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4c039060 | 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 | ||
acd84897 | 16 | /* $Id$ */ |
4c039060 | 17 | |
116cbefd | 18 | //----------------------------------------------------------------------- |
19 | // | |
20 | // Base Hit class for all detectors | |
21 | // | |
22 | //----------------------------------------------------------------------- | |
23 | ||
1578254f | 24 | #include "TParticle.h" |
e2afb3b6 | 25 | |
26 | #include "AliHit.h" | |
fe4da5cc | 27 | #include "AliRun.h" |
effc3ed5 | 28 | |
fe4da5cc | 29 | ClassImp(AliHit) |
30 | ||
e2afb3b6 | 31 | //_______________________________________________________________________ |
32 | AliHit::AliHit(): | |
33 | fTrack(0), | |
34 | fX(0), | |
35 | fY(0), | |
36 | fZ(0) | |
fe4da5cc | 37 | { |
8918e700 | 38 | // |
39 | // Default constructor | |
40 | // | |
fe4da5cc | 41 | } |
42 | ||
e2afb3b6 | 43 | //_______________________________________________________________________ |
44 | AliHit::AliHit(Int_t shunt, Int_t track): | |
45 | fTrack(0), | |
46 | fX(0), | |
47 | fY(0), | |
48 | fZ(0) | |
fe4da5cc | 49 | { |
8918e700 | 50 | // |
51 | // Standard constructor | |
52 | // | |
effc3ed5 | 53 | if(shunt == 1) { |
fe4da5cc | 54 | int primary = gAlice->GetPrimary(track); |
2ab0c725 | 55 | gAlice->Particle(primary)->SetBit(kKeepBit); |
fe4da5cc | 56 | fTrack=primary; |
effc3ed5 | 57 | } |
58 | ||
59 | else if (shunt == 2) { | |
60 | // the "primary" particle associated to the hit is | |
61 | // the last track that has been flagged in the StepManager | |
62 | // used by PHOS to associate the hit with the decay gamma | |
63 | // rather than with the original pi0 | |
64 | TParticle *part; | |
65 | Int_t current; | |
66 | Int_t parent=track; | |
67 | while (1) { | |
68 | current=parent; | |
69 | part = gAlice->Particle(current); | |
70 | parent=part->GetFirstMother(); | |
71 | if(parent<0 || part->TestBit(kKeepBit)) | |
72 | break; | |
73 | } | |
74 | fTrack=current; | |
75 | } | |
76 | ||
77 | else { | |
fe4da5cc | 78 | fTrack=track; |
79 | gAlice->FlagTrack(fTrack); | |
80 | } | |
81 | } |