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// $Id: G4AnalyticalEcpssrKCrossSection.hh,v 1.1 2010/06/06 23:40:35 mantero Exp $
// GEANT4 tag $Name: geant4-09-04-ref-00 $

#ifndef G4ANALYTICALECPSSRKCROSSSECTION_HH
#define G4ANALYTICALECPSSRKCROSSSECTION_HH 1

#include "G4VecpssrKModel.hh"
#include "globals.hh"
#include <map>
#include <vector>

#include "G4DNACrossSectionDataSet.hh"


class G4AnalyticalEcpssrKCrossSection : public G4VecpssrKModel
{
public:

  G4AnalyticalEcpssrKCrossSection();

  ~G4AnalyticalEcpssrKCrossSection();
			     
  
  G4double CalculateCrossSection(G4int, G4double, G4double);//according to W.Brandt and G.Lapicki, Phys.Rev.A23(1981)
  
  G4double  ExpIntFunction(G4int n,G4double x);//Exponential Integral Function
  
private:
  
  G4AnalyticalEcpssrKCrossSection(const G4AnalyticalEcpssrKCrossSection&);
  G4AnalyticalEcpssrKCrossSection & operator = (const G4AnalyticalEcpssrKCrossSection &right);

  G4double FunctionFK(G4double k, G4double theta);

  G4double LogLogInterpolate(G4double e1, G4double e2, G4double e, G4double xs1, G4double xs2);
   
  G4double LinLogInterpolate(G4double e1, G4double e2, G4double e, G4double xs1, G4double xs2);
   
  G4double QuadInterpolator(G4double e11, 
 		            G4double e12, 
			    G4double e21, 
			    G4double e22, 
			    G4double x11,
			    G4double x12, 
			    G4double x21, 
			    G4double x22, 
			    G4double t1, 
			    G4double t2, 
			    G4double t, 
			    G4double e);

  typedef std::map<double, std::map<double, double> > TriDimensionMap;

  TriDimensionMap FKData;
  std::vector<double> dummyVec;

  typedef std::map<double, std::vector<double> > VecMap;
  VecMap aVecMap;

  G4int verboseLevel;

  G4DNACrossSectionDataSet* tableC1;
  G4DNACrossSectionDataSet* tableC2;
  G4DNACrossSectionDataSet* tableC3;
};
  
#endif
