PWG2/FLOW/AliFlowCommon/AliFlowTrackSimple.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   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  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 // AliFlowTrackSimple:
  19 // A simple track class to the the AliFlowEventSimple for flow analysis
  20 //
  21 //
  22 // author: N. van der Kolk (kolk@nikhef.nl)
  23 // mods: Mikolaj Krzewicki (mikolaj.krzewicki@cern.ch)
  24
  25 #include "TNamed.h"
  26 #include "TParticle.h"
  27 #include "AliFlowTrackSimple.h"
  28 #include "TRandom.h"
  29
  30 ClassImp(AliFlowTrackSimple)
  31
  32 //-----------------------------------------------------------------------
  33
  34 AliFlowTrackSimple::AliFlowTrackSimple():
  35   fEta(0),
  36   fPt(0),
  37   fPhi(0),
  38   fFlowBits(0),
  39   fSubEventBits(0)
  40 {
  41   //constructor
  42 }
  43
  44 //-----------------------------------------------------------------------
  45 AliFlowTrackSimple::AliFlowTrackSimple(const TParticle* p):
  46   fEta(p->Eta()),
  47   fPt(p->Pt()),
  48   fPhi(p->Phi()),
  49   fFlowBits(0),
  50   fSubEventBits(0)
  51 {
  52   //ctor
  53 }
  54
  55 //-----------------------------------------------------------------------
  56
  57 AliFlowTrackSimple::AliFlowTrackSimple(const AliFlowTrackSimple& aTrack):
  58   TNamed(),
  59   fEta(aTrack.fEta),
  60   fPt(aTrack.fPt),
  61   fPhi(aTrack.fPhi),
  62   fFlowBits(aTrack.fFlowBits),
  63   fSubEventBits(aTrack.fSubEventBits)
  64 {
  65   //copy constructor
  66 }
  67 //-----------------------------------------------------------------------
  68
  69 AliFlowTrackSimple& AliFlowTrackSimple::operator=(const AliFlowTrackSimple& aTrack)
  70 {
  71   fEta = aTrack.fEta;
  72   fPt = aTrack.fPt;
  73   fPhi = aTrack.fPhi;
  74   fFlowBits = aTrack.fFlowBits;
  75   fSubEventBits = aTrack.fSubEventBits;
  76
  77   return *this;
  78 }
  79
  80
  81 //-----------------------------------------------------------------------
  82
  83 AliFlowTrackSimple::~AliFlowTrackSimple()
  84 {
  85   //destructor
  86
  87 }
  88
  89 //-----------------------------------------------------------------------
  90 void AliFlowTrackSimple::AddFlow( Double_t flow, Double_t reactionPlaneAngle )
  91 {
  92   //add flow wrt the eventplane
  93   fPhi -= flow*TMath::Sin(2*(fPhi-reactionPlaneAngle));
  94 }
  95
  96 //-----------------------------------------------------------------------
  97 void AliFlowTrackSimple::ResolutionPt(Double_t res)
  98 {
  99   //smear the pt by a gaussian with sigma=res
 100   fPt += gRandom->Gaus(0.,res);
 101 }