TFormFactor.h

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#ifndef RAD_TFormFactor
#define RAD_TFormFactor
 
#include "TRadSpline.h"
#include <complex>
 
class TFormFactor {
protected:
  unsigned int                 fNp;
  TRadSpline*                  fsvsr;
  TRadSpline*                  fsvsi;
  bool                         fUnitFF;
  virtual std::complex<double> ff( const double& ) = 0;
 
public:
  TFormFactor();
  virtual ~TFormFactor();
  void                        SetUnitFF() { fUnitFF = true; }
  void                        SetDefaultFF() { fUnitFF = false; }
  bool                        GetFFMode() { return fUnitFF; }
  void                        SetNpoints( const unsigned int& i ) { fNp = i; }
  void                        Init();
  void                        Init( const double& );
  inline std::complex<double> Eval( const double& s ) {
    if ( fUnitFF ) return std::complex<double>( 1, 0 );
    return std::complex<double>( fsvsr->Eval( s ), fsvsi->Eval( s ) );
  }
  void Print();
};
 
#endif // #ifndef RAD_TFormFactor