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- update GTU simulation to allow for running during analysis
[u/mrichter/AliRoot.git] / TRD / AliTRDgtuTMU.cxx
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52c19022 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: AliTRDgtuTMU.cxx 28397 2008-09-02 09:33:00Z cblume $ */
17
18////////////////////////////////////////////////////////////////////////////
19// //
20// Track Matching Unit (TMU) simulation //
21// //
22// Author: J. Klein (Jochen.Klein@cern.ch) //
23// //
24////////////////////////////////////////////////////////////////////////////
25
26#include "TTree.h"
27#include "TList.h"
28#include "TVectorD.h"
29#include "TMath.h"
30
31#include "AliESDEvent.h"
32#include "AliESDTrdTrack.h"
33
34#include "AliLog.h"
35#include "AliTRDgeometry.h"
36#include "AliTRDpadPlane.h"
37
38#include "AliTRDgtuParam.h"
39#include "AliTRDgtuTMU.h"
40#include "AliTRDtrackGTU.h"
41
42ClassImp(AliTRDgtuTMU)
43
44AliTRDgtuTMU::AliTRDgtuTMU(Int_t stack, Int_t sector) :
45 TObject(),
46 fTracklets(0x0),
44eafcf2 47 fTrackletsPostInput(0x0),
52c19022 48 fZChannelTracklets(0x0),
49 fTracks(0x0),
50 fGtuParam(0x0),
51 fStack(-1),
52 fSector(-1)
53{
36dc3337 54 // constructor which initializes the position information of the TMU
55
52c19022 56 fGtuParam = AliTRDgtuParam::Instance();
44eafcf2 57
58 // store tracklets per link
59 fTracklets = new TObjArray*[fGtuParam->GetNLinks()];
60 for (Int_t iLink = 0; iLink < fGtuParam->GetNLinks(); iLink++) {
61 fTracklets[iLink] = new TObjArray();
62 }
63
64 // tracklets after input units per layer
65 fTrackletsPostInput = new TObjArray*[fGtuParam->GetNLayers()];
52c19022 66 fZChannelTracklets = new TList*[fGtuParam->GetNLayers()];
67 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
52c19022 68 fZChannelTracklets[layer] = new TList[fGtuParam->GetNZChannels()];
44eafcf2 69 fTrackletsPostInput[layer] = new TObjArray();
52c19022 70 }
44eafcf2 71
52c19022 72 fTracks = new TList*[fGtuParam->GetNZChannels()];
73 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
74 fTracks[zch] = new TList[fGtuParam->GetNRefLayers()];
75 }
44eafcf2 76
5f006bd7 77 if (stack > -1)
52c19022 78 SetStack(stack);
79 if (sector > -1)
80 SetSector(sector);
81}
82
5f006bd7 83AliTRDgtuTMU::~AliTRDgtuTMU()
52c19022 84{
36dc3337 85 // destructor
86
52c19022 87 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
88 delete [] fTracks[zch];
89 }
90 delete [] fTracks;
91 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
52c19022 92 delete [] fZChannelTracklets[layer];
a3461d38 93 delete fTrackletsPostInput[layer];
52c19022 94 }
95 delete [] fZChannelTracklets;
a3461d38 96 delete [] fTrackletsPostInput;
44eafcf2 97
98 for (Int_t iLink = 0; iLink < fGtuParam->GetNLinks(); iLink++) {
99 delete fTracklets[iLink];
100 }
52c19022 101 delete [] fTracklets;
102}
103
104Bool_t AliTRDgtuTMU::SetSector(Int_t sector)
105{
106 // set the sector
107
108 if (sector > -1 && sector < fGtuParam->GetGeo()->Nsector() ) {
5f006bd7 109 fSector = sector;
52c19022 110 return kTRUE;
111 }
112
113 AliError(Form("Invalid sector given: %i", sector));
114 return kFALSE;
115}
116
5f006bd7 117Bool_t AliTRDgtuTMU::SetStack(Int_t stack)
52c19022 118{
119 // Set the stack (necessary for tracking)
120
121 if (stack > -1 && stack < fGtuParam->GetGeo()->Nstack() ) {
122 fStack = stack;
123 return kTRUE;
124 }
125
126 AliError(Form("Invalid stack given: %i", stack));
127 return kFALSE;
128}
129
5f006bd7 130Bool_t AliTRDgtuTMU::Reset()
52c19022 131{
132 // delete all tracks
133
134 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
135 for (Int_t reflayeridx = 0; reflayeridx < fGtuParam->GetNRefLayers(); reflayeridx++) {
136 fTracks[zch][reflayeridx].Clear();
137 }
138 }
139
140 // delete all added tracklets
44eafcf2 141 for (Int_t iLink = 0; iLink < fGtuParam->GetNLinks(); iLink++) {
142 fTracklets[iLink]->Clear();
143 }
52c19022 144 for (Int_t layer = 0; layer < fGtuParam->GetNLinks()/2; layer++) {
44eafcf2 145 fTrackletsPostInput[layer]->Clear();
52c19022 146 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++)
147 fZChannelTracklets[layer][zch].Clear();
52c19022 148 }
149
150 fSector = -1;
151 fStack = -1;
152
153 return kTRUE;
154}
155
44eafcf2 156Bool_t AliTRDgtuTMU::AddTracklet(AliTRDtrackletGTU *tracklet, Int_t link)
52c19022 157{
158 // add a tracklet on the given link
159
44eafcf2 160 fTracklets[link]->Add(tracklet);
52c19022 161 return kTRUE;
162}
163
164
34d48b8f 165Bool_t AliTRDgtuTMU::RunTMU(TList *ListOfTracks, AliESDEvent *esd, Int_t outLabel)
52c19022 166{
167 // performs the analysis as in a TMU module of the GTU, i. e.
168 // track matching
169 // calculation of track parameteres (pt, deflection, ???)
