Import Geant4 0.0.0 source tree

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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: ExN05PionShowerModel.cc,v 2.1 1998/12/10 04:05:54 verderi Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+#include "ExN05PionShowerModel.hh"
+#include "ExN05EnergySpot.hh"
+
+#include "Randomize.hh"
+
+#include "G4PionMinus.hh"
+#include "G4PionPlus.hh"
+#include "G4TransportationManager.hh"
+#include "G4VSensitiveDetector.hh"
+#include "G4VTouchable.hh"
+
+#include "G4Colour.hh"
+
+ExN05PionShowerModel::ExN05PionShowerModel(G4String modelName, G4LogicalVolume* envelope)
+: G4VFastSimulationModel(modelName, envelope)
+{
+  fFakeStep          = new G4Step();
+  fFakePreStepPoint  = fFakeStep->GetPreStepPoint();
+  fFakePostStepPoint = fFakeStep->GetPostStepPoint();
+  fpTouchable = new G4TouchableHistory();
+  fpNavigator = new G4Navigator();
+  fNaviSetup  = false;
+}
+
+ExN05PionShowerModel::ExN05PionShowerModel(G4String modelName)
+: G4VFastSimulationModel(modelName)
+{
+  fFakeStep          = new G4Step();
+  fFakePreStepPoint  = fFakeStep->GetPreStepPoint();
+  fFakePostStepPoint = fFakeStep->GetPostStepPoint();
+  fpTouchable = new G4TouchableHistory();
+  fpNavigator = new G4Navigator();
+  fNaviSetup  = false;
+}
+
+ExN05PionShowerModel::~ExN05PionShowerModel()
+{
+  delete fFakeStep;
+  delete fpTouchable;
+  delete fpNavigator;
+}
+
+G4bool ExN05PionShowerModel::IsApplicable(const G4ParticleDefinition& particleType)
+{
+  return 
+    &particleType == G4PionMinus::PionMinusDefinition() ||
+    &particleType == G4PionPlus::PionPlusDefinition();
+}
+
+G4bool ExN05PionShowerModel::ModelTrigger(const G4FastTrack& fastTrack)
+{
+  // Applies the parameterisation always: ie as soon as the pion enters the envelope
+  return true;
+}
+
+void ExN05PionShowerModel::DoIt(const G4FastTrack& fastTrack, 
+		     G4FastStep& fastStep)
+{
+  // Kill the parawmeterised particle:
+  fastStep.KillPrimaryTrack();
+  fastStep.SetPrimaryTrackPathLength(0.0);
+  fastStep.SetTotalEnergyDeposited(fastTrack.GetPrimaryTrack()->GetKineticEnergy());
+
+  // split into "energy spots" energy according to the shower shape:
+  Explode(fastTrack);
+  
+  // and put those energy spots into the crystals:
+  BuildDetectorResponse();
+  
+}
+
+void ExN05PionShowerModel::Explode(const G4FastTrack& fastTrack)
+{
+  //-----------------------------------------------------
+  // Non-physical shower generated: exp along z and
+  // transverse.
+  //-----------------------------------------------------
+
+  // center of the shower, we put at the middle of the ghost:
+  G4ThreeVector showerCenter;
+  G4double distOut;
+  distOut = fastTrack.GetEnvelopeSolid()->
+    DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(),
+		  fastTrack.GetPrimaryTrackLocalDirection());
+  showerCenter = fastTrack.GetPrimaryTrackLocalPosition() + 
+    (distOut/2.)*fastTrack.GetPrimaryTrackLocalDirection();
+
+  showerCenter = fastTrack.GetInverseAffineTransformation()->
+    TransformPoint(showerCenter);
+
+  // axis of the shower, in global reference frame:
+  G4ThreeVector xShower, yShower, zShower;
+  zShower = fastTrack.GetPrimaryTrack()->GetMomentumDirection();
+  xShower = zShower.orthogonal();
+  yShower = zShower.cross(xShower);
+  
+  // shoot the energy spots:
+  G4double Energy = fastTrack.GetPrimaryTrack()->GetKineticEnergy();
+  G4int nSpot = 50;
+  G4double deposit = Energy/double(nSpot);;
+  ExN05EnergySpot eSpot;
+  eSpot.SetEnergy(deposit);
+  G4ThreeVector ePoint;
+
+  G4double z, r, phi;
+  for (int i = 0; i < nSpot; i++)
+    {
+      z   = RandGauss::shoot(0,20*cm);
+      r   = RandGauss::shoot(0,10*cm);
+      phi = RandFlat::shoot()*twopi;
+      ePoint = showerCenter +
+	z*zShower +
+	r*cos(phi)*xShower + r*sin(phi)*yShower;
+      eSpot.SetPosition(ePoint);
+      feSpotList.insert(eSpot);
+    }
+}
+
+
+void ExN05PionShowerModel::BuildDetectorResponse()
+{
+  // Does the assignation of the energy spots to the sensitive volumes:
+  for (int i = 0; i < feSpotList.entries(); i++)
+    {
+      // Draw the energy spot:
+      G4Colour red(1.,0.,0.);
+      feSpotList[i].Draw(&red);
+      //      feSpotList[i].Print();
+      
+      // "converts" the energy spot into the fake
+      // G4Step to pass to sensitive detector:
+      AssignSpotAndCallHit(feSpotList[i]);
+    }
+}
+
+
+void ExN05PionShowerModel::AssignSpotAndCallHit(const ExN05EnergySpot &eSpot)
+{
+  //
+  // "converts" the energy spot into the fake
+  // G4Step to pass to sensitive detector:
+  //
+  FillFakeStep(eSpot);
+
+  //
+  // call sensitive part: taken/adapted from the stepping:
+  // Send G4Step information to Hit/Dig if the volume is sensitive
+  //
+  G4VPhysicalVolume* pCurrentVolume = 
+    fFakeStep->GetPreStepPoint()->GetPhysicalVolume();
+  G4VSensitiveDetector* pSensitive;
+  
+  if( pCurrentVolume != 0 )
+    {
+      pSensitive = pCurrentVolume->GetLogicalVolume()->
+	GetSensitiveDetector();
+      if( pSensitive != 0 )
+	{
+	  pSensitive->Hit(fFakeStep);
+	}
+    }
+}
+
+
+void ExN05PionShowerModel::FillFakeStep(const ExN05EnergySpot &eSpot)
+{
+  //-----------------------------------------------------------
+  // find in which volume the spot is.
+  //-----------------------------------------------------------
+  if (!fNaviSetup)
+    {
+      fpNavigator->
+	SetWorldVolume(G4TransportationManager::GetTransportationManager()->
+		       GetNavigatorForTracking()->GetWorldVolume());
+      fpNavigator->
+	LocateGlobalPointAndUpdateTouchable(eSpot.GetPosition(),
+					    fpTouchable,
+					    false);
+      fNaviSetup = true;
+    }
+  else
+    {
+      fpNavigator->
+	LocateGlobalPointAndUpdateTouchable(eSpot.GetPosition(),
+					    fpTouchable);
+     }
+  //--------------------------------------
+  // Fills attribute of the G4Step needed
+  // by our sensitive detector:
+  //-------------------------------------
+  // set touchable volume at PreStepPoint:
+  fFakePreStepPoint->SetTouchable(fpTouchable);
+  // set total energy deposit:
+  fFakeStep->SetTotalEnergyDeposit(eSpot.GetEnergy());
+}
+
+
+
+
+
+