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121a60bd | 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 | // // | |
20 | // class for ITS reconstruction // | |
21 | // // | |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
e62c1aea | 24 | #include "Riostream.h" |
121a60bd | 25 | #include "AliITSReconstructor.h" |
00a7cc50 | 26 | #include "AliRun.h" |
121a60bd | 27 | #include "AliRunLoader.h" |
113c12f1 | 28 | #include "AliRawReader.h" |
00a7cc50 | 29 | #include "AliITSDetTypeRec.h" |
7d62fb64 | 30 | #include "AliITSLoader.h" |
e43c066c | 31 | #include "AliITStrackerMI.h" |
121a60bd | 32 | #include "AliITStrackerSA.h" |
33 | #include "AliITSVertexerIons.h" | |
34 | #include "AliITSVertexerFast.h" | |
35 | #include "AliITSVertexerPPZ.h" | |
36 | #include "AliITSVertexerZ.h" | |
37 | #include "AliESD.h" | |
38 | #include "AliITSpidESD.h" | |
e62c1aea | 39 | #include "AliITSpidESD1.h" |
40 | #include "AliITSpidESD2.h" | |
121a60bd | 41 | #include "AliV0vertexer.h" |
42 | #include "AliCascadeVertexer.h" | |
023ae34b | 43 | #include "AliITSInitGeometry.h" |
121a60bd | 44 | |
45 | ClassImp(AliITSReconstructor) | |
46 | ||
e62c1aea | 47 | //___________________________________________________________________________ |
48 | AliITSReconstructor::AliITSReconstructor() : AliReconstructor(){ | |
49 | // Default constructor | |
50 | fItsPID=0; | |
51 | } | |
52 | //___________________________________________________________________________ | |
53 | AliITSReconstructor::~AliITSReconstructor(){ | |
54 | // destructor | |
55 | delete fItsPID; | |
56 | } | |
57 | //______________________________________________________________________ | |
58 | AliITSReconstructor::AliITSReconstructor(const AliITSReconstructor &ob) :AliReconstructor(ob) { | |
59 | // Copy constructor | |
60 | // Copies are not allowed. The method is protected to avoid misuse. | |
61 | Error("AliITSpidESD2","Copy constructor not allowed\n"); | |
62 | } | |
63 | ||
64 | //______________________________________________________________________ | |
65 | AliITSReconstructor& AliITSReconstructor::operator=(const AliITSReconstructor& /* ob */){ | |
66 | // Assignment operator | |
67 | // Assignment is not allowed. The method is protected to avoid misuse. | |
68 | Error("= operator","Assignment operator not allowed\n"); | |
69 | return *this; | |
70 | } | |
023ae34b | 71 | //______________________________________________________________________ |
72 | void AliITSReconstructor::Init(AliRunLoader *runLoader){ | |
73 | // Initalize this constructor bet getting/creating the objects | |
74 | // nesseary for a proper ITS reconstruction. | |
75 | // Inputs: | |
76 | // AliRunLoader *runLoader Pointer to the run loader to allow | |
77 | // the getting of files/folders data | |
78 | // needed to do reconstruction | |
79 | // Output: | |
80 | // none. | |
81 | // Return: | |
82 | // none. | |
00a7cc50 | 83 | |
023ae34b | 84 | AliITSInitGeometry *initgeom = new AliITSInitGeometry("AliITSvPPRasymmFMD", |
85 | 2); | |
86 | AliITSgeom *geom = initgeom->CreateAliITSgeom(); | |
87 | delete initgeom; // once created, do not need initgeom any more. | |
88 | AliITSLoader* loader = static_cast<AliITSLoader*> | |
89 | (runLoader->GetLoader("ITSLoader")); | |
90 | if (!loader) { | |
91 | Error("Init", "ITS loader not found"); | |
92 | return; | |
93 | } | |
94 | loader->SetITSgeom(geom); | |
95 | return; | |
96 | } | |
121a60bd | 97 | //_____________________________________________________________________________ |
98 | void AliITSReconstructor::Reconstruct(AliRunLoader* runLoader) const | |
99 | { | |
100 | // reconstruct clusters | |
101 | ||
7d62fb64 | 102 | |
8e50d897 | 103 | AliITSLoader* loader = static_cast<AliITSLoader*>(runLoader->GetLoader("ITSLoader")); |
121a60bd | 104 | if (!loader) { |
105 | Error("Reconstruct", "ITS loader not found"); | |
