#include <HcalShapeIntegrator.h>

Public Member Functions
	HcalShapeIntegrator (const HcalPulseShapes::Shape *aShape)

float	operator() (double startTime, double stopTime) const

Private Member Functions
float	at (double time) const

Private Attributes
int	nbin_

std::vector< float >	v_

Detailed Description

This class takes an existing Shape, and integrates it, summing up all the values, each nanosecond

Definition at line 12 of file HcalShapeIntegrator.h.

Constructor & Destructor Documentation

◆ HcalShapeIntegrator()

HcalShapeIntegrator::HcalShapeIntegrator ( const HcalPulseShapes::Shape * aShape )

Definition at line 4 of file HcalShapeIntegrator.cc.

                                                                           : nbin_(shape->nbins()), v_(nbin_, 0.) {
   for (int t = 0; t < nbin_; ++t) {
     double amount = shape->at(t);
     for (int ibin = t; ibin < nbin_; ++ibin) {
       // v_ holds the cumulative integral
       v_[ibin] += amount;
     }
   }
 }

References HcalPulseShape::at(), nbin_, OrderedSet::t, and v_.

Member Function Documentation

◆ at()

float HcalShapeIntegrator::at ( double time ) const

private

Definition at line 14 of file HcalShapeIntegrator.cc.

                                             {
   // shape is in 1 ns steps
   // I round down to match the old algorithm
   int i = (int)(t - 0.5);
   float rv = 0;
   if (i < 0) {
     rv = 0.;
   } else if (i >= nbin_) {
     rv = v_.back();
   } else {
     rv = v_[i];
     // maybe interpolate
     // assume 1 ns bins
     float f = (t - 0.5 - i);
     if (++i < nbin_ && f > 0) {
       rv = rv * (1. - f) + v_[i] * f;
     }
   }
   return rv;
 }