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[u/mrichter/AliRoot.git] / TRD / AliTRDseedV1.h
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e4f2f73d 1#ifndef ALITRDSEEDV1_H
2#define ALITRDSEEDV1_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
e44586fb 4* See cxx source for full Copyright notice */
e4f2f73d 5
6/* $Id$ */
7
8////////////////////////////////////////////////////////////////////////////
9// //
ee8fb199 10// \class AliTRDseedV1
11// \brief The TRD offline tracklet
12// \author Alexandru Bercuci
e4f2f73d 13// //
14////////////////////////////////////////////////////////////////////////////
15
3e778975 16#ifndef ALITRDTRACKLETBASE_H
17#include "AliTRDtrackletBase.h"
e3cf3d02 18#endif
19
20#ifndef ROOT_TMath
21#include "TMath.h"
e4f2f73d 22#endif
23
ae4e8b84 24#ifndef ALITRDGEOMETRY_H
25#include "AliTRDgeometry.h"
26#endif
27
0906e73e 28#ifndef ALIPID_H
29#include "AliPID.h"
30#endif
31
e4f2f73d 32
f29f13a6 33#ifndef ALITRDCLUSTER_H
34#include "AliTRDcluster.h"
35#endif
36
d07eec70 37
e4f2f73d 38class TTreeSRedirector;
f301a656 39class TLinearFitter;
e4f2f73d 40
41class AliRieman;
42
4ecadb52 43class AliTRDReconstructor;
eb38ed55 44class AliTRDtrackingChamber;
f3d3af1b 45class AliTRDtrackV1;
eb2b4f91 46class AliTRDpadPlane;
3e778975 47class AliTRDseedV1 : public AliTRDtrackletBase
48{
4ecadb52 49 friend class AliHLTTRDTracklet; // wrapper for HLT
3044dfe5 50
e3cf3d02 51public:
52 enum ETRDtrackletBuffers {
980d5a2a 53 kNbits = 6 // bits to store number of clusters
54 ,kMask = 0x3f // bit mask
55 ,kNtb = 31 // max clusters/pad row
8d2bec9e 56 ,kNclusters = 2*kNtb // max number of clusters/tracklet
57 ,kNslices = 10 // max dEdx slices
e44586fb 58 };
e3cf3d02 59
2e2915e7 60 // bits from 0-13 are reserved by ROOT (see TObject.h)
e3cf3d02 61 enum ETRDtrackletStatus {
f29f13a6 62 kOwner = BIT(14) // owner of its clusters
63 ,kRowCross = BIT(15) // pad row cross tracklet
e20bef2b 64 ,kPID = BIT(16) // PID contributor
65 ,kCalib = BIT(17) // calibrated tracklet
66 ,kKink = BIT(18) // kink prolongation tracklet
1fd9389f 67 ,kStandAlone = BIT(19) // tracklet build during stand alone track finding
2eb10c34 68 ,kPrimary = BIT(20) // tracklet from a primary track candidate
e44586fb 69 };
2eb10c34 70
71 enum ETRDtrackletError { // up to 8 bits
72 kAttachClFound = 0 // not enough clusters found
73 ,kAttachRowGap = 1 // found gap attached rows
74 ,kAttachRow = 2 // found 3 rows
75 ,kAttachMultipleCl= 3// multiple clusters attached to time bin
76 ,kAttachClAttach= 4 // not enough clusters attached
77 ,kFitCl = 5 // not enough clusters for fit
78 ,kFitFailedY = 6 // fit failed in XY plane failed
79 ,kFitFailedZ = 7 // fit in the QZ plane failed
7c3eecb8 80 };
e44586fb 81
ae4e8b84 82 AliTRDseedV1(Int_t det = -1);
e44586fb 83 ~AliTRDseedV1();
84 AliTRDseedV1(const AliTRDseedV1 &ref);
85 AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
86
9dcc64cc 87 Bool_t AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt = kFALSE, Bool_t ChgPlus=kTRUE, Int_t ev=-1);
203967fc 88 void Bootstrap(const AliTRDReconstructor *rec);
e3cf3d02 89 void Calibrate();
203967fc 90 void CookdEdx(Int_t nslices);
e3cf3d02 91 void CookLabels();
3e778975 92 Bool_t CookPID();
2eb10c34 93 Bool_t Fit(UChar_t opt=0);
9dcc64cc 94 Bool_t FitRobust(Bool_t ChgPlus=kTRUE);
203967fc 95 Bool_t Init(AliTRDtrackV1 *track);
4ecadb52 96 void Init(const AliRieman *fit);