106 | return; | |
107 | } | |
8e50d897 | 108 | AliITSDetTypeRec* rec = new AliITSDetTypeRec(loader); |
00a7cc50 | 109 | rec->SetDefaults(); |
110 | ||
121a60bd | 111 | loader->LoadRecPoints("recreate"); |
112 | loader->LoadDigits("read"); | |
113 | runLoader->LoadKinematics(); | |
00a7cc50 | 114 | TString option = GetOption(); |
115 | Bool_t clusfinder=kTRUE; // Default: V2 cluster finder | |
116 | if(option.Contains("OrigCF"))clusfinder=kFALSE; | |
121a60bd | 117 | |
121a60bd | 118 | Int_t nEvents = runLoader->GetNumberOfEvents(); |
119 | ||
120 | for (Int_t iEvent = 0; iEvent < nEvents; iEvent++) { | |
121 | runLoader->GetEvent(iEvent); | |
00a7cc50 | 122 | if(loader->TreeR()==0x0) loader->MakeTree("R"); |
123 | rec->MakeBranch("R"); | |
124 | rec->SetTreeAddress(); | |
125 | rec->DigitsToRecPoints(iEvent,0,"All",clusfinder); | |
121a60bd | 126 | } |
127 | ||
128 | loader->UnloadRecPoints(); | |
129 | loader->UnloadDigits(); | |
130 | runLoader->UnloadKinematics(); | |
131 | } | |
132 | ||
00a7cc50 | 133 | //_________________________________________________________________ |
134 | void AliITSReconstructor::Reconstruct(AliRunLoader* runLoader, | |
135 | AliRawReader* rawReader) const | |
113c12f1 | 136 | { |
00a7cc50 | 137 | // reconstruct clusters |
113c12f1 | 138 | |
00a7cc50 | 139 | |
8e50d897 | 140 | AliITSLoader* loader = static_cast<AliITSLoader*>(runLoader->GetLoader("ITSLoader")); |
113c12f1 | 141 | if (!loader) { |
142 | Error("Reconstruct", "ITS loader not found"); | |
143 | return; | |
144 | } | |
00a7cc50 | 145 | |
8e50d897 | 146 | AliITSDetTypeRec* rec = new AliITSDetTypeRec(loader); |
00a7cc50 | 147 | rec->SetDefaults(); |
148 | rec->SetDefaultClusterFindersV2(kTRUE); | |
113c12f1 | 149 | |
00a7cc50 | 150 | loader->LoadRecPoints("recreate"); |
113c12f1 | 151 | |
152 | Int_t iEvent = 0; | |
113c12f1 | 153 | |
00a7cc50 | 154 | while(rawReader->NextEvent()) { |
155 | runLoader->GetEvent(iEvent++); | |
156 | if(loader->TreeR()==0x0) loader->MakeTree("R"); | |
157 | rec->DigitsToRecPoints(rawReader); | |
113c12f1 | 158 | } |
159 | ||
160 | loader->UnloadRecPoints(); | |
161 | } | |
162 | ||
121a60bd | 163 | //_____________________________________________________________________________ |
e62c1aea | 164 | AliTracker* AliITSReconstructor::CreateTracker(AliRunLoader* runLoader)const |
121a60bd | 165 | { |
166 | // create a ITS tracker | |
167 | ||
7d62fb64 | 168 | |
121a60bd | 169 | AliITSgeom* geom = GetITSgeom(runLoader); |
e43c066c | 170 | TString selectedTracker = GetOption(); |
e62c1aea | 171 | AliTracker* tracker; |
172 | if (selectedTracker.Contains("MI")) { | |
173 | tracker = new AliITStrackerMI(geom); | |
174 | } | |
175 | else { | |
176 | tracker = new AliITStrackerSA(geom); // inherits from AliITStrackerMI | |
177 | } | |
7d62fb64 | 178 | |
e62c1aea | 179 | TString selectedPIDmethod = GetOption(); |
180 | AliITSLoader *loader = (AliITSLoader*)runLoader->GetLoader("ITSLoader"); | |
181 | if (!loader) { | |
182 | Error("CreateTracker", "ITS loader not found"); | |
183 | } | |
184 | if(selectedPIDmethod.Contains("LandauFitPID")){ | |
185 | loader->AdoptITSpid(new AliITSpidESD2((AliITStrackerMI*)tracker,loader)); | |
186 | } | |
187 | else{ | |
188 | Double_t parITS[] = {34., 0.15, 10.}; | |
189 | loader->AdoptITSpid(new AliITSpidESD1(parITS)); | |
190 | } | |
191 | return tracker; | |
7d62fb64 | 192 | |
121a60bd | 193 | } |
194 | ||
195 | //_____________________________________________________________________________ | |
196 | AliVertexer* AliITSReconstructor::CreateVertexer(AliRunLoader* /*runLoader*/) const | |
197 | { | |
198 | // create a ITS vertexer | |
199 | ||
f4d5a8d1 | 200 | TString selectedVertexer = GetOption(); |
121a60bd | 201 | if(selectedVertexer.Contains("ions") || selectedVertexer.Contains("IONS")){ |
202 | Info("CreateVertexer","a AliITSVertexerIons object has been selected\n"); | |
203 | return new AliITSVertexerIons("null"); | |
204 | } | |
205 | if(selectedVertexer.Contains("smear") || selectedVertexer.Contains("SMEAR")){ | |
206 | Double_t smear[3]={0.005,0.005,0.01}; | |
207 | Info("CreateVertexer","a AliITSVertexerFast object has been selected\n"); | |
208 | return new AliITSVertexerFast(smear); | |
209 | } | |
210 | if(selectedVertexer.Contains("ppz") || selectedVertexer.Contains("PPZ")){ | |
211 | Info("CreateVertexer","a AliITSVertexerPPZ object has been selected\n"); | |
212 | return new AliITSVertexerPPZ("null"); | |
213 | } | |
214 | // by default an AliITSVertexerZ object is instatiated | |
215 | Info("CreateVertexer","a AliITSVertexerZ object has been selected\n"); | |
216 | return new AliITSVertexerZ("null"); | |
217 | } | |
218 | ||
219 | //_____________________________________________________________________________ | |
e62c1aea | 220 | void AliITSReconstructor::FillESD(AliRunLoader* runLoader, |
121a60bd | 221 | AliESD* esd) const |
222 | { | |
e62c1aea | 223 | // make PID, find V0s and cascade |
224 | AliITSLoader *loader = (AliITSLoader*)runLoader->GetLoader("ITSLoader"); | |
225 | AliITSpidESD *pidESD = 0; | |
226 | TString selectedPIDmethod = GetOption(); | |
227 | if(selectedPIDmethod.Contains("LandauFitPID")){ | |
149c4c59 | 228 | Info("FillESD","ITS LandauFitPID option has been selected\n"); |
e62c1aea | 229 | pidESD=loader->GetITSpid(); |
230 | } | |
231 | else{ | |
149c4c59 | 232 | Info("FillESD","ITS default PID\n"); |
e62c1aea | 233 | pidESD=loader->GetITSpid(); |
234 | } | |
235 | if(pidESD!=0){ | |
236 | pidESD->MakePID(esd); | |
237 | } | |
238 | else { | |
239 | Error("FillESD","!! cannot do the PID !!\n"); | |
240 | } | |
121a60bd | 241 | // V0 finding |
242 | Double_t cuts[]={33, // max. allowed chi2 | |
243 | 0.16,// min. allowed negative daughter's impact parameter | |
244 | 0.05,// min. allowed positive daughter's impact parameter | |
245 | 0.08,// max. allowed DCA between the daughter tracks | |
246 | 0.99,// max. allowed cosine of V0's pointing angle | |
247 | 0.9, // min. radius of the fiducial volume | |
248 | 2.9 // max. radius of the fiducial volume | |
249 | }; | |
250 | AliV0vertexer vtxer(cuts); | |
251 | Double_t vtx[3], cvtx[6]; | |
252 | esd->GetVertex()->GetXYZ(vtx); | |
253 | esd->GetVertex()->GetSigmaXYZ(cvtx); | |
254 | vtxer.SetVertex(vtx); | |
255 | vtxer.Tracks2V0vertices(esd); | |
256 | ||
257 | // cascade finding | |
258 | Double_t cts[]={33., // max. allowed chi2 | |
259 | 0.05, // min. allowed V0 impact parameter | |
260 | 0.008, // window around the Lambda mass | |
261 | 0.035, // min. allowed bachelor's impact parameter | |
262 | 0.10, // max. allowed DCA between a V0 and a track | |
263 | 0.9985, //max. allowed cosine of the cascade pointing angle | |
264 | 0.9, // min. radius of the fiducial volume | |
265 | 2.9 // max. radius of the fiducial volume | |
266 | }; | |
267 | AliCascadeVertexer cvtxer=AliCascadeVertexer(cts); | |
268 | cvtxer.SetVertex(vtx); | |
269 | cvtxer.V0sTracks2CascadeVertices(esd); | |
270 | } | |
271 | ||
272 | ||
273 | //_____________________________________________________________________________ | |
274 | AliITSgeom* AliITSReconstructor::GetITSgeom(AliRunLoader* runLoader) const | |
275 | { | |
276 | // get the ITS geometry | |
277 | ||
278 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); | |
279 | if (!runLoader->GetAliRun()) { | |
280 | Error("GetITSgeom", "couldn't get AliRun object"); | |
281 | return NULL; | |
282 | } | |
8e50d897 | 283 | AliITSLoader *loader = (AliITSLoader*)runLoader->GetLoader("ITSLoader"); |
284 | AliITSgeom* geom = (AliITSgeom*)loader->GetITSgeom(); | |
7d62fb64 | 285 | if(!geom){ |
286 | Error("GetITSgeom","no ITS geometry available"); | |
121a60bd | 287 | return NULL; |
288 | } | |
7d62fb64 | 289 | |
290 | return geom; | |
121a60bd | 291 | } |