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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 | ||
fb17acd4 | 16 | /* $Header$ */ |
4c039060 | 17 | |
1578254f | 18 | #include "TParticle.h" |
e2afb3b6 | 19 | |
20 | #include "AliHit.h" | |
fe4da5cc | 21 | #include "AliRun.h" |
effc3ed5 | 22 | |
fe4da5cc | 23 | ClassImp(AliHit) |
24 | ||
e2afb3b6 | 25 | //_______________________________________________________________________ |
26 | AliHit::AliHit(): | |
27 | fTrack(0), | |
28 | fX(0), | |
29 | fY(0), | |
30 | fZ(0) | |
fe4da5cc | 31 | { |
8918e700 | 32 | // |
33 | // Default constructor | |
34 | // | |
fe4da5cc | 35 | } |
36 | ||
e2afb3b6 | 37 | //_______________________________________________________________________ |
38 | AliHit::AliHit(Int_t shunt, Int_t track): | |
39 | fTrack(0), | |
40 | fX(0), | |
41 | fY(0), | |
42 | fZ(0) | |
fe4da5cc | 43 | { |
8918e700 | 44 | // |
45 | // Standard constructor | |
46 | // | |
effc3ed5 | 47 | if(shunt == 1) { |
fe4da5cc | 48 | int primary = gAlice->GetPrimary(track); |
2ab0c725 | 49 | gAlice->Particle(primary)->SetBit(kKeepBit); |
fe4da5cc | 50 | fTrack=primary; |
effc3ed5 | 51 | } |
52 | ||
53 | else if (shunt == 2) { | |
54 | // the "primary" particle associated to the hit is | |
55 | // the last track that has been flagged in the StepManager | |
56 | // used by PHOS to associate the hit with the decay gamma | |
57 | // rather than with the original pi0 | |
58 | TParticle *part; | |
59 | Int_t current; | |
60 | Int_t parent=track; | |
61 | while (1) { | |
62 | current=parent; | |
63 | part = gAlice->Particle(current); | |
64 | parent=part->GetFirstMother(); | |
65 | if(parent<0 || part->TestBit(kKeepBit)) | |
66 | break; | |
67 | } | |
68 | fTrack=current; | |
69 | } | |
70 | ||
71 | else { | |
fe4da5cc | 72 | fTrack=track; |
73 | gAlice->FlagTrack(fTrack); | |
74 | } | |
75 | } |