#ifndef ALITRDSEEDV1_H
#define ALITRDSEEDV1_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
- * See cxx source for full Copyright notice */
+* See cxx source for full Copyright notice */
/* $Id$ */
////////////////////////////////////////////////////////////////////////////
// //
-// The TRD track seed //
+// \class AliTRDseedV1
+// \brief The TRD offline tracklet
+// \author Alexandru Bercuci
// //
////////////////////////////////////////////////////////////////////////////
-#ifndef ALITRDSEED_H
-#include "AliTRDseed.h"
+#ifndef ALITRDTRACKLETBASE_H
+#include "AliTRDtrackletBase.h"
+#endif
+
+#ifndef ROOT_TMath
+#include "TMath.h"
+#endif
+
+#ifndef ALITRDGEOMETRY_H
+#include "AliTRDgeometry.h"
+#endif
+
+#ifndef ALIPID_H
+#include "AliPID.h"
#endif
#ifndef ALIRIEMAN_H
#include "AliRieman.h"
#endif
+#ifndef ALITRDCLUSTER_H
+#include "AliTRDcluster.h"
+#endif
+
+#include "AliTRDReconstructor.h"
+
class TTreeSRedirector;
+class TLinearFitter;
class AliRieman;
-class AliTRDstackLayer;
-class AliTRDcluster;
-class AliTRDrecoParam;
-
-class AliTRDseedV1 : public AliTRDseed
+class AliTRDtrackingChamber;
+class AliTRDtrackV1;
+class AliTRDpadPlane;
+class AliTRDseedV1 : public AliTRDtrackletBase
{
+ friend class AliHLTTRDTracklet;
- public:
+public:
+ enum ETRDtrackletBuffers {
+ kNbits = 6 // bits to store number of clusters
+ ,kMask = 0x3f // bit mask
+ ,kNtb = 31 // max clusters/pad row
+ ,kNclusters = 2*kNtb // max number of clusters/tracklet
+ ,kNslices = 10 // max dEdx slices
+ };
- AliTRDseedV1(Int_t layer = -1, AliTRDrecoParam *p=0x0);
- ~AliTRDseedV1();
- AliTRDseedV1(const AliTRDseedV1 &ref, Bool_t owner=kFALSE);
- AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
+ // bits from 0-13 are reserved by ROOT (see TObject.h)
+ enum ETRDtrackletStatus {
+ kOwner = BIT(14) // owner of its clusters
+ ,kRowCross = BIT(15) // pad row cross tracklet
+ ,kPID = BIT(16) // PID contributor
+ ,kCalib = BIT(17) // calibrated tracklet
+ ,kKink = BIT(18) // kink prolongation tracklet
+ ,kStandAlone = BIT(19) // tracklet build during stand alone track finding
+ };
+ enum ETRDtrackletError {
+ kAttachClFound = 1 // not enough clusters found
+ ,kAttachRowGap // found gap attached rows
+ ,kAttachRow // found 3 rows
+ ,kAttachMultipleCl // multiple clusters attached to time bin
+ ,kAttachClAttach // not enough clusters attached
+ };
- Bool_t AttachClustersIter(AliTRDstackLayer *layer, Float_t quality, Bool_t kZcorr = kFALSE, AliTRDcluster *c=0x0);
- Bool_t AttachClustersProj(AliTRDstackLayer *layer, Float_t quality, Bool_t kZcorr = kFALSE, AliTRDcluster *c=0x0);
- static Float_t FitRiemanTilt(AliTRDseedV1 * cseed, Bool_t terror);
- Bool_t FitTracklet();
-
-// Bool_t AttachClusters(Double_t *dx, Float_t quality, Bool_t kZcorr=kFALSE, AliTRDcluster *c=0x0);
- inline Float_t GetChi2Z(const Float_t z = 0.) const;
- inline Float_t GetChi2Y(const Float_t y = 0.) const;
- Float_t GetQuality(Bool_t kZcorr) const;
- Int_t GetLayer() const { return fLayer; }
+ AliTRDseedV1(Int_t det = -1);
+ ~AliTRDseedV1();
+ AliTRDseedV1(const AliTRDseedV1 &ref);
+ AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
- inline void Update(const AliRieman *rieman);
- void Print(Option_t * /*o*/) const { }
- void Print();
