////////////////////////////////////////////////////////////////////////////
#include "TMath.h"
-#include "TLinearFitter.h"
-#include "TClonesArray.h" // tmp
-#include <TTreeStream.h>
+#include "TTreeStream.h"
+#include "TGraphErrors.h"
#include "AliLog.h"
#include "AliMathBase.h"
+#include "AliRieman.h"
#include "AliCDBManager.h"
-#include "AliTracker.h"
+#include "AliTRDReconstructor.h"
#include "AliTRDpadPlane.h"
+#include "AliTRDtransform.h"
#include "AliTRDcluster.h"
#include "AliTRDseedV1.h"
#include "AliTRDtrackV1.h"
#include "AliTRDchamberTimeBin.h"
#include "AliTRDtrackingChamber.h"
#include "AliTRDtrackerV1.h"
-#include "AliTRDReconstructor.h"
#include "AliTRDrecoParam.h"
#include "AliTRDCommonParam.h"
+#include "AliTRDtrackletOflHelper.h"
+#include "Cal/AliTRDCalTrkAttach.h"
#include "Cal/AliTRDCalPID.h"
#include "Cal/AliTRDCalROC.h"
#include "Cal/AliTRDCalDet.h"
+class AliTracker;
+
ClassImp(AliTRDseedV1)
//____________________________________________________________________
AliTRDseedV1::AliTRDseedV1(Int_t det)
:AliTRDtrackletBase()
- ,fReconstructor(0x0)
- ,fClusterIter(0x0)
+ ,fkReconstructor(NULL)
+ ,fClusterIter(NULL)
,fExB(0.)
,fVD(0.)
,fT0(0.)
,fDiffL(0.)
,fDiffT(0.)
,fClusterIdx(0)
+ ,fErrorMsg(0)
,fN(0)
,fDet(det)
,fPt(0.)
,fZ(0.)
,fS2Y(0.)
,fS2Z(0.)
- ,fC(0.)
,fChi2(0.)
{
//
// Constructor
//
- for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
+ memset(fIndexes,0xFF,kNclusters*sizeof(fIndexes[0]));
memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
- memset(fPad, 0, 3*sizeof(Float_t));
+ memset(fPad, 0, 4*sizeof(Float_t));
fYref[0] = 0.; fYref[1] = 0.;
fZref[0] = 0.; fZref[1] = 0.;
fYfit[0] = 0.; fYfit[1] = 0.;
for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
fLabels[2]=0; // number of different labels for tracklet
- memset(fRefCov, 0, 3*sizeof(Double_t));
+ memset(fRefCov, 0, 7*sizeof(Double_t));
+ // stand alone curvature
+ fC[0] = 0.; fC[1] = 0.;
// covariance matrix [diagonal]
// default sy = 200um and sz = 2.3 cm
fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
//____________________________________________________________________
AliTRDseedV1::AliTRDseedV1(const AliTRDseedV1 &ref)
:AliTRDtrackletBase((AliTRDtrackletBase&)ref)
- ,fReconstructor(0x0)
- ,fClusterIter(0x0)
+ ,fkReconstructor(NULL)
+ ,fClusterIter(NULL)
,fExB(0.)
,fVD(0.)
,fT0(0.)
,fDiffL(0.)
,fDiffT(0.)
,fClusterIdx(0)
+ ,fErrorMsg(0)
,fN(0)
,fDet(-1)
,fPt(0.)
,fZ(0.)
,fS2Y(0.)
,fS2Z(0.)
- ,fC(0.)
,fChi2(0.)
{
//
if(!fClusters[itb]) continue;
//AliInfo(Form("deleting c %p @ %d", fClusters[itb], itb));
delete fClusters[itb];
- fClusters[itb] = 0x0;
+ fClusters[itb] = NULL;
}
}
}
//AliInfo("");
AliTRDseedV1 &target = (AliTRDseedV1 &)ref;
- target.fReconstructor = fReconstructor;
- target.fClusterIter = 0x0;
+ target.fkReconstructor = fkReconstructor;
+ target.fClusterIter = NULL;
target.fExB = fExB;
target.fVD = fVD;
target.fT0 = fT0;
target.fDiffL = fDiffL;
target.fDiffT = fDiffT;
target.fClusterIdx = 0;
+ target.fErrorMsg = fErrorMsg;
target.fN = fN;
target.fDet = fDet;
target.fPt = fPt;
target.fZ = fZ;
target.fS2Y = fS2Y;
target.fS2Z = fS2Z;
- target.fC = fC;
target.fChi2 = fChi2;
memcpy(target.fIndexes, fIndexes, kNclusters*sizeof(Int_t));
memcpy(target.fClusters, fClusters, kNclusters*sizeof(AliTRDcluster*));
- memcpy(target.fPad, fPad, 3*sizeof(Float_t));
+ memcpy(target.fPad, fPad, 4*sizeof(Float_t));
target.fYref[0] = fYref[0]; target.fYref[1] = fYref[1];
target.fZref[0] = fZref[0]; target.fZref[1] = fZref[1];
target.fYfit[0] = fYfit[0]; target.fYfit[1] = fYfit[1];
memcpy(target.fdEdx, fdEdx, kNslices*sizeof(Float_t));
memcpy(target.fProb, fProb, AliPID::kSPECIES*sizeof(Float_t));
memcpy(target.fLabels, fLabels, 3*sizeof(Int_t));
- memcpy(target.fRefCov, fRefCov, 3*sizeof(Double_t));
+ memcpy(target.fRefCov, fRefCov, 7*sizeof(Double_t));
+ target.fC[0] = fC[0]; target.fC[1] = fC[1];
memcpy(target.fCov, fCov, 3*sizeof(Double_t));
TObject::Copy(ref);
}
+//____________________________________________________________
+void AliTRDseedV1::Init(const AliRieman *rieman)
+{
+// Initialize this tracklet using the riemann fit information
+
+
+ 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[0] = rieman->GetC();
+ fChi2 = rieman->GetChi2();
+}
+
+
//____________________________________________________________
Bool_t AliTRDseedV1::Init(AliTRDtrackV1 *track)
{
Double_t y, z;
if(!track->GetProlongation(fX0, y, z)) return kFALSE;
- UpDate(track);
+ Update(track);
return kTRUE;
}
//_____________________________________________________________________________
-void AliTRDseedV1::Reset()
+void AliTRDseedV1::Reset(Option_t *opt)
{
- //
- // Reset seed
- //
+//
+// Reset seed. If option opt="c" is given only cluster arrays are cleared.
+//
+ for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
+ memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
+ fN=0; SetBit(kRowCross, kFALSE);
+ if(strcmp(opt, "c")==0) return;
+
fExB=0.;fVD=0.;fT0=0.;fS2PRF=0.;
fDiffL=0.;fDiffT=0.;
fClusterIdx=0;
- fN=0;
+ fErrorMsg = 0;
fDet=-1;
fPt=0.;
fdX=0.;fX0=0.; fX=0.; fY=0.; fZ=0.;
fS2Y=0.; fS2Z=0.;
- fC=0.; fChi2 = 0.;
+ fC[0]=0.; fC[1]=0.;
+ fChi2 = 0.;
- for(Int_t ic=kNclusters; ic--;) fIndexes[ic] = -1;
- memset(fClusters, 0, kNclusters*sizeof(AliTRDcluster*));
- memset(fPad, 0, 3*sizeof(Float_t));
+ memset(fPad, 0, 4*sizeof(Float_t));
fYref[0] = 0.; fYref[1] = 0.;
fZref[0] = 0.; fZref[1] = 0.;
fYfit[0] = 0.; fYfit[1] = 0.;
for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) fProb[ispec] = -1.;
fLabels[0]=-1; fLabels[1]=-1; // most freq MC labels
fLabels[2]=0; // number of different labels for tracklet
- memset(fRefCov, 0, 3*sizeof(Double_t));
+ memset(fRefCov, 0, 7*sizeof(Double_t));
// covariance matrix [diagonal]
// default sy = 200um and sz = 2.3 cm
fCov[0] = 4.e-4; fCov[1] = 0.; fCov[2] = 5.3;
}
//____________________________________________________________________
-void AliTRDseedV1::UpDate(const AliTRDtrackV1 *trk)
+void AliTRDseedV1::Update(const AliTRDtrackV1 *trk)
{
// update tracklet reference position from the TRD track
- // Funny name to avoid the clash with the function AliTRDseed::Update() (has to be made obselete)
Double_t fSnp = trk->GetSnp();
Double_t fTgl = trk->GetTgl();
fPt = trk->Pt();
- fYref[1] = fSnp/TMath::Sqrt(1. - fSnp*fSnp);
- fZref[1] = fTgl;
+ Double_t norm =1./TMath::Sqrt((1.-fSnp)*(1.+fSnp));
+ fYref[1] = fSnp*norm;
+ fZref[1] = fTgl*norm;
SetCovRef(trk->GetCovariance());
Double_t dx = trk->GetX() - fX0;
if((*c)->IsShared() || (*c)->IsUsed()){
if((*c)->IsShared()) SetNShared(GetNShared()-1);
else SetNUsed(GetNUsed()-1);
- (*c) = 0x0;
+ (*c) = NULL;
fIndexes[ic] = -1;
SetN(GetN()-1);
continue;
// 3. cluster size
//
- Int_t nclusters[kNslices];
- memset(nclusters, 0, kNslices*sizeof(Int_t));
memset(fdEdx, 0, kNslices*sizeof(Float_t));
-
const Double_t kDriftLength = (.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
- AliTRDcluster *c = 0x0;
+ AliTRDcluster *c(NULL);
for(int ic=0; ic<AliTRDtrackerV1::GetNTimeBins(); ic++){
if(!(c = fClusters[ic]) && !(c = fClusters[ic+kNtb])) continue;
Float_t dx = TMath::Abs(fX0 - c->GetX());
-
+
// Filter clusters for dE/dx calculation
-
+
// 1.consider calibration effects for slice determination
Int_t slice;
- if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber()
+ if(dx<kDriftLength){ // TODO should be replaced by c->IsInChamber()
slice = Int_t(dx * nslices / kDriftLength);
} else slice = c->GetX() < fX0 ? nslices-1 : 0;
// 2. take sharing into account
Float_t w = /*c->IsShared() ? .5 :*/ 1.;
-
+
// 3. take into account large clusters TODO
//w *= c->GetNPads() > 3 ? .8 : 1.;
-
+
//CHECK !!!
fdEdx[slice] += w * GetdQdl(ic); //fdQdl[ic];
- nclusters[slice]++;
} // End of loop over clusters
-
- //if(fReconstructor->GetPIDMethod() == AliTRDReconstructor::kLQPID){
- if(nslices == AliTRDpidUtil::kLQslices){
- // calculate mean charge per slice (only LQ PID)
- for(int is=0; is<nslices; is++){
- if(nclusters[is]) fdEdx[is] /= nclusters[is];
- }
- }
}
//_____________________________________________________________________________
if ((fLabels[2] > 1) && (out[3] > 1)) fLabels[1] = out[2];
}
+//____________________________________________________________
+Float_t AliTRDseedV1::GetAnodeWireOffset(Float_t zt)
+{
+// Find position inside the amplification cell for reading drift velocity map
+
+ Float_t d = fPad[3] - zt;
+ if(d<0.){
+ AliError(Form("Fail AnodeWireOffset calculation z0[%+7.2f] zt[%+7.2f] d[%+7.2f].", fPad[3], zt, d));
+ return 0.125;
+ }
+ d -= ((Int_t)(2 * d)) / 2.0;
+ if(d > 0.25) d = 0.5 - d;
+ return d;
+}
+
//____________________________________________________________________
-Float_t AliTRDseedV1::GetdQdl(Int_t ic) const
+Float_t AliTRDseedV1::GetCharge(Bool_t useOutliers) const
+{
+// Computes total charge attached to tracklet. If "useOutliers" is set clusters
+// which are not in chamber are also used (default false)
+
+ AliTRDcluster *c(NULL); Float_t qt(0.);
+ for(int ic=0; ic<kNclusters; ic++){
+ if(!(c=fClusters[ic])) continue;
+ if(c->IsInChamber() && !useOutliers) continue;
+ qt += TMath::Abs(c->GetQ());
+ }
+ return qt;
+}
+
+//____________________________________________________________________
+Bool_t AliTRDseedV1::GetEstimatedCrossPoint(Float_t &x, Float_t &z) const
+{
+// Algorithm to estimate cross point in the x-z plane for pad row cross tracklets.
+// Returns true in case of success.
+ if(!IsRowCross()) return kFALSE;
+
+ x=0.; z=0.;
+ AliTRDcluster *c(NULL);
+ // Find radial range for first row
+ Float_t x1[] = {0., 1.e3};
+ for(int ic=0; ic<kNtb; ic++){
+ if(!(c=fClusters[ic])) continue;
+ if(!c->IsInChamber()) continue;
+ if(c->GetX() <= x1[1]) x1[1] = c->GetX();
+ if(c->GetX() >= x1[0]) x1[0] = c->GetX();
+ z=c->GetZ();
+ }
+ if((x1[0] - x1[1])<1.e-5) return kFALSE;
+
+ // Find radial range for second row
+ Bool_t kZ(kFALSE);
+ Float_t x2[] = {0., 1.e3};
+ for(int ic=kNtb; ic<kNclusters; ic++){
+ if(!(c=fClusters[ic])) continue;
+ if(!c->IsInChamber()) continue;
+ if(c->GetX() <= x2[1]) x2[1] = c->GetX();
+ if(c->GetX() >= x2[0]) x2[0] = c->GetX();
+ if(!kZ){
+ z+=c->GetZ();
+ z*=0.5;
+ kZ=kTRUE;
+ }
+ }
+ if((x2[0] - x2[1])<1.e-5) return kFALSE;
+
+ // Find intersection of the 2 radial regions
+ x = 0.5*((x1[0]+x1[1] > x2[0]+x2[1]) ? (x1[1]+x2[0]) : (x1[0]+x2[1]));
+ return kTRUE;
+}
+
+//____________________________________________________________________
+Float_t AliTRDseedV1::GetQperTB(Int_t tb) const
+{
+ //
+ // Charge of the clusters at timebin
+ //
+ Float_t Q = 0;
+ if(fClusters[tb] /*&& fClusters[tb]->IsInChamber()*/)
+ Q += TMath::Abs(fClusters[tb]->GetQ());
+ if(fClusters[tb+kNtb] /*&& fClusters[tb+kNtb]->IsInChamber()*/)
+ Q += TMath::Abs(fClusters[tb+kNtb]->GetQ());
+ return Q/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]);
+}
+
+//____________________________________________________________________
+Float_t AliTRDseedV1::GetdQdl() const
+{
+// Calculate total charge / tracklet length for 1D PID
+//
+ Float_t Q = GetCharge(kTRUE);
+ return Q/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]);
+}
+
+//____________________________________________________________________
+Float_t AliTRDseedV1::GetdQdl(Int_t ic, Float_t *dl) const
{
// Using the linear approximation of the track inside one TRD chamber (TRD tracklet)
// the charge per unit length can be written as:
// BEGIN_LATEX
-// #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dy}{dx}}^{2}_{ref}}}
+// #frac{dq}{dl} = #frac{q_{c}}{dx * #sqrt{1 + #(){#frac{dy}{dx}}^{2}_{fit} + #(){#frac{dz}{dx}}^{2}_{ref}}}
// END_LATEX
// where qc is the total charge collected in the current time bin and dx is the length
-// of the time bin. For the moment (Jan 20 2009) only pad row cross corrections are
-// considered for the charge but none are applied for drift velocity variations along
-// the drift region or assymetry of the TRF
+// of the time bin.
