source: JEM-EUSO/esaf_cc_at_lal/packages/simulation/radiativetransfer/include/AlongTrack_CSPropagator.hh @ 114

// $Id: AlongTrack_CSPropagator.hh 1807 2005-05-02 17:21:53Z moreggia $
// Author: Sylvain Moreggia   2004/09/29

/*****************************************************************************
 * ESAF: Euso Simulation and Analysis Framework                              *
 *                                                                           *
 *  Id: AlongTrack_CSPropagator                                              *
 *  Package: RadiativeTransfer                                               *
 *  Coordinator: Sylvain Moreggia                                            *
 *                                                                           *
 *****************************************************************************/

#ifndef __ALONGTRACK_CSPROPAGATOR_HH__
#define __ALONGTRACK_CSPROPAGATOR_HH__

#include "euso.hh"
#include "O2_ClearSkyPropagator.hh"


////////////////////////////////////////////////////////////////////////////////
//                                                                            //
// AlongTrack_CSPropagator                                                    //
//                                                                            //  
// same as O2_ClearSkyPropagator, but considers that all the bunches have the //
// same direction, which is track direction                                   //
//                                                                            //  
// MUST BE CALLED if light created ALONG A TRACK, otherwise it fails          //
// FIRST BUNCH propagated MUST BE at the track origin, otherwise it fails too //
//                                                                            //  
// Cerenkov backscattering is thus simulated, and lowtran tables calculated   //
// only once along the shower track                                           //  
//                                                                            //  
////////////////////////////////////////////////////////////////////////////////

class AlongTrack_CSPropagator : public O2_ClearSkyPropagator {
public:
    // ctor (should not be used)
    AlongTrack_CSPropagator();
    
    // ctor, copy RadiatvieTransfer ground description
    AlongTrack_CSPropagator(const Ground*);
    
    // dtor
    virtual ~AlongTrack_CSPropagator();
    
    // Transport a BunchOfPhotons in clear sky conditions
    // generates SinglePhotons all along the travel (filling ListPhotonsInAtmosphere)
    virtual Medium Go(BunchOfPhotons&,ListPhotonsInAtmosphere&) const;
    
    // get ready for next event
    virtual void Reset();
    
private:
    // Called for the first treated bunch, set fFlag and fImpact, Call RadiativeProcessesCalculator::PreProcess()
    void PreProcess(const BunchOfPhotons&) const;
   
    // Propagate the bunch
    void Propagate(BunchOfPhotons&,ListPhotonsInAtmosphere&) const;
    
    // Check if bunches are along a track, with first at the track beginning
    Bool_t IsAlongTrack(const BunchOfPhotons&) const;

    mutable Bool_t fFlag;                      // flag to know if preprocess has been run
    mutable Medium fFinal_medium;              // medium where final impact occurs
    mutable BunchOfPhotons* fFirstBunch;       // copy the first bunch to run IsAlongTrack() method
                                               // contains the calculated FinalImpact

    ClassDef(AlongTrack_CSPropagator,0)
};

#endif  /* __ALONGTRACK_CSPROPAGATOR_HH__ */