ALFA_HalfReco.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#include "ALFA_LocRec/ALFA_HalfReco.h"
 
ALFA_HalfReco::ALFA_HalfReco() :
    AthMessaging("ALFA_HalfReco")
{
    ATH_MSG_DEBUG("begin ALFA_HalfReco::ALFA_HalfReco");
 
    m_fOvU = 0.0;
    m_fOvV = 0.0;
    m_fOverlapCut = 0.0;
    m_fRecXPos = -9999.0;
    m_fRecYPos = -9999.0;
    m_iHalf = 0;
    m_iMultiplicityCut = 0;
 
//  memset(&m_iNumHitsLayer, 0, sizeof(m_iNumHitsLayer));
 
    memset(&m_fhits, 0, sizeof(m_fhits));
    std::fill_n(m_fhits, sizeof(m_fhits)/sizeof(Int_t), -9999);
 
    m_iNumU = 0;
    m_iNumV = 0;
    m_iRPot = 0;
    m_iUVCut = 0;
 
    ATH_MSG_DEBUG("end ALFA_HalfReco::ALFA_HalfReco");
}
 
ALFA_HalfReco::~ALFA_HalfReco()
{
}
 
StatusCode ALFA_HalfReco::Initialize(Float_t faMD[RPOTSCNT][ALFALAYERSCNT*ALFAPLATESCNT][ALFAFIBERSCNT], Float_t fbMD[RPOTSCNT][ALFALAYERSCNT*ALFAPLATESCNT][ALFAFIBERSCNT], Int_t iHalf, Int_t fMultiplicityCut, Int_t iUVCut, Float_t fOverlapCut)
{
    ATH_MSG_DEBUG("begin ALFA_HalfReco::Initialize()");
 
    m_iMultiplicityCut = fMultiplicityCut;
    m_iUVCut = iUVCut;
    m_fOverlapCut = fOverlapCut;
    m_iHalf = iHalf;
 
    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_HalfReco::Initialize()");
 
    return StatusCode::SUCCESS;
}
 
StatusCode ALFA_HalfReco::Execute(Int_t iRPot, const std::list<MDHIT> &ListMDHits)
{
    ATH_MSG_DEBUG("ALFA_HalfReco::Execute()");
 
    FIBERS structFibers;
    Int_t iNumUFiberHits = 0;        //u_hits, v_hits (a condition for the UVCut 3)
    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 i=half_ch*10;i<half_ch*10+10;i++)
    for (Int_t i=ALFAPLATESCNT*m_iHalf; i<m_iHalf*ALFAPLATESCNT+ALFAPLATESCNT; i++)
    {
//      if (m_iNumHitsLayer[i] <= m_iMultiplicityCut && m_iNumHitsLayer[i] > 0)
        if ((Int_t)m_MapLayers[i].ListFibers.size()<=m_iMultiplicityCut && (Int_t)m_MapLayers[i].ListFibers.size()>0)
        {
            if (fmod(double(i),double(2)) == 1) iNumUFiberHits++;
            else iNumVFiberHits++;
        }
    }
 
 
    // RECONSTRUCTION
    m_fRecXPos = -9999.0;
    m_fRecYPos = -9999.0;
    m_fOvU     = -9999.0;
    m_fOvV      = -9999.0;
 
    memset(&m_fhits, 0, sizeof(m_fhits));
    std::fill_n(m_fhits, sizeof(m_fhits)/sizeof(Int_t), -9999);
 
    if (iNumUFiberHits>=m_iUVCut && iNumVFiberHits>=m_iUVCut) OverLap();
 
    ATH_MSG_DEBUG("end ALFA_HalfReco::Execute()");
    return StatusCode::SUCCESS;
}
 
StatusCode ALFA_HalfReco::Finalize(Float_t &fRecXPos, Float_t &fRecYPos)
{
    ATH_MSG_DEBUG("begin ALFA_HalfReco::Finalize()");
 
    fRecXPos = m_fRecXPos;
    fRecYPos = m_fRecYPos;
 
    ATH_MSG_DEBUG("end ALFA_HalfReco::Execute()");
    return StatusCode::SUCCESS;
}
 
void ALFA_HalfReco::HistFill(Float_t &b_p, Float_t &b_n, Float_t &Ov_p, Float_t &Ov_n, Int_t &NumU, Int_t &NumV, Int_t iFlag)
{
    ATH_MSG_DEBUG("ALFA_HalfReco::HistFill()");
 
    Int_t iHit;
    Float_t fFibCen;
    Float_t b_ref[2] = {-127.0, -127.0};
    Float_t fXInter, fYInter;
    Float_t p_min, p_max;
    Float_t n_min, n_max;
    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
    {
        b_ref[0]=-127.0;
        b_ref[1]=-127.0;
    }
 
    if (iFlag==1) //Event reconstructed for U but not for V so let's try to refine
    {
        b_ref[0]=b_p;
        b_ref[1]=-127.0;
 
