//
// --- ROOT system ---
+#include "TVector3.h"
#include "TTree.h"
#include "TBenchmark.h"
#include "AliESDtrack.h"
#include "AliPHOSEmcRecPoint.h"
#include "AliPHOSCpvRecPoint.h"
+#include "AliLog.h"
+#include "AliMagF.h"
+#include "AliMagF.h"
+#include "AliTracker.h"
+#include "AliGeomManager.h"
+#include "AliCluster.h"
+#include "AliKalmanTrack.h"
+#include "AliGlobalQADataMaker.h"
+#include "AliVParticle.h"
+
ClassImp( AliPHOSTrackSegmentMakerv1)
// // if you change this value, change it as well in xxxRecPoint::Compare()
if(!cpvClu) {
+
+ trackindex = -1;
+ dx=999.;
+ dz=999.;
+
+ if(!emcClu) {
+ return;
+ }
- TVector3 emcGlobal;
- fGeom->GetGlobalPHOS((AliPHOSRecPoint*)emcClu,emcGlobal);
-
- TVector3 emcLocal;
- emcClu->GetLocalPosition(emcLocal);
+ // *** 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;
- // Radius from IP to current point
- Double_t rEMC = emcGlobal.Pt() ;
+ TMatrixF gmat;
+ TVector3 gposRecPoint; // global (in ALICE frame) position of rec. point
+ emcClu->GetGlobalPosition(gposRecPoint,gmat);
+ Double_t gposTrack[3] ;
+
+ Double_t bz = AliTracker::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
- // Extrapolate the global track direction to EMC
- // and find the closest track
- Int_t nTracks = fESD->GetNumberOfTracks();
- Int_t iClosestTrack = -1;
- Double_t minDistance = 1.e6;
- Float_t delta_x,delta_z,distance2Track;
-
- AliESDtrack *track;
- Double_t xyz[3] ;
+ if(imod!= iPHOSMod-1)
+ continue; //not even approximate coincidence
- for (Int_t iTrack=0; iTrack<nTracks; iTrack++) {
- track = fESD->GetTrack(iTrack);
- if (!track->GetXYZAt(rEMC, fESD->GetMagneticField(), xyz)) continue;
- printf("track prolongation: (%.3f,%.3f,%.3f) emcGlobal: (%.3f,%.3f,%.3f)\n",
- xyz[0], xyz[1],xyz[2],emcGlobal.X(),emcGlobal.Y(),emcGlobal.Z());
+ //t.CorrectForMaterial(...); // Correct for the TOF material, if needed
+ t.GetBxByBz(b) ;
+ t.PropagateToBxByBz(rPHOS,b); // Propagate to the matching module
+ t.GetXYZ(gposTrack) ;
- TVector3 globTrack(xyz);
- TVector3 locTrack;
- Int_t phosMod = emcClu->GetPHOSMod();
- fGeom->Global2Local(locTrack,globTrack,phosMod);
- delta_x = locTrack.X()-emcLocal.X();
- delta_z = locTrack.Z()-emcLocal.Z();
- printf("delta_x: %.3f delta_z: %.3f. PHOS module: %d\n",
- delta_x,delta_z,phosMod);
-
- distance2Track = TMath::Sqrt(delta_x*delta_x + delta_z*delta_z);
-
- if (distance2Track < minDistance) {
- minDistance = distance2Track;
- iClosestTrack = iTrack;
- dx = delta_x;
- dz = delta_z;
+ 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 ;
+ }
- trackindex = iClosestTrack;
- if(trackindex <0) {
- dx=999.;
- dz=999.;
- }
- 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) {
Double_t rCPV = cpvGlobal.Pt() ;// Radius from IP to current point
// Extrapolate the global track direction if any to CPV and find the closest track
- Int_t nTracks = fESD->GetNumberOfTracks();
Int_t iClosestTrack = -1;
- Double_t minDistance = 1.e6;
TVector3 inPHOS ;
- AliESDtrack *track;
- Double_t xyz[3] ;
- Double_t pxyz[3];
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;
}
}
fTrackSegments->Clear();
// if(!ReadRecPoints(ievent)) continue; //reads RecPoints for event ievent
-
+
for(fModule = 1; fModule <= fGeom->GetNModules() ; fModule++ ) {
FillOneModule() ;
MakeLinks() ;
}
}
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff