ALFA_ODTracking.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#include "ALFA_LocRec/ALFA_ODTracking.h"
 
using namespace std;
 
ALFA_ODTracking::ALFA_ODTracking() :
    AthMessaging("ALFA_ODTracking")
{
    m_listResults.clear();
 
    m_iMultiplicityCut = 0;
    m_fDistanceCut = 0.0;
    m_iLayerCut = 0;
    m_iDataType = 0;
 
    memset(&m_iFibSel, 0, sizeof(m_iFibSel));
    std::fill_n(&m_iFibSel[0][0], sizeof(m_iFibSel)/sizeof(Int_t), 9999);
}
 
ALFA_ODTracking::~ALFA_ODTracking()
{
    m_listResults.clear();
}
 
StatusCode ALFA_ODTracking::Initialize(Int_t iMultiplicityCut, Float_t fDistanceCut, Int_t iLayerCut, Int_t iDataType)
{
    m_iMultiplicityCut = (int)iMultiplicityCut;
    m_fDistanceCut = fDistanceCut;
    m_iLayerCut = iLayerCut;
    m_iDataType = iDataType;
    
    return StatusCode::SUCCESS;
}
 
StatusCode ALFA_ODTracking::Execute(Int_t iRPot, const std::list<ODHIT> &ListODHits, Float_t faOD[RPOTSCNT][ODPLATESCNT][ODSIDESCNT][ODLAYERSCNT*ODFIBERSCNT], Float_t fbOD[RPOTSCNT][ODPLATESCNT][ODSIDESCNT][ODLAYERSCNT*ODFIBERSCNT])
{
    Int_t iLayer;
    FIBERS structFibers;
    std::map<int, FIBERS> MapLayers;
    MapLayers.clear();
    std::list<ODHIT>::const_iterator iter;
    for (iter=ListODHits.begin(); iter!=ListODHits.end(); ++iter)
    {
        if (iRPot == (*iter).iRPot)
        {
            iLayer = 2*(*iter).iPlate + (*iter).iSide;
            if(MapLayers.find(iLayer)==MapLayers.end())
            {
                structFibers.ListFibers.clear();
                MapLayers.insert(std::pair<int, FIBERS>(iLayer, structFibers));
                MapLayers[iLayer].ListFibers.push_back((*iter).iFiber);
            }
            else
            {
                MapLayers[iLayer].ListFibers.push_back((*iter).iFiber);
            }
        }
    }
 
    memset(&m_iMulti, 0, sizeof(m_iMulti));
 
    Int_t iSide, iPlate;
    Int_t iMaxLay = ODSIDESCNT*ODPLATESCNT;
    for (Int_t iLayer=0; iLayer<iMaxLay; iLayer++)
    {
        iPlate = iLayer/2;
        iSide = iLayer%2;
        m_iMulti[iSide][iPlate] = MapLayers[iLayer].ListFibers.size();
    }
 
    FiberProjection(iRPot, MapLayers, faOD, fbOD);
//  FindingPosition(iRPot, MapLayers, faOD, fbOD);
 
    return StatusCode::SUCCESS;
}
 
StatusCode ALFA_ODTracking::Finalize(std::list<ODRESULT>* pListResults)
{
    *pListResults = m_listResults;
 
    return StatusCode::SUCCESS;
}
 
void ALFA_ODTracking::FiberProjection(Int_t iRPot, std::map<int, FIBERS> &MapLayers, Float_t faOD[RPOTSCNT][ODPLATESCNT][ODSIDESCNT][ODLAYERSCNT*ODFIBERSCNT], Float_t fbOD[RPOTSCNT][ODPLATESCNT][ODSIDESCNT][ODLAYERSCNT*ODFIBERSCNT])
{
    const Int_t NBINTOT = 17000;
    Int_t iSign;
 
    std::vector<Int_t> iHitLayer[ODSIDESCNT];
        for (size_t i = 0; i < ODSIDESCNT; ++i) {
          iHitLayer[i].resize (NBINTOT);
        }
 
    Float_t fPosition;
    Float_t fFiberXPos = 23;
 
    fFiberXPos = (m_iDataType==1)? 22 : 23;
 
    std::list<int>::const_iterator iIter;
 
