/**************************************************************************
* 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. *
**************************************************************************/
/* $Id$ */
//_________________________________________________________________________
// RecPoint implementation for PHOS-EMC
// An EmcRecPoint is a cluster of digits
//
//*-- Author: Dmitri Peressounko (RRC KI & SUBATECH)
// --- ROOT system ---
#include "TPad.h"
#include "TH2.h"
#include "TMath.h"
#include "TCanvas.h"
// --- Standard library ---
#include <iostream>
// --- AliRoot header files ---
#include "AliPHOSGeometry.h"
#include "AliPHOSEmcRecPoint.h"
#include "AliRun.h"
ClassImp(AliPHOSEmcRecPoint)
//____________________________________________________________________________
AliPHOSEmcRecPoint::AliPHOSEmcRecPoint(Float_t W0, Float_t LocMaxCut)
: AliPHOSRecPoint()
{
// ctor
fMulDigit = 0 ;
fAmp = 0. ;
fEnergyList = new Float_t[fMaxDigit];
AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
fDelta = phosgeom->GetCrystalSize(0) ;
fW0 = W0 ;
fLocMaxCut = LocMaxCut ;
fLocPos.SetX(1000000.) ; //Local position should be evaluated
}
//____________________________________________________________________________
void AliPHOSEmcRecPoint::AddDigit(AliDigitNew & digit, Float_t Energy)
{
// Adds a digit to the RecPoint
// and accumulates the total amplitude and the multiplicity
if ( fMulDigit >= fMaxDigit ) { // increase the size of the lists
fMaxDigit*=2 ;
int * tempo = new ( int[fMaxDigit] ) ;
Float_t * tempoE = new ( Float_t[fMaxDigit] ) ;
Int_t index ;
for ( index = 0 ; index < fMulDigit ; index++ ){
tempo[index] = fDigitsList[index] ;
tempoE[index] = fEnergyList[index] ;
}
delete [] fDigitsList ;
fDigitsList = new ( int[fMaxDigit] ) ;
delete [] fEnergyList ;
fEnergyList = new ( Float_t[fMaxDigit] ) ;
for ( index = 0 ; index < fMulDigit ; index++ ){
fDigitsList[index] = tempo[index] ;
fEnergyList[index] = tempoE[index] ;
}
delete [] tempo ;
delete [] tempoE ;
} // if
fDigitsList[fMulDigit] = (int) &digit ;
fEnergyList[fMulDigit++] = Energy ;
fAmp += Energy ;
}
//____________________________________________________________________________
Bool_t AliPHOSEmcRecPoint::AreNeighbours(AliPHOSDigit * digit1, AliPHOSDigit * digit2 )
{
// Tells if (true) or not (false) two digits are neighbors)
Bool_t aren = kFALSE ;
AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
Int_t relid1[4] ;
phosgeom->AbsToRelNumbering(digit1->GetId(), relid1) ;
Int_t relid2[4] ;
phosgeom->AbsToRelNumbering(digit2->GetId(), relid2) ;
Int_t rowdiff = TMath::Abs( relid1[2] - relid2[2] ) ;
Int_t coldiff = TMath::Abs( relid1[3] - relid2[3] ) ;
if (( coldiff <= 1 ) && ( rowdiff <= 1 ) && (coldiff + rowdiff > 0))
aren = kTRUE ;
return aren ;
}
//____________________________________________________________________________
Int_t AliPHOSEmcRecPoint::Compare(TObject * obj)
{
// Compares two RecPoints according to their position in the PHOS modules
Int_t rv ;
AliPHOSEmcRecPoint * clu = (AliPHOSEmcRecPoint *)obj ;
Int_t phosmod1 = this->GetPHOSMod() ;
Int_t phosmod2 = clu->GetPHOSMod() ;
TVector3 locpos1;
this->GetLocalPosition(locpos1) ;
TVector3 locpos2;
clu->GetLocalPosition(locpos2) ;
if(phosmod1 == phosmod2 ) {
Int_t rowdif = (Int_t)TMath::Ceil(locpos1.X()/fDelta)-(Int_t)TMath::Ceil(locpos2.X()/fDelta) ;
if (rowdif> 0)
rv = -1 ;
else if(rowdif < 0)
rv = 1 ;
else if(locpos1.Z()>locpos2.Z())
rv = -1 ;
else
rv = 1 ;
}
else {
if(phosmod1 < phosmod2 )
rv = -1 ;
else
rv = 1 ;
}
return rv ;
}
//______________________________________________________________________________
void AliPHOSEmcRecPoint::ExecuteEvent(Int_t event, Int_t px, Int_t py)
{
// Execute action corresponding to one event
// This member function is called when a AliPHOSRecPoint is clicked with the locator
//
// If Left button is clicked on AliPHOSRecPoint, the digits are switched on
// and switched off when the mouse button is released.
