/*
$Log$
+Revision 1.9 2004/02/03 16:45:20 morsch
+Unique name for functions (TF1).
+
+Revision 1.8 2004/01/27 18:02:38 hristov
+Removing some warning (Sun)
+
+Revision 1.7 2003/11/13 14:21:57 morsch
+Coding Rule violation corrections.
+
+Revision 1.6 2003/08/12 15:16:25 morsch
+Saver initialisation of fFitp array. (Lenaic COUEDEL)
+
+Revision 1.5 2003/08/05 16:14:20 morsch
+Some problems with too big fluctuations corrected. (A. de Falco)
+
+Revision 1.2 2003/01/08 10:29:33 morsch
+Path to data file changed.
+
Revision 1.1 2003/01/06 10:13:33 morsch
First commit.
*/
+//-------------------------------------------------------------------------
+// Class AliMUONFastTracking
+//
+// Manager for the fast simulation of tracking in the muon spectrometer
+// This class reads the lookup tables containing the parameterization
+// of the deltap, deltatheta, deltaphi for different background levels
+// and provides the related smeared parameters.
+// Used by AliFastMuonTrackingEff, AliFastMuonTrackingAcc,
+// AliFastMuonTrackingRes.
+//-------------------------------------------------------------------------
+
#include "AliMUONFastTracking.h"
#include "AliMUONFastTrackingEntry.h"
-#include <TMatrixD.h>
#include <TSpline.h>
#include <TFile.h>
-#include <TH1.h>
#include <TH3.h>
#include <TF1.h>
#include <TRandom.h>
ClassImp(AliMUONFastTracking)
+
AliMUONFastTracking* AliMUONFastTracking::fgMUONFastTracking=NULL;
static Double_t FitP(Double_t *x, Double_t *par){
Double_t fasymm = TMath::Exp(-0.5 * dx * dx / (sigma * sigma));
Double_t sigma2 = par[1] * par[5];
Double_t fgauss = TMath::Exp(-0.5 * dx2 * dx2 / (sigma2 * sigma2));
- return TMath::Abs(fasymm + par[3] * fgauss);
+ Double_t value = fasymm + par[3] * fgauss;
+ return TMath::Abs(value);
}
+AliMUONFastTracking::AliMUONFastTracking(const AliMUONFastTracking & ft):TObject()
+{
+// Copy constructor
+ ft.Copy(*this);
+}
+
+
AliMUONFastTracking* AliMUONFastTracking::Instance()
{
// Set random number generator
AliMUONFastTracking::AliMUONFastTracking()
{
-// SetBackground();
-
+//
+// constructor
+//
+ for (Int_t i = 0; i<20;i++) {
+ for (Int_t j = 0; j<20; j++) {
+ for (Int_t k = 0; k<20; k++) {
+ fFitp[i][j][k] = 0x0;
+ }
+ }
+ }
+
+ fClusterFinder = kOld;
fPrintLevel = 1;
// read binning; temporarily put by hand
Float_t pmin = 0, pmax = 200;
}
char filename [100];
- sprintf (filename,"$(ALICE_ROOT)/FASTSIM/data/MUONtrackLUT.root");
+ if (fClusterFinder==kOld) sprintf (filename,"$(ALICE_ROOT)/FASTSIM/data/MUONtrackLUT.root");
+ else sprintf (filename,"$(ALICE_ROOT)/FASTSIM/data/MUONtrackLUT-AZ.root");
+
TFile *file = new TFile(filename);
ReadLUT(file);
SetBackground(bkg);
- UseSpline(1);
- fFitp = new TF1("fit1",FitP,-20.,20.,6);
- fFitp->SetNpx(200);
+ UseSpline(0);
}
void AliMUONFastTracking::ReadLUT(TFile* file)
{
+ //
+ // read the lookup tables from file
+ //
TH3F *heff[5][3], *hacc[5][3], *hmeanp, *hsigmap, *hsigma1p, *hchi2p;
TH3F *hnormg2, *hmeang2, *hsigmag2, *hmeantheta, *hsigmatheta, *hchi2theta;
TH3F *hmeanphi, *hsigmaphi, *hchi2phi;
char tag[40], tag2[40];
- const Float_t bkg[4] = {0, 0.5, 1, 2};
+ printf ("Reading parameters from LUT file %s...\n",file->GetName());
+
+ const Float_t kBkg[4] = {0, 0.5, 1, 2};
for (Int_t ibkg=0; ibkg<4; ibkg++) {
- sprintf (tag,"BKG%g",bkg[ibkg]);
+ sprintf (tag,"BKG%g",kBkg[ibkg]);
file->cd(tag);
for (Int_t isplp = 0; isplp<kSplitP; isplp++) {
for (Int_t ispltheta = 0; ispltheta<kSplitTheta; ispltheta++) {