    ODRESULT Results;
 
    for (Int_t iSide=0; iSide<ODSIDESCNT; iSide++)
    {
        Results.iSide    = -1;
        Results.fRecPos  = -9999.0;
        Results.fOverY  = -9999.0;
        Results.iNumY   = -1;
 
        iSign = (iSide==0)? -1 : 1;
 
        for (Int_t iBin=0; iBin<NBINTOT; iBin++)
        {
            iHitLayer[iSide][iBin] = 0;
        }
 
        for (Int_t iPlate=0; iPlate<ODPLATESCNT; iPlate++)
        {
            //multiplicity cut
            if (MapLayers[2*iPlate+iSide].ListFibers.size()<=(UInt_t)m_iMultiplicityCut && !MapLayers[2*iPlate+iSide].ListFibers.empty())
            {
                //Making the projections
                for (iIter=MapLayers[2*iPlate+iSide].ListFibers.begin(); iIter!=MapLayers[2*iPlate+iSide].ListFibers.end(); ++iIter)
                {
//                  cout << "iPot, iPlate, iSide, iFiber = " << iRPot << ", " << iPlate << ", " << iSide << ", " << *iIter << endl;
                    fPosition = -1*(iSign*fFiberXPos*faOD[iRPot][iPlate][iSide][*iIter] + fbOD[iRPot][iPlate][iSide][*iIter]);
                    for (Int_t iBin=0; iBin<480; iBin++)
                    {
                        iHitLayer[iSide][(int)(((fPosition-0.24)*1000)+iBin-128000)]++;
                    }
                }
            }
        }
 
        Int_t iNum = 0;
        std::vector<int> *vecMaxHit = new std::vector<int>;
 
        //Determining the maximum overlap between fibers
        for (Int_t iBin=0; iBin<NBINTOT; iBin++)
        {
            if (iHitLayer[iSide][iBin]>iNum) iNum = iHitLayer[iSide][iBin];
        }
 
        //Determining the position and the width of the maximum
        //iNum = <0;3> depends on the count of hit layers
        if (iNum>=m_iLayerCut)
        {
            for (Int_t iBin=0; iBin<NBINTOT; iBin++)
            {
                if (iHitLayer[iSide][iBin]==iNum)
                {
                    vecMaxHit->push_back(iBin);
                }
            }
 
            Float_t fHitMinPos, fHitMaxPos;
//          Int_t iHitMinPos_tmp, iHitMaxPos_tmp;
//          Int_t iFullWidth;
 
            fHitMinPos = -128.0 - (double)(vecMaxHit->front())*1e-3;
            fHitMaxPos = -128.0 - (double)(vecMaxHit->back())*1e-3;
 
//          iHitMinPos_tmp = vecMaxHit->front();
//          iHitMaxPos_tmp = vecMaxHit->back();
 
            // Making sure that the plateau belongs to the same track
//          iFullWidth = vecMaxHit->size();
 
//          for (Int_t i=0; i<iFullWidth; i++)
//          {
//              if (vecMaxHit->at(iFullWidth-i-1)-iHitMinPos_tmp < 500)
//              {
//                  iHitMaxPos_tmp = vecMaxHit->at(iFullWidth-i-1);
//                  fHitMaxPos = -128.0 - (double)(iHitMaxPos_tmp)*1e-3;
//                  break;
//              }
//          }
 
            if ((fHitMinPos-fHitMaxPos)<m_fDistanceCut)
            {
                fPosition       = (fHitMinPos + fHitMaxPos)/2.0;
                Results.iSide    = iSide;
                Results.fRecPos  = fPosition;
                Results.fOverY  = fHitMinPos-fHitMaxPos;
                Results.iNumY   = iNum;
                m_listResults.push_back(Results);
            }
 
            // m_iFibSelOD ------------------------------------------------------------------
            Float_t fMin = 0.0;
            Float_t fDist = 0.0/*, fDistMin = 0.0*/;
            Int_t iFibSel = 9999;
 
            if (Results.fRecPos !=-9999.0)
            {
                for (Int_t iPlate=0; iPlate<ODPLATESCNT; iPlate++)
                {
                    iFibSel = 9999;
                    fMin = 0.24/cos(TMath::Pi()/4.0);
 
                    for (iIter=MapLayers[2*iPlate+iSide].ListFibers.begin(); iIter!=MapLayers[2*iPlate+iSide].ListFibers.end(); ++iIter)
                    {
                        fPosition = iSign*fFiberXPos*faOD[iRPot][iPlate][iSide][*iIter] + fbOD[iRPot][iPlate][iSide][*iIter];
                        fDist = TMath::Abs(Results.fRecPos-fPosition);
 
