---

GRBShell.h

#include "GRBConstants.h"

#ifndef GRBSHELL_H
#define GRBSHELL_H 1

class GRBShell 
{  
 public:

  GRBShell(double gamma, double mass,
           double thickness, double radius,double distance = 0.0,std::string type = "jet");
  
  ~GRBShell() { }
  GRBShell operator+(GRBShell Sh2);
  // Accessors to data member values:
  inline double getMass()      {return m_mass;}

  inline double getGamma()     {return m_gamma;}

  inline double getThickness() {return m_thickness;}

  inline double getRadius()    {return m_radius;}  

  inline double getDistance()    {return m_distance;} 

  inline double getBeta()      {return beta(m_gamma);}

  inline double getEint()      {return m_eint;}
  inline double getVolCom()    
    {
      return m_volume;
    }
  
  //Set functions: Should be more protected!!

  inline void setMass(double value)      {m_mass = value;}

  inline void setGamma(double value)     {m_gamma = value;}

  inline void setThickness(double value) {m_thickness = value;}

  inline void setRadius(double value)    {m_radius = value;}

  inline void setDistance(double value)  {m_distance = value;}

  inline void setEint(double value)      {m_eint = value;}
  
  //Higher  level functions:

  double    beta(const double gamma);

  void      evolve(double time);
    
 private:
  //Data Members:
  double m_gamma;
  double m_mass;
  double m_thickness;
  double m_radius;
  double m_distance;
  double m_volume;
  double m_eint;
};

#endif

---