--- /dev/null
+/****************************************************************************
+ * This macro is supposed to do reconstruction in the ITS via Kalman *
+ * tracker V2. The ITStracker is feeded with parametrized TPC tracks *
+ * *
+ * It does the following steps: *
+ * 1) TPC tracking parameterization *
+ * 2) ITS cluster finding V2 (via fast points !) *
+ * 3) ITS track finding V2 *
+ * 4) Create a reference file with simulation info (p,PDG...) *
+ * *
+ * (Origin: A.Dainese, Padova, andrea.dainese@pd,infn.it *
+ * from AliBarrelReconstruction.C I.Belikov, CERN, Jouri.Belikov@cern.ch) *
+ ****************************************************************************/
+
+#ifndef __CINT__
+ #include "alles.h"
+ #include "AliMagF.h"
+ #include "AliITS.h"
+ #include "AliITSgeom.h"
+ #include "AliITSRecPoint.h"
+ #include "AliITSclusterV2.h"
+ #include "AliITSsimulationFastPoints.h"
+ #include "AliITStrackerV2.h"
+ #include "AliTPCtrackerParam.h"
+#endif
+
+typedef struct {
+ Int_t lab;
+ Int_t pdg;
+ Int_t mumpdg;
+ Float_t Vx,Vy,Vz;
+ Float_t Px,Py,Pz;
+} RECTRACK;
+
+
+Int_t TPCParamTracks(const Char_t *galice,const Char_t *outname,const Int_t coll,const Double_t Bfield,Int_t n);
+Int_t ITSFindClusters(const Char_t *inname,const Char_t *outname,Int_t n);
+Int_t ITSFindTracks(const Char_t *galice,const Char_t *inname,const Char_t *inname2,const Char_t *outname,Int_t n);
+Int_t ITSMakeRefFile(const Char_t *galice, const Char_t *inname, const Char_t *outname, Int_t n);
+
+Int_t AliBarrelRec_TPCparam(Int_t n=1) {
+ const Char_t *TPCtrkNameS="AliTPCtracksParam.root";
+ const Char_t *galiceName="galice.root";
+ const Char_t *ITSclsName="AliITSclustersV2.root";
+ const Char_t *ITStrkName="AliITStracksV2.root";
+ const Char_t *ITSrefName="ITStracksRefFile.root";
+
+ // set here the code for the type of collision (needed for TPC tracking
+ // parameterization). available collisions:
+ //
+ // coll = 0 -> PbPb6000 (HIJING with b<2fm)
+ const Int_t collcode = 0;
+ // set here the value of the magnetic field
+ const Double_t BfieldValue = 0.4;
+
+
+
+ AliKalmanTrack::SetConvConst(100/0.299792458/BfieldValue);
+
+
+ // ********** Build TPC tracks with parameterization *********** //
+ if (TPCParamTracks(galiceName,TPCtrkNameS,collcode,BfieldValue,n)) {
+ cerr<<"Failed to get TPC hits !\n";
+ return 1;
+ }
+
+
+ // ********** Find ITS clusters *********** //
+ if (ITSFindClusters(galiceName,ITSclsName,n)) {
+ cerr<<"Failed to get ITS clusters !\n";
+ return 1;
+ }
+
+
+ // ********* Find ITS tracks *********** //
+ if (ITSFindTracks(galiceName,TPCtrkNameS,ITSclsName,ITStrkName,n)) {
+ cerr<<"Failed to get ITS tracks !\n";
+ return 1;
+ }
+
+
+ // ********* Make ITS tracks reference file *********** //
+ if (ITSMakeRefFile(galiceName,ITStrkName,ITSrefName,n)) {