    }
 
    if (iFlag==2) //Event reconstructed for V but not for U so let's try to refine
    {
        b_ref[0]=-127.0;
        b_ref[1]=b_n;
    }
 
    if (iFlag==3) //Event reconstructed for U and V, ultime refinement
    {
        b_ref[0]=b_p;
        b_ref[1]=b_n;
    }
 
    for (Int_t i=0;i<72000;i++)
    {
        Over_p[i]=0;
        Over_n[i]=0;
    }
 
    std::list<int>::iterator intIter;
//for(Int_t i=half_ch*10;i<half_ch*10+10;i++)
    for (Int_t iLayer = ALFAPLATESCNT*m_iHalf; iLayer < m_iHalf*ALFAPLATESCNT+ALFAPLATESCNT; iLayer++)
    {
        for (intIter=m_MapLayers[iLayer].ListFibers.begin(); intIter!=m_MapLayers[iLayer].ListFibers.end(); ++intIter)
        {
            iHit = *intIter;
 
            if (m_faMD[m_iRPot][iLayer][iHit] >= 0)
            {
                fXInter = (b_ref[1]-m_fbMD[m_iRPot][iLayer][iHit])/(1+m_faMD[m_iRPot][iLayer][iHit]);
                fYInter = (m_faMD[m_iRPot][iLayer][iHit]*b_ref[1]+m_fbMD[m_iRPot][iLayer][iHit])/(1+m_faMD[m_iRPot][iLayer][iHit])-b_ref[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]-b_ref[0])/(1-m_faMD[m_iRPot][iLayer][iHit]);
                fYInter = (m_fbMD[m_iRPot][iLayer][iHit]-m_faMD[m_iRPot][iLayer][iHit]*b_ref[0])/(1-m_faMD[m_iRPot][iLayer][iHit])-b_ref[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
    NumU=0;
    NumV=0;
 
    std::vector<int> *max_p = new std::vector<int>;
    std::vector<int> *max_n = new std::vector<int>;
 
    for (Int_t i=0;i<72000;i++)
    {
        if (Over_p[i]>NumU) NumU = Over_p[i];
        if (Over_n[i]>NumV) NumV = Over_n[i];
    }
 
    if (NumU >= m_iUVCut) // If more than m_iUVCut fibers in the maximum we do the reconstruction
    {
        for (Int_t i=0;i<72000;i++)
        {
            if (Over_p[i]==NumU)
            {
                max_p->push_back(i);
            }
        }
 
        p_min = -36.0 + double(max_p->front())*1e-3;
        p_max = -36.0 + double(max_p->back())*1e-3;
        iMinP_tmp = max_p->front();
        iMaxP_tmp = max_p->back();
 
//      Making sure that the plateau belongs to the same track
        iFullWidth = max_p->size();
 
        for (Int_t i=0; i<iFullWidth; i++)
        {
            if (max_p->at(iFullWidth-i-1)-iMinP_tmp < 500)
            {
                iMaxP_tmp = max_p->at(iFullWidth-i-1);
                p_max     = -36.0 + double(iMaxP_tmp)*1e-3;
                break;
            }
        }
 
        if ((p_max-p_min)<m_fOverlapCut) //Check for multiple tracks
        {
            b_p = b_ref[1]+(p_min+p_max)/sqrt(2.);
            Ov_p = p_max-p_min;
        }
        else
        {
            b_p = -9999.0;
            Ov_p = -9999.0;
        }
    }
    else
    {
        b_p = -9999.0;
        Ov_p = -9999.0;
    }
 
    if (NumV >= m_iUVCut) // If more than m_iUVCut fibers in the maximum we do the reconstruction
    {
        for (Int_t i=0;i<72000;i++)
        {
            if (Over_n[i]==NumV)
            {
                max_n->push_back(i);
            }
        }
 
        n_min = -36.0 + double(max_n->front())*1e-3;
        n_max = -36.0 + double(max_n->back())*1e-3;
        iMinN_tmp = max_n->front();
        iMaxN_tmp = max_n->back();
 
//      Making sure that the plateau belongs to the same track
        iFullWidth = max_n->size();
 
        for (Int_t i=0; i<iFullWidth; i++)
        {
            if (max_n->at(iFullWidth-i-1)-iMinN_tmp < 500)
            {
                iMaxN_tmp = max_n->at(iFullWidth-i-1);
                n_max     = -36.0 + double(iMaxN_tmp)*1e-3;
                break;
            }
        }
 
        if ((n_max-n_min)<m_fOverlapCut) //Check for multiple tracks
        {
            b_n = b_ref[0]+(n_min+n_max)/sqrt(2.);
            Ov_n = n_max-n_min;
        }
        else
        {
            b_n = -9999.0;
            Ov_n = -9999.0;
        }
    }
    else
    {
        b_n = -9999.0;
        Ov_n = -9999.0;
    }
 
    delete max_p;
    delete max_n;
 
    ATH_MSG_DEBUG("endl ALFA_HalfReco::HistFill()");
}
 
void ALFA_HalfReco::OverLap()
{
    ATH_MSG_DEBUG("ALFA_HalfReco::OverLap()");
 
    Float_t b_mean_n=-9999.0;
    Float_t b_mean_p=-9999.0;
    Float_t overReg_p;
    Float_t overReg_n;
    Int_t NumU, NumV;
 
