print particles in sensitive detecor

include/B1SD.hh

@@ -25,6 +25,7 @@ public:
 private:
   B1HitsCollection* hitCollection;
   G4int HCID;
+  G4int track_id;
 };
 
 #endif

src/B1SD.cc

@@ -19,10 +19,19 @@ B1SD::~B1SD() {
 
 G4bool B1SD::ProcessHits(G4Step* step, G4TouchableHistory* ROhist) {
   G4TouchableHandle touchable = step->GetPreStepPoint()->GetTouchableHandle();
-  B1Hits* hit = new B1Hits();
-  hit->get_track(step);
-  hitCollection->insert(hit);
-  return true;
+  const G4String particle_name = step->GetTrack()->GetDynamicParticle()->GetParticleDefinition()->GetParticleName();
+  //G4cout << particle_def->GetParticleName() << G4endl;
+  G4int track = step->GetTrack()->GetTrackID();
+  if (track != track_id) {
+    B1Hits* hit = new B1Hits();
+    hit->set_partdef(particle_name);
+    hitCollection->insert(hit);
+    track_id = track;
+    return true;
+  } else {
+    return true;
+  }
+
 }
 
 void B1SD::Initialize(G4HCofThisEvent* HCE) {