CaloTools.h

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//

#ifndef L1Trigger_L1TCommon_CaloTools_h
#define L1Trigger_L1TCommon_CaloTools_h

#include "DataFormats/L1TCalorimeter/interface/CaloTower.h"
#include "DataFormats/L1TCalorimeter/interface/CaloCluster.h"

namespace l1t {

  class CaloTools{
  
    //class is not designed to be instanced
  private:
    CaloTools(){}
    ~CaloTools(){}
  
  private:
    //temporary location of these key parameters, probably should be read in from a database
    //they are private to stop people using them as they will change (naming is invalid for a start)
    static const int kHBHEEnd=28;
    static const int kHFBegin=29;
    static const int kHFEnd=32;
    static const int kHFPhiSeg=4;
    static const int kHFNrPhi=72/kHFPhiSeg;
    static const int kHBHENrPhi=72;
    static const int kNrTowers = ((kHFEnd-kHFBegin+1)*kHFNrPhi + kHBHEEnd*kHBHENrPhi )*2;
    static const int kNrHBHETowers = kHBHEEnd*kHBHENrPhi*2;

  public:
    enum SubDet{ECAL=0x1,HCAL=0x2,CALO=0x3}; //CALO is a short cut for ECAL|HCAL

    static const l1t::CaloTower&   getTower(const std::vector<l1t::CaloTower>& towers,int iEta,int iPhi);
    static const l1t::CaloCluster& getCluster(const std::vector<l1t::CaloCluster>& clusters,int iEta,int iPhi);

    //returns a hash suitable for indexing a vector, returns caloTowerHashMax if invalid iEta,iPhi
    static size_t caloTowerHash(int iEta,int iPhi);

    //returns maximum size of hash, for vector allocation
    static size_t caloTowerHashMax();

    //checks if the iEta, iPhi is valid (ie -28->28, 1->72; |29|->|32|,1-72, %4=1)
    static bool isValidIEtaIPhi(int iEta,int iPhi);
    
    //returns the hw Et sum of of a rectangle bounded by iEta-localEtaMin,iEta+localEtaMax,iPhi-localPhiMin,iPhi-localPhiMax (inclusive)
    //sum is either ECAL, HCAL or CALO (ECAL+HCAL) Et
    static int calHwEtSum(int iEta,int iPhi,const std::vector<l1t::CaloTower>& towers,
              int localEtaMin,int localEtaMax,int localPhiMin,int localPhiMax,SubDet etMode=CALO);
    static int calHwEtSum(int iEta,int iPhi,const std::vector<l1t::CaloTower>& towers,
              int localEtaMin,int localEtaMax,int localPhiMin,int localPhiMax,
              int iEtaAbsMax,SubDet etMode=CALO);


    //returns the number of towers with minHwEt<=hwEt<=maxHwEt and iEtaMin<=iEta<=iEtaMax and iPhiMin<=iPhi<=iPhiMax
    //hwEt is either ECAL, HCAL or CALO (ECAL+HCAL) Et
    static size_t calNrTowers(int iEtaMin,int iEtaMax,int iPhiMin,int iPhiMax,const std::vector<l1t::CaloTower>& towers,int minHwEt,int maxHwEt,SubDet etMode=CALO);

    // physical eta/phi position and sizes of trigger towers
    static float towerEta(int ieta);
    static float towerPhi(int ieta, int iphi);
    static float towerEtaSize(int ieta);
    static float towerPhiSize(int ieta);


  private:
    // trigger tower eta boundaries
    static std::pair<float,float> towerEtaBounds(int ieta);

    static const l1t::CaloTower nullTower_; //to return when we need to return a tower which was not found/invalid rather than throwing an exception
    static const l1t::CaloCluster nullCluster_; //to return when we need to return a cluster which was not found/invalid rather than throwing an exception
  };

}


#endif