+/**************************************************************************
+ * 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 AliCalcluster
+// Description of a cluster of calorimeter modules.
+// A 2D (matrix) geometry is assumed in which a cluster center is identified
+// by two integer indices (i,j), e.g. row and column indicators.
+//
+// The 1st signal value is the signal of the complete cluster.
+// This is the signal which is provided as default by invoking GetSignal().
+//
+// In case clustering/grouping of module signals was performed over several
+// rings around the center (see e.g. AliCalorimeter::Group), the following
+// additional information is provided by the various signal values :
+//
+// The 2nd signal value is the original signal of the central module.
+// The 3rd signal value is the total signal within the 1st (i.e. 3x3) ring of
+// modules around the cluster center.
+// The 4th signal value is the total signal within the 2nd (i.e. 5x5) ring of
+// modules around the cluster center.
+// Etc....
+//
+// Note : In case the cluster consists of only 1 module, then only the
+// 1st signal value will be present (for obvious reasons).
+//
+// Some dispersion info about cluster topology is provided in order
+// to enable EM or hadronic cluster identification.
+//
+//--- Author: Nick van Eijndhoven 13-jun-1997 UU-SAP Utrecht
+//- Modified: NvE $Date$ UU-SAP Utrecht
+///////////////////////////////////////////////////////////////////////////
+
#include "AliCalcluster.h"
+#include "Riostream.h"
ClassImp(AliCalcluster) // Class implementation to enable ROOT I/O
-AliCalcluster::AliCalcluster()
+AliCalcluster::AliCalcluster() : AliSignal()
{
-// Default constructer, all data is set to 0
- fCenter=0;
- fSig=0.;
+// Default constructor, all data is set to 0
+ fRow=0;
+ fCol=0;
fNmods=0;
- fSig11=0.;
- fSig33=0.;
- fSig55=0.;
fRowdisp=0.;
fColdisp=0.;
fNvetos=0;
fVetos=0;
+ SetName("AliCalcluster [sig, sig11, sig33, sig55,...]");
}
///////////////////////////////////////////////////////////////////////////
AliCalcluster::~AliCalcluster()
// Destructor to delete dynamically allocated memory
if (fVetos)
{
- fVetos->Delete();
delete fVetos;
fVetos=0;
}
}
///////////////////////////////////////////////////////////////////////////
-AliCalcluster::AliCalcluster(AliCalmodule& m)
+AliCalcluster::AliCalcluster(AliCalcluster& c) : AliSignal(c)
+{
+// Copy constructor
+ fRow=c.fRow;
+ fCol=c.fCol;
+ fNmods=c.fNmods;
+ fRowdisp=c.fRowdisp;
+ fColdisp=c.fColdisp;
+ fNvetos=c.fNvetos;
+
+ fVetos=new TObjArray();
+ fVetos->SetOwner();
+
+ for (Int_t i=1; i<=fNvetos; i++)
+ {
+ AliSignal* sx=c.GetVetoSignal(i);
+ fVetos->Add(new AliSignal(*sx));
+ }
+}
+///////////////////////////////////////////////////////////////////////////
+AliCalcluster::AliCalcluster(AliCalmodule& m) : AliSignal()
{
// Cluster constructor with module m as center.
-// Module data is only entered for a module which contains
-// a signal and has not been used in a cluster yet.
-// Modules situated at a detector edge are not allowed to start a cluster.
+// Module data is only entered for a module which contains a signal,
+// has not been used in a cluster yet, and is not declared dead.
+//
+// Note :
+// It is advised NOT to start a cluster with modules situated at a detector edge.
+// This feature is automatically checked when using the built-in clustering
+// of AliCalorimeter.
- Float_t pos[3]={0,0,0};
+ Ali3Vector r;
- if ((m.GetClusteredSignal() > 0.) && (m.GetEdgeValue() == 0))
+ Float_t sig=m.GetClusteredSignal();
+
+ if (sig>0. && m.GetDeadValue()==0)
{
- fCenter=&m;
- m.GetPosition(pos,"sph");
- SetPosition(pos,"sph");
- fSig=m.GetClusteredSignal();
+ fRow=m.GetRow();
+ fCol=m.GetColumn();
+ r=m.GetPosition();
+ SetPosition(r);
+ SetSignal(sig);
fNmods=1;
- fSig11=m.GetClusteredSignal();
- fSig33=m.GetClusteredSignal();
- fSig55=m.GetClusteredSignal();
fRowdisp=0.;
fColdisp=0.;
m.SetClusteredSignal(0.); // mark module as used in cluster
}
else
{
- fCenter=0;
- SetPosition(pos,"sph");
- fSig=0.;
+ fRow=0;
+ fCol=0;
+ SetPosition(r);
fNmods=0;
- fSig11=0.;
- fSig33=0.;
- fSig55=0.;
fRowdisp=0.;
fColdisp=0.;
fNvetos=0;
fVetos=0;
-}
+ }
+ SetName("AliCalcluster [sig, sig11, sig33, sig55,...]");
}
///////////////////////////////////////////////////////////////////////////
Int_t AliCalcluster::GetRow()
{
// Provide the row number of the cluster center
- if (fCenter)
- {
- return fCenter->GetRow();
- }
- else
- {
- return 0;
- }
+ return fRow;
}
///////////////////////////////////////////////////////////////////////////
Int_t AliCalcluster::GetColumn()
{
// Provide the column number of the cluster center
- if (fCenter)
- {
- return fCenter->GetColumn();
- }
- else
- {
- return 0;
- }
-}
-///////////////////////////////////////////////////////////////////////////
-Float_t AliCalcluster::GetSignal(Int_t n)
-{
-// Provide the total signal of a module matrix of n modules around
-// the cluster center.
-// Example : n=9 --> total signal in the 3x3 matrix
-// 1 --> signal of central module
-// Note : n=0 provides the total cluster signal (Default)
-
- Float_t signal=-1;
-
- if (n == 0) signal=fSig;
- if (n == 1) signal=fSig11;
- if (n == 9) signal=fSig33;
- if (n == 25) signal=fSig55;
-
- if (signal > 0.)
- {
- return signal;
- }
- else
- {
- cout << " *AliCalcluster::GetSignal* Invalid argument n = " << n << endl;
- return 0;
- }
+ return fCol;
}
///////////////////////////////////////////////////////////////////////////
Int_t AliCalcluster::GetNmodules()
///////////////////////////////////////////////////////////////////////////
Float_t AliCalcluster::GetRowDispersion()
{
-// Provide the normalised row dispersion of the cluster
- if (fSig > 0.)
+// Provide the normalised row dispersion of the cluster.
+ Float_t sig=GetSignal();
+ if (sig > 0.)
{
- return fRowdisp/fSig;
+ return fRowdisp/sig;
}
else
{
Float_t AliCalcluster::GetColumnDispersion()
{
// Provide the normalised column dispersion of the cluster
- if (fSig > 0.)
+ Float_t sig=GetSignal();
+ if (sig > 0.)
{
- return fColdisp/fSig;
+ return fColdisp/sig;
}
else
{
///////////////////////////////////////////////////////////////////////////
void AliCalcluster::Start(AliCalmodule& m)
{
-// Reset cluster data and start with module m
-// A module can only start a cluster when it contains
-// a signal, has not been used in a cluster yet and is not
-// situated at a detector edge
+// Reset cluster data and start with module m.
+// A module can only start a cluster when it contains a signal,
+// has not been used in a cluster yet, and is not declared dead.
+//
+// Note :
+// It is advised NOT to start a cluster with modules situated at a detector edge.
+// This feature is automatically checked when using the built-in clustering
+// of AliCalorimeter.
- Float_t pos[3]={0,0,0};
+ AliSignal::Reset();
- if ((m.GetClusteredSignal() > 0.) && (m.GetEdgeValue() == 0))
+ Ali3Vector r;
+
+ if (m.GetClusteredSignal()>0. && m.GetDeadValue()==0)
{
- fCenter=&m;
- m.GetPosition(pos,"sph");
- SetPosition(pos,"sph");
- fSig=m.GetSignal();
+ fRow=m.GetRow();
+ fCol=m.GetColumn();
+ r=m.GetPosition();
+ SetPosition(r);
+ SetSignal(m.GetSignal());
fNmods=1;
- fSig11=m.GetSignal();
- fSig33=m.GetSignal();
- fSig55=m.GetSignal();
fRowdisp=0.;
fColdisp=0.;
m.SetClusteredSignal(0.); // mark module as used in cluster
}
else
{
- fCenter=0;
- SetPosition(pos,"sph");
- fSig=0.;
+ fRow=0;
+ fCol=0;
+ SetPosition(r);
fNmods=0;
- fSig11=0.;
- fSig33=0.;
- fSig55=0.;
fRowdisp=0.;
fColdisp=0.;
}
///////////////////////////////////////////////////////////////////////////
void AliCalcluster::Add(AliCalmodule& m)
{
-// Add module data to the cluster
+// Add module data to the cluster.