+ Bool_t AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt = kFALSE);
+ void Bootstrap(const AliTRDReconstructor *rec);
+ void Calibrate();
+ void CookdEdx(Int_t nslices);
+ void CookLabels();
+ Bool_t CookPID();
+ Bool_t Fit(Bool_t tilt=kFALSE, Bool_t zcorr=kFALSE);
+ Bool_t Init(AliTRDtrackV1 *track);
+ inline void Init(const AliRieman *fit);
+ Bool_t IsEqual(const TObject *inTracklet) const;
+ Bool_t IsCalibrated() const { return TestBit(kCalib);}
+ Bool_t IsOwner() const { return TestBit(kOwner);}
+ Bool_t IsKink() const { return TestBit(kKink);}
+ Bool_t HasPID() const { return TestBit(kPID);}
+ Bool_t IsOK() const { return GetN() > 4 && GetNUsed() < 4;}
+ Bool_t IsRowCross() const { return TestBit(kRowCross);}
+ Bool_t IsUsable(Int_t i) const { return fClusters[i] && !fClusters[i]->IsUsed();}
+ Bool_t IsStandAlone() const { return TestBit(kStandAlone);}
- void SetLayer(Int_t l) { fLayer = l; }
- void SetNTimeBins(Int_t nTB) { fTimeBins = nTB; }
- void SetRecoParam(AliTRDrecoParam *p) { fRecoParam = p; }
+ Float_t GetC() const { return fC; }
+ Float_t GetChi2() const { return fChi2; }
+ inline Float_t GetChi2Z() const;
+ inline Float_t GetChi2Y() const;
+ inline Float_t GetChi2Phi() const;
+ void GetCovAt(Double_t x, Double_t *cov) const;
+ void GetCovXY(Double_t *cov) const { memcpy(cov, &fCov[0], 3*sizeof(Double_t));}
+ void GetCovRef(Double_t *cov) const { memcpy(cov, &fRefCov, 7*sizeof(Double_t));}
+ static Double_t GetCovSqrt(const Double_t * const c, Double_t *d);
+ static Double_t GetCovInv(const Double_t * const c, Double_t *d);
+ UChar_t GetErrorMsg() const { return fErrorMsg;}
+ Float_t GetdX() const { return fdX;}
+ const Float_t* GetdEdx() const { return &fdEdx[0];}
+ Float_t GetdQdl(Int_t ic, Float_t *dx=NULL) const;
+ Float_t GetdYdX() const { return fYfit[1]; }
+ Float_t GetdZdX() const { return fZref[1]; }
+ Int_t GetdY() const { return Int_t(GetY()/0.014);}
+ Int_t GetDetector() const { return fDet;}
+ void GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const {
+ exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
+ AliTRDcluster* GetClusters(Int_t i) const { return i<0 || i>=kNclusters ? NULL: fClusters[i];}
+ static TLinearFitter* GetFitterY();
+ static TLinearFitter* GetFitterZ();
+ Int_t GetIndexes(Int_t i) const{ return i<0 || i>=kNclusters ? -1 : fIndexes[i];}
+ Int_t GetLabels(Int_t i) const { return fLabels[i];}
+ Float_t GetMomentum(Float_t *err = NULL) const;
+ Int_t GetN() const { return (Int_t)fN&kMask;}
+ Int_t GetN2() const { return GetN();}
+ Int_t GetNUsed() const { return Int_t((fN>>kNbits)&kMask);}
+ Int_t GetNShared() const { return Int_t(((fN>>kNbits)>>kNbits)&kMask);}
+ Float_t GetQuality(Bool_t kZcorr) const;
+ Float_t GetPadLength() const { return fPad[0];}
+ Float_t GetPadWidth() const { return fPad[1];}
+ Int_t GetPlane() const { return AliTRDgeometry::GetLayer(fDet); }
- protected:
+ Float_t* GetProbability(Bool_t force=kFALSE);
+ Float_t GetPt() const { return fPt; }
+ inline Double_t GetPID(Int_t is=-1) const;
+ Float_t GetS2Y() const { return fS2Y;}
+ Float_t GetS2Z() const { return fS2Z;}
+ Float_t GetSigmaY() const { return fS2Y > 0. ? TMath::Sqrt(fS2Y) : 0.2;}
+ Float_t GetSnp() const { return fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
