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//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:  G4DeltaAngle
//
// Author:     Vladimir Ivantchenko
// 
// Creation date: 23 August 2013
//
// Modifications: 
//
// Class Description: 
//
// Delta-electron Angular Distribution Generation 
//
// -------------------------------------------------------------------
//

#ifndef G4DeltaAngle_h
#define G4DeltaAngle_h 1

#include "G4ios.hh"
#include "globals.hh"
#include "G4VEmAngularDistribution.hh"

class G4ParticleDefinition;

class G4DeltaAngle : public G4VEmAngularDistribution
{

public:

  explicit G4DeltaAngle(const G4String& name = "");

  virtual ~G4DeltaAngle();

  virtual G4ThreeVector& SampleDirection(const G4DynamicParticle* dp,
                                         G4double kinEnergyFinal, G4int Z,
                                         const G4Material* mat = nullptr) final;

  virtual G4ThreeVector& SampleDirectionForShell(
                                         const G4DynamicParticle* dp,
                                         G4double kinEnergyFinal,
                                         G4int Z, G4int shellIdx,
                                         const G4Material* mat = nullptr) final;

  virtual void PrintGeneratorInformation() const final;

private:

  // hide assignment operator 
  G4DeltaAngle & operator=(const  G4DeltaAngle &right) = delete;
  G4DeltaAngle(const  G4DeltaAngle&) = delete;

  const G4ParticleDefinition* fElectron;
  std::vector<G4double> prob;
  G4int                 nprob;
  G4int                 fShellIdx;
};

#endif

