BmnSiBTModule.cxx

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#include "BmnSiBTModule.h"
 
#include "TF1.h"
#include "TH1F.h"
#include "TMath.h"
#include "TRandom.h"
 
#include <fstream>
 
BmnSiBTModule::BmnSiBTModule()
{
 
    Verbosity = true;
 
    ZStartModulePosition = 0.0;
 
    ModuleThickness = 0.03;   // cm
 
    XMinModule = 0.0;
    XMaxModule = 0.0;
    YMinModule = 0.0;
    YMaxModule = 0.0;
}
 
BmnSiBTModule::BmnSiBTModule(Double_t z_start_pos, Double_t module_thick)
{
 
    Verbosity = true;
 
    ZStartModulePosition = z_start_pos;
 
    ModuleThickness = module_thick;   // cm
 
    XMinModule = 0.0;
    XMaxModule = 0.0;
    YMinModule = 0.0;
    YMaxModule = 0.0;
}
 
BmnSiBTModule::~BmnSiBTModule() {}
 
Double_t BmnSiBTModule::GetZPositionRegistered()
{
 
    return ZStartModulePosition + ModuleThickness * 0.5;
}
 
void BmnSiBTModule::AddStripLayer(BmnSiBTLayer strip_layer)
{
    StripLayers.push_back(strip_layer);
 
    DefineModuleBorders();
}
 
Bool_t BmnSiBTModule::SetStripSignalInLayer(Int_t layer_num, Int_t strip_num, Double_t signal)
{
    if (layer_num >= 0 && layer_num < (Int_t)StripLayers.size())
        return StripLayers[layer_num].SetStripSignal(strip_num, signal);
 
    return false;
}
 
Bool_t BmnSiBTModule::AddStripSignalInLayer(Int_t layer_num, Int_t strip_num, Double_t signal)
{
    if (layer_num >= 0 && layer_num < (Int_t)StripLayers.size())
        return StripLayers[layer_num].AddStripSignal(strip_num, signal);
 
    return false;
}
 
Bool_t BmnSiBTModule::SetStripMatchInLayer(Int_t layer_num, Int_t strip_num, BmnMatch strip_match)
{
    if (layer_num >= 0 && layer_num < (Int_t)StripLayers.size())
        return StripLayers[layer_num].SetStripMatch(strip_num, strip_match);
 
    return false;
}
 
Double_t BmnSiBTModule::GetStripSignalInLayer(Int_t layer_num, Int_t strip_num)
{
    if (layer_num >= 0 && layer_num < (Int_t)StripLayers.size())
        return StripLayers[layer_num].GetStripSignal(strip_num);
 
    return -1;
}
 
BmnMatch BmnSiBTModule::GetStripMatchInLayer(Int_t layer_num, Int_t strip_num)
{
    if (layer_num >= 0 && layer_num < (Int_t)StripLayers.size())
        return StripLayers[layer_num].GetStripMatch(strip_num);
 
    return BmnMatch();
}
 
void BmnSiBTModule::ResetModuleData()
{
    for (size_t ilayer = 0; ilayer < StripLayers.size(); ++ilayer) {
        StripLayers[ilayer].ResetLayer();
    }
 
    DefineModuleBorders();
 
    ResetRealPoints();
    ResetIntersectionPoints();
}
 
Bool_t BmnSiBTModule::IsPointInsideModule(Double_t x, Double_t y)
{
    for (size_t ilayer = 0; ilayer < StripLayers.size(); ++ilayer) {
        if (StripLayers[ilayer].IsPointInsideStripLayer(x, y))
            return true;
    }
    return false;
}
 
Bool_t BmnSiBTModule::IsPointInsideModule(Double_t x, Double_t y, Double_t z)
{
    Double_t coord_eps = 0.01;   // 100 um
    if (((z > ZStartModulePosition) || (fabs(z - ZStartModulePosition) < coord_eps))
        && ((z < (ZStartModulePosition + ModuleThickness))
            || (fabs(z - (ZStartModulePosition + ModuleThickness))) < coord_eps))
    {
        if (IsPointInsideModule(x, y))
            return true;
    }
    return false;
}
 
