G4ParticleHPEnAngCorrelation.hh

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//
// P. Arce, June-2014 Conversion neutron_hp to particle_hp
// V. Ivanchenko, July-2023 Basic revision of particle HP classes
//
#ifndef G4ParticleHPEnAngCorrelation_h
#define G4ParticleHPEnAngCorrelation_h 1
 
#include "G4Cache.hh"
#include "G4ParticleHPManager.hh"
#include "G4ParticleHPProduct.hh"
#include "G4ParticleHPVector.hh"
#include "G4ReactionProduct.hh"
#include "G4ios.hh"
#include "Randomize.hh"
#include "globals.hh"
 
#include <fstream>
 
class G4ParticleDefinition;
 
class G4ParticleHPEnAngCorrelation
{
    struct toBeCached
    {
      G4ReactionProduct* theProjectileRP{nullptr};
      G4ReactionProduct* theTarget{nullptr};
      G4double theTotalMeanEnergy{-1.0};
      toBeCached() = default;
    };
 
  public:
    explicit G4ParticleHPEnAngCorrelation(const G4ParticleDefinition* proj = nullptr);
    ~G4ParticleHPEnAngCorrelation();
 
    void Init(std::istream& aDataFile);
 
    G4ReactionProduct* SampleOne(G4double anEnergy);
 
    G4ReactionProductVector* Sample(G4double anEnergy);
 
    void SetTarget(G4ReactionProduct& aTarget)
    {
      fCache.Get().theTarget = &aTarget;
      for (G4int i = 0; i < nProducts; ++i)
        theProducts[i].SetTarget(&aTarget);
    }
 
    void SetProjectileRP(G4ReactionProduct& aIncidentPart)
    {
      fCache.Get().theProjectileRP = &aIncidentPart;
      for (G4int i = 0; i < nProducts; ++i)
        theProducts[i].SetProjectileRP(&aIncidentPart);
    }
 
    G4bool InCharge() { return inCharge; }
 
    G4double GetTargetMass() { return targetMass; }
 
    G4double GetNumberOfProducts() { return nProducts; }
 
    G4double GetTotalMeanEnergy()
    {
      return fCache.Get().theTotalMeanEnergy;  // cached in 'sample' call
    }
 
    G4ParticleHPEnAngCorrelation(G4ParticleHPEnAngCorrelation&) = delete;
    G4ParticleHPEnAngCorrelation& operator=
    (const G4ParticleHPEnAngCorrelation &right) = delete;
 
  private:
    const G4ParticleDefinition* theProjectile;
    G4ParticleHPProduct* theProducts{nullptr};
 
    G4double targetMass{0.0};
 
    G4int frameFlag{1};  // =1: Target rest frame; =2: CMS system; incident in lab
    G4int nProducts{0};
    G4bool inCharge{false};
 
    // cached values
    //
    G4Cache<toBeCached> fCache;
};
 
#endif