+ cerr<<"Failed to get ITS tracks ref file!\n";
+ return 1;
+ }
+
+
+ return 0;
+}
+
+
+Int_t TPCParamTracks(const Char_t *galice, const Char_t *outname,
+ const Int_t coll,const Double_t Bfield,Int_t n) {
+
+ cerr<<"\n*******************************************************************\n";
+ Int_t rc;
+
+ const Char_t *name="TPCParamTracks";
+ cerr<<'\n'<<name<<"...\n";
+ gBenchmark->Start(name);
+
+ TFile *outfile=TFile::Open(outname,"recreate");
+ TFile *infile =TFile::Open(galice);
+
+ AliTPCtrackerParam tracker(coll,Bfield);
+ rc = tracker.BuildTPCtracks(infile,outfile,n);
+
+ delete gAlice; gAlice=0;
+
+ infile->Close();
+ outfile->Close();
+
+ gBenchmark->Stop(name);
+ gBenchmark->Show(name);
+
+ return rc;
+}
+
+Int_t ITSFindClusters(const Char_t *inname, const Char_t *outname, Int_t n) {
+
+
+ cerr<<"\n*******************************************************************\n";
+
+ Int_t rc=0;
+ const Char_t *name="ITSFindClusters";
+ cerr<<'\n'<<name<<"...\n";
+ gBenchmark->Start(name);
+ TFile *out=TFile::Open(outname,"recreate");
+ TFile *in =TFile::Open(inname,"update");
+
+
+ if (!(gAlice=(AliRun*)in->Get("gAlice"))) {
+ cerr<<"Can't get gAlice !\n";
+ return 1;
+ }
+
+
+ AliITS *ITS = (AliITS*)gAlice->GetModule("ITS");
+ if (!ITS) { cerr<<"Can't get the ITS !\n"; return 1;}
+ AliITSgeom *geom=ITS->GetITSgeom();
+ out->cd();
+ geom->Write();
+
+ Int_t ev=0;
+ for (ev = 0; ev<n; ev++){
+ in->cd(); // !!!! MI directory must point to galice. - othervise problem with Tree -connection
+ gAlice->GetEvent(ev);
+ //gAlice->TreeR()->Reset(); //reset reconstructed tree
+
+
+ TTree *pTree=gAlice->TreeR();
+ if (!pTree){
+ gAlice->MakeTree("R");
+ pTree = gAlice->TreeR();
+ }
+ TBranch *branch=pTree->GetBranch("ITSRecPoints");
+ if (!branch) {
+ //if not reconstructed ITS branch do reconstruction
+ ITS->MakeBranch("R",0);
+ //////////////// Taken from ITSHitsToFastPoints.C ///////////////////////
+ for (Int_t i=0;i<3;i++) {
+ ITS->SetSimulationModel(i,new AliITSsimulationFastPoints());
+ }
+ Int_t nsignal=25;
+ Int_t size=-1;
+ Int_t bgr_ev=Int_t(ev/nsignal);
+ ITS->HitsToFastRecPoints(ev,bgr_ev,size," ","All"," ");
+ ///////////////////////////////////////////////////////////////////////
+ gAlice->GetEvent(ev); //MI comment - in HitsToFast... they reset treeR to 0
+ //they overwrite full reconstructed event ???? ... so lets connect TreeR one more
+ //time
+ }
+
+
+
+ out->cd();
+ TClonesArray *clusters=new TClonesArray("AliITSclusterV2",10000);
+ char cname[100];
+ sprintf(cname,"TreeC_ITS_%d",ev);
+
+ TTree *cTree=new TTree(cname,"ITS clusters");
+ cTree->Branch("Clusters",&clusters);
+
+ pTree=gAlice->TreeR();
+ if (!pTree) { cerr<<"Can't get TreeR !\n"; return 1; }
+ branch=pTree->GetBranch("ITSRecPoints");
+ if (!branch) { cerr<<"Can't get ITSRecPoints branch !\n"; return 1;}