+// The following correction are applied :
+// - charge : pad row cross corrections
+// [diffusion and TRF assymetry] TODO
+// - dx : anisochronity, track inclination - see Fit and AliTRDcluster::GetXloc()
+// and AliTRDcluster::GetYloc() for the effects taken into account
//
+//Begin_Html
+//<img src="TRD/trackletDQDT.gif">
+//End_Html
+// In the picture the energy loss measured on the tracklet as a function of drift time [left] and respectively
+// drift length [right] for different particle species is displayed.
// Author : Alex Bercuci <A.Bercuci@gsi.de>
//
Float_t dq = 0.;
- if(fClusters[ic]) dq += TMath::Abs(fClusters[ic]->GetQ());
- if(fClusters[ic+kNtb]) dq += TMath::Abs(fClusters[ic+kNtb]->GetQ());
- if(dq<1.e-3 || fdX < 1.e-3) return 0.;
+ // check whether both clusters are inside the chamber
+ Bool_t hasClusterInChamber = kFALSE;
+ if(fClusters[ic] && fClusters[ic]->IsInChamber()){
+ hasClusterInChamber = kTRUE;
+ dq += TMath::Abs(fClusters[ic]->GetQ());
+ }
+ if(fClusters[ic+kNtb] && fClusters[ic+kNtb]->IsInChamber()){
+ hasClusterInChamber = kTRUE;
+ dq += TMath::Abs(fClusters[ic+kNtb]->GetQ());
+ }
+ if(!hasClusterInChamber) return 0.;
+ if(dq<1.e-3) return 0.;
+
+ Double_t dx = fdX;
+ if(ic-1>=0 && ic+1<kNtb){
+ Float_t x2(0.), x1(0.);
+ // try to estimate upper radial position (find the cluster which is inside the chamber)
+ if(fClusters[ic-1] && fClusters[ic-1]->IsInChamber()) x2 = fClusters[ic-1]->GetX();
+ else if(fClusters[ic-1+kNtb] && fClusters[ic-1+kNtb]->IsInChamber()) x2 = fClusters[ic-1+kNtb]->GetX();
+ else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x2 = fClusters[ic]->GetX()+fdX;
+ else x2 = fClusters[ic+kNtb]->GetX()+fdX;
+ // try to estimate lower radial position (find the cluster which is inside the chamber)
+ if(fClusters[ic+1] && fClusters[ic+1]->IsInChamber()) x1 = fClusters[ic+1]->GetX();
+ else if(fClusters[ic+1+kNtb] && fClusters[ic+1+kNtb]->IsInChamber()) x1 = fClusters[ic+1+kNtb]->GetX();
+ else if(fClusters[ic] && fClusters[ic]->IsInChamber()) x1 = fClusters[ic]->GetX()-fdX;
+ else x1 = fClusters[ic+kNtb]->GetX()-fdX;
+
+ dx = .5*(x2 - x1);
+ }
+ dx *= TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]);
+ if(dl) (*dl) = dx;
+ if(dx>1.e-9) return dq/dx;
+ else return 0.;
+}
+
+//____________________________________________________________
+Float_t AliTRDseedV1::GetMomentum(Float_t *err) const
+{
+// Returns momentum of the track after update with the current tracklet as:
+// BEGIN_LATEX
+// p=#frac{1}{1/p_{t}} #sqrt{1+tgl^{2}}
+// END_LATEX
+// and optionally the momentum error (if err is not null).
+// The estimated variance of the momentum is given by:
+// BEGIN_LATEX
+// #sigma_{p}^{2} = (#frac{dp}{dp_{t}})^{2} #sigma_{p_{t}}^{2}+(#frac{dp}{dtgl})^{2} #sigma_{tgl}^{2}+2#frac{dp}{dp_{t}}#frac{dp}{dtgl} cov(tgl,1/p_{t})
+// END_LATEX
+// which can be simplified to
+// BEGIN_LATEX
+// #sigma_{p}^{2} = p^{2}p_{t}^{4}tgl^{2}#sigma_{tgl}^{2}-2p^{2}p_{t}^{3}tgl cov(tgl,1/p_{t})+p^{2}p_{t}^{2}#sigma_{1/p_{t}}^{2}
+// END_LATEX
+//
- return dq/fdX/TMath::Sqrt(1. + fYfit[1]*fYfit[1] + fZref[1]*fZref[1]);
+ Double_t p = fPt*TMath::Sqrt(1.+fZref[1]*fZref[1]);
+ Double_t p2 = p*p;
+ Double_t tgl2 = fZref[1]*fZref[1];
+ Double_t pt2 = fPt*fPt;
+ if(err){
+ Double_t s2 =
+ p2*tgl2*pt2*pt2*fRefCov[4]
+ -2.*p2*fZref[1]*fPt*pt2*fRefCov[5]
+ +p2*pt2*fRefCov[6];
+ (*err) = TMath::Sqrt(s2);
+ }
+ return p;
+}
+
+
+//____________________________________________________________________
+Int_t AliTRDseedV1::GetTBoccupancy() const
+{
+// Returns no. of TB occupied by clusters
+
+ Int_t n(0);
+ for(int ic(0); ic<kNtb; ic++){
+ if(!fClusters[ic] && !fClusters[ic+kNtb]) continue;
+ n++;
+ }
+ return n;
+}
+
+//____________________________________________________________________
+Int_t AliTRDseedV1::GetTBcross() const
+{
+// Returns no. of TB occupied by 2 clusters for pad row cross tracklets
+
+ if(!IsRowCross()) return 0;
+ Int_t n(0);
+ for(int ic(0); ic<kNtb; ic++){
+ if(fClusters[ic] && fClusters[ic+kNtb]) n++;
+ }
+ return n;
}
//____________________________________________________________________
Float_t* AliTRDseedV1::GetProbability(Bool_t force)
{
if(!force) return &fProb[0];
- if(!CookPID()) return 0x0;
+ if(!CookPID()) return NULL;
return &fProb[0];
}
// Parameters
//
// Output
-// returns pointer to the probability array and 0x0 if missing DB access
+// returns pointer to the probability array and NULL if missing DB access
//
-// Detailed description
+// Retrieve PID probabilities for e+-, mu+-, K+-, pi+- and p+- from the DB according to tracklet information:
+// - estimated momentum at tracklet reference point
+// - dE/dx measurements
+// - tracklet length
+// - TRD layer
+// According to the steering settings specified in the reconstruction one of the following methods are used
+// - Neural Network [default] - option "nn"
+// - 2D Likelihood - option "!nn"
-
- // retrive calibration db
AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
if (!calibration) {
AliError("No access to calibration data");
return kFALSE;
}
- if (!fReconstructor) {
+ if (!fkReconstructor) {
AliError("Reconstructor not set.");
return kFALSE;
}
// Retrieve the CDB container class with the parametric detector response
- const AliTRDCalPID *pd = calibration->GetPIDObject(fReconstructor->GetPIDMethod());
+ const AliTRDCalPID *pd = calibration->GetPIDObject(fkReconstructor->GetPIDMethod());
if (!pd) {
AliError("No access to AliTRDCalPID object");
return kFALSE;
}
- //AliInfo(Form("Method[%d] : %s", fReconstructor->GetRecoParam() ->GetPIDMethod(), pd->IsA()->GetName()));
// calculate tracklet length TO DO
- Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick());
- /// TMath::Sqrt((1.0 - fSnp[iPlane]*fSnp[iPlane]) / (1.0 + fTgl[iPlane]*fTgl[iPlane]));
+ Float_t length = (AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick())/ TMath::Sqrt((1.0 - GetSnp()*GetSnp()) / (1.0 + GetTgl()*GetTgl()));
//calculate dE/dx
- CookdEdx(fReconstructor->GetNdEdxSlices());
-
- // Sets the a priori probabilities
- for(int ispec=0; ispec<AliPID::kSPECIES; ispec++) {
- fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, GetPlane());
- }
+ CookdEdx(AliTRDCalPID::kNSlicesNN);
+ AliDebug(4, Form("p=%6.4f[GeV/c] dEdx{%7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f %7.2f} l=%4.2f[cm]", GetMomentum(), fdEdx[0], fdEdx[1], fdEdx[2], fdEdx[3], fdEdx[4], fdEdx[5], fdEdx[6], fdEdx[7], length));
+ // Sets the a priori probabilities
+ Bool_t kPIDNN(fkReconstructor->GetPIDMethod()==AliTRDpidUtil::kNN);
+ for(int ispec=0; ispec<AliPID::kSPECIES; ispec++)
+ fProb[ispec] = pd->GetProbability(ispec, GetMomentum(), &fdEdx[0], length, kPIDNN?GetPlane():fkReconstructor->GetRecoParam()->GetPIDLQslices());
+
return kTRUE;
}
//GetPadLength()*GetPadLength()/12.;
// insert systematic uncertainties
- if(fReconstructor){
+ if(fkReconstructor){
Double_t sys[15]; memset(sys, 0, 15*sizeof(Double_t));
- fReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
+ fkReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
sy2 += sys[0];
sz2 += sys[1];
}
- // rotate covariance matrix
- Double_t t2 = GetTilt()*GetTilt();
- Double_t correction = 1./(1. + t2);
- cov[0] = (sy2+t2*sz2)*correction;
- cov[1] = GetTilt()*(sz2 - sy2)*correction;
- cov[2] = (t2*sy2+sz2)*correction;
- //printf("C(%6.1f %+6.3f %6.1f) [%s]\n", 1.e4*TMath::Sqrt(cov[0]), cov[1], 1.e4*TMath::Sqrt(cov[2]), IsRowCross()?" RC ":"-");
+ // rotate covariance matrix if no RC
+ if(!IsRowCross()){
+ Double_t t2 = GetTilt()*GetTilt();
+ Double_t correction = 1./(1. + t2);
+ cov[0] = (sy2+t2*sz2)*correction;
+ cov[1] = GetTilt()*(sz2 - sy2)*correction;
+ cov[2] = (t2*sy2+sz2)*correction;
+ } else {
+ cov[0] = sy2; cov[1] = 0.; cov[2] = sy2;
+ }
+
+ AliDebug(4, Form("C(%6.1f %+6.3f %6.1f) RC[%c]", 1.e4*TMath::Sqrt(cov[0]), cov[1], 1.e4*TMath::Sqrt(cov[2]), IsRowCross()?'y':'n'));
}
//____________________________________________________________
-Double_t AliTRDseedV1::GetCovSqrt(Double_t *c, Double_t *d)
+Int_t AliTRDseedV1::GetCovSqrt(const Double_t * const c, Double_t *d)
{
// Helper function to calculate the square root of the covariance matrix.
// The input matrix is stored in the vector c and the result in the vector d.
// Author A.Bercuci <A.Bercuci@gsi.de>
// Date Mar 19 2009
- Double_t L[2], // eigenvalues
- V[3]; // eigenvectors
+ const Double_t kZero(1.e-20);
+ Double_t l[2], // eigenvalues
+ v[3]; // eigenvectors
// the secular equation and its solution :
// (c[0]-L)(c[2]-L)-c[1]^2 = 0
// L^2 - L*Tr(c)+DET(c) = 0
// L12 = [Tr(c) +- sqrt(Tr(c)^2-4*DET(c))]/2
- Double_t Tr = c[0]+c[2], // trace
- DET = c[0]*c[2]-c[1]*c[1]; // determinant
- if(TMath::Abs(DET)<1.e-20) return -1.;
- Double_t DD = TMath::Sqrt(Tr*Tr - 4*DET);
- L[0] = .5*(Tr + DD);
- L[1] = .5*(Tr - DD);
- if(L[0]<0. || L[1]<0.) return -1.;
-
+ Double_t tr = c[0]+c[2], // trace
+ det = c[0]*c[2]-c[1]*c[1]; // determinant
+ if(TMath::Abs(det)<kZero) return 1;
+ Double_t dd = TMath::Sqrt(tr*tr - 4*det);
+ l[0] = .5*(tr + dd*(c[0]>c[2]?-1.:1.));
+ l[1] = .5*(tr + dd*(c[0]>c[2]?1.:-1.));
+ if(l[0]<kZero || l[1]<kZero) return 2;
// the sym V matrix
// | v00 v10|
// | v10 v11|
- Double_t tmp = (L[0]-c[0])/c[1];
- V[0] = TMath::Sqrt(1./(tmp*tmp+1));
- V[1] = tmp*V[0];
- V[2] = V[1]*c[1]/(L[1]-c[2]);
+ Double_t den = (l[0]-c[0])*(l[0]-c[0])+c[1]*c[1];
+ if(den<kZero){ // almost diagonal
+ v[0] = TMath::Sign(0., c[1]);
+ v[1] = TMath::Sign(1., (l[0]-c[0]));
+ v[2] = TMath::Sign(0., c[1]*(l[0]-c[0])*(l[1]-c[2]));
+ } else {
+ Double_t tmp = 1./TMath::Sqrt(den);
+ v[0] = c[1]* tmp;
+ v[1] = (l[0]-c[0])*tmp;
+ if(TMath::Abs(l[1]-c[2])<kZero) v[2] = TMath::Sign(v[0]*(l[0]-c[0])/kZero, (l[1]-c[2]));
+ else v[2] = v[0]*(l[0]-c[0])/(l[1]-c[2]);
+ }
// the VD^{1/2}V is:
- L[0] = TMath::Sqrt(L[0]); L[1] = TMath::Sqrt(L[1]);
- d[0] = V[0]*V[0]*L[0]+V[1]*V[1]*L[1];
- d[1] = V[0]*V[1]*L[0]+V[1]*V[2]*L[1];
- d[2] = V[1]*V[1]*L[0]+V[2]*V[2]*L[1];
+ l[0] = TMath::Sqrt(l[0]); l[1] = TMath::Sqrt(l[1]);
+ d[0] = v[0]*v[0]*l[0]+v[1]*v[1]*l[1];
+ d[1] = v[0]*v[1]*l[0]+v[1]*v[2]*l[1];
+ d[2] = v[1]*v[1]*l[0]+v[2]*v[2]*l[1];
- return 1.;
+ return 0;
}
//____________________________________________________________
-Double_t AliTRDseedV1::GetCovInv(Double_t *c, Double_t *d)
+Double_t AliTRDseedV1::GetCovInv(const Double_t * const c, Double_t *d)
{
// Helper function to calculate the inverse of the covariance matrix.
// The input matrix is stored in the vector c and the result in the vector d.
// Author A.Bercuci <A.Bercuci@gsi.de>
// Date Mar 19 2009
- Double_t Det = c[0]*c[2] - c[1]*c[1];
- if(TMath::Abs(Det)<1.e-20) return 0.;
- Double_t InvDet = 1./Det;
- d[0] = c[2]*InvDet;
- d[1] =-c[1]*InvDet;
- d[2] = c[0]*InvDet;
- return Det;
+ Double_t det = c[0]*c[2] - c[1]*c[1];
+ if(TMath::Abs(det)<1.e-20) return 0.;
+ Double_t invDet = 1./det;
+ d[0] = c[2]*invDet;
+ d[1] =-c[1]*invDet;
+ d[2] = c[0]*invDet;
+ return det;
}
//____________________________________________________________________
UShort_t AliTRDseedV1::GetVolumeId() const
{
- Int_t ic=0;
- while(ic<kNclusters && !fClusters[ic]) ic++;
- return fClusters[ic] ? fClusters[ic]->GetVolumeId() : 0;
+// Returns geometry volume id by delegation
+
+ for(Int_t ic(0);ic<kNclusters; ic++){
+ if(fClusters[ic]) return fClusters[ic]->GetVolumeId();
+ }
+ return 0;
}
}
}
- fT0 = t0Det->GetValue(fDet) + t0ROC->GetValue(col,row);
+ fT0 = (t0Det->GetValue(fDet) + t0ROC->GetValue(col,row)) / AliTRDCommonParam::Instance()->GetSamplingFrequency();
fVD = vdDet->GetValue(fDet) * vdROC->GetValue(col, row);
fS2PRF = calib->GetPRFWidth(fDet, col, row); fS2PRF *= fS2PRF;
fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD);
AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL,
fDiffT, fVD);
+ AliDebug(4, Form("Calibration params for Det[%3d] Col[%3d] Row[%2d]\n t0[%f] vd[%f] s2PRF[%f] ExB[%f] Dl[%f] Dt[%f]", fDet, col, row, fT0, fVD, fS2PRF, fExB, fDiffL, fDiffT));
+
+
SetBit(kCalib, kTRUE);
}
}
//____________________________________________________________
-void AliTRDseedV1::SetPadPlane(AliTRDpadPlane *p)
+void AliTRDseedV1::SetPadPlane(AliTRDpadPlane * const p)
{
// Shortcut method to initialize pad geometry.
- if(!p) return;
- SetTilt(TMath::Tan(TMath::DegToRad()*p->GetTiltingAngle()));
- SetPadLength(p->GetLengthIPad());
- SetPadWidth(p->GetWidthIPad());
+ fPad[0] = p->GetLengthIPad();
+ fPad[1] = p->GetWidthIPad();
+ fPad[2] = TMath::Tan(TMath::DegToRad()*p->GetTiltingAngle());
+ fPad[3] = p->GetRow0() + p->GetAnodeWireOffset();
}
+
//____________________________________________________________________
-Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *chamber, Bool_t tilt)
+Bool_t AliTRDseedV1::AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt, Bool_t chgPos, Int_t ev)
{
- //
- // Projective algorithm to attach clusters to seeding tracklets
- //
- // Parameters
- //
- // Output
- //
- // Detailed description
- // 1. Collapse x coordinate for the full detector plane
- // 2. truncated mean on y (r-phi) direction
- // 3. purge clusters
- // 4. truncated mean on z direction
- // 5. purge clusters
- // 6. fit tracklet
- //
- Bool_t kPRINT = kFALSE;
- if(!fReconstructor->GetRecoParam() ){
- AliError("Seed can not be used without a valid RecoParam.");
+//
+// Projective algorithm to attach clusters to seeding tracklets. The following steps are performed :
+// 1. Collapse x coordinate for the full detector plane
+// 2. truncated mean on y (r-phi) direction
+// 3. purge clusters
+// 4. truncated mean on z direction
+// 5. purge clusters
+//
+// Parameters
+// - chamber : pointer to tracking chamber container used to search the tracklet
+// - tilt : switch for tilt correction during road building [default true]
+// - chgPos : mark same[kFALSE] and opposite[kTRUE] sign tracks with respect to Bz field sign [default true]
+// - ev : event number for debug purposes [default = -1]
+// Output
+// - true : if tracklet found successfully. Failure can happend because of the following:
+// -
+// Detailed description
+//
+// We start up by defining the track direction in the xy plane and roads. The roads are calculated based
+// on tracking information (variance in the r-phi direction) and estimated variance of the standard
+// clusters (see AliTRDcluster::SetSigmaY2()) corrected for tilt (see GetCovAt()). From this the road is
+// BEGIN_LATEX
+// r_{y} = 3*#sqrt{12*(#sigma^{2}_{Trk}(y) + #frac{#sigma^{2}_{cl}(y) + tg^{2}(#alpha_{L})#sigma^{2}_{cl}(z)}{1+tg^{2}(#alpha_{L})})}
+// r_{z} = 1.5*L_{pad}
+// END_LATEX
+//
+// Author : Alexandru Bercuci <A.Bercuci@gsi.de>
+// Debug : level = 2 for calibration
+// level = 3 for visualization in the track SR
+// level = 4 for full visualization including digit level
+
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it
+
+ if(!recoParam){
+ AliError("Tracklets can not be used without a valid RecoParam.");
+ return kFALSE;
+ }
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!calibration) {
+ AliError("No access to calibration data");
return kFALSE;
}
+ // Retrieve the CDB container class with the parametric likelihood
+ const AliTRDCalTrkAttach *attach = calibration->GetAttachObject();
+ if (!attach) {
+ AliError("No usable AttachClusters calib object.");
+ return kFALSE;
+ }
+
// Initialize reco params for this tracklet
// 1. first time bin in the drift region
- Int_t t0 = 4;
- Int_t kClmin = Int_t(fReconstructor->GetRecoParam() ->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
-
- Double_t syRef = TMath::Sqrt(fRefCov[0]);
+ Int_t t0 = 14;
+ Int_t kClmin = Int_t(recoParam->GetFindableClusters()*AliTRDtrackerV1::GetNTimeBins());
+ Int_t kTBmin = 4;
+
+ Double_t sysCov[5]; recoParam->GetSysCovMatrix(sysCov);
+ Double_t s2yTrk= fRefCov[0],
+ s2yCl = 0.,
+ s2zCl = GetPadLength()*GetPadLength()/12.,
+ syRef = TMath::Sqrt(s2yTrk),
+ t2 = GetTilt()*GetTilt();
//define roads
- Double_t kroady = 1.;
- //fReconstructor->GetRecoParam() ->GetRoad1y();
- Double_t kroadz = GetPadLength() * 1.5 + 1.;
- if(kPRINT) printf("AttachClusters() sy[%f] road[%f]\n", syRef, kroady);
+ const Double_t kroady = 3.; //recoParam->GetRoad1y();
+ const Double_t kroadz = GetPadLength() * recoParam->GetRoadzMultiplicator() + 1.;
+ // define probing cluster (the perfect cluster) and default calibration
+ Short_t sig[] = {0, 0, 10, 30, 10, 0,0};
+ AliTRDcluster cp(fDet, 6, 75, 0, sig, 0);
+ if(fkReconstructor->IsHLT()) cp.SetRPhiMethod(AliTRDcluster::kCOG);
+ if(!IsCalibrated()) Calibrate();
+
+/* Int_t kroadyShift(0);
+ Float_t bz(AliTrackerBase::GetBz());
+ if(TMath::Abs(bz)>2.){
+ if(bz<0.) kroadyShift = chgPos ? +1 : -1;
+ else kroadyShift = chgPos ? -1 : +1;
+ }*/
+ AliDebug(4, Form("\n syTrk[cm]=%4.2f dydxTrk[deg]=%+6.2f Chg[%c] rY[cm]=%4.2f rZ[cm]=%5.2f TC[%c]", syRef, TMath::ATan(fYref[1])*TMath::RadToDeg(), chgPos?'+':'-', kroady, kroadz, tilt?'y':'n'));
+ Double_t phiTrk(TMath::ATan(fYref[1])),
+ thtTrk(TMath::ATan(fZref[1]));
// working variables
const Int_t kNrows = 16;
- AliTRDcluster *clst[kNrows][kNclusters];
- Double_t cond[4], dx, dy, yt, zt,
- yres[kNrows][kNclusters];
- Int_t idxs[kNrows][kNclusters], ncl[kNrows], ncls = 0;
+ const Int_t kNcls = 3*kNclusters; // buffer size
+ TObjArray clst[kNrows];
+ Bool_t blst[kNrows][kNcls];
+ Double_t cond[4],
+ dx, dy, dz,
+ yt, zt,
+ zc[kNrows],
+ xres[kNrows][kNcls], yres[kNrows][kNcls], zres[kNrows][kNcls], s2y[kNrows][kNcls];
+ Int_t idxs[kNrows][kNcls], ncl[kNrows], ncls = 0;
memset(ncl, 0, kNrows*sizeof(Int_t));
- memset(clst, 0, kNrows*kNclusters*sizeof(AliTRDcluster*));
-
- // Do cluster projection
- AliTRDcluster *c = 0x0;
- AliTRDchamberTimeBin *layer = 0x0;
+ memset(zc, 0, kNrows*sizeof(Double_t));
+ memset(idxs, 0, kNrows*kNcls*sizeof(Int_t));
+ memset(xres, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(yres, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(zres, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(s2y, 0, kNrows*kNcls*sizeof(Double_t));
+ memset(blst, 0, kNrows*kNcls*sizeof(Bool_t)); //this is 8 times faster to memset than "memset(clst, 0, kNrows*kNcls*sizeof(AliTRDcluster*))"
+
+ Double_t roady(0.), s2Mean(0.), sMean(0.); Int_t ns2Mean(0);
+
+ // Do cluster projection and pick up cluster candidates
+ AliTRDcluster *c(NULL);
+ AliTRDchamberTimeBin *layer(NULL);
Bool_t kBUFFER = kFALSE;
- for (Int_t it = 0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
+ for (Int_t it = 0; it < kNtb; it++) {
if(!(layer = chamber->GetTB(it))) continue;
if(!Int_t(*layer)) continue;
-
+ // get track projection at layers position
dx = fX0 - layer->GetX();
yt = fYref[0] - fYref[1] * dx;
zt = fZref[0] - fZref[1] * dx;
- if(kPRINT) printf("\t%2d dx[%f] yt[%f] zt[%f]\n", it, dx, yt, zt);
-
- // select clusters on a 5 sigmaKalman level
- cond[0] = yt; cond[2] = kroady;
+ // get standard cluster error corrected for tilt if selected
+ cp.SetLocalTimeBin(it);
+ cp.SetSigmaY2(0.02, fDiffT, fExB, dx, -1./*zt*/, fYref[1]);
+ s2yCl = cp.GetSigmaY2() + sysCov[0]; if(!tilt) s2yCl = (s2yCl + t2*s2zCl)/(1.+t2);
+ if(TMath::Abs(it-12)<7){ s2Mean += cp.GetSigmaY2(); ns2Mean++;}
+ // get estimated road in r-phi direction
+ roady = TMath::Min(3.*TMath::Sqrt(12.*(s2yTrk + s2yCl)), kroady);
+
+ AliDebug(5, Form("\n"
+ " %2d xd[cm]=%6.3f yt[cm]=%7.2f zt[cm]=%8.2f\n"
+ " syTrk[um]=%6.2f syCl[um]=%6.2f syClTlt[um]=%6.2f\n"
+ " Ry[mm]=%f"
+ , it, dx, yt, zt
+ , 1.e4*TMath::Sqrt(s2yTrk), 1.e4*TMath::Sqrt(cp.GetSigmaY2()+sysCov[0]), 1.e4*TMath::Sqrt(s2yCl)
+ , 1.e1*roady));
+
+ // get clusters from layer
+ cond[0] = yt/*+0.5*kroadyShift*kroady*/; cond[2] = roady;
cond[1] = zt; cond[3] = kroadz;
- Int_t n=0, idx[6];
- layer->GetClusters(cond, idx, n, 6);
+ Int_t n=0, idx[6]; layer->GetClusters(cond, idx, n, 6);
for(Int_t ic = n; ic--;){
c = (*layer)[idx[ic]];
- dy = yt - c->GetY();
- dy += tilt ? GetTilt() * (c->GetZ() - zt) : 0.;