203967fc 97 Bool_t IsEqual(const TObject *inTracklet) const;
e3cf3d02 98 Bool_t IsCalibrated() const { return TestBit(kCalib);}
e44586fb 99 Bool_t IsOwner() const { return TestBit(kOwner);}
f29f13a6 100 Bool_t IsKink() const { return TestBit(kKink);}
2eb10c34 101 Bool_t IsPrimary() const { return TestBit(kPrimary);}
e20bef2b 102 Bool_t HasPID() const { return TestBit(kPID);}
2eb10c34 103 Bool_t HasError(ETRDtrackletError err) const
104 { return TESTBIT(fErrorMsg, err);}
3e778975 105 Bool_t IsOK() const { return GetN() > 4 && GetNUsed() < 4;}
e44586fb 106 Bool_t IsRowCross() const { return TestBit(kRowCross);}
f29f13a6 107 Bool_t IsUsable(Int_t i) const { return fClusters[i] && !fClusters[i]->IsUsed();}
108 Bool_t IsStandAlone() const { return TestBit(kStandAlone);}
e44586fb 109
2eb10c34 110 Float_t GetAnodeWireOffset(Float_t zt);
68f9b6bd 111 Float_t GetC(Int_t typ=0) const { return fC[typ]; }
9dcc64cc 112 Float_t GetCharge(Bool_t useOutliers=kFALSE) const;
e3cf3d02 113 Float_t GetChi2() const { return fChi2; }
114 inline Float_t GetChi2Z() const;
115 inline Float_t GetChi2Y() const;
f29f13a6 116 inline Float_t GetChi2Phi() const;
e44586fb 117 void GetCovAt(Double_t x, Double_t *cov) const;
d937ad7a 118 void GetCovXY(Double_t *cov) const { memcpy(cov, &fCov[0], 3*sizeof(Double_t));}
16cca13f 119 void GetCovRef(Double_t *cov) const { memcpy(cov, &fRefCov, 7*sizeof(Double_t));}
66765e8e 120 static Int_t GetCovSqrt(const Double_t * const c, Double_t *d);
4d6aee34 121 static Double_t GetCovInv(const Double_t * const c, Double_t *d);
7c3eecb8 122 UChar_t GetErrorMsg() const { return fErrorMsg;}
203967fc 123 Float_t GetdX() const { return fdX;}
4d6aee34 124 const Float_t* GetdEdx() const { return &fdEdx[0];}
9dcc64cc 125 Float_t GetdQdl() const;
4d6aee34 126 Float_t GetdQdl(Int_t ic, Float_t *dx=NULL) const;
2eb10c34 127 Float_t GetdYdX() const { return fYfit[1];}
128 Float_t GetdZdX() const { return fZfit[1];}
3e778975 129 Int_t GetdY() const { return Int_t(GetY()/0.014);}
203967fc 130 Int_t GetDetector() const { return fDet;}
e3cf3d02 131 void GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const {
132 exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
4d6aee34 133 AliTRDcluster* GetClusters(Int_t i) const { return i<0 || i>=kNclusters ? NULL: fClusters[i];}
e1bcf0af 134 Bool_t GetEstimatedCrossPoint(Float_t &x, Float_t &z) const;
8d2bec9e 135 Int_t GetIndexes(Int_t i) const{ return i<0 || i>=kNclusters ? -1 : fIndexes[i];}
e3cf3d02 136 Int_t GetLabels(Int_t i) const { return fLabels[i];}
4d6aee34 137 Float_t GetMomentum(Float_t *err = NULL) const;
980d5a2a 138 Int_t GetN() const { return (Int_t)fN&kMask;}
3e778975 139 Int_t GetN2() const { return GetN();}
980d5a2a 140 Int_t GetNUsed() const { return Int_t((fN>>kNbits)&kMask);}
141 Int_t GetNShared() const { return Int_t(((fN>>kNbits)>>kNbits)&kMask);}
b453ef55 142 Float_t GetOccupancyTB() const;
e44586fb 143 Float_t GetQuality(Bool_t kZcorr) const;
dd8059a8 144 Float_t GetPadLength() const { return fPad[0];}
145 Float_t GetPadWidth() const { return fPad[1];}
ae4e8b84 146 Int_t GetPlane() const { return AliTRDgeometry::GetLayer(fDet); }
147
3e778975 148 Float_t* GetProbability(Bool_t force=kFALSE);
b25a5e9e 149 Float_t GetPt() const { return fPt; }
3e778975 150 inline Double_t GetPID(Int_t is=-1) const;
e3cf3d02 151 Float_t GetS2Y() const { return fS2Y;}
152 Float_t GetS2Z() const { return fS2Z;}
153 Float_t GetSigmaY() const { return fS2Y > 0. ? TMath::Sqrt(fS2Y) : 0.2;}
