--- /dev/null
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+/* $Id$ */
+
+//-----------------------------------------------------------------------------
+/// \class AliMUONClusterFinderPeakCOG
+///
+/// Clusterizer class based on simple peak finder
+///
+/// Pre-clustering is handled by AliMUONPreClusterFinder
+/// From a precluster a pixel array is built, and its local maxima are used
+/// to get pads and compute pad center of gravity.
+///
+/// \author Laurent Aphecetche (for the "new" C++ structure) and
+/// Alexander Zinchenko, JINR Dubna, for the hardcore of it ;-)
+//-----------------------------------------------------------------------------
+
+#include "AliMUONClusterFinderPeakCOG.h"
+#include "AliMUONCluster.h"
+#include "AliMUONPad.h"
+
+#include "AliMpPad.h"
+#include "AliMpVSegmentation.h"
+
+#include "AliLog.h"
+#include "AliRunLoader.h"
+//#include "AliCodeTimer.h"
+
+#include <Riostream.h>
+#include <TH2.h>
+//#include <TCanvas.h>
+#include <TMath.h>
+
+/// \cond CLASSIMP
+ClassImp(AliMUONClusterFinderPeakCOG)
+/// \endcond
+
+const Double_t AliMUONClusterFinderPeakCOG::fgkZeroSuppression = 6; // average zero suppression value
+//const Double_t AliMUONClusterFinderMLEM::fgkDistancePrecision = 1e-6; // (cm) used to check overlaps and so on
+const Double_t AliMUONClusterFinderPeakCOG::fgkDistancePrecision = 1e-3; // (cm) used to check overlaps and so on
+const TVector2 AliMUONClusterFinderPeakCOG::fgkIncreaseSize(-AliMUONClusterFinderPeakCOG::fgkDistancePrecision,-AliMUONClusterFinderPeakCOG::fgkDistancePrecision);
+const TVector2 AliMUONClusterFinderPeakCOG::fgkDecreaseSize(AliMUONClusterFinderPeakCOG::fgkDistancePrecision,AliMUONClusterFinderPeakCOG::fgkDistancePrecision);
+
+// Status flags for pads
+const Int_t AliMUONClusterFinderPeakCOG::fgkZero = 0x0; ///< pad "basic" state
+const Int_t AliMUONClusterFinderPeakCOG::fgkMustKeep = 0x1; ///< do not kill (for pixels)
+const Int_t AliMUONClusterFinderPeakCOG::fgkUseForFit = 0x10; ///< should be used for fit
+const Int_t AliMUONClusterFinderPeakCOG::fgkOver = 0x100; ///< processing is over
+const Int_t AliMUONClusterFinderPeakCOG::fgkModified = 0x1000; ///< modified pad charge
+const Int_t AliMUONClusterFinderPeakCOG::fgkCoupled = 0x10000; ///< coupled pad
+
+//_____________________________________________________________________________
+AliMUONClusterFinderPeakCOG::AliMUONClusterFinderPeakCOG(Bool_t plot, AliMUONVClusterFinder* clusterFinder)
+ : AliMUONVClusterFinder(),
+fPreClusterFinder(clusterFinder),
+fPreCluster(0x0),
+fClusterList(),
+fEventNumber(0),
+fDetElemId(-1),
+fClusterNumber(0),
+fHistAnode(0x0),
+fPixArray(new TObjArray(20)),
+fDebug(0),
+fPlot(plot),
+fNClusters(0),
+fNAddVirtualPads(0)
+{
+ /// Constructor
+
+ fSegmentation[1] = fSegmentation[0] = 0x0;
+
+ if (fPlot) fDebug = 1;
+}
+
+//_____________________________________________________________________________
+AliMUONClusterFinderPeakCOG::~AliMUONClusterFinderPeakCOG()
+{
+/// Destructor
+ delete fPixArray; fPixArray = 0;
+ delete fPreClusterFinder;
+ AliInfo(Form("Total clusters %d AddVirtualPad needed %d",
+ fNClusters,fNAddVirtualPads));
+}
+
+//_____________________________________________________________________________
+Bool_t
+AliMUONClusterFinderPeakCOG::Prepare(Int_t detElemId, TClonesArray* pads[2],
+ const AliMpArea& area, const AliMpVSegmentation* seg[2])
+{
+ /// Prepare for clustering
+// AliCodeTimerAuto("")
+
+ for ( Int_t i = 0; i < 2; ++i )
+ {
+ fSegmentation[i] = seg[i];
+ }
+
+ // Find out the DetElemId
+ fDetElemId = detElemId;
+
+ // find out current event number, and reset the cluster number
+ fEventNumber = AliRunLoader::GetRunLoader()->GetEventNumber();
+ fClusterNumber = -1;
+ fClusterList.Delete();
+
+ AliDebug(3,Form("EVT %d DE %d",fEventNumber,fDetElemId));
+
+ if ( fPreClusterFinder->NeedSegmentation() )
+ {
+ return fPreClusterFinder->Prepare(detElemId,pads,area,seg);
+ }
+ else
+ {
+ return fPreClusterFinder->Prepare(detElemId,pads,area);
+ }
+}
+
+//_____________________________________________________________________________
+AliMUONCluster*
+AliMUONClusterFinderPeakCOG::NextCluster()
+{
+ /// Return next cluster
+// AliCodeTimerAuto("")
+
+ // if the list of clusters is not void, pick one from there
+ TObject* o = fClusterList.At(++fClusterNumber);
+ if ( o != 0x0 ) return static_cast<AliMUONCluster*>(o);
+
+ //FIXME : at this point, must check whether we've used all the digits
+ //from precluster : if not, let the preclustering know about those unused
+ //digits, so it can reuse them
+
+ // if the cluster list is exhausted, we need to go to the next
+ // pre-cluster and treat it
+
+ fPreCluster = fPreClusterFinder->NextCluster();
+
+ if (!fPreCluster)
+ {
+ // we are done
+ return 0x0;
+ }
+
+ fClusterList.Delete(); // reset the list of clusters for this pre-cluster
+ fClusterNumber = -1;
+
+ WorkOnPreCluster();
+
+ // WorkOnPreCluster may have used only part of the pads, so we check that
+ // now, and let the unused pads be reused by the preclustering...