+// Dead modules are NOT added to the cluster.
+// According to the distance of the module w.r.t. the cluster center
+// the various signal values are updated.
- Float_t signal=m.GetClusteredSignal();
+ if (fNmods)
+ {
+ Float_t sigm=m.GetClusteredSignal();
- if (signal > 0.) // only add unused modules
- {
- fSig+=signal;
- fNmods+=1;
- Int_t drow=int(fabs(double(GetRow()-m.GetRow()))); // row distance to center
- Int_t dcol=int(fabs(double(GetColumn()-m.GetColumn()))); // column distance to center
- if ((drow < 2) && (dcol < 2)) fSig33+=signal;
- if ((drow < 3) && (dcol < 3)) fSig55+=signal;
- fRowdisp+=signal*float(drow*drow);
- fColdisp+=signal*float(dcol*dcol);
- m.SetClusteredSignal(0.); // mark module as used in cluster
+ if (sigm>0. && m.GetDeadValue()==0) // only add unused modules
+ {
+ Int_t drow=int(fabs(double(GetRow()-m.GetRow()))); // row distance to center
+ Int_t dcol=int(fabs(double(GetColumn()-m.GetColumn()))); // column distance to center
+
+ // Determine the ring index for this module around the cluster center
+ Int_t jring=drow;
+ if (dcol>drow) jring=dcol;
+
+ Int_t nvalues=GetNvalues();
+
+ if ((jring+2)<=nvalues) // Module within existing ring(s) ==> Add module signal to the enclosing ring(s)
+ {
+ for (Int_t i=(jring+2); i<=nvalues; i++)
+ {
+ AddSignal(sigm,i);
+ }
+ }
+ else // Module outside all existing rings ==> Init. new ring signals with existing enclosed signal(s)
+ {
+ for (Int_t j=(nvalues+1); j<=(jring+2); j++)
+ {
+ SetSignal(GetSignal(j-1),j);
+ }
+ // Add current module signal to the signal value for the corresponding ring
+ AddSignal(sigm,(jring+2));
+ }
+
+ // Update total cluster signal
+ AddSignal(sigm);
+
+ fNmods+=1;
+ fRowdisp+=sigm*float(drow*drow);
+ fColdisp+=sigm*float(dcol*dcol);
+ m.SetClusteredSignal(0.); // mark module as used in cluster
+ }
+ }
+ else
+ {
+ cout << " *AliCalcluster::Add* No action. Cluster should be started first."
+ << endl;
}
}
///////////////////////////////////////////////////////////////////////////
-void AliCalcluster::AddVetoSignal(Float_t* r,TString f,Float_t s)
+void AliCalcluster::AddVetoSignal(AliSignal& s,Int_t extr)
{
-// Associate an (extrapolated) AliSignal at location r as veto to the cluster
-// Note : The default signal value (s) is 0
+// Associate an (extrapolated) AliSignal as veto to the cluster.
+// By default a straight line extrapolation is performed which extrapolates
+// the signal position until the length of its position vector matches that
+// of the position vector of the cluster.
+// In this extrapolation procedure the error propagation is performed
+// automatically.
+// Based on the cluster and extrapolated veto signal (x,y) positions and
+// position errors the confidence level of association is calculated
+// and stored as an additional signal value.
+// By means of the GetVetoSignal memberfunction the confidence level of
+// association can always be updated by the user.
+// In case the user wants to invoke a more detailed extrapolation procedure,
+// the automatic extrapolation can be suppressed by setting the argument
+// extr=0. In this case it is assumed that the AliSignal as entered via
+// the argument contains already the extrapolated position vector and
+// corresponding errors.
+// Note : Three additional values are added to the original AliSignal
+// to hold the chi2, ndf and confidence level values of the association.