154 Float_t GetSnp() const { return fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
1fd9389f 155 Float_t GetTgl() const { return fZref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
dd8059a8 156 Float_t GetTilt() const { return fPad[2];}
3e778975 157 UInt_t GetTrackletWord() const { return 0;}
b72f4eaf 158 UShort_t GetVolumeId() const;
e3cf3d02 159 Float_t GetX0() const { return fX0;}
160 Float_t GetX() const { return fX0 - fX;}
5a7a515d 161 Float_t GetY() const { return fYfit[0] - fYfit[1] * fX;}
b1957d3c 162 Double_t GetYat(Double_t x) const { return fYfit[0] - fYfit[1] * (fX0-x);}
1fd9389f 163 Float_t GetYfit(Int_t id) const { return fYfit[id];}
164 Float_t GetYref(Int_t id) const { return fYref[id];}
165 Float_t GetZ() const { return fZfit[0] - fZfit[1] * fX;}
b1957d3c 166 Double_t GetZat(Double_t x) const { return fZfit[0] - fZfit[1] * (fX0-x);}
1fd9389f 167 Float_t GetZfit(Int_t id) const { return fZfit[id];}
168 Float_t GetZref(Int_t id) const { return fZref[id];}
169 Int_t GetYbin() const { return Int_t(GetY()/0.016);}
170 Int_t GetZbin() const { return Int_t(GetZ()/fPad[0]);}
e3cf3d02 171
ae4e8b84 172 inline AliTRDcluster* NextCluster();
71ea19a3 173 inline AliTRDcluster* PrevCluster();
e44586fb 174 void Print(Option_t *o = "") const;
71ea19a3 175 inline void ResetClusterIter(Bool_t forward = kTRUE);
980d5a2a 176 void Reset(Option_t *opt="");
ae4e8b84 177
68f9b6bd 178 void SetC(Float_t c, Int_t typ=0) { fC[typ] = c;}
1fd9389f 179 void SetChi2(Float_t chi2) { fChi2 = chi2;}
16cca13f 180 inline void SetCovRef(const Double_t *cov);
2eb10c34 181 void SetErrorMsg(ETRDtrackletError err) { SETBIT(fErrorMsg, err);}
e3cf3d02 182 void SetIndexes(Int_t i, Int_t idx) { fIndexes[i] = idx; }
183 void SetLabels(Int_t *lbls) { memcpy(fLabels, lbls, 3*sizeof(Int_t)); }
e20bef2b 184 void SetKink(Bool_t k = kTRUE){ SetBit(kKink, k);}
2eb10c34 185 void SetPrimary(Bool_t k = kTRUE){ SetBit(kPrimary, k);}
e20bef2b 186 void SetPID(Bool_t k = kTRUE) { SetBit(kPID, k);}
f29f13a6 187 void SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
b25a5e9e 188 void SetPt(Double_t pt) { fPt = pt;}
29b87567 189 void SetOwner();
4ecadb52 190 void SetPadPlane(AliTRDpadPlane * const p);
dd8059a8 191 void SetPadLength(Float_t l) { fPad[0] = l;}
192 void SetPadWidth(Float_t w) { fPad[1] = w;}
cbe97468 193 void SetTilt(Float_t tilt) { fPad[2] = tilt; }
203967fc 194 void SetDetector(Int_t d) { fDet = d; }
bee2b41e 195 void SetDX(Float_t inDX) { fdX = inDX;}
4d6aee34 196 void SetReconstructor(const AliTRDReconstructor *rec) {fkReconstructor = rec;}
e3cf3d02 197 void SetX0(Float_t x0) { fX0 = x0; }
198 void SetYref(Int_t i, Float_t y) { fYref[i] = y;}
199 void SetZref(Int_t i, Float_t z) { fZref[i] = z;}
f29f13a6 200// void SetUsabilityMap(Long_t um) { fUsable = um; }
16cca13f 201 void Update(const AliTRDtrackV1* trk);
e3cf3d02 202 void UpdateUsed();
203 void UseClusters();
e4f2f73d 204
d937ad7a 205protected:
3e778975 206 void Copy(TObject &ref) const;
e4f2f73d 207
e44586fb 208private:
3e778975 209 inline void SetN(Int_t n);
210 inline void SetNUsed(Int_t n);
211 inline void SetNShared(Int_t n);
4ecadb52 212 inline void Swap(Int_t &n1, Int_t &n2) const;
213 inline void Swap(Double_t &d1, Double_t &d2) const;
3e778975 214
4d6aee34 215 const AliTRDReconstructor *fkReconstructor;//! local reconstructor
e3cf3d02 216 AliTRDcluster **fClusterIter; //! clusters iterator
