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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 | //----------------------------------------------------------------------- | |
19 | // Base Hit class for all detectors | |
20 | // Contains the coordinates of the hit (single energy deposition) | |
21 | // and the number of correspondent track | |
22 | // Author: | |
23 | //----------------------------------------------------------------------- | |
24 | ||
25 | #include "TParticle.h" | |
26 | ||
27 | #include "AliHit.h" | |
28 | #include "AliRun.h" | |
29 | #include "AliMC.h" | |
30 | #include "AliStack.h" | |
31 | ||
32 | ClassImp(AliHit) | |
33 | ||
34 | //_______________________________________________________________________ | |
35 | AliHit::AliHit(): | |
36 | fTrack(0), | |
37 | fX(0), | |
38 | fY(0), | |
39 | fZ(0) | |
40 | { | |
41 | // | |
42 | // Default constructor | |
43 | // | |
44 | } | |
45 | ||
46 | //_______________________________________________________________________ | |
47 | AliHit::AliHit(Int_t shunt, Int_t track): | |
48 | fTrack(0), | |
49 | fX(0), | |
50 | fY(0), | |
51 | fZ(0) | |
52 | { | |
53 | // | |
54 | // Standard constructor | |
55 | // | |
56 | if(shunt == 1) { | |
57 | int primary = gAlice->GetMCApp()->GetPrimary(track); | |
58 | gAlice->GetMCApp()->Particle(primary)->SetBit(kKeepBit); | |
59 | fTrack=primary; | |
60 | } | |
61 | ||
62 | else if (shunt == 2) { | |
63 | // the "primary" particle associated to the hit is | |
64 | // the last track that has been flagged in the StepManager | |
65 | // used by PHOS to associate the hit with the decay gamma | |
66 | // rather than with the original pi0 | |
67 | TParticle *part; | |
68 | Int_t current; | |
69 | Int_t parent=track; | |
70 | while (1) { | |
71 | current=parent; | |
72 | part = gAlice->GetMCApp()->Particle(current); | |
73 | parent=part->GetFirstMother(); | |
74 | if(parent<0 || part->TestBit(kKeepBit)) | |
75 | break; | |
76 | } | |
77 | fTrack=current; | |
78 | } else { | |
79 | fTrack=track; | |
80 | gAlice->GetMCApp()->FlagTrack(fTrack); | |
81 | } | |
82 | } |