// This code implementation is the intellectual property of
// the 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: G4Step.icc,v 1.3 2000/10/18 15:00:09 kurasige Exp $
// GEANT4 tag $Name: geant4-03-00 $
//
//
//---------------------------------------------------------------
//
//-----------------------------------------------------------------
//  In-line definitions
//-----------------------------------------------------------------

// Get/Set functions 
inline 
 G4StepPoint* G4Step::GetPreStepPoint() const 
 { 
   return fpPreStepPoint; 
 }

inline 
 void G4Step::SetPreStepPoint(G4StepPoint* value)
 { 
   fpPreStepPoint = value; 
 }

inline 
 G4StepPoint* G4Step::GetPostStepPoint() const
 { 
   return fpPostStepPoint; 
 }
   
inline 
 void G4Step::SetPostStepPoint(G4StepPoint* value)
 { 
   fpPostStepPoint = value; 
 }

inline 
 G4double G4Step::GetStepLength() const
 { 
   return fStepLength; 
 }

inline 
 void G4Step::SetStepLength(G4double value)
 { 
   fStepLength = value; 
 }

inline 
 G4ThreeVector G4Step::GetDeltaPosition() const
 { 
   return fpPostStepPoint->GetPosition()
            - fpPreStepPoint->GetPosition(); 
 }

inline 
 G4double G4Step::GetDeltaTime() const
 { 
   return fpPostStepPoint->GetLocalTime()
            - fpPreStepPoint->GetLocalTime(); 
 }

inline 
 G4ThreeVector G4Step::GetDeltaMomentum() const
 { 
   return fpPostStepPoint->GetMomentum()
            - fpPreStepPoint->GetMomentum(); 
 }

inline 
 G4double G4Step::GetDeltaEnergy() const
 { 
   return fpPostStepPoint->GetKineticEnergy()
            - fpPreStepPoint->GetKineticEnergy(); 
 }

inline 
 G4double G4Step::GetTotalEnergyDeposit() const
 { 
   return fTotalEnergyDeposit; 
 }

inline 
 void G4Step::SetTotalEnergyDeposit(G4double value)
 { 
   fTotalEnergyDeposit = value;   
 }

inline 
 void G4Step::AddTotalEnergyDeposit(G4double value)
 { 
   fTotalEnergyDeposit += value;   
 }

inline 
 void G4Step::ResetTotalEnergyDeposit()
 { 
   fTotalEnergyDeposit = 0.; 
 }

inline 
 void G4Step::SetControlFlag(G4SteppingControl value)
 {
   fpSteppingControlFlag = value;     
 }

inline 
 G4SteppingControl G4Step::GetControlFlag() const
 {
   return fpSteppingControlFlag;     
 }

inline 
 void G4Step::CopyPostToPreStepPoint( )
 { 
   *(fpPreStepPoint) = *(fpPostStepPoint);
 }


//-------------------------------------------------------------
// To implement bi-directional association between G4Step and
// and G4Track, a combined usage of 'forward declaration' and
// 'include' is necessary.
//-------------------------------------------------------------
#include "G4Track.hh"

inline 
 G4Track* G4Step::GetTrack() const
 { 
   return fpTrack; 
 }
   
inline 
 void G4Step::SetTrack(G4Track* value)
 { 
   fpTrack = value; 
 }


// Other member functions
inline 
 void G4Step::InitializeStep( G4Track* aValue )
 {
   // Initialize G4Step attributes
   fStepLength = 0.;
   fTotalEnergyDeposit = 0.;
   fpTrack = aValue;
   fpTrack->SetStepLength(0.);
   
   // Initialize G4StepPoint attributes.
   // To avoid the circular dependency between G4Track, G4Step
   // and G4StepPoint, G4Step has to manage the copy actions.
   fpPreStepPoint->SetPosition(fpTrack->GetPosition());
   fpPreStepPoint->SetGlobalTime(fpTrack->GetGlobalTime());
   fpPreStepPoint->SetLocalTime(fpTrack->GetLocalTime());
   fpPreStepPoint->SetProperTime(fpTrack->GetProperTime());
   fpPreStepPoint->SetMomentumDirection(fpTrack->GetMomentumDirection());
   fpPreStepPoint->SetKineticEnergy(fpTrack->GetKineticEnergy());
   fpPreStepPoint->SetTouchable(fpTrack->GetTouchable());
   fpPreStepPoint->SetMaterial( fpTrack->GetTouchable()->GetVolume()->GetLogicalVolume()->GetMaterial());
   fpPreStepPoint->SetPolarization(fpTrack->GetPolarization());
   fpPreStepPoint->SetSafety(0.);
   fpPreStepPoint->SetStepStatus(fUndefined);
   fpPreStepPoint->SetProcessDefinedStep(0);
   fpPreStepPoint->SetMass(fpTrack->GetDynamicParticle()->GetMass());    
   fpPreStepPoint->SetWeight(fpTrack->GetWeight());
   
   
   (*fpPostStepPoint) = (*fpPreStepPoint);
 }

inline 
 void G4Step::UpdateTrack( )
 { 
   // To avoid the circular dependency between G4Track, G4Step
   // and G4StepPoint, G4Step has to manage the update actions.
   //  position, time
   fpTrack->SetPosition(fpPostStepPoint->GetPosition());
   fpTrack->SetGlobalTime(fpPostStepPoint->GetGlobalTime());
   fpTrack->SetLocalTime(fpPostStepPoint->GetLocalTime());
   fpTrack->SetProperTime(fpPostStepPoint->GetProperTime());
   //  energy, momentum, polarization
   fpTrack->SetMomentumDirection(fpPostStepPoint->GetMomentumDirection());
   fpTrack->SetKineticEnergy(fpPostStepPoint->GetKineticEnergy());
   fpTrack->SetPolarization(fpPostStepPoint->GetPolarization());
   //  mass charge
   G4DynamicParticle* pParticle = (G4DynamicParticle*)(fpTrack->GetDynamicParticle());
   pParticle->SetMass(fpPostStepPoint->GetMass());
   pParticle->SetCharge(fpPostStepPoint->GetCharge());
   //  step length
   fpTrack->SetStepLength(fStepLength);
   // NextTouchable is updated 
   // (G4Track::Touchable points touchable of Pre-StepPoint)
   fpTrack->SetNextTouchable(fpPostStepPoint->GetTouchable());
   fpTrack->SetWeight(fpPostStepPoint->GetWeight());
 }