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)
    {
      std::size_t nComponents = GetComponents()->size();
      for (std::size_t 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)
    {
      std::size_t n = components->size();
      for (std::size_t i=0; i<n; ++i)
    {
      G4CrossSectionSourcePtr componentPtr = (*components)[i];
      G4VCrossSectionSource* component = componentPtr();
      if (component->IsValid(e)) 
        {
          answer = true;
          break;
        }
    }
    }
  return answer;
}