warning about AddDigit(Int_t*, Int_t*) fixed as Federico asked
[u/mrichter/AliRoot.git] / FMD / AliFMDReconstructor.cxx
CommitLineData
37c55dc0 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
0d0e6995 16/* $Id$ */
17
4347b38f 18//____________________________________________________________________
42403906 19//
7684b53c 20// This is a class that constructs AliFMDMult (reconstructed
21// multiplicity) from of Digits
4347b38f 22//
23// This class reads either digits from a TClonesArray or raw data from
24// a DDL file (or similar), and stores the read ADC counts in an
25// internal cache (fAdcs).
26//
27// From the cached values it then calculates the number of particles
28// that hit a region of the FMDs, as specified by the user.
29//
30// The reconstruction can be done in two ways: Either via counting the
31// number of empty strips (Poisson method), or by converting the ADC
32// signal to an energy deposition, and then dividing by the typical
33// energy loss of a particle.
34//
7684b53c 35// +---------------------+ +---------------------+
36// | AliFMDReconstructor |<>-----| AliFMDMultAlgorithm |
37// +---------------------+ +---------------------+
38// ^
39// |
40// +-----------+---------+
41// | |
42// +-------------------+ +------------------+
43// | AliFMDMultPoisson | | AliFMDMultNaiive |
44// +-------------------+ +------------------+
45//
46// AliFMDReconstructor acts as a manager class. It contains a list of
47// AliFMDMultAlgorithm objects. The call graph looks something like
48//
49//
50// +----------------------+ +----------------------+
51// | :AliFMDReconstructor | | :AliFMDMultAlgorithm |
52// +----------------------+ +----------------------+
53// | |
54// Reconstruct +-+ |
55// ------------>| | PreRun +-+
56// | |------------------------------->| |
57// | | +-+
58// | |-----+ (for each event) |
59// | | | *ProcessEvent |
60// |+-+ | |
61// || |<---+ PreEvent +-+
62// || |------------------------------>| |
63// || | +-+
64// || |-----+ |
65// || | | ProcessDigits |
66// ||+-+ | |
67// ||| |<---+ |
68// ||| | *ProcessDigit(digit) +-+
69// ||| |----------------------------->| |
70// ||| | +-+
71// ||+-+ |
72// || | PostEvent +-+
73// || |------------------------------>| |
74// || | +-+
75// |+-+ |
76// | | PostRun +-+
77// | |------------------------------->| |
78// | | +-+
79// +-+ |
80// | |
81//
4347b38f 82//
37c55dc0 83//
84//-- Authors: Evgeny Karpechev(INR) and Alla Maevsksia
4347b38f 85// Latest changes by Christian Holm Christensen <cholm@nbi.dk>
86//
87//
88//____________________________________________________________________
37c55dc0 89
56b1929b 90#include <AliLog.h> // ALILOG_H
91#include <AliRun.h> // ALIRUN_H
92#include <AliRunLoader.h> // ALIRUNLOADER_H
93#include <AliLoader.h> // ALILOADER_H
94#include <AliHeader.h> // ALIHEADER_H
95#include <AliRawReader.h> // ALIRAWREADER_H
96#include <AliGenEventHeader.h> // ALIGENEVENTHEADER_H
1a1fdef7 97#include "AliFMD.h" // ALIFMD_H
98#include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
99#include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
100#include "AliFMDDetector.h" // ALIFMDDETECTOR_H
101#include "AliFMDRing.h" // ALIFMDRING_H
56b1929b 102#include "AliFMDDigit.h" // ALIFMDDIGIT_H
103#include "AliFMDReconstructor.h" // ALIFMDRECONSTRUCTOR_H
104#include "AliFMDRawStream.h" // ALIFMDRAWSTREAM_H
105#include "AliFMDRawReader.h" // ALIFMDRAWREADER_H
106#include "AliFMDMultAlgorithm.h" // ALIFMDMULTALGORITHM_H
107#include "AliFMDMultPoisson.h" // ALIFMDMULTPOISSON_H
108#include "AliFMDMultNaiive.h" // ALIFMDMULTNAIIVE_H
a3537838 109#include "AliESD.h" // ALIESD_H
4347b38f 110
111//____________________________________________________________________
925e6570 112ClassImp(AliFMDReconstructor)
1a1fdef7 113#if 0
114 ; // This is here to keep Emacs for indenting the next line
115#endif
37c55dc0 116
4347b38f 117//____________________________________________________________________
118AliFMDReconstructor::AliFMDReconstructor()
119 : AliReconstructor(),
4347b38f 120 fPedestal(0),
e802be3e 121 fPedestalWidth(0),
122 fPedestalFactor(0)
4347b38f 123{
42403906 124 // Make a new FMD reconstructor object - default CTOR.
