EvtAmpPdf.hh

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/*******************************************************************************
 * Project: BaBar detector at the SLAC PEP-II B-factory
 * Package: EvtGenBase
 *    File: $Id: EvtAmpPdf.hh,v 1.1.1.2 2007/10/26 05:03:14 pingrg Exp $
 *  Author: Alexei Dvoretskii, dvoretsk@slac.stanford.edu, 2001-2002
 *
 * Copyright (C) 2002 Caltech
 *******************************************************************************/
 
#ifndef EVT_AMP_PDF_HH
#define EVT_AMP_PDF_HH
 
#include "EvtAmplitude.hh"
#include "EvtMacros.hh"
#include "EvtPdf.hh"
 
template <class T>
 
class EvtAmpPdf : public EvtPdf<T> {
public:
  EvtAmpPdf() {}
  EvtAmpPdf( const EvtAmplitude<T>& amp ) : EvtPdf<T>(), _amp( amp.clone() ) {}
  EvtAmpPdf( const EvtAmpPdf<T>& other ) : EvtPdf<T>( other ), COPY_PTR( _amp ) {}
  virtual ~EvtAmpPdf() { delete _amp; }
 
  virtual EvtAmpPdf<T>* clone() const { return new EvtAmpPdf( *this ); }
 
  virtual double pdf( const T& p ) const {
    EvtComplex amp = _amp->evaluate( p );
    return real( amp ) * real( amp ) + imag( amp ) * imag( amp );
  }
 
private:
  EvtAmplitude<T>* _amp;
};
 
#endif