+
+ Int_t mult = fPreCluster->Multiplicity();
+ for ( Int_t i = 0; i < mult; ++i )
+ {
+ AliMUONPad* pad = fPreCluster->Pad(i);
+ if ( !pad->IsUsed() )
+ {
+ fPreClusterFinder->UsePad(*pad);
+ }
+ }
+
+ return NextCluster();
+}
+
+//_____________________________________________________________________________
+Bool_t
+AliMUONClusterFinderPeakCOG::WorkOnPreCluster()
+{
+ /// Starting from a precluster, builds a pixel array, and then
+ /// extract clusters from this array
+
+ // AliCodeTimerAuto("")
+
+ if (fDebug) {
+ cout << " *** Event # " << AliRunLoader::GetRunLoader()->GetEventNumber()
+ << " det. elem.: " << fDetElemId << endl;
+ for (Int_t j = 0; j < fPreCluster->Multiplicity(); ++j) {
+ AliMUONPad* pad = fPreCluster->Pad(j);
+ printf(" bbb %3d %1d %8.4f %8.4f %8.4f %8.4f %6.1f %3d %3d %2d %1d %1d \n",
+ j, pad->Cathode(), pad->Coord(0), pad->Coord(1), pad->DX()*2, pad->DY()*2,
+ pad->Charge(), pad->Ix(), pad->Iy(), pad->Status(), pad->IsReal(), pad->IsSaturated());
+ }
+ }
+
+ AliMUONCluster* cluster = CheckPrecluster(*fPreCluster);
+ if (!cluster) return kFALSE;
+
+ BuildPixArray(*cluster);
+
+ if ( fPixArray->GetLast() < 0 )
+ {
+ AliDebug(1,"No pixel for the above cluster");
+ delete cluster;
+ return kFALSE;
+ }
+
+ Int_t nMax = 1, localMax[100], maxPos[100] = {0};
+ Double_t maxVal[100];
+
+ nMax = FindLocalMaxima(fPixArray, localMax, maxVal); // find local maxima
+
+ if (nMax > 1) TMath::Sort(nMax, maxVal, maxPos, kTRUE); // in descending order
+
+ for (Int_t i = 0; i < nMax; ++i)
+ {
+ FindCluster(*cluster,localMax, maxPos[i]);
+ }
+
+ delete cluster;
+ if (fPlot == 0) {
+ delete fHistAnode;
+ fHistAnode = 0x0;
+ }
+ return kTRUE;
+}
+
+//_____________________________________________________________________________
+Bool_t
+AliMUONClusterFinderPeakCOG::Overlap(const AliMUONPad& pad, const AliMUONPad& pixel)
+{
+ /// Check if the pad and the pixel overlaps
+
+ // make a fake pad from the pixel
+ AliMUONPad tmp(pad.DetElemId(),pad.Cathode(),pad.Ix(),pad.Iy(),
+ pixel.Coord(0),pixel.Coord(1),
+ pixel.Size(0),pixel.Size(1),0);
+
+ return AliMUONPad::AreOverlapping(pad,tmp,fgkDecreaseSize);
+}
+
+//_____________________________________________________________________________
+AliMUONCluster*
+AliMUONClusterFinderPeakCOG::CheckPrecluster(const AliMUONCluster& origCluster)
+{
+ /// Check precluster in order to attempt to simplify it (mostly for
+ /// two-cathode preclusters)
+
+ // AliCodeTimerAuto("")
+
+ // Disregard small clusters (leftovers from splitting or noise)
+ if ((origCluster.Multiplicity()==1 || origCluster.Multiplicity()==2) &&
+ origCluster.Charge(0)+origCluster.Charge(1) < 10)
+ {
+ return 0x0;
+ }
+
+ AliMUONCluster* cluster = new AliMUONCluster(origCluster);
+
+ AliDebug(2,"Start of CheckPreCluster=");
+ //StdoutToAliDebug(2,cluster->Print("full"));
+
+ AliMUONCluster* rv(0x0);
+
+ if (cluster->Multiplicity(0) && cluster->Multiplicity(1))
+ {
+ rv = CheckPreclusterTwoCathodes(cluster);
+ }
+ else
+ {
+ rv = cluster;
+ }
+ return rv;
+}
+
+//_____________________________________________________________________________
+AliMUONCluster*
+AliMUONClusterFinderPeakCOG::CheckPreclusterTwoCathodes(AliMUONCluster* cluster)
+{
+ /// Check two-cathode cluster
+
+ Int_t npad = cluster->Multiplicity();
+ Int_t* flags = new Int_t[npad];
+ for (Int_t j = 0; j < npad; ++j) flags[j] = 0;
+
+ // Check pad overlaps
+ for ( Int_t i = 0; i < npad; ++i)
+ {
+ AliMUONPad* padi = cluster->Pad(i);
+ if ( padi->Cathode() != 0 ) continue;
+ for (Int_t j = i+1; j < npad; ++j)
+ {
+ AliMUONPad* padj = cluster->Pad(j);
+ if ( padj->Cathode() != 1 ) continue;
+ if ( !AliMUONPad::AreOverlapping(*padi,*padj,fgkDecreaseSize) ) continue;
+ flags[i] = flags[j] = 1; // mark overlapped pads
+ }
+ }
+
+ // Check if all pads overlap
+ Int_t nFlags=0;
+ for (Int_t i = 0; i < npad; ++i)
+ {
+ if (!flags[i]) ++nFlags;
+ }
+
+ if (nFlags > 0)
+ {
+ // not all pads overlap.
