+ //
+ // Stack filling loop
+ //
+ fNprimaries = 0;
+ for (i = 0; i < nTracks; i++) {
+ TParticle* iparticle = fReader->NextParticle();
+ Bool_t selected = KinematicSelection(iparticle,0);
+ if (!selected) continue;
+ p[0] = iparticle->Px();
+ p[1] = iparticle->Py();
+ p[2] = iparticle->Pz();
+ Int_t idpart = iparticle->GetPdgCode();
+ if(fVertexSmear==kPerTrack)
+ {
+ Rndm(random,6);
+ for (j = 0; j < 3; j++) {
+ origin[j]=fOrigin[j]+
+ fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
+ TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
+ }
+ } else {
+ origin[0] = fVertex[0] + iparticle->Vx();
+ origin[1] = fVertex[1] + iparticle->Vy();
+ origin[2] = fVertex[2] + iparticle->Vz();
+ }
+
+ Int_t decayed = iparticle->GetFirstDaughter();
+ Int_t doTracking = fTrackIt && (decayed < 0) && (TMath::Abs(idpart) > 10) && selected;
+ Int_t parent = iparticle->GetFirstMother();
+
+ PushTrack(doTracking,parent,idpart,p,origin,polar,0,kPPrimary,nt);
+ KeepTrack(nt);
+ fNprimaries++;
+ } // track loop
+
+ // Generated event header
+
+ AliGenEventHeader * header = new AliGenEventHeader();
+ header->SetNProduced(fNprimaries);
+ header->SetPrimaryVertex(fVertex);
+ AddHeader(header);
+ break;
+
+ } // event loop
+
+ SetHighWaterMark(nt);
+ CdEventFile();
+}