//
// --- ROOT system ---
+#include "AliMagF.h"
+#include "AliTracker.h"
+#include "AliGeomManager.h"
+#include "AliCluster.h"
+#include "AliKalmanTrack.h"
+#include "AliGlobalQADataMaker.h"
+
+#include "TVector3.h"
#include "TTree.h"
#include "TBenchmark.h"
#include "AliESDtrack.h"
#include "AliPHOSEmcRecPoint.h"
#include "AliPHOSCpvRecPoint.h"
+#include "AliLog.h"
+#include "AliMagF.h"
ClassImp( AliPHOSTrackSegmentMakerv1)
Float_t &dx, Float_t &dz) const
{
// Calculates the distance between the EMC RecPoint and the CPV RecPoint
+ // If no CPV, calculates the distance between the EMC RecPoint and the track
+ // prolongation to the PHOS module plane.
// Clusters are sorted in "rows" and "columns" of width 1 cm
// Float_t delta = 1 ; // Width of the rows in sorting of RecPoints (in cm)
// // if you change this value, change it as well in xxxRecPoint::Compare()
- Float_t distance2Track = fRtpc ;
- trackindex = -1 ; // closest track within fRCpv
+ if(!cpvClu) {
+
+ trackindex = -1;
+ dx=999.;
+ dz=999.;
+
+ if(!emcClu) {
+ return;
+ }
+
+ // *** Start the matching
+ Int_t nt=fESD->GetNumberOfTracks();
+ Int_t iPHOSMod = emcClu->GetPHOSMod() ;
+ //Calculate actual distance to PHOS module
+ TVector3 globaPos ;
+ fGeom->Local2Global(iPHOSMod, 0.,0., globaPos) ;
+ const Double_t rPHOS = globaPos.Pt() ; //Distance to PHOS module
+ const Double_t kYmax = 72.+10. ; //Size of the module (with some reserve) in phi direction
+ const Double_t kZmax = 64.+10. ; //Size of the module (with some reserve) in z direction
+ const Double_t kAlpha= 20./180.*TMath::Pi() ; //TPC sector angular size
+ Double_t minDistance = 1.e6;
+
+ TMatrixF gmat;
+ TVector3 gposRecPoint; // global (in ALICE frame) position of rec. point
+ emcClu->GetGlobalPosition(gposRecPoint,gmat);
+ Double_t gposTrack[3] ;
+
+ Double_t bz = GetBz() ; //B-Field for approximate matching
+ Double_t b[3];
+ for (Int_t i=0; i<nt; i++) {
+ AliESDtrack *esdTrack=fESD->GetTrack(i);
+
+// // Skip the tracks having "wrong" status (has to be checked/tuned)
+// ULong_t status = esdTrack->GetStatus();
+// if ((status & AliESDtrack::kTRDout) == 0) continue;
+// if ((status & AliESDtrack::kTRDrefit) == 1) continue;
+
+ AliExternalTrackParam t(*esdTrack);
+ Int_t isec=Int_t(t.GetAlpha()/kAlpha);
+ Int_t imod=-isec-2; // PHOS module
+
+ Double_t y; // Some tracks do not reach the PHOS
+ if (!t.GetYAt(rPHOS,bz,y)) continue; // because of the bending
+
+ Double_t z; t.GetZAt(rPHOS,bz,z);
+ if (TMath::Abs(z) > kZmax) continue; // Some tracks miss the PHOS in Z
+
+ Bool_t ok=kTRUE;
+ while (TMath::Abs(y) > kYmax) { // Find the matching module
+ Double_t alp=t.GetAlpha();
+ if (y > kYmax) {
+ if (!t.Rotate(alp+kAlpha)) {ok=kFALSE; break;}
+ imod--;
+ } else if (y < -kYmax) {
+ if (!t.Rotate(alp-kAlpha)) {ok=kFALSE; break;}
+ imod++;
+ }
+ if (!t.GetYAt(rPHOS,bz,y)) {ok=kFALSE; break;}
+ }
+ if (!ok) continue; // Track rotation failed
+
+
+ if(imod!= iPHOSMod-1)
+ continue; //not even approximate coincidence
+
+ //t.CorrectForMaterial(...); // Correct for the TOF material, if needed
