define roads dynamically when attaching clusters based on
[u/mrichter/AliRoot.git] / TRD / AliTRDseedV1.h
CommitLineData
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// //
3e778975 10// The TRD offline tracklet //
e4f2f73d 11// //
12////////////////////////////////////////////////////////////////////////////
13
3e778975 14#ifndef ALITRDTRACKLETBASE_H
15#include "AliTRDtrackletBase.h"
e3cf3d02 16#endif
17
18#ifndef ROOT_TMath
19#include "TMath.h"
e4f2f73d 20#endif
21
ae4e8b84 22#ifndef ALITRDGEOMETRY_H
23#include "AliTRDgeometry.h"
24#endif
25
0906e73e 26#ifndef ALIPID_H
27#include "AliPID.h"
28#endif
29
e4f2f73d 30#ifndef ALIRIEMAN_H
31#include "AliRieman.h"
32#endif
33
f29f13a6 34#ifndef ALITRDCLUSTER_H
35#include "AliTRDcluster.h"
36#endif
37
e4f2f73d 38class TTreeSRedirector;
39
40class AliRieman;
41
eb38ed55 42class AliTRDtrackingChamber;
f3d3af1b 43class AliTRDtrackV1;
3a039a31 44class AliTRDReconstructor;
eb2b4f91 45class AliTRDpadPlane;
3e778975 46class AliTRDseedV1 : public AliTRDtrackletBase
47{
e3cf3d02 48public:
49 enum ETRDtrackletBuffers {
8d2bec9e 50 kNtb = 31 // max clusters/pad row
51 ,kNclusters = 2*kNtb // max number of clusters/tracklet
52 ,kNslices = 10 // max dEdx slices
e44586fb 53 };
e3cf3d02 54
2e2915e7 55 // bits from 0-13 are reserved by ROOT (see TObject.h)
e3cf3d02 56 enum ETRDtrackletStatus {
f29f13a6 57 kOwner = BIT(14) // owner of its clusters
58 ,kRowCross = BIT(15) // pad row cross tracklet
e20bef2b 59 ,kPID = BIT(16) // PID contributor
60 ,kCalib = BIT(17) // calibrated tracklet
61 ,kKink = BIT(18) // kink prolongation tracklet
1fd9389f 62 ,kStandAlone = BIT(19) // tracklet build during stand alone track finding
e44586fb 63 };
64
ae4e8b84 65 AliTRDseedV1(Int_t det = -1);
e44586fb 66 ~AliTRDseedV1();
67 AliTRDseedV1(const AliTRDseedV1 &ref);
68 AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
69
1fd9389f 70 Bool_t AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt = kFALSE);
203967fc 71 void Bootstrap(const AliTRDReconstructor *rec);
e3cf3d02 72 void Calibrate();
203967fc 73 void CookdEdx(Int_t nslices);
e3cf3d02 74 void CookLabels();
3e778975 75 Bool_t CookPID();
b72f4eaf 76 Bool_t Fit(Bool_t tilt=kFALSE, Bool_t zcorr=kFALSE);
203967fc 77 Bool_t Init(AliTRDtrackV1 *track);
e44586fb 78 inline void Init(const AliRieman *fit);
203967fc 79 Bool_t IsEqual(const TObject *inTracklet) const;
e3cf3d02 80 Bool_t IsCalibrated() const { return TestBit(kCalib);}
e44586fb 81 Bool_t IsOwner() const { return TestBit(kOwner);}
f29f13a6 82 Bool_t IsKink() const { return TestBit(kKink);}
e20bef2b 83 Bool_t HasPID() const { return TestBit(kPID);}
3e778975 84 Bool_t IsOK() const { return GetN() > 4 && GetNUsed() < 4;}
e44586fb 85 Bool_t IsRowCross() const { return TestBit(kRowCross);}
f29f13a6 86 Bool_t IsUsable(Int_t i) const { return fClusters[i] && !fClusters[i]->IsUsed();}
87 Bool_t IsStandAlone() const { return TestBit(kStandAlone);}
e44586fb 88
e3cf3d02 89 Float_t GetC() const { return fC; }
90 Float_t GetChi2() const { return fChi2; }
91 inline Float_t GetChi2Z() const;
92 inline Float_t GetChi2Y() const;
f29f13a6 93 inline Float_t GetChi2Phi() const;
e44586fb 94 void GetCovAt(Double_t x, Double_t *cov) const;
d937ad7a 95 void GetCovXY(Double_t *cov) const { memcpy(cov, &fCov[0], 3*sizeof(Double_t));}
16cca13f 96 void GetCovRef(Double_t *cov) const { memcpy(cov, &fRefCov, 7*sizeof(Double_t));}
bb2db46c 97 static Double_t GetCovSqrt(Double_t *c, Double_t *d);
98 static Double_t GetCovInv(Double_t *c, Double_t *d);
203967fc 99 Float_t GetdX() const { return fdX;}
100 Float_t* GetdEdx() { return &fdEdx[0];}