Bool_t BmnSiBTModule::IsPointInsideZThickness(Double_t z)
{
    Double_t coord_eps = 0.01;   // 100 um
    if (((z > ZStartModulePosition) || (fabs(z - ZStartModulePosition) < coord_eps))
        && ((z < (ZStartModulePosition + ModuleThickness))
            || (fabs(z - (ZStartModulePosition + ModuleThickness))) < coord_eps))
    {
        return true;
    }
    return false;
}
 
// Add single point with Gaussian smearing
Bool_t BmnSiBTModule::AddRealPointFullOne(Double_t x,
                                          Double_t y,
                                          Double_t z,
                                          Double_t px,
                                          Double_t py,
                                          Double_t pz,
                                          Double_t signal,
                                          Int_t refID)
{
 
    if (IsPointInsideModule(x, y)) {
 
        if (signal <= 0.0)
            signal = 1e-16;
 
        Double_t AvalancheRadius = 0.05;   // cm (avalanche is about 2-3 strips)
 
        Double_t radius = AvalancheRadius;
        if (radius <= 0.0)
            return false;
 
        Int_t cycle_cnt = 0;
        while (true) {
            radius = gRandom->Gaus(AvalancheRadius, 0.025);
            if (radius > AvalancheRadius / 2.0 && radius < AvalancheRadius * 2.0 && radius > 0.0)
                break;
            cycle_cnt++;
 
            if (cycle_cnt > 5) {
                radius = AvalancheRadius;
                break;
            }
        }
 
        // Make strip cluster in each strip layer -------------------------------
        Int_t n_strip_layers = StripLayers.size();
        vector<StripCluster> cluster_layers(n_strip_layers, StripCluster());
 
        for (Int_t ilayer = 0; ilayer < n_strip_layers; ++ilayer) {
            if (!StripLayers[ilayer].IsPointInsideStripLayer(x, y))
                continue;
            cluster_layers[ilayer] = MakeCluster(ilayer, x, y, signal, radius);
        }
        //----------------------------------------------------------------------
 
        // Add the correct clusters to the strip layers -------------------------
        for (Int_t ilayer = 0; ilayer < n_strip_layers; ++ilayer) {
            for (size_t ielement = 0; ielement < cluster_layers[ilayer].Strips.size(); ++ielement) {
                Int_t strip_num = cluster_layers[ilayer].Strips.at(ielement);
                Double_t strip_signal = cluster_layers[ilayer].Signals.at(ielement);
                StripLayers[ilayer].AddStripSignal(strip_num, strip_signal);
            }
        }
        //----------------------------------------------------------------------
 
        // Fill strip matches ---------------------------------------------------
        for (Int_t ilayer = 0; ilayer < n_strip_layers; ++ilayer) {
            for (size_t ielement = 0; ielement < cluster_layers[ilayer].Strips.size(); ++ielement) {
                Int_t strip_num = cluster_layers[ilayer].Strips.at(ielement);
                Double_t strip_signal = cluster_layers[ilayer].Signals.at(ielement);
                StripLayers[ilayer].AddLinkToStripMatch(strip_num, strip_signal / cluster_layers[ilayer].TotalSignal,
                                                        refID);
            }
        }
        //----------------------------------------------------------------------
 
        RealPointsX.push_back(x);
        RealPointsY.push_back(y);
        RealPointsMC.push_back(refID);
 
        return true;
    } else {
        if (Verbosity)
            cerr << "WARNING: BmnSiBTModule::AddRealPointFullOne(): Point (" << x << " : " << y << " : " << z
                 << ") is out of the readout plane or inside a dead zone\n";
        return false;
    }
}
 
// Add single point without smearing and avalanch effects
Bool_t BmnSiBTModule::AddRealPointSimple(Double_t x,
                                         Double_t y,
                                         Double_t z,
                                         Double_t px,
                                         Double_t py,
                                         Double_t pz,
                                         Double_t signal,
                                         Int_t refID)
{
 
    if (IsPointInsideModule(x, y)) {
 
        Int_t n_strip_layers = StripLayers.size();
 