+ if (fDebug) cout << " nFlags: " << nFlags << endl;
+ TObjArray toBeRemoved;
+ for (Int_t i = 0; i < npad; ++i)
+ {
+ AliMUONPad* pad = cluster->Pad(i);
+ if (flags[i]) continue;
+ Int_t cath = pad->Cathode();
+ Int_t cath1 = TMath::Even(cath);
+ // Check for edge effect (missing pads on the _other_ cathode)
+ AliMpPad mpPad = fSegmentation[cath1]->PadByPosition(pad->Position(),kFALSE);
+ if (!mpPad.IsValid()) continue;
+ //if (nFlags == 1 && pad->Charge() < fgkZeroSuppression * 3) continue;
+ if (nFlags == 1 && pad->Charge() < 20) continue;
+ AliDebug(2,Form("Releasing the following pad : de,cath,ix,iy %d,%d,%d,%d charge %e",
+ fDetElemId,pad->Cathode(),pad->Ix(),pad->Iy(),pad->Charge()));
+ toBeRemoved.AddLast(pad);
+ fPreCluster->Pad(i)->Release();
+ }
+ Int_t nRemove = toBeRemoved.GetEntriesFast();
+ for ( Int_t i = 0; i < nRemove; ++i )
+ {
+ cluster->RemovePad(static_cast<AliMUONPad*>(toBeRemoved.UncheckedAt(i)));
+ }
+ }
+
+ // Check correlations of cathode charges
+ if ( !cluster->IsSaturated() && cluster->ChargeAsymmetry() > 1 )
+ {
+ // big difference
+ Int_t cathode = cluster->MaxRawChargeCathode();
+ Int_t imin(-1);
+ Int_t imax(-1);
+ Double_t cmax(0);
+ Double_t cmin(1E9);
+
+ // get min and max pad charges on the cathode opposite to the
+ // max pad (given by MaxRawChargeCathode())
+ //
+ Int_t mult = cluster->Multiplicity();
+ for ( Int_t i = 0; i < mult; ++i )
+ {
+ AliMUONPad* pad = cluster->Pad(i);
+ if ( pad->Cathode() != cathode || !pad->IsReal() )
+ {
+ // only consider pads in the opposite cathode, and
+ // only consider real pads (i.e. exclude the virtual ones)
+ continue;
+ }
+ if ( pad->Charge() < cmin )
+ {
+ cmin = pad->Charge();
+ imin = i;
+ if (imax < 0) {
+ imax = imin;
+ cmax = cmin;
+ }
+ }
+ else if ( pad->Charge() > cmax )
+ {
+ cmax = pad->Charge();
+ imax = i;
+ }
+ }
+ AliDebug(2,Form("Pad imin,imax %d,%d cmin,cmax %e,%e",
+ imin,imax,cmin,cmax));
+ //
+ // arrange pads according to their distance to the max, normalized
+ // to the pad size
+ Double_t* dist = new Double_t[mult];
+ Double_t dxMin(1E9);
+ Double_t dyMin(1E9);
+ Double_t dmin(0);
+
+ AliMUONPad* padmax = cluster->Pad(imax);
+
+ for ( Int_t i = 0; i < mult; ++i )
+ {
+ dist[i] = 0.0;
+ if ( i == imax) continue;
+ AliMUONPad* pad = cluster->Pad(i);
+ if ( pad->Cathode() != cathode || !pad->IsReal() ) continue;
+ Double_t dx = (pad->X()-padmax->X())/padmax->DX()/2.0;
+ Double_t dy = (pad->Y()-padmax->Y())/padmax->DY()/2.0;
+ dist[i] = TMath::Sqrt(dx*dx+dy*dy);
+ if ( i == imin )
+ {
+ dmin = dist[i] + 1E-3; // distance to the pad with minimum charge
+ dxMin = dx;
+ dyMin = dy;
+ }
+ }
+
+ TMath::Sort(mult,dist,flags,kFALSE); // in ascending order
+ Double_t xmax(-1), distPrev(999);
+ TObjArray toBeRemoved;
+
+ for ( Int_t i = 0; i < mult; ++i )
+ {
+ Int_t indx = flags[i];
+ AliMUONPad* pad = cluster->Pad(indx);
+ if ( pad->Cathode() != cathode || !pad->IsReal() ) continue;
+ if ( dist[indx] > dmin )
+ {
+ // farther than the minimum pad
+ Double_t dx = (pad->X()-padmax->X())/padmax->DX()/2.0;
+ Double_t dy = (pad->Y()-padmax->Y())/padmax->DY()/2.0;
+ dx *= dxMin;
+ dy *= dyMin;
+ if (dx >= 0 && dy >= 0) continue;
+ if (TMath::Abs(dx) > TMath::Abs(dy) && dx >= 0) continue;
+ if (TMath::Abs(dy) > TMath::Abs(dx) && dy >= 0) continue;
+ }
+ if (dist[indx] > distPrev + 1) break; // overstepping empty pads
+ if ( pad->Charge() <= cmax || TMath::Abs(dist[indx]-xmax) < 1E-3 )
+ {
+ // release pad
+ if (TMath::Abs(dist[indx]-xmax) < 1.e-3)
+ {
+ cmax = TMath::Max(pad->Charge(),cmax);
+ }
+ else
+ {
+ cmax = pad->Charge();
+ }
+ xmax = dist[indx];
+ distPrev = dist[indx];
+ AliDebug(2,Form("Releasing the following pad : de,cath,ix,iy %d,%d,%d,%d charge %e",
+ fDetElemId,pad->Cathode(),pad->Ix(),pad->Iy(),
+ pad->Charge()));
+
+ toBeRemoved.AddLast(pad);
+ fPreCluster->Pad(indx)->Release();
+ }
+ }
+ Int_t nRemove = toBeRemoved.GetEntriesFast();
+ for ( Int_t i = 0; i < nRemove; ++i )
+ {
+ cluster->RemovePad(static_cast<AliMUONPad*>(toBeRemoved.UncheckedAt(i)));
+ }
+ delete[] dist;
+ } // if ( !cluster->IsSaturated() &&
+
+ delete[] flags;
+
+ AliDebug(2,"End of CheckPreClusterTwoCathodes=");
+ //StdoutToAliDebug(2,cluster->Print("full"));
+
+ return cluster;
+}
+
+//_____________________________________________________________________________
+void
+AliMUONClusterFinderPeakCOG::CheckOverlaps()
+{
+ /// For debug only : check if some pixels overlap...
+
+ Int_t nPix = fPixArray->GetLast()+1;
+ Int_t dummy(0);
+
+ for ( Int_t i = 0; i < nPix; ++i )
+ {
+ AliMUONPad* pixelI = Pixel(i);
+ AliMUONPad pi(dummy,dummy,dummy,dummy,
+ pixelI->Coord(0),pixelI->Coord(1),
+ pixelI->Size(0),pixelI->Size(1),0.0);
+
+ for ( Int_t j = i+1; j < nPix; ++j )
+ {
+ AliMUONPad* pixelJ = Pixel(j);
+ AliMUONPad pj(dummy,dummy,dummy,dummy,
+ pixelJ->Coord(0),pixelJ->Coord(1),
+ pixelJ->Size(0),pixelJ->Size(1),0.0);
+ AliMpArea area;
+
+ if ( AliMUONPad::AreOverlapping(pi,pj,fgkDecreaseSize,area) )
+ {
+ AliInfo(Form("The following 2 pixels (%d and %d) overlap !",i,j));
+ /*
+ StdoutToAliInfo(pixelI->Print();
+ cout << " Surface = " << pixelI->Size(0)*pixelI->Size(1)*4 << endl;
+ pixelJ->Print();
+ cout << " Surface = " << pixelJ->Size(0)*pixelJ->Size(1)*4 << endl;
+ cout << " Area surface = " << area.Dimensions().X()*area.Dimensions().Y()*4 << endl;
+ cout << "-------" << endl;
+ );
+ */
+ }
+ }
+ }
+}
+
+//_____________________________________________________________________________
+void AliMUONClusterFinderPeakCOG::BuildPixArray(AliMUONCluster& cluster)
+{
+ /// Build pixel array
+
+ Int_t npad = cluster.Multiplicity();
+ if (npad<=0)
+ {
+ AliWarning("Got no pad at all ?!");
+ }
+
+ fPixArray->Delete();
+ BuildPixArrayOneCathode(cluster);
+
+// StdoutToAliDebug(2,cout << "End of BuildPixelArray:" << endl;
+// fPixArray->Print(););
+ //CheckOverlaps();//FIXME : this is for debug only. Remove it.
+}
+
+//_____________________________________________________________________________
+void AliMUONClusterFinderPeakCOG::BuildPixArrayOneCathode(AliMUONCluster& cluster)
+{
+ /// Build the pixel array
+
+// AliDebug(2,Form("cluster.Multiplicity=%d",cluster.Multiplicity()));
+
+ TVector2 dim = cluster.MinPadDimensions (-1, kFALSE);
+ Double_t width[2] = {dim.X(), dim.Y()}, xy0[2];
+ Int_t found[2] = {0}, mult = cluster.Multiplicity();
+
+ for ( Int_t i = 0; i < mult; ++i) {
+ AliMUONPad* pad = cluster.Pad(i);
+ for (Int_t j = 0; j < 2; ++j) {
+ if (found[j] == 0 && TMath::Abs(pad->Size(j)-width[j]) < fgkDistancePrecision) {
+ xy0[j] = pad->Coord(j);
+ found[j] = 1;
+ }
+ }
+ if (found[0] && found[1]) break;
+ }
+
+ Double_t min[2], max[2];
+ Int_t cath0 = 0, cath1 = 1;
+ if (cluster.Multiplicity(0) == 0) cath0 = 1;
+ else if (cluster.Multiplicity(1) == 0) cath1 = 0;
+
+ TVector2 leftDown = cluster.Area(cath0).LeftDownCorner();
+ TVector2 rightUp = cluster.Area(cath0).RightUpCorner();
+ min[0] = leftDown.X();
+ min[1] = leftDown.Y();
+ max[0] = rightUp.X();
+ max[1] = rightUp.Y();
+ if (cath1 != cath0) {
+ leftDown = cluster.Area(cath1).LeftDownCorner();
+ rightUp = cluster.Area(cath1).RightUpCorner();
+ min[0] = TMath::Max (min[0], leftDown.X());
+ min[1] = TMath::Max (min[1], leftDown.Y());
+ max[0] = TMath::Min (max[0], rightUp.X());
+ max[1] = TMath::Min (max[1], rightUp.Y());
+ }
+
+ // Adjust limits
+ //width[0] /= 2; width[1] /= 2; // just for check
+ Int_t nbins[2];
+ for (Int_t i = 0; i < 2; ++i) {
+ Double_t dist = (min[i] - xy0[i]) / width[i] / 2;
+ if (TMath::Abs(dist) < 1.e-6) dist = -1.e-6;
+ min[i] = xy0[i] + (TMath::Nint(dist-TMath::Sign(1.e-6,dist))
+ + TMath::Sign(0.5,dist)) * width[i] * 2;
+ nbins[i] = TMath::Nint ((max[i] - min[i]) / width[i] / 2);
+ if (nbins[i] == 0) ++nbins[i];
+ max[i] = min[i] + nbins[i] * width[i] * 2;
+ //cout << dist << " " << min[i] << " " << max[i] << " " << nbins[i] << endl;
+ }
+
+ // Book histogram
+ TH2D *hist1 = new TH2D ("Grid", "", nbins[0], min[0], max[0], nbins[1], min[1], max[1]);
+ TH2D *hist2 = new TH2D ("Entries", "", nbins[0], min[0], max[0], nbins[1], min[1], max[1]);
+ TAxis *xaxis = hist1->GetXaxis();
+ TAxis *yaxis = hist1->GetYaxis();
+
+ // Fill histogram
+ for ( Int_t i = 0; i < mult; ++i) {
+ AliMUONPad* pad = cluster.Pad(i);
+ Int_t ix0 = xaxis->FindBin(pad->X());
+ Int_t iy0 = yaxis->FindBin(pad->Y());
+ PadOverHist(0, ix0, iy0, pad, hist1, hist2);
+ }
+
+ // Store pixels
+ for (Int_t i = 1; i <= nbins[0]; ++i) {
+ Double_t x = xaxis->GetBinCenter(i);
+ for (Int_t j = 1; j <= nbins[1]; ++j) {
+ if (hist2->GetCellContent(i,j) < 0.1) continue;
+ if (cath0 != cath1) {
+ // Two-sided cluster
+ Double_t cont = hist2->GetCellContent(i,j);
+ if (cont < 999.) continue;
+ if (cont-Int_t(cont/1000.)*1000. < 0.5) continue;
+ }
+ //if (hist2->GetCellContent(i,j) < 1.1 && cluster.Multiplicity(0) &&
+ // cluster.Multiplicity(1)) continue;
+ Double_t y = yaxis->GetBinCenter(j);
+ Double_t charge = hist1->GetCellContent(i,j);
+ AliMUONPad* pixPtr = new AliMUONPad(x, y, width[0], width[1], charge);
+ fPixArray->Add(pixPtr);
+ }
+ }
+ /*
+ if (fPixArray->GetEntriesFast() == 1) {
+ // Split pixel into 2
+ AliMUONPad* pixPtr = static_cast<AliMUONPad*> (fPixArray->UncheckedAt(0));
+ pixPtr->SetSize(0,width[0]/2.);
+ pixPtr->Shift(0,-width[0]/4.);
+ pixPtr = new AliMUONPad(pixPtr->X()+width[0], pixPtr->Y(), width[0]/2., width[1], pixPtr->Charge());
+ fPixArray->Add(pixPtr);
+ }
+ */
+ //fPixArray->Print();
+ delete hist1;
+ delete hist2;
+}
+
+//_____________________________________________________________________________
+void AliMUONClusterFinderPeakCOG::PadOverHist(Int_t idir, Int_t ix0, Int_t iy0, AliMUONPad *pad,
+ TH2D *hist1, TH2D *hist2)
+{
+ /// "Span" pad over histogram in the direction idir
+
