//_________________________________________________________________________
// Implementation version 1 of algorithm class to construct PHOS track segments
// Track segment for PHOS is list of
-// EMC RecPoint + (possibly) CPV RecPoint + (possibly) PPSD RecPoint
+// EMC RecPoint + (possibly) CPV RecPoint
// To find TrackSegments we do the following:
// for each EMC RecPoints we look at
-// CPV/PPSD RecPoints in the radious fRcpv.
+// CPV RecPoints in the radious fRcpv.
// If there is such a CPV RecPoint,
-// we make "Link" it is just indexes of EMC and CPV/PPSD RecPoint and distance
+// we make "Link" it is just indexes of EMC and CPV RecPoint and distance
// between them in the PHOS plane.
// Then we sort "Links" and starting from the
// least "Link" pointing to the unassined EMC and CPV RecPoints assing them to
// new TrackSegment.
-// If there is no CPV/PPSD RecPoint we make TrackSegment
+// If there is no CPV RecPoint we make TrackSegment
// consisting from EMC alone. There is no TrackSegments without EMC RecPoint.
-//// In principle this class should be called from AliPHOSReconstructioner, but
+//// In principle this class should be called from AliPHOSReconstructor, but
// one can use it as well in standalone mode.
// Use case:
// root [0] AliPHOSTrackSegmentMakerv1 * t = new AliPHOSTrackSegmentMaker("galice.root", "tracksegmentsname", "recpointsname")
// // reads gAlice from header file "galice.root", uses recpoints stored in the branch names "recpointsname" (default = "Default")
// // and saves recpoints in branch named "tracksegmentsname" (default = "recpointsname")
// root [1] t->ExecuteTask()
-// root [2] t->SetMaxEmcPpsdDistance(5)
// root [3] t->SetTrackSegmentsBranch("max distance 5 cm")
// root [4] t->ExecuteTask("deb all time")
//
#include "TBenchmark.h"
// --- Standard library ---
-
+#include "Riostream.h"
// --- AliRoot header files ---
#include "AliPHOSGeometry.h"
#include "AliPHOSTrackSegmentMakerv1.h"
#include "AliPHOSTrackSegment.h"
#include "AliPHOSLink.h"
#include "AliPHOSGetter.h"
+#include "AliESD.h"
+#include "AliESDtrack.h"
ClassImp( AliPHOSTrackSegmentMakerv1)
InitParameters() ;
Init() ;
fDefaultInit = kFALSE ;
+ fESD = 0;
}
//____________________________________________________________________________
}
//____________________________________________________________________________
-Float_t AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcClu,AliPHOSRecPoint * cpvClu, Bool_t &toofar)const
+Float_t AliPHOSTrackSegmentMakerv1::GetDistanceInPHOSPlane(AliPHOSEmcRecPoint * emcClu,AliPHOSCpvRecPoint * cpvClu, Int_t &trackindex) const
{
- // Calculates the distance between the EMC RecPoint and the PPSD RecPoint
+ // Calculates the distance between the EMC RecPoint and the CPV RecPoint
// 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)
+ //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 r = fRcpv ;
-
- TVector3 vecEmc ;
- TVector3 vecCpv ;
+ Float_t distance2Cpv = fRcpv ;
+ Float_t distance2Track = fRtpc ;
+
+ trackindex = -1 ; // closest track within fRCpv
+
+ TVector3 vecEmc ; // Local position of EMC recpoint
+ TVector3 vecCpv ; // Local position of CPV recpoint propagated to EMC
+ TVector3 vecDist ; // Distance between local positions of two points
emcClu->GetLocalPosition(vecEmc) ;
- cpvClu->GetLocalPosition(vecCpv) ;
+ cpvClu->GetLocalPosition(vecCpv) ;
+ //toofar = kTRUE ;
if(emcClu->GetPHOSMod() == cpvClu->GetPHOSMod()){
- if(vecCpv.X() <= vecEmc.X() + fRcpv + 2*delta ){
- vecCpv = vecCpv - vecEmc ;
- r = vecCpv.Mag() ;
- toofar = kFALSE ;
+ // Find EMC-CPV distance
+ distance2Cpv = (vecCpv - vecEmc).Mag() ;
+
+ if (fESD != 0x0) {
+ // 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 = 1e6;
+ Double_t pxyz[3], xyz[3];
+ AliESDtrack *track;
+ for (Int_t iTrack=0; iTrack<nTracks; iTrack++) {
+ track = fESD->GetTrack(iTrack);
+ if (track->IsPHOS())
+ continue ;
+ track->GetOuterXYZ(xyz, "PHOS"); // track coord on the cylinder of PHOS radius
+ if ((TMath::Abs(xyz[0])+TMath::Abs(xyz[1])+TMath::Abs(xyz[2]))<=0)
+ continue;
+ track->GetOuterPxPyPz(pxyz, "PHOS"); // track momentum ibid.
+ vecDist = PropagateToPlane(xyz,pxyz,"CPV",cpvClu->GetPHOSMod());
+ // Info("GetDistanceInPHOSPlane","Track %d propagation to CPV = (%f,%f,%f)",
+ // iTrack,vecDist.X(),vecDist.Y(),vecDist.Z());
+ vecDist -= vecCpv;
+ distance2Track = TMath::Sqrt(vecDist.X()*vecDist.X() + vecDist.Z()*vecDist.Z());
+ // Find the closest track to the EMC recpoint
+ if (distance2Track < minDistance) {
+ minDistance = distance2Track;
+ iClosestTrack = iTrack;
+ }
+ }
+
+ if (iClosestTrack != -1) {
+ track = fESD->GetTrack(iClosestTrack);
+ track->GetOuterPxPyPz(pxyz, "PHOS"); // track momentum ibid.
+ TVector3 vecCpvGlobal; // Global position of the CPV recpoint
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
+ const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
+ geom->GetGlobal((AliRecPoint*)cpvClu,vecCpvGlobal);
+ for (Int_t ixyz=0; ixyz<3; ixyz++)
+ xyz[ixyz] = vecCpvGlobal[ixyz];
+ vecDist = PropagateToPlane(xyz,pxyz,"EMC",cpvClu->GetPHOSMod());
+// Info("GetDistanceInPHOSPlane","Track %d propagation to EMC = (%f,%f,%f)",
+// iClosestTrack,vecDist.X(),vecDist.Y(),vecDist.Z());
+ vecDist -= vecEmc;
+ distance2Track = TMath::Sqrt(vecDist.X()*vecDist.X() + vecDist.Z()*vecDist.Z());
+ }
+// } else {
+// // If no ESD exists, than simply find EMC-CPV distance
+// distance = (vecCpv - vecEmc).Mag() ;
+
+ //if(distance2Track < fRcpv + 2*delta )
+ if(distance2Track < fRtpc )
+ trackindex = iClosestTrack ;
+ // toofar = kFALSE ;
+ }
+ // Info("GetDistanceInPHOSPlane","cpv-emc distance is %f cm",
+ // distance);
+ }
+
+ return distance2Cpv ;
+}
- } // if xPpsd >= xEmc + ...
- else
- toofar = kTRUE ;
- }
- else
- toofar = kTRUE ;
+//____________________________________________________________________________
+TVector3 AliPHOSTrackSegmentMakerv1::PropagateToPlane(Double_t *x, Double_t *p,
+ char *det, Int_t moduleNumber) const
+{
+ // Propagate a straight-line track from the origin point x
+ // along the direction p to the CPV or EMC module moduleNumber
+ // Returns a local position of such a propagation
- //toofar = kFALSE ;
-
-
- return r ;
+ AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
+ const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
+ TVector3 moduleCenter = geom->GetModuleCenter(det,moduleNumber);
+ TVector3 vertex(x);
+ TVector3 direction(p);
+
+// Info("PropagateToCPV","Center of the %s module %d is (%f,%f,%f)",
+// det,moduleNumber,moduleCenter[0],moduleCenter[1],moduleCenter[2]);
+
+ Double_t time = (moduleCenter.Mag2() - vertex.Dot(moduleCenter)) /
+ (direction.Dot(moduleCenter));
+ TVector3 globalIntersection = vertex + direction*time;
+ return geom->Global2Local(globalIntersection,moduleNumber);
}
//____________________________________________________________________________
void AliPHOSTrackSegmentMakerv1::InitParameters()
{
//Initializes parameters
- fRcpv = 10. ;
+ fRcpv = 10. ;
+ fRtpc = 4. ;
fEmcFirst = 0 ;
fEmcLast = 0 ;
fCpvFirst = 0 ;
fCpvLast = 0 ;
fLinkUpArray = 0 ;
fTrackSegmentsInRun = 0 ;
+ SetEventRange(0,-1) ;
}
//____________________________________________________________________________
void AliPHOSTrackSegmentMakerv1::MakeLinks()const
{
- // Finds distances (links) between all EMC and PPSD clusters,
+ // Finds distances (links) between all EMC and CPV clusters,
// which are not further apart from each other than fRcpv
// and sort them in accordance with this distance
fLinkUpArray->Clear() ;
- AliPHOSRecPoint * cpv ;
+ AliPHOSCpvRecPoint * cpv ;
AliPHOSEmcRecPoint * emcclu ;
Int_t iLinkUp = 0 ;
for(iEmcRP = fEmcFirst; iEmcRP < fEmcLast; iEmcRP++ ) {
emcclu = dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(iEmcRP)) ;
- Bool_t toofar ;
+ //Bool_t toofar ;
Int_t iCpv = 0 ;
for(iCpv = fCpvFirst; iCpv < fCpvLast;iCpv++ ) {
- cpv = dynamic_cast<AliPHOSRecPoint *>(cpvRecPoints->At(iCpv)) ;
- Float_t r = GetDistanceInPHOSPlane(emcclu, cpv, toofar) ;
-
- if(toofar)
- break ;
+ cpv = dynamic_cast<AliPHOSCpvRecPoint *>(cpvRecPoints->At(iCpv)) ;
+ Int_t track = -1 ;
+ Float_t r = GetDistanceInPHOSPlane(emcclu, cpv, track) ;
+ // if(toofar)
+ // continue ;
if(r < fRcpv) {
- new ((*fLinkUpArray)[iLinkUp++]) AliPHOSLink(r, iEmcRP, iCpv) ;
+ new ((*fLinkUpArray)[iLinkUp++]) AliPHOSLink(r, iEmcRP, iCpv, track) ;
}
}
}
AliPHOSLink * linkUp ;
- AliPHOSRecPoint * nullpointer = 0 ;
+ AliPHOSCpvRecPoint * nullpointer = 0 ;
while ( (linkUp = static_cast<AliPHOSLink *>(nextUp()) ) ){
- if(emcExist[linkUp->GetEmc()-fEmcFirst] != -1){ //without ppsd Up yet
+ if(emcExist[linkUp->GetEmc()-fEmcFirst] != -1){
- if(cpvExist[linkUp->GetPpsd()-fCpvFirst]){ //CPV still exist
-
- new ((* trackSegments)[fNTrackSegments])
- AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(linkUp->GetEmc())) ,
- dynamic_cast<AliPHOSRecPoint *>(cpvRecPoints->At(linkUp->GetPpsd()))) ;
+ if(cpvExist[linkUp->GetCpv()-fCpvFirst]){ //CPV still exist
+ new ((* trackSegments)[fNTrackSegments])
+ AliPHOSTrackSegment(dynamic_cast<AliPHOSEmcRecPoint *>(emcRecPoints->At(linkUp->GetEmc())) ,
+ dynamic_cast<AliPHOSCpvRecPoint *>(cpvRecPoints->At(linkUp->GetCpv())) ,
+ linkUp->GetTrack()) ;
+
(dynamic_cast<AliPHOSTrackSegment *>(trackSegments->At(fNTrackSegments)))->SetIndexInList(fNTrackSegments);
fNTrackSegments++ ;
-
emcExist[linkUp->GetEmc()-fEmcFirst] = -1 ; //Mark emc that Cpv was found
//mark CPV recpoint as already used
- cpvExist[linkUp->GetPpsd()-fCpvFirst] = kFALSE ;
- } //if ppsdUp still exist
+ cpvExist[linkUp->GetCpv()-fCpvFirst] = kFALSE ;
+ } //if CpvUp still exist
}
}
- //look through emc recPoints left without CPV/PPSD
+ //look through emc recPoints left without CPV
if(emcExist){ //if there is emc rec point
Int_t iEmcRP ;
for(iEmcRP = 0; iEmcRP < fEmcLast-fEmcFirst ; iEmcRP++ ){
}
//____________________________________________________________________________
-void AliPHOSTrackSegmentMakerv1::Exec(Option_t * option)
+void AliPHOSTrackSegmentMakerv1::Exec(Option_t *option)
{
- // STEERing method
+ // Steering method to perform track segment construction for events
+ // in the range from fFirstEvent to fLastEvent.
+ // This range is optionally set by SetEventRange().
+ // if fLastEvent=-1 (by default), then process events until the end.
if(strstr(option,"tim"))
gBenchmark->Start("PHOSTSMaker");
return ;
}
- AliPHOSGetter * gime = AliPHOSGetter::Instance() ;
-
+ AliPHOSGetter * gime = AliPHOSGetter::Instance(GetTitle()) ;
+
const AliPHOSGeometry * geom = gime->PHOSGeometry() ;
- Int_t nevents = gime->MaxEvent() ;
- Int_t ievent ;
+ if (fLastEvent == -1)
+ fLastEvent = gime->MaxEvent() - 1 ;
+ else
+ fLastEvent = TMath::Min(fFirstEvent,gime->MaxEvent());
+ Int_t nEvents = fLastEvent - fFirstEvent + 1;
- for(ievent = 0; ievent < nevents; ievent++) {
+ Int_t ievent ;
+ for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
gime->Event(ievent,"R") ;
- //Make some initializations
+ //Make some initializations
fNTrackSegments = 0 ;
fEmcFirst = 0 ;
fEmcLast = 0 ;
//increment the total number of track segments per run
fTrackSegmentsInRun += gime->TrackSegments()->GetEntriesFast() ;
-
}
if(strstr(option,"tim")){
gBenchmark->Stop("PHOSTSMaker");
Info("Exec", "took %f seconds for making TS %f seconds per event",
gBenchmark->GetCpuTime("PHOSTSMaker"),
- gBenchmark->GetCpuTime("PHOSTSMaker")/nevents) ;
+ gBenchmark->GetCpuTime("PHOSTSMaker")/nEvents) ;
}
Unload();
}
message = "\n======== AliPHOSTrackSegmentMakerv1 ========\n" ;
message += "Making Track segments\n" ;
message += "with parameters:\n" ;
- message += " Maximal EMC - CPV (PPSD) distance (cm) %f\n" ;
+ message += " Maximal EMC - CPV distance (cm) %f\n" ;
message += "============================================\n" ;
Info("Print", message.Data(),fRcpv) ;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff