ALFA_MDTracking.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#include "ALFA_LocRec/ALFA_MDTracking.h"
 
ALFA_MDTracking::ALFA_MDTracking() :
    AthMessaging("ALFA_MDTracking")
{
    ATH_MSG_DEBUG("begin ALFA_MDTracking::ALFA_MDTracking");
 
    m_iNumU = 0;
    m_iNumV = 0;
    m_fOverlapU = -9999.0;
    m_fOverlapV = -9999.0;
 
 
    m_iMultiplicityCut = 0;
    m_iUVCut = 0;
    m_fOverlapCut = 0.0;
    m_fRecXPos = 0.0;
    m_fRecYPos = 0.0;
    m_iRPot = 0;
 
    memset(&m_iFibSel, 0, sizeof(m_iFibSel));
    std::fill_n(m_iFibSel, sizeof(m_iFibSel)/sizeof(Int_t), -9999);
 
    ATH_MSG_DEBUG("end ALFA_MDTracking::ALFA_MDTracking");
}
 
ALFA_MDTracking::~ALFA_MDTracking()
{
    ATH_MSG_DEBUG("begin ALFA_MDTracking::~ALFA_MDTracking");
    ATH_MSG_DEBUG("end ALFA_MDTracking::~ALFA_MDTracking");
}
 
StatusCode ALFA_MDTracking::Initialize(Float_t faMD[RPOTSCNT][ALFALAYERSCNT*ALFAPLATESCNT][ALFAFIBERSCNT], Float_t fbMD[RPOTSCNT][ALFALAYERSCNT*ALFAPLATESCNT][ALFAFIBERSCNT], Int_t iMultiplicityCut, Int_t iUVCut, Float_t fOverlapCut)
{
    ATH_MSG_DEBUG("begin ALFA_MDTracking::Initialize()");
 
    m_iMultiplicityCut = iMultiplicityCut;
    m_iUVCut = iUVCut;
    m_fOverlapCut = fOverlapCut;
 
    for (Int_t iRPot = 0; iRPot < RPOTSCNT; iRPot++)
    {
        for (Int_t iLayer = 0; iLayer < ALFALAYERSCNT*ALFAPLATESCNT; iLayer++)
        {
            for (Int_t iFiber = 0; iFiber < ALFAFIBERSCNT; iFiber++)
            {
                m_faMD[iRPot][iLayer][iFiber] = faMD[iRPot][iLayer][iFiber];
                m_fbMD[iRPot][iLayer][iFiber] = fbMD[iRPot][iLayer][iFiber];
            }
        }
    }
 
    ATH_MSG_DEBUG("end ALFA_MDTracking::Initialize()");
 
    return StatusCode::SUCCESS;
}
 
StatusCode ALFA_MDTracking::Execute(Int_t iRPot, const std::list<MDHIT> &ListMDHits)
{
    ATH_MSG_DEBUG("ALFA_MDTracking::Execute()");
 
    FIBERS structFibers;
    Int_t iNumUFiberHits = 0;
    Int_t iNumVFiberHits = 0;
 
    m_iRPot = iRPot;
    m_MapLayers.clear();
 
    std::list<MDHIT>::const_iterator iter;
    for (iter=ListMDHits.begin(); iter!=ListMDHits.end(); ++iter)
    {
        if (iRPot == (*iter).iRPot)
        {
            if(m_MapLayers.find((*iter).iPlate)==m_MapLayers.end())
            {
                structFibers.ListFibers.clear();
                m_MapLayers.insert(std::pair<int, FIBERS>((*iter).iPlate, structFibers));
                m_MapLayers[(*iter).iPlate].ListFibers.push_back((*iter).iFiber);
            }
            else
            {
                m_MapLayers[(*iter).iPlate].ListFibers.push_back((*iter).iFiber);
            }
        }
    }
 
    //Checking that the multiplicity cut conditions are satisfied
    //At least more than UV_cut layers have a multiplicity lower than multi_cut
    for (Int_t iLayer=0; iLayer<ALFALAYERSCNT*ALFAPLATESCNT; iLayer++)
    {
        if ((Int_t)m_MapLayers[iLayer].ListFibers.size()<=m_iMultiplicityCut && (Int_t)m_MapLayers[iLayer].ListFibers.size()>0)
        {
            if (fmod(double(iLayer),double(2)) == 1) iNumUFiberHits++;
            else iNumVFiberHits++;
        }
    }
 
    m_fRecXPos = -9999.0;
    m_fRecYPos = -9999.0;
    m_fOverlapU = -9999.0;
    m_fOverlapV = -9999.0;
 
    memset(&m_iFibSel, 0, sizeof(m_iFibSel));
    std::fill_n(m_iFibSel, sizeof(m_iFibSel)/sizeof(Int_t), -9999);
 
    if (iNumUFiberHits>=m_iUVCut && iNumVFiberHits>=m_iUVCut) OverLap();
 
    ATH_MSG_DEBUG("end ALFA_MDTracking::Execute()");
    return StatusCode::SUCCESS;
}
 
StatusCode ALFA_MDTracking::Finalize(Float_t &fRecXPos, Float_t &fRecYPos)
{
    ATH_MSG_DEBUG("begin ALFA_MDTracking::Finalize()");
 
    fRecXPos = m_fRecXPos;
    fRecYPos = m_fRecYPos;
 
    ATH_MSG_DEBUG("end ALFA_MDTracking::Execute()");
 
    return StatusCode::SUCCESS;
}
 
void ALFA_MDTracking::HistFill(Float_t &b_p, Float_t &b_n, Float_t &fOverP, Float_t &fOverN, Int_t &iNumU, Int_t &iNumV, Int_t iFlag)
{
    ATH_MSG_DEBUG("begin ALFA_MDTracking::HistFill()");
 
    Int_t iHit;
    Float_t fFibCen;
    Float_t fbRef[2] = {-127.0, -127.0};
    Float_t fXInter, fYInter;
    Float_t fMinP, fMaxP;
    Float_t fMinN, fMaxN;
    Int_t iMinP_tmp, iMaxP_tmp;
    Int_t iMinN_tmp, iMaxN_tmp;
    Int_t iFullWidth;
    const Int_t NBINTOT = 72000;
        std::vector<Int_t> Over_p(NBINTOT);
        std::vector<Int_t> Over_n(NBINTOT);
 
    if (iFlag==0) //First call, Event not reconstructed for U and V
    {
        fbRef[0]=-127.0;
        fbRef[1]=-127.0;
    }
 
    if (iFlag==1) //Event reconstructed for U but not for V so let's try to refine
    {
        fbRef[0]=b_p;
        fbRef[1]=-127.0;
    }
 
    if (iFlag==2) //Event reconstructed for V but not for U so let's try to refine
    {
        fbRef[0]=-127.0;
        fbRef[1]=b_n;
    }
 
    if (iFlag==3) //Event reconstructed for U and V, ultime refinement
    {
        fbRef[0]=b_p;
        fbRef[1]=b_n;
    }
 
    for (Int_t iBin=0;iBin<72000;iBin++)
    {
        Over_p[iBin]=0;
        Over_n[iBin]=0;
    }
 
    std::list<int>::iterator iter;
    for (Int_t iLayer=0; iLayer<ALFALAYERSCNT*ALFAPLATESCNT; iLayer++)
    {
        for (iter=m_MapLayers[iLayer].ListFibers.begin(); iter!=m_MapLayers[iLayer].ListFibers.end(); ++iter)
        {
            iHit = *iter;
 
            if (m_faMD[m_iRPot][iLayer][iHit]>=0)
            {
                fXInter = (fbRef[1]-m_fbMD[m_iRPot][iLayer][iHit])/(1+m_faMD[m_iRPot][iLayer][iHit]);
                fYInter = (m_faMD[m_iRPot][iLayer][iHit]*fbRef[1]+m_fbMD[m_iRPot][iLayer][iHit])/(1+m_faMD[m_iRPot][iLayer][iHit])-fbRef[1];
                fFibCen = (fYInter-fXInter)/sqrt(2.0);
 
                for (Int_t bin=0;bin<480;bin++)
                {
                    Over_p[(int)((fFibCen-0.24)*1000)+bin+36000]++;
                }
            }
            else
            {
                fXInter = (m_fbMD[m_iRPot][iLayer][iHit]-fbRef[0])/(1-m_faMD[m_iRPot][iLayer][iHit]);
                fYInter = (m_fbMD[m_iRPot][iLayer][iHit]-m_faMD[m_iRPot][iLayer][iHit]*fbRef[0])/(1-m_faMD[m_iRPot][iLayer][iHit])-fbRef[0];
                fFibCen = (fYInter+fXInter)/sqrt(2.0);
 
                for (Int_t bin=0;bin<480;bin++)
                {
                    Over_n[(int)((fFibCen-0.24)*1000)+bin+36000]++;
                }
            }
        }
    }
 
