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// $Id: G4MuBremsstrahlung.icc,v 1.4.2.2 2001/06/28 20:19:44 gunter Exp $
// GEANT4 tag $Name:  $
//
// ---------------------------------------------------------------
//      GEANT 4 class inlined methods file 
//
//      History: first implementation, based on object model of
//      2nd December 1995, G.Cosmo
//      -------- G4MuBremsstrahlung physics process ---------
//                by Laszlo Urban, September 1997
// ***************************************************************
//
// Modified:
//
// 29.05.01 V.Ivanchenko minor changes to provide ANSI -wall compilation 
//
// ---------------------------------------------------------------
//

inline G4double G4MuBremsstrahlung::GetMeanFreePath(const G4Track& trackData,
                                                    G4double previousStepSize,
                                                    G4ForceCondition* condition)
{
   const G4DynamicParticle* aDynamicParticle;
   G4Material* aMaterial;
   G4double MeanFreePath;
   G4bool isOutRange ;
 
   *condition = NotForced ;

   aDynamicParticle = trackData.GetDynamicParticle();
   aMaterial = trackData.GetMaterial();
   G4double KineticEnergy = aDynamicParticle->GetKineticEnergy();

   if (KineticEnergy <  LowestKineticEnergy)
     MeanFreePath = DBL_MAX ;
   else {
     if (KineticEnergy > HighestKineticEnergy) 
                                KineticEnergy = 0.99*HighestKineticEnergy ;
     MeanFreePath = (*theMeanFreePathTable)(aMaterial->GetIndex())->
                                      GetValue( KineticEnergy, isOutRange );
   }
   return MeanFreePath; 
} 


inline G4double G4MuBremsstrahlung::ComputeMeanFreePath(
                                     const G4ParticleDefinition* ParticleType,
                                           G4double KineticEnergy,
                                           const G4Material* aMaterial)
{
  const G4ElementVector* theElementVector = aMaterial->GetElementVector() ;
  const G4double* theAtomNumDensityVector = 
                                     aMaterial->GetAtomicNumDensityVector();
  G4double GammaEnergyCut = (G4Gamma::GetCutsInEnergy())[aMaterial->GetIndex()];   
  G4double SIGMA = 0 ;
  for ( size_t i=0 ; i < aMaterial->GetNumberOfElements() ; i++ )
      {             
            SIGMA += theAtomNumDensityVector[i] * 
                     ComputeMicroscopicCrossSection(
                                            ParticleType, KineticEnergy,
                                            (*theElementVector)(i)->GetZ(), 
                                            (*theElementVector)(i)->GetA(), 
                                                     GammaEnergyCut );
      }       

  return SIGMA<=0.0 ? DBL_MAX : 1./SIGMA ;
}


inline G4bool G4MuBremsstrahlung::IsApplicable(
                            const G4ParticleDefinition& particle)
{
   return(   (&particle == (const G4ParticleDefinition *)theMuonMinus)
           ||(&particle == (const G4ParticleDefinition *)theMuonPlus)
         ) ;
}