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// $Id: G4CascadParticle.hh,v 1.16 2010/09/16 05:21:00 mkelsey Exp $
// Geant4 tag: $Name: geant4-09-04 $
//
// 20100112  M. Kelsey -- Remove G4CascadeMomentum, use G4LorentzVector directly
// 20100126  M. Kelsey -- Replace vector<G4Double> position with G4ThreeVector,
//		move ::print() to .cc file, fix uninitialized data members
// 20100915  M. Kelsey -- Make getGeneration() const

#ifndef G4CASCAD_PARTICLE_HH
#define G4CASCAD_PARTICLE_HH

#include "G4InuclElementaryParticle.hh"
#include "G4LorentzVector.hh"
#include "G4ThreeVector.hh"


class G4CascadParticle {

public:
  // NOTE:  Default constructor does not make a functional object!
  G4CascadParticle();

  G4CascadParticle(const G4InuclElementaryParticle& particle, 
		   const G4ThreeVector& pos,
		   G4int izone, 
		   G4double cpath,
                   G4int gen) 
    : verboseLevel(0), theParticle(particle), position(pos), 
      current_zone(izone), current_path(cpath), movingIn(true),
      reflectionCounter(0), reflected(false), generation(gen) {}

  void updateParticleMomentum(const G4LorentzVector& mom) {
    theParticle.setMomentum(mom);
  }

  void updatePosition(const G4ThreeVector& pos) {
    position = pos;
  }

  void incrementReflectionCounter() {
    reflectionCounter++; 
    reflected = true; 
  }

  void resetReflection() { 
    reflected = false; 
  }

  void incrementCurrentPath(G4double npath) { 
    current_path += npath; 
  }

  void updateZone(G4int izone) {
    current_zone = izone; 
  }

  G4bool movingInsideNuclei() const { 
    return movingIn; 
  }

  G4double getPathToTheNextZone(G4double rz_in, 
				G4double rz_out);

  G4LorentzVector getMomentum() const {		// Can't return ref; temporary
    return theParticle.getMomentum(); 
  }

  const G4InuclElementaryParticle& getParticle() const { 
    return theParticle; 
  }

  G4InuclElementaryParticle& getParticle() {
    return theParticle;
  }

  const G4ThreeVector& getPosition() const { 
    return position; 
  }

  G4int getCurrentZone() const { 
    return current_zone; 
  }

  G4int getNumberOfReflections() const { 
    return reflectionCounter; 
  }

  G4bool young(G4double young_path_cut, 
	       G4double cpath) const { 
    return ((current_path < 1000.) && (cpath < young_path_cut));
  }

  G4bool reflectedNow() const { 
    return reflected; 
  }

  void propagateAlongThePath(G4double path); 

  void print() const;

  G4int getGeneration() const {
    return generation;
  }
   
private: 
  G4int verboseLevel;
  G4InuclElementaryParticle theParticle;
  G4ThreeVector position;
  G4int current_zone;
  G4double current_path;
  G4bool movingIn;
  G4int reflectionCounter;   
  G4bool reflected;
  G4int generation;
};        

#endif // G4CASCAD_PARTICLE_HH