170
171 if (fStack < 0 || fSector < 0) {
36dc3337 172 AliError("No valid stack/sector set for this TMU! No tracking!");
52c19022 173 return kFALSE;
174 }
175
176 // ----- Input units -----
c8b1590d 177 AliDebug(1,"--------- Running Input units ----------");
52c19022 178 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
179 if (!RunInputUnit(layer)) {
180 AliError(Form("Input unit in layer %i failed", layer));
181 return kFALSE;
182 }
183 }
184
185 // ----- Z-channel units -----
c8b1590d 186 AliDebug(1,"--------- Running Z-channel units ----------");
52c19022 187 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
52c19022 188 if (!RunZChannelUnit(layer)) {
189 AliError(Form("Z-Channel unit in layer %i failed", layer));
190 return kFALSE;
191 }
192 }
193
194 // ----- track finding -----
c8b1590d 195 AliDebug(1,"--------- Running tracking units ----------");
52c19022 196 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
52c19022 197 if (!RunTrackFinder(zch, ListOfTracks)) {
198 AliError(Form("Track Finder in z-channel %i failed", zch));
199 return kFALSE;
200 }
5f006bd7 201 }
52c19022 202
203 // ----- Track Merging -----
204 if (!RunTrackMerging(ListOfTracks)) {
205 AliError("Track merging failed");
206 return kFALSE;
207 }
208
209 // ----- track reconstruction -----
210 if (!RunTrackReconstruction(ListOfTracks)) {
211 AliError("Track reconstruction failed");
212 return kFALSE;
213 }
214
2f1bde31 215 // ----- label calculation and ESD storage -----
216 TIter next(ListOfTracks);
217 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) next()) {
34d48b8f 218 if (outLabel == -1)
219 trk->CookLabel();
220 else
221 trk->SetLabel(outLabel);
2f1bde31 222 if (esd) {
223 AliESDTrdTrack *trdtrack = trk->CreateTrdTrack();
224 esd->AddTrdTrack(trdtrack);
225 delete trdtrack;
226 }
52c19022 227 }
228
229 return kTRUE;
230}
231
5f006bd7 232Bool_t AliTRDgtuTMU::RunInputUnit(Int_t layer)
52c19022 233{
234 // precalculations for the tracking and reconstruction
235
44eafcf2 236 Int_t iTrkl0 = 0; // A-side tracklet
237 Int_t iTrkl1 = 0; // B-side tracklet
238
a3461d38 239 Int_t nTracklets = 0;
240 while ((!fGtuParam->GetLimitNoTracklets() ||
241 (nTracklets < fGtuParam->GetMaxNoTracklets())) &&
242 ((iTrkl0 < fTracklets[2*layer + 0]->GetEntriesFast()) ||
243 (iTrkl1 < fTracklets[2*layer + 1]->GetEntriesFast()))) {
44eafcf2 244 if (iTrkl1 >= fTracklets[2*layer + 1]->GetEntriesFast()) {
245 fTrackletsPostInput[layer]->AddLast(fTracklets[2*layer + 0]->At(iTrkl0));
246 iTrkl0++;
247 }
248 else {
249 if (iTrkl0 >= fTracklets[2*layer + 0]->GetEntriesFast()) {
250 fTrackletsPostInput[layer]->AddLast(fTracklets[2*layer + 1]->At(iTrkl1));
251 iTrkl1++;
252 }
253 else {
254 if (((AliTRDtrackletGTU*) fTracklets[2*layer + 1]->At(iTrkl1))->GetZbin() <
255 ((AliTRDtrackletGTU*) fTracklets[2*layer + 0]->At(iTrkl0))->GetZbin()) {
256 fTrackletsPostInput[layer]->AddLast(fTracklets[2*layer + 1]->At(iTrkl1));
257 iTrkl1++;
258
259 }
260 else {
261 fTrackletsPostInput[layer]->AddLast(fTracklets[2*layer + 0]->At(iTrkl0));
262 iTrkl0++;
263 }
264 }
265 }
a3461d38 266 ++nTracklets;
44eafcf2 267 }
268
269 TIter next(fTrackletsPostInput[layer]);
52c19022 270
271 while ( AliTRDtrackletGTU *trk = (AliTRDtrackletGTU*) next() ) {
44eafcf2 272 trk->SetIndex(fTrackletsPostInput[layer]->IndexOf(trk));
52c19022 273
5f006bd7 274 Int_t alpha = (trk->GetYbin() >> fGtuParam->GetBitExcessY()) * fGtuParam->GetCiAlpha(layer);
52c19022 275 alpha = ( 2 * trk->GetdY() - (alpha >> fGtuParam->GetBitExcessAlpha()) + 1 ) >> 1;
a10c6981 276 // wrapping projected alpha as in hardware
277 if ((alpha < -64) || (alpha > 63))
bec8ed9c 278 AliDebug(1, Form("alpha out of range: %i", alpha));
a10c6981 279 alpha = alpha & 0x7f;
280 if (alpha & 0x40)
281 trk->SetAlpha(0xffffffc0 | alpha);
282 else
283 trk->SetAlpha(alpha);
52c19022 284
ec5db61b 285 Int_t yproj = trk->GetdY() * (fGtuParam->GetCiYProj(layer));
52c19022 286 yproj = ( ( ( (yproj >> fGtuParam->GetBitExcessYProj()) + trk->GetYbin() ) >> 2) + 1) >> 1;
287 trk->SetYProj(yproj);
288
289 trk->SetYPrime(trk->GetYbin() + fGtuParam->GetYt(fStack, layer, trk->GetZbin()));
290
ec5db61b 291 AliDebug(10, Form("0x%08x: idx: %3i, z: %2i, y: %5i, dy: %3i, y': %5i, y_proj: %5i, alpha: %3i, pid: %3i, c: %5i, yt: %5i",
44eafcf2 292 trk->GetTrackletWord(), trk->GetIndex(), trk->GetZbin(), trk->GetYbin(), trk->GetdY(), trk->GetYPrime(),
ec5db61b 293 trk->GetYProj(), trk->GetAlpha(), trk->GetPID(),
294 fGtuParam->GetCiYProj(layer), fGtuParam->GetYt(fStack, layer, trk->GetZbin()) ));
52c19022 295 }
296 return kTRUE;
297}
298
5f006bd7 299Bool_t AliTRDgtuTMU::RunZChannelUnit(Int_t layer)
52c19022 300{
301 // run the z-channel unit
302
44eafcf2 303 TIter next(fTrackletsPostInput[layer]);
52c19022 304
305 while (AliTRDtrackletGTU *trk = (AliTRDtrackletGTU*) next()) {
52c19022 306 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
307 if (fGtuParam->IsInZChannel(fStack, layer, zch, trk->GetZbin()) ) {
308 trk->SetSubChannel(zch, fGtuParam->GetZSubchannel(fStack, layer, zch, trk->GetZbin()) );
52c19022 309
310 TIter nexttrkl(&fZChannelTracklets[layer][zch], kIterBackward);
311 AliTRDtrackletGTU *t = 0x0;
4cc89512 312 while ((t = (AliTRDtrackletGTU*) nexttrkl.Next())) {
5f006bd7 313 if (t->GetSubChannel(zch) < trk->GetSubChannel(zch) ||
44eafcf2 314 ((t->GetSubChannel(zch) == trk->GetSubChannel(zch)) && (t->GetYProj() < trk->GetYProj())) ) {
52c19022 315 break;
44eafcf2 316 }
52c19022 317 }
44eafcf2 318 if (t)
319 fZChannelTracklets[layer][zch].AddAfter(t, trk);
320 else
321 fZChannelTracklets[layer][zch].AddFirst(trk);
52c19022 322 }
52c19022 323 }
44eafcf2 324 AliDebug(10, Form("stack %d, layer %2d: 0x%08x Z(2..0)=%i/%i/%i",
325 fStack, layer, trk->GetTrackletWord(),
326 fGtuParam->IsInZChannel(fStack, layer, 2, trk->GetZbin()) ? trk->GetSubChannel(2) : -1,
327 fGtuParam->IsInZChannel(fStack, layer, 1, trk->GetZbin()) ? trk->GetSubChannel(1) : -1,
328 fGtuParam->IsInZChannel(fStack, layer, 0, trk->GetZbin()) ? trk->GetSubChannel(0) : -1
329 ));
52c19022 330 }
331 return kTRUE;
332}
333
5f006bd7 334Bool_t AliTRDgtuTMU::RunTrackFinder(Int_t zch, TList* /* ListOfTracks */)
52c19022 335{
336 // run the track finding
337
338 Int_t *notr = new Int_t[fGtuParam->GetNLayers()];
339 Int_t *ptrA = new Int_t[fGtuParam->GetNLayers()];
340 Int_t *ptrB = new Int_t[fGtuParam->GetNLayers()];
341
5f006bd7 342 Bool_t *bHitA = new Bool_t[fGtuParam->GetNLayers()];
52c19022 343 Bool_t *bHitB = new Bool_t[fGtuParam->GetNLayers()];
344 Bool_t *bAligned = new Bool_t[fGtuParam->GetNLayers()];
345 Bool_t *bAlignedA = new Bool_t[fGtuParam->GetNLayers()];
346 Bool_t *bAlignedB = new Bool_t[fGtuParam->GetNLayers()];
347 Bool_t *bDone = new Bool_t[fGtuParam->GetNLayers()];
348 Bool_t ready;
349
350 Int_t *inc = new Int_t[fGtuParam->GetNLayers()];
351 Int_t *incprime = new Int_t[fGtuParam->GetNLayers()];
352
353// ----- signals within current layer -----
36dc3337 354 Int_t yPlus;
5f006bd7 355 Int_t yMinus;
356 Int_t ybPlus;
36dc3337 357 Int_t ybMinus;
358 Int_t alphaPlus;
5f006bd7 359 Int_t alphaMinus;
36dc3337 360 Int_t nHits;
5f006bd7 361 Int_t nUnc;
36dc3337 362 Int_t nWayBeyond;
52c19022 363
364 AliTRDtrackletGTU *trkRA = 0x0; // reference tracklet A
365 AliTRDtrackletGTU *trkRB = 0x0; // reference tracklet B
366 AliTRDtrackletGTU *trkA = 0x0; // tracklet A in current layer
367 AliTRDtrackletGTU *trkB = 0x0; // tracklet B in current layer
368/*
369 AliTRDtrackletGTU *trkEnd = new AliTRDtrackletGTU();
5f006bd7 370 for (Int_t i = 0; i < fGtuParam->GetNZChannels(); i++)
52c19022 371 trkEnd->SetSubChannel(i, 7);
372 trkEnd->SetYProj(0);
373 trkEnd->SetAlpha(0);
374*/
375
376 for (Int_t refLayerIdx = 0; refLayerIdx < fGtuParam->GetNRefLayers(); refLayerIdx++) {
377 Int_t reflayer = fGtuParam->GetRefLayer(refLayerIdx);
d2c8b010 378 AliDebug(5,Form("Tracking for z-channel: %i, reflayer: %i", zch, reflayer));
52c19022 379
380 ready = kFALSE; // ready if all channels done
381
44eafcf2 382// for (Int_t iLayer = 0; iLayer < fGtuParam->GetNLayers(); iLayer++) {
383// for (Int_t iTrkl = 0; iTrkl < fZChannelTracklets[iLayer][zch].GetEntries(); iTrkl++) {
384// printf("%4i/%4i(%i,%i) ",
385// ((AliTRDtrackletGTU*) fZChannelTracklets[iLayer][zch].At(iTrkl))->GetYProj(),
386// ((AliTRDtrackletGTU*) fZChannelTracklets[iLayer][zch].At(iTrkl))->GetAlpha(),
387// ((AliTRDtrackletGTU*) fZChannelTracklets[iLayer][zch].At(iTrkl))->GetIndex(),
388// ((AliTRDtrackletGTU*) fZChannelTracklets[iLayer][zch].At(iTrkl))->GetSubChannel(zch)
389// );
390// }
391// printf("\n");
392// }
393
52c19022 394 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
395 notr[layer] = fZChannelTracklets[layer][zch].GetEntries();
396 ptrA[layer] = 0; // notr[layer] > 0 ? 0 : -1;
397 ptrB[layer] = 1; // notr[layer] > 1 ? 1 : -1;
398
399// not necessary here
400// bDone[layer] = (ptrB[layer] >= notr[layer] - 1); // trkB is last one
401// bDone[layer] = (notr[layer] <= 0);
402// ready = ready && bDone[layer];
403
404 if (reflayer == 1)
c8b1590d 405 AliDebug(5,Form("in layer: %i (zchannel = %i) there are: %i tracklets", layer, zch, notr[layer]));
52c19022 406 }
5f006bd7 407
408 if (ptrA[reflayer] < 0 && ptrB[reflayer] < 0)
52c19022 409 continue;
410
411 while (!ready) {
412 // ----- reference tracklets -----
413 trkRA = 0x0;
414 trkRB = 0x0;
415 if (0 <= ptrA[reflayer] && ptrA[reflayer] < notr[reflayer])
416 trkRA = (AliTRDtrackletGTU*) fZChannelTracklets[reflayer][zch].At(ptrA[reflayer]);
417 else {
a8518fd2 418 AliDebug(10,Form("No valid tracklet in the reference at ptr: %i! Nothing done!", ptrA[reflayer]));
5f006bd7 419 break;
52c19022 420 }
421
422 if (0 <= ptrB[reflayer] && ptrB[reflayer] < notr[reflayer])
423 trkRB = (AliTRDtrackletGTU*) fZChannelTracklets[reflayer][zch].At(ptrB[reflayer]);
424
36dc3337 425 yPlus = trkRA->GetYProj() + fGtuParam->GetDeltaY();
426 yMinus = trkRA->GetYProj() - fGtuParam->GetDeltaY();
427 alphaPlus = trkRA->GetAlpha() + fGtuParam->GetDeltaAlpha();
428 alphaMinus = trkRA->GetAlpha() - fGtuParam->GetDeltaAlpha();
52c19022 429 if (trkRB) {
36dc3337 430 ybPlus = trkRB->GetYProj() + fGtuParam->GetDeltaY();
431 ybMinus = trkRB->GetYProj() - fGtuParam->GetDeltaY();
52c19022 432 }
433 else { // irrelevant (should be, is it?)
36dc3337 434 ybPlus = trkRA->GetYProj() + fGtuParam->GetDeltaY();
435 ybMinus = trkRA->GetYProj() - fGtuParam->GetDeltaY();
52c19022 436 }
437
36dc3337 438 nHits = 0;
439 nUnc = 0;
440 nWayBeyond = 0;
5f006bd7 441
52c19022 442 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
443 bHitA[layer] = bHitB[layer] = bAligned[layer] = kFALSE;
444 inc[layer] = incprime[layer] = 0;
445
446 if (layer == reflayer) {
447 bHitA[layer] = kTRUE;
448 bAligned[layer] = kTRUE;
36dc3337 449 nHits++;
5f006bd7 450 continue;
52c19022 451 }
452
453 trkA = 0x0;
454 trkB = 0x0;
455 if (0 <= ptrA[layer] && ptrA[layer] < notr[layer])
456 trkA = (AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrA[layer]);
457 if (0 <= ptrB[layer] && ptrB[layer] < notr[layer])
458 trkB = (AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrB[layer]);
459
460 bAlignedA[layer] = kFALSE;
461 bAlignedB[layer] = kFALSE;
462
5f006bd7 463 if (trkA) {
36dc3337 464 bHitA[layer] = ( !(trkA->GetSubChannel(zch) < trkRA->GetSubChannel(zch) || (trkA->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkA->GetYProj() < yMinus) ) &&
465 !(trkA->GetSubChannel(zch) > trkRA->GetSubChannel(zch) || (trkA->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkA->GetYProj() > yPlus) ) &&
466 !(trkA->GetAlpha() < alphaMinus) &&
467 !(trkA->GetAlpha() > alphaPlus) );
5f006bd7 468 bAlignedA[layer] = !(trkA->GetSubChannel(zch) < trkRA->GetSubChannel(zch) || (trkA->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkA->GetYProj() < yMinus) );
52c19022 469 }
470 else {
471 bHitA[layer] = 0;
472 bAlignedA[layer] = kTRUE;
473 }
474
475 if (trkB) {
36dc3337 476 bHitB[layer] = ( !(trkB->GetSubChannel(zch) < trkRA->GetSubChannel(zch) || (trkB->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkB->GetYProj() < yMinus) ) &&
477 !(trkB->GetSubChannel(zch) > trkRA->GetSubChannel(zch) || (trkB->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkB->GetYProj() > yPlus) ) &&
44eafcf2 478 !(trkB->GetAlpha() < alphaMinus) &&
479 !(trkB->GetAlpha() > alphaPlus) );
36dc3337 480 bAlignedB[layer] = (trkB->GetSubChannel(zch) > trkRA->GetSubChannel(zch) || (trkB->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkB->GetYProj() > yPlus) );
5f006bd7 481 }
52c19022 482 else {
483 bHitB[layer] = 0;
484 bAlignedB[layer] = kTRUE;
485 }
5f006bd7 486
52c19022 487 bAligned[layer] = bAlignedA[layer] || bAlignedB[layer]; //???
488// bAligned[layer] = bAlignedA[layer]; //???
5f006bd7 489
52c19022 490 if (bAligned[layer] && (bHitA[layer] || bHitB[layer]) )
36dc3337 491 nHits++;
52c19022 492 else if (!bAligned[layer] )
36dc3337 493 nUnc++;
52c19022 494 if (trkRB) {
495 if (trkA) {
36dc3337 496 if ((trkA->GetSubChannel(zch) > trkRB->GetSubChannel(zch)) || (trkA->GetSubChannel(zch) == trkRB->GetSubChannel(zch) && trkA->GetYProj() > ybPlus) )
497 nWayBeyond++;
52c19022 498 }
5f006bd7 499 else
36dc3337 500 nWayBeyond++;
52c19022 501 }
502
503 // pre-calculation for the layer shifting (alignment w. r. t. trkRB)
504 if (trkA) {
505 if(trkRB) {
36dc3337 506 if ((trkA->GetSubChannel(zch) < trkRB->GetSubChannel(zch)) || (trkA->GetSubChannel(zch) == trkRB->GetSubChannel(zch) && trkA->GetYProj() < ybMinus )) // could trkA be aligned for trkRB
52c19022 507 incprime[layer] = 1;
5f006bd7 508 else
52c19022 509 incprime[layer] = 0;
510 }
5f006bd7 511 else
52c19022 512 incprime[layer] = 1;
513
5f006bd7 514 if (trkB) {
52c19022 515 if (trkRB) {
36dc3337 516 if ((trkB->GetSubChannel(zch) < trkRB->GetSubChannel(zch)) || (trkB->GetSubChannel(zch) == trkRB->GetSubChannel(zch) && trkB->GetYProj() < ybMinus )) // could trkB be aligned for trkRB
52c19022 517 incprime[layer] = 2;
518 }
5f006bd7 519 else
52c19022 520 incprime[layer] = 2;
521 }
522 }
523 } // end of loop over layers
524
d2c8b010 525 AliDebug(5,Form("logic calculation finished, Nhits: %i %s",
526 nHits, (nHits >= 4) ? "-> track found" : ""));
52c19022 527
36dc3337 528 if (nHits >= 4) {
52c19022 529 // ----- track registration -----
52c19022 530 AliTRDtrackGTU *track = new AliTRDtrackGTU();
531 track->SetSector(fSector);
532 track->SetStack(fStack);
533 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++ ) {
5f006bd7 534 if (bHitA[layer] || layer == reflayer)
52c19022 535 track->AddTracklet((AliTRDtrackletGTU* ) fZChannelTracklets[layer][zch].At(ptrA[layer]), layer );
5f006bd7 536 else if (bHitB[layer])
52c19022 537 track->AddTracklet((AliTRDtrackletGTU* ) fZChannelTracklets[layer][zch].At(ptrB[layer]), layer );
538 }
539
540 Bool_t registerTrack = kTRUE;
44eafcf2 541 for (Int_t layerIdx = refLayerIdx-1; layerIdx >= 0; layerIdx--) {
80f93426 542 if (track->IsTrackletInLayer(fGtuParam->GetRefLayer(layerIdx))) {
543 if ((track->GetTracklet(fGtuParam->GetRefLayer(layerIdx)))->GetSubChannel(zch) > 0) {
c8b1590d 544 AliDebug(1,"Not registered");
52c19022 545 registerTrack = kFALSE;
80f93426 546 }
547 }
52c19022 548 }
549 if (registerTrack) {
550 track->SetZChannel(zch);
551 track->SetRefLayerIdx(refLayerIdx);
552 fTracks[zch][refLayerIdx].Add(track);
553 }
a3461d38 554 else
555 delete track;
52c19022 556 }
5f006bd7 557
36dc3337 558 if ( (nUnc != 0) && (nUnc + nHits >= 4) ) // could this position of the reference layer give some track //??? special check in case of hit?
52c19022 559 inc[reflayer] = 0;
36dc3337 560 else if (nWayBeyond > 2) // no track possible for both reference tracklets
52c19022 561 inc[reflayer] = 2;
5f006bd7 562 else
52c19022 563 inc[reflayer] = 1;
5f006bd7 564
52c19022 565 if (inc[reflayer] != 0) // reflayer is shifted
566 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
567 if (layer == reflayer)
568 continue;
5f006bd7 569 inc[layer] = incprime[layer];
52c19022 570 }
571 else { // reflayer is not shifted
572 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
573 if (layer == reflayer || notr[layer] == 0)
574 continue;
575 inc[layer] = 0;
576 trkA = 0x0;
577 trkB = 0x0;
578 if (0 <= ptrA[layer] && ptrA[layer] < notr[layer])
579 trkA = (AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrA[layer]);
580
581 if (0 <= ptrB[layer] && ptrB[layer] < notr[layer])
582 trkB = (AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrB[layer]);
583
584 if (trkA) {
44eafcf2 585 if ( !(trkA->GetSubChannel(zch) < trkRA->GetSubChannel(zch) || (trkA->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkA->GetYProj() < yMinus) ) &&
586 !(trkA->GetSubChannel(zch) > trkRA->GetSubChannel(zch) || (trkA->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkA->GetYProj() > yPlus ) ) ) // trkA could hit trkRA
587 // if ( !(trkA->GetSubChannel(zch) < trkRA->GetSubChannel(zch) || (trkA->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkA->GetYProj() < yMinus) ) )
52c19022 588 inc[layer] = 0;
589 else if (trkB) {
36dc3337 590 if ( trkB->GetSubChannel(zch) < trkRA->GetSubChannel(zch) || (trkB->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkB->GetYProj() < yMinus) )
52c19022 591 inc[layer] = 2;
36dc3337 592 else if ( !(trkB->GetSubChannel(zch) > trkRA->GetSubChannel(zch) || (trkB->GetSubChannel(zch) == trkRA->GetSubChannel(zch) && trkB->GetYProj() > yPlus) ) )
52c19022 593 inc[layer] = 1;
5f006bd7 594 else
52c19022 595 inc[layer] = incprime[layer];
596 }
5f006bd7 597 else
52c19022 598 inc[layer] = incprime[layer];
599 }
600 }
601 }
5f006bd7 602
52c19022 603 ready = kTRUE;
d2c8b010 604 for (Int_t layer = fGtuParam->GetNLayers()-1; layer >= 0; layer--) {
52c19022 605
606 bDone[layer] = ptrB[layer] < 0 || ptrB[layer] >= notr[layer];
607 ready = ready && bDone[layer];
608
609 if (inc[layer] != 0 && ptrA[layer] >= notr[layer])
610 AliError(Form("Invalid increment: %i at ptrA: %i, notr: %i", inc[layer], ptrA[layer], notr[layer]));
611
612// AliInfo(Form("Shifting layer: %i, notr: %i, ptrA: %i, ptrB: %i, inc: %i", layer, notr[layer], ptrA[layer], ptrB[layer], inc[layer]));
d2c8b010 613 AliDebug(10,Form(" Layer: %i %2i(%2i, %2i, %4i, %3i)%s%s %2i(%2i, %2i, %4i, %3i)%s%s +%i %s (no: %i)",
44eafcf2 614 layer,
615 ptrA[layer],
616 (0 <= ptrA[layer] && ptrA[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrA[layer]))->GetIndex() : -1,
d2c8b010 617 (0 <= ptrA[layer] && ptrA[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrA[layer]))->GetSubChannel(zch) : -1,
618 (0 <= ptrA[layer] && ptrA[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrA[layer]))->GetYProj() : -1,
619 (0 <= ptrA[layer] && ptrA[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrA[layer]))->GetAlpha() : -1,
44eafcf2 620 bHitA[layer] ? "*" : " ", bAlignedA[layer] ? "+" : " ",
621 ptrB[layer],
622 (0 <= ptrB[layer] && ptrB[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrB[layer]))->GetIndex() : -1,
d2c8b010 623 (0 <= ptrB[layer] && ptrB[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrB[layer]))->GetSubChannel(zch) : -1,
624 (0 <= ptrB[layer] && ptrB[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrB[layer]))->GetYProj() : -1,
625 (0 <= ptrB[layer] && ptrB[layer] < notr[layer]) ? ((AliTRDtrackletGTU*) fZChannelTracklets[layer][zch].At(ptrB[layer]))->GetAlpha() : -1,
44eafcf2 626 bHitB[layer] ? "*" : " ", bAlignedB[layer] ? "+" : " ",
627 inc[layer], bDone[layer] ? "done" : " ", notr[layer]));
52c19022 628 ptrA[layer] += inc[layer];
629 ptrB[layer] += inc[layer];
630 }
631
632 } // end of while
633 } // end of loop over reflayer
634
635 delete [] bHitA;
636 delete [] bHitB;
637 delete [] bAligned;
638 delete [] bDone;
639 delete [] inc;
640 delete [] incprime;
641 delete [] bAlignedA;
642 delete [] bAlignedB;
643 delete [] notr;
644 delete [] ptrA;
645 delete [] ptrB;
646
647 return kTRUE;
648}
649
5f006bd7 650Bool_t AliTRDgtuTMU::RunTrackMerging(TList* ListOfTracks)
52c19022 651{
652 TList **tracksRefMerged = new TList*[fGtuParam->GetNZChannels()];
653 TList **tracksRefUnique = new TList*[fGtuParam->GetNZChannels()];
654
655 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
656 tracksRefMerged[zch] = new TList;
657 tracksRefUnique[zch] = new TList;
658 }
659
660 TList *tracksZMergedStage0 = new TList;
661 TList *tracksZUniqueStage0 = new TList;
662
663 TList **tracksZSplitted = new TList*[2];
664 for (Int_t i = 0; i < 2; i++)
665 tracksZSplitted[i] = new TList;
666
667 TList *tracksZMergedStage1 = new TList;
668
4cc89512 669 AliTRDtrackGTU **trkInRefLayer = new AliTRDtrackGTU*[fGtuParam->GetNRefLayers()];
52c19022 670
c2aad3ae 671 // Bool_t done = kFALSE;
52c19022 672 Int_t minIdx = 0;
673 AliTRDtrackGTU *trkStage0 = 0x0;
674
675 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
44eafcf2 676 // ----- Merging and Unification in Reflayers (seed_merger) -----
52c19022 677 do {
c2aad3ae 678 // done = kTRUE;
52c19022 679 trkStage0 = 0x0;
680 for (Int_t refLayerIdx = 0; refLayerIdx < fGtuParam->GetNRefLayers(); refLayerIdx++) {
4cc89512 681 trkInRefLayer[refLayerIdx] = (AliTRDtrackGTU*) fTracks[zch][refLayerIdx].First();
682 if (trkInRefLayer[refLayerIdx] == 0) {
52c19022 683 continue;
684 }
685 else if (trkStage0 == 0x0 ) {
4cc89512 686 trkStage0 = trkInRefLayer[refLayerIdx];
52c19022 687 minIdx = refLayerIdx;
c2aad3ae 688 // done = kFALSE;
52c19022 689 }
ec5db61b 690 else if ( (trkInRefLayer[refLayerIdx]->GetZSubChannel() < trkStage0->GetZSubChannel()) ||
691 ((trkInRefLayer[refLayerIdx]->GetZSubChannel() == trkStage0->GetZSubChannel()) &&
692 ((trkInRefLayer[refLayerIdx]->GetYapprox() >> 3) < (trkStage0->GetYapprox() >> 3)) ) ) {
52c19022 693 minIdx = refLayerIdx;
4cc89512 694 trkStage0 = trkInRefLayer[refLayerIdx];
c2aad3ae 695 // done = kFALSE;
52c19022 696 }
697 }
c8b1590d 698 if (!trkStage0)
699 break;
52c19022 700 tracksRefMerged[zch]->Add(trkStage0);
701 fTracks[zch][minIdx].RemoveFirst();
702 } while (trkStage0 != 0);
703
704 Uniquifier(tracksRefMerged[zch], tracksRefUnique[zch]);
44eafcf2 705
706 AliDebug(2, Form("zchannel %i", zch));
707 TIter trackRefMerged(tracksRefMerged[zch]);
708 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) trackRefMerged())
709 AliDebug(2, Form("track ref layer %i : %i %i %i %i %i %i, y=%i, z_idx=%i",
d2c8b010 710 AliTRDgtuParam::GetRefLayer(trk->GetRefLayerIdx()),
44eafcf2 711 trk->GetTrackletIndex(5),
712 trk->GetTrackletIndex(4),
713 trk->GetTrackletIndex(3),
714 trk->GetTrackletIndex(2),
715 trk->GetTrackletIndex(1),
716 trk->GetTrackletIndex(0),
717 trk->GetYapprox() >> 3,
718 trk->GetZSubChannel()));
719 AliDebug(2, "uniquified:");
720 TIter trackRefUnique(tracksRefUnique[zch]);
721 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) trackRefUnique())
722 AliDebug(2, Form("track ref layer %i : %i %i %i %i %i %i, y=%i, z_idx=%i",
d2c8b010 723 AliTRDgtuParam::GetRefLayer(trk->GetRefLayerIdx()),
44eafcf2 724 trk->GetTrackletIndex(5),
725 trk->GetTrackletIndex(4),
726 trk->GetTrackletIndex(3),
727 trk->GetTrackletIndex(2),
728 trk->GetTrackletIndex(1),
729 trk->GetTrackletIndex(0),
730 trk->GetYapprox() >> 3,
731 trk->GetZSubChannel()));
52c19022 732 }
733
734// ----- Merging in zchannels - 1st stage -----
5f006bd7 735
ec5db61b 736 if (AliTRDgtuParam::GetUseGTUmerge()) {
737 Int_t notEmpty;
738 do {
739 Bool_t lowerThan[3] = { kFALSE, kFALSE, kFALSE };
740 AliTRDtrackGTU *trk[3] = { 0x0, 0x0, 0x0 };
741 for (Int_t iChannel = 0; iChannel < fGtuParam->GetNZChannels(); ++iChannel)
742 trk[iChannel] = (AliTRDtrackGTU*) tracksRefUnique[iChannel]->First();
743
744 for (Int_t iChannel = 0; iChannel < fGtuParam->GetNZChannels(); ++iChannel) {
745 AliTRDtrackGTU *trk1 = trk[iChannel];
746 AliTRDtrackGTU *trk2 = trk[(iChannel + 1) % 3];
747 if (trk1 && trk2) {
748 Int_t sortnum1 = (trk1->GetZChannel() + 3 * trk1->GetZSubChannel()) / 2 - 1;
749 Int_t sortnum2 = (trk2->GetZChannel() + 3 * trk2->GetZSubChannel()) / 2 - 1;
750 AliDebug(5, Form("comparing tracks %i - %i: %i - %i",
751 trk1->GetZChannel(), trk2->GetZChannel(),
752 sortnum1, sortnum2));
753 if ( (sortnum1 < sortnum2) ||
754 ((sortnum1 == sortnum2) &&
755 ((trk1->GetYapprox() >> 3) < (trk2->GetYapprox() >> 3)) ) ) {
756 lowerThan[iChannel] = kTRUE;
52c19022 757 }
ec5db61b 758 }
759 }
760
761 notEmpty = (trk[2] ? (1 << 2) : 0) |
762 (trk[1] ? (1 << 1) : 0) |
763 (trk[0] ? (1 << 0) : 0);
764 Int_t pop = -1;
765
766 switch (notEmpty) {
767 // one track only
768 case 0x1:
769 pop = 0;
770 break;
771 case 0x2:
772 pop = 1;
773 break;
774 case 0x4:
775 pop = 2;
776 break;
777
778 // two tracks
779 case 0x3:
780 if (lowerThan[0])
781 pop = 0;
782 else
783 pop = 1;
784 break;
785 case 0x5:
786 if (lowerThan[2])
787 pop = 2;
788 else
789 pop = 0;
790 break;
791 case 0x6:
792 if (lowerThan[1])
793 pop = 1;
794 else
795 pop = 2;
796 break;
797
798 // three tracks
799 case 0x7:
800 if (lowerThan[0]) {
801 if (lowerThan[2])
802 pop = 2;
803 else
804 pop = 0;
805 } else {
806 if (lowerThan[1])
807 pop = 1;
808 else
809 pop = 2;
810 }
811 break;
812
813 // no tracks
814 default:
815 // nop
816 ;
817 }
818
819 if (pop > -1) {
820 tracksZMergedStage0->Add(trk[pop]);
821 tracksRefUnique[pop]->RemoveFirst();
822 }
823 } while (notEmpty);
824 }
825 else {
826 // there is still a difference between this implementation and
827 // the hardware algorithm, only for expert use
828
829 do {
830 // done = kTRUE;
831 trkStage0 = 0x0;
832 // compare tracks from all adjacent zchannels
833 // (including comparison of channels 2 and 0)
834 for (Int_t i = fGtuParam->GetNZChannels() - 1; i > -1; i--) {
835 Int_t zch = i % 3;
836 AliTRDtrackGTU *trk = (AliTRDtrackGTU*) tracksRefUnique[zch]->First();
837 if (trk == 0) {
838 continue;
839 }
840 else if (trkStage0 == 0x0 ) {
841 trkStage0 = trk;
842 minIdx = zch;
843 // done = kFALSE;
844 }
845 else {
846 Int_t sortnum1 = (trk->GetZChannel() + 3 * trk->GetZSubChannel()) / 2 - 1;
847 Int_t sortnum2 = (trkStage0->GetZChannel() + 3 * trkStage0->GetZSubChannel()) / 2 - 1;
848 AliDebug(5, Form("comparing tracks %i - %i: %i - %i",
849 trk->GetZChannel(), trkStage0->GetZChannel(),
850 sortnum1, sortnum2));
851 if ( (sortnum1 < sortnum2) ||
852 ((sortnum1 == sortnum2) &&
853 ((trk->GetYapprox() >> 3) < (trkStage0->GetYapprox() >> 3)) ) ) {
854 minIdx = zch;
855 trkStage0 = trk;
856 // done = kFALSE;
52c19022 857 }
ec5db61b 858 }
52c19022 859 }
5f006bd7 860
c8b1590d 861 if (!trkStage0)
862 break;
52c19022 863 tracksZMergedStage0->Add(trkStage0);
864 tracksRefUnique[minIdx]->RemoveFirst();
ec5db61b 865 } while (trkStage0 != 0);
866 }
5f006bd7 867
52c19022 868 Uniquifier(tracksZMergedStage0, tracksZUniqueStage0);
5f006bd7 869
d2c8b010 870 AliDebug(2, "stage 0:");
871 TIter trackZMergedStage0(tracksZMergedStage0);
872 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) trackZMergedStage0())
873 AliDebug(2, Form("track ref layer %i : %i %i %i %i %i %i, y=%i, zch=%i idx=%i",
874 AliTRDgtuParam::GetRefLayer(trk->GetRefLayerIdx()),
875 trk->GetTrackletIndex(5),
876 trk->GetTrackletIndex(4),
877 trk->GetTrackletIndex(3),
878 trk->GetTrackletIndex(2),
879 trk->GetTrackletIndex(1),
880 trk->GetTrackletIndex(0),
881 trk->GetYapprox() >> 3,
882 trk->GetZChannel(),
883 trk->GetZSubChannel()));
884
885 AliDebug(2, "uniquified:");
886 TIter trackZUniqueStage0(tracksZUniqueStage0);
887 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) trackZUniqueStage0())
888 AliDebug(2, Form("track ref layer %i : %i %i %i %i %i %i, y=%i, zch=%i idx=%i",
889 AliTRDgtuParam::GetRefLayer(trk->GetRefLayerIdx()),
890 trk->GetTrackletIndex(5),
891 trk->GetTrackletIndex(4),
892 trk->GetTrackletIndex(3),
893 trk->GetTrackletIndex(2),
894 trk->GetTrackletIndex(1),
895 trk->GetTrackletIndex(0),
896 trk->GetYapprox() >> 3,
897 trk->GetZChannel(),
898 trk->GetZSubChannel()));
899
52c19022 900// ----- Splitting in z -----
5f006bd7 901
52c19022 902 TIter next(tracksZUniqueStage0);
903 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) next()) {
904 tracksZSplitted[(trk->GetZChannel() + 3 * (trk->GetZSubChannel() - 1)) % 2]->Add(trk);
905 }
5f006bd7 906
d2c8b010 907 for (Int_t i = 0; i < 2; i++) {
908 AliDebug(2, Form("split %i:", i));
909 TIter trackZSplit(tracksZSplitted[i]);
910 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) trackZSplit())
911 AliDebug(2, Form("track ref layer %i : %i %i %i %i %i %i, y=%i, zch=%i idx=%i",
912 AliTRDgtuParam::GetRefLayer(trk->GetRefLayerIdx()),
913 trk->GetTrackletIndex(5),
914 trk->GetTrackletIndex(4),
915 trk->GetTrackletIndex(3),
916 trk->GetTrackletIndex(2),
917 trk->GetTrackletIndex(1),
918 trk->GetTrackletIndex(0),
919 trk->GetYapprox() >> 3,
920 trk->GetZChannel(),
921 trk->GetZSubChannel()));
922 }
923
52c19022 924// ----- Merging in zchanels - 2nd stage -----
5f006bd7 925
52c19022 926 do {
c2aad3ae 927 // done = kTRUE;
52c19022 928 trkStage0 = 0x0;
44eafcf2 929 for (Int_t i = 1; i >= 0; i--) {
52c19022 930 AliTRDtrackGTU *trk = (AliTRDtrackGTU*) tracksZSplitted[i]->First();
931 if (trk == 0) {
932 continue;
933 }
934 else if (trkStage0 == 0x0 ) {
935 trkStage0 = trk;
936 minIdx = i;
c2aad3ae 937 // done = kFALSE;
52c19022 938 }
ec5db61b 939 else if ( (((trk->GetZChannel() + 3 * (trk->GetZSubChannel() - 1)) / 2) < ((trkStage0->GetZChannel() + 3 * (trkStage0->GetZSubChannel() - 1)) / 2)) ||
940 ((((trk->GetZChannel() + 3 * (trk->GetZSubChannel() - 1)) / 2) == ((trkStage0->GetZChannel() + 3 * (trkStage0->GetZSubChannel() - 1)) / 2)) &&
941 ((trk->GetYapprox() >> 3) < (trkStage0->GetYapprox() >> 3)) ) ) {
52c19022 942 minIdx = i;
943 trkStage0 = trk;
c2aad3ae 944 // done = kFALSE;
52c19022 945 }
946 }
5f006bd7 947
c8b1590d 948 if (!trkStage0)
949 break;
52c19022 950 tracksZMergedStage1->Add(trkStage0);
951 tracksZSplitted[minIdx]->RemoveFirst();
952 } while (trkStage0 != 0);
5f006bd7 953
52c19022 954 Uniquifier(tracksZMergedStage1, ListOfTracks);
5f006bd7 955
d2c8b010 956 AliDebug(2, "merged:");
957 TIter trackZMergedStage1(tracksZMergedStage1);
958 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) trackZMergedStage1())
959 AliDebug(2, Form("track ref layer %i : %i %i %i %i %i %i, y=%i, zch=%i idx=%i",
960 AliTRDgtuParam::GetRefLayer(trk->GetRefLayerIdx()),
961 trk->GetTrackletIndex(5),
962 trk->GetTrackletIndex(4),
963 trk->GetTrackletIndex(3),
964 trk->GetTrackletIndex(2),
965 trk->GetTrackletIndex(1),
966 trk->GetTrackletIndex(0),
967 trk->GetYapprox() >> 3,
968 trk->GetZChannel(),
969 trk->GetZSubChannel()));
970
971 AliDebug(2, "uniquified:");
972 TIter track(ListOfTracks);
973 while (AliTRDtrackGTU *trk = (AliTRDtrackGTU*) track())
974 AliDebug(2, Form("track ref layer %i : %i %i %i %i %i %i, y=%i, zch=%i idx=%i",
975 AliTRDgtuParam::GetRefLayer(trk->GetRefLayerIdx()),
976 trk->GetTrackletIndex(5),
977 trk->GetTrackletIndex(4),
978 trk->GetTrackletIndex(3),
979 trk->GetTrackletIndex(2),
980 trk->GetTrackletIndex(1),
981 trk->GetTrackletIndex(0),
982 trk->GetYapprox() >> 3,
983 trk->GetZChannel(),
984 trk->GetZSubChannel()));
985
5f006bd7 986 // cleaning up
637666cd 987 for (Int_t zch = 0; zch < fGtuParam->GetNZChannels(); zch++) {
988 delete tracksRefMerged[zch];
989 delete tracksRefUnique[zch];
990 }
991 delete [] tracksRefMerged;
992 delete [] tracksRefUnique;
993
994
995 delete tracksZMergedStage0;
996 delete tracksZUniqueStage0;
997
998 for (Int_t i = 0; i < 2; i++)
999 delete tracksZSplitted[i];
54d34aac 1000 delete [] tracksZSplitted;
637666cd 1001
1002 delete tracksZMergedStage1;
1003
1004 delete [] trkInRefLayer;
1005
52c19022 1006 return kTRUE;
1007}
1008
5f006bd7 1009Bool_t AliTRDgtuTMU::RunTrackReconstruction(TList* ListOfTracks)
52c19022 1010{
36dc3337 1011 // run the track reconstruction for all tracks in the list
1012
52c19022 1013 TIter next(ListOfTracks);
1014 while (AliTRDtrackGTU *track = (AliTRDtrackGTU*) next()) {
1015 CalculateTrackParams(track);
4ff7ed2b 1016 CalculatePID(track);
44eafcf2 1017 AliDebug(1, Form("track with pid = %i", track->GetPID()));
52c19022 1018 }
1019 return kTRUE;
1020}
1021
4ff7ed2b 1022Bool_t AliTRDgtuTMU::CalculatePID(AliTRDtrackGTU *track)
1023{
36dc3337 1024 // calculate PID for the given track
4ff7ed2b 1025 if (!track) {
1026 AliError("No track to calculate!");
1027 return kFALSE;
1028 }
1029
4b43eeaf 1030 if (AliTRDgtuParam::GetUseGTUconst()) {
44eafcf2 1031 // averaging as in GTU
ec5db61b 1032 AliDebug(1, "using GTU constants for PID calculation");
44eafcf2 1033 ULong64_t coeff;
1034
1035 // selection of coefficient for averaging
1036 switch(track->GetTrackletMask()){
1037 case 0x3f:
1038 // 6 tracklets
1039 coeff=0x5558; // approx. 1/6
1040 break;
1041
1042 case 0x3e:
1043 case 0x3d:
1044 case 0x3b:
1045 case 0x37:
1046 case 0x2f:
1047 case 0x1f:
1048 // 5 tracklets
1049 coeff=0x6666; // approx. 1/5
1050 break;
1051
1052 default:
1053 // 4 tracklets
1054 coeff=0x8000; // = 0.25
4ff7ed2b 1055 }
44eafcf2 1056 coeff &= 0x1ffff; // 17-bit constant
1057
1058 ULong64_t sum = 0;
ec5db61b 1059 Int_t i = 0;
44eafcf2 1060 for (Int_t iLayer = 0; iLayer < fGtuParam->GetNLayers(); iLayer++) {
1061 if ((track->GetTrackletMask() >> iLayer) & 1) {
1062 sum += track->GetTracklet(iLayer)->GetPID();
ec5db61b 1063 ++i;
44eafcf2 1064 }
1065 }
1066
ec5db61b 1067 Float_t av = 1./i * sum;
a10c6981 1068 sum = sum & 0x7ff;
1069 ULong64_t prod = (sum * coeff) & 0xfffffffffull;
1070 ULong64_t prodFinal = ((prod >> 17) + ((prod >> 16) & 1)) & 0xff;
44eafcf2 1071
ec5db61b 1072 if (TMath::Abs((prodFinal & 0xff) - av) > 0.5)
1073 AliError(Form("problem with PID averaging (hw <-> ar): %3lli <-> %4.1f", prodFinal & 0xff, av));
44eafcf2 1074 track->SetPID(prodFinal & 0xff);
1075
1076 return kTRUE;
1077 }
1078 else {
1079
1080 // simple averaging
1081 Int_t nTracklets = 0;
1082 Int_t pidSum = 0;
1083 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
1084 if (!track->IsTrackletInLayer(layer)) {
1085 continue;
1086 }
1087 AliTRDtrackletGTU *trk = track->GetTracklet(layer);
1088 pidSum += trk->GetPID();
1089 nTracklets++;
1090 }
ee373611 1091
eaf6dbb0 1092 if (nTracklets>0)
1093 track->SetPID(pidSum/nTracklets);
ee373611 1094 else
1095 AliError("Track without contributing tracklets, no PID assigned");
44eafcf2 1096
1097 return kTRUE;
4ff7ed2b 1098 }
4ff7ed2b 1099}
1100
5f006bd7 1101Bool_t AliTRDgtuTMU::CalculateTrackParams(AliTRDtrackGTU *track)
52c19022 1102{
1103 // calculate the track parameters
1104
1105 if (!track) {
1106 AliError("No track to calculate!");
1107 return kFALSE;
1108 }
1109
1110 Int_t a = 0;
1111 Float_t b = 0;
1112 Float_t c = 0;
1113 Float_t x1;
1114 Float_t x2;
1115
c8b1590d 1116 AliDebug(5,Form("There are %i tracklets in this track.", track->GetNTracklets()));
52c19022 1117
1118 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
1119 if (!track->IsTrackletInLayer(layer)) {
1120 continue;
1121 }
1122 AliTRDtrackletGTU *trk = track->GetTracklet(layer);
1123 if (!trk) {
1124 AliError(Form("Could not get tracklet in layer %i\n", layer));
1125 continue;
1126 }
ec5db61b 1127 AliDebug(10,Form(" layer %i trk yprime: %6i, aki: %6i", layer, trk->GetYPrime(),
1128 fGtuParam->GetAki(track->GetTrackletMask(), layer)));
1129 a += (((fGtuParam->GetAki(track->GetTrackletMask(), layer) * trk->GetYPrime()) >> 7) + 1) >> 1;
52c19022 1130 b += fGtuParam->GetBki(track->GetTrackletMask(), layer) * trk->GetYPrime() * fGtuParam->GetBinWidthY();
1131 c += fGtuParam->GetCki(track->GetTrackletMask(), layer) * trk->GetYPrime() * fGtuParam->GetBinWidthY();
1132 }
1133 if (a < 0)
1134 a += 3;
1135 a = a >> 2;
1136
ec5db61b 1137 track->SetFitParams(a << 2, b, c);
52c19022 1138
d2c8b010 1139 fGtuParam->GetIntersectionPoints(track->GetTrackletMask(), x1, x2);
1140
ec5db61b 1141 AliDebug(5,Form(" Track parameters: a16 = %i, a18 = %i, b = %f, c = %f, x1 = %f, x2 = %f, pt = %f (trkl mask: %i)",
1142 a, a << 2, b, c, x1, x2, track->GetPt(), track->GetTrackletMask()));
d2c8b010 1143
52c19022 1144 return kTRUE;
1145}
1146
52c19022 1147
6419bebb 1148Bool_t AliTRDgtuTMU::Uniquifier(const TList *inlist, TList *outlist)
52c19022 1149{
36dc3337 1150 // remove multiple occurences of the same track
1151
52c19022 1152 TIter next(inlist);
1153 AliTRDtrackGTU *trkStage0 = 0x0;
1154 AliTRDtrackGTU *trkStage1 = 0x0;
1155
1156 do {
a3461d38 1157 if (trkStage0 != trkStage1)
1158 delete trkStage0;
1159
52c19022 1160 trkStage0 = (AliTRDtrackGTU*) next();
1161
36dc3337 1162 Bool_t tracksEqual = kFALSE;
52c19022 1163 if (trkStage0 != 0 && trkStage1 != 0) {
1164 for (Int_t layer = 0; layer < fGtuParam->GetNLayers(); layer++) {
1165 if (trkStage0->GetTrackletIndex