ML2StepMax.cc

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//
// The code was written by :
//  ^Claudio Andenna  claudio.andenna@ispesl.it, claudio.andenna@iss.infn.it
//      *Barbara Caccia barbara.caccia@iss.it
//      with the support of Pablo Cirrone (LNS, INFN Catania Italy)
//  with the contribute of Alessandro Occhigrossi*
//
// ^INAIL DIPIA - ex ISPESL and INFN Roma, gruppo collegato Sanità, Italy
// *Istituto Superiore di Sanità and INFN Roma, gruppo collegato Sanità, Italy
//  Viale Regina Elena 299, 00161 Roma (Italy)
//  tel (39) 06 49902246
//  fax (39) 06 49387075
//
// more information:
// http://g4advancedexamples.lngs.infn.it/Examples/medical-linac
//
//*******************************************************//

// See more at: http://workgroup.lngs.infn.it/geant4lns/
//
// ----------------------------------------------------------------------------
//                 GEANT 4 - ML2 example
// ----------------------------------------------------------------------------
// Code developed by:
//
// G.A.P. Cirrone(a)*
// 
// (a) Laboratori Nazionali del Sud 
//     of the INFN, Catania, Italy
// 
// * cirrone@lns.infn.it
// ----------------------------------------------------------------------------
#include "ML2StepMax.hh"
#include "ML2StepMaxMessenger.hh"

/////////////////////////////////////////////////////////////////////////////
ML2StepMax::ML2StepMax(const G4String& processName)
 : G4VDiscreteProcess(processName),MaxChargedStep(DBL_MAX)
{
  pMess = new ML2StepMaxMessenger(this);
}
 
/////////////////////////////////////////////////////////////////////////////
ML2StepMax::~ML2StepMax()
{ delete pMess; }

/////////////////////////////////////////////////////////////////////////////
G4bool ML2StepMax::IsApplicable(const G4ParticleDefinition& particle) 
{ 
  return (particle.GetPDGCharge() != 0.);
}

/////////////////////////////////////////////////////////////////////////////    
void ML2StepMax::SetMaxStep(G4double step) {MaxChargedStep = step;}

/////////////////////////////////////////////////////////////////////////////
G4double ML2StepMax::PostStepGetPhysicalInteractionLength(const G4Track& aTrack,
                                                  G4double,
                                                  G4ForceCondition* condition )
{
  // condition is set to "Not Forced"
  *condition = NotForced;
  
  G4double ProposedStep = DBL_MAX;

  if((MaxChargedStep > 0.) &&
     (aTrack.GetVolume() != 0) &&
     (aTrack.GetVolume()->GetName() == "DetectorPhys"))
     ProposedStep = MaxChargedStep;

  return ProposedStep;
}

/////////////////////////////////////////////////////////////////////////////
G4VParticleChange* ML2StepMax::PostStepDoIt(const G4Track& aTrack, const G4Step&)
{
   // do nothing
   aParticleChange.Initialize(aTrack);
   return &aParticleChange;
}