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#include <iostream>
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#include <vector>
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#define MAXCENTRALITYBINS 40
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//Root macro for using centrality bins in analysis in root.
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namespace CmsHi{
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static double hf[MAXCENTRALITYBINS] = {-0.5, 91.2201, 190.066, 289.348, 429.714, 610.668, 769.197, 1003.86, 1295.14, 1714.93, 2019.53, 2580.84, 3110.32, 3851.92, 4842.85, 5763.9, 7031.81, 8352.1, 9838.89, 12019.2, 14406.3, 16375.5, 19378.5, 23245.1, 25952.2, 28804.9, 33745.5, 37747, 42576, 46784.8, 52114.6, 57125.6, 64232.7, 72537.2, 82239.3, 89429.5, 99463.8, 109535, 120721, 136768}; // For 3_1_X. Used 2000 events.
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//static double hf[MAXCENTRALITYBINS] = { -3.79397, 41.8848, 100.592, 164.598, 245.863, 332.547, 425.167, 541.657, 686.035, 883.485, 1100.38, 1353.79, 1674.68, 2111.32, 2626.57, 3204.19, 3882.45, 4705.5, 5618.47, 6718.37, 7847.97, 9183.42, 10710.5, 12352, 14111.4, 15915.1, 18050.8, 20267.3, 22969.3, 25847.9, 29106.6, 32622.2, 36850.7, 41185, 46138.2, 51728.2, 57773.7, 66330.7, 76926.8, 88238.4}; // For 2_2_X. Used 14373 events.
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/*
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static double hfgen[MAXCENTRALITYBINS] = {};
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static double npart[MAXCENTRALITYBINS] = {};
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static double b[MAXCENTRALITYBINS] = {};
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*/
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class Centrality{
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public:
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Centrality(const char* label, int nbins) : label_(label), nbins_(nbins){
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bins_.reserve(nbins_);
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for(int i = 0; i < nbins_; ++i){
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if(label_ == "hf")
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bins_[i] = hf[i*(int)(MAXCENTRALITYBINS/nbins_)];
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}
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}
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~Centrality() {;}
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double getNpart() {return 0;}
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double getNcoll() {return 0;}
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double getNhard(){return 0;}
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double getB(){return 0;}
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int getBin(double value);
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void info();
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private:
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const char* label_;
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vector<double> bins_;
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int nbins_;
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};
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int Centrality::getBin(double value){
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int bin = -9;
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int ibin = -9;
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for(int i = 0; i< nbins_; i++){
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double min = bins_[i];
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if(value >= min) ibin = i;
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// if(value < min ) break;
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}
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if(label_ == "b")bin = ibin+1;
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else bin = nbins_ - ibin;
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if(ibin < 0) cout<<"Warning : Bin not determined correctly - "<<bin<<endl;
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return bin;
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}
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void Centrality::info(){
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std::cout<<"Centrality is based on "<<label_<<std::endl;
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}
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}
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