+ TAxis *axis = idir == 0 ? hist1->GetXaxis() : hist1->GetYaxis();
+ Int_t nbins = axis->GetNbins(), cath = pad->Cathode();
+ Double_t bin = axis->GetBinWidth(1), amask = TMath::Power(1000.,cath*1.);
+
+ Int_t nbinPad = (Int_t)(pad->Size(idir)/bin*2+fgkDistancePrecision) + 1; // number of bins covered by pad
+
+ for (Int_t i = 0; i < nbinPad; ++i) {
+ Int_t ixy = idir == 0 ? ix0 + i : iy0 + i;
+ if (ixy > nbins) break;
+ Double_t lowEdge = axis->GetBinLowEdge(ixy);
+ if (lowEdge + fgkDistancePrecision > pad->Coord(idir) + pad->Size(idir)) break;
+ if (idir == 0) PadOverHist(1, ixy, iy0, pad, hist1, hist2); // span in the other direction
+ else {
+ // Fill histogram
+ Double_t cont = pad->Charge();
+ if (hist2->GetCellContent(ix0, ixy) > 0.1)
+ cont = TMath::Min (hist1->GetCellContent(ix0, ixy), cont)
+ + TMath::Min (TMath::Max(hist1->GetCellContent(ix0, ixy),cont)*0.1, 10.);
+ hist1->SetCellContent(ix0, ixy, cont);
+ hist2->SetCellContent(ix0, ixy, hist2->GetCellContent(ix0, ixy)+amask);
+ }
+ }
+
+ for (Int_t i = -1; i > -nbinPad; --i) {
+ Int_t ixy = idir == 0 ? ix0 + i : iy0 + i;
+ if (ixy < 1) break;
+ Double_t upEdge = axis->GetBinUpEdge(ixy);
+ if (upEdge - fgkDistancePrecision < pad->Coord(idir) - pad->Size(idir)) break;
+ if (idir == 0) PadOverHist(1, ixy, iy0, pad, hist1, hist2); // span in the other direction
+ else {
+ // Fill histogram
+ Double_t cont = pad->Charge();
+ if (hist2->GetCellContent(ix0, ixy) > 0.1)
+ cont = TMath::Min (hist1->GetCellContent(ix0, ixy), cont)
+ + TMath::Min (TMath::Max(hist1->GetCellContent(ix0, ixy),cont)*0.1,10.);
+ hist1->SetCellContent(ix0, ixy, cont);
+ hist2->SetCellContent(ix0, ixy, hist2->GetCellContent(ix0, ixy)+amask);
+ }
+ }
+}
+
+//_____________________________________________________________________________
+Int_t AliMUONClusterFinderPeakCOG::FindLocalMaxima(TObjArray *pixArray, Int_t *localMax, Double_t *maxVal)
+{
+/// Find local maxima in pixel space
+
+ AliDebug(1,Form("nPix=%d",pixArray->GetLast()+1));
+
+ //TH2D *hist = NULL;
+ //delete ((TH2D*) gROOT->FindObject("anode"));
+ //if (pixArray == fPixArray) hist = (TH2D*) gROOT->FindObject("anode");
+ //else { hist = (TH2D*) gROOT->FindObject("anode1"); cout << hist << endl; }
+ //if (hist) hist->Delete();
+ delete fHistAnode;
+
+ Double_t xylim[4] = {999, 999, 999, 999};
+
+ Int_t nPix = pixArray->GetEntriesFast();
+ AliMUONPad *pixPtr = 0;
+ for (Int_t ipix = 0; ipix < nPix; ++ipix) {
+ pixPtr = (AliMUONPad*) pixArray->UncheckedAt(ipix);
+ for (Int_t i = 0; i < 4; ++i)
+ xylim[i] = TMath::Min (xylim[i], (i%2 ? -1 : 1)*pixPtr->Coord(i/2));
+ }
+ for (Int_t i = 0; i < 4; ++i) xylim[i] -= pixPtr->Size(i/2);
+
+ Int_t nx = TMath::Nint ((-xylim[1]-xylim[0])/pixPtr->Size(0)/2);
+ Int_t ny = TMath::Nint ((-xylim[3]-xylim[2])/pixPtr->Size(1)/2);
+ if (pixArray == fPixArray) fHistAnode = new TH2D("anode","anode",nx,xylim[0],-xylim[1],ny,xylim[2],-xylim[3]);
+ else fHistAnode = new TH2D("anode1","anode1",nx,xylim[0],-xylim[1],ny,xylim[2],-xylim[3]);
+ for (Int_t ipix = 0; ipix < nPix; ++ipix) {
+ pixPtr = (AliMUONPad*) pixArray->UncheckedAt(ipix);
+ fHistAnode->Fill(pixPtr->Coord(0), pixPtr->Coord(1), pixPtr->Charge());
+ }
+// if (fDraw && pixArray == fPixArray) fDraw->DrawHist("c2", hist);
+
+ Int_t nMax = 0, indx, nxy = ny * nx;
+ Int_t *isLocalMax = new Int_t[nxy];
+ for (Int_t i = 0; i < nxy; ++i) isLocalMax[i] = 0;
+
+ for (Int_t i = 1; i <= ny; ++i) {
+ indx = (i-1) * nx;
+ for (Int_t j = 1; j <= nx; ++j) {
+ if (fHistAnode->GetCellContent(j,i) < 0.5) continue;
+ //if (isLocalMax[indx+j-1] < 0) continue;
+ if (isLocalMax[indx+j-1] != 0) continue;
+ FlagLocalMax(fHistAnode, i, j, isLocalMax);
+ }
+ }
+
+ for (Int_t i = 1; i <= ny; ++i) {
+ indx = (i-1) * nx;
+ for (Int_t j = 1; j <= nx; ++j) {
+ if (isLocalMax[indx+j-1] > 0) {
+ localMax[nMax] = indx + j - 1;
+ maxVal[nMax++] = fHistAnode->GetCellContent(j,i);
+ if (nMax > 99) AliFatal(" Too many local maxima !!!");
+ }
+ }
+ }
+ if (fDebug) cout << " Local max: " << nMax << endl;
+ delete [] isLocalMax;
+ return nMax;
+}
+
+//_____________________________________________________________________________
+void AliMUONClusterFinderPeakCOG::FlagLocalMax(TH2D *hist, Int_t i, Int_t j, Int_t *isLocalMax)
+{
+/// Flag pixels (whether or not local maxima)
+
+ Int_t nx = hist->GetNbinsX();
+ Int_t ny = hist->GetNbinsY();
+ Int_t cont = TMath::Nint (hist->GetCellContent(j,i));
+ Int_t cont1 = 0, indx = (i-1)*nx+j-1, indx1 = 0, indx2 = 0;
+
+ Int_t ie = i + 2, je = j + 2;
+ for (Int_t i1 = i-1; i1 < ie; ++i1) {
+ if (i1 < 1 || i1 > ny) continue;
+ indx1 = (i1 - 1) * nx;
+ for (Int_t j1 = j-1; j1 < je; ++j1) {
+ if (j1 < 1 || j1 > nx) continue;
+ if (i == i1 && j == j1) continue;
+ indx2 = indx1 + j1 - 1;
+ cont1 = TMath::Nint (hist->GetCellContent(j1,i1));
+ if (cont < cont1) { isLocalMax[indx] = -1; return; }
+ else if (cont > cont1) isLocalMax[indx2] = -1;
+ else { // the same charge
+ isLocalMax[indx] = 1;
+ if (isLocalMax[indx2] == 0) {
+ FlagLocalMax(hist, i1, j1, isLocalMax);
+ if (isLocalMax[indx2] < 0) { isLocalMax[indx] = -1; return; }
+ else isLocalMax[indx2] = -1;
+ }
+ }
+ }
+ }
+ isLocalMax[indx] = 1; // local maximum
+}
+
+//_____________________________________________________________________________
+void AliMUONClusterFinderPeakCOG::FindCluster(AliMUONCluster& cluster,
+ Int_t *localMax, Int_t iMax)
+{
+/// Find pixel cluster around local maximum \a iMax and pick up pads
+/// overlapping with it
+
+ //TH2D *hist = (TH2D*) gROOT->FindObject("anode");
+ /* Just for check
+ TCanvas* c = new TCanvas("Anode","Anode",800,600);
+ c->cd();
+ hist->Draw("lego1Fb"); // debug
+ c->Update();
+ Int_t tmp;
+ cin >> tmp;
+ */
+ Int_t nx = fHistAnode->GetNbinsX();
+ //Int_t ny = hist->GetNbinsY();
+ Int_t ic = localMax[iMax] / nx + 1;
+ Int_t jc = localMax[iMax] % nx + 1;
+
+ // Get min pad dimensions for the precluster
+ Int_t nSides = 2;
+ if (cluster.Multiplicity(0) == 0 || cluster.Multiplicity(1) == 0) nSides = 1;
+ TVector2 dim0 = cluster.MinPadDimensions(0, -1, kFALSE);
+ TVector2 dim1 = cluster.MinPadDimensions(1, -1, kFALSE);
+ //Double_t width[2][2] = {{dim0.X(), dim0.Y()},{dim1.X(),dim1.Y()}};
+ Int_t nonb[2] = {1, 0}; // coordinate index vs cathode
+ if (nSides == 1 || dim0.X() < dim1.X() - fgkDistancePrecision) {
+ nonb[0] = 0;
+ nonb[1] = 1;
+ }
+ Bool_t samex = kFALSE, samey = kFALSE;
+ if (TMath::Abs(dim0.X()-dim1.X()) < fgkDistancePrecision) samex = kTRUE; // the same X pad size on both planes
+ if (TMath::Abs(dim0.Y()-dim1.Y()) < fgkDistancePrecision) samey = kTRUE; // the same Y pad size on both planes
+
+ // Drop all pixels from the array - pick up only the ones from the cluster
+ //fPixArray->Delete();
+
+ Double_t wx = fHistAnode->GetXaxis()->GetBinWidth(1)/2;
+ Double_t wy = fHistAnode->GetYaxis()->GetBinWidth(1)/2;
+ Double_t yc = fHistAnode->GetYaxis()->GetBinCenter(ic);
+ Double_t xc = fHistAnode->GetXaxis()->GetBinCenter(jc);
+ Double_t cont = fHistAnode->GetCellContent(jc,ic);
+ AliMUONPad* pixPtr = new AliMUONPad (xc, yc, wx, wy, cont);
+ if (fDebug) pixPtr->Print("full");
+
+ Int_t npad = cluster.Multiplicity();
+
+ // Pick up pads which overlap with the maximum pixel and find pads with the max signal
+ Double_t qMax[2] = {0};
+ AliMUONPad *matrix[2][3] = {{0x0,0x0,0x0},{0x0,0x0,0x0}};
+ for (Int_t j = 0; j < npad; ++j)
+ {
+ AliMUONPad* pad = cluster.Pad(j);
+ if ( Overlap(*pad,*pixPtr) )
+ {
+ if (fDebug) { cout << j << " "; pad->Print("full"); }
+ if (pad->Charge() > qMax[pad->Cathode()]) {
+ qMax[pad->Cathode()] = pad->Charge();
+ matrix[pad->Cathode()][1] = pad;
+ if (nSides == 1) matrix[!pad->Cathode()][1] = pad;
+ }
+ }
+ }
+ //if (nSides == 2 && (matrix[0][1] == 0x0 || matrix[1][1] == 0x0)) return; // ???