- // select clusters on a 3 sigmaKalman level
-/* if(tilt && TMath::Abs(dy) > 3.*syRef){
- printf("too large !!!\n");
- continue;
- }*/
+ dx = fX0 - c->GetX();
+ yt = fYref[0] - fYref[1] * dx;
+ zt = fZref[0] - fZref[1] * dx;
+ dz = zt - c->GetZ();
+ dy = yt - (c->GetY() + (tilt ? (GetTilt() * dz) : 0.));
Int_t r = c->GetPadRow();
- if(kPRINT) printf("\t\t%d dy[%f] yc[%f] r[%d]\n", ic, TMath::Abs(dy), c->GetY(), r);
- clst[r][ncl[r]] = c;
+ clst[r].AddAtAndExpand(c, ncl[r]);
+ blst[r][ncl[r]] = kTRUE;
idxs[r][ncl[r]] = idx[ic];
+ zres[r][ncl[r]] = dz/GetPadLength();
yres[r][ncl[r]] = dy;
+ xres[r][ncl[r]] = dx;
+ zc[r] = c->GetZ();
+ // TODO temporary solution to avoid divercences in error parametrization
+ s2y[r][ncl[r]] = TMath::Min(c->GetSigmaY2()+sysCov[0], 0.025);
+ AliDebug(5, Form(" -> dy[cm]=%+7.4f yc[cm]=%7.2f row[%d] idx[%2d]", dy, c->GetY(), r, ncl[r]));
ncl[r]++; ncls++;
- if(ncl[r] >= kNclusters) {
- AliWarning(Form("Cluster candidates reached limit %d. Some may be lost.", kNclusters));
+ if(ncl[r] >= kNcls) {
+ AliWarning(Form("Cluster candidates row[%d] reached buffer limit[%d]. Some may be lost.", r, kNcls));
kBUFFER = kTRUE;
break;
}
}
if(kBUFFER) break;
}
- if(kPRINT) printf("Found %d clusters\n", ncls);
- if(ncls<kClmin) return kFALSE;
-
- // analyze each row individualy
- Double_t mean, syDis;
- Int_t nrow[] = {0, 0, 0}, nr = 0, lr=-1;
- for(Int_t ir=kNrows; ir--;){
- if(!(ncl[ir])) continue;
- if(lr>0 && lr-ir != 1){
- if(kPRINT) printf("W - gap in rows attached !!\n");
+ if(ncls<kClmin){
+ AliDebug(1, Form("CLUSTERS FOUND %d LESS THAN THRESHOLD %d.", ncls, kClmin));
+ SetErrorMsg(kAttachClFound);
+ for(Int_t ir(kNrows);ir--;) clst[ir].Clear();
+ return kFALSE;
+ }
+ if(ns2Mean<kTBmin){
+ AliDebug(1, Form("CLUSTERS IN TimeBins %d LESS THAN THRESHOLD %d.", ns2Mean, kTBmin));
+ SetErrorMsg(kAttachClFound);
+ for(Int_t ir(kNrows);ir--;) clst[ir].Clear();
+ return kFALSE;
+ }
+ s2Mean /= ns2Mean; sMean = TMath::Sqrt(s2Mean);
+ //Double_t sRef(TMath::Sqrt(s2Mean+s2yTrk)); // reference error parameterization
+
+ // organize row candidates
+ Int_t idxRow[kNrows], nrc(0); Double_t zresRow[kNrows];
+ for(Int_t ir(0); ir<kNrows; ir++){
+ idxRow[ir]=-1; zresRow[ir] = 999.;
+ if(!ncl[ir]) continue;
+ // get mean z resolution
+ dz = 0.; for(Int_t ic = ncl[ir]; ic--;) dz += zres[ir][ic]; dz/=ncl[ir];
+ // insert row
+ idxRow[nrc] = ir; zresRow[nrc] = TMath::Abs(dz); nrc++;
+ }
+ AliDebug(4, Form("Found %d clusters in %d rows. Sorting ...", ncls, nrc));
+
+ // sort row candidates
+ if(nrc>=2){
+ if(nrc==2){
+ if(zresRow[0]>zresRow[1]){ // swap
+ Int_t itmp=idxRow[1]; idxRow[1] = idxRow[0]; idxRow[0] = itmp;
+ Double_t dtmp=zresRow[1]; zresRow[1] = zresRow[0]; zresRow[0] = dtmp;
+ }
+ if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){
+ SetErrorMsg(kAttachRowGap);
+ AliDebug(2, Form("Rows attached not continuous. Select first candidate.\n"
+ " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f",
+ idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], idxRow[1]<0?0:ncl[idxRow[1]], zresRow[1]));
+ nrc=1; idxRow[1] = -1; zresRow[1] = 999.;
+ }
+ } else {
+ Int_t idx0[kNrows];
+ TMath::Sort(nrc, zresRow, idx0, kFALSE);
+ nrc = 3; // select only maximum first 3 candidates
+ Int_t iatmp[] = {-1, -1, -1}; Double_t datmp[] = {999., 999., 999.};
+ for(Int_t irc(0); irc<nrc; irc++){
+ iatmp[irc] = idxRow[idx0[irc]];
+ datmp[irc] = zresRow[idx0[irc]];
+ }
+ idxRow[0] = iatmp[0]; zresRow[0] = datmp[0];
+ idxRow[1] = iatmp[1]; zresRow[1] = datmp[1];
+ idxRow[2] = iatmp[2]; zresRow[2] = datmp[2]; // temporary
+ if(TMath::Abs(idxRow[1] - idxRow[0]) != 1){
+ SetErrorMsg(kAttachRowGap);
+ AliDebug(2, Form("Rows attached not continuous. Turn on selection.\n"
+ "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n"
+ "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f\n"
+ "row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f",
+ idxRow[0], ncl[idxRow[0]], zresRow[0],
+ idxRow[1], ncl[idxRow[1]], zresRow[1],
+ idxRow[2], ncl[idxRow[2]], zresRow[2]));
+ if(TMath::Abs(idxRow[0] - idxRow[2]) == 1){ // select second candidate
+ AliDebug(2, "Solved ! Remove second candidate.");
+ nrc = 2;
+ idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap
+ idxRow[2] = -1; zresRow[2] = 999.; // remove
+ } else if(TMath::Abs(idxRow[1] - idxRow[2]) == 1){
+ if(ncl[idxRow[1]]+ncl[idxRow[2]] > ncl[idxRow[0]]){
+ AliDebug(2, "Solved ! Remove first candidate.");
+ nrc = 2;
+ idxRow[0] = idxRow[1]; zresRow[0] = zresRow[1]; // swap
+ idxRow[1] = idxRow[2]; zresRow[1] = zresRow[2]; // swap
+ } else {
+ AliDebug(2, "Solved ! Remove second and third candidate.");
+ nrc = 1;
+ idxRow[1] = -1; zresRow[1] = 999.; // remove
+ idxRow[2] = -1; zresRow[2] = 999.; // remove
+ }
+ } else {
+ AliDebug(2, "Unsolved !!! Remove second and third candidate.");
+ nrc = 1;
+ idxRow[1] = -1; zresRow[1] = 999.; // remove
+ idxRow[2] = -1; zresRow[2] = 999.; // remove
+ }
+ } else { // remove temporary candidate
+ nrc = 2;
+ idxRow[2] = -1; zresRow[2] = 999.;
+ }
+ }
+ }
+ AliDebug(4, Form("Sorted row candidates:\n"
+ " row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f row[%2d] Ncl[%2d] <dz>[cm]=%+8.2f"
+ , idxRow[0], ncl[idxRow[0]], zresRow[0], idxRow[1], idxRow[1]<0?0:ncl[idxRow[1]], zresRow[1]));
+
+ // initialize debug streamer
+ TTreeSRedirector *pstreamer(NULL);
+ if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ // save config. for calibration
+ TVectorD vdy[2], vdx[2], vs2[2];
+ for(Int_t jr(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ vdx[jr].ResizeTo(ncl[ir]); vdy[jr].ResizeTo(ncl[ir]); vs2[jr].ResizeTo(ncl[ir]);
+ for(Int_t ic(ncl[ir]); ic--;){
+ vdx[jr](ic) = xres[ir][ic];
+ vdy[jr](ic) = yres[ir][ic];
+ vs2[jr](ic) = s2y[ir][ic];
+ }
}
- if(kPRINT) printf("\tir[%d] lr[%d] n[%d]\n", ir, lr, ncl[ir]);
- // Evaluate truncated mean on the y direction
- if(ncl[ir] > 3) AliMathBase::EvaluateUni(ncl[ir], yres[ir], mean, syDis, Int_t(ncl[ir]*.8));
- else {
- mean = 0.; syDis = 0.;
- }
-
- // TODO check mean and sigma agains cluster resolution !!
- if(kPRINT) printf("\tr[%2d] m[%f %5.3fsigma] s[%f]\n", ir, mean, TMath::Abs(mean/syRef), syDis);
- // select clusters on a 3 sigmaDistr level
- Bool_t kFOUND = kFALSE;
- for(Int_t ic = ncl[ir]; ic--;){
- if(yres[ir][ic] - mean > 3. * syDis){
- clst[ir][ic] = 0x0; continue;
+ (*pstreamer) << "AttachClusters4"
+ << "r0=" << idxRow[0]
+ << "dz0=" << zresRow[0]
+ << "dx0=" << &vdx[0]
+ << "dy0=" << &vdy[0]
+ << "s20=" << &vs2[0]
+ << "r1=" << idxRow[1]
+ << "dz1=" << zresRow[1]
+ << "dx1=" << &vdx[1]
+ << "dy1=" << &vdy[1]
+ << "s21=" << &vs2[1]
+ << "\n";
+ vdx[0].Clear(); vdy[0].Clear(); vs2[0].Clear();
+ vdx[1].Clear(); vdy[1].Clear(); vs2[1].Clear();
+ if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 4){
+ Int_t idx(idxRow[1]);
+ if(idx<0){
+ for(Int_t ir(0); ir<kNrows; ir++){
+ if(clst[ir].GetEntries()>0) continue;
+ idx = ir;
+ break;
+ }
+ }
+ (*pstreamer) << "AttachClusters5"
+ << "c0.=" << &clst[idxRow[0]]
+ << "c1.=" << &clst[idx]
+ << "\n";
+ }
+ }
+
+//=======================================================================================
+ // Analyse cluster topology
+ Double_t f[kNcls], // likelihood factors for segments
+ r[2][kNcls], // d(dydx) of tracklet candidate with respect to track
+ xm[2][kNcls], // mean <x>
+ ym[2][kNcls], // mean <y>
+ sm[2][kNcls], // mean <s_y>
+ s[2][kNcls], // sigma_y
+ p[2][kNcls], // prob of Gauss
+ q[2][kNcls]; // charge/segment
+ memset(f, 0, kNcls*sizeof(Double_t));
+ Int_t index[2][kNcls], n[2][kNcls];
+ memset(n, 0, 2*kNcls*sizeof(Int_t));
+ Int_t mts(0), nts[2] = {0, 0}; // no of tracklet segments in row
+ AliTRDpadPlane *pp(AliTRDtransform::Geometry().GetPadPlane(fDet));
+ AliTRDtrackletOflHelper helper;
+ Int_t lyDet(AliTRDgeometry::GetLayer(fDet));
+ for(Int_t jr(0), n0(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ // cluster segmentation
+ Bool_t kInit(kFALSE);
+ if(jr==0){
+ n0 = helper.Init(pp, &clst[ir]); kInit = kTRUE;
+ if(!n0 || (helper.ClassifyTopology() == AliTRDtrackletOflHelper::kNormal)){
+ nts[jr] = 1; memset(index[jr], 0, ncl[ir]*sizeof(Int_t));
+ n[jr][0] = ncl[ir];
}
- nrow[nr]++; kFOUND = kTRUE;
}
- // exit loop
- if(kFOUND) nr++;
- lr = ir; if(nr>=3) break;
- }
- if(kPRINT) printf("lr[%d] nr[%d] nrow[0]=%d nrow[1]=%d nrow[2]=%d\n", lr, nr, nrow[0], nrow[1], nrow[2]);
-
- // classify cluster rows
- Int_t row = -1;
- switch(nr){
- case 1:
- row = lr;
- break;
- case 2:
- SetBit(kRowCross, kTRUE); // mark pad row crossing
- if(nrow[0] > nrow[1]){ row = lr+1; lr = -1;}
- else{
- row = lr; lr = 1;
- nrow[2] = nrow[1];
- nrow[1] = nrow[0];
- nrow[0] = nrow[2];
+ if(!n[jr][0]){
+ nts[jr] = AliTRDtrackletOflHelper::Segmentation(ncl[ir], xres[ir], yres[ir], index[jr]);
+ for(Int_t ic(ncl[ir]);ic--;) n[jr][index[jr][ic]]++;
}
- break;
- case 3:
- SetBit(kRowCross, kTRUE); // mark pad row crossing
- break;
- }
- if(kPRINT) printf("\trow[%d] n[%d]\n\n", row, nrow[0]);
- if(row<0) return kFALSE;
-
- // Select and store clusters
- // We should consider here :
- // 1. How far is the chamber boundary
- // 2. How big is the mean
- Int_t n = 0;
- for (Int_t ir = 0; ir < nr; ir++) {
- Int_t jr = row + ir*lr;
- if(kPRINT) printf("\tattach %d clusters for row %d\n", ncl[jr], jr);
- for (Int_t ic = 0; ic < ncl[jr]; ic++) {
- if(!(c = clst[jr][ic])) continue;
- Int_t it = c->GetPadTime();
- // TODO proper indexing of clusters !!