    //Determine maximum
    iNumU=0;
    iNumV=0;
 
    std::vector<int> *vecMaxP = new std::vector<int>;
    std::vector<int> *vecMaxN = new std::vector<int>;
 
    for (Int_t i=0;i<72000;i++)
    {
        if (Over_p[i]>iNumU) iNumU = Over_p[i];
        if (Over_n[i]>iNumV) iNumV = Over_n[i];
    }
 
    if (iNumU>=m_iUVCut) // If more than m_iUVCut fibers in the maximum we do the reconstruction
    {
        for (Int_t i=0; i<NBINTOT; i++)
        {
            if (Over_p[i]==iNumU)
            {
                vecMaxP->push_back(i);
            }
        }
 
        fMinP     = -36.0 + double(vecMaxP->front())*1e-3;
        fMaxP     = -36.0 + double(vecMaxP->back())*1e-3;
        iMinP_tmp = vecMaxP->front();
        iMaxP_tmp = vecMaxP->back();
 
//      Making sure that the plateau belongs to the same track
        iFullWidth = vecMaxP->size();
 
        for (Int_t i=0; i<iFullWidth; i++)
        {
            if (vecMaxP->at(iFullWidth-i-1)-iMinP_tmp < 500)
            {
                iMaxP_tmp = vecMaxP->at(iFullWidth-i-1);
                fMaxP     = -36.0 + double(iMaxP_tmp)*1e-3;
                break;
            }
        }
 
        if ((fMaxP-fMinP)<m_fOverlapCut) //Check for multiple tracks
        {
            b_p = fbRef[1]+(fMinP+fMaxP)/sqrt(2.);
            fOverP = fMaxP-fMinP;
        }
        else
        {
            b_p = -9999.0;
            fOverP = -9999.0;
        }
    }
    else
    {
        b_p = -9999.0;
        fOverP = -9999.0;
    }
 
    if (iNumV>=m_iUVCut) // If more than m_iUVCut fibers in the maximum we do the reconstruction
    {
        for (Int_t i=0; i<NBINTOT; i++)
        {
            if (Over_n[i]==iNumV)
            {
                vecMaxN->push_back(i);
            }
        }
 
        fMinN     = -36.0 + double(vecMaxN->front())*1e-3;
        fMaxN     = -36.0 + double(vecMaxN->back())*1e-3;
        iMinN_tmp = vecMaxN->front();
        iMaxN_tmp = vecMaxN->back();
 
//      Making sure that the plateau belongs to the same track
        iFullWidth = vecMaxN->size();
 
        for (Int_t i=0; i<iFullWidth; i++)
        {
            if (vecMaxN->at(iFullWidth-i-1)-iMinN_tmp < 500)
            {
                iMaxN_tmp = vecMaxN->at(iFullWidth-i-1);
                fMaxN     = -36.0 + double(iMaxN_tmp)*1e-3;
                break;
            }
        }
 
        if ((fMaxN-fMinN)<m_fOverlapCut) //Check for multiple tracks
        {
            b_n = fbRef[0]+(fMinN+fMaxN)/sqrt(2.);
            fOverN = fMaxN-fMinN;
        }
        else
        {
            b_n = -9999.0;
            fOverN = -9999.0;
        }
    }
    else
    {
        b_n = -9999.0;
        fOverN = -9999.0;
    }
 
//  if (b_p!=-9999.0 && b_n!=-9999.0)
//  {
//      if ((b_n+b_p)/2.0<=-135.5 && (iNumU>=m_iUVCut && iNumV>=m_iUVCut))
//      {
//          b_n = -9999.0;
//          b_p = -9999.0;
//      }
//  }
 
    delete vecMaxP;
    delete vecMaxN;
 
    ATH_MSG_DEBUG("endl ALFA_MDTracking::HistFill()");
}
 
void ALFA_MDTracking::OverLap()
{
    ATH_MSG_DEBUG("ALFA_MDTracking::OverLap()");
 
    Float_t fBMeanN = -9999.0;
    Float_t fBMeanP = -9999.0;
    Float_t fOverRegP;
    Float_t fOverRegN;
    Int_t iNumU, iNumV;
 
    //First call, projection on middle fiber for U and V
    HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 0);
 
    //If first projection worked, we do the ultimate one
    if (fBMeanP!=-9999.0 && fBMeanN!=-9999.0)
    {
        HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 3);
        if (fBMeanP!=-9999.0 && fBMeanN!=-9999.0)
        {
            HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 3);
        }
    }
    else
    {
        //If first projection worked for p side but not for n, we try to refine n projection using the information from p side
        if (fBMeanP!=-9999.0 && fBMeanN==-9999.0)
        {
            HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 1);
 
            if (fBMeanP!=-9999.0 && fBMeanN!=-9999.0)
            {
                //if it as worked for both we do the ultimate one
                HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 3);
                if (fBMeanP!=-9999.0 && fBMeanN!=-9999.0) HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 3);
            }
        }
 
        //If first projection worked for p side but not for n, we try to refine n projection using the information from p side
        if (fBMeanP==-9999.0 && fBMeanN!=-9999.0)
        {
            HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 2);
 
            if (fBMeanP!=-9999.0 && fBMeanN!=-9999.0)
            {
                //if it as worked for both we do the ultimate one
                HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 3);
                if (fBMeanP!=-9999.0 && fBMeanN!=-9999.0) HistFill(fBMeanP, fBMeanN, fOverRegP, fOverRegN, iNumU, iNumV, 3);
            }
        }
    }
 
    Float_t fxTmp, fyTmp;
    Float_t fMinX,fMinY;
    Float_t fDistX,fDistY;
//  Float_t fDistMinX,fDistMinY;
    Int_t iHit;
    Float_t fOverlapU, fOverlapV;
    Int_t iFibSelX, iFibSelY;
 
    std::list<int>::iterator iter;
    if (fBMeanP!=-9999.0 && fBMeanN!=-9999.0)
    {
        m_fRecXPos = (fBMeanN-fBMeanP)/2.0;
        m_fRecYPos = (fBMeanN+fBMeanP)/2.0;
        fOverlapU = fOverRegP;
        fOverlapV = fOverRegN;
 
        for (Int_t iLayer=0; iLayer<ALFALAYERSCNT*ALFAPLATESCNT; iLayer++)
        {
            fMinX = 0.24/cos(TMath::Pi()/4.0);
            fMinY = 0.24/cos(TMath::Pi()/4.0);
 
            iFibSelX = -9999, iFibSelY = -9999;
            for (iter=m_MapLayers[iLayer].ListFibers.begin(); iter!=m_MapLayers[iLayer].ListFibers.end(); ++iter)
            {
                iHit = *iter;
                fxTmp = (m_fRecYPos-m_fbMD[m_iRPot][iLayer][iHit])/m_faMD[m_iRPot][iLayer][iHit];
                fyTmp = m_faMD[m_iRPot][iLayer][iHit]*m_fRecXPos+m_fbMD[m_iRPot][iLayer][iHit];
                fDistX = TMath::Abs(m_fRecXPos-fxTmp);
                fDistY = TMath::Abs(m_fRecYPos-fyTmp);
 
                if (fDistX<=fMinX)
                {
//                  fDistMinX = m_fRecXPos-fxTmp;
                    fMinX = fDistX;
                    iFibSelX = iHit;
                }
 
                if (fDistY<=fMinY)
                {
//                  fDistMinY = m_fRecYPos-fyTmp;
                    fMinY = fDistY;
                    iFibSelY = iHit;
                }
            }
 
            if (iFibSelX==iFibSelY) m_iFibSel[iLayer] = iFibSelX;
        }
    }
    else
    {
        m_fRecXPos = -9999.0;
        m_fRecYPos = -9999.0;
        iNumU = 0;
        iNumV = 0;
        fOverlapU = -9999.0;
        fOverlapV = -9999.0;
    }
 
    SetData(iNumU, iNumV, fOverlapU, fOverlapV);
 
    ATH_MSG_DEBUG("end ALFA_MDTracking::OverLap()");
}
 
void ALFA_MDTracking::SetData(Int_t iNumU, Int_t iNumV, Float_t fOverlapU, Float_t fOverlapV)
{
    ATH_MSG_DEBUG("begin ALFA_MDTracking::SetData()");
 
    m_iNumU = iNumU;
    m_iNumV = iNumV;
    m_fOverlapU = fOverlapU;
    m_fOverlapV = fOverlapV;
 
    ATH_MSG_DEBUG("end ALFA_MDTracking::SetData()");
}
 
void ALFA_MDTracking::GetData(Int_t &iNumU, Int_t &iNumV, Float_t &fOverlapU, Float_t &fOverlapV, Int_t (&iFibSel)[ALFALAYERSCNT*ALFAPLATESCNT])
{
    ATH_MSG_DEBUG("begin ALFA_MDTracking::GetData()");
 
    iNumU = m_iNumU;
    iNumV = m_iNumV;
    fOverlapU = m_fOverlapU;
    fOverlapV = m_fOverlapV;
 
    for (Int_t iLayer=0; iLayer<ALFALAYERSCNT*ALFAPLATESCNT; iLayer++)
    {
        iFibSel[iLayer] = m_iFibSel[iLayer];
    }
 
    ATH_MSG_DEBUG("end ALFA_MDTracking::GetData()");
}