+
+ // Find neighbours of maxima to have 3 pads per direction (if possible)
+ for (Int_t j = 0; j < npad; ++j)
+ {
+ AliMUONPad* pad = cluster.Pad(j);
+ Int_t cath = pad->Cathode();
+ if (pad == matrix[cath][1]) continue;
+ Int_t nLoops = 3 - nSides;
+
+ for (Int_t k = 0; k < nLoops; ++k) {
+ Int_t cath1 = cath;
+ if (k) cath1 = !cath;
+
+ // Check the coordinate corresponding to the cathode (bending or non-bending case)
+ Double_t dist = pad->Coord(nonb[cath1]) - matrix[cath][1]->Coord(nonb[cath1]);
+ Double_t dir = TMath::Sign (1., dist);
+ dist = TMath::Abs(dist) - pad->Size(nonb[cath1]) - matrix[cath][1]->Size(nonb[cath1]);
+
+ if (TMath::Abs(dist) < fgkDistancePrecision) {
+ // Check the other coordinate
+ dist = pad->Coord(!nonb[cath1]) - matrix[cath1][1]->Coord(!nonb[cath1]);
+ if (TMath::Abs(dist) >
+ TMath::Max(pad->Size(!nonb[cath1]), matrix[cath1][1]->Size(!nonb[cath1])) - fgkDistancePrecision) break;
+ Int_t idir = TMath::Nint (dir);
+ if (matrix[cath1][1+idir] == 0x0) matrix[cath1][1+idir] = pad;
+ else if (pad->Charge() > matrix[cath1][1+idir]->Charge()) matrix[cath1][1+idir] = pad; // diff. segmentation
+ //cout << pad->Coord(nonb[cath1]) << " " << pad->Coord(!nonb[cath1]) << " " << pad->Size(nonb[cath1]) << " " << pad->Size(!nonb[cath1]) << " " << pad->Charge() << endl ;
+ break;
+ }
+ }
+ }
+
+ Double_t coord[2] = {0.}, qAver = 0.;
+ for (Int_t i = 0; i < 2; ++i) {
+ Double_t q = 0.;
+ Double_t coordQ = 0.;
+ Int_t cath = matrix[i][1]->Cathode();
+ if (i && nSides == 1) cath = !cath;
+ for (Int_t j = 0; j < 3; ++j) {
+ if (matrix[i][j] == 0x0) continue;
+ Double_t dq = matrix[i][j]->Charge();
+ q += dq;
+ coordQ += dq * matrix[i][j]->Coord(nonb[cath]);
+ //coordQ += (matrix[i][j]->Charge() * matrix[i][j]->Coord(nonb[cath]));
+ }
+ coord[cath] = coordQ / q;
+ qAver = TMath::Max (qAver, q);
+ }
+
+ //qAver = TMath::Sqrt(qAver);
+ if ( qAver >= 14 )
+ {
+
+ AliMUONCluster* cluster1 = new AliMUONCluster(cluster);
+
+ cluster1->SetCharge(qAver,qAver);
+ if (nonb[0] == 1)
+ cluster1->SetPosition(TVector2(coord[1],coord[0]),TVector2(0.,0.));
+ else
+ cluster1->SetPosition(TVector2(coord[0],coord[1]),TVector2(0.,0.));
+
+ cluster1->SetChi2(0.);
+
+ // FIXME: we miss some information in this cluster, as compared to
+ // the original AddRawCluster code.
+
+ AliDebug(2,Form("Adding RawCluster detElemId %4d mult %2d charge %5d (xl,yl)=(%9.6g,%9.6g)",
+ fDetElemId,cluster1->Multiplicity(),(Int_t)cluster1->Charge(),
+ cluster1->Position().X(),cluster1->Position().Y()));
+
+ fClusterList.Add(cluster1);
+ }
+}
+
+//_____________________________________________________________________________
+AliMUONClusterFinderPeakCOG&
+AliMUONClusterFinderPeakCOG::operator=(const AliMUONClusterFinderPeakCOG& rhs)
+{
+/// Protected assignement operator
+
+ if (this == &rhs) return *this;
+
+ AliFatal("Not implemented.");
+
+ return *this;
+}
+
+//_____________________________________________________________________________
+void AliMUONClusterFinderPeakCOG::PadsInXandY(AliMUONCluster& cluster,
+ Int_t &nInX, Int_t &nInY) const
+{
+ /// Find number of pads in X and Y-directions (excluding virtual ones and
+ /// overflows)
+
+ //Int_t statusToTest = 1;
+ Int_t statusToTest = fgkUseForFit;
+
+ //if ( nInX < 0 ) statusToTest = 0;
+ if ( nInX < 0 ) statusToTest = fgkZero;
+
+ Bool_t mustMatch(kTRUE);
+
+ AliMpIntPair cn = cluster.NofPads(statusToTest,mustMatch);
+
+ nInX = cn.GetFirst();
+ nInY = cn.GetSecond();
+}
+
+//_____________________________________________________________________________
+void AliMUONClusterFinderPeakCOG::RemovePixel(Int_t i)
+{
+ /// Remove pixel at index i
+ AliMUONPad* pixPtr = Pixel(i);
+ fPixArray->RemoveAt(i);
+ delete pixPtr;
+}
+
+//_____________________________________________________________________________
+AliMUONPad*
+AliMUONClusterFinderPeakCOG::Pixel(Int_t i) const
+{
+ /// Returns pixel at index i
+ return static_cast<AliMUONPad*>(fPixArray->UncheckedAt(i));
+}
+
+//_____________________________________________________________________________
+void
+AliMUONClusterFinderPeakCOG::Print(Option_t* what) const
+{
+ /// printout
+ TString swhat(what);
+ swhat.ToLower();
+ if ( swhat.Contains("precluster") )
+ {
+ if ( fPreCluster) fPreCluster->Print();
+ }
+}
+
+
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff