next_event_dummy.cpp

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//==========================================================================
//  AIDA Detector description implementation 
//--------------------------------------------------------------------------
// Copyright (C) Organisation europeenne pour la Recherche nucleaire (CERN)
// All rights reserved.
//
// For the licensing terms see $DD4hepINSTALL/LICENSE.
// For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
//
//==========================================================================
 
#include "TEveManager.h"
#include <iostream>
#include "TEveStraightLineSet.h"
#include "TRandom.h"
 
TEveStraightLineSet* lineset(Int_t nlines = 40, Int_t nmarkers = 4) ;
 
void next_event(){
 
  // static int count = 1 ;
 
  std::cout <<  " next_event called - nothing to do ... " << std::endl ;
 
  TEveElementList* tevent = (TEveElementList* ) gEve->GetCurrentEvent() ;
  
  if( tevent ) 
    tevent->DestroyElements() ;
  
  
  //  lineset( count, count ) ;
  
  gEve->Redraw3D();
  
  // count += 3 ;
}
 
 
//=====================================================================================
TEveStraightLineSet* lineset(Int_t nlines, Int_t nmarkers )
{
  TEveManager::Create();
 
  TRandom r(0);
  Float_t s = 100;
 
  TEveStraightLineSet* ls = new TEveStraightLineSet();
 
  for(Int_t i = 0; i<nlines; i++)
  {
    ls->AddLine( r.Uniform(-s,s), r.Uniform(-s,s), r.Uniform(-s,s),
                 r.Uniform(-s,s), r.Uniform(-s,s), r.Uniform(-s,s));
    // add random number of markers
    Int_t nm = Int_t(nmarkers* r.Rndm());
    for(Int_t m = 0; m < nm; m++) {
      ls->AddMarker(i, r.Rndm());
    }
  }
 
  ls->SetMarkerSize(1.5);
  ls->SetMarkerStyle(4);
 
  gEve->AddElement(ls);
  gEve->Redraw3D();
 
  return ls;
}
//=====================================================================================