0b433f72 101 Float_t GetdQdl(Int_t ic, Float_t *dx=0x0) const;
3e778975 102 Float_t GetdYdX() const { return fYfit[1]; }
103 Float_t GetdZdX() const { return fZref[1]; }
104 Int_t GetdY() const { return Int_t(GetY()/0.014);}
203967fc 105 Int_t GetDetector() const { return fDet;}
e3cf3d02 106 void GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const {
107 exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
8d2bec9e 108 AliTRDcluster* GetClusters(Int_t i) const { return i<0 || i>=kNclusters ? 0x0 : fClusters[i];}
109 Int_t GetIndexes(Int_t i) const{ return i<0 || i>=kNclusters ? -1 : fIndexes[i];}
e3cf3d02 110 Int_t GetLabels(Int_t i) const { return fLabels[i];}
0b433f72 111 Float_t GetMomentum(Float_t *err = 0x0) const;
3e778975 112 Int_t GetN() const { return (Int_t)fN&0x1f;}
113 Int_t GetN2() const { return GetN();}
114 Int_t GetNUsed() const { return Int_t((fN>>5)&0x1f);}
115 Int_t GetNShared() const { return Int_t((fN>>10)&0x1f);}
e44586fb 116 Float_t GetQuality(Bool_t kZcorr) const;
dd8059a8 117 Float_t GetPadLength() const { return fPad[0];}
118 Float_t GetPadWidth() const { return fPad[1];}
ae4e8b84 119 Int_t GetPlane() const { return AliTRDgeometry::GetLayer(fDet); }
120
3e778975 121 Float_t* GetProbability(Bool_t force=kFALSE);
b25a5e9e 122 Float_t GetPt() const { return fPt; }
3e778975 123 inline Double_t GetPID(Int_t is=-1) const;
e3cf3d02 124 Float_t GetS2Y() const { return fS2Y;}
125 Float_t GetS2Z() const { return fS2Z;}
126 Float_t GetSigmaY() const { return fS2Y > 0. ? TMath::Sqrt(fS2Y) : 0.2;}
127 Float_t GetSnp() const { return fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
1fd9389f 128 Float_t GetTgl() const { return fZref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
dd8059a8 129 Float_t GetTilt() const { return fPad[2];}
3e778975 130 UInt_t GetTrackletWord() const { return 0;}
b72f4eaf 131 UShort_t GetVolumeId() const;
e3cf3d02 132 Float_t GetX0() const { return fX0;}
133 Float_t GetX() const { return fX0 - fX;}
5a7a515d 134 Float_t GetY() const { return fYfit[0] - fYfit[1] * fX;}
b1957d3c 135 Double_t GetYat(Double_t x) const { return fYfit[0] - fYfit[1] * (fX0-x);}
1fd9389f 136 Float_t GetYfit(Int_t id) const { return fYfit[id];}
137 Float_t GetYref(Int_t id) const { return fYref[id];}
138 Float_t GetZ() const { return fZfit[0] - fZfit[1] * fX;}
b1957d3c 139 Double_t GetZat(Double_t x) const { return fZfit[0] - fZfit[1] * (fX0-x);}
1fd9389f 140 Float_t GetZfit(Int_t id) const { return fZfit[id];}
141 Float_t GetZref(Int_t id) const { return fZref[id];}
142 Int_t GetYbin() const { return Int_t(GetY()/0.016);}
143 Int_t GetZbin() const { return Int_t(GetZ()/fPad[0]);}
e3cf3d02 144
ae4e8b84 145 inline AliTRDcluster* NextCluster();
71ea19a3 146 inline AliTRDcluster* PrevCluster();
e44586fb 147 void Print(Option_t *o = "") const;
71ea19a3 148 inline void ResetClusterIter(Bool_t forward = kTRUE);
e3cf3d02 149 void Reset();
ae4e8b84 150
1fd9389f 151 void SetC(Float_t c) { fC = c;}
152 void SetChi2(Float_t chi2) { fChi2 = chi2;}
16cca13f 153 inline void SetCovRef(const Double_t *cov);
e3cf3d02 154 void SetIndexes(Int_t i, Int_t idx) { fIndexes[i] = idx; }
155 void SetLabels(Int_t *lbls) { memcpy(fLabels, lbls, 3*sizeof(Int_t)); }
e20bef2b 156 void SetKink(Bool_t k = kTRUE){ SetBit(kKink, k);}
157 void SetPID(Bool_t k = kTRUE) { SetBit(kPID, k);}
f29f13a6 158 void SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
b25a5e9e 159 void SetPt(Double_t pt) { fPt = pt;}
29b87567 160 void SetOwner();
eb2b4f91 161 void SetPadPlane(AliTRDpadPlane *p);
dd8059a8 162 void SetPadLength(Float_t l) { fPad[0] = l;}
