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// $Id$
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//


#ifndef G4PrimaryVertex_h
#define G4PrimaryVertex_h 1

#include "globals.hh"
#include "G4Allocator.hh"
#include "G4ThreeVector.hh"
#include "G4PrimaryParticle.hh"
class G4VUserPrimaryVertexInformation;

// class description:
//
//  This is the class which represents a primary vertex. The ofject of this
// class is set to G4Event objct by G4VPrimaryGenerator concrete class.
// This class object has one or more G4PrimaryParticle objects as primary
// particles.

class G4PrimaryVertex 
{
 public:
  inline void *operator new(size_t);
  inline void operator delete(void *aStackedTrack);

 public:  // with description
  G4PrimaryVertex();
  G4PrimaryVertex(G4double x0,G4double y0,G4double z0,G4double t0);
  G4PrimaryVertex(G4ThreeVector xyz0,G4double t0);
  virtual ~G4PrimaryVertex();

 public:
  G4PrimaryVertex(const G4PrimaryVertex &right);
  G4PrimaryVertex & operator=(const G4PrimaryVertex &right);

  G4int operator==(const G4PrimaryVertex &right) const;
  G4int operator!=(const G4PrimaryVertex &right) const;

 public: // with description
  G4ThreeVector GetPosition() const;
  void SetPosition(G4double x0,G4double y0,G4double z0);
  G4double GetX0() const;
  G4double GetY0() const;
  G4double GetZ0() const;
  G4double GetT0() const;
  void SetT0(G4double t0);
  G4int GetNumberOfParticle() const;
  void SetPrimary(G4PrimaryParticle * pp);
  G4PrimaryParticle* GetPrimary(G4int i=0) const;
  void SetNext(G4PrimaryVertex* nv);
  G4PrimaryVertex* GetNext() const;
  G4double GetWeight() const;
  void SetWeight(G4double w);
  void SetUserInformation(G4VUserPrimaryVertexInformation* anInfo);
  G4VUserPrimaryVertexInformation* GetUserInformation() const;

  void Print() const;
  
 private:
  G4double X0;
  G4double Y0;
  G4double Z0;
  G4double T0;
  G4PrimaryParticle * theParticle;
  G4PrimaryParticle * theTail;
  G4PrimaryVertex* nextVertex;
  G4PrimaryVertex* tailVertex;
  G4int numberOfParticle;
  G4double Weight0;
  G4VUserPrimaryVertexInformation* userInfo;

};

#if defined G4PARTICLES_ALLOC_EXPORT
  extern G4DLLEXPORT G4Allocator<G4PrimaryVertex> aPrimaryVertexAllocator;
#else
  extern G4DLLIMPORT G4Allocator<G4PrimaryVertex> aPrimaryVertexAllocator;
#endif

inline void * G4PrimaryVertex::operator new(size_t)
{
  void * aPrimaryVertex;
  aPrimaryVertex = (void *) aPrimaryVertexAllocator.MallocSingle();
  return aPrimaryVertex;
}

inline void G4PrimaryVertex::operator delete(void * aPrimaryVertex)
{
  aPrimaryVertexAllocator.FreeSingle((G4PrimaryVertex *) aPrimaryVertex);
}

inline G4ThreeVector  G4PrimaryVertex::GetPosition() const
{ return G4ThreeVector(X0,Y0,Z0); }

inline void G4PrimaryVertex::SetPosition(G4double x0,G4double y0,G4double z0)
{ X0 = x0; Y0 = y0; Z0 = z0; }

inline G4double G4PrimaryVertex::GetX0() const
{ return X0; }

inline G4double G4PrimaryVertex::GetY0() const
{ return Y0; }

inline G4double G4PrimaryVertex::GetZ0() const
{ return Z0; }

inline G4double G4PrimaryVertex::GetT0() const
{ return T0; }

inline void G4PrimaryVertex::SetT0(G4double t0)
{ T0 = t0; }

inline G4int G4PrimaryVertex::GetNumberOfParticle() const
{ return numberOfParticle; }

inline void G4PrimaryVertex::SetPrimary(G4PrimaryParticle * pp)
{ 
  if(theParticle == 0) { theParticle = pp;     }
  else                 { theTail->SetNext(pp); }
  theTail = pp;
  numberOfParticle++;
}


inline void G4PrimaryVertex::SetNext(G4PrimaryVertex* nv){ 
  if(nextVertex == 0) { nextVertex = nv; }
  else                { tailVertex->SetNext(nv); }
  tailVertex = nv;
}

inline G4PrimaryVertex* G4PrimaryVertex::GetNext() const
{ return nextVertex; }

inline G4double G4PrimaryVertex::GetWeight() const
{ return Weight0; }

inline void G4PrimaryVertex::SetWeight(G4double w)
{ Weight0 = w; }

inline void G4PrimaryVertex::SetUserInformation(G4VUserPrimaryVertexInformation* anInfo)
{ userInfo = anInfo; }

inline G4VUserPrimaryVertexInformation* G4PrimaryVertex::GetUserInformation() const
{ return userInfo; }

#endif