1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // class for ITS reconstruction //
22 ///////////////////////////////////////////////////////////////////////////////
24 #include "Riostream.h"
25 #include "AliITSReconstructor.h"
27 #include "AliRunLoader.h"
28 #include "AliRawReader.h"
29 #include "AliITSDetTypeRec.h"
30 #include "AliITSLoader.h"
31 #include "AliITStrackerMI.h"
32 #include "AliITStrackerSA.h"
33 #include "AliITSVertexerIons.h"
34 #include "AliITSVertexerFast.h"
35 #include "AliITSVertexerPPZ.h"
36 #include "AliITSVertexerZ.h"
38 #include "AliITSpidESD.h"
39 #include "AliITSpidESD1.h"
40 #include "AliITSpidESD2.h"
41 #include "AliV0vertexer.h"
42 #include "AliCascadeVertexer.h"
43 #include "AliITSInitGeometry.h"
45 ClassImp(AliITSReconstructor)
47 //___________________________________________________________________________
48 AliITSReconstructor::AliITSReconstructor() : AliReconstructor(){
49 // Default constructor
52 //___________________________________________________________________________
53 AliITSReconstructor::~AliITSReconstructor(){
57 //______________________________________________________________________
58 AliITSReconstructor::AliITSReconstructor(const AliITSReconstructor &ob) :AliReconstructor(ob) {
60 // Copies are not allowed. The method is protected to avoid misuse.
61 Error("AliITSpidESD2","Copy constructor not allowed\n");
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");
71 //______________________________________________________________________
72 void AliITSReconstructor::Init(AliRunLoader *runLoader){
73 // Initalize this constructor bet getting/creating the objects
74 // nesseary for a proper ITS reconstruction.
76 // AliRunLoader *runLoader Pointer to the run loader to allow
77 // the getting of files/folders data
78 // needed to do reconstruction
84 AliITSInitGeometry *initgeom = new AliITSInitGeometry("AliITSvPPRasymmFMD",
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"));
91 Error("Init", "ITS loader not found");
94 loader->SetITSgeom(geom);
97 //_____________________________________________________________________________
98 void AliITSReconstructor::Reconstruct(AliRunLoader* runLoader) const
100 // reconstruct clusters
103 AliITSLoader* loader = static_cast<AliITSLoader*>(runLoader->GetLoader("ITSLoader"));
105 Error("Reconstruct", "ITS loader not found");
108 AliITSDetTypeRec* rec = new AliITSDetTypeRec(loader);
111 loader->LoadRecPoints("recreate");
112 loader->LoadDigits("read");
113 runLoader->LoadKinematics();
114 TString option = GetOption();
115 Bool_t clusfinder=kTRUE; // Default: V2 cluster finder
116 if(option.Contains("OrigCF"))clusfinder=kFALSE;
118 Int_t nEvents = runLoader->GetNumberOfEvents();
120 for (Int_t iEvent = 0; iEvent < nEvents; iEvent++) {
121 runLoader->GetEvent(iEvent);
122 if(loader->TreeR()==0x0) loader->MakeTree("R");
123 rec->MakeBranch("R");
124 rec->SetTreeAddress();
125 rec->DigitsToRecPoints(iEvent,0,"All",clusfinder);
128 loader->UnloadRecPoints();
129 loader->UnloadDigits();
130 runLoader->UnloadKinematics();
133 //_________________________________________________________________
134 void AliITSReconstructor::Reconstruct(AliRunLoader* runLoader,
135 AliRawReader* rawReader) const
137 // reconstruct clusters
140 AliITSLoader* loader = static_cast<AliITSLoader*>(runLoader->GetLoader("ITSLoader"));
142 Error("Reconstruct", "ITS loader not found");
146 AliITSDetTypeRec* rec = new AliITSDetTypeRec(loader);
148 rec->SetDefaultClusterFindersV2(kTRUE);
150 loader->LoadRecPoints("recreate");
154 while(rawReader->NextEvent()) {
155 runLoader->GetEvent(iEvent++);
156 if(loader->TreeR()==0x0) loader->MakeTree("R");
157 rec->DigitsToRecPoints(rawReader);
160 loader->UnloadRecPoints();
163 //_____________________________________________________________________________
164 AliTracker* AliITSReconstructor::CreateTracker(AliRunLoader* runLoader)const
166 // create a ITS tracker
169 AliITSgeom* geom = GetITSgeom(runLoader);
170 TString selectedTracker = GetOption();
172 if (selectedTracker.Contains("MI")) {
173 tracker = new AliITStrackerMI(geom);
176 tracker = new AliITStrackerSA(geom); // inherits from AliITStrackerMI
179 TString selectedPIDmethod = GetOption();
180 AliITSLoader *loader = (AliITSLoader*)runLoader->GetLoader("ITSLoader");
182 Error("CreateTracker", "ITS loader not found");
184 if(selectedPIDmethod.Contains("LandauFitPID")){
185 loader->AdoptITSpid(new AliITSpidESD2((AliITStrackerMI*)tracker,loader));
188 Double_t parITS[] = {34., 0.15, 10.};
189 loader->AdoptITSpid(new AliITSpidESD1(parITS));
195 //_____________________________________________________________________________
196 AliVertexer* AliITSReconstructor::CreateVertexer(AliRunLoader* /*runLoader*/) const
198 // create a ITS vertexer
200 TString selectedVertexer = GetOption();
201 if(selectedVertexer.Contains("ions") || selectedVertexer.Contains("IONS")){
202 Info("CreateVertexer","a AliITSVertexerIons object has been selected\n");
203 return new AliITSVertexerIons("null");
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);
210 if(selectedVertexer.Contains("ppz") || selectedVertexer.Contains("PPZ")){
211 Info("CreateVertexer","a AliITSVertexerPPZ object has been selected\n");
212 return new AliITSVertexerPPZ("null");
214 // by default an AliITSVertexerZ object is instatiated
215 Info("CreateVertexer","a AliITSVertexerZ object has been selected\n");
216 return new AliITSVertexerZ("null");
219 //_____________________________________________________________________________
220 void AliITSReconstructor::FillESD(AliRunLoader* runLoader,
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")){
228 Info("FillESD","ITS LandauFitPID option has been selected\n");
229 pidESD=loader->GetITSpid();
232 Info("FillESD","ITS default PID\n");
233 pidESD=loader->GetITSpid();
236 pidESD->MakePID(esd);
239 Error("FillESD","!! cannot do the PID !!\n");
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
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);
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
267 AliCascadeVertexer cvtxer=AliCascadeVertexer(cts);
268 cvtxer.SetVertex(vtx);
269 cvtxer.V0sTracks2CascadeVertices(esd);
273 //_____________________________________________________________________________
274 AliITSgeom* AliITSReconstructor::GetITSgeom(AliRunLoader* runLoader) const
276 // get the ITS geometry
278 if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
279 if (!runLoader->GetAliRun()) {
280 Error("GetITSgeom", "couldn't get AliRun object");
283 AliITSLoader *loader = (AliITSLoader*)runLoader->GetLoader("ITSLoader");
284 AliITSgeom* geom = (AliITSgeom*)loader->GetITSgeom();
286 Error("GetITSgeom","no ITS geometry available");