                        if (fDist<=fMin)
                        {
//                          fDistMin = Results.fRecPos-fPosition;
                            fMin = fDist;
                            iFibSel = *iIter;
                        }
                    }
 
                    m_iFibSel[iSide][iPlate] = iFibSel;
                }
            }
        }
 
 
        delete vecMaxHit;
    }
}
 
void ALFA_ODTracking::FindingPosition(Int_t iRPot, std::map<int, FIBERS> &MapLayers, Float_t faOD[RPOTSCNT][ODPLATESCNT][ODSIDESCNT][ODLAYERSCNT*ODFIBERSCNT], Float_t fbOD[RPOTSCNT][ODPLATESCNT][ODSIDESCNT][ODLAYERSCNT*ODFIBERSCNT])
{
    Int_t iSign;
    Float_t fDistanceA;
    Float_t fDistanceB;
    Float_t fPosition;
 
    Float_t fFiberXPos = 23;
    fFiberXPos = (m_iDataType==1)? 22 : 23;
 
    ODRESULT Results;
    Results.clear();
 
//  std::list<int>::iterator intIter0;
//  std::list<int>::iterator intIter1;
//  std::list<int>::iterator intIter2;
    std::list<int>::const_iterator intIter0;
    std::list<int>::const_iterator intIter1;
    std::list<int>::const_iterator intIter2;
 
    for (Int_t iSide=0; iSide<ODSIDESCNT; iSide++)
    {
        iSign = (iSide==0) ? -1 : 1;
 
        if (((Int_t)MapLayers[0+iSide].ListFibers.size()<=m_iMultiplicityCut) && ((Int_t)MapLayers[2+iSide].ListFibers.size()<=m_iMultiplicityCut) && ((Int_t)MapLayers[4+iSide].ListFibers.size()<=m_iMultiplicityCut))
        {
            if (!MapLayers[0+iSide].ListFibers.empty())
            {
                for (intIter0=MapLayers[0+iSide].ListFibers.begin(); intIter0!=MapLayers[0+iSide].ListFibers.end(); ++intIter0)
                {
                    if (!MapLayers[2+iSide].ListFibers.empty())
                    {
                        for (intIter1=MapLayers[2+iSide].ListFibers.begin(); intIter1!=MapLayers[2+iSide].ListFibers.end(); ++intIter1)
                        {
                            if (!MapLayers[4+iSide].ListFibers.empty())
                            {
                                for (intIter2=MapLayers[4+iSide].ListFibers.begin(); intIter2!=MapLayers[4+iSide].ListFibers.end(); ++intIter2)
                                {
                                    fDistanceA = TMath::Abs(iSign*fFiberXPos*faOD[iRPot][0][iSide][*intIter0] + fbOD[iRPot][0][iSide][*intIter0] - iSign*fFiberXPos*faOD[iRPot][1][iSide][*intIter1] - fbOD[iRPot][1][iSide][*intIter1]);
                                    fDistanceB = TMath::Abs(iSign*fFiberXPos*faOD[iRPot][1][iSide][*intIter1] + fbOD[iRPot][1][iSide][*intIter1] - iSign*fFiberXPos*faOD[iRPot][2][iSide][*intIter2] - fbOD[iRPot][2][iSide][*intIter2]);
 
                                    if (fDistanceA<m_fDistanceCut && fDistanceB<m_fDistanceCut)
                                    {
                                        fPosition = (iSign*fFiberXPos*faOD[iRPot][0][iSide][*intIter0]+fbOD[iRPot][0][iSide][*intIter0] + iSign*fFiberXPos*faOD[iRPot][1][iSide][*intIter1]+fbOD[iRPot][1][iSide][*intIter1] + iSign*fFiberXPos*faOD[iRPot][2][iSide][*intIter2]+fbOD[iRPot][2][iSide][*intIter2])/3.0;
                                        Results.iSide   = iSide;
                                        Results.fRecPos  = fPosition;
                                        m_listResults.push_back(Results);
                                    }
                                }
                            }
                            else
                            {
                                fDistanceA = TMath::Abs(iSign*fFiberXPos*faOD[iRPot][0][iSide][*intIter0]+fbOD[iRPot][0][iSide][*intIter0] - iSign*fFiberXPos*faOD[iRPot][1][iSide][*intIter1]-fbOD[iRPot][1][iSide][*intIter1]);
                                if (fDistanceA < m_fDistanceCut)
                                {
                                    fPosition = (iSign*fFiberXPos*faOD[iRPot][0][iSide][*intIter0]+fbOD[iRPot][0][iSide][*intIter0] + iSign*fFiberXPos*faOD[iRPot][1][iSide][*intIter1]+fbOD[iRPot][1][iSide][*intIter1])/2.0;
                                    Results.iSide   = iSide;
                                    Results.fRecPos  = fPosition;
                                    m_listResults.push_back(Results);
                                }
                            }
                        }
                    }
                    else
                    {
                        if (!MapLayers[4+iSide].ListFibers.empty())
                        {
                            for (intIter2=MapLayers[2*2+iSide].ListFibers.begin(); intIter2!=MapLayers[2*2+iSide].ListFibers.end(); ++intIter2)
                            {
                                fDistanceA = TMath::Abs(iSign*fFiberXPos*faOD[iRPot][0][iSide][*intIter0]+fbOD[iRPot][0][iSide][*intIter0] - iSign*fFiberXPos*faOD[iRPot][2][iSide][*intIter2]-fbOD[iRPot][2][iSide][*intIter2]);
                                if (fDistanceA < m_fDistanceCut)
                                {
                                    fPosition = (iSign*fFiberXPos*faOD[iRPot][0][iSide][*intIter0]+fbOD[iRPot][0][iSide][*intIter0] + iSign*fFiberXPos*faOD[iRPot][2][iSide][*intIter2]+fbOD[iRPot][2][iSide][*intIter2])/2.0;
                                    Results.iSide   = iSide;
                                    Results.fRecPos  = fPosition;
                                    m_listResults.push_back(Results);
                                }
                            }
                        }
                    }
                }
            }
            else
            {
                if (!MapLayers[2+iSide].ListFibers.empty())
                {
                    for (intIter1=MapLayers[2*1+iSide].ListFibers.begin(); intIter1!=MapLayers[2*1+iSide].ListFibers.end(); ++intIter1)
                    {
                        if (!MapLayers[4+iSide].ListFibers.empty())
                        {
                            for (intIter2=MapLayers[2*2+iSide].ListFibers.begin(); intIter2!=MapLayers[2*2+iSide].ListFibers.end(); ++intIter2)
                            {
                                fDistanceB = TMath::Abs(iSign*fFiberXPos*faOD[iRPot][1][iSide][*intIter1]+fbOD[iRPot][1][iSide][*intIter1] - iSign*fFiberXPos*faOD[iRPot][2][iSide][*intIter2]-fbOD[iRPot][2][iSide][*intIter2]);
                                if (fDistanceB<m_fDistanceCut)
                                {
                                    fPosition = (iSign*fFiberXPos*faOD[iRPot][1][iSide][*intIter1]+fbOD[iRPot][1][iSide][*intIter1] + iSign*fFiberXPos*faOD[iRPot][2][iSide][*intIter2]+fbOD[iRPot][2][iSide][*intIter2])/2.0;
                                    Results.iSide    = iSide;
                                    Results.fRecPos  = fPosition;
                                    m_listResults.push_back(Results);
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}
 
void ALFA_ODTracking::GetData(Int_t (&iFibSel)[ODSIDESCNT][ODPLATESCNT])
{
    ATH_MSG_DEBUG("begin ALFA_ODTracking::GetData()");
 
 
    for (int iSide=0; iSide<ODSIDESCNT; iSide++)
    {
        for (int iPlate=0; iPlate<ODPLATESCNT; iPlate++)
        {
            iFibSel[iSide][iPlate] = m_iFibSel[iSide][iPlate];
        }
    }
 
    ATH_MSG_DEBUG("end ALFA_ODTracking::GetData()");
}