//
// static Int_t pxold, pyold;
static TGraph * digitgraph = 0 ;
if (!gPad->IsEditable()) return;
TH2F * histo = 0 ;
TCanvas * histocanvas ;
switch (event) {
case kButton1Down: {
AliPHOSDigit * digit ;
AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
Int_t iDigit;
Int_t relid[4] ;
Float_t xi[fMulDigit] ;
Float_t zi[fMulDigit] ;
// create the histogram for the single cluster
// 1. gets histogram boundaries
Float_t ximax = -999. ;
Float_t zimax = -999. ;
Float_t ximin = 999. ;
Float_t zimin = 999. ;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
digit = (AliPHOSDigit *) fDigitsList[iDigit];
phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
phosgeom->RelPosInModule(relid, xi[iDigit], zi[iDigit]);
if ( xi[iDigit] > ximax )
ximax = xi[iDigit] ;
if ( xi[iDigit] < ximin )
ximin = xi[iDigit] ;
if ( zi[iDigit] > zimax )
zimax = zi[iDigit] ;
if ( zi[iDigit] < zimin )
zimin = zi[iDigit] ;
}
ximax += phosgeom->GetCrystalSize(0) / 2. ;
zimax += phosgeom->GetCrystalSize(2) / 2. ;
ximin -= phosgeom->GetCrystalSize(0) / 2. ;
zimin -= phosgeom->GetCrystalSize(2) / 2. ;
Int_t xdim = (int)( (ximax - ximin ) / phosgeom->GetCrystalSize(0) + 0.5 ) ;
Int_t zdim = (int)( (zimax - zimin ) / phosgeom->GetCrystalSize(2) + 0.5 ) ;
// 2. gets the histogram title
Text_t title[100] ;
sprintf(title,"Energy=%1.2f GeV ; Digits ; %d ", GetEnergy(), GetDigitsMultiplicity()) ;
if (!histo) {
delete histo ;
histo = 0 ;
}
histo = new TH2F("cluster3D", title, xdim, ximin, ximax, zdim, zimin, zimax) ;
Float_t x, z ;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
digit = (AliPHOSDigit *) fDigitsList[iDigit];
phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
phosgeom->RelPosInModule(relid, x, z);
histo->Fill(x, z, fEnergyList[iDigit] ) ;
}
if (!digitgraph) {
digitgraph = new TGraph(fMulDigit,xi,zi);
digitgraph-> SetMarkerStyle(5) ;
digitgraph-> SetMarkerSize(1.) ;
digitgraph-> SetMarkerColor(1) ;
digitgraph-> Paint("P") ;
}
Print() ;
histocanvas = new TCanvas("cluser", "a single cluster", 600, 500) ;
histocanvas->Draw() ;
histo->Draw("lego1") ;
break;
}
case kButton1Up:
if (digitgraph) {
delete digitgraph ;
digitgraph = 0 ;
}
break;
}
}
//____________________________________________________________________________
Float_t AliPHOSEmcRecPoint::GetDispersion()
{
// Calculates the dispersion of the shower at the origine of the RecPoint
Float_t d = 0 ;
Float_t wtot = 0 ;
TVector3 locpos;
GetLocalPosition(locpos);
Float_t x = locpos.X() ;
Float_t z = locpos.Z() ;
AliPHOSDigit * digit ;
AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
Int_t iDigit;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
digit = (AliPHOSDigit *) fDigitsList[iDigit];
Int_t relid[4] ;
Float_t xi ;
Float_t zi ;
phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
phosgeom->RelPosInModule(relid, xi, zi);
Float_t w = TMath::Max(0.,fW0+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
d += w*((xi-x)*(xi-x) + (zi-z)*(zi-z) ) ;
wtot+=w ;
}
d /= wtot ;
return TMath::Sqrt(d) ;
}
//____________________________________________________________________________
void AliPHOSEmcRecPoint::GetElipsAxis(Float_t * lambda)
{
// Calculates the axis of the shower ellipsoid
Float_t wtot = 0. ;
Float_t x = 0.;
Float_t z = 0.;
Float_t dxx = 0.;
Float_t dzz = 0.;
Float_t dxz = 0.;