+ TClonesArray *points=new TClonesArray("AliITSRecPoint",10000);
+ branch->SetAddress(&points);
+
+ TClonesArray &cl=*clusters;
+ Int_t nclusters=0;
+ Int_t nentr=(Int_t)pTree->GetEntries();
+ AliITSgeom *geom=ITS->GetITSgeom();
+
+ for (Int_t i=0; i<nentr; i++) {
+ if (!pTree->GetEvent(i)) {cTree->Fill(); continue;}
+ Int_t lay,lad,det; geom->GetModuleId(i,lay,lad,det);
+ Float_t x,y,zshift; geom->GetTrans(lay,lad,det,x,y,zshift);
+ Double_t rot[9]; geom->GetRotMatrix(lay,lad,det,rot);
+ Double_t yshift = x*rot[0] + y*rot[1];
+ Int_t ndet=(lad-1)*geom->GetNdetectors(lay) + (det-1);
+ Int_t ncl=points->GetEntriesFast();
+ nclusters+=ncl;
+ Float_t lp[5];
+ Int_t lab[6];
+ for (Int_t j=0; j<ncl; j++) {
+ AliITSRecPoint *p=(AliITSRecPoint*)points->UncheckedAt(j);
+ lp[0]=-p->GetX()-yshift; if (lay==1) lp[0]=-lp[0];
+ lp[1]=p->GetZ()+zshift;
+ lp[2]=p->GetSigmaX2();
+ lp[3]=p->GetSigmaZ2();
+ lp[4]=p->GetQ();
+ lab[0]=p->GetLabel(0);lab[1]=p->GetLabel(1);lab[2]=p->GetLabel(2);
+ lab[3]=ndet;
+
+ Int_t label=lab[0];
+ TParticle *part=(TParticle*)gAlice->Particle(label);
+ label=-3;
+ while (part->P() < 0.005) {
+ Int_t m=part->GetFirstMother();
+ if (m<0) {cerr<<"Primary momentum: "<<part->P()<<endl; break;}
+ label=m;
+ part=(TParticle*)gAlice->Particle(label);
+ }
+ if (lab[1]<0) lab[1]=label;
+ else if (lab[2]<0) lab[2]=label;
+ else cerr<<"No empty labels !\n";
+
+ new(cl[j]) AliITSclusterV2(lab,lp);
+ }
+ cTree->Fill(); clusters->Delete();
+ points->Delete();
+ }
+ cTree->Write();
+ cerr<<"Number of clusters: "<<nclusters<<endl;
+ delete cTree; delete clusters; delete points;
+
+ }
+
+
+ delete gAlice; gAlice=0;
+ in->Close();
+ out->Close();
+ gBenchmark->Stop(name);
+ gBenchmark->Show(name);
+
+ return rc;
+}
+
+Int_t ITSFindTracks(const Char_t *galice, const Char_t * inname,
+ const Char_t *inname2, const Char_t *outname,
+ Int_t n) {
+
+
+ cerr<<"\n*******************************************************************\n";
+
+ Int_t rc=0;
+ const Char_t *name="ITSFindTracks";
+ cerr<<'\n'<<name<<"...\n";
+ gBenchmark->Start(name);
+
+
+ TFile *out=TFile::Open(outname,"recreate");
+ TFile *in =TFile::Open(inname);
+ TFile *in2 =TFile::Open(inname2);
+
+ AliITSgeom *geom=(AliITSgeom*)gFile->Get("AliITSgeom");
+ if (!geom) { cerr<<"can't get ITS geometry !\n"; return 1;}
+
+
+ for (Int_t ev=0; ev<n; ev++){
+ AliITStrackerV2 tracker(geom,ev);
+
+ TArrayF o;
+ o.Set(3);
+ TFile* vtxFile = new TFile(galice);
+ vtxFile->cd();
+ AliHeader* header = 0;
+ TTree* treeE = (TTree*)gDirectory->Get("TE");
+ treeE->SetBranchAddress("Header",&header);
+ treeE->GetEntry(ev);
+ AliGenEventHeader* genHeader = header->GenEventHeader();
+ if(genHeader) {
+ // get primary vertex position
+ genHeader->PrimaryVertex(o);
+ vtxFile->Close();
+ delete header;
+ // set position of primary vertex
+ Double_t vtx[3];