8d2bec9e 217 Int_t fIndexes[kNclusters]; //! Indexes
0323ef61 218 Float_t fExB; // tg(a_L) @ tracklet location
219 Float_t fVD; // drift velocity @ tracklet location
220 Float_t fT0; // time 0 @ tracklet location
221 Float_t fS2PRF; // sigma^2 PRF for xd->0 and phi=a_L
222 Float_t fDiffL; // longitudinal diffusion coefficient
223 Float_t fDiffT; // transversal diffusion coefficient
71ea19a3 224 Char_t fClusterIdx; //! clusters iterator
7c3eecb8 225 UChar_t fErrorMsg; // processing error
6ad5e6b2 226 UInt_t fN; // number of clusters attached/used/shared
e3cf3d02 227 Short_t fDet; // TRD detector
8d2bec9e 228 AliTRDcluster *fClusters[kNclusters]; // Clusters
2eb10c34 229 Float_t fPad[4]; // local pad definition : length/width/tilt/anode wire offset
1fd9389f 230 Float_t fYref[2]; // Reference y, dydx
231 Float_t fZref[2]; // Reference z, dz/dx
232 Float_t fYfit[2]; // Fit y, dy/dx
233 Float_t fZfit[2]; // Fit z
16cca13f 234 Float_t fPt; // Pt estimate @ tracklet [GeV/c]
e44586fb 235 Float_t fdX; // length of time bin
e3cf3d02 236 Float_t fX0; // anode wire position
237 Float_t fX; // radial position of the tracklet
238 Float_t fY; // r-phi position of the tracklet
239 Float_t fZ; // z position of the tracklet
240 Float_t fS2Y; // estimated resolution in the r-phi direction
241 Float_t fS2Z; // estimated resolution in the z direction
68f9b6bd 242 Float_t fC[2]; // Curvature for standalone [0] rieman [1] vertex constrained
e3cf3d02 243 Float_t fChi2; // Global chi2
8d2bec9e 244 Float_t fdEdx[kNslices]; // dE/dx measurements for tracklet
1fd9389f 245 Float_t fProb[AliPID::kSPECIES]; // PID probabilities
e3cf3d02 246 Int_t fLabels[3]; // most frequent MC labels and total number of different labels
16cca13f 247 Double_t fRefCov[7]; // covariance matrix of the track in the yz plane + the rest of the diagonal elements
d937ad7a 248 Double_t fCov[3]; // covariance matrix of the tracklet in the xy plane
e4f2f73d 249
c51f4ffb 250 ClassDef(AliTRDseedV1, 12) // The offline TRD tracklet
e4f2f73d 251};
252
253//____________________________________________________________
e3cf3d02 254inline Float_t AliTRDseedV1::GetChi2Z() const
e4f2f73d 255{
e3cf3d02 256 Double_t dz = fZref[0]-fZfit[0]; dz*=dz;
257 Double_t cov[3]; GetCovAt(fX, cov);
258 Double_t s2 = fRefCov[2]+cov[2];
259 return s2 > 0. ? dz/s2 : 0.;
e4f2f73d 260}
261
262//____________________________________________________________
e3cf3d02 263inline Float_t AliTRDseedV1::GetChi2Y() const
e4f2f73d 264{
e3cf3d02 265 Double_t dy = fYref[0]-fYfit[0]; dy*=dy;
266 Double_t cov[3]; GetCovAt(fX, cov);
267 Double_t s2 = fRefCov[0]+cov[0];
268 return s2 > 0. ? dy/s2 : 0.;
e4f2f73d 269}
270
271//____________________________________________________________
f29f13a6 272inline Float_t AliTRDseedV1::GetChi2Phi() const
273{
274 Double_t dphi = fYref[1]-fYfit[1]; dphi*=dphi;
275 Double_t cov[3]; GetCovAt(fX, cov);
276 Double_t s2 = fRefCov[2]+cov[2];
277 return s2 > 0. ? dphi/s2 : 0.;
278}
279
16cca13f 280
281
282//____________________________________________________________
3e778975 283inline Double_t AliTRDseedV1::GetPID(Int_t is) const
284{
285 if(is<0) return fProb[AliPID::kElectron];
286 if(is<AliPID::kSPECIES) return fProb[is];
287 return 0.;
288}
289
290//____________________________________________________________
ae4e8b84 291inline AliTRDcluster* AliTRDseedV1::NextCluster()
292{
71ea19a3 293// Mimic the usage of STL iterators.