+ t.GetBxByBz(b) ;
+ t.PropagateToBxByBz(rPHOS,b); // Propagate to the matching module
+ t.GetXYZ(gposTrack) ;
+
+ Double_t ddx = gposTrack[0] - gposRecPoint.X(), ddy = gposTrack[1] - gposRecPoint.Y(), ddz = gposTrack[2] - gposRecPoint.Z();
+ Double_t d2 = ddx*ddx + ddy*ddy + ddz*ddz;
+ if(d2 < minDistance) {
+ dx = TMath::Sign(TMath::Sqrt(ddx*ddx + ddy*ddy),ddx) ;
+ dz = ddz ;
+ trackindex=i;
+ minDistance=d2 ;
+ }
+ }
+ return ;
+ }
+
+ TVector3 emcGlobal;
+ fGeom->GetGlobalPHOS((AliPHOSRecPoint*)emcClu,emcGlobal);
+
+ // Radius from IP to current point
+ Double_t rEMC = TMath::Abs(emcGlobal.Pt());
+
+ // Extrapolate the global track direction to EMC
+ // and find the closest track
+
+ Int_t nTracks = fESD->GetNumberOfTracks();
+
+ AliESDtrack *track;
+ Double_t xyz[] = {-1,-1,-1};
+ Double_t pxyz[3];
+ Double_t zEMC,xEMC;
+ Int_t module;
+ TVector3 vecP;
+ TVector3 locClu;
+
+ Float_t minDistance = 1.e6;
+ Float_t dr;
+
+ for (Int_t iTrack=0; iTrack<nTracks; iTrack++) {
+ track = fESD->GetTrack(iTrack);
+ if (!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)) continue;
+
+ AliDebug(1,Form("Event %d, iTrack: %d, (%.3f,%.3f,%.3f)",
+ fESD->GetEventNumberInFile(),iTrack,xyz[0],xyz[1],xyz[2]));
+
+ if (track->GetPxPyPzAt(rEMC,fESD->GetMagneticField(),pxyz)) {
+
+ vecP.SetXYZ(pxyz[0],pxyz[1],pxyz[2]);
+ fGeom->ImpactOnEmc(xyz,vecP.Theta(),vecP.Phi(),module,zEMC,xEMC) ;
+
+ if(!module) continue;
+ AliDebug(1,Form("\t\tTrack hit PHOS! Module: %d, (x,z)=(%.3f,%.3f)",module,xEMC,zEMC));
+
+ if(emcClu->GetPHOSMod() != module) continue;
+
+ // match track to EMC cluster
+ emcClu->GetLocalPosition(locClu);
+
+ Float_t delta_x = xEMC - locClu.X();
+ Float_t delta_z = zEMC - locClu.Z();
+ dr = TMath::Sqrt(delta_x*delta_x + delta_z*delta_z);
+ AliDebug(1,Form("\tMatch iTrack=%d: (dx,dz)=(%.3f,%.3f)",iTrack,delta_x,delta_z));
+
+ if(dr<minDistance) {
+ trackindex = iTrack;
+ minDistance = dr;
+ dx = delta_x;
+ dz = delta_z;
+ }
+ }
+
+ }
+
+ if(trackindex>=0)
+ AliDebug(1,Form("\t\tBest match for (xClu,zClu,eClu)=(%.3f,%.3f,%.3f): iTrack=%d, dR=%.3f",
+ locClu.X(),locClu.Z(),emcClu->GetEnergy(),
+ trackindex,TMath::Sqrt(dx*dx+dz*dz)));
+ return;
+
+ Float_t distance2Track = fRtpc ;
+
+ trackindex = -1 ; // closest track within fRCpv
+
TVector3 vecEmc ; // Local position of EMC recpoint
- TVector3 vecP ; // Momentum direction at CPV plain
TVector3 vecPloc ; // Momentum direction at CPV plain
//toofar = kTRUE ;
dz=999. ;
return ;
}
-
+
emcClu->GetLocalPosition(vecEmc) ;
-
+
Double_t xCPV,zCPV ; //EMC-projected coordinates of CPV cluster
TVector3 cpvGlobal; // Global position of the CPV recpoint
fGeom->GetGlobalPHOS((AliPHOSRecPoint*)cpvClu,cpvGlobal);
Int_t dummyMod ;
if (fESD == 0x0) {
- //if no track information available, assume straight line from IP to emcal
- fGeom->ImpactOnEmc(vtxCPV,cpvGlobal.Theta(),cpvGlobal.Phi(),dummyMod,zCPV,xCPV) ;
- dx=xCPV - vecEmc.X() ;
- dz=zCPV - vecEmc.Z() ;
- return ;
+ //if no track information available, assume straight line from IP to emcal
