Reduced external dependences of AliStack.
[u/mrichter/AliRoot.git] / STEER / AliHit.cxx
CommitLineData
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//-----------------------------------------------------------------------
116cbefd 19// Base Hit class for all detectors
5d8718b8 20// Contains the coordinates of the hit (single energy deposition)
21// and the number of correspondent track
22// Author:
116cbefd 23//-----------------------------------------------------------------------
24
1578254f 25#include "TParticle.h"
e2afb3b6 26
27#include "AliHit.h"
fe4da5cc 28#include "AliRun.h"
5d12ce38 29#include "AliMC.h"
effc3ed5 30
fe4da5cc 31ClassImp(AliHit)
32
e2afb3b6 33//_______________________________________________________________________
34AliHit::AliHit():
35 fTrack(0),
36 fX(0),
37 fY(0),
38 fZ(0)
fe4da5cc 39{
8918e700 40 //
41 // Default constructor
42 //
fe4da5cc 43}
44
e2afb3b6 45//_______________________________________________________________________
46AliHit::AliHit(Int_t shunt, Int_t track):
47 fTrack(0),
48 fX(0),
49 fY(0),
50 fZ(0)
fe4da5cc 51{
8918e700 52 //
53 // Standard constructor
54 //
effc3ed5 55 if(shunt == 1) {
5d12ce38 56 int primary = gAlice->GetMCApp()->GetPrimary(track);
57 gAlice->GetMCApp()->Particle(primary)->SetBit(kKeepBit);
fe4da5cc 58 fTrack=primary;
effc3ed5 59 }
60
61 else if (shunt == 2) {
62 // the "primary" particle associated to the hit is
63 // the last track that has been flagged in the StepManager
64 // used by PHOS to associate the hit with the decay gamma
65 // rather than with the original pi0
66 TParticle *part;
67 Int_t current;
68 Int_t parent=track;
69 while (1) {
70 current=parent;
5d12ce38 71 part = gAlice->GetMCApp()->Particle(current);
effc3ed5 72 parent=part->GetFirstMother();
73 if(parent<0 || part->TestBit(kKeepBit))
74 break;
75 }
76 fTrack=current;
77 }
78
79 else {
fe4da5cc 80 fTrack=track;
5d12ce38 81 gAlice->GetMCApp()->FlagTrack(fTrack);
fe4da5cc 82 }
83}