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//
// -------------------------------------------------------------------
//
// GEANT4 Class header file
//
//
// File name:  G4SauterGavrilaAngularDistribution
//
// Author:     Vladimir Ivanchenko using Michel Maire algorithm
//             developed for Geant3
// 
// Creation date: 23 July 2012
//
// Class Description: 
//
// Photoelectric Angular Distribution Generation 
// The Sauter-Gavrila distribution for the K-shell is used.
//
// -------------------------------------------------------------------
//

#ifndef G4SauterGavrilaAngularDistribution_h
#define G4SauterGavrilaAngularDistribution_h 1

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

class G4SauterGavrilaAngularDistribution : public G4VEmAngularDistribution
{

public:

  explicit G4SauterGavrilaAngularDistribution();

  virtual ~G4SauterGavrilaAngularDistribution();

  virtual G4ThreeVector& SampleDirection(const G4DynamicParticle* dp,
                                         G4double e = 0.0,
                                         G4int shellId = 0,
                                         const G4Material* mat = 0) final;

  virtual void PrintGeneratorInformation() const final;

private:

  // hide assignment operator 
  G4SauterGavrilaAngularDistribution & operator=
  (const  G4SauterGavrilaAngularDistribution &right) = delete;
  G4SauterGavrilaAngularDistribution(const  G4SauterGavrilaAngularDistribution&) = delete;

};

#endif