if (!fVetos)
{
fNvetos=0;
fVetos=new TObjArray();
+ fVetos->SetOwner();
}
- fVetos->Add(new AliSignal);
- fNvetos++;
+ Int_t nvalues=s.GetNvalues();
+ AliSignal* sx=new AliSignal(s); // Additional values will be added
+ TString name=s.GetName();
+ name.Append(" + additional chi2, ndf and CL values");
+ sx->SetName(name);
+
+ Double_t vecc[3],vecv[3];
+ if (extr)
+ {
+ // Extrapolate the veto hit position
+ Double_t scale=1;
+ GetPosition(vecc,"sph");
+ s.GetPosition(vecv,"sph");
+ if (vecv[0]) scale=vecc[0]/vecv[0];
+ Ali3Vector r=s*scale;
+ sx->SetPosition(r);
+ }
- ((AliSignal*)fVetos->At(fNvetos-1))->SetPosition(r,f);
- ((AliSignal*)fVetos->At(fNvetos-1))->SetSignal(s);
+ // Calculate the confidence level of association
+ GetPosition(vecc,"car");
+ sx->GetPosition(vecv,"car");
+ Double_t dx=vecc[0]-vecv[0];
+ Double_t dy=vecc[1]-vecv[1];
+ GetPositionErrors(vecc,"car");
+ sx->GetPositionErrors(vecv,"car");
+ Double_t sxc2=vecc[0]*vecc[0];
+ Double_t syc2=vecc[1]*vecc[1];
+ Double_t sxv2=vecv[0]*vecv[0];
+ Double_t syv2=vecv[1]*vecv[1];
+ Double_t sumx2=sxc2+sxv2;
+ Double_t sumy2=syc2+syv2;
+ Double_t chi2=0;
+ if (sumx2>0 && sumy2>0) chi2=(dx*dx/sumx2)+(dy*dy/sumy2);
+ Int_t ndf=2;
+ AliMath m;
+ Double_t prob=m.Prob(chi2,ndf);
+ if (chi2>0) sx->SetSignal(chi2,nvalues+1);
+ if (ndf>0) sx->SetSignal(ndf,nvalues+2);
+ if (prob>0) sx->SetSignal(prob,nvalues+3);
+
+ fVetos->Add(sx);
+ fNvetos++;
}
///////////////////////////////////////////////////////////////////////////
Int_t AliCalcluster::GetNvetos()
///////////////////////////////////////////////////////////////////////////
AliSignal* AliCalcluster::GetVetoSignal(Int_t i)
{
-// Provide access to the i-th veto signal of this cluster
-// Note : The first hit corresponds to i=1
-
- if (i>0 && i<=fNvetos)
+// Provide access to the i-th veto signal of this cluster.
+// Note : The first hit corresponds to i=1.
+ if (!fVetos)
{
- return (AliSignal*)fVetos->At(i-1);
+ cout << " *AliCalcluster::GetVetoSignal* No veto signals present." << endl;
+ return 0;
}
else
{
- cout << " *AliCalcluster::GetVetoSignal* Signal number " << i
- << " out of range." << endl;
- cout << " --- First signal (if any) returned." << endl;
- return (AliSignal*)fVetos->At(0);
+ if (i>0 && i<=fNvetos)
+ {
+ return (AliSignal*)fVetos->At(i-1);
+ }
+ else
+ {
+ cout << " *AliCalcluster::GetVetoSignal* Signal number " << i << " out of range."
+ << " Nvetos = " << fNvetos << endl;
+ return 0;
+ }
+ }
+}
+///////////////////////////////////////////////////////////////////////////
+Float_t AliCalcluster::GetVetoLevel()
+{
+// Provide the confidence level of best associated veto signal.
+ Float_t cl=0;
+ Float_t clmax=0;
+ AliSignal* s=0;
+ Int_t nvalues=0;
+ if (fVetos)
+ {
+ for (Int_t i=0; i<fNvetos; i++)
+ {
+ s=((AliSignal*)fVetos->At(i));
+ if (s)
+ {
+ nvalues=s->GetNvalues();
+ cl=s->GetSignal(nvalues);
+ if (cl>clmax) clmax=cl;
+ }
+ }
+ }
+ return clmax;
+}
+///////////////////////////////////////////////////////////////////////////
+Int_t AliCalcluster::HasVetoHit(Double_t cl)
+{
+// Investigate if cluster has an associated veto hit with conf. level > cl.
+// Returns 1 if there is such an associated veto hit, otherwise returns 0.
+// Note : This function is faster than GetVetoLevel().
+ AliSignal* s=0;
+ Int_t nvalues=0;
+ if (fVetos)
+ {
+ for (Int_t i=0; i<fNvetos; i++)
+ {
+ s=((AliSignal*)fVetos->At(i));
+ if (s)
+ {
+ nvalues=s->GetNvalues();
+ if (s->GetSignal(nvalues) > cl) return 1;
+ }
+ }
}
+ return 0;
}
///////////////////////////////////////////////////////////////////////////
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff