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C0EmEcalBar1.cxx

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// ================================================
// Implementation of C0EmEcalBar1
// ================================================

#include "FastShowerUtils/Samplers/C0EmEcalBar1.h"

#include "FastShowerUtils/ParticleParameters.h"
#include "FastShowerUtils/PolyArgs.h"
#include "FastShowerUtils/CoreSamples.h"
#include "FastShowerUtils/IFn.h"
#include "FastShowerUtils/LinearProcessor.h"
#include "FastShowerUtils/UpdatingGaussian.h"
#include "FastShowerUtils/ProcessedNormal.h"
#include "FastShowerUtils/IInTail.h"
#include "FastShowerUtils/SplitDecision.h"
#include "FastShowerUtils/IConfigurer.h"
#include <cmath>
#include <iostream>

namespace FastShower{

  using std::pair;

  const double C0EmEcalBar1::s_nSigma1(3.0);
  const double C0EmEcalBar1::s_nSigma2(5.0);
  const double C0EmEcalBar1::s_tailFluctScale(0.025);
  C0EmEcalBar1::C0EmEcalBar1(IUpdatingGaussian* g, 
                             IProcessedDist* t,
                             IInTail* inTail,
                             IFn* ts):
    ISampler(), ICell0(), DebugBase("C0EmEcalBar1"), 
    m_peak(g), m_tail(t), m_inTail(inTail), m_tailLowerBound(ts){}
  C0EmEcalBar1::C0EmEcalBar1(const IConfigurer* configurer,
                             const std::string&
                             ):
    DebugBase("C0"), m_peak(0), m_tail(0), m_inTail(0), m_tailLowerBound(0){
    m_peak           = configurer->findIUG( text()+"Peak" ) ;
    m_tail           = configurer->makeProcessedFlat( text() );
    m_inTail         = configurer->makeIInTail( text() );
    m_tailLowerBound = configurer->findFn( text()+"TailLowerBound");
    cout<<text()<<" finishing construction"<<endl;
  }
  ISampler* C0EmEcalBar1::clone() const {return new C0EmEcalBar1(*this);}

  void C0EmEcalBar1::sample(const PolyArgs& pa, CoreSamples& cs)const{
    
    if( m_inTail->operator()(pa) ){
      cs.fill(this, evalTail(pa) );
    }else{
      cs.fill(this, evalPeak(pa) );
    }
  }
  double C0EmEcalBar1::evalTail(const PolyArgs& pa) const {

    pair<double, double>  peakParams = m_peak->parameters(pa);
    double peakMean  = peakParams.first;
    double peakSigma = peakParams.second;
    //calculate ther upper and lower limits of the tails
    //
    // upper tail
    double energy = pa.pp()->energy();
    double uLimit2 = (energy<30.) ? 1.0 : peakMean + s_nSigma2*peakSigma;
    if(uLimit2>1.){ uLimit2=1.;}
    //
    double lLimit2 = peakMean + s_nSigma1*peakSigma;
    if(lLimit2>uLimit2){lLimit2 = uLimit2-peakSigma;}
    //
    // lower tail
    double uLimit1 = peakMean - s_nSigma1*peakSigma;
    //
    double lLimit1 = uLimit1 - ( m_tailLowerBound->value(pa) );
    //Add a little fluctuation in the lower base length
    ProcessedNormal temp;
    lLimit1 -= s_tailFluctScale*( abs( temp.sample() ) );
    if(lLimit1<0.){lLimit1=0.;}
    //
    if(uLimit1<0.){ uLimit1=peakMean;}
    
    double base1 = uLimit1-lLimit1;
    double base2 = uLimit2-lLimit2;
    double narrowBase;
    double narrowBaseStart;
    double wideBase;
    double wideBaseStart;
    
    if( base1>base2 ){
      wideBase = base1;
      wideBaseStart = lLimit1;
      narrowBase = base2;
      narrowBaseStart = lLimit2;
    }else{
      wideBase = base2;
      wideBaseStart = lLimit2;
      narrowBase = base1;
      narrowBaseStart = lLimit1;
    }   
    
    SplitDecision sp(narrowBase/wideBase);
    if ( sp.lower() ){
      LinearProcessor lp(narrowBase,narrowBaseStart);
      return m_tail->sample(&lp);
    }else{
      LinearProcessor lp(wideBase,wideBaseStart);
      return m_tail->sample(&lp);
    }
  }
  double C0EmEcalBar1::evalPeak(const PolyArgs& pa)const{
    return m_peak->sample(0.0,s_nSigma1,1.0,s_nSigma1,pa);
  }
  double C0EmEcalBar1::lastValue(const CoreSamples& cs) const {
    return cs.give(this);
  }
  void C0EmEcalBar1::components(IDebug::Cpts& v) const{
    v.push_back(m_peak);
    v.push_back(m_tail);
    v.push_back(m_inTail);
    v.push_back(m_tailLowerBound);
  }
 
}//namespace

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