163 void SetPadWidth(Float_t w) { fPad[1] = w;}
cbe97468 164 void SetTilt(Float_t tilt) { fPad[2] = tilt; }
203967fc 165 void SetDetector(Int_t d) { fDet = d; }
bee2b41e 166 void SetDX(Float_t inDX) { fdX = inDX;}
3a039a31 167 void SetReconstructor(const AliTRDReconstructor *rec) {fReconstructor = rec;}
e3cf3d02 168 void SetX0(Float_t x0) { fX0 = x0; }
169 void SetYref(Int_t i, Float_t y) { fYref[i] = y;}
170 void SetZref(Int_t i, Float_t z) { fZref[i] = z;}
f29f13a6 171// void SetUsabilityMap(Long_t um) { fUsable = um; }
16cca13f 172 void Update(const AliTRDtrackV1* trk);
e3cf3d02 173 void UpdateUsed();
174 void UseClusters();
e4f2f73d 175
d937ad7a 176protected:
3e778975 177 void Copy(TObject &ref) const;
e4f2f73d 178
e44586fb 179private:
3e778975 180 inline void SetN(Int_t n);
181 inline void SetNUsed(Int_t n);
182 inline void SetNShared(Int_t n);
183
0ae89c5d 184 const AliTRDReconstructor *fReconstructor;//! local reconstructor
e3cf3d02 185 AliTRDcluster **fClusterIter; //! clusters iterator
8d2bec9e 186 Int_t fIndexes[kNclusters]; //! Indexes
e3cf3d02 187 Float_t fExB; //! tg(a_L) @ tracklet location
188 Float_t fVD; //! drift velocity @ tracklet location
189 Float_t fT0; //! time 0 @ tracklet location
190 Float_t fS2PRF; //! sigma^2 PRF for xd->0 and phi=a_L
191 Float_t fDiffL; //! longitudinal diffusion coefficient
192 Float_t fDiffT; //! transversal diffusion coefficient
71ea19a3 193 Char_t fClusterIdx; //! clusters iterator
dd8059a8 194 UShort_t fN; // number of clusters attached/used/shared
e3cf3d02 195 Short_t fDet; // TRD detector
8d2bec9e 196 AliTRDcluster *fClusters[kNclusters]; // Clusters
dd8059a8 197 Float_t fPad[3]; // local pad definition : length/width/tilt
1fd9389f 198 Float_t fYref[2]; // Reference y, dydx
199 Float_t fZref[2]; // Reference z, dz/dx
200 Float_t fYfit[2]; // Fit y, dy/dx
201 Float_t fZfit[2]; // Fit z
16cca13f 202 Float_t fPt; // Pt estimate @ tracklet [GeV/c]
e44586fb 203 Float_t fdX; // length of time bin
e3cf3d02 204 Float_t fX0; // anode wire position
205 Float_t fX; // radial position of the tracklet
206 Float_t fY; // r-phi position of the tracklet
207 Float_t fZ; // z position of the tracklet
208 Float_t fS2Y; // estimated resolution in the r-phi direction
209 Float_t fS2Z; // estimated resolution in the z direction
210 Float_t fC; // Curvature
211 Float_t fChi2; // Global chi2
8d2bec9e 212 Float_t fdEdx[kNslices]; // dE/dx measurements for tracklet
1fd9389f 213 Float_t fProb[AliPID::kSPECIES]; // PID probabilities
e3cf3d02 214 Int_t fLabels[3]; // most frequent MC labels and total number of different labels
16cca13f 215 Double_t fRefCov[7]; // covariance matrix of the track in the yz plane + the rest of the diagonal elements
d937ad7a 216 Double_t fCov[3]; // covariance matrix of the tracklet in the xy plane
e4f2f73d 217
16cca13f 218 ClassDef(AliTRDseedV1, 7) // The offline TRD tracklet
e4f2f73d 219};
220
221//____________________________________________________________
e3cf3d02 222inline Float_t AliTRDseedV1::GetChi2Z() const
e4f2f73d 223{
e3cf3d02 224 Double_t dz = fZref[0]-fZfit[0]; dz*=dz;
225 Double_t cov[3]; GetCovAt(fX, cov);
226 Double_t s2 = fRefCov[2]+cov[2];
227 return s2 > 0. ? dz/s2 : 0.;
e4f2f73d 228}
229
230//____________________________________________________________
e3cf3d02 231inline Float_t AliTRDseedV1::GetChi2Y() const
e4f2f73d 232{
e3cf3d02 233 Double_t dy = fYref[0]-fYfit[0]; dy*=dy;
234 Double_t cov[3]; GetCovAt(fX, cov);
235 Double_t s2 = fRefCov[0]+cov[0];
236 return s2 > 0. ? dy/s2 : 0.;
e4f2f73d 237}
238
239//____________________________________________________________