+ Float_t GetTgl() const { return fZref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
+ Float_t GetTilt() const { return fPad[2];}
+ UInt_t GetTrackletWord() const { return 0;}
+ UShort_t GetVolumeId() const;
+ Float_t GetX0() const { return fX0;}
+ Float_t GetX() const { return fX0 - fX;}
+ Float_t GetY() const { return fYfit[0] - fYfit[1] * fX;}
+ Double_t GetYat(Double_t x) const { return fYfit[0] - fYfit[1] * (fX0-x);}
+ Float_t GetYfit(Int_t id) const { return fYfit[id];}
+ Float_t GetYref(Int_t id) const { return fYref[id];}
+ Float_t GetZ() const { return fZfit[0] - fZfit[1] * fX;}
+ Double_t GetZat(Double_t x) const { return fZfit[0] - fZfit[1] * (fX0-x);}
+ Float_t GetZfit(Int_t id) const { return fZfit[id];}
+ Float_t GetZref(Int_t id) const { return fZref[id];}
+ Int_t GetYbin() const { return Int_t(GetY()/0.016);}
+ Int_t GetZbin() const { return Int_t(GetZ()/fPad[0]);}
- void Copy(TObject &ref) const;
+ inline AliTRDcluster* NextCluster();
+ inline AliTRDcluster* PrevCluster();
+ void Print(Option_t *o = "") const;
+ inline void ResetClusterIter(Bool_t forward = kTRUE);
+ void Reset(Option_t *opt="");
- private:
+ void SetC(Float_t c) { fC = c;}
+ void SetChi2(Float_t chi2) { fChi2 = chi2;}
+ inline void SetCovRef(const Double_t *cov);
+ void SetErrorMsg(Int_t err) { fErrorMsg = err;}
+ void SetIndexes(Int_t i, Int_t idx) { fIndexes[i] = idx; }
+ void SetLabels(Int_t *lbls) { memcpy(fLabels, lbls, 3*sizeof(Int_t)); }
+ void SetKink(Bool_t k = kTRUE){ SetBit(kKink, k);}
+ void SetPID(Bool_t k = kTRUE) { SetBit(kPID, k);}
+ void SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
+ void SetPt(Double_t pt) { fPt = pt;}
+ void SetOwner();
+ void SetPadPlane(AliTRDpadPlane *p);
+ void SetPadLength(Float_t l) { fPad[0] = l;}
+ void SetPadWidth(Float_t w) { fPad[1] = w;}
+ void SetTilt(Float_t tilt) { fPad[2] = tilt; }
+ void SetDetector(Int_t d) { fDet = d; }
+ void SetDX(Float_t inDX) { fdX = inDX;}
+ void SetReconstructor(const AliTRDReconstructor *rec) {fkReconstructor = rec;}
+ void SetX0(Float_t x0) { fX0 = x0; }
+ void SetYref(Int_t i, Float_t y) { fYref[i] = y;}
+ void SetZref(Int_t i, Float_t z) { fZref[i] = z;}
+// void SetUsabilityMap(Long_t um) { fUsable = um; }
+ void Update(const AliTRDtrackV1* trk);
+ void UpdateUsed();
+ void UseClusters();
- Int_t fLayer; // layer for this seed
- Int_t fTimeBins; // local copy of the DB info
- Bool_t fOwner; // owner of the clusters
- AliTRDrecoParam *fRecoParam; //! local copy of the reco params
+protected:
+ void Copy(TObject &ref) const;
- ClassDef(AliTRDseedV1, 1) // New TRD seed
+private:
+ inline void SetN(Int_t n);
+ inline void SetNUsed(Int_t n);
+ inline void SetNShared(Int_t n);
+ inline void Swap(Int_t &n1, Int_t &n2);
+ inline void Swap(Double_t &d1, Double_t &d2);
+ const AliTRDReconstructor *fkReconstructor;//! local reconstructor
+ AliTRDcluster **fClusterIter; //! clusters iterator
+ Int_t fIndexes[kNclusters]; //! Indexes
+ Float_t fExB; //! tg(a_L) @ tracklet location
+ Float_t fVD; //! drift velocity @ tracklet location
+ Float_t fT0; //! time 0 @ tracklet location
+ Float_t fS2PRF; //! sigma^2 PRF for xd->0 and phi=a_L
+ Float_t fDiffL; //! longitudinal diffusion coefficient
+ Float_t fDiffT; //! transversal diffusion coefficient