1a1fdef7 125 AliFMDParameters* pars = AliFMDParameters::Instance();
126 fPedestal = pars->GetPedestal();
127 fPedestalWidth = pars->GetPedestalWidth();
128 fPedestalFactor = pars->GetPedestalFactor();
129
56b1929b 130 fAlgorithms.Add(new AliFMDMultNaiive);
131 fAlgorithms.Add(new AliFMDMultPoisson);
c3907f00 132
133 TIter next(&fAlgorithms);
134 AliFMDMultAlgorithm* algorithm = 0;
135 while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
136 algorithm->PreRun(0);
4347b38f 137}
138
42403906 139
140//____________________________________________________________________
141AliFMDReconstructor::AliFMDReconstructor(const AliFMDReconstructor& other)
142 : AliReconstructor(),
42403906 143 fPedestal(0),
e802be3e 144 fPedestalWidth(0),
145 fPedestalFactor(0)
42403906 146{
56b1929b 147 // Copy constructor
1a1fdef7 148 fPedestal = other.fPedestal;
149 fPedestalWidth = other.fPedestalWidth;
150 fPedestalFactor = other.fPedestalFactor;
42403906 151
56b1929b 152
153 fAlgorithms.Delete();
154 TIter next(&(other.fAlgorithms));
155 AliFMDMultAlgorithm* algorithm = 0;
156 while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
157 fAlgorithms.Add(algorithm);
158 fAlgorithms.SetOwner(kFALSE);
42403906 159}
160
161
162//____________________________________________________________________
163AliFMDReconstructor&
164AliFMDReconstructor::operator=(const AliFMDReconstructor& other)
165{
56b1929b 166 // Assignment operator
1a1fdef7 167 fPedestal = other.fPedestal;
168 fPedestalWidth = other.fPedestalWidth;
169 fPedestalFactor = other.fPedestalFactor;
42403906 170
56b1929b 171 fAlgorithms.Delete();
172 TIter next(&(other.fAlgorithms));
173 AliFMDMultAlgorithm* algorithm = 0;
174 while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
175 fAlgorithms.Add(algorithm);
176 fAlgorithms.SetOwner(kFALSE);
177
42403906 178 return *this;
179}
56b1929b 180
181//____________________________________________________________________
182AliFMDReconstructor::~AliFMDReconstructor()
183{
184 // Destructor
185 fAlgorithms.Delete();
186}
4347b38f 187
188//____________________________________________________________________
189void
1a1fdef7 190AliFMDReconstructor::Init(AliRunLoader* runLoader)
191{
192 // Initialize the reconstructor
193 AliDebug(1, Form("Init called with runloader 0x%x", runLoader));
194 fCurrentVertex = 0;
195 if (!runLoader) {
196 Warning("Init", "No run loader");
4347b38f 197 return;
198 }
1a1fdef7 199 AliHeader* header = runLoader->GetHeader();
200 if (!header) {
201 Warning("Init", "No header");
4347b38f 202 return;
203 }
1a1fdef7 204 AliGenEventHeader* eventHeader = header->GenEventHeader();
a3537838 205 if (eventHeader) {
206 TArrayF vtx;
207 eventHeader->PrimaryVertex(vtx);