f29f13a6 240inline Float_t AliTRDseedV1::GetChi2Phi() const
241{
242 Double_t dphi = fYref[1]-fYfit[1]; dphi*=dphi;
243 Double_t cov[3]; GetCovAt(fX, cov);
244 Double_t s2 = fRefCov[2]+cov[2];
245 return s2 > 0. ? dphi/s2 : 0.;
246}
247
16cca13f 248
249
250//____________________________________________________________
3e778975 251inline Double_t AliTRDseedV1::GetPID(Int_t is) const
252{
253 if(is<0) return fProb[AliPID::kElectron];
254 if(is<AliPID::kSPECIES) return fProb[is];
255 return 0.;
256}
257
258//____________________________________________________________
0906e73e 259inline void AliTRDseedV1::Init(const AliRieman *rieman)
e4f2f73d 260{
e44586fb 261 fZref[0] = rieman->GetZat(fX0);
262 fZref[1] = rieman->GetDZat(fX0);
263 fYref[0] = rieman->GetYat(fX0);
264 fYref[1] = rieman->GetDYat(fX0);
8a7ff53c 265 fRefCov[0] = rieman->GetErrY(fX0);
266 fRefCov[2] = rieman->GetErrZ(fX0);
55ef6967 267 fC = rieman->GetC();
268 fChi2 = rieman->GetChi2();
e4f2f73d 269}
270
ae4e8b84 271//____________________________________________________________
272inline AliTRDcluster* AliTRDseedV1::NextCluster()
273{
71ea19a3 274// Mimic the usage of STL iterators.
275// Forward iterator
276
ae4e8b84 277 fClusterIdx++; fClusterIter++;
8d2bec9e 278 while(fClusterIdx < kNclusters){
71ea19a3 279 if(!(*fClusterIter)){
280 fClusterIdx++;
281 fClusterIter++;
282 continue;
283 }
284 return *fClusterIter;
285 }
286 return 0x0;
287}
288
289//____________________________________________________________
290inline AliTRDcluster* AliTRDseedV1::PrevCluster()
291{
292// Mimic the usage of STL iterators.
293// Backward iterator
294
295 fClusterIdx--; fClusterIter--;
296 while(fClusterIdx >= 0){
297 if(!(*fClusterIter)){
298 fClusterIdx--;
299 fClusterIter--;
300 continue;
301 }
302 return *fClusterIter;
303 }
304 return 0x0;
305}
306
307//____________________________________________________________
308inline void AliTRDseedV1::ResetClusterIter(Bool_t forward)
309{
310// Mimic the usage of STL iterators.
311// Facilitate the usage of NextCluster for forward like
312// iterator (kTRUE) and PrevCluster for backward like iterator (kFALSE)
313
314 if(forward){
315 fClusterIter = &fClusters[0]; fClusterIter--;
316 fClusterIdx=-1;
317 } else {
8d2bec9e 318 fClusterIter = &fClusters[kNclusters-1]; fClusterIter++;
319 fClusterIdx=kNclusters;
71ea19a3 320 }
ae4e8b84 321}
322
3e778975 323//____________________________________________________________
16cca13f 324inline void AliTRDseedV1::SetCovRef(const Double_t *cov)
325{
326// Copy some "important" covariance matrix elements
327// var(y)
328// cov(y,z) var(z)
329// var(snp)
330// var(tgl)
331// cov(tgl, 1/pt) var(1/pt)
332
333 memcpy(&fRefCov[0], cov, 3*sizeof(Double_t)); // yz full covariance
334 fRefCov[3] = cov[ 5]; // snp variance
335 fRefCov[4] = cov[ 9]; // tgl variance
336 fRefCov[5] = cov[13]; // cov(tgl, 1/pt)
337 fRefCov[6] = cov[14]; // 1/pt variance
338}
339
340
341//____________________________________________________________
3e778975 342inline void AliTRDseedV1::SetN(Int_t n)
343{
344 if(n<0 || n>= (1<<5)) return;
345 fN &= ~0x1f;
346 fN |= n;
347}
348
349//____________________________________________________________
350inline void AliTRDseedV1::SetNUsed(Int_t n)
351{
352 if(n<0 || n>= (1<<5)) return;
353 fN &= ~(0x1f<<5);
354 n <<= 5; fN |= n;
355}
356
357//____________________________________________________________
358inline void AliTRDseedV1::SetNShared(Int_t n)
359{
360 if(n<0 || n>= (1<<5)) return;
361 fN &= ~(0x1f<<10);
362 n <<= 10; fN |= n;
363}
364
365
e4f2f73d 366#endif
367
47d5d320 368
6e49cfdb 369