    //First call, projection on middle fiber for U and V
    HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 0);
 
    //If first projection worked, we do the ultimate one
    if (b_mean_p!=-9999.0 && b_mean_n!=-9999.0)
    {
        HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 3);
        if (b_mean_p!=-9999.0 && b_mean_n!=-9999.0) HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 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 (b_mean_p!=-9999.0 && b_mean_n==-9999.0)
        {
            HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 1);
 
            if (b_mean_p!=-9999.0 && b_mean_n!=-9999.0)
            {
                //if it as worked for both we do the ultimate one
                HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 3);
                if (b_mean_p!=-9999.0 && b_mean_n!=-9999.0) HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 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 (b_mean_p==-9999.0 && b_mean_n!=-9999.0)
        {
            HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 2);
 
            if (b_mean_p!=-9999.0 && b_mean_n!=-9999.0)
            {
                //if it as worked for both we do the ultimate one
                HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 3);
                if (b_mean_p!=-9999.0 && b_mean_n!=-9999.0) HistFill(b_mean_p, b_mean_n, overReg_p, overReg_n, NumU, NumV, 3);
            }
        }
    }
 
    Float_t x_tmp, y_tmp;
    Float_t min_x,min_y;
    Float_t dist_x,dist_y;
//  Float_t dist_min_x,dist_min_y;
    Int_t gFib_x, gFib_y;
    Int_t iHit;
 
    Float_t OL_U, OL_V;
 
    std::list<int>::iterator intIter;
    if (b_mean_p!=-9999.0 && b_mean_n!=-9999.0)
    {
        m_fRecXPos = (b_mean_n-b_mean_p)/2.0;
        m_fRecYPos = (b_mean_n+b_mean_p)/2.0;
        OL_U = overReg_p;
        OL_V = overReg_n;
 
        //for (Int_t i=half_ch*10;i<half_ch*10+10;i++)
        for (Int_t iLayer = ALFAPLATESCNT*m_iHalf; iLayer<m_iHalf*ALFAPLATESCNT+ALFAPLATESCNT; iLayer++)
        {
            min_x = 0.24/cos(TMath::Pi()/4.);
            min_y = 0.24/cos(TMath::Pi()/4.);
 
            gFib_x = 9999;
            gFib_y = 9999;
 
            for (intIter=m_MapLayers[iLayer].ListFibers.begin(); intIter!=m_MapLayers[iLayer].ListFibers.end(); ++intIter)
            {
                iHit = *intIter;
                x_tmp = (m_fRecYPos-m_fbMD[m_iRPot][iLayer][iHit])/m_faMD[m_iRPot][iLayer][iHit];
                y_tmp = m_faMD[m_iRPot][iLayer][iHit]*m_fRecXPos+m_fbMD[m_iRPot][iLayer][iHit];
                dist_x = TMath::Abs(m_fRecXPos-x_tmp);
                dist_y = TMath::Abs(m_fRecYPos-y_tmp);
 
                if (dist_x <= min_x)
                {
//                  dist_min_x = m_fRecXPos-x_tmp;
                    min_x = dist_x;
                    gFib_x = iHit;
                }
 
                if (dist_y <= min_y)
                {
//                  dist_min_y = m_fRecYPos-y_tmp;
                    min_y = dist_y;
                    gFib_y = iHit;
                }
            }
 
            if (gFib_x==gFib_y) m_fhits[iLayer]=gFib_x;
        }
    }
    else
    {
        m_fRecXPos = -9999.0;
        m_fRecYPos = -9999.0;
        NumU = 0;
        NumV = 0;
        OL_U = -9999.0;
        OL_V = -9999.0;
    }
 
    SetData(NumU, NumV, OL_U, OL_V);
 
    ATH_MSG_DEBUG("end ALFA_HalfReco::OverLap()");
}
 
void ALFA_HalfReco::SetData(Int_t iNumU, Int_t iNumV, Float_t fOvU, Float_t fOvV)
{
    ATH_MSG_DEBUG("begin ALFA_HalfReco::SetData()");
 
    m_iNumU = iNumU;
    m_iNumV = iNumV;
    m_fOvU = fOvU;
    m_fOvV = fOvV;
 
    ATH_MSG_DEBUG("end ALFA_HalfReco::SetData()");
}
 
void ALFA_HalfReco::GetData(Int_t &iNumU, Int_t &iNumV, Float_t &fOvU, Float_t &fOvV, Int_t (&iFibSel)[ALFALAYERSCNT*ALFAPLATESCNT])
{
    ATH_MSG_DEBUG("begin ALFA_HalfReco::GetData()");
 
    iNumU = m_iNumU;
    iNumV = m_iNumV;
    fOvU = m_fOvU;
    fOvV = m_fOvV;
 
    for (Int_t iLayer=0; iLayer<ALFALAYERSCNT*ALFAPLATESCNT; iLayer++)
    {
        iFibSel[iLayer] = m_fhits[iLayer];
    }
 
    ATH_MSG_DEBUG("end ALFA_HalfReco::GetData()");
}