- fIndexes[it+kNtb*ir] = chamber->GetTB(it)->GetGlobalIndex(idxs[jr][ic]);
- fClusters[it+kNtb*ir] = c;
+ mts += nts[jr];
+
+ // tracklet segment processing
+ for(Int_t its(0); its<nts[jr]; its++){
+ if(n[jr][its]<=2) { // don't touch small segments
+ xm[jr][its] = 0.;ym[jr][its] = 0.;sm[jr][its] = 0.;
+ for(Int_t ic(ncl[ir]); ic--;){
+ if(its != index[jr][ic]) continue;
+ ym[jr][its] += yres[ir][ic];
+ xm[jr][its] += xres[ir][ic];
+ sm[jr][its] += TMath::Sqrt(s2y[ir][ic]);
+ }
+ if(n[jr][its]==2){ xm[jr][its] *= 0.5; ym[jr][its] *= 0.5; sm[jr][its] *= 0.5;}
+ xm[jr][its]= fX0 - xm[jr][its];
+ r[jr][its] = 0.;
+ s[jr][its] = 1.e-5;
+ p[jr][its] = 1.;
+ q[jr][its] = -1.;
+ continue;
+ }
+
+ // for longer tracklet segments
+ if(!kInit) n0 = helper.Init(pp, &clst[ir], index[jr], its);
+ Int_t n1 = helper.GetRMS(r[jr][its], ym[jr][its], s[jr][its], fX0/*xm[jr][its]*/);
+ p[jr][its] = Double_t(n1)/n0;
+ sm[jr][its] = helper.GetSyMean();
+ q[jr][its] = helper.GetQ()/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]);
+ xm[jr][its] = fX0;
+ Double_t dxm= fX0 - xm[jr][its];
+ yt = fYref[0] - fYref[1]*dxm;
+ zt = fZref[0] - fZref[1]*dxm;
+ // correct tracklet fit for tilt
+ ym[jr][its]+= GetTilt()*(zt - zc[ir]);
+ r[jr][its] += GetTilt() * fZref[1];
+ // correct tracklet fit for track position/inclination
+ ym[jr][its] = yt - ym[jr][its];
+ r[jr][its] = (r[jr][its] - fYref[1])/(1+r[jr][its]*fYref[1]);
+ // report inclination in radians
+ r[jr][its] = TMath::ATan(r[jr][its]);
+ if(jr) continue; // calculate only for first row likelihoods
+
+ f[its] = attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n[jr][its], ym[jr][its]/*sRef*/, r[jr][its]*TMath::RadToDeg(), s[jr][its]/sm[jr][its]);
+ }
+ }
+ AliDebug(4, Form(" Tracklet candidates: row[%2d] = %2d row[%2d] = %2d:", idxRow[0], nts[0], idxRow[1], nts[1]));
+ if(AliLog::GetDebugLevel("TRD", "AliTRDseedV1")>3){
+ for(Int_t jr(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ for(Int_t its(0); its<nts[jr]; its++){
+ printf(" segId[%2d] row[%2d] Ncl[%2d] x[cm]=%7.2f dz[pu]=%4.2f dy[mm]=%+7.3f r[deg]=%+6.2f p[%%]=%6.2f s[um]=%7.2f\n",
+ its, ir, n[jr][its], xm[jr][its], zresRow[jr], 1.e1*ym[jr][its], r[jr][its]*TMath::RadToDeg(), 100.*p[jr][its], 1.e4*s[jr][its]);
+ }
+ }
+ }
+ if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 2 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ // save config. for calibration
+ TVectorD vidx, vn, vx, vy, vr, vs, vsm, vp, vf;
+ vidx.ResizeTo(ncl[idxRow[0]]+(idxRow[1]<0?0:ncl[idxRow[1]]));
+ vn.ResizeTo(mts);
+ vx.ResizeTo(mts);
+ vy.ResizeTo(mts);
+ vr.ResizeTo(mts);
+ vs.ResizeTo(mts);
+ vsm.ResizeTo(mts);
+ vp.ResizeTo(mts);
+ vf.ResizeTo(mts);
+ for(Int_t jr(0), jts(0), jc(0); jr<nrc; jr++){
+ Int_t ir(idxRow[jr]);
+ for(Int_t its(0); its<nts[jr]; its++, jts++){
+ vn[jts] = n[jr][its];
+ vx[jts] = xm[jr][its];
+ vy[jts] = ym[jr][its];
+ vr[jts] = r[jr][its];
+ vs[jts] = s[jr][its];
+ vsm[jts]= sm[jr][its];
+ vp[jts] = p[jr][its];
+ vf[jts] = jr?-1.:f[its];
+ }
+ for(Int_t ic(0); ic<ncl[ir]; ic++, jc++) vidx[jc] = index[jr][ic];
+ }
+ (*pstreamer) << "AttachClusters3"
+ << "idx=" << &vidx
+ << "n=" << &vn
+ << "x=" << &vx
+ << "y=" << &vy
+ << "r=" << &vr
+ << "s=" << &vs
+ << "sm=" << &vsm
+ << "p=" << &vp
+ << "f=" << &vf
+ << "\n";
+ }
+
+//=========================================================
+ // Get seed tracklet segment
+ Int_t idx2[kNcls]; memset(idx2, 0, kNcls*sizeof(Int_t)); // seeding indexing
+ if(nts[0]>1) TMath::Sort(nts[0], f, idx2);
+ Int_t is(idx2[0]); // seed index
+ Int_t idxTrklt[kNcls],
+ kts(0),
+ nTrklt(n[0][is]);
+ Double_t fTrklt(f[is]),
+ rTrklt(r[0][is]),
+ yTrklt(ym[0][is]),
+ sTrklt(s[0][is]),
+ smTrklt(sm[0][is]),
+ xTrklt(xm[0][is]),
+ pTrklt(p[0][is]),
+ qTrklt(q[0][is]);
+ memset(idxTrklt, 0, kNcls*sizeof(Int_t));
+ // check seed idx2[0] exit if not found
+ if(f[is]<1.e-2){
+ AliDebug(1, Form("Seed seg[%d] row[%2d] n[%2d] f[%f]<0.01.", is, idxRow[0], n[0][is], f[is]));
+ SetErrorMsg(kAttachClAttach);
+ if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ UChar_t stat(0);
+ if(IsKink()) SETBIT(stat, 1);
+ if(IsStandAlone()) SETBIT(stat, 2);
+ if(IsRowCross()) SETBIT(stat, 3);
+ SETBIT(stat, 4); // set error bit
+ TVectorD vidx; vidx.ResizeTo(1); vidx[0] = is;
+ (*pstreamer) << "AttachClusters2"
+ << "stat=" << stat
+ << "ev=" << ev
+ << "chg=" << chgPos
+ << "det=" << fDet
+ << "x0=" << fX0
+ << "y0=" << fYref[0]
+ << "z0=" << fZref[0]
+ << "phi=" << phiTrk
+ << "tht=" << thtTrk
+ << "pt=" << fPt
+ << "s2Trk=" << s2yTrk
+ << "s2Cl=" << s2Mean
+ << "idx=" << &vidx
+ << "n=" << nTrklt
+ << "f=" << fTrklt
+ << "x=" << xTrklt
+ << "y=" << yTrklt
+ << "r=" << rTrklt
+ << "s=" << sTrklt
+ << "sm=" << smTrklt
+ << "p=" << pTrklt
+ << "q=" << qTrklt
+ << "\n";
+ }
+ return kFALSE;
+ }
+ AliDebug(2, Form("Seed seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%5.3f] q[%6.2f]", is, idxRow[0], n[0][is], ym[0][is], r[0][is]*TMath::RadToDeg(), s[0][is]/sm[0][is], f[is], q[0][is]));
+
+ // save seeding segment in the helper
+ idxTrklt[kts++] = is;
+ helper.Init(pp, &clst[idxRow[0]], index[0], is);
+ AliTRDtrackletOflHelper test; // helper to test segment expantion
+ Float_t rcLikelihood(0.); SetBit(kRowCross, kFALSE);
+ Double_t dyRez[kNcls]; Int_t idx3[kNcls];
+
+ //=========================================================
+ // Define filter parameters from OCDB
+ Int_t kNSgmDy[2]; attach->GetNsgmDy(kNSgmDy[0], kNSgmDy[1]);
+ Float_t kLikeMinRelDecrease[2]; attach->GetLikeMinRelDecrease(kLikeMinRelDecrease[0], kLikeMinRelDecrease[1]);
+ Float_t kRClikeLimit(attach->GetRClikeLimit());
+
+ //=========================================================
+ // Try attaching next segments from first row (if any)
+ if(nts[0]>1){
+ Int_t jr(0), ir(idxRow[jr]);
+ // organize secondary sgms. in decreasing order of their distance from seed
+ memset(dyRez, 0, nts[jr]*sizeof(Double_t));
+ for(Int_t jts(1); jts<nts[jr]; jts++) {
+ Int_t its(idx2[jts]);
+ Double_t rot(TMath::Tan(r[0][is]));
+ dyRez[its] = TMath::Abs(ym[0][is] - ym[jr][its] + rot*(xm[0][is]-xm[jr][its]));
+ }
+ TMath::Sort(nts[jr], dyRez, idx3, kFALSE);
+ for (Int_t jts(1); jts<nts[jr]; jts++) {
+ Int_t its(idx3[jts]);
+ if(dyRez[its] > kNSgmDy[jr]*smTrklt){
+ AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt));
+ continue;
+ }
+
+ test = helper;
+ Int_t n0 = test.Expand(&clst[ir], index[jr], its);
+ Double_t rt, dyt, st, xt, smt, pt, qt, ft;
+ Int_t n1 = test.GetRMS(rt, dyt, st, fX0/*xt*/);
+ pt = Double_t(n1)/n0;
+ smt = test.GetSyMean();
+ qt = test.GetQ()/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]);
+ xt = fX0;
+ // correct position
+ Double_t dxm= fX0 - xt;
+ yt = fYref[0] - fYref[1]*dxm;
+ zt = fZref[0] - fZref[1]*dxm;
+ // correct tracklet fit for tilt
+ dyt+= GetTilt()*(zt - zc[idxRow[0]]);
+ rt += GetTilt() * fZref[1];
+ // correct tracklet fit for track position/inclination
+ dyt = yt - dyt;
+ rt = (rt - fYref[1])/(1+rt*fYref[1]);
+ // report inclination in radians
+ rt = TMath::ATan(rt);
+
+ ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.;
+ Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr]));
+
+ AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].",
+ (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr])));
+ if(kAccept){
+ idxTrklt[kts++] = its;
+ nTrklt = n0;
+ fTrklt = ft;
+ rTrklt = rt;
+ yTrklt = dyt;
+ sTrklt = st;
+ smTrklt= smt;
+ xTrklt = xt;
+ pTrklt = pt;
+ qTrklt = qt;
+ helper.Expand(&clst[ir], index[jr], its);
+ }
+ }
+ }
+
+ //=========================================================
+ // Try attaching next segments from second row (if any)
+ if(nts[1] && (rcLikelihood = zresRow[0]/zresRow[1]) > kRClikeLimit){
+ // organize secondaries in decreasing order of their distance from seed
+ Int_t jr(1), ir(idxRow[jr]);
+ memset(dyRez, 0, nts[jr]*sizeof(Double_t));
+ Double_t rot(TMath::Tan(r[0][is]));
+ for(Int_t jts(0); jts<nts[jr]; jts++) {
+ dyRez[jts] = TMath::Abs(ym[0][is] - ym[jr][jts] + rot*(xm[0][is]-xm[jr][jts]));
+ }
+ TMath::Sort(nts[jr], dyRez, idx3, kFALSE);
+ for (Int_t jts(0); jts<nts[jr]; jts++) {
+ Int_t its(idx3[jts]);
+ if(dyRez[its] > kNSgmDy[jr]*smTrklt){
+ AliDebug(2, Form("Reject seg[%d] row[%2d] n[%2d] dy[%f] > %d*s[%f].", its, idxRow[jr], n[jr][its], dyRez[its], kNSgmDy[jr], kNSgmDy[jr]*smTrklt));
+ continue;
+ }
+
+ test = helper;
+ Int_t n0 = test.Expand(&clst[ir], index[jr], its);
+ Double_t rt, dyt, st, xt, smt, pt, qt, ft;
+ Int_t n1 = test.GetRMS(rt, dyt, st, fX0/*xt*/);
+ pt = Double_t(n1)/n0;
+ smt = test.GetSyMean();
+ qt = test.GetQ()/TMath::Sqrt(1. + fYref[1]*fYref[1] + fZref[1]*fZref[1]);
+ xt = fX0;
+ // correct position
+ Double_t dxm= fX0 - xt;
+ yt = fYref[0] - fYref[1]*dxm;
+ zt = fZref[0] - fZref[1]*dxm;
+ // correct tracklet fit for tilt
+ dyt+= GetTilt()*(zt - zc[idxRow[0]]);
+ rt += GetTilt() * fZref[1];
+ // correct tracklet fit for track position/inclination
+ dyt = yt - dyt;
+ rt = (rt - fYref[1])/(1+rt*fYref[1]);
+ // report inclination in radians
+ rt = TMath::ATan(rt);
+
+ ft = (n0>=2) ? attach->CookLikelihood(chgPos, lyDet, fPt, phiTrk, n0, dyt/*sRef*/, rt*TMath::RadToDeg(), st/smt) : 0.;
+ Bool_t kAccept(ft>=fTrklt*(1.-kLikeMinRelDecrease[jr]));
+
+ AliDebug(2, Form("%s seg[%d] row[%2d] n[%2d] dy[%f] r[%+5.2f] s[%+5.2f] f[%f] < %4.2f*F[%f].",
+ (kAccept?"Adding":"Reject"), its, idxRow[jr], n0, dyt, rt*TMath::RadToDeg(), st/smt, ft, 1.-kLikeMinRelDecrease[jr], fTrklt*(1.-kLikeMinRelDecrease[jr])));
+ if(kAccept){
+ idxTrklt[kts++] = its;
+ nTrklt = n0;
+ fTrklt = ft;
+ rTrklt = rt;
+ yTrklt = dyt;
+ sTrklt = st;
+ smTrklt= smt;
+ xTrklt = xt;
+ pTrklt = pt;
+ qTrklt = qt;
+ helper.Expand(&clst[ir], index[jr], its);
+ SetBit(kRowCross, kTRUE); // mark pad row crossing
+ }
+ }
+ }
+ // clear local copy of clusters
+ for(Int_t ir(0); ir<kNrows; ir++) clst[ir].Clear();
+
+ if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(pstreamer){
+ UChar_t stat(0);
+ if(IsKink()) SETBIT(stat, 1);
+ if(IsStandAlone()) SETBIT(stat, 2);
+ if(IsRowCross()) SETBIT(stat, 3);
+ TVectorD vidx; vidx.ResizeTo(kts);
+ for(Int_t its(0); its<kts; its++) vidx[its] = idxTrklt[its];
+ (*pstreamer) << "AttachClusters2"
+ << "stat=" << stat
+ << "ev=" << ev
+ << "chg=" << chgPos
+ << "det=" << fDet
+ << "x0=" << fX0
+ << "y0=" << fYref[0]
+ << "z0=" << fZref[0]
+ << "phi=" << phiTrk
+ << "tht=" << thtTrk
+ << "pt=" << fPt
+ << "s2Trk=" << s2yTrk
+ << "s2Cl=" << s2Mean
+ << "idx=" << &vidx
+ << "n=" << nTrklt
+ << "q=" << qTrklt
+ << "f=" << fTrklt
+ << "x=" << xTrklt
+ << "y=" << yTrklt
+ << "r=" << rTrklt
+ << "s=" << sTrklt
+ << "sm=" << smTrklt
+ << "p=" << pTrklt
+ << "\n";
+ }
- //printf("\tid[%2d] it[%d] idx[%d]\n", ic, it, fIndexes[it]);
- n++;
+ //=========================================================
+ // Store clusters
+ Int_t nselected(0), nc(0);
+ TObjArray *selected(helper.GetClusters());
+ if(!selected || !(nselected = selected->GetEntriesFast())){
+ AliError("Cluster candidates missing !!!");
+ SetErrorMsg(kAttachClAttach);
+ return kFALSE;
+ }
+ for(Int_t ic(0); ic<nselected; ic++){
+ if(!(c = (AliTRDcluster*)selected->At(ic))) continue;
+ Int_t it(c->GetPadTime()),
+ jr(Int_t(helper.GetRow() != c->GetPadRow())),
+ idx(it+kNtb*jr);
+ if(fClusters[idx]){
+ AliDebug(1, Form("Multiple clusters/tb for D[%03d] Tb[%02d] Row[%2d]", fDet, it, c->GetPadRow()));
+ continue; // already booked
}
- }
+ // TODO proper indexing of clusters !!