AliPHOSDigit * digit ;
AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
Int_t iDigit;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
digit = (AliPHOSDigit *) fDigitsList[iDigit];
Int_t relid[4] ;
Float_t xi ;
Float_t zi ;
phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
phosgeom->RelPosInModule(relid, xi, zi);
Float_t w = TMath::Max(0.,fW0+TMath::Log(fEnergyList[iDigit]/fAmp ) ) ;
dxx += w * xi * xi ;
x += w * xi ;
dzz += w * zi * zi ;
z += w * zi ;
dxz += w * xi * zi ;
wtot += w ;
}
dxx /= wtot ;
x /= wtot ;
dxx -= x * x ;
dzz /= wtot ;
z /= wtot ;
dzz -= z * z ;
dxz /= wtot ;
dxz -= x * z ;
lambda[0] = TMath::Sqrt( 0.5 * (dxx + dzz) + TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ) ;
lambda[1] = TMath::Sqrt( 0.5 * (dxx + dzz) - TMath::Sqrt( 0.25 * (dxx - dzz) * (dxx - dzz) + dxz * dxz ) ) ;
}
//____________________________________________________________________________
void AliPHOSEmcRecPoint::GetLocalPosition(TVector3 &LPos)
{
// Calculates the center of gravity in the local PHOS-module coordinates
if( fLocPos.X() < 1000000.) { // already evaluated
LPos = fLocPos ;
return ;
}
Float_t wtot = 0. ;
Int_t relid[4] ;
Float_t x = 0. ;
Float_t z = 0. ;
AliPHOSDigit * digit ;
AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
Int_t iDigit;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
digit = (AliPHOSDigit *) fDigitsList[iDigit];
Float_t xi ;
Float_t zi ;
phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
phosgeom->RelPosInModule(relid, xi, zi);
Float_t w = TMath::Max( 0., fW0 + TMath::Log( fEnergyList[iDigit] / fAmp ) ) ;
x += xi * w ;
z += zi * w ;
wtot += w ;
}
x /= wtot ;
z /= wtot ;
fLocPos.SetX(x) ;
fLocPos.SetY(0.) ;
fLocPos.SetZ(z) ;
LPos = fLocPos ;
}
//____________________________________________________________________________
Float_t AliPHOSEmcRecPoint::GetMaximalEnergy(void)
{
// Finds the maximum energy in the cluster
Float_t menergy = 0. ;
Int_t iDigit;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
if(fEnergyList[iDigit] > menergy)
menergy = fEnergyList[iDigit] ;
}
return menergy ;
}
//____________________________________________________________________________
Int_t AliPHOSEmcRecPoint::GetMultiplicityAtLevel(Float_t H)
{
// Calculates the multiplicity of digits with energy larger than H*energy
Int_t multipl = 0 ;
Int_t iDigit ;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
if(fEnergyList[iDigit] > H * fAmp)
multipl++ ;
}
return multipl ;
}
//____________________________________________________________________________
Int_t AliPHOSEmcRecPoint::GetNumberOfLocalMax(Int_t * maxAt, Float_t * maxAtEnergy)
{
// Calculates the number of local maxima in the cluster using fLocalMaxCut as the minimum
// energy difference between two local maxima
AliPHOSDigit * digit ;
AliPHOSDigit * digitN ;
Int_t iDigitN ;
Int_t iDigit ;
for(iDigit = 0; iDigit < fMulDigit; iDigit++){
maxAt[iDigit] = fDigitsList[iDigit] ;
}
for(iDigit = 0 ; iDigit < fMulDigit; iDigit++) {
if(maxAt[iDigit] != -1) {
digit = (AliPHOSDigit *) maxAt[iDigit] ;
for(iDigitN = 0; iDigitN < fMulDigit; iDigitN++) {
digitN = (AliPHOSDigit *) fDigitsList[iDigitN] ;
if ( AreNeighbours(digit, digitN) ) {
if (fEnergyList[iDigit] > fEnergyList[iDigitN] ) {
maxAt[iDigitN] = -1 ;
// but may be digit too is not local max ?