294// Forward iterator
295
ae4e8b84 296 fClusterIdx++; fClusterIter++;
8d2bec9e 297 while(fClusterIdx < kNclusters){
71ea19a3 298 if(!(*fClusterIter)){
299 fClusterIdx++;
300 fClusterIter++;
301 continue;
302 }
303 return *fClusterIter;
304 }
4d6aee34 305 return NULL;
71ea19a3 306}
307
308//____________________________________________________________
309inline AliTRDcluster* AliTRDseedV1::PrevCluster()
310{
311// Mimic the usage of STL iterators.
312// Backward iterator
313
314 fClusterIdx--; fClusterIter--;
315 while(fClusterIdx >= 0){
316 if(!(*fClusterIter)){
317 fClusterIdx--;
318 fClusterIter--;
319 continue;
320 }
321 return *fClusterIter;
322 }
4d6aee34 323 return NULL;
71ea19a3 324}
325
326//____________________________________________________________
327inline void AliTRDseedV1::ResetClusterIter(Bool_t forward)
328{
329// Mimic the usage of STL iterators.
330// Facilitate the usage of NextCluster for forward like
331// iterator (kTRUE) and PrevCluster for backward like iterator (kFALSE)
332
333 if(forward){
334 fClusterIter = &fClusters[0]; fClusterIter--;
335 fClusterIdx=-1;
336 } else {
8d2bec9e 337 fClusterIter = &fClusters[kNclusters-1]; fClusterIter++;
338 fClusterIdx=kNclusters;
71ea19a3 339 }
ae4e8b84 340}
341
3e778975 342//____________________________________________________________
16cca13f 343inline void AliTRDseedV1::SetCovRef(const Double_t *cov)
344{
345// Copy some "important" covariance matrix elements
346// var(y)
347// cov(y,z) var(z)
348// var(snp)
349// var(tgl)
350// cov(tgl, 1/pt) var(1/pt)
351
352 memcpy(&fRefCov[0], cov, 3*sizeof(Double_t)); // yz full covariance
353 fRefCov[3] = cov[ 5]; // snp variance
354 fRefCov[4] = cov[ 9]; // tgl variance
355 fRefCov[5] = cov[13]; // cov(tgl, 1/pt)
356 fRefCov[6] = cov[14]; // 1/pt variance
357}
358
359
360//____________________________________________________________
3e778975 361inline void AliTRDseedV1::SetN(Int_t n)
362{
6ad5e6b2 363 if(n<0 || n>kNclusters) return;
980d5a2a 364 fN &= ~kMask;
365 fN |= (n&kMask);
3e778975 366}
367
368//____________________________________________________________
369inline void AliTRDseedV1::SetNUsed(Int_t n)
370{
6ad5e6b2 371 if(n<0 || n>kNclusters) return;
980d5a2a 372 UInt_t mask(kMask<<kNbits);
6ad5e6b2 373 fN &= ~mask;
980d5a2a 374 n=n<<kNbits; fN |= (n&mask);
3e778975 375}
376
377//____________________________________________________________
378inline void AliTRDseedV1::SetNShared(Int_t n)
379{
6ad5e6b2 380 if(n<0 || n>kNclusters) return;
980d5a2a 381 UInt_t mask((kMask<<kNbits)<<kNbits);
6ad5e6b2 382 fN &= ~mask;
980d5a2a 383 n = (n<<kNbits)<<kNbits; fN|=(n&mask);
3e778975 384}
385
560e5c05 386//____________________________________________________________
4ecadb52 387inline void AliTRDseedV1::Swap(Int_t &n1, Int_t &n2) const
560e5c05 388{
389// swap values of n1 with n2
390 Int_t tmp(n1);
391 n1=n2; n2=tmp;
392}
393
394//____________________________________________________________
4ecadb52 395inline void AliTRDseedV1::Swap(Double_t &d1, Double_t &d2) const
560e5c05 396{
397// swap values of d1 with d2
398 Double_t tmp(d1);
399 d1=d2; d2=tmp;
400}
401
3e778975 402
e4f2f73d 403#endif
404
47d5d320 405
6e49cfdb 406