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// This is the modified version of the example electromagnetic/TestEm7/src/StepMax.cc

#include "StepMax.hh"
#include "StepMaxMessenger.hh"

StepMax::StepMax(const G4String& processName)
 : G4VDiscreteProcess(processName),fMaxChargedStep(DBL_MAX),fMess(0)
{
  fMess = new StepMaxMessenger(this);
}

StepMax::~StepMax() { delete fMess; }

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

void StepMax::SetMaxStep(G4double step) {fMaxChargedStep = step;}

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

  if((fMaxChargedStep > 0.) &&
     (aTrack.GetVolume() != NULL) &&
     (aTrack.GetVolume()->GetName() != "World"))
     ProposedStep = fMaxChargedStep;

  return ProposedStep;
}

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