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60d3a1d3 | 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 | #include "AliMUONSDigitizerV2.h" | |
19 | ||
20 | #include "AliLog.h" | |
21 | #include "AliMUON.h" | |
22 | #include "AliMUONChamber.h" | |
23 | #include "AliMUONData.h" | |
24 | #include "AliMUONDigit.h" | |
25 | #include "AliMUONHit.h" | |
26 | #include "AliLoader.h" | |
27 | #include "AliRun.h" | |
28 | #include "AliRunLoader.h" | |
29 | #include "TObjArray.h" | |
30 | ||
ae6eeca4 | 31 | /// |
32 | /// The sdigitizer performs the transformation from hits (energy deposits by | |
33 | /// the transport code) to sdigits (equivalent of charges on pad). | |
34 | /// | |
35 | /// It does so by converting the energy deposit into a charge and then spreading | |
36 | /// this charge over several pads, according to the response function (a | |
37 | /// Mathieson distribution, basically). | |
38 | /// | |
39 | /// See also AliMUONResponseV0, which is doing the real job (in DisIntegrate | |
40 | /// method), while this sdigitizer is just "steering" the process. | |
41 | /// | |
42 | /// Please note that we do *not* merge sdigits after creation, which means | |
43 | /// that after sdigitization, a given pad can have several sdigits. This | |
44 | /// merging is taken care of later on by the digitizer(V3). | |
45 | /// | |
46 | ||
60d3a1d3 | 47 | ClassImp(AliMUONSDigitizerV2) |
48 | ||
49 | //_____________________________________________________________________________ | |
50 | AliMUONSDigitizerV2::AliMUONSDigitizerV2() | |
51 | : TTask("AliMUONSDigitizerV2","From Hits to SDigits for MUON") | |
52 | { | |
2c6e3e30 | 53 | // |
54 | // ctor. | |
55 | // | |
60d3a1d3 | 56 | } |
57 | ||
58 | //_____________________________________________________________________________ | |
59 | AliMUONSDigitizerV2::~AliMUONSDigitizerV2() | |
60 | { | |
2c6e3e30 | 61 | // |
62 | // dtor. | |
63 | // | |
60d3a1d3 | 64 | } |
65 | ||
66 | //_____________________________________________________________________________ | |
67 | void | |
68 | AliMUONSDigitizerV2::Exec(Option_t*) | |
69 | { | |
70 | // | |
71 | // Go from hits to sdigits. | |
72 | // | |
2c6e3e30 | 73 | // In the code below, apart from the loop itself (which look complicated |
74 | // but is really only a loop on each hit in the input file) the main | |
75 | // work is done in AliMUONResponse::DisIntegrate method, which converts | |
76 | // a single hit in (possibly) several sdigits. | |
77 | // | |
60d3a1d3 | 78 | |
79 | AliDebug(1,""); | |
80 | ||
81 | AliRunLoader* runLoader = AliRunLoader::GetRunLoader(); | |
82 | AliLoader* fLoader = runLoader->GetLoader("MUONLoader"); | |
83 | ||
84 | fLoader->LoadHits("READ"); | |
85 | ||
86 | AliMUONData muonData(fLoader,"MUON","MUON"); | |
87 | ||
88 | AliMUON* muon = static_cast<AliMUON*>(gAlice->GetModule("MUON")); | |
89 | ||
ae6eeca4 | 90 | Int_t nofEvents(runLoader->GetNumberOfEvents()); |
60d3a1d3 | 91 | for ( Int_t iEvent = 0; iEvent < nofEvents; ++iEvent ) |
92 | { | |
2c6e3e30 | 93 | // Loop over events. |
60d3a1d3 | 94 | TObjArray tdlist; |
95 | tdlist.SetOwner(kTRUE); | |
96 | ||
97 | AliDebug(1,Form("iEvent=%d",iEvent)); | |
98 | runLoader->GetEvent(iEvent); | |
99 | TTree* treeS = fLoader->TreeS(); | |
100 | AliDebug(1,Form("TreeS=%p",treeS)); | |
101 | if ( !treeS ) | |
102 | { | |
103 | AliDebug(1,"MakeSDigitsContainer"); | |
104 | fLoader->MakeSDigitsContainer(); | |
105 | treeS = fLoader->TreeS(); | |
106 | } | |
107 | AliDebug(1,Form("TreeS=%p",treeS)); | |
108 | muonData.MakeBranch("S"); | |
109 | muonData.SetTreeAddress("S"); | |
110 | ||
111 | muonData.SetTreeAddress("H"); | |
112 | TTree* treeH = fLoader->TreeH(); | |
113 | AliDebug(1,Form("TreeH=%p",treeH)); | |
114 | ||
115 | Long64_t nofTracks = treeH->GetEntries(); | |
116 | for ( Long64_t iTrack = 0; iTrack < nofTracks; ++iTrack ) | |
117 | { | |
2c6e3e30 | 118 | // Loop over the tracks of this event. |
60d3a1d3 | 119 | treeH->GetEvent(iTrack); |
120 | TClonesArray* hits = muonData.Hits(); | |
121 | Int_t nofHits = hits->GetEntriesFast(); | |
122 | for ( Int_t ihit = 0; ihit < nofHits; ++ihit ) | |
123 | { | |
2c6e3e30 | 124 | // Loop over the hits of this track. |
60d3a1d3 | 125 | AliMUONHit* hit = static_cast<AliMUONHit*>(hits->At(ihit)); |
126 | Int_t chamberId = hit->Chamber()-1; | |
127 | AliMUONChamber& chamber = muon->Chamber(chamberId); | |
128 | AliMUONResponse* response = chamber.ResponseModel(); | |
2c6e3e30 | 129 | |
130 | // This is the heart of this method : the dis-integration | |
131 | TList digits; | |
60d3a1d3 | 132 | response->DisIntegrate(*hit,digits); |
2c6e3e30 | 133 | |
60d3a1d3 | 134 | TIter next(&digits); |
135 | AliMUONDigit* d; | |
136 | while ( ( d = (AliMUONDigit*)next() ) ) | |
137 | { | |
2c6e3e30 | 138 | // Update some sdigit information that could not be known |
139 | // by the DisIntegrate method | |
60d3a1d3 | 140 | d->SetHit(ihit); |
2c6e3e30 | 141 | d->AddTrack(iTrack,d->Signal()); |
60d3a1d3 | 142 | tdlist.Add(d); |
143 | } | |
144 | } | |
145 | muonData.ResetHits(); | |
2c6e3e30 | 146 | } // end of loop on tracks within an event |
147 | ||
60d3a1d3 | 148 | for ( Int_t i = 0; i <= tdlist.GetLast(); ++i ) |
149 | { | |
150 | AliMUONDigit* d = (AliMUONDigit*)tdlist[i]; | |
151 | StdoutToAliDebug(1,d->Print();); | |
152 | if ( d->Signal() > 0 ) // that check would be better in the disintegrate | |
153 | // method, but to compare with old sdigitizer, it has to be there. | |
154 | { | |
155 | muonData.AddSDigit(d->DetElemId()/100-1,*d); | |
156 | } | |
157 | } | |
158 | muonData.Fill("S"); | |
159 | fLoader->WriteSDigits("OVERWRITE"); | |
2c6e3e30 | 160 | |
60d3a1d3 | 161 | muonData.ResetSDigits(); |
162 | fLoader->UnloadSDigits(); | |
163 | } // loop on events | |
164 | ||
165 | fLoader->UnloadHits(); | |
166 | } |