G4CrossSectionComposite.cc

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//
// -------------------------------------------------------------------
//      GEANT4 Class file
//
//      For information related to this code contact:
//
//      File name:     G4CrossSectionComposite
//
//      Author:        
// 
//      Creation date: 15 April 1999
//
//      Modifications: 
//      
// -------------------------------------------------------------------

#include "globals.hh"
#include "G4CrossSectionComposite.hh"
#include "G4VCrossSectionSource.hh"
#include "G4KineticTrack.hh"
#include "G4CrossSectionVector.hh"

G4CrossSectionComposite::G4CrossSectionComposite()
{ }


G4CrossSectionComposite::~G4CrossSectionComposite()
{ }


G4bool G4CrossSectionComposite::operator==(const G4CrossSectionComposite &right) const
{
  return (this == (G4CrossSectionComposite*) &right);
}


G4bool G4CrossSectionComposite::operator!=(const G4CrossSectionComposite &right) const
{
  return (this != (G4CrossSectionComposite*) &right);
}


G4double G4CrossSectionComposite::CrossSection(const G4KineticTrack& trk1, 
                                               const G4KineticTrack& trk2) const
{
  // Cross section of composite is the sum of components cross sections

  G4double crossSection = 0.;
  G4double ecm = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();

  const G4CrossSectionVector* components = GetComponents();
  if (components != 0)
    {
      G4int nComponents = this->GetComponents()->size();
//      G4int nValid = 0;
      
      G4int i;
      for (i=0; i<nComponents; i++)
        {
          G4CrossSectionSourcePtr componentPtr = (*components)[i];
          G4VCrossSectionSource* component = componentPtr();
          if (component->IsValid(ecm))
            {
              crossSection += component->CrossSection(trk1,trk2);
            }
        }
    }

  return crossSection;
}


G4bool G4CrossSectionComposite::IsValid(G4double e) const
{
  // The composite is valid if any of its components are valid
  G4bool answer = false;
  const G4CrossSectionVector* components = GetComponents();
  if (components != 0)
    {
      G4int n = components->size();
      G4int i;
      for (i=0; i<n; i++)
        {
          G4CrossSectionSourcePtr componentPtr = (*components)[i];
          G4VCrossSectionSource* component = componentPtr();
          if (component->IsValid(e)) 
            {
              answer = true;
              break;
            }
        }
    }
  return answer;
}

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