208 fCurrentVertex = vtx[2];
209 AliDebug(1, Form("Primary vertex Z coordinate for event # %d/%d is %f",
210 header->GetRun(), header->GetEvent(), fCurrentVertex));
211 Warning("Init", "no generator event header");
212 }
213 else {
214 Warning("Init", "No generator event header - "
215 "perhaps we get the vertex from ESD?");
4347b38f 216 }
a3537838 217 // Get the ESD tree
218 SetESD(new AliESD);
4347b38f 219}
dc8af42e 220
4347b38f 221//____________________________________________________________________
222void
1a1fdef7 223AliFMDReconstructor::ConvertDigits(AliRawReader* reader,
224 TTree* digitsTree) const
225{
226 // Convert Raw digits to AliFMDDigit's in a tree
227 AliFMDRawReader rawRead(reader, digitsTree);
228 // rawRead.SetSampleRate(fFMD->GetSampleRate());
229 rawRead.Exec();
4347b38f 230}
231
4347b38f 232//____________________________________________________________________
233void
1a1fdef7 234AliFMDReconstructor::Reconstruct(TTree* digitsTree,
235 TTree* clusterTree) const
4347b38f 236{
1a1fdef7 237 // Reconstruct event from digits in tree
4347b38f 238 // Get the FMD branch holding the digits.
69b696b9 239 // FIXME: The vertex may not be known yet, so we may have to move
240 // some of this to FillESD.
1a1fdef7 241 AliDebug(1, "Reconstructing from digits in a tree");
a3537838 242
243 if (fESD) {
244 const AliESDVertex* vertex = fESD->GetVertex();
245 // if (vertex) {
246 // AliDebug(1, Form("Got vertex from ESD: %f", vertex->GetZv()));
247 // fCurrentVertex = vertex->GetZv();
248 // }
249 }
1a1fdef7 250
251 TBranch *digitBranch = digitsTree->GetBranch("FMD");
4347b38f 252 if (!digitBranch) {
1a1fdef7 253 Error("Exec", "No digit branch for the FMD found");
254 return;
4347b38f 255 }
0abe7182 256 TClonesArray* digits = new TClonesArray("AliFMDDigit");
1a1fdef7 257 digitBranch->SetAddress(&digits);
4347b38f 258
e802be3e 259 TIter next(&fAlgorithms);
56b1929b 260 AliFMDMultAlgorithm* algorithm = 0;
261 while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
1a1fdef7 262 algorithm->PreEvent(clusterTree, fCurrentVertex);
263 digitBranch->GetEntry(0);
264
e802be3e 265 ProcessDigits(digits);
266
267 next.Reset();
268 algorithm = 0;
56b1929b 269 while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
e802be3e 270 algorithm->PostEvent();
1a1fdef7 271 clusterTree->Fill();
0abe7182 272 digits->Delete();
273 delete digits;
4347b38f 274}
1a1fdef7 275
4347b38f 276//____________________________________________________________________
e802be3e 277void
278AliFMDReconstructor::ProcessDigits(TClonesArray* digits) const
4347b38f 279{
69b696b9 280 // For each digit, find the pseudo rapdity, azimuthal angle, and
281 // number of corrected ADC counts, and pass it on to the algorithms
282 // used.