hsigmaphi = (TH3F*)gDirectory->Get("hsigmaphi");
hchi2phi = (TH3F*)gDirectory->Get("hchi2phi");
- printf ("Reading parameters from LUT file %s...\n",file->GetName());
for (Int_t ip=0; ip<fNbinp ;ip++) {
for (Int_t itheta=0; itheta<fNbintheta ;itheta++) {
for (Int_t iphi=0; iphi<fNbinphi ;iphi++) {
void AliMUONFastTracking::GetBinning(Int_t &nbinp, Float_t &pmin, Float_t &pmax,
Int_t &nbintheta, Float_t &thetamin,
Float_t &thetamax,
- Int_t &nbinphi, Float_t &phimin, Float_t &phimax)
+ Int_t &nbinphi, Float_t &phimin, Float_t &phimax) const
{
+ //
+ // gets the binning for the discrete parametrizations in the lookup table
+ //
nbinp = fNbinp;
pmin = fPmin;
pmax = fPmax;
void AliMUONFastTracking::GetIpIthetaIphi(Float_t p, Float_t theta, Float_t phi,
Int_t charge, Int_t &ip, Int_t &itheta,
- Int_t &iphi)
+ Int_t &iphi) const
{
+ //
+ // gets the id of the cells in the LUT for a given (p,theta,phi, charge)
+ //
if (charge < 0) phi = -phi;
ip = Int_t (( p - fPmin ) / fDeltaP);
itheta = Int_t (( theta - fThetamin ) / fDeltaTheta);
iphi = Int_t (( phi - fPhimin ) / fDeltaPhi);
- if (ip< 0) {
- printf ("Warning: ip= %d. Set to 0\n",ip);
- ip = 0;
- }
- if (ip>= fNbinp) {
- // printf ("Warning: ip = %d. Set to %d\n",ip,fNbinp-1);
- ip = fNbinp-1;
- }
- if (itheta< 0) {
- // printf ("Warning: itheta= %d. Set to 0\n",itheta);
- itheta = 0;
- }
- if (itheta>= fNbintheta) {
- // printf ("Warning: itheta = %d. Set to %d\n",itheta,fNbintheta-1);
- itheta = fNbintheta-1;
- }
- if (iphi< 0) {
- printf ("Warning: iphi= %d. Set to 0\n",iphi);
- iphi = 0;
- }
- if (iphi>= fNbinphi) {
- printf ("Warning: iphi = %d. Set to %d\n",iphi,fNbinphi-1);
- iphi = fNbinphi-1;
- }
+ if (ip< 0) ip = 0;
+ if (ip>= fNbinp) ip = fNbinp-1;
+ if (itheta< 0) itheta = 0;
+ if (itheta>= fNbintheta) itheta = fNbintheta-1;
+
+ if (iphi< 0) iphi = 0;
+ if (iphi>= fNbinphi) iphi = fNbinphi-1;
}
void AliMUONFastTracking::GetSplit(Int_t ip, Int_t itheta,
- Int_t &nSplitP, Int_t &nSplitTheta) {
+ Int_t &nSplitP, Int_t &nSplitTheta) const
+{
+ //
+ // the first cell is splitted in more bins for theta and momentum
+ // parameterizations. Get the number of divisions for the splitted bins
+ //
if (ip==0) nSplitP = 5;
else nSplitP = 2;
if (itheta==0) nSplitTheta = 3;
Float_t AliMUONFastTracking::Efficiency(Float_t p, Float_t theta,
Float_t phi, Int_t charge){
+ //
+ // gets the tracking efficiency
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
Int_t nSplitP, nSplitTheta;
Float_t AliMUONFastTracking::Acceptance(Float_t p, Float_t theta,
Float_t phi, Int_t charge){
+ //
+ // gets the geometrical acceptance
+ //
if (theta<fThetamin || theta>fThetamax) return 0;
Int_t ip=0, itheta=0, iphi=0;
}
Float_t AliMUONFastTracking::MeanP(Float_t p, Float_t theta,
- Float_t phi, Int_t charge)
+ Float_t phi, Int_t charge) const
{
+ //
+ // gets the mean value of the prec-pgen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
return fCurrentEntry[ip][itheta][iphi]->fMeanp;
}
Float_t AliMUONFastTracking::SigmaP(Float_t p, Float_t theta,
- Float_t phi, Int_t charge)
+ Float_t phi, Int_t charge) const
{
+ //
+ // gets the width of the prec-pgen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
Int_t index;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
}
Float_t AliMUONFastTracking::Sigma1P(Float_t p, Float_t theta,
- Float_t phi, Int_t charge)
+ Float_t phi, Int_t charge) const
{
+ //
+ // gets the width correction of the prec-pgen distribution (see FitP)
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
