Add particles start X,Y

sim/detectors/ecal/CbmEcalAnalysisRe.cxx

@@ -47,6 +47,8 @@ void CbmEcalAnalysisRe::Exec(Option_t* option)
       fM=t->GetMass();
       fE=TMath::Sqrt(fM*fM+fPX*fPX+fPY*fPY+fPZ*fPZ);
       fZ=t->GetStartZ();
+      fsX=t->GetStartX();
+      fsY=t->GetStartY();
     }
     fTree->Fill();
     // cout << "ECALRE: fill tree" << endl;
@@ -66,6 +68,8 @@ void CbmEcalAnalysisRe::InitTree()
   fTree->Branch("x", &fX    , "x/D");
   fTree->Branch("y", &fY    , "y/D");
   fTree->Branch("z", &fZ    , "z/D");
+  fTree->Branch("sx", &fsX    , "sx/D");
+  fTree->Branch("sy", &fsY    , "sy/D");
   fTree->Branch("t", &fT    , "t/D");
   fTree->Branch("ev",&fEv   , "ev/I");
 }

sim/detectors/ecal/CbmEcalAnalysisRe.h

@@ -36,6 +36,8 @@ private:
   Double_t fX;
   Double_t fY;
   Double_t fZ;
+  Double_t fsX;
+  Double_t fsY;
   Double_t fT;
   Double_t fPX;
   Double_t fPY;