e802be3e 283 Int_t nDigits = digits->GetEntries();
1a1fdef7 284 AliDebug(1, Form("Got %d digits", nDigits));
e802be3e 285 for (Int_t i = 0; i < nDigits; i++) {
286 AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
1a1fdef7 287 AliFMDGeometry* fmd = AliFMDGeometry::Instance();
288 AliFMDDetector* subDetector = fmd->GetDetector(digit->Detector());
e802be3e 289 if (!subDetector) {
290 Warning("ProcessDigits", "Unknown detector: FMD%d" , digit->Detector());
291 continue;
292 }
4347b38f 293
1a1fdef7 294 AliFMDRing* ring = subDetector->GetRing(digit->Ring());
295 Float_t ringZ = subDetector->GetRingZ(digit->Ring());
e802be3e 296 if (!ring) {
297 Warning("ProcessDigits", "Unknown ring: FMD%d%c", digit->Detector(),
298 digit->Ring());
299 break;
4347b38f 300 }
301
e802be3e 302 Float_t realZ = fCurrentVertex + ringZ;
56b1929b 303 Float_t stripR = ((ring->GetHighR() - ring->GetLowR())
304 / ring->GetNStrips() * (digit->Strip() + .5)
305 + ring->GetLowR());
e802be3e 306 Float_t theta = TMath::ATan2(stripR, realZ);
307 Float_t phi = (2 * TMath::Pi() / ring->GetNSectors()
308 * (digit->Sector() + .5));
309 Float_t eta = -TMath::Log(TMath::Tan(theta / 2));
310 UShort_t counts = SubtractPedestal(digit);
4347b38f 311
e802be3e 312 TIter next(&fAlgorithms);
56b1929b 313 AliFMDMultAlgorithm* algorithm = 0;
314 while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
e802be3e 315 algorithm->ProcessDigit(digit, eta, phi, counts);
4347b38f 316 }
4347b38f 317}
4347b38f 318
1a1fdef7 319//____________________________________________________________________
320UShort_t
321AliFMDReconstructor::SubtractPedestal(AliFMDDigit* digit) const
322{
323 // Member function to subtract the pedestal from a digit
324 // This implementation does nothing, but a derived class could over
325 // load this to subtract a pedestal that was given in a database or
326 // something like that.
327
328 Int_t counts = 0;
329 Float_t ped = fPedestal + fPedestalFactor * fPedestalWidth;
330 if (digit->Count3() > 0) counts = digit->Count3();
331 else if (digit->Count2() > 0) counts = digit->Count2();
332 else counts = digit->Count1();
333 counts = TMath::Max(Int_t(counts - ped), 0);
334 return UShort_t(counts);
335}
336
4347b38f 337//____________________________________________________________________
338void
1a1fdef7 339AliFMDReconstructor::FillESD(TTree* /* digitsTree */,
340 TTree* /* clusterTree */,
341 AliESD* /* esd*/) const
121a60bd 342{
42403906 343 // nothing to be done
69b696b9 344 // FIXME: The vertex may not be known when Reconstruct is executed,
345 // so we may have to move some of that member function here.
a3537838 346#if 0
347 TClonesArray* multStrips = 0;
348 TClonesArray* multRegions = 0;
349 TTree* treeR = fmdLoader->TreeR();
350 TBranch* branchRegions = treeR->GetBranch("FMDPoisson");
351 TBranch* branchStrips = treeR->GetBranch("FMDNaiive");
352 branchRegions->SetAddress(&multRegions);
353 branchStrips->SetAddress(&multStrips);
354
355 Int_t total = 0;
356 Int_t nEntries = clusterTree->GetEntries();
357 for (Int_t entry = 0; entry < nEntries; entry++) {
358 AliDebug(5, Form("Entry # %d in cluster tree", entry));
359 treeR->GetEntry(entry);
360
361
362 Int_t nMults = multRegions->GetLast();
363 for (Int_t i = 0; i <= nMults; i++) {
364 AliFMDMultRegion* multR =
365 static_cast<AliFMDMultRegion*>(multRegions->UncheckedAt(i));
366 Int_t nParticles=multR->Particles();
367 if (i>=0 && i<=13) hEtaPoissonI1->AddBinContent(i+1,nParticles);
368 if (i>=14 && i<=27 ) hEtaPoissonI2->AddBinContent(i-13,nParticles);
369 if (i>=28 && i<=33 );
370 if (i>=34 && i<=47 ) hEtaPoissonI3->AddBinContent(48-i,nParticles);
371 if (i>=48 && i<=53) hEtaPoissonO3->AddBinContent(54-i,nParticles);
372 }
373 }
374#endif
121a60bd 375}
376
42403906 377//____________________________________________________________________
378//
379// EOF
380//