if (p>fPmax) {
}
Float_t AliMUONFastTracking::NormG2(Float_t p, Float_t theta,
- Float_t phi, Int_t charge)
+ Float_t phi, Int_t charge) const
{
+ //
+ // gets the relative normalization of the background
+ // (gaussian) component in the prec-pgen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
if (p>fPmax) {
}
Float_t AliMUONFastTracking::MeanG2(Float_t p, Float_t theta,
- Float_t phi, Int_t charge)
+ Float_t phi, Int_t charge) const
{
+ //
+ // gets the mean value of the background
+ // (gaussian) component in the prec-pgen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
if (p>fPmax) {
}
Float_t AliMUONFastTracking::SigmaG2(Float_t p, Float_t theta,
- Float_t phi, Int_t charge)
+ Float_t phi, Int_t charge) const
{
+ //
+ // gets the width of the background
+ // (gaussian) component in the prec-pgen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
if (p>fPmax) {
Float_t AliMUONFastTracking::MeanTheta(Float_t p, Float_t theta,
- Float_t phi, Int_t charge)
+ Float_t phi, Int_t charge) const
{
+ //
+ // gets the mean value of the thetarec-thetagen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
return fCurrentEntry[ip][itheta][iphi]->fMeantheta;
}
-Float_t AliMUONFastTracking::SigmaTheta(Float_t p, Float_t theta,
- Float_t phi, Int_t charge){
+Float_t AliMUONFastTracking::SigmaTheta(Float_t p, Float_t theta,
+ Float_t phi, Int_t charge) const
+{
+ //
+ // gets the width of the thetarec-thetagen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
Int_t index;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
Float_t AliMUONFastTracking::MeanPhi(Float_t p, Float_t theta,
- Float_t phi, Int_t charge){
+ Float_t phi, Int_t charge) const
+{
+ //
+ // gets the mean value of the phirec-phigen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
return fCurrentEntry[ip][itheta][iphi]->fMeanphi;
Float_t AliMUONFastTracking::SigmaPhi(Float_t p, Float_t theta,
Float_t phi, Int_t charge){
+ //
+ // gets the width of the phirec-phigen distribution
+ //
Int_t ip=0, itheta=0, iphi=0;
Int_t index;
GetIpIthetaIphi(p,theta,phi,charge,ip,itheta,iphi);
}
void AliMUONFastTracking::SetSpline(){
+ //
+ // sets the spline functions for a smooth behaviour of the parameters
+ // when going from one cell to another
+ //
printf ("Setting spline functions...");
char splname[40];
Double_t x[20][3];
printf ("...done\n");
}
-void AliMUONFastTracking::SmearMuon(Float_t pgen, Float_t thetagen, Float_t phigen,
- Int_t charge, Float_t &psmear, Float_t &thetasmear,
- Float_t &phismear, Float_t &eff, Float_t &acc){
-
- // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- // IMPORTANT NOTICE TO THE USER
- //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- // THIS METHOD HAS BEEN REPLACED BY AliFastMuonTrackingEff::Evaluate()
- // AND WILL BE DELETED SOON
- // DO NOT USE THIS METHOD
- //
-
- printf ("AliMUONFastTracking::SmearMuon() THIS METHOD IS OBSOLETE ");
- printf ("PLEASE REFER TO AliFastMuonTrackingEff::Evaluate()\n");
- // angles are in degrees
-
- Double_t meanp = MeanP (pgen, thetagen, phigen, charge);
- Double_t sigmap = SigmaP (pgen, thetagen, phigen, charge);
- Double_t sigma1p = Sigma1P(pgen, thetagen, phigen, charge);
- Double_t normg2 = NormG2 (pgen, thetagen, phigen, charge);
- Double_t meang2 = MeanG2 (pgen, thetagen, phigen, charge);
- Double_t sigmag2 = SigmaG2(pgen, thetagen, phigen, charge);
-
- printf ("fBkg = %g normg2 (100,5,0,1) = %g \n",fBkg,NormG2(100,5,0,1));
