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EGS.h

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// -*- C++ -*-  $Id: EGS.h,v 1.1 2000/09/01 20:20:13 burnett Exp $
//
// This file is part of Gismo 2


// Contents ----------------------------------------------------------------
//
//      EGS
//
// Description
//
//      class EGS encapsulates the particle list and interactions
//
// End --------------------------------------------------------------------

#ifndef __EGS_H
#define __EGS_H

#ifdef _MSC_VER
# pragma warning(disable:4305) //truncation from 'const double' to 'float'
#endif

class PEGSData;
#include <iostream>

class EGS   // corresponds to the EGS4 particle stack
{
public:
    int   iq;    // charge (-1,0,1) for (electron, photon, positron)
    float e;     // energy in MeV
    float u,v,w; // direction unit vector
    float x,y,z; // position in dunit units
    EGS*  prev;  // back link
    EGS*  next;  // foward link
    
    EGS(EGS* tos=0);    // constructor
    virtual ~EGS();     // destructor
    
    void interact(const PEGSData&);         // interact in the material
    void mscat(float,const  PEGSData&);      // apply multiple scattering
    
    void printOn(std::ostream&);
    
public:
    // these member functions used by interact and mscats

    // rotate by angles
    void rotate(double costhe, double phi);
    void rotate(double costhe, double phi, double sinthe); // this form when sinth known, and small

    
    virtual void  brems(const PEGSData&);
    virtual void  pairProd(const PEGSData&);
    virtual void  annih();
    virtual void  moller(const PEGSData&);
    virtual void  compt();
    virtual void  bhabha(const PEGSData&);
    virtual void  photo(const PEGSData&);
    virtual void  rayleigh(const PEGSData &m );
    
    
    // static data used by above routines
    
public:
    static double rm;           // electron mass in MeV
    static double rm2;      // accuarately
    static double rmsq;       // square of electron mass
    
};
#endif

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