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 **************************************************************************/
18 ///////////////////////////////////////////////////////
20 // Reconstructed track hit
26 ///////////////////////////////////////////////////////
28 #include "AliMUONTrackHit.h"
29 #include "AliMUONHitForRec.h"
32 ClassImp(AliMUONTrackHit) // Class implementation in ROOT context
34 //__________________________________________________________________________
35 AliMUONTrackHit::AliMUONTrackHit()
38 /// Default constructor
41 fNextTrackHitWithSameHitForRec = 0;
42 fPrevTrackHitWithSameHitForRec = 0;
44 //__________________________________________________________________________
45 AliMUONTrackHit::AliMUONTrackHit (const AliMUONTrackHit& theMUONTrackHit)
46 : TObject(theMUONTrackHit)
50 fTrackParam = theMUONTrackHit.fTrackParam;
51 fHitForRecPtr = theMUONTrackHit.fHitForRecPtr;
52 fNextTrackHitWithSameHitForRec = theMUONTrackHit.fNextTrackHitWithSameHitForRec;
53 fPrevTrackHitWithSameHitForRec = theMUONTrackHit.fPrevTrackHitWithSameHitForRec;
55 //__________________________________________________________________________
56 AliMUONTrackHit & AliMUONTrackHit::operator=(const AliMUONTrackHit& theMUONTrackHit)
58 /// Assignment operator
60 // check assignement to self
61 if (this == &theMUONTrackHit)
64 // base class assignement
65 TObject::operator=(theMUONTrackHit);
67 fTrackParam = theMUONTrackHit.fTrackParam;
68 fHitForRecPtr = theMUONTrackHit.fHitForRecPtr;
69 fNextTrackHitWithSameHitForRec = theMUONTrackHit.fNextTrackHitWithSameHitForRec;
70 fPrevTrackHitWithSameHitForRec = theMUONTrackHit.fPrevTrackHitWithSameHitForRec;
75 //__________________________________________________________________________
76 AliMUONTrackHit::AliMUONTrackHit(AliMUONHitForRec* Hit)
78 /// Constructor from the HitForRec pointed to by "Hit"
80 fHitForRecPtr = Hit; // pointer to HitForRec
81 // links from/to HitForRec
82 if (Hit->GetNTrackHits() == 0) {
83 fPrevTrackHitWithSameHitForRec = NULL;
84 Hit->SetFirstTrackHitPtr(this);
87 fPrevTrackHitWithSameHitForRec = Hit->GetLastTrackHitPtr();
88 fNextTrackHitWithSameHitForRec = NULL;
90 Hit->SetLastTrackHitPtr(this);
91 fNextTrackHitWithSameHitForRec = NULL;
92 Hit->SetNTrackHits(Hit->GetNTrackHits() + 1);
94 //__________________________________________________________________________
95 AliMUONTrackHit::~AliMUONTrackHit()
98 /// Update links between HitForRec's and TrackHit's
99 /// connected to the current TrackHit being removed.
101 AliMUONHitForRec *hit = fHitForRecPtr; // pointer to HitForRec
102 // remove current TrackHit in HitForRec links
103 if (this == hit->GetFirstTrackHitPtr())
104 hit->SetFirstTrackHitPtr(fNextTrackHitWithSameHitForRec); // if first
105 if (this == hit->GetLastTrackHitPtr())
106 hit->SetLastTrackHitPtr(fPrevTrackHitWithSameHitForRec); // if last
107 hit->SetNTrackHits(hit->GetNTrackHits() - 1); // decrement NTrackHits of hit
108 // update link to next TrackHit of previous TrackHit
109 if (fPrevTrackHitWithSameHitForRec != NULL)
110 fPrevTrackHitWithSameHitForRec->
111 SetNextTrackHitWithSameHitForRec(fNextTrackHitWithSameHitForRec);
112 // update link to previous TrackHit of next TrackHit
113 if (fNextTrackHitWithSameHitForRec)
114 fNextTrackHitWithSameHitForRec->
115 SetPrevTrackHitWithSameHitForRec(fPrevTrackHitWithSameHitForRec);
116 // to be checked thoroughly !!!!
117 // with Root counter of AliMUONTrackHit objects,
118 // with loop over all these links after the update
121 //__________________________________________________________________________
122 Int_t AliMUONTrackHit::Compare(const TObject* TrackHit) const
124 /// "Compare" function to sort with decreasing Z (spectro. muon Z <0).
125 /// Returns 1 (0, -1) if Z of current TrackHit
126 /// is smaller than (equal to, larger than) Z of TrackHit
128 if (fHitForRecPtr->GetZ() <
129 ((AliMUONTrackHit*)TrackHit)->fHitForRecPtr->GetZ()) return(1);
130 else if (fHitForRecPtr->GetZ() ==
131 ((AliMUONTrackHit*)TrackHit)->fHitForRecPtr->GetZ()) return( 0);