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// $Id: G4EmMultiModel.hh,v 1.7 2010/07/04 17:51:09 vnivanch Exp $
// GEANT4 tag $Name: emutils-V09-03-23 $
//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:     G4EmMultiModel
//
// Author:        Vladimir Ivanchenko
//
// Creation date: 03.05.2004
//
// Modifications:
// 15-04-05 optimize internal interface (V.Ivanchenko)
// 04-07-10 updated interfaces according to g4 9.4 (V.Ivanchenko)
//
// Class Description:
//
// EM model using several G4VEmModels for the same energy interval

// -------------------------------------------------------------------
//

#ifndef G4EmMultiModel_h
#define G4EmMultiModel_h 1

#include "globals.hh"
#include "G4VEmModel.hh"
#include <vector>

class G4DynamicParticle;

class G4EmMultiModel :  public G4VEmModel
{

public:

  G4EmMultiModel(const G4String& nam = "MultiModel");

  virtual ~G4EmMultiModel();

  void AddModel(G4VEmModel*);

  virtual void Initialise(const G4ParticleDefinition*, 
			  const G4DataVector&);

  virtual G4double ComputeDEDX(const G4MaterialCutsCouple*,
			       const G4ParticleDefinition*,
			       G4double kineticEnergy,
			       G4double cutEnergy);

  // main method to compute cross section per atom
  virtual 
  G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition*,
				      G4double kinEnergy,
				      G4double Z,
				      G4double A = 0., /* amu */
				      G4double cutEnergy = 0.0,
				      G4double maxEnergy = DBL_MAX);

  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
				 const G4MaterialCutsCouple*,
				 const G4DynamicParticle*,
				 G4double tmin,
				 G4double tmax);

private: 

  //  hide assignment operator
  G4EmMultiModel & operator=(const  G4EmMultiModel &right);
  G4EmMultiModel(const  G4EmMultiModel&);

  G4int                         nModels;
  std::vector<G4VEmModel*>      model;
  std::vector<G4double>         cross_section;

};

#endif