+ fGeom->ImpactOnEmc(vtxCPV,cpvGlobal.Theta(),cpvGlobal.Phi(),dummyMod,zCPV,xCPV) ;
+ dx=xCPV - vecEmc.X() ;
+ dz=zCPV - vecEmc.Z() ;
+ return ;
}
-
+
//if there is ESD try to correct distance using TPC information on particle direct in CPV
if (fESD != 0x0) {
for (Int_t iTrack=0; iTrack<nTracks; iTrack++) {
track = fESD->GetTrack(iTrack);
if (!track->GetXYZAt(rCPV, fESD->GetMagneticField(), xyz))
- continue; //track coord on the cylinder of PHOS radius
+ continue; //track coord on the cylinder of PHOS radius
if ((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0)
- continue;
+ continue;
//Check if this track hits PHOS
inPHOS.SetXYZ(xyz[0],xyz[1],xyz[2]);
distance2Track = inPHOS.Angle(cpvGlobal) ;
// Find the closest track to the CPV recpoint
if (distance2Track < minDistance) {
- minDistance = distance2Track;
- iClosestTrack = iTrack;
+ minDistance = distance2Track;
+ iClosestTrack = iTrack;
}
}
Int_t iEmcRP ;
for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){
if(emcExist[iEmcRP] > 0 ){
- new ((*fTrackSegments)[fNTrackSegments])
- AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP+fEmcFirst)),
- nullpointer) ;
- (dynamic_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
- fNTrackSegments++;
+ Int_t track = -1 ;
+ Float_t dx,dz ;
+ AliPHOSEmcRecPoint *emcclu = dynamic_cast<AliPHOSEmcRecPoint *>(fEMCRecPoints->At(iEmcRP+fEmcFirst));
+ GetDistanceInPHOSPlane(emcclu, 0, track,dx,dz);
+ if(track<0)
+ new ((*fTrackSegments)[fNTrackSegments]) AliPHOSTrackSegment(emcclu,nullpointer) ;
+ else
+ new ((*fTrackSegments)[fNTrackSegments]) AliPHOSTrackSegment(emcclu,0,track,dx,dz);
+ (dynamic_cast<AliPHOSTrackSegment *>(fTrackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
+ fNTrackSegments++;
}
}
}
fTrackSegments->Clear();
// if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent
-
+
for(fModule = 1; fModule <= fGeom->GetNModules() ; fModule++ ) {
FillOneModule() ;
MakeLinks() ;
}
}
}
+//__________________________________________________________________________
+Double_t AliPHOSTrackSegmentMakerv1::GetBz()const
+{
+ Double_t kAlmost0Field=1.e-13;
+ AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField();
+ if (!fld) return 0.5*kAlmost0Field;
+ Double_t bz = fld->SolenoidField();
+ return TMath::Sign(0.5*kAlmost0Field,bz) + bz;
+}
+//__________________________________________________________________________
+void AliPHOSTrackSegmentMakerv1::GetBxByBz(const Double_t r[3], Double_t b[3])const {
+ //------------------------------------------------------------------
+ // Returns Bx, By and Bz (kG) at the point "r" .
+ //------------------------------------------------------------------
+ Double_t kAlmost0Field=1.e-13;
+ AliMagF* fld = (AliMagF*)TGeoGlobalMagField::Instance()->GetField();
+ if (!fld) {
+ b[0] = b[1] = 0.;
+ b[2] = 0.5*kAlmost0Field;
+ return;
+ }
+
+ if (fld->IsUniform()) {
+ b[0] = b[1] = 0.;
+ b[2] = fld->SolenoidField();
+ } else {
+ fld->Field(r,b);
+ }
+ b[2] = (TMath::Sign(0.5*kAlmost0Field,b[2]) + b[2]);
+ return;
+}
+
+
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