+ Char_t fClusterIdx; //! clusters iterator
+ UChar_t fErrorMsg; // processing error
+ UInt_t fN; // number of clusters attached/used/shared
+ Short_t fDet; // TRD detector
+ AliTRDcluster *fClusters[kNclusters]; // Clusters
+ Float_t fPad[3]; // local pad definition : length/width/tilt
+ Float_t fYref[2]; // Reference y, dydx
+ Float_t fZref[2]; // Reference z, dz/dx
+ Float_t fYfit[2]; // Fit y, dy/dx
+ Float_t fZfit[2]; // Fit z
+ Float_t fPt; // Pt estimate @ tracklet [GeV/c]
+ Float_t fdX; // length of time bin
+ Float_t fX0; // anode wire position
+ Float_t fX; // radial position of the tracklet
+ Float_t fY; // r-phi position of the tracklet
+ Float_t fZ; // z position of the tracklet
+ Float_t fS2Y; // estimated resolution in the r-phi direction
+ Float_t fS2Z; // estimated resolution in the z direction
+ Float_t fC; // Curvature
+ Float_t fChi2; // Global chi2
+ Float_t fdEdx[kNslices]; // dE/dx measurements for tracklet
+ Float_t fProb[AliPID::kSPECIES]; // PID probabilities
+ Int_t fLabels[3]; // most frequent MC labels and total number of different labels
+ Double_t fRefCov[7]; // covariance matrix of the track in the yz plane + the rest of the diagonal elements
+ Double_t fCov[3]; // covariance matrix of the tracklet in the xy plane
+ static TLinearFitter *fgFitterY; // Linear Fitter for tracklet fit in xy-plane
+ static TLinearFitter *fgFitterZ; // Linear Fitter for tracklet fit in xz-plane
+
+ ClassDef(AliTRDseedV1, 8) // The offline TRD tracklet
};
//____________________________________________________________
-inline Float_t AliTRDseedV1::GetChi2Z(const Float_t z) const
+inline Float_t AliTRDseedV1::GetChi2Z() const
+{
+ Double_t dz = fZref[0]-fZfit[0]; dz*=dz;
+ Double_t cov[3]; GetCovAt(fX, cov);
+ Double_t s2 = fRefCov[2]+cov[2];
+ return s2 > 0. ? dz/s2 : 0.;
+}
+
+//____________________________________________________________
+inline Float_t AliTRDseedV1::GetChi2Y() const
+{
+ Double_t dy = fYref[0]-fYfit[0]; dy*=dy;
+ Double_t cov[3]; GetCovAt(fX, cov);
+ Double_t s2 = fRefCov[0]+cov[0];
+ return s2 > 0. ? dy/s2 : 0.;
+}
+
+//____________________________________________________________
+inline Float_t AliTRDseedV1::GetChi2Phi() const
+{
+ Double_t dphi = fYref[1]-fYfit[1]; dphi*=dphi;
+ Double_t cov[3]; GetCovAt(fX, cov);
+ Double_t s2 = fRefCov[2]+cov[2];
+ return s2 > 0. ? dphi/s2 : 0.;
+}
+
+
+
+//____________________________________________________________
+inline Double_t AliTRDseedV1::GetPID(Int_t is) const
+{
+ if(is<0) return fProb[AliPID::kElectron];
+ if(is<AliPID::kSPECIES) return fProb[is];
+ return 0.;
+}
+
+//____________________________________________________________
+inline void AliTRDseedV1::Init(const AliRieman *rieman)
+{
+ fZref[0] = rieman->GetZat(fX0);
+ fZref[1] = rieman->GetDZat(fX0);
+ fYref[0] = rieman->GetYat(fX0);
+ fYref[1] = rieman->GetDYat(fX0);
+ if(fkReconstructor && fkReconstructor->IsHLT()){
+ fRefCov[0] = 1;
+ fRefCov[2] = 10;
+ }else{
+ fRefCov[0] = rieman->GetErrY(fX0);
+ fRefCov[2] = rieman->GetErrZ(fX0);
+ }
+ fC = rieman->GetC();
+ fChi2 = rieman->GetChi2();
+}
+
+//____________________________________________________________
+inline AliTRDcluster* AliTRDseedV1::NextCluster()
+{
+// Mimic the usage of STL iterators.
+// Forward iterator
+
+ fClusterIdx++; fClusterIter++;
+ while(fClusterIdx < kNclusters){
+ if(!(*fClusterIter)){
+ fClusterIdx++;
+ fClusterIter++;
+ continue;
+ }
+ return *fClusterIter;
+ }
+ return NULL;
+}
+
+//____________________________________________________________
+inline AliTRDcluster* AliTRDseedV1::PrevCluster()
+{
+// Mimic the usage of STL iterators.
+// Backward iterator
+
+ fClusterIdx--; fClusterIter--;
+ while(fClusterIdx >= 0){
+ if(!(*fClusterIter)){
+ fClusterIdx--;
+ fClusterIter--;
+ continue;
+ }
+ return *fClusterIter;
+ }
+ return NULL;
+}
+
+//____________________________________________________________
+inline void AliTRDseedV1::ResetClusterIter(Bool_t forward)
+{
+// Mimic the usage of STL iterators.
+// Facilitate the usage of NextCluster for forward like
+// iterator (kTRUE) and PrevCluster for backward like iterator (kFALSE)
+
+ if(forward){
+ fClusterIter = &fClusters[0]; fClusterIter--;
+ fClusterIdx=-1;
+ } else {
+ fClusterIter = &fClusters[kNclusters-1]; fClusterIter++;
+ fClusterIdx=kNclusters;
+ }
+}
+
+//____________________________________________________________
+inline void AliTRDseedV1::SetCovRef(const Double_t *cov)
+{
+// Copy some "important" covariance matrix elements
+// var(y)
+// cov(y,z) var(z)
+// var(snp)
+// var(tgl)
+// cov(tgl, 1/pt) var(1/pt)
+
+ memcpy(&fRefCov[0], cov, 3*sizeof(Double_t)); // yz full covariance
+ fRefCov[3] = cov[ 5]; // snp variance
+ fRefCov[4] = cov[ 9]; // tgl variance
+ fRefCov[5] = cov[13]; // cov(tgl, 1/pt)
+ fRefCov[6] = cov[14]; // 1/pt variance
+}
+
+
+//____________________________________________________________
+inline void AliTRDseedV1::SetN(Int_t n)
+{
+ if(n<0 || n>kNclusters) return;
+ fN &= ~kMask;
+ fN |= (n&kMask);
+}
+
+//____________________________________________________________
+inline void AliTRDseedV1::SetNUsed(Int_t n)
+{
+ if(n<0 || n>kNclusters) return;
+ UInt_t mask(kMask<<kNbits);
+ fN &= ~mask;
+ n=n<<kNbits; fN |= (n&mask);
+}
+
+//____________________________________________________________
+inline void AliTRDseedV1::SetNShared(Int_t n)
{
- Float_t z1 = (z == 0.) ? fMeanz : z;
- Float_t chi = fZref[0] - z1;
- return chi*chi;
+ if(n<0 || n>kNclusters) return;
+ UInt_t mask((kMask<<kNbits)<<kNbits);
+ fN &= ~mask;
+ n = (n<<kNbits)<<kNbits; fN|=(n&mask);
}
//____________________________________________________________
-inline Float_t AliTRDseedV1::GetChi2Y(const Float_t y) const
+inline void AliTRDseedV1::Swap(Int_t &n1, Int_t &n2)
{
- Float_t y1 = (y == 0.) ? fYfitR[0] : y;
- Float_t chi = fYref[0] - y1;
- return chi*chi;
+// swap values of n1 with n2
+ Int_t tmp(n1);
+ n1=n2; n2=tmp;
}
//____________________________________________________________
-inline void AliTRDseedV1::Update(const AliRieman *rieman)
+inline void AliTRDseedV1::Swap(Double_t &d1, Double_t &d2)
{
- fZref[0] = rieman->GetZat(fX0);
- fZref[1] = rieman->GetDZat(fX0);
- fYref[0] = rieman->GetYat(fX0);
- fYref[1] = rieman->GetDYat(fX0);
+// swap values of d1 with d2
+ Double_t tmp(d1);
+ d1=d2; d2=tmp;
}
+
#endif
+
+
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