GetSampledEdx(Int_t i) const {return fdEdxSample[i];}
57 void CookdEdx(Double_t low=0., Double_t up=0.51);
58 void SetDetectorIndex(Int_t i) {SetLabel(i);}
59 void ResetClusters();
60 void UpdateESDtrack(ULong_t flags) const;
61
62 AliESDtrack *GetESDtrack() const {return fESDtrack;}
63 virtual ULong_t GetStatus() const {
64 if(fESDtrack){return fESDtrack->GetStatus();}
65 else { AliWarning("null ESD track pointer - status 0"); return 0;} }
66
67 Int_t GetDetectorIndex() const {return GetLabel();}
68 Double_t GetdEdx() const {return fdEdx;}
69 Double_t GetPIDsignal() const {return GetdEdx();}
70 using AliExternalTrackParam::GetC;
71 Double_t GetC() const {return AliExternalTrackParam::GetC(GetBz());}
72 Double_t GetD(Double_t x, Double_t y) const {
73 return AliExternalTrackParam::GetD(x,y,GetBz());
74 }
75 void GetDZ(Double_t xv, Double_t yv, Double_t zv, Float_t dz[2]) const {
76 return AliExternalTrackParam::GetDZ(xv,yv,zv,GetBz(),dz);
77 }
78
79 Bool_t GetGlobalXYZat(Double_t xloc,Double_t &x,Double_t &y,Double_t &z) const;
80 Bool_t GetPhiZat(Double_t r,Double_t &phi,Double_t &z) const;
81 Bool_t GetLocalXat(Double_t r,Double_t &xloc) const;
82
83 Int_t Compare(const TObject *o) const;
84 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
85 void SetModuleIndex(Int_t ilayer,Int_t idx) {fModule[ilayer]=idx;}
86 Int_t GetModuleIndex(Int_t ilayer) const {return fModule[ilayer];}
87 void SetModuleIndexInfo(Int_t ilayer,Int_t idet,Int_t status=1,Float_t xloc=0,Float_t zloc=0);
88 Bool_t GetModuleIndexInfo(Int_t ilayer,Int_t &idet,Int_t &status,Float_t &xloc,Float_t &zloc) const;
89 void SetSharedWeight(Int_t ilayer,Float_t w) {fSharedWeight[ilayer]=w;}
90 Float_t GetSharedWeight(Int_t ilayer) const {return fSharedWeight[ilayer];}
91 Bool_t Invariant() const;
92
93 void SetExtraCluster(Int_t ilayer, Int_t idx) {fIndex[AliITSgeomTGeo::kNLayers+ilayer]=idx;}
94 Int_t GetExtraCluster(Int_t ilayer) const {return fIndex[AliITSgeomTGeo::kNLayers+ilayer];}
95
96 void SetExtraModule(Int_t ilayer, Int_t idx) {fModule[AliITSgeomTGeo::kNLayers+ilayer]=idx;}
97 Int_t GetExtraModule(Int_t ilayer) const {return fModule[AliITSgeomTGeo::kNLayers+ilayer];}
98
99protected:
100
101 Bool_t fCheckInvariant; // check the covariance matrix
102
103 Double_t fdEdx; // dE/dx
104
105 static const Int_t fgkWARN; //! used for debugging purposes
106 Float_t fdEdxSample[4]; // array of dE/dx samples b.b.
107
108 Int_t fIndex[2*AliITSgeomTGeo::kNLayers]; // indices of associated clusters
109
110 Int_t fModule[2*AliITSgeomTGeo::kNLayers]; // indices of crossed modules:
111 // see SetModuleIndexInfo()
112
113 Float_t fSharedWeight[AliITSgeomTGeo::kNLayers]; // probability of sharing
114
115 AliESDtrack *fESDtrack; //! pointer to the connected ESD track
116
117private:
118 AliITStrackV2 &operator=(const AliITStrackV2 &tr);
119 ClassDef(AliITStrackV2,9) //ITS reconstructed track
120};
121
122inline void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
123 //----------------------------------------------------------------------
124 // This function stores dEdx sample corrected for the track segment length
125 // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
126 //----------------------------------------------------------------------
127 if (i<0) return;
128 if (i>3) return;
129 Double_t s=GetSnp(), t=GetTgl();
130 q *= TMath::Sqrt((1-s*s)/(1+t*t));
131 fdEdxSample[i]=q;
132 return;
133}
134
135inline void AliITStrackV2::SetModuleIndexInfo(Int_t ilayer,Int_t idet,Int_t status,
136 Float_t xloc,Float_t zloc) {
137 //----------------------------------------------------------------------
138 // This function encodes in the module number also the status of cluster association
139 // "status" can have the following values:
140 // 1 "found" (cluster is associated),
141 // 2 "dead" (module is dead from OCDB),
142 // 3 "skipped" (module or layer forced to be skipped),
143 // 4 "outinz" (track out of z acceptance),
144 // 5 "nocls" (no clusters in the road),
145 // 6 "norefit" (cluster rejected during refit)
146 // 7 "deadzspd" (holes in z in SPD)
147 // WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!
148 //----------------------------------------------------------------------
149
150 if(idet<0) {
151 idet=0;
152 } else {
153 // same detector numbering as in AliITSCalib classes
154 if(ilayer==1) idet+=AliITSgeomTGeo::GetNLadders(1)*AliITSgeomTGeo::GetNDetectors(1);
155 if(ilayer==3) idet+=AliITSgeomTGeo::GetNLadders(3)*AliITSgeomTGeo::GetNDetectors(3);
156 if(ilayer==5) idet+=AliITSgeomTGeo::GetNLadders(5)*AliITSgeomTGeo::GetNDetectors(5);
157 }
158
159 Int_t xInt = Int_t(xloc*10.);
160 Int_t zInt = Int_t(zloc*10.);
161
162 if(TMath::Abs(xloc*10.-(Float_t)xInt)>0.5){
163 if(zloc>0) {
164 xInt++;
165 }
166 else {
167 xInt--;
168 }
169 }
170 if(TMath::Abs(zloc*10.-(Float_t)zInt)>0.5){
171 if(zloc>0) {
172 zInt++;
173 }
174 else {
175 zInt--;
176 }
177 }
178 Int_t signs=0;
179 if(xInt>=0 && zInt>=0) signs=10000;
180 if(xInt>=0 && zInt<0) signs=20000;
181 if(xInt<0 && zInt>=0) signs=30000;
182 if(xInt<0 && zInt<0) signs=40000;
183
184 Int_t modindex = signs;
185
186 modindex += TMath::Abs(zInt);
187 modindex += TMath::Abs(xInt)*100;
188
189 modindex += status*100000;
190
191 modindex += idet*1000000;
192
193 SetModuleIndex(ilayer,modindex);
194 return;
195}
196
197inline Bool_t AliITStrackV2::GetModuleIndexInfo(Int_t ilayer,Int_t &idet,Int_t &status,
198 Float_t &xloc,Float_t &zloc) const {
199 //----------------------------------------------------------------------
200 // This function encodes in the module number also the status of cluster association
201 // "status" can have the following values:
202 // 1 "found" (cluster is associated),
203 // 2 "dead" (module is dead from OCDB),
204 // 3 "skipped" (module or layer forced to be skipped),
205 // 4 "outinz" (track out of z acceptance),
206 // 5 "nocls" (no clusters in the road),
207 // 6 "norefit" (cluster rejected during refit),
208 // 7 "deadzspd" (holes in z in SPD)
209 // Also given are the coordinates of the crossing point of track and module
210 // (in the local module ref. system)
211 // WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!
212 //----------------------------------------------------------------------
213
214
215 if(fModule[ilayer]==-1) {
216 AliError("fModule was not set !");
217 idet = -1;
218 status=0;
219 xloc=-99.; zloc=-99.;
220 return kFALSE;
221 }
222
223 Int_t module = fModule[ilayer];
224
225 idet = Int_t(module/1000000);
226
227 module -= idet*1000000;
228
229 status = Int_t(module/100000);
230
231 module -= status*100000;
232
233 Int_t signs = Int_t(module/10000);
234
235 module-=signs*10000;
236
237 Int_t xInt = Int_t(module/100);
238 module -= xInt*100;
239
240 Int_t zInt = module;
241
242 if(signs==1) { xInt*=1; zInt*=1; }
243 if(signs==2) { xInt*=1; zInt*=-1; }
244 if(signs==3) { xInt*=-1; zInt*=1; }
245 if(signs==4) { xInt*=-1; zInt*=-1; }
246
247 xloc = 0.1*(Float_t)xInt;
248 zloc = 0.1*(Float_t)zInt;
249
250 if(status==4) idet = -1;
251
252 return kTRUE;
253}
254
255
256#endif
257
258