+ vtx[0]=o[0]; vtx[1]=o[1]; vtx[2]=o[2];
+ cerr<<"+++\n+++ Reading primary vertex position from galice.root\n+++\n+++ Setting primary vertex z = "<<vtx[2]<<" cm for ITS tracking\n+++\n";
+ tracker.SetVertex(vtx);
+ }else {
+ cerr<<"+++\n+++ Event header not found in galice.root:\n+++ Primary vertex in (0,0,0) [default]\n+++\n";
+ }
+
+ // setup vertex constraint in the two tracking passes
+ Int_t flags[2];
+ flags[0]=0;
+ tracker.SetupFirstPass(flags);
+ flags[0]=-1;
+ tracker.SetupSecondPass(flags);
+
+ rc=tracker.Clusters2Tracks(in,out);
+
+ }
+
+ delete gAlice; gAlice=0;
+ in->Close();
+ in2->Close();
+ out->Close();
+
+ gBenchmark->Stop(name);
+ gBenchmark->Show(name);
+
+ return rc;
+}
+
+
+Int_t ITSMakeRefFile(const Char_t *galice, const Char_t *inname,
+ const Char_t *outname, Int_t n) {
+
+
+ cerr<<"\n*******************************************************************\n";
+
+ Int_t rc=0;
+ const Char_t *name="ITSMakeRefFile";
+ cerr<<'\n'<<name<<"...\n";
+ gBenchmark->Start(name);
+
+
+ TFile *out = TFile::Open(outname,"recreate");
+ TFile *trk = TFile::Open(inname);
+ TFile *kin = TFile::Open(galice);
+
+
+ // Get gAlice object from file
+ if(!(gAlice=(AliRun*)kin->Get("gAlice"))) {
+ cerr<<"gAlice has not been found on galice.root !\n";
+ return 1;
+ }
+
+
+
+ Int_t label;
+ TParticle *Part;
+ TParticle *Mum;
+ static RECTRACK rectrk;
+
+
+ for(Int_t event=0; event<n; event++){
+
+ AliITStrackV2 *itstrack=0;
+
+ Int_t nparticles=gAlice->GetEvent(event);
+
+ trk->cd();
+
+ // Tree with ITS tracks
+ char tname[100];
+ sprintf(tname,"TreeT_ITS_%d",event);
+
+ TTree *tracktree=(TTree*)trk->Get(tname);
+ TBranch *tbranch=tracktree->GetBranch("tracks");
+ Int_t nentr=(Int_t)tracktree->GetEntries();
+
+ // Tree for true track parameters
+ char ttname[100];
+ sprintf(ttname,"Tree_Ref_%d",event);
+ TTree *reftree = new TTree(ttname,"Tree with true track params");
+ reftree->Branch("rectracks",&rectrk,"lab/I:pdg:Vx/F:Vy:Vz:Px:Py:Pz");
+
+ for (Int_t i=0; i<nentr; i++) {
+ itstrack=new AliITStrackV2;
+ tbranch->SetAddress(&itstrack);
+ tracktree->GetEvent(i);
+ label = TMath::Abs(itstrack->GetLabel());
+
+ Part = (TParticle*)gAlice->Particle(label);
+ rectrk.lab=label;
+ rectrk.pdg=Part->GetPdgCode();
+ if(Part->GetFirstMother()>=0) {
+ Mum = (TParticle*)gAlice->Particle(Part->GetFirstMother());
+ rectrk.mumpdg=Mum->GetPdgCode();
+ } else {
+ rectrk.mumpdg=-1;
+ }
+ rectrk.Vx=Part->Vx();
+ rectrk.Vy=Part->Vy();
+ rectrk.Vz=Part->Vz();
+ rectrk.Px=Part->Px();
+ rectrk.Py=Part->Py();
+ rectrk.Pz=Part->Pz();
+
+ reftree->Fill();
+ }
+
+ out->cd();
+ reftree->Write();
+
+ }
+
+ trk->Close();
+ kin->Close();
+ out->Close();
+
+ gBenchmark->Stop(name);
+ gBenchmark->Show(name);
+
+
+ return rc;
+
+}
+
+
+
+
+
+
+
+
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+
+