+ fIndexes[idx] = chamber->GetTB(it)->GetGlobalIndex(idxs[idxRow[jr]][ic]);
+ fClusters[idx] = c;
+ nc++;
+ }
+ AliDebug(2, Form("Clusters Found[%2d] Attached[%2d] RC[%c]", nselected, nc, IsRowCross()?'y':'n'));
// number of minimum numbers of clusters expected for the tracklet
- if (n < kClmin){
- //AliWarning(Form("Not enough clusters to fit the tracklet %d [%d].", n, kClmin));
+ if (nc < kClmin){
+ AliDebug(1, Form("NOT ENOUGH CLUSTERS %d ATTACHED TO THE TRACKLET [min %d] FROM FOUND %d.", nc, kClmin, ncls));
+ SetErrorMsg(kAttachClAttach);
return kFALSE;
}
- SetN(n);
+ SetN(nc);
// Load calibration parameters for this tracklet
- Calibrate();
+ //Calibrate();
// calculate dx for time bins in the drift region (calibration aware)
- Int_t irp = 0; Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0};
- for (Int_t it = t0; it < AliTRDtrackerV1::GetNTimeBins(); it++) {
+ Float_t x[2] = {0.,0.}; Int_t tb[2]={0,0};
+ for (Int_t it = t0, irp=0; irp<2 && it < AliTRDtrackerV1::GetNTimeBins(); it++) {
if(!fClusters[it]) continue;
x[irp] = fClusters[it]->GetX();
- tb[irp] = it;
+ tb[irp] = fClusters[it]->GetLocalTimeBin();
irp++;
- if(irp==2) break;
}
Int_t dtb = tb[1] - tb[0];
fdX = dtb ? (x[0] - x[1]) / dtb : 0.15;
-
return kTRUE;
}
//
// A.Bercuci <A.Bercuci@gsi.de> Oct 30th 2008
//
- fReconstructor = rec;
+ fkReconstructor = rec;
AliTRDgeometry g;
- AliTRDpadPlane *pp = g.GetPadPlane(fDet);
- fPad[0] = pp->GetLengthIPad();
- fPad[1] = pp->GetWidthIPad();
- fPad[3] = TMath::Tan(TMath::DegToRad()*pp->GetTiltingAngle());
+ SetPadPlane(g.GetPadPlane(fDet));
+
//fSnp = fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);
//fTgl = fZref[1];
Int_t n = 0, nshare = 0, nused = 0;
//____________________________________________________________________
-Bool_t AliTRDseedV1::Fit(Bool_t tilt, Bool_t zcorr)
+Bool_t AliTRDseedV1::Fit(UChar_t opt)
{
- //
- // Linear fit of the tracklet
- //
- // Parameters :
- //
- // Output :
- // True if successful
- //
- // Detailed description
- // 2. Check if tracklet crosses pad row boundary
- // 1. Calculate residuals in the y (r-phi) direction
- // 3. Do a Least Square Fit to the data
- //
+//
+// Linear fit of the clusters attached to the tracklet
+//
+// Parameters :
+// - opt : switch for tilt pad correction of cluster y position. Options are
+// 0 no correction [default]
+// 1 full tilt correction [dz/dx and z0]
+// 2 pseudo tilt correction [dz/dx from pad-chamber geometry]
+//
+// Output :
+// True if successful
+//
+// Detailed description
+//
+// Fit in the xy plane
+//
+// The fit is performed to estimate the y position of the tracklet and the track
+// angle in the bending plane. The clusters are represented in the chamber coordinate
+// system (with respect to the anode wire - see AliTRDtrackerV1::FollowBackProlongation()
+// on how this is set). The x and y position of the cluster and also their variances
+// are known from clusterizer level (see AliTRDcluster::GetXloc(), AliTRDcluster::GetYloc(),
+// AliTRDcluster::GetSX() and AliTRDcluster::GetSY()).
+// If gaussian approximation is used to calculate y coordinate of the cluster the position
+// is recalculated taking into account the track angle. The general formula to calculate the
+// error of cluster position in the gaussian approximation taking into account diffusion and track
+// inclination is given for TRD by:
+// BEGIN_LATEX
+// #sigma^{2}_{y} = #sigma^{2}_{PRF} + #frac{x#delta_{t}^{2}}{(1+tg(#alpha_{L}))^{2}} + #frac{x^{2}tg^{2}(#phi-#alpha_{L})tg^{2}(#alpha_{L})}{12}
+// END_LATEX
+//
+// Since errors are calculated only in the y directions, radial errors (x direction) are mapped to y
+// by projection i.e.
+// BEGIN_LATEX
+// #sigma_{x|y} = tg(#phi) #sigma_{x}
+// END_LATEX
+// and also by the lorentz angle correction
+//
+// Fit in the xz plane
+//
+// The "fit" is performed to estimate the radial position (x direction) where pad row cross happens.
+// If no pad row crossing the z position is taken from geometry and radial position is taken from the xy
+// fit (see below).
+//
+// There are two methods to estimate the radial position of the pad row cross:
+// 1. leading cluster radial position : Here the lower part of the tracklet is considered and the last
+// cluster registered (at radial x0) on this segment is chosen to mark the pad row crossing. The error
+// of the z estimate is given by :
+// BEGIN_LATEX
+// #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12
+// END_LATEX
+// The systematic errors for this estimation are generated by the following sources:
+// - no charge sharing between pad rows is considered (sharp cross)
+// - missing cluster at row cross (noise peak-up, under-threshold signal etc.).
+//
+// 2. charge fit over the crossing point : Here the full energy deposit along the tracklet is considered
+// to estimate the position of the crossing by a fit in the qx plane. The errors in the q directions are
+// parameterized as s_q = q^2. The systematic errors for this estimation are generated by the following sources:
+// - no general model for the qx dependence
+// - physical fluctuations of the charge deposit
+// - gain calibration dependence
+//
+// Estimation of the radial position of the tracklet
+//
+// For pad row cross the radial position is taken from the xz fit (see above). Otherwise it is taken as the
+// interpolation point of the tracklet i.e. the point where the error in y of the fit is minimum. The error
+// in the y direction of the tracklet is (see AliTRDseedV1::GetCovAt()):
+// BEGIN_LATEX
+// #sigma_{y} = #sigma^{2}_{y_{0}} + 2xcov(y_{0}, dy/dx) + #sigma^{2}_{dy/dx}
+// END_LATEX
+// and thus the radial position is:
+// BEGIN_LATEX
+// x = - cov(y_{0}, dy/dx)/#sigma^{2}_{dy/dx}
+// END_LATEX
+//
+// Estimation of tracklet position error
+//
+// The error in y direction is the error of the linear fit at the radial position of the tracklet while in the z
+// direction is given by the cluster error or pad row cross error. In case of no pad row cross this is given by:
+// BEGIN_LATEX
+// #sigma_{y} = #sigma^{2}_{y_{0}} - 2cov^{2}(y_{0}, dy/dx)/#sigma^{2}_{dy/dx} + #sigma^{2}_{dy/dx}
+// #sigma_{z} = Pad_{length}/12
+// END_LATEX
+// For pad row cross the full error is calculated at the radial position of the crossing (see above) and the error
+// in z by the width of the crossing region - being a matter of parameterization.
+// BEGIN_LATEX
+// #sigma_{z} = tg(#theta) #Delta x_{x_{0}}/12
+// END_LATEX
+// In case of no tilt correction (default in the barrel tracking) the tilt is taken into account by the rotation of
+// the covariance matrix. See AliTRDseedV1::GetCovAt() for details.
+//
+// Author
+// A.Bercuci <A.Bercuci@gsi.de>
+ if(!fkReconstructor){
+ AliError("The tracklet needs the reconstruction setup. Please initialize by SetReconstructor().");
+ return kFALSE;
+ }
if(!IsCalibrated()) Calibrate();
+ if(opt>2){
+ AliWarning(Form("Option [%d] outside range [0, 2]. Using default",opt));
+ opt=0;
+ }
const Int_t kClmin = 8;
-
-
- // cluster error parametrization parameters
- // 1. sy total charge
- const Float_t sq0inv = 0.019962; // [1/q0]
- const Float_t sqb = 1.0281564; //[cm]
- // 2. sy for the PRF
- const Float_t scy[AliTRDgeometry::kNlayer][4] = {
- {2.827e-02, 9.600e-04, 4.296e-01, 2.271e-02},
- {2.952e-02,-2.198e-04, 4.146e-01, 2.339e-02},
- {3.090e-02, 1.514e-03, 4.020e-01, 2.402e-02},
- {3.260e-02,-2.037e-03, 3.946e-01, 2.509e-02},
- {3.439e-02,-3.601e-04, 3.883e-01, 2.623e-02},
- {3.510e-02, 2.066e-03, 3.651e-01, 2.588e-02},
- };
-
+ const Float_t kScalePulls = 10.; // factor to scale y pulls - NOT UNDERSTOOD
// get track direction
Double_t y0 = fYref[0];
Double_t dydx = fYref[1];
Double_t z0 = fZref[0];
Double_t dzdx = fZref[1];
- Double_t yt, zt;
- // calculation of tg^2(phi - a_L) and tg^2(a_L)
- Double_t tgg = (dydx-fExB)/(1.+dydx*fExB); tgg *= tgg;
- //Double_t exb2= fExB*fExB;
+ AliTRDtrackerV1::AliTRDLeastSquare fitterY;
+ AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
- //AliTRDtrackerV1::AliTRDLeastSquare fitterZ;
- TLinearFitter fitterY(1, "pol1");
- TLinearFitter fitterZ(1, "pol1");
-
// book cluster information
Double_t qc[kNclusters], xc[kNclusters], yc[kNclusters], zc[kNclusters], sy[kNclusters];
- Int_t ily = AliTRDgeometry::GetLayer(fDet);
- Int_t n = 0;
- AliTRDcluster *c=0x0, **jc = &fClusters[0];
- for (Int_t ic=0; ic<kNtb; ic++, ++jc) {
- //zRow[ic] = -1;
- xc[ic] = -1.;
- yc[ic] = 999.;
- zc[ic] = 999.;
- sy[ic] = 0.;
+ Bool_t tilt(opt==1) // full tilt correction
+ ,pseudo(opt==2) // pseudo tilt correction
+ ,rc(IsRowCross()) // row cross candidate
+ ,kDZDX(IsPrimary());// switch dzdx calculation for barrel primary tracks
+ Int_t n(0); // clusters used in fit
+ AliTRDcluster *c(NULL), *cc(NULL), **jc = &fClusters[0];
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); //the dynamic cast in GetRecoParam is slow, so caching the pointer to it
+
+ const Char_t *tcName[]={"NONE", "FULL", "HALF"};
+ AliDebug(2, Form("Options : TC[%s] dzdx[%c]", tcName[opt], kDZDX?'Y':'N'));
+
+
+ for (Int_t ic=0; ic<kNclusters; ic++, ++jc) {
+ xc[ic] = -1.; yc[ic] = 999.; zc[ic] = 999.; sy[ic] = 0.;
if(!(c = (*jc))) continue;
if(!c->IsInChamber()) continue;
+ // compute pseudo tilt correction
+ if(kDZDX){
+ fZfit[0] = c->GetZ();
+ if(rc){
+ for(Int_t kc=AliTRDseedV1::kNtb; kc<AliTRDseedV1::kNclusters; kc++){
+ if(!(cc=fClusters[kc])) continue;
+ if(!cc->IsInChamber()) continue;
+ fZfit[0] += cc->GetZ(); fZfit[0] *= 0.5;
+ break;
+ }
+ }
+ fZfit[1] = fZfit[0]/fX0;
+ if(rc){
+ fZfit[0] += fZfit[1]*0.5*AliTRDgeometry::CdrHght();
+ fZfit[1] = fZfit[0]/fX0;
+ }
+ kDZDX=kFALSE;
+ }
Float_t w = 1.;
if(c->GetNPads()>4) w = .5;
if(c->GetNPads()>5) w = .2;
- Int_t tb = c->GetLocalTimeBin();
+ // cluster charge
qc[n] = TMath::Abs(c->GetQ());
- // Radial cluster position
- //Int_t jc = TMath::Max(fN-3, 0);
- //xc[fN] = c->GetXloc(fT0, fVD, &qc[jc], &xc[jc]/*, z0 - c->GetX()*dzdx*/);
+ // pad row of leading
+
xc[n] = fX0 - c->GetX();
- //Double_t s2 = fS2PRF + fDiffL*fDiffL*xc[n]/(1.+2.*exb2)+tgg*xc[n]*xc[n]*exb2/12.;
- //yc[fN] = c->GetYloc(s2, GetPadWidth(), xc[fN], fExB);
- yc[n] = c->GetY()-AliTRDcluster::GetYcorr(ily, c->GetCenter());
+ // Recalculate cluster error based on tracking information
+ c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], -1./*zcorr?zt:-1.*/, dydx);
+ c->SetSigmaZ2(fPad[0]*fPad[0]/12.); // for HLT
+ sy[n] = TMath::Sqrt(c->GetSigmaY2());
+
+ yc[n] = recoParam->UseGAUS() ?
+ c->GetYloc(y0, sy[n], GetPadWidth()): c->GetY();
zc[n] = c->GetZ();
- // extrapolated y value for the track
- yt = y0 - xc[n]*dydx;
- // extrapolated z value for the track
- zt = z0 - xc[n]*dzdx;
- // tilt correction
- if(tilt) yc[n] -= GetTilt()*(zc[n] - zt);
-
- // ELABORATE CLUSTER ERROR
- // basic y error (|| to track).
- sy[n] = AliTRDcluster::GetSY(tb, zcorr?zt:-1.);
- //printf("cluster[%d]\n\tsy[0] = %5.3e [um]\n", fN, sy[fN]*1.e4);
- // y error due to total charge
- sy[n] += sqb*(1./qc[n] - sq0inv);
- //printf("\tsy[1] = %5.3e [um]\n", sy[fN]*1.e4);
- // y error due to PRF
- sy[n] += scy[ily][0]*TMath::Gaus(c->GetCenter(), scy[ily][1], scy[ily][2]) - scy[ily][3];
- //printf("\tsy[2] = %5.3e [um]\n", sy[fN]*1.e4);
-
- sy[n] *= sy[n];
-
- // ADD ERROR ON x
- // error of drift length parallel to the track
- Double_t sx = AliTRDcluster::GetSX(tb, zcorr?zt:-1.); // [cm]
- //printf("\tsx[0] = %5.3e [um]\n", sx*1.e4);
- sx *= sx; // square sx
-
- // add error from ExB
- sy[n] += fExB*fExB*sx;
- //printf("\tsy[3] = %5.3e [um^2]\n", sy[fN]*1.e8);
-
- // global radial error due to misalignment/miscalibration
- Double_t sx0 = 0.; sx0 *= sx0;
- // add sx contribution to sy due to track angle
- sy[n] += tgg*(sx+sx0);
- // TODO we should add tilt pad correction here
- //printf("\tsy[4] = %5.3e [um^2]\n", sy[fN]*1.e8);
- c->SetSigmaY2(sy[n]);
-
- sy[n] = TMath::Sqrt(sy[n]);
+ //optional r-phi correction
+ //printf(" n[%2d] yc[%7.5f] ", n, yc[n]);
+ Float_t correction(0.);
+ if(tilt) correction = fPad[2]*(xc[n]*dzdx + zc[n] - z0);
+ else if(pseudo) correction = fPad[2]*(xc[n]*fZfit[1] + zc[n]-fZfit[0]);
+ yc[n]-=correction;
+ //printf("corr(%s%s)[%7.5f] yc1[%7.5f]\n", (tilt?"TC":""), (zcorr?"PC":""), correction, yc[n]);
+
+ AliDebug(5, Form(" tb[%2d] dx[%6.3f] y[%6.2f+-%6.3f]", c->GetLocalTimeBin(), xc[n], yc[n], sy[n]));
fitterY.AddPoint(&xc[n], yc[n], sy[n]);
- fitterZ.AddPoint(&xc[n], qc[n], 1.);
+ if(rc) fitterZ.AddPoint(&xc[n], qc[n]*(ic<kNtb?1.:-1.), 1.);
n++;
}
- // to few clusters
- if (n < kClmin) return kFALSE;
+ // to few clusters
+ if (n < kClmin){
+ AliDebug(1, Form("Not enough clusters to fit. Clusters: Attached[%d] Fit[%d].", GetN(), n));
+ SetErrorMsg(kFitCl);
+ return kFALSE;
+ }
// fit XY
- fitterY.Eval();
- fYfit[0] = fitterY.GetParameter(0);
- fYfit[1] = -fitterY.GetParameter(1);
+ if(!fitterY.Eval()){
+ AliDebug(1, "Fit Y failed.");
+ SetErrorMsg(kFitFailedY);
+ return kFALSE;
+ }
+ fYfit[0] = fitterY.GetFunctionParameter(0);
+ fYfit[1] = -fitterY.GetFunctionParameter(1);
// store covariance
- Double_t *p = fitterY.GetCovarianceMatrix();
- fCov[0] = p[0]; // variance of y0
- fCov[1] = p[1]; // covariance of y0, dydx
- fCov[2] = p[3]; // variance of dydx
+ Double_t p[3];
+ fitterY.GetCovarianceMatrix(p);
+ fCov[0] = kScalePulls*p[1]; // variance of y0
+ fCov[1] = kScalePulls*p[2]; // covariance of y0, dydx
+ fCov[2] = kScalePulls*p[0]; // variance of dydx
// the ref radial position is set at the minimum of
// the y variance of the tracklet
fX = -fCov[1]/fCov[2];
+ fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2];
- // fit XZ
- if(IsRowCross()){
+ Float_t xs=fX+.5*AliTRDgeometry::CamHght();
+ if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){
+ AliDebug(1, Form("Ref radial position ouside chamber x[%5.2f].", fX));
+ SetErrorMsg(kFitFailedY);
+ return kFALSE;
+ }
+
+/* // THE LEADING CLUSTER METHOD for z fit
+ Float_t xMin = fX0;
Int_t ic=n=kNclusters-1; jc = &fClusters[ic];
- for(; ic>kNtb; ic--, --jc){
+ AliTRDcluster *c0 =0x0, **kc = &fClusters[kNtb-1];
+ for(; ic>kNtb; ic--, --jc, --kc){
+ if((c0 = (*kc)) && c0->IsInChamber() && (xMin>c0->GetX())) xMin = c0->GetX();
if(!(c = (*jc))) continue;
if(!c->IsInChamber()) continue;
- qc[n] = TMath::Abs(c->GetQ());
- xc[n] = fX0 - c->GetX();
- zc[n] = c->GetZ();
- fitterZ.AddPoint(&xc[n], -qc[n], 1.);
- n--;
+ zc[kNclusters-1] = c->GetZ();
+ fX = fX0 - c->GetX();
}
- // fit XZ
- fitterZ.Eval();
- if(fitterZ.GetParameter(1)!=0.){
- fX = -fitterZ.GetParameter(0)/fitterZ.GetParameter(1);
- fX=(fX<0.)?0.:fX;
- Float_t dl = .5*AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght();
- fX=(fX> dl)?dl:fX;
- fX+=.055; // TODO to be understood
- }
-
fZfit[0] = .5*(zc[0]+zc[kNclusters-1]); fZfit[1] = 0.;
- fS2Z = 0.02+1.55*fZref[1]; fS2Z *= fS2Z;
+ // Error parameterization
+ fS2Z = fdX*fZref[1];
+ fS2Z *= fS2Z; fS2Z *= 0.2887; // 1/sqrt(12)*/
+
+ // fit QZ
+ if(opt!=1 && IsRowCross()){
+ if(!fitterZ.Eval()) SetErrorMsg(kFitFailedZ);
+ if(!HasError(kFitFailedZ) && TMath::Abs(fitterZ.GetFunctionParameter(1))>1.e-10){
+ // TODO - one has to recalculate xy fit based on
+ // better knowledge of z position
+// Double_t x = -fitterZ.GetFunctionParameter(0)/fitterZ.GetFunctionParameter(1);
+// Double_t z0 = .5*(zc[0]+zc[n-1]);
+// fZfit[0] = z0 + fZfit[1]*x;
+// fZfit[1] = fZfit[0]/fX0;
+// redo fit on xy plane
+ }
+ // temporary external error parameterization
+ fS2Z = 0.05+0.4*TMath::Abs(fZref[1]); fS2Z *= fS2Z;
+ // TODO correct formula
+ //fS2Z = sigma_x*TMath::Abs(fZref[1]);
} else {
- fZfit[0] = zc[0]; fZfit[1] = 0.;
+ //fZfit[0] = zc[0] + dzdx*0.5*AliTRDgeometry::CdrHght();
fS2Z = GetPadLength()*GetPadLength()/12.;
}
- fS2Y = fCov[0] +2.*fX*fCov[1] + fX*fX*fCov[2];
return kTRUE;
}
-/*
-//_____________________________________________________________________________
-void AliTRDseedV1::FitMI()
+//____________________________________________________________________
+Bool_t AliTRDseedV1::FitRobust(Bool_t chg)
{
//
-// Fit the seed.
-// Marian Ivanov's version
+// Linear fit of the clusters attached to the tracklet
//
-// linear fit on the y direction with respect to the reference direction.
-// The residuals for each x (x = xc - x0) are deduced from:
-// dy = y - yt (1)
-// the tilting correction is written :
-// y = yc + h*(zc-zt) (2)
-// yt = y0+dy/dx*x (3)
-// zt = z0+dz/dx*x (4)
-// from (1),(2),(3) and (4)
-// dy = yc - y0 - (dy/dx + h*dz/dx)*x + h*(zc-z0)
-// the last term introduces the correction on y direction due to tilting pads. There are 2 ways to account for this:
-// 1. use tilting correction for calculating the y
-// 2. neglect tilting correction here and account for it in the error parametrization of the tracklet.
- const Float_t kRatio = 0.8;
- const Int_t kClmin = 5;
- const Float_t kmaxtan = 2;
-
- if (TMath::Abs(fYref[1]) > kmaxtan){
- //printf("Exit: Abs(fYref[1]) = %3.3f, kmaxtan = %3.3f\n", TMath::Abs(fYref[1]), kmaxtan);
- return; // Track inclined too much
- }
-
- Float_t sigmaexp = 0.05 + TMath::Abs(fYref[1] * 0.25); // Expected r.m.s in y direction
- Float_t ycrosscor = GetPadLength() * GetTilt() * 0.5; // Y correction for crossing
- Int_t fNChange = 0;
-
- Double_t sumw;
- Double_t sumwx;
- Double_t sumwx2;
- Double_t sumwy;
- Double_t sumwxy;
- Double_t sumwz;
- Double_t sumwxz;
-
- // Buffering: Leave it constant fot Performance issues
- Int_t zints[kNtb]; // Histograming of the z coordinate
- // Get 1 and second max probable coodinates in z
- Int_t zouts[2*kNtb];
- Float_t allowedz[kNtb]; // Allowed z for given time bin
- Float_t yres[kNtb]; // Residuals from reference
- //Float_t anglecor = GetTilt() * fZref[1]; // Correction to the angle
-
- Float_t pos[3*kNtb]; memset(pos, 0, 3*kNtb*sizeof(Float_t));
- Float_t *fX = &pos[0], *fY = &pos[kNtb], *fZ = &pos[2*kNtb];
-
- Int_t fN = 0; AliTRDcluster *c = 0x0;
- fN2 = 0;
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
- yres[i] = 10000.0;
- if (!(c = fClusters[i])) continue;
- if(!c->IsInChamber()) continue;
- // Residual y
- //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + GetTilt()*(fZ[i] - fZref[0]);
- fX[i] = fX0 - c->GetX();
- fY[i] = c->GetY();
- fZ[i] = c->GetZ();
- yres[i] = fY[i] - GetTilt()*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
- zints[fN] = Int_t(fZ[i]);
- fN++;
- }
-
- if (fN < kClmin){
- //printf("Exit fN < kClmin: fN = %d\n", fN);
- return;
- }
- Int_t nz = AliTRDtrackerV1::Freq(fN, zints, zouts, kFALSE);
- Float_t fZProb = zouts[0];
- if (nz <= 1) zouts[3] = 0;
- if (zouts[1] + zouts[3] < kClmin) {
- //printf("Exit zouts[1] = %d, zouts[3] = %d\n",zouts[1],zouts[3]);
- return;
- }
-
- // Z distance bigger than pad - length
- if (TMath::Abs(zouts[0]-zouts[2]) > 12.0) zouts[3] = 0;
-
- Int_t breaktime = -1;
- Bool_t mbefore = kFALSE;
- Int_t cumul[kNtb][2];
- Int_t counts[2] = { 0, 0 };
-
- if (zouts[3] >= 3) {
-
- //
- // Find the break time allowing one chage on pad-rows
- // with maximal number of accepted clusters
- //
- fNChange = 1;
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
- cumul[i][0] = counts[0];
- cumul[i][1] = counts[1];
- if (TMath::Abs(fZ[i]-zouts[0]) < 2) counts[0]++;
- if (TMath::Abs(fZ[i]-zouts[2]) < 2) counts[1]++;
- }
- Int_t maxcount = 0;
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins(); i++) {
- Int_t after = cumul[AliTRDtrackerV1::GetNTimeBins()][0] - cumul[i][0];
- Int_t before = cumul[i][1];
- if (after + before > maxcount) {
- maxcount = after + before;
- breaktime = i;
- mbefore = kFALSE;
- }
- after = cumul[AliTRDtrackerV1::GetNTimeBins()-1][1] - cumul[i][1];
- before = cumul[i][0];
- if (after + before > maxcount) {
- maxcount = after + before;
- breaktime = i;
- mbefore = kTRUE;
- }
- }
- breaktime -= 1;
- }
+// Author
+// A.Bercuci <A.Bercuci@gsi.de>
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
- if (i > breaktime) allowedz[i] = mbefore ? zouts[2] : zouts[0];
- if (i <= breaktime) allowedz[i] = (!mbefore) ? zouts[2] : zouts[0];
- }
+ TTreeSRedirector *pstreamer(NULL);
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
- if (((allowedz[0] > allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] < 0)) ||
- ((allowedz[0] < allowedz[AliTRDtrackerV1::GetNTimeBins()]) && (fZref[1] > 0))) {
- //
- // Tracklet z-direction not in correspondance with track z direction
- //
- fNChange = 0;
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
- allowedz[i] = zouts[0]; // Only longest taken
- }
- }
-
- if (fNChange > 0) {
- //
- // Cross pad -row tracklet - take the step change into account
- //
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
- if (!fClusters[i]) continue;
- if(!fClusters[i]->IsInChamber()) continue;
- if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
- // Residual y
- //yres[i] = fY[i] - fYref[0] - (fYref[1] + anglecor) * fX[i] + GetTilt()*(fZ[i] - fZref[0]);
- yres[i] = fY[i] - GetTilt()*(fZ[i] - (fZref[0] - fX[i]*fZref[1]));
-// if (TMath::Abs(fZ[i] - fZProb) > 2) {
-// if (fZ[i] > fZProb) yres[i] += GetTilt() * GetPadLength();
-// if (fZ[i] < fZProb) yres[i] -= GetTilt() * GetPadLength();
- }
+ // factor to scale y pulls.
