1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 // Static function member which can be used in standalone cases
17 // especially as utils for AliTPCCosmicTrackfit
19 // detailed description can be found inside individual function
21 // grep "exitreport" in output log to check abnormal termination
24 // lu@physi.uni-heidelberg.de
28 #ifndef ALITPCCOSMICUTILS_H
29 #define ALITPCCOSMICUTILS_H
31 class AliTPCCosmicUtils
34 static AliTPCseed * GetTPCseed(const AliESDtrack *esdtrack);
36 static AliExternalTrackParam *MakeSeed(const AliTPCseed *tseed);
38 static void SingleFit(AliExternalTrackParam * trackInOld, AliExternalTrackParam * trackOutOld, const AliTPCseed *tseed, const Bool_t kinward, const Int_t rowstartshift, const Int_t rowstep, const Double_t xmin, const Double_t xmax, Int_t &nfit, Int_t &nmiss, Double_t &pchi2, Double_t &lfit, TTreeSRedirector *debugstreamer=0x0);
40 static void CombinedFit(AliExternalTrackParam *trackPars[], const AliTPCseed *seeds[], const Int_t rowstartshift, const Int_t rowstep, const Double_t xmin, const Double_t xmax, Int_t &nfit, Int_t &nmiss, Double_t &pchi2, Double_t &lfit, Double_t &lfit, Double_t &vtxD, TTreeSRedirector *debugstreamer=0x0);
42 static void DrawTracks(AliESDtrack *esdtrks[], const TString tag, const TString outputformat="png");
43 static void DrawSeeds(const AliTPCseed * seeds[], const TString tag, const TString outputformat="png");
44 static void PrintTrackParam(const Int_t id, const AliExternalTrackParam * trackpar, const char *tag="");
45 static Bool_t RotateSafe(AliExternalTrackParam *trackPar, const Double_t aa);
46 static Double_t AngleInRange(Double_t phi);
47 static Double_t Point2LineDist(const TVector3 p0, const TVector3 l1, const TVector3 l2);
50 static void IniCov(AliExternalTrackParam *trackPar, const Double_t ncl);
51 static void SubCombined(AliExternalTrackParam *trackPar, const AliTPCseed *seeds[], const Int_t tk0, const Int_t tk1, const Int_t rowstartshift, const Int_t rowstep, const Double_t xmin, const Double_t xmax, const Double_t eloss, Int_t &nfit, Int_t &nmiss, Double_t &pchi2, Double_t &lfit, Double_t &lfit, Double_t &vtxD, TTreeSRedirector *debugstreamer=0x0);
52 static void FitKernel(AliExternalTrackParam *trackPar, const AliTPCseed *tseed, const Int_t rowstart, const Int_t rowstop, const Int_t drow, const Double_t xmin, const Double_t xmax, const Double_t eloss, Int_t &ksite, Int_t &nfit, Int_t &nmiss, Double_t &pchi2, TVector3 &gposStart, TVector3 &gposStop, TTreeSRedirector *debugstreamer, const Bool_t kinicov);
54 static const Int_t fgkNRow = 159; //number of pad rows
55 static const Int_t fgkNclsMin = 40; //minimum requirement of number of TPC cluster
56 static const Int_t fgkXMin = 80; //minimum x (tracking system) to use in propagation
57 static const Double_t fgkMass = 0.105658; //muon mass
58 static const Int_t fgkNiter = 2; //number of iteration in SingleFit and CombinedFit, 1 is not enough, 3 is the same as 2