G4CascadeSampler.hh

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// $Id$
//
// 20100506  M. Kelsey -- Move functionality of G4CascadeChannel here,
//      use as base class to G4CascadeFunctions<T>.
// 20100512  M. Kelsey -- Make this templated on energy and multiplicity
//      binning, as base to new sampler.
// 20100803  M. Kelsey -- Add print function for debugging.
// 20110923  M. Kelsey -- Add optional ostream& argument to print()
 
#ifndef G4_CASCADE_SAMPLER_HH
#define G4_CASCADE_SAMPLER_HH
 
#include "globals.hh"
#include "G4CascadeInterpolator.hh"
#include <iosfwd>
#include <vector>
 
template <int NBINS, int NMULT>
class G4CascadeSampler {
public:
  enum { energyBins=NBINS, multBins=NMULT };    // For use in function arguments
 
  G4CascadeSampler(const G4double (&ebins)[energyBins]) 
    : interpolator(ebins), energyScale(ebins) {}
 
  virtual ~G4CascadeSampler() {}
 
  virtual G4double 
  findCrossSection(double ke, const G4double (&xsec)[energyBins]) const;
 
  virtual G4int 
  findMultiplicity(G4double ke, const G4double xmult[][energyBins]) const;
 
  virtual G4int 
  findFinalStateIndex(G4int mult, G4double ke, const G4int index[],
              const G4double xsec[][energyBins]) const;
 
  virtual void print(std::ostream& os) const;
 
private:
  // Optional start/stop arguments default to inclusive arrays
  void fillSigmaBuffer(G4double ke, const G4double x[][energyBins],
               G4int startBin=0, G4int stopBin=multBins) const;
 
  G4int sampleFlat() const;
 
  G4CascadeInterpolator<NBINS> interpolator;
  mutable std::vector<G4double> sigmaBuf;
  const G4double (&energyScale)[energyBins];
};
 
#include "G4CascadeSampler.icc"
 
#endif  /* G4_CASCADE_SAMPLER_HH */