        // Add a signal to the strips layers ------------------------------------
        for (Int_t ilayer = 0; ilayer < n_strip_layers; ++ilayer) {
 
            if (!StripLayers[ilayer].IsPointInsideStripLayer(x, y))
                continue;
 
            Double_t strip_pos = StripLayers[ilayer].ConvertPointToStripPosition(x, y);
            StripLayers[ilayer].AddStripSignal((Int_t)strip_pos, signal);
 
            // strip match
            StripLayers[ilayer].AddLinkToStripMatch((Int_t)strip_pos, 1.0, refID);
        }
        //----------------------------------------------------------------------
 
        RealPointsX.push_back(x);
        RealPointsY.push_back(y);
        RealPointsMC.push_back(refID);
 
        return true;
    } else {
        if (Verbosity)
            cerr << "WARNING: BmnSiBTModule::AddRealPointSimple(): Point (" << x << " : " << y
                 << ") is out of the readout plane or inside a dead zone\n";
        return false;
    }
}
 
StripCluster BmnSiBTModule::MakeCluster(Int_t layer_num,
                                        Double_t xcoord,
                                        Double_t ycoord,
                                        Double_t signal,
                                        Double_t radius)
{
 
    Double_t ClusterDistortion = 0.0;   // signal variation (0.1 is 10%)
 
    Double_t Gain = 1.0;
 
    StripCluster cluster;
 
    if (radius <= 0.0)
        return cluster;
 
    Double_t Pitch = StripLayers[layer_num].GetPitch();
 
    Double_t RadiusInZones = radius / Pitch;
    Double_t Sigma = RadiusInZones / 3.33;
 
    TF1 gausF("gausF", "gaus", -4 * Sigma, 4 * Sigma);
    gausF.SetParameter(0, 1.0);     // constant (altitude)
    gausF.SetParameter(1, 0.0);     // mean (center position)
    gausF.SetParameter(2, Sigma);   // sigma
 
    Double_t SCluster = gausF.Integral(-4 * Sigma, 4 * Sigma);   // square of the one side distribution (more exactly)
 
    TRandom rand(0);
    Double_t var_level = ClusterDistortion;   // signal variation (0.1 is 10%)
 
    Int_t NStripsInLayer = StripLayers[layer_num].GetNStrips();
 
    if (NStripsInLayer == 0)
        return cluster;
 
    Double_t CenterZonePos = StripLayers[layer_num].ConvertPointToStripPosition(xcoord, ycoord);
 
    if (CenterZonePos < 0.0 || CenterZonePos >= NStripsInLayer)
        return cluster;
 
    gausF.SetParameter(1, CenterZonePos);
    Double_t total_signal = 0.0;
 
    Double_t LeftZonePos = CenterZonePos - RadiusInZones;
    Double_t RightZonePos = CenterZonePos + RadiusInZones;
    Double_t OutLeftBorder = 0.0;
    Double_t OutRightBorder = 0.0;
 
    if (LeftZonePos < 0.0) {
        OutLeftBorder = LeftZonePos;
        LeftZonePos = 0.0;
    }
    if (RightZonePos < 0.0) {
        OutRightBorder = RightZonePos;
        RightZonePos = 0.0;
    }
    if (LeftZonePos >= NStripsInLayer) {
        OutLeftBorder = LeftZonePos;
        LeftZonePos = NStripsInLayer - 0.001;
    }
    if (RightZonePos >= NStripsInLayer) {
        OutRightBorder = RightZonePos;
        RightZonePos = NStripsInLayer - 0.001;
    }
 
    Double_t h = 0.0;
    Double_t dist = 0.0;
 
    // avalanche is inside of the one strip
    if ((Int_t)LeftZonePos == (Int_t)RightZonePos) {
 
        Int_t NumCurrentZone = (Int_t)LeftZonePos;
 
        h = RightZonePos - LeftZonePos;
        if (h < 0.0)
            h = 0.0;
 
        Double_t xp = LeftZonePos + dist;
        Double_t S = gausF.Integral(xp, xp + h);
        Double_t Energy = (signal * Gain) * (S / SCluster);
        Energy += rand.Gaus(0.0, var_level * Energy);
        if (Energy < 0.0)
            Energy = 0.0;
 
        if (NumCurrentZone >= 0 && NumCurrentZone < NStripsInLayer && Energy > 0.0) {
            cluster.AddStrip(NumCurrentZone, Energy);
            total_signal += Energy;
        }
 
        dist += h;
 
    } else {
        // left border strip
        Int_t NumCurrentZone = (Int_t)LeftZonePos;
 
        h = ((Int_t)LeftZonePos + 1) - LeftZonePos;
        if (h < 0.0)
            h = 0.0;
 
        Double_t xp = LeftZonePos + dist;
        Double_t S = gausF.Integral(xp, xp + h);
        Double_t Energy = (signal * Gain) * (S / SCluster);
        Energy += rand.Gaus(0.0, var_level * Energy);
        if (Energy < 0.0)
            Energy = 0.0;
 
        if (NumCurrentZone >= 0 && NumCurrentZone < NStripsInLayer && Energy > 0.0) {
            cluster.AddStrip(NumCurrentZone, Energy);
            total_signal += Energy;
        }
 
        dist += h;
 
        // inner strips
        for (Int_t i = (Int_t)LeftZonePos + 1; i < (Int_t)RightZonePos; ++i) {
 
            NumCurrentZone = i;
 
            h = 1.0;
 
            xp = LeftZonePos + dist;
            S = gausF.Integral(xp, xp + h);
            Energy = (signal * Gain) * (S / SCluster);
            Energy += rand.Gaus(0.0, var_level * Energy);
            if (Energy < 0.0)
                Energy = 0.0;
 
            if (NumCurrentZone >= 0 && NumCurrentZone < NStripsInLayer && Energy > 0.0) {
                cluster.AddStrip(NumCurrentZone, Energy);
                total_signal += Energy;
            }
 
            dist += h;
        }
        // right border strip
        NumCurrentZone = (Int_t)RightZonePos;
 
        h = RightZonePos - (Int_t)RightZonePos;
        if (h < 0.0)
            h = 0.0;
 
        xp = LeftZonePos + dist;
        S = gausF.Integral(xp, xp + h);
        Energy = (signal * Gain) * (S / SCluster);
        Energy += rand.Gaus(0.0, var_level * Energy);
        if (Energy < 0.0)
            Energy = 0.0;
 
        if (NumCurrentZone >= 0 && NumCurrentZone < NStripsInLayer && Energy > 0.0) {
            cluster.AddStrip(NumCurrentZone, Energy);
            total_signal += Energy;
        }
 
        dist += h;
    }
 
    if (cluster.GetClusterSize() <= 0) {
        return cluster;
    }
 
    // find the mean value of the avalanche position (fitting by gaus function)
    Double_t mean_fit_pos = 0.0;
 
    Int_t NOutLeftBins = 0;
    Int_t NOutRightBins = 0;
    if (OutLeftBorder != 0.0) {
        NOutLeftBins = (Int_t)(fabs(OutLeftBorder)) + 1;
    }
    if (OutRightBorder != 0.0) {
        NOutRightBins = (Int_t)(OutRightBorder - RightZonePos) + 1;
    }
 
    Int_t begin_strip_num = cluster.Strips.at(0);
    Int_t last_strip_num = cluster.Strips.at(cluster.GetClusterSize() - 1);
    Int_t nstrips = last_strip_num - begin_strip_num + 1;
 
    TH1F hist("hist_for_fit", "hist_for_fit", nstrips + NOutLeftBins + NOutRightBins, begin_strip_num - NOutLeftBins,
              last_strip_num + 1 + NOutRightBins);
    Int_t hist_index = 0;
 
    for (Int_t i = 0; i < cluster.GetClusterSize(); ++i) {
        Double_t value = cluster.Signals.at(i);
        hist.SetBinContent(hist_index + 1 + NOutLeftBins, value);
        hist_index++;
    }
 
    // on the left border
    if (NOutLeftBins > 0.0) {
        Double_t first = OutLeftBorder;
        Double_t last = (Int_t)OutLeftBorder;
        Double_t S = gausF.Integral(first, last);
        Double_t Energy = (signal * Gain) * (S / SCluster);
        Energy += rand.Gaus(0.0, var_level * Energy);
        if (Energy < 0.0)
            Energy = 0.0;
        Double_t value = Energy;
        hist.SetBinContent(1, value);
        dist = 0.0;
 
        for (Int_t i = 1; i < NOutLeftBins; ++i) {
            h = 1.0;
            first = (Int_t)OutLeftBorder + dist;
            last = first + h;
            S = gausF.Integral(first, last);
            Energy = (signal * Gain) * (S / SCluster);
            Energy += rand.Gaus(0.0, var_level * Energy);
            if (Energy < 0.0)
                Energy = 0.0;
            value = Energy;
            hist.SetBinContent(1 + i, value);
            dist += h;
        }
    }
 
    // on the right border
    if (NOutRightBins > 0.0) {
        dist = 0.0;
        for (Int_t i = hist_index; i < hist_index + NOutRightBins - 1; ++i) {
            h = 1.0;
            Double_t first = NStripsInLayer + dist;
            Double_t last = first + h;
            Double_t S = gausF.Integral(first, last);
            Double_t Energy = (signal * Gain) * (S / SCluster);
            Energy += rand.Gaus(0.0, var_level * Energy);
            if (Energy < 0.0)
                Energy = 0.0;
            Double_t value = Energy;
            hist.SetBinContent(1 + i, value);
            dist += h;
        }
 
        Double_t first = (Int_t)OutRightBorder;
        Double_t last = first + (OutRightBorder - (Int_t)OutRightBorder);
        Double_t S = gausF.Integral(first, last);
        Double_t Energy = (signal * Gain) * (S / SCluster);
        Energy += rand.Gaus(0.0, var_level * Energy);
        if (Energy < 0.0)
            Energy = 0.0;
        Double_t value = Energy;
        hist.SetBinContent(hist_index + NOutRightBins, value);
    }
 
    TF1* gausFitFunction = 0;
    TString fit_params = "WQ0";
 
#ifdef DRAW_REAL_CLUSTER_HISTOGRAMS
    fit_params = "WQ";
#endif
 
    if (nstrips > 1) {
        hist.Fit("gaus", fit_params);   // Q - quit mode (without information on the screen); 0 - not draw
        gausFitFunction = hist.GetFunction("gaus");
        if (gausFitFunction) {
            mean_fit_pos = gausFitFunction->GetParameter(1);
        } else {
            mean_fit_pos = hist.GetMean();
        }
    } else {
        mean_fit_pos = hist.GetMean();
    }
 
    cluster.MeanPosition = mean_fit_pos;
    cluster.TotalSignal = total_signal;
    cluster.PositionResidual = mean_fit_pos - CenterZonePos;   // residual between mean and origin positions (lower
                                                               // cluster): residual = finded(current) - orig(average)
 
    cluster.IsCorrect = true;   // set correct status of the cluster
    return cluster;
}
 
void BmnSiBTModule::CalculateStripHitIntersectionPoints()
{
 
    ResetIntersectionPoints();
 
    Int_t n_strip_layers = StripLayers.size();
 
    // Find strip clusters and hits in the strip layers -------------------------
    for (Int_t ilayer = 0; ilayer < n_strip_layers; ++ilayer) {
        StripLayers[ilayer].FindClustersAndStripHits();
    }
    //--------------------------------------------------------------------------
 
    for (Int_t ilayer = 0; ilayer < n_strip_layers; ++ilayer) {
 
        for (Int_t jlayer = ilayer + 1; jlayer < n_strip_layers; ++jlayer) {
            // cout << "(i-layer : j-layer) = ( " << ilayer << " : " << jlayer << " )\n";
 
            if (StripLayers[ilayer].GetType() == StripLayers[jlayer].GetType())
                continue;
 
            Double_t iAngleRad = StripLayers[ilayer].GetAngleRad();
            Double_t jAngleRad = StripLayers[jlayer].GetAngleRad();
 
            if (Abs(iAngleRad - jAngleRad) < 0.01)
                continue;
 
            Double_t i_PiOver2MinusAngleRad = PiOver2() - iAngleRad;
            Double_t j_PiOver2MinusAngleRad = PiOver2() - jAngleRad;
 
            for (Int_t i_strip_hit = 0; i_strip_hit < StripLayers[ilayer].GetNStripHits(); ++i_strip_hit) {
                for (Int_t j_strip_hit = 0; j_strip_hit < StripLayers[jlayer].GetNStripHits(); ++j_strip_hit) {
 
                    Double_t iStripHitPos = StripLayers[ilayer].GetStripHitPos(i_strip_hit);
                    Double_t jStripHitPos = StripLayers[jlayer].GetStripHitPos(j_strip_hit);
 
                    Double_t iStripHitError = StripLayers[ilayer].GetStripHitError(i_strip_hit);
                    Double_t jStripHitError = StripLayers[jlayer].GetStripHitError(j_strip_hit);
 
                    Double_t xcoord;
                    Double_t ycoord;
 
                    if (Abs(iAngleRad) >= 0.01 && Abs(jAngleRad) >= 0.01) {
 
                        Double_t iB = StripLayers[ilayer].CalculateStripEquationB(iStripHitPos);
                        Double_t jB = StripLayers[jlayer].CalculateStripEquationB(jStripHitPos);
 
                        xcoord = (jB - iB) / (Tan(i_PiOver2MinusAngleRad) - Tan(j_PiOver2MinusAngleRad));
                        ycoord = Tan(i_PiOver2MinusAngleRad) * xcoord + iB;
                    } else {
 
                        if (Abs(iAngleRad) < 0.01) {
 
                            if (StripLayers[ilayer].GetStripNumberingOrder() == LeftToRight) {
                                xcoord = StripLayers[ilayer].GetXLeftStripBorderPoint()
                                         + iStripHitPos * StripLayers[ilayer].GetPitch();
                            } else {
                                xcoord = StripLayers[ilayer].GetXRightStripBorderPoint()
                                         - iStripHitPos * StripLayers[ilayer].GetPitch();
                            }
 
                            Double_t jB = StripLayers[jlayer].CalculateStripEquationB(jStripHitPos);
                            ycoord = Tan(j_PiOver2MinusAngleRad) * xcoord + jB;
                        }
 
                        if (Abs(jAngleRad) < 0.01) {
 
                            if (StripLayers[jlayer].GetStripNumberingOrder() == LeftToRight) {
                                xcoord = StripLayers[jlayer].GetXLeftStripBorderPoint()
                                         + jStripHitPos * StripLayers[jlayer].GetPitch();
                            } else {
                                xcoord = StripLayers[jlayer].GetXRightStripBorderPoint()
                                         - jStripHitPos * StripLayers[jlayer].GetPitch();
                            }
 
                            Double_t iB = StripLayers[ilayer].CalculateStripEquationB(iStripHitPos);
                            ycoord = Tan(i_PiOver2MinusAngleRad) * xcoord + iB;
                        }
                    }
 
                    // check: a point belongs to both strip layers together
                    if (StripLayers[ilayer].IsPointInsideStripLayer(xcoord, ycoord)
                        && StripLayers[jlayer].IsPointInsideStripLayer(xcoord, ycoord))
                    {
 
                        IntersectionPointsX.push_back(xcoord);
                        IntersectionPointsY.push_back(ycoord);
 
                        // Intersection (x,y)-errors from the strip-errors ------
                        Double_t AngleIntersecRad = Abs(iAngleRad - jAngleRad);
 
                        // a rhomb zone is the intersection of the strip errors
                        Double_t RhombSide1 = (iStripHitError * StripLayers[ilayer].GetPitch()) / Sin(AngleIntersecRad);
                        Double_t RhombSide2 = (jStripHitError * StripLayers[jlayer].GetPitch()) / Sin(AngleIntersecRad);
 
                        // x-strip error
                        Double_t xerr1 = Sin(Abs(jAngleRad)) * RhombSide1;
                        Double_t xerr2 = Sin(Abs(iAngleRad)) * RhombSide2;
                        Double_t xcoord_err = xerr1 + xerr2;
 
                        // y-strip error
                        Double_t yerr1 = Cos(Abs(jAngleRad)) * RhombSide1;
                        Double_t yerr2 = Cos(Abs(iAngleRad)) * RhombSide2;
                        Double_t ycoord_err = yerr1 + yerr2;
 
                        IntersectionPointsXErrors.push_back(xcoord_err);
                        IntersectionPointsYErrors.push_back(ycoord_err);
                        //------------------------------------------------------
 
                        // intersection matching ----------------------------------------
                        BmnMatch iStripMatch = StripLayers[ilayer].GetStripMatch((Int_t)iStripHitPos);
                        BmnMatch jStripMatch = StripLayers[jlayer].GetStripMatch((Int_t)jStripHitPos);
 
                        BmnMatch intersection_match;
                        intersection_match.AddLink(iStripMatch);
                        intersection_match.AddLink(jStripMatch);
 
                        IntersectionPointMatches.push_back(intersection_match);
                        //--------------------------------------------------------------
 
                        // Additional information about the intersection ------------
                        // cluster size (number strips) in both strip layers for each intersection
                        Int_t iLayerClusterSize = StripLayers[ilayer].GetStripHitClusterSize(i_strip_hit);
                        Int_t jLayerClusterSize = StripLayers[jlayer].GetStripHitClusterSize(j_strip_hit);
 
                        // strip position in both strip layers for each intersection
                        Double_t iLayerStripPosition = StripLayers[ilayer].ConvertPointToStripPosition(xcoord, ycoord);
                        Double_t jLayerStripPosition = StripLayers[jlayer].ConvertPointToStripPosition(xcoord, ycoord);
 
                        IntersectionPoints_LowerLayerStripTotalSignal.push_back(
                            StripLayers[ilayer].GetStripHitTotalSignal(i_strip_hit));
                        IntersectionPoints_UpperLayerStripTotalSignal.push_back(
                            StripLayers[jlayer].GetStripHitTotalSignal(j_strip_hit));
 
                        if (StripLayers[ilayer].GetType() == LowerStripLayer) {
                            IntersectionPoints_LowerLayerClusterSize.push_back(iLayerClusterSize);
                            IntersectionPoints_UpperLayerClusterSize.push_back(jLayerClusterSize);
                            IntersectionPoints_LowerLayerStripPosition.push_back(iLayerStripPosition);
                            IntersectionPoints_UpperLayerStripPosition.push_back(jLayerStripPosition);
                        } else {
                            IntersectionPoints_LowerLayerClusterSize.push_back(jLayerClusterSize);
                            IntersectionPoints_UpperLayerClusterSize.push_back(iLayerClusterSize);
                            IntersectionPoints_LowerLayerStripPosition.push_back(jLayerStripPosition);
                            IntersectionPoints_UpperLayerStripPosition.push_back(iLayerStripPosition);
                        }
                        //------------------------------------------------------
                    }
                }
            }
        }
    }
}
 
// need for a separated test (find x,y intersection coords from strip positions)
Bool_t BmnSiBTModule::SearchIntersectionPoint(Double_t& x,
                                              Double_t& y,
                                              Double_t strip_pos_layerA,
                                              Double_t strip_pos_layerB,
                                              Int_t layerA_index,
                                              Int_t layerB_index)
{
 
    Int_t ilayer = layerA_index;
    Int_t jlayer = layerB_index;
 
    if (StripLayers[ilayer].GetType() == StripLayers[jlayer].GetType())
        return false;
 
    Double_t iAngleRad = StripLayers[ilayer].GetAngleRad();
    Double_t jAngleRad = StripLayers[jlayer].GetAngleRad();
 
    if (Abs(iAngleRad - jAngleRad) < 0.01)
        return false;
 
    Double_t i_PiOver2MinusAngleRad = PiOver2() - iAngleRad;
    Double_t j_PiOver2MinusAngleRad = PiOver2() - jAngleRad;
 
    Double_t iStripHitPos = strip_pos_layerA;
    Double_t jStripHitPos = strip_pos_layerB;
 
    Double_t xcoord;
    Double_t ycoord;
 
    if (Abs(iAngleRad) >= 0.01 && Abs(jAngleRad) >= 0.01) {
 
        Double_t iB = StripLayers[ilayer].CalculateStripEquationB(iStripHitPos);
        Double_t jB = StripLayers[jlayer].CalculateStripEquationB(jStripHitPos);
 
        xcoord = (jB - iB) / (Tan(i_PiOver2MinusAngleRad) - Tan(j_PiOver2MinusAngleRad));
        ycoord = Tan(i_PiOver2MinusAngleRad) * xcoord + iB;
    } else {
 
        if (Abs(iAngleRad) < 0.01) {
 
            if (StripLayers[ilayer].GetStripNumberingOrder() == LeftToRight) {
                xcoord = StripLayers[ilayer].GetXLeftStripBorderPoint() + iStripHitPos * StripLayers[ilayer].GetPitch();
            } else {
                xcoord =
                    StripLayers[ilayer].GetXRightStripBorderPoint() - iStripHitPos * StripLayers[ilayer].GetPitch();
            }
 
            Double_t jB = StripLayers[jlayer].CalculateStripEquationB(jStripHitPos);
            ycoord = Tan(j_PiOver2MinusAngleRad) * xcoord + jB;
        }
 
        if (Abs(jAngleRad) < 0.01) {
 
            if (StripLayers[jlayer].GetStripNumberingOrder() == LeftToRight) {
                xcoord = StripLayers[jlayer].GetXLeftStripBorderPoint() + jStripHitPos * StripLayers[jlayer].GetPitch();
            } else {
                xcoord =
                    StripLayers[jlayer].GetXRightStripBorderPoint() - jStripHitPos * StripLayers[jlayer].GetPitch();
            }
 
            Double_t iB = StripLayers[ilayer].CalculateStripEquationB(iStripHitPos);
            ycoord = Tan(i_PiOver2MinusAngleRad) * xcoord + iB;
        }
    }
 
    x = xcoord;
    y = ycoord;
 
    // check: a point belongs to both strip layers together
    if (StripLayers[ilayer].IsPointInsideStripLayer(xcoord, ycoord)
        && StripLayers[jlayer].IsPointInsideStripLayer(xcoord, ycoord))
    {
        return true;
    }
 
    return false;
}
 
void BmnSiBTModule::ResetIntersectionPoints()
{
    IntersectionPointsX.clear();
    IntersectionPointsY.clear();
    IntersectionPointsXErrors.clear();
    IntersectionPointsYErrors.clear();
    IntersectionPoints_LowerLayerClusterSize.clear();
    IntersectionPoints_UpperLayerClusterSize.clear();
    IntersectionPoints_LowerLayerStripPosition.clear();
    IntersectionPoints_UpperLayerStripPosition.clear();
    IntersectionPoints_LowerLayerStripTotalSignal.clear();
    IntersectionPoints_UpperLayerStripTotalSignal.clear();
    IntersectionPointMatches.clear();
}
 
void BmnSiBTModule::DefineModuleBorders()
{
 
    if (StripLayers.size() == 0)
        return;
 
    XMinModule = 1.0E+10;
    XMaxModule = -1.0E+10;
    YMinModule = 1.0E+10;
    YMaxModule = -1.0E+10;
 
    for (size_t ilayer = 0; ilayer < StripLayers.size(); ++ilayer) {
        if (StripLayers[ilayer].GetXMinLayer() < XMinModule)
            XMinModule = StripLayers[ilayer].GetXMinLayer();
        if (StripLayers[ilayer].GetXMaxLayer() > XMaxModule)
            XMaxModule = StripLayers[ilayer].GetXMaxLayer();
        if (StripLayers[ilayer].GetYMinLayer() < YMinModule)
            YMinModule = StripLayers[ilayer].GetYMinLayer();
        if (StripLayers[ilayer].GetYMaxLayer() > YMaxModule)
            YMaxModule = StripLayers[ilayer].GetYMaxLayer();
    }
    return;
}