if(fEnergyList[iDigit] < fEnergyList[iDigitN] + fLocMaxCut)
maxAt[iDigit] = -1 ;
}
else {
maxAt[iDigit] = -1 ;
// but may be digitN too is not local max ?
if(fEnergyList[iDigit] > fEnergyList[iDigitN] - fLocMaxCut)
maxAt[iDigitN] = -1 ;
}
} // if Areneighbours
} // while digitN
} // slot not empty
} // while digit
iDigitN = 0 ;
for(iDigit = 0; iDigit < fMulDigit; iDigit++) {
if(maxAt[iDigit] != -1){
maxAt[iDigitN] = maxAt[iDigit] ;
maxAtEnergy[iDigitN] = fEnergyList[iDigit] ;
iDigitN++ ;
}
}
return iDigitN ;
}
// //____________________________________________________________________________
// AliPHOSEmcRecPoint& AliPHOSEmcRecPoint::operator = (AliPHOSEmcRecPoint Clu)
// {
// int * dl = Clu.GetDigitsList() ;
// if(fDigitsList)
// delete fDigitsList ;
// AliPHOSDigit * digit ;
// Int_t iDigit;
// for(iDigit=0; iDigit<fMulDigit; iDigit++) {
// digit = (AliPHOSDigit *) dl[iDigit];
// AddDigit(*digit) ;
// }
// fAmp = Clu.GetTotalEnergy() ;
// fGeom = Clu.GetGeom() ;
// TVector3 locpos;
// Clu.GetLocalPosition(locpos) ;
// fLocPos = locpos;
// fMulDigit = Clu.GetMultiplicity() ;
// fMaxDigit = Clu.GetMaximumMultiplicity() ;
// fPHOSMod = Clu.GetPHOSMod() ;
// fW0 = Clu.GetLogWeightCut() ;
// fDelta = Clu.GetDelta() ;
// fLocMaxCut = Clu.GetLocMaxCut() ;
// delete dl ;
// return *this ;
// }
//____________________________________________________________________________
void AliPHOSEmcRecPoint::Print(Option_t * option)
{
// Print the list of digits belonging to the cluster
cout << "AliPHOSEmcRecPoint: " << endl ;
AliPHOSDigit * digit ;
Int_t iDigit;
AliPHOSGeometry * phosgeom = (AliPHOSGeometry *) fGeom ;
Float_t xi ;
Float_t zi ;
Int_t relid[4] ;
for(iDigit=0; iDigit<fMulDigit; iDigit++) {
digit = (AliPHOSDigit *) fDigitsList[iDigit];
phosgeom->AbsToRelNumbering(digit->GetId(), relid) ;
phosgeom->RelPosInModule(relid, xi, zi);
cout << " Id = " << digit->GetId() ;
cout << " module = " << relid[0] ;
cout << " x = " << xi ;
cout << " z = " << zi ;
cout << " Energy = " << fEnergyList[iDigit] << endl ;
}
cout << " Multiplicity = " << fMulDigit << endl ;
cout << " Cluster Energy = " << fAmp << endl ;
}
//______________________________________________________________________________
void AliPHOSEmcRecPoint::Streamer(TBuffer &R__b)
{
// Stream an object of class AliPHOSEmcRecPoint.
// Needed because of the array fEnergyList
if (R__b.IsReading()) {
Version_t R__v = R__b.ReadVersion(); if (R__v) { }
AliPHOSRecPoint::Streamer(R__b);
R__b >> fDelta;
R__b >> fLocMaxCut;
R__b.ReadArray(fEnergyList);
R__b >> fW0;
} else {
R__b.WriteVersion(AliPHOSEmcRecPoint::IsA());
AliPHOSRecPoint::Streamer(R__b);
R__b << fDelta;
R__b << fLocMaxCut;
R__b.WriteArray(fEnergyList, GetMaximumDigitMultiplicity() );
R__b << fW0;
}
}
ROOT page - Class index - Top of the page
This page has been automatically generated. If you have any comments or suggestions about the page layout send a mail to ROOT support, or contact the developers with any questions or problems regarding ROOT.