- Introduce fixed step size for material retrieval from TGeo, default is 1mm,
[u/mrichter/AliRoot.git] / ITS / AliITStrackV2.h
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006b5f7f 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
a9a2d814 10// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
006b5f7f 11//-------------------------------------------------------------------------
12
006b5f7f 13#include <AliKalmanTrack.h>
44347160 14#include "AliITSRecoParam.h"
e50912db 15#include "AliITSgeomTGeo.h"
006b5f7f 16
ae00569a 17/* $Id$ */
18
83d73500 19class AliESDtrack;
58e536c5 20class AliESDVertex;
006b5f7f 21
22//_____________________________________________________________________________
8676d691 23class AliITStrackV2 : public AliKalmanTrack {
006b5f7f 24public:
22b13da0 25 AliITStrackV2();
67c3dcbe 26 AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
006b5f7f 27 AliITStrackV2(const AliITStrackV2& t);
43d2197f 28 ~AliITStrackV2(){fESDtrack=0;}
6c94f330 29
e50912db 30 Bool_t CorrectForMeanMaterial(Double_t xOverX0, Double_t xTimesRho,
31 Bool_t anglecorr=kFALSE) {
32 return AliExternalTrackParam::CorrectForMeanMaterial(xOverX0,xTimesRho,GetMass(),anglecorr);
33 }
34 Bool_t CorrectForMaterial(Double_t d, Double_t x0=AliITSRecoParam::GetX0Air()) {
35 // deprecated: use CorrectForMeanMaterial instead
6c94f330 36 return AliExternalTrackParam::CorrectForMaterial(d,x0,GetMass());
37 }
e50912db 38 Bool_t PropagateTo(Double_t xr, Double_t d, Double_t x0=AliITSRecoParam::GetX0Air());
39 Bool_t PropagateToTGeo(Double_t xToGo, Int_t nstep, Double_t &xOverX0, Double_t &xTimesRho);
40 Bool_t PropagateToTGeo(Double_t xToGo, Int_t nstep=1) {
41 Double_t dummy1,dummy2; return PropagateToTGeo(xToGo,nstep,dummy1,dummy2);
afd25725 42 }
6c94f330 43 Double_t GetPredictedChi2(const AliCluster *cluster) const;
44 Bool_t Update(const AliCluster *cl, Double_t chi2, Int_t i);
45
e50912db 46 Bool_t PropagateToVertex(const AliESDVertex *v,Double_t d=0.,Double_t x0=0.);
6c94f330 47 Bool_t Propagate(Double_t alpha, Double_t xr);
9be1d1c7 48 Bool_t Propagate(Double_t xr) { return Propagate(GetAlpha(),xr); }
afd25725 49 Bool_t MeanBudgetToPrimVertex(Double_t xyz[3], Double_t step, Double_t &d) const;
6c94f330 50 Bool_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
51
7f6ddf58 52 void SetdEdx(Double_t dedx) {fdEdx=dedx;}
a9a2d814 53 void SetSampledEdx(Float_t q, Int_t i);
b9671574 54 Float_t GetSampledEdx(Int_t i) const {return fdEdxSample[i];}
a9a2d814 55 void CookdEdx(Double_t low=0., Double_t up=0.51);
006b5f7f 56 void SetDetectorIndex(Int_t i) {SetLabel(i);}
7ac23097 57 void ResetClusters();
15dd636f 58 void UpdateESDtrack(ULong_t flags) const;
e43c066c 59
1aedd96e 60 AliESDtrack *GetESDtrack() const {return fESDtrack;}
e43c066c 61
006b5f7f 62 Int_t GetDetectorIndex() const {return GetLabel();}
7f6ddf58 63 Double_t GetdEdx() const {return fdEdx;}
83d73500 64 Double_t GetPIDsignal() const {return GetdEdx();}
6c94f330 65 Double_t GetC() const {return AliExternalTrackParam::GetC(GetBz());}
66 Double_t GetD(Double_t x, Double_t y) const {
67 return AliExternalTrackParam::GetD(x,y,GetBz());
68 }
69 void GetDZ(Double_t xv, Double_t yv, Double_t zv, Float_t dz[2]) const {
70 return AliExternalTrackParam::GetDZ(xv,yv,zv,GetBz(),dz);
71 }
72
e50912db 73 Bool_t GetGlobalXYZat(Double_t xloc,Double_t &x,Double_t &y,Double_t &z) const;
8602c008 74 Bool_t GetPhiZat(Double_t r,Double_t &phi,Double_t &z) const;
e50912db 75 Bool_t GetLocalXat(Double_t r,Double_t &xloc) const;
6c94f330 76
006b5f7f 77 Int_t Compare(const TObject *o) const;
006b5f7f 78 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
ae00569a 79 void SetModuleIndex(Int_t ilayer,Int_t idx) {fModule[ilayer]=idx;}
80 Int_t GetModuleIndex(Int_t ilayer) const {return fModule[ilayer];}
81 void SetModuleIndexInfo(Int_t ilayer,Int_t idet,Int_t status=1,Float_t xloc=0,Float_t zloc=0);
82 Bool_t GetModuleIndexInfo(Int_t ilayer,Int_t &idet,Int_t &status,Float_t &xloc,Float_t &zloc) const;
6c94f330 83 Bool_t Invariant() const;
ef7253ac 84
ae00569a 85 void SetExtraCluster(Int_t ilayer, Int_t idx) {fIndex[AliITSgeomTGeo::kNLayers+ilayer]=idx;}
86 Int_t GetExtraCluster(Int_t ilayer) const {return fIndex[AliITSgeomTGeo::kNLayers+ilayer];}
87
88 void SetExtraModule(Int_t ilayer, Int_t idx) {fModule[AliITSgeomTGeo::kNLayers+ilayer]=idx;}
89 Int_t GetExtraModule(Int_t ilayer) const {return fModule[AliITSgeomTGeo::kNLayers+ilayer];}
c84a5e9e 90
6c94f330 91protected:
92 Double_t GetBz() const ;
93 Double_t fdEdx; // dE/dx
8602c008 94
95 static const Int_t fgkWARN; //! used for debugging purposes
6c94f330 96 Float_t fdEdxSample[4]; // array of dE/dx samples b.b.
15dd636f 97
e50912db 98 Int_t fIndex[2*AliITSgeomTGeo::kNLayers]; // indices of associated clusters
15dd636f 99
ae00569a 100 Int_t fModule[2*AliITSgeomTGeo::kNLayers]; // indices of crossed modules:
101 // see SetModuleIndexInfo()
ef7253ac 102 AliESDtrack *fESDtrack; //! pointer to the connected ESD track
006b5f7f 103
6c94f330 104private:
105 AliITStrackV2 &operator=(const AliITStrackV2 &tr);
8602c008 106 ClassDef(AliITStrackV2,7) //ITS reconstructed track
6c94f330 107};
a9a2d814 108
ae00569a 109inline void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
23efe5f1 110 //----------------------------------------------------------------------
a9a2d814 111 // This function stores dEdx sample corrected for the track segment length
112 // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
23efe5f1 113 //----------------------------------------------------------------------
a9a2d814 114 if (i<0) return;
115 if (i>3) return;
23efe5f1 116 Double_t s=GetSnp(), t=GetTgl();
23efe5f1 117 q *= TMath::Sqrt((1-s*s)/(1+t*t));
118 fdEdxSample[i]=q;
ae00569a 119 return;
23efe5f1 120}
c84a5e9e 121
ae00569a 122inline void AliITStrackV2::SetModuleIndexInfo(Int_t ilayer,Int_t idet,Int_t status,
123 Float_t xloc,Float_t zloc) {
124 //----------------------------------------------------------------------
125 // This function encodes in the module number also the status of cluster association
126 // "status" can have the following values:
127 // 1 "found" (cluster is associated),
128 // 2 "dead" (module is dead from OCDB),
129 // 3 "skipped" (module or layer forced to be skipped),
130 // 4 "outinz" (track out of z acceptance),
131 // 5 "nocls" (no clusters in the road),
132 // 6 "norefit" (cluster rejected during refit)
133 // 7 "deadzspd" (holes in z in SPD)
134 // WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!
135 //----------------------------------------------------------------------
136
137 if(idet<0) {
138 idet=0;
139 } else {
140 // same detector numbering as in AliITSCalib classes
141 if(ilayer==1) idet+=AliITSgeomTGeo::GetNLadders(1)*AliITSgeomTGeo::GetNDetectors(1);
142 if(ilayer==3) idet+=AliITSgeomTGeo::GetNLadders(3)*AliITSgeomTGeo::GetNDetectors(3);
143 if(ilayer==5) idet+=AliITSgeomTGeo::GetNLadders(5)*AliITSgeomTGeo::GetNDetectors(5);
144 }
145
146 Int_t xInt = Int_t(xloc*10.);
147 Int_t zInt = Int_t(zloc*10.);
148
5af4a2d0 149 if(TMath::Abs(xloc*10.-(Float_t)xInt)>0.5){
150 if(zloc>0) {
151 xInt++;
152 }
153 else {
154 xInt--;
155 }
156 }
157 if(TMath::Abs(zloc*10.-(Float_t)zInt)>0.5){
158 if(zloc>0) {
159 zInt++;
160 }
161 else {
162 zInt--;
163 }
164 }
ae00569a 165 Int_t signs=0;
166 if(xInt>=0 && zInt>=0) signs=10000;
167 if(xInt>=0 && zInt<0) signs=20000;
168 if(xInt<0 && zInt>=0) signs=30000;
169 if(xInt<0 && zInt<0) signs=40000;
170
171 Int_t modindex = signs;
172
173 modindex += TMath::Abs(zInt);
174 modindex += TMath::Abs(xInt)*100;
175
176 modindex += status*100000;
177
178 modindex += idet*1000000;
179
180 SetModuleIndex(ilayer,modindex);
181 return;
182}
183
184inline Bool_t AliITStrackV2::GetModuleIndexInfo(Int_t ilayer,Int_t &idet,Int_t &status,
185 Float_t &xloc,Float_t &zloc) const {
186 //----------------------------------------------------------------------
187 // This function encodes in the module number also the status of cluster association
188 // "status" can have the following values:
189 // 1 "found" (cluster is associated),
190 // 2 "dead" (module is dead from OCDB),
191 // 3 "skipped" (module or layer forced to be skipped),
192 // 4 "outinz" (track out of z acceptance),
193 // 5 "nocls" (no clusters in the road),
194 // 6 "norefit" (cluster rejected during refit),
195 // 7 "deadzspd" (holes in z in SPD)
196 // Also given are the coordinates of the crossing point of track and module
197 // (in the local module ref. system)
198 // WARNING: THIS METHOD HAS TO BE SYNCHRONIZED WITH AliESDtrack::GetITSModuleIndexInfo()!
199 //----------------------------------------------------------------------
200
201
202 if(fModule[ilayer]==-1) {
203 AliError("fModule was not set !");
204 idet = -1;
205 status=0;
206 xloc=-99.; zloc=-99.;
207 return kFALSE;
208 }
209
210 Int_t module = fModule[ilayer];
211
212 idet = Int_t(module/1000000);
213
214 module -= idet*1000000;
215
216 status = Int_t(module/100000);
217
218 module -= status*100000;
219
220 Int_t signs = Int_t(module/10000);
221
222 module-=signs*10000;
223
224 Int_t xInt = Int_t(module/100);
225 module -= xInt*100;
226
227 Int_t zInt = module;
228
229 if(signs==1) { xInt*=1; zInt*=1; }
230 if(signs==2) { xInt*=1; zInt*=-1; }
231 if(signs==3) { xInt*=-1; zInt*=1; }
232 if(signs==4) { xInt*=-1; zInt*=-1; }
233
234 xloc = 0.1*(Float_t)xInt;
235 zloc = 0.1*(Float_t)zInt;
236
237 if(status==4) idet = -1;
238
239 return kTRUE;
240}
241
242
006b5f7f 243#endif
244
245