+ // ideally if error parametrization correct this is 1.
+ //Float_t lyScaler = 1./(AliTRDgeometry::GetLayer(fDet)+1.);
+ Float_t kScalePulls = 1.;
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if(!calibration){
+ AliWarning("No access to calibration data");
+ } else {
+ // Retrieve the CDB container class with the parametric likelihood
+ const AliTRDCalTrkAttach *attach = calibration->GetAttachObject();
+ if(!attach){
+ AliWarning("No usable AttachClusters calib object.");
+ } else {
+ kScalePulls = attach->GetScaleCov();//*lyScaler;
}
+ // Retrieve chamber status
+ SetChmbGood(calibration->IsChamberGood(fDet));
+ if(!IsChmbGood()) kScalePulls*=10.;
+ }
+ Double_t xc[kNclusters], yc[kNclusters], sy[kNclusters];
+ Int_t n(0), // clusters used in fit
+ row[]={-1, 0}; // pad row spanned by the tracklet
+ AliTRDcluster *c(NULL), **jc = &fClusters[0];
+ for(Int_t ic=0; ic<kNtb; ic++, ++jc) {
+ if(!(c = (*jc))) continue;
+ if(!c->IsInChamber()) continue;
+ if(row[0]<0){
+ fZfit[0] = c->GetZ();
+ fZfit[1] = 0.;
+ row[0] = c->GetPadRow();
+ }
+ xc[n] = c->GetX();
+ yc[n] = c->GetY();
+ sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08;
+ n++;
}
-
- Double_t yres2[kNtb];
- Double_t mean;
- Double_t sigma;
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
- if (!fClusters[i]) continue;
- if(!fClusters[i]->IsInChamber()) continue;
- if (TMath::Abs(fZ[i] - allowedz[i]) > 2) continue;
- yres2[fN2] = yres[i];
- fN2++;
- }
- if (fN2 < kClmin) {
- //printf("Exit fN2 < kClmin: fN2 = %d\n", fN2);
- fN2 = 0;
- return;
- }
- AliMathBase::EvaluateUni(fN2,yres2,mean,sigma, Int_t(fN2*kRatio-2.));
- if (sigma < sigmaexp * 0.8) {
- sigma = sigmaexp;
- }
- //Float_t fSigmaY = sigma;
-
- // Reset sums
- sumw = 0;
- sumwx = 0;
- sumwx2 = 0;
- sumwy = 0;
- sumwxy = 0;
- sumwz = 0;
- sumwxz = 0;
-
- fN2 = 0;
- Float_t fMeanz = 0;
- Float_t fMPads = 0;
- fUsable = 0;
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
- if (!fClusters[i]) continue;
- if (!fClusters[i]->IsInChamber()) continue;
- if (TMath::Abs(fZ[i] - allowedz[i]) > 2){fClusters[i] = 0x0; continue;}
- if (TMath::Abs(yres[i] - mean) > 4.0 * sigma){fClusters[i] = 0x0; continue;}
- SETBIT(fUsable,i);
- fN2++;
- fMPads += fClusters[i]->GetNPads();
- Float_t weight = 1.0;
- if (fClusters[i]->GetNPads() > 4) weight = 0.5;
- if (fClusters[i]->GetNPads() > 5) weight = 0.2;
-
-
- Double_t x = fX[i];
- //printf("x = %7.3f dy = %7.3f fit %7.3f\n", x, yres[i], fY[i]-yres[i]);
-
- sumw += weight;
- sumwx += x * weight;
- sumwx2 += x*x * weight;
- sumwy += weight * yres[i];
- sumwxy += weight * (yres[i]) * x;
- sumwz += weight * fZ[i];
- sumwxz += weight * fZ[i] * x;
+ Double_t corr = fPad[2]*fPad[0];
+ for(Int_t ic=kNtb; ic<kNclusters; ic++, ++jc) {
+ if(!(c = (*jc))) continue;
+ if(!c->IsInChamber()) continue;
+ if(row[1]==0) row[1] = c->GetPadRow() - row[0];
+ xc[n] = c->GetX();
+ yc[n] = c->GetY() + corr*row[1];
+ sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08;
+ n++;
}
-
- if (fN2 < kClmin){
- //printf("Exit fN2 < kClmin(2): fN2 = %d\n",fN2);
- fN2 = 0;
- return;
+ UChar_t status(0);
+ Double_t par[3] = {0.,0.,fX0}, cov[3];
+ if(!AliTRDtrackletOflHelper::Fit(n, xc, yc, sy, par, 1.5, cov)){
+ AliDebug(1, Form("Tracklet fit failed D[%03d].", fDet));
+ SetErrorMsg(kFitCl);
+ return kFALSE;
}
- fMeanz = sumwz / sumw;
- Float_t correction = 0;
- if (fNChange > 0) {
- // Tracklet on boundary
- if (fMeanz < fZProb) correction = ycrosscor;
- if (fMeanz > fZProb) correction = -ycrosscor;
+ fYfit[0] = par[0];
+ fYfit[1] = par[1];
+ // store covariance
+ fCov[0] = kScalePulls*cov[0]; // variance of y0
+ fCov[1] = kScalePulls*cov[2]; // covariance of y0, dydx
+ fCov[2] = kScalePulls*cov[1]; // variance of dydx
+ // the ref radial position is set at the minimum of
+ // the y variance of the tracklet
+ fX = 0.;//-fCov[1]/fCov[2];
+ // check radial position
+ Float_t xs=fX+.5*AliTRDgeometry::CamHght();
+ if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){
+ AliDebug(1, Form("Ref radial position x[%5.2f] ouside D[%3d].", fX, fDet));
+ SetErrorMsg(kFitFailedY);
+ return kFALSE;
+ }
+ fS2Y = fCov[0] + fX*fCov[1];
+ fS2Z = fPad[0]*fPad[0]/12.;
+ AliDebug(2, Form("[I] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[cm]=%6.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)));
+ if(IsRowCross()){
+ Float_t x,z;
+ if(!GetEstimatedCrossPoint(x,z)){
+ AliDebug(2, Form("Failed(I) getting crossing point D[%03d].", fDet));
+ SetErrorMsg(kFitFailedY);
+ return kTRUE;
+ }
+ //if(IsPrimary()){
+ fZfit[0] = fX0*z/x;
+ fZfit[1] = z/x;
+ fS2Z = 0.05+0.4*TMath::Abs(fZfit[1]); fS2Z *= fS2Z;
+ //}
+ AliDebug(2, Form("s2y[%f] s2z[%f]", fS2Y, fS2Z));
+ AliDebug(2, Form("[II] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[um]=%6.2f dzdx[deg]=%+5.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)*1.e4, TMath::ATan(fZfit[1])*TMath::RadToDeg()));
}
-
- Double_t det = sumw * sumwx2 - sumwx * sumwx;
- fYfit[0] = (sumwx2 * sumwy - sumwx * sumwxy) / det;
- fYfit[1] = (sumw * sumwxy - sumwx * sumwy) / det;
-
- fS2Y = 0;
- for (Int_t i = 0; i < AliTRDtrackerV1::GetNTimeBins()+1; i++) {
- if (!TESTBIT(fUsable,i)) continue;
- Float_t delta = yres[i] - fYfit[0] - fYfit[1] * fX[i];
- fS2Y += delta*delta;
- }
- fS2Y = TMath::Sqrt(fS2Y / Float_t(fN2-2));
- // TEMPORARY UNTIL covariance properly calculated
- fS2Y = TMath::Max(fS2Y, Float_t(.1));
- fZfit[0] = (sumwx2 * sumwz - sumwx * sumwxz) / det;
- fZfit[1] = (sumw * sumwxz - sumwx * sumwz) / det;
-// fYfitR[0] += fYref[0] + correction;
-// fYfitR[1] += fYref[1];
-// fYfit[0] = fYfitR[0];
- fYfit[1] = -fYfit[1];
-
- UpdateUsed();
-}*/
+ if(pstreamer){
+ Float_t x= fX0 -fX,
+ y = GetY(),
+ yt = fYref[0]-fX*fYref[1];
+ SETBIT(status, 2);
+ TVectorD vcov(3); vcov[0]=cov[0];vcov[1]=cov[1];vcov[2]=cov[2];
+ Double_t sm(0.), chi2(0.), tmp, dy[kNclusters];
+ for(Int_t ic(0); ic<n; ic++){
+ sm += sy[ic];
+ dy[ic] = yc[ic]-(fYfit[0]+(xc[ic]-fX0)*fYfit[1]); tmp = dy[ic]/sy[ic];
+ chi2 += tmp*tmp;
+ }
+ sm /= n; chi2 = TMath::Sqrt(chi2);
+ Double_t m(0.), s(0.);
+ AliMathBase::EvaluateUni(n, dy, m, s, 0);
+ (*pstreamer) << "FitRobust4"
+ << "stat=" << status
+ << "chg=" << chg
+ << "ncl=" << n
+ << "det=" << fDet
+ << "x0=" << fX0
+ << "y0=" << fYfit[0]
+ << "x=" << x
+ << "y=" << y
+ << "dydx=" << fYfit[1]
+ << "pt=" << fPt
+ << "yt=" << yt
+ << "dydxt="<< fYref[1]
+ << "cov=" << &vcov
+ << "chi2=" << chi2
+ << "sm=" << sm
+ << "ss=" << s
+ << "\n";
+ }
+ return kTRUE;
+}
//___________________________________________________________________
void AliTRDseedV1::Print(Option_t *o) const
AliInfo(Form("Det[%3d] X0[%7.2f] Pad{L[%5.2f] W[%5.2f] Tilt[%+6.2f]}", fDet, fX0, GetPadLength(), GetPadWidth(), GetTilt()));
AliInfo(Form("N[%2d] Nused[%2d] Nshared[%2d] [%d]", GetN(), GetNUsed(), GetNShared(), fN));
AliInfo(Form("FLAGS : RC[%c] Kink[%c] SA[%c]", IsRowCross()?'y':'n', IsKink()?'y':'n', IsStandAlone()?'y':'n'));
+ AliInfo(Form("CALIB PARAMS : T0[%5.2f] Vd[%5.2f] s2PRF[%5.2f] ExB[%5.2f] Dl[%5.2f] Dt[%5.2f]", fT0, fVD, fS2PRF, fExB, fDiffL, fDiffT));
Double_t cov[3], x=GetX();
GetCovAt(x, cov);
AliInfo(" | x[cm] | y[cm] | z[cm] | dydx | dzdx |");
AliInfo(Form("Fit | %7.2f | %7.2f+-%7.2f | %7.2f+-%7.2f| %5.2f | ----- |", x, GetY(), TMath::Sqrt(cov[0]), GetZ(), TMath::Sqrt(cov[2]), fYfit[1]));
- AliInfo(Form("Ref | %7.2f | %7.2f+-%7.2f | %7.2f+-%7.2f| %5.2f | %5.2f |", x, fYref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[2]), fZref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[2]), fYref[1], fZref[1]))
-
+ AliInfo(Form("Ref | %7.2f | %7.2f+-%7.2f | %7.2f+-%7.2f| %5.2f | %5.2f |", x, fYref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[0]), fZref[0]-fX*fYref[1], TMath::Sqrt(fRefCov[2]), fYref[1], fZref[1]));
+ AliInfo(Form("P / Pt [GeV/c] = %f / %f", GetMomentum(), fPt));
+ if(IsStandAlone()) AliInfo(Form("C Rieman / Vertex [1/cm] = %f / %f", fC[0], fC[1]));
+ AliInfo(Form("dEdx [a.u.] = %f / %f / %f / %f / %f/ %f / %f / %f", fdEdx[0], fdEdx[1], fdEdx[2], fdEdx[3], fdEdx[4], fdEdx[5], fdEdx[6], fdEdx[7]));
+ AliInfo(Form("PID = %5.3f / %5.3f / %5.3f / %5.3f / %5.3f", fProb[0], fProb[1], fProb[2], fProb[3], fProb[4]));
if(strcmp(o, "a")!=0) return;
if ( fZref[i] != inTracklet->fZref[i] ) return kFALSE;
}
- if ( fS2Y != inTracklet->fS2Y ) return kFALSE;
- if ( GetTilt() != inTracklet->GetTilt() ) return kFALSE;
- if ( GetPadLength() != inTracklet->GetPadLength() ) return kFALSE;
+ if ( TMath::Abs(fS2Y - inTracklet->fS2Y)>1.e-10 ) return kFALSE;
+ if ( TMath::Abs(GetTilt() - inTracklet->GetTilt())>1.e-10 ) return kFALSE;
+ if ( TMath::Abs(GetPadLength() - inTracklet->GetPadLength())>1.e-10 ) return kFALSE;
for (Int_t i = 0; i < kNclusters; i++){
// if ( fX[i] != inTracklet->GetX(i) ) return kFALSE;
//if ( fFreq != inTracklet->GetFreq() ) return kFALSE;
//if ( fNChange != inTracklet->GetNChange() ) return kFALSE;
- if ( fC != inTracklet->fC ) return kFALSE;
+ if ( TMath::Abs(fC[0] - inTracklet->fC[0])>1.e-10 ) return kFALSE;
//if ( fCC != inTracklet->GetCC() ) return kFALSE;
- if ( fChi2 != inTracklet->fChi2 ) return kFALSE;
+ if ( TMath::Abs(fChi2 - inTracklet->fChi2)>1.e-10 ) return kFALSE;
// if ( fChi2Z != inTracklet->GetChi2Z() ) return kFALSE;
if ( fDet != inTracklet->fDet ) return kFALSE;
- if ( fPt != inTracklet->fPt ) return kFALSE;
- if ( fdX != inTracklet->fdX ) return kFALSE;
+ if ( TMath::Abs(fPt - inTracklet->fPt)>1.e-10 ) return kFALSE;
+ if ( TMath::Abs(fdX - inTracklet->fdX)>1.e-10 ) return kFALSE;
for (Int_t iCluster = 0; iCluster < kNclusters; iCluster++){
AliTRDcluster *curCluster = fClusters[iCluster];
}
return kTRUE;
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff