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b0a48c4d | 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: AliTRDtrackingChamber.cxx 23810 2008-02-08 09:00:27Z hristov $ */ | |
17 | ||
18 | //////////////////////////////////////////////////////////////////////////// | |
19 | // // | |
20 | // Tracking in one chamber // | |
21 | // // | |
22 | // Authors: // | |
23 | // Alex Bercuci <A.Bercuci@gsi.de> // | |
24 | // Markus Fasel <M.Fasel@gsi.de> // | |
25 | // // | |
26 | //////////////////////////////////////////////////////////////////////////// | |
27 | ||
28 | #include "AliTRDtrackingChamber.h" | |
29 | ||
30 | #include "TMath.h" | |
31 | #include "TMatrixTBase.h" | |
32 | #include <TTreeStream.h> | |
33 | ||
34 | #include "AliTRDReconstructor.h" | |
35 | #include "AliTRDrecoParam.h" | |
36 | #include "AliTRDtrackerV1.h" | |
37 | #include "AliTRDgeometry.h" | |
38 | #include "AliTRDpadPlane.h" | |
39 | #include "AliTRDcalibDB.h" | |
c79857d5 | 40 | #include "AliTRDCommonParam.h" |
b0a48c4d | 41 | #include "Cal/AliTRDCalDet.h" |
42 | #include "Cal/AliTRDCalROC.h" | |
43 | ||
44 | ClassImp(AliTRDtrackingChamber) | |
45 | ||
46 | //_______________________________________________________ | |
349f5eeb | 47 | AliTRDtrackingChamber::AliTRDtrackingChamber() |
a8276d32 | 48 | :TObject() |
349f5eeb | 49 | ,fDetector(-1) |
b0a48c4d | 50 | ,fX0(0.) |
5eb768d6 | 51 | // ,fExB(0.) |
52 | // ,fVD(0.) | |
4eb02ab1 | 53 | // ,fT0(0.) |
5eb768d6 | 54 | // ,fS2PRF(0.) |
55 | // ,fDiffL(0.) | |
56 | // ,fDiffT(0.) | |
b0a48c4d | 57 | {} |
58 | ||
59 | //_______________________________________________________ | |
60 | void AliTRDtrackingChamber::Clear(const Option_t *opt) | |
61 | { | |
fac58f00 | 62 | for(Int_t itb=0; itb<AliTRDseedV1::kNtb; itb++) fTB[itb].Clear(opt); |
b0a48c4d | 63 | } |
64 | ||
65 | //_______________________________________________________ | |
5eb768d6 | 66 | Bool_t AliTRDtrackingChamber::Build(AliTRDgeometry *const geo, Bool_t hlt) |
b0a48c4d | 67 | { |
68 | // Init chamber and all time bins (AliTRDchamberTimeBin) | |
69 | // Calculates radial position of the chamber based on | |
70 | // radial positions of the time bins (calibration/alignment aware) | |
71 | // | |
349f5eeb | 72 | if(fDetector < 0 || fDetector >= AliTRDgeometry::kNdet){ |
73 | AliWarning(Form("Detector index not set correctly to %d", fDetector)); | |
74 | return kFALSE; | |
75 | } | |
76 | ||
c79857d5 | 77 | Int_t stack = AliTRDgeometry::GetStack(fDetector); |
78 | Int_t layer = AliTRDgeometry::GetLayer(fDetector); | |
b0a48c4d | 79 | AliTRDpadPlane *pp = geo->GetPadPlane(layer, stack); |
80 | Double_t zl = pp->GetRow0ROC() - pp->GetRowEndROC(); | |
81 | Double_t z0 = geo->GetRow0(layer, stack, 0) - zl; | |
82 | Int_t nrows = pp->GetNrows(); | |
83 | ||
84 | Int_t index[50], jtb = 0; | |
fac58f00 | 85 | for(Int_t itb=0; itb<AliTRDseedV1::kNtb; itb++){ |
b0a48c4d | 86 | if(!fTB[itb]) continue; |
87 | fTB[itb].SetRange(z0, zl); | |
88 | fTB[itb].SetNRows(nrows); | |
89 | fTB[itb].BuildIndices(); | |
90 | index[jtb++] = itb; | |
91 | } | |
92 | if(jtb<2) return kFALSE; | |
5eb768d6 | 93 | |
94 | AliTRDcalibDB *calib = AliTRDcalibDB::Instance(); | |
4eb02ab1 | 95 | Float_t t0; |
5eb768d6 | 96 | if(!hlt){ |
4eb02ab1 | 97 | t0 = calib->GetT0Average(fDetector); |
5eb768d6 | 98 | }else{ |
4eb02ab1 | 99 | t0 = calib->GetT0Det()->GetValue(fDetector); |
5eb768d6 | 100 | } |
101 | // fVD = calib->GetVdriftAverage(fDetector); | |
102 | // fS2PRF = calib->GetPRFROC(fDetector)->GetMean(); fS2PRF *= fS2PRF; | |
103 | // fExB = AliTRDCommonParam::Instance()->GetOmegaTau(fVD); | |
104 | // AliTRDCommonParam::Instance()->GetDiffCoeff(fDiffL, fDiffT, fVD); | |
105 | ||
b0a48c4d | 106 | // ESTIMATE POSITION OF PAD PLANE FOR THIS CHAMBER |
4eb02ab1 | 107 | fTB[Int_t(t0)].SetT0(); |
b0a48c4d | 108 | Double_t x0 = fTB[index[0]].GetX(); |
109 | Double_t x1 = fTB[index[1]].GetX(); | |
110 | Double_t dx = (x0 - x1)/(index[1] - index[0]); | |
b0a48c4d | 111 | fX0 = x0 + dx*(index[0] - t0); |
112 | return kTRUE; | |
113 | } | |
c79857d5 | 114 | |
b0a48c4d | 115 | //_______________________________________________________ |
116 | Int_t AliTRDtrackingChamber::GetNClusters() const | |
117 | { | |
ac1dec3b | 118 | // Basic loop method |
b0a48c4d | 119 | // Returns number of clusters in chamber |
120 | // | |
121 | Int_t n = 0; | |
fac58f00 | 122 | for(Int_t itb=0; itb<AliTRDseedV1::kNtb; itb++){ |
b0a48c4d | 123 | n += Int_t(fTB[itb]); |
124 | } | |
125 | return n; | |
126 | } | |
127 | ||
ac1dec3b | 128 | //_______________________________________________________ |
129 | void AliTRDtrackingChamber::Bootstrap(const AliTRDReconstructor *rec) | |
130 | { | |
131 | // Basic loop method | |
132 | // Bootstrap each time bin | |
133 | // | |
134 | AliTRDchamberTimeBin *jtb = &fTB[0]; | |
fac58f00 | 135 | for(Int_t itb=0; itb<AliTRDseedV1::kNtb; itb++, ++jtb){ |
ac1dec3b | 136 | (*jtb).Bootstrap(rec, fDetector); |
137 | } | |
138 | } | |
139 | ||
140 | //_______________________________________________________ | |
141 | void AliTRDtrackingChamber::SetOwner() | |
142 | { | |
143 | // Basic loop method | |
144 | // Set ownership in time bins | |
145 | // | |
146 | AliTRDchamberTimeBin *jtb = &fTB[0]; | |
fac58f00 | 147 | for(Int_t itb=0; itb<AliTRDseedV1::kNtb; itb++, ++jtb){ |
ac1dec3b | 148 | if(!(Int_t(*jtb))) continue; |
149 | (*jtb).SetOwner(); | |
150 | } | |
151 | } | |
152 | ||
b0a48c4d | 153 | //_______________________________________________________ |
154 | Double_t AliTRDtrackingChamber::GetQuality() | |
155 | { | |
156 | // | |
157 | // Calculate chamber quality for seeding. | |
158 | // | |
159 | // | |
160 | // Parameters : | |
161 | // layers : Array of propagation layers for this plane. | |
162 | // | |
163 | // Output : | |
164 | // plane quality factor for seeding | |
165 | // | |
166 | // Detailed description | |
167 | // | |
168 | // The quality of the plane for seeding is higher if: | |
169 | // 1. the average timebin population is closer to an integer number | |
170 | // 2. the distribution of clusters/timebin is closer to a uniform distribution. | |
171 | // - the slope of the first derivative of a parabolic fit is small or | |
172 | // - the slope of a linear fit is small | |
173 | // | |
174 | ||
175 | Int_t ncl = 0; | |
176 | Int_t nused = 0; | |
177 | Int_t nClLayer; | |
fac58f00 | 178 | for(int itb=0; itb<AliTRDseedV1::kNtb; itb++){ |
b0a48c4d | 179 | if(!(nClLayer = fTB[itb].GetNClusters())) continue; |
180 | ncl += nClLayer; | |
181 | for(Int_t incl = 0; incl < nClLayer; incl++){ | |
182 | if((fTB[itb].GetCluster(incl))->IsUsed()) nused++; | |
183 | } | |
184 | } | |
185 | ||
186 | // calculate the deviation of the mean number of clusters from the | |
187 | // closest integer values | |
188 | Float_t nclMed = float(ncl-nused)/AliTRDtrackerV1::GetNTimeBins(); | |
189 | Int_t ncli = Int_t(nclMed); | |
190 | Float_t nclDev = TMath::Abs(nclMed - TMath::Max(ncli, 1)); | |
191 | nclDev -= (nclDev>.5) && ncli ? 1. : 0.; | |
192 | return TMath::Exp(-5.*TMath::Abs(nclDev)); | |
193 | ||
194 | // // get slope of the derivative | |
195 | // if(!fitter.Eval()) return quality; | |
196 | // fitter.PrintResults(3); | |
197 | // Double_t a = fitter.GetParameter(1); | |
198 | // | |
199 | // printf("ncl_dev(%f) a(%f)\n", ncl_dev, a); | |
200 | // return quality*TMath::Exp(-a); | |
201 | ||
202 | } | |
203 | ||
204 | ||
205 | //_______________________________________________________ | |
4d6aee34 | 206 | Bool_t AliTRDtrackingChamber::GetSeedingLayer(AliTRDchamberTimeBin *&fakeLayer, AliTRDgeometry * const geo, const AliTRDReconstructor *rec) |
b0a48c4d | 207 | { |
208 | // | |
209 | // Creates a seeding layer | |
210 | // | |
211 | ||
212 | // constants | |
213 | const Int_t kMaxRows = 16; | |
214 | const Int_t kMaxCols = 144; | |
215 | const Int_t kMaxPads = 2304; | |
216 | Int_t timeBinMin = rec->GetRecoParam()->GetNumberOfPresamples(); | |
217 | Int_t timeBinMax = rec->GetRecoParam()->GetNumberOfPostsamples(); | |
218 | ||
219 | // Get the geometrical data of the chamber | |
220 | Int_t layer = geo->GetLayer(fDetector); | |
221 | Int_t stack = geo->GetStack(fDetector); | |
222 | Int_t sector= geo->GetSector(fDetector); | |
223 | AliTRDpadPlane *pp = geo->GetPadPlane(layer, stack); | |
224 | Int_t nCols = pp->GetNcols(); | |
225 | Float_t ymin = TMath::Min(pp->GetCol0(), pp->GetColEnd()); | |
226 | Float_t ymax = TMath::Max(pp->GetCol0(), pp->GetColEnd()); | |
227 | Float_t zmin = TMath::Min(pp->GetRow0(), pp->GetRowEnd()); | |
228 | Float_t zmax = TMath::Max(pp->GetRow0(), pp->GetRowEnd()); | |
229 | Float_t z0 = -1., zl = -1.; | |
230 | Int_t nRows = pp->GetNrows(); | |
231 | Float_t binlength = (ymax - ymin)/nCols; | |
232 | //AliInfo(Form("ymin(%f) ymax(%f) zmin(%f) zmax(%f) nRows(%d) binlength(%f)", ymin, ymax, zmin, zmax, nRows, binlength)); | |
233 | ||
234 | // Fill the histogram | |
235 | Int_t nClusters; | |
236 | Int_t *histogram[kMaxRows]; // 2D-Histogram | |
237 | Int_t hvals[kMaxPads + 1]; memset(hvals, 0, sizeof(Int_t)*kMaxPads); // one entry in addition for termination flag | |
238 | Float_t *sigmas[kMaxRows]; | |
239 | Float_t svals[kMaxPads]; memset(svals, 0, sizeof(Float_t)*kMaxPads); | |
4d6aee34 | 240 | AliTRDcluster *c = NULL; |
b0a48c4d | 241 | for(Int_t irs = 0; irs < kMaxRows; irs++){ |
242 | histogram[irs] = &hvals[irs*kMaxCols]; | |
243 | sigmas[irs] = &svals[irs*kMaxCols]; | |
244 | } | |
fac58f00 | 245 | for(Int_t iTime = timeBinMin; iTime < AliTRDseedV1::kNtb-timeBinMax; iTime++){ |
b0a48c4d | 246 | if(!(nClusters = fTB[iTime].GetNClusters())) continue; |
247 | z0 = fTB[iTime].GetZ0(); | |
248 | zl = fTB[iTime].GetDZ0(); | |
249 | for(Int_t incl = 0; incl < nClusters; incl++){ | |
250 | c = fTB[iTime].GetCluster(incl); | |
251 | histogram[c->GetPadRow()][c->GetPadCol()]++; | |
252 | sigmas[c->GetPadRow()][c->GetPadCol()] += c->GetSigmaZ2(); | |
253 | } | |
254 | } | |
255 | ||
256 | // Now I have everything in the histogram, do the selection | |
257 | //Int_t nPads = nCols * nRows; | |
258 | // This is what we are interested in: The center of gravity of the best candidates | |
259 | Float_t cogyvals[kMaxPads]; memset(cogyvals, 0, sizeof(Float_t)*kMaxPads); | |
260 | Float_t cogzvals[kMaxPads]; memset(cogzvals, 0, sizeof(Float_t)*kMaxPads); | |
261 | Float_t *cogy[kMaxRows]; | |
262 | Float_t *cogz[kMaxRows]; | |
263 | ||
264 | // Lookup-Table storing coordinates according to the bins | |
41f024fb | 265 | Float_t yLengths[kMaxCols]; memset(yLengths, 0, kMaxCols*sizeof(Float_t)); |
266 | Float_t zLengths[kMaxRows]; memset(zLengths, 0, kMaxRows*sizeof(Float_t)); | |
b0a48c4d | 267 | for(Int_t icnt = 0; icnt < nCols; icnt++){ |
268 | yLengths[icnt] = pp->GetColPos(nCols - 1 - icnt) + binlength/2; | |
269 | } | |
270 | for(Int_t icnt = 0; icnt < nRows; icnt++){ | |
271 | zLengths[icnt] = pp->GetRowPos(icnt) - pp->GetRowSize(icnt)/2; | |
272 | } | |
273 | ||
274 | // A bitfield is used to mask the pads as usable | |
275 | Short_t mask[kMaxCols]; memset(mask, 0 ,sizeof(Short_t) * kMaxCols);//bool mvals[kMaxPads]; | |
276 | for(UChar_t icount = 0; icount < nRows; icount++){ | |
277 | cogy[icount] = &cogyvals[icount*kMaxCols]; | |
278 | cogz[icount] = &cogzvals[icount*kMaxCols]; | |
279 | } | |
280 | // In this array the array position of the best candidates will be stored | |
281 | Int_t cand[AliTRDtrackerV1::kMaxTracksStack]; | |
282 | Float_t sigcands[AliTRDtrackerV1::kMaxTracksStack]; | |
283 | ||
284 | // helper variables | |
285 | Int_t indices[kMaxPads]; memset(indices, -1, sizeof(Int_t)*kMaxPads); | |
286 | Int_t nCandidates = 0; | |
287 | Float_t norm, cogv; | |
288 | // histogram filled -> Select best bins | |
289 | Int_t nPads = nCols * nRows; | |
290 | // take out all the bins which have less than 3 entries (faster sorting) | |
291 | Int_t content[kMaxPads], dictionary[kMaxPads], nCont = 0, padnumber = 0; | |
292 | Int_t *iter = &hvals[0], *citer = &content[0], *diter = &dictionary[0]; // iterators for preselection | |
293 | const Int_t threshold = 2; | |
294 | hvals[nPads] = -1; // termination for iterator | |
295 | do{ | |
296 | if(*iter > threshold){ | |
297 | *(citer++) = *iter; | |
298 | *(diter++) = padnumber; | |
299 | nCont++; | |
300 | } | |
301 | padnumber++; | |
302 | }while(*(++iter) != -1); | |
303 | TMath::Sort(nCont, content, indices); | |
304 | ||
305 | Int_t col, row, lower, lower1, upper, upper1; | |
306 | for(Int_t ib = 0; ib < nCont; ib++){ | |
307 | if(nCandidates >= AliTRDtrackerV1::kMaxTracksStack){ | |
0e0d327b | 308 | AliDebug(1, Form("Number of seed candidates %d exceeded maximum allowed per stack %d", nCandidates, AliTRDtrackerV1::kMaxTracksStack)); |
b0a48c4d | 309 | break; |
310 | } | |
311 | // Positions | |
312 | row = dictionary[indices[ib]]/nCols; | |
313 | col = dictionary[indices[ib]]%nCols; | |
314 | // here will be the threshold condition: | |
315 | if((mask[col] & (1 << row)) != 0) continue; // Pad is masked: continue | |
316 | // if(histogram[row][col] < TMath::Max(threshold, 1)){ // of course at least one cluster is needed | |
317 | // break; // number of clusters below threshold: break; | |
318 | // } | |
319 | // passing: Mark the neighbors | |
320 | lower = TMath::Max(col - 1, 0); upper = TMath::Min(col + 2, nCols); | |
321 | lower1 = TMath::Max(row - 1, 0); upper1 = TMath::Min(row + 2, nCols); | |
322 | for(Int_t ic = lower; ic < upper; ++ic) | |
323 | for(Int_t ir = lower1; ir < upper1; ++ir){ | |
324 | if(ic == col && ir == row) continue; | |
325 | mask[ic] |= (1 << ir); | |
326 | } | |
327 | // Storing the position in an array | |
328 | // testing for neigboring | |
329 | cogv = 0; | |
330 | norm = 0; | |
331 | lower = TMath::Max(col - 1, 0); | |
332 | upper = TMath::Min(col + 2, nCols); | |
333 | for(Int_t inb = lower; inb < upper; ++inb){ | |
334 | cogv += yLengths[inb] * histogram[row][inb]; | |
335 | norm += histogram[row][inb]; | |
336 | } | |
337 | cogy[row][col] = cogv / norm; | |
338 | cogv = 0; norm = 0; | |
339 | lower = TMath::Max(row - 1, 0); | |
340 | upper = TMath::Min(row + 2, nRows); | |
341 | for(Int_t inb = lower; inb < upper; ++inb){ | |
342 | cogv += zLengths[inb] * histogram[inb][col]; | |
343 | norm += histogram[inb][col]; | |
344 | } | |
345 | cogz[row][col] = Float_t(cogv) / norm; | |
346 | // passed the filter | |
347 | cand[nCandidates] = row*nCols + col; // store the position of a passig candidate into an Array | |
348 | sigcands[nCandidates] = sigmas[row][col] / histogram[row][col]; // never be a floating point exeption | |
349 | // Analysis output | |
350 | nCandidates++; | |
351 | } | |
352 | if(!nCandidates) return kFALSE; | |
353 | ||
354 | Float_t pos[3], sig[2]; | |
355 | Short_t signal[7]; memset(&signal[0], 0, 7*sizeof(Short_t)); | |
356 | ||
357 | new(fakeLayer) AliTRDchamberTimeBin(layer, stack, sector, z0, zl); | |
358 | fakeLayer->SetReconstructor(rec); | |
ac1dec3b | 359 | fakeLayer->SetNRows(nRows); |
360 | fakeLayer->SetOwner(kFALSE); | |
b0a48c4d | 361 | if(nCandidates){ |
362 | UInt_t fakeIndex = 0; | |
363 | for(Int_t ican = 0; ican < nCandidates; ican++){ | |
364 | row = cand[ican] / nCols; | |
365 | col = cand[ican] % nCols; | |
366 | //temporary | |
367 | Int_t n = 0; Double_t x = 0., y = 0., z = 0.; | |
fac58f00 | 368 | for(int itb=0; itb<AliTRDseedV1::kNtb; itb++){ |
b0a48c4d | 369 | if(!(nClusters = fTB[itb].GetNClusters())) continue; |
370 | for(Int_t incl = 0; incl < nClusters; incl++){ | |
371 | c = fTB[itb].GetCluster(incl); | |
372 | if(c->GetPadRow() != row) continue; | |
373 | if(TMath::Abs(c->GetPadCol() - col) > 2) continue; | |
374 | x += c->GetX(); | |
375 | y += c->GetY(); | |
376 | z += c->GetZ(); | |
377 | n++; | |
378 | } | |
379 | } | |
380 | pos[0] = x/n; | |
381 | pos[1] = y/n; | |
382 | pos[2] = z/n; | |
383 | sig[0] = .02; | |
384 | sig[1] = sigcands[ican]; | |
4d6aee34 | 385 | fakeLayer->InsertCluster(new AliTRDcluster(fDetector, 0., pos, sig, NULL, 3, signal, col, row, 0, 0, 0., 0), fakeIndex++); |
b0a48c4d | 386 | } |
387 | } | |
b0a48c4d | 388 | fakeLayer->BuildIndices(); |
ac1dec3b | 389 | //fakeLayer->Print(); |
b0a48c4d | 390 | |
a2fbb6ec | 391 | if(rec->GetRecoParam()->GetStreamLevel(AliTRDrecoParam::kTracker) >= 3){ |
b0a48c4d | 392 | //TMatrixD hist(nRows, nCols); |
393 | //for(Int_t i = 0; i < nRows; i++) | |
394 | // for(Int_t j = 0; j < nCols; j++) | |
395 | // hist(i,j) = histogram[i][j]; | |
a2fbb6ec | 396 | TTreeSRedirector &cstreamer = *rec->GetDebugStream(AliTRDrecoParam::kTracker); |
b0a48c4d | 397 | cstreamer << "GetSeedingLayer" |
398 | << "layer=" << layer | |
399 | << "ymin=" << ymin | |
400 | << "ymax=" << ymax | |
401 | << "zmin=" << zmin | |
402 | << "zmax=" << zmax | |
403 | << "L.=" << fakeLayer | |
404 | //<< "Histogram.=" << &hist | |
405 | << "\n"; | |
406 | } | |
407 | ||
408 | return kTRUE; | |
409 | } | |
410 | ||
6c207d50 | 411 | |
412 | //_______________________________________________________ | |
413 | void AliTRDtrackingChamber::Print(Option_t *opt) const | |
414 | { | |
4d6aee34 | 415 | // Print the chamber status |
6c207d50 | 416 | if(!GetNClusters()) return; |
417 | AliInfo(Form("fDetector = %d", fDetector)); | |
418 | AliInfo(Form("fX0 = %7.3f", fX0)); | |
419 | const AliTRDchamberTimeBin *itb = &fTB[0]; | |
fac58f00 | 420 | for(Int_t jtb=0; jtb<AliTRDseedV1::kNtb; jtb++, itb++) (*itb).Print(opt); |
6c207d50 | 421 | } |
fac58f00 | 422 | |
423 | ||
424 | //_______________________________________________________ | |
425 | void AliTRDtrackingChamber::Update() | |
426 | { | |
427 | // Steer purging of used and shared clusters | |
428 | ||
429 | AliTRDchamberTimeBin *jtb = &fTB[0]; | |
430 | for(Int_t itb=AliTRDseedV1::kNtb; itb--; ++jtb){ | |
431 | if(!(Int_t(*jtb))) continue; | |
432 | (*jtb).BuildIndices(); | |
433 | } | |
434 | } | |
435 |