// 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.
//
//
// 
// ---------------------------------------------------------------
//      GEANT 4 class inlined methods file 
//
//      For information related to this code contact:
//      CERN, IT Division, ASD group
//      ------------ G4PAIonisation physics process ------------
//                  by Laszlo Urban, 30 May 1997
// ***************************************************************
// It is the first implementation of the NEW IONISATION PROCESS.               
// It calculates the ionisation of charged hadrons.
// ***************************************************************
// corrected by L.Urban on 24/09/97
// 06.01.00 V.Grichine, modifications in GetConstraints and GetMenaFreePath
//
//


////////////////////////////////////////////////////////////////////
//
//

inline G4double
 G4PAIonisation::GetConstraints(const G4DynamicParticle *aParticle,
                                              G4Material *aMaterial    ) 
{  
  G4int index = aMaterial->GetIndex() ;

//  G4cout<<"G4PAIonisation::GetConstraints is called"<<G4endl ;

  if(index != fMatIndex)
  {
    return DBL_MAX ;
  } 
  else
  {
    if(aMaterial->GetState() == kStateGas) 
    {
      return 100*mm ;
    }
    else
    {
      return 0.1*mm ;
    }
  }
}



//////////////////////////////////////////////////////////////////////////
//
//

inline G4double 
G4PAIonisation::GetContinuousStepLimit( const G4Track& track ,
                                              G4double ,
                                              G4double currentMinimumStep ,
                                              G4double&                     )
{
 
  G4double Step =
    GetConstraints(track.GetDynamicParticle(),track.GetMaterial()) ;

  if( (Step > 0.0) && (Step < currentMinimumStep) ) currentMinimumStep = Step ;

  return Step ;
}



/////////////////////////////////////////////////////////////////////////
//
//

inline G4double G4PAIonisation::GetMeanFreePath(
                                               const G4Track& trackData,
                                               G4double previousStepSize,
                                               G4ForceCondition* condition) 
{
//   G4cout<<"G4PAIonisation::GetMeanFreePath is called"<<G4endl ;
 
   *condition = NotForced ;
   
   G4Material* aMaterial = trackData.GetMaterial() ;

   if( aMaterial->GetIndex() != fMatIndex ) 
   {
     return DBL_MAX;
   }
   else 
   {
     return DBL_MAX ; // 1*mm ;
   }
}

//////////////////////////////////////////////////////////////////////
//
//

inline G4bool G4PAIonisation::IsApplicable(
                            const G4ParticleDefinition& particle)
{
   return(particle.GetPDGCharge() != 0.);
}

//////////////////////////////////////////////////////////////////////////
//
//         

inline
G4double G4PAIonisation::GetSandiaPhotoAbsCof(G4int i, G4int j) const 
{
   if(i < 0 || i >= fSandiaIntervalNumber || j < 0 || j > 4)
   {
      G4Exception("Invalid arguments in G4Material::GetSandiaPhotoAbsCof") ;
   }
   return fSandiaPhotoAbsCof[i][j] ;
}


//
//
/////////////////////////////////////////////////////////////////////////