- printf ("fBkg = %g meang2 (100,5,0,1) = %g \n",fBkg,MeanG2(100,5,0,1));
- printf ("fBkg = %g sigmag2 (100,5,0,1) = %g \n",fBkg,SigmaG2(100,5,0,1));
- Int_t ip,itheta,iphi;
- GetIpIthetaIphi(pgen, thetagen, phigen, charge, ip, itheta, iphi);
- if (sigmap == 0) {
- if (fPrintLevel>0) {
- printf ("WARNING!!! sigmap=0: ");
- printf ("ip= %d itheta = %d iphi = %d ", ip, itheta, iphi);
- printf ("p= %f theta = %f phi = %f\n", pgen, thetagen, phigen);
- }
- }
-
- if (fPrintLevel>1) printf ("setting parameters: meanp = %f sigmap = %f sigma1p = %f normg2 = %f meang2 = %f sigmag2 = %f \n",meanp,sigmap,sigma1p,normg2,meang2,sigmag2);
- fFitp->SetParameters(meanp,sigmap,sigma1p,normg2,meang2,sigmag2);
-
- Double_t meantheta = MeanTheta (pgen, thetagen, phigen, charge);
- Double_t sigmatheta = SigmaTheta(pgen, thetagen, phigen, charge);
- Double_t meanphi = MeanPhi (pgen, thetagen, phigen, charge);
- Double_t sigmaphi = SigmaPhi (pgen, thetagen, phigen, charge);
-
- // components different from ip=0 have the RMS bigger than mean
- Float_t ptp[3] = { 1.219576,-0.354764,-0.690117 };
- Float_t ptph[3] = { 0.977522, 0.016269, 0.023158 };
- Float_t pphp[3] = { 1.303256,-0.464847,-0.869322 };
- psmear = pgen + fFitp->GetRandom();
- Float_t dp = psmear - pgen;
- if (ip==0) sigmaphi *= pphp[0] + pphp[1] * dp + pphp[2] * dp*dp;
- phismear = phigen + gRandom->Gaus(meanphi, sigmaphi);
- Float_t dphi = phismear - phigen;
-
- if (ip==0) sigmatheta *= ptp[0] + ptp[1] * dp + ptp[2] * dp*dp;
- if (ip==0) sigmatheta *= ptph[0] + ptph[1] * dphi + ptph[2] * dphi*dphi;
- thetasmear = thetagen + gRandom->Gaus(meantheta,sigmatheta);
- eff = Efficiency(pgen, thetagen, phigen, charge);
- acc = Acceptance(pgen, thetagen, phigen, charge);
-}
-
void AliMUONFastTracking::SetBackground(Float_t bkg){
+ //
// linear interpolation of the parameters in the LUT between 2 values where
// the background has been actually calculated
-
+ //
if (bkg>2) printf ("WARNING: unsafe extrapolation!\n");
fBkg = bkg;
- Float_t BKG[4] = {0, 0.5, 1, 2}; // bkg values for which LUT is calculated
+ Float_t bkgLevel[4] = {0, 0.5, 1, 2}; // bkg values for which LUT is calculated
Int_t ibkg;
- for (ibkg=0; ibkg<4; ibkg++) if ( bkg < BKG[ibkg]) break;
+ for (ibkg=0; ibkg<4; ibkg++) if ( bkg < bkgLevel[ibkg]) break;
if (ibkg == 4) ibkg--;
if (ibkg == 0) ibkg++;
- Float_t x0 = BKG[ibkg-1];
- Float_t x1 = BKG[ibkg];
+ Float_t x0 = bkgLevel[ibkg-1];
+ Float_t x1 = bkgLevel[ibkg];
Float_t x = (bkg - x0) / (x1 - x0);
Float_t y0, y1;
SetSpline();
}
+TF1* AliMUONFastTracking::GetFitP(Int_t ip,Int_t itheta,Int_t iphi) {
+ // gets the correct prec-pgen distribution for a given LUT cell
+ if (!fFitp[ip][itheta][iphi]) {
+ char name[256];
+ sprintf(name, "fit_%d_%d_%d", ip, itheta, iphi);
+ fFitp[ip][itheta][iphi] = new TF1(name ,FitP,-20.,20.,6);
+ fFitp[ip][itheta][iphi]->SetNpx(500);
+ fFitp[ip][itheta][iphi]->SetParameters(0.,0.,0.,0.,0.,0.);
+ }
+ return fFitp[ip][itheta][iphi];
+}
+AliMUONFastTracking& AliMUONFastTracking::operator=(const AliMUONFastTracking& rhs)
+{
+// Assignment operator
+ rhs.Copy(*this);
+ return *this;
+}
- // to guarantee a safe extrapolation for sigmag2 to 0<bkg<0.5, let's fit
- // with a straight line sigmag2 vs bkg for bkg=0.5, 1 and 2, and put the
- // sigma2(BKG=0) as the extrapolation of this fit
+void AliMUONFastTracking::Copy(TObject&) const
+{
+ //
+ // Copy
+ //
+ Fatal("Copy","Not implemented!\n");
+}
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