Initial version

[u/mrichter/AliRoot.git] / TGeant4 / TG4TrackingAction.cxx

diff --git a/TGeant4/TG4TrackingAction.cxx b/TGeant4/TG4TrackingAction.cxx
new file mode 100644 (file)
index 0000000..64cf696
--- /dev/null
+++ b/TGeant4/TG4TrackingAction.cxx
@@ -0,0 +1,85 @@
+// $Id$
+// Category: event
+//
+// See the class description in the header file.
+
+#include "TG4TrackingAction.h"
+#include "TG4StepManager.h"
+#include "TG4VSensitiveDetector.h"
+#include "TG4Globals.h"
+
+TG4TrackingAction::TG4TrackingAction() {
+//
+}
+
+TG4TrackingAction::TG4TrackingAction(const TG4TrackingAction& right) {
+//
+  TG4Globals::Exception("TG4TrackingAction is protected from copying.");
+}
+
+TG4TrackingAction::~TG4TrackingAction() {
+//
+}
+
+// operators
+
+TG4TrackingAction& 
+TG4TrackingAction::operator=(const TG4TrackingAction &right)
+{
+  // check assignement to self
+  if (this == &right) return *this;
+  
+  TG4Globals::Exception("TG4TrackingAction is protected from assigning.");
+
+  return *this;
+}
+
+// public methods
+
+void TG4TrackingAction::PreUserTrackingAction(const G4Track* track)
+{
+// Called by G4 kernel before starting tracking.
+// ---
+
+  // call pre-tracking action of derived class
+  PreTrackingAction(track);
+
+  // let sensitive detector process vertex step
+  // (this ensures compatibility with G3 that
+  // makes first step of zero length)
+   
+  TG4StepManager* stepManager = TG4StepManager::Instance();
+  stepManager->SetStep((G4Track*)track, kVertex);
+  
+  G4VPhysicalVolume* pv = stepManager->GetCurrentPhysicalVolume();
+  
+  if (!pv) {
+    G4String text = "TG4TrackingAction::PreUserTrackingAction: \n";
+    text = text + "   Cannot locate track vertex."; 
+    TG4Globals::Exception(text);
+  }  
+  
+  G4VSensitiveDetector* sd
+    = pv->GetLogicalVolume()->GetSensitiveDetector();
+
+  if (sd) {
+    TG4VSensitiveDetector* tsd = dynamic_cast<TG4VSensitiveDetector*>(sd);
+    if (tsd) 
+      tsd->UserProcessHits((G4Track*)track, 0);
+    else {
+      G4String text = "TG4TrackingAction::PreUserTrackingAction: \n";
+      text = text + "   Unknown sensitive detector type"; 
+      TG4Globals::Exception(text);
+    }          
+  } 
+}
+
+void TG4TrackingAction::PostUserTrackingAction(const G4Track* track)
+{
+// Called by G4 kernel after finishing tracking.
+// ---
+
+  // call post-tracking action of derived class
+  PostTrackingAction(track);
+}
+