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//
// -------------------------------------------------------------------
//      GEANT4 Class file
//
//
//      File name:     G4Clebsch
//
//      Author:        Maria Grazia Pia (MariaGrazia.Pia@genova.infn.it)
// 
//      Creation date: 15 April 1999
//
//      Modifications: 
//      
//      Kinetic Model, Clebsch-Gordan coefficient and related algebra
//
// -------------------------------------------------------------------

#ifndef G4CLEBSCH_HH
#define G4CLEBSCH_HH

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

class G4Clebsch 
{

public:

  G4Clebsch();

  virtual ~G4Clebsch();

  G4bool operator==(const G4Clebsch &right) const;
  G4bool operator!=(const G4Clebsch &right) const;

  G4double ClebschGordan(G4int isoIn1, G4int iso3In1, 
			 G4int isoIn2, G4int iso3In2, 
			 G4int jOut) const;

  std::vector<G4double> GenerateIso3(G4int isoIn1, G4int iso3In1, 
				       G4int isoIn2, G4int iso3In2, 
				       G4int isoOut1,G4int isoOut2) const;

  G4double Weight(G4int isoIn1,  G4int iso3In1, 
		  G4int isoIn2,  G4int iso3In2, 
		  G4int isoOut1, G4int isoOut2) const;
  
  G4double Wigner3J(G4double j1, G4double j2, G4double j3, 
		    G4double m1, G4double m2, G4double m3) const;
  
  const std::vector<G4double>& GetLogs() const;
  
  // Calculates the normalized Clebsch-Gordan coefficient, that is the prob 
  // of isospin decomposition of (J,m) into J1, J2, m1, m2
  G4double NormalizedClebschGordan(G4int J, G4int m, 
				   G4int J1, G4int J2,
				   G4int m1, G4int m2) const;
  
protected:

private:  

  G4Clebsch(const G4Clebsch &right);
  G4Clebsch& operator=(const G4Clebsch &right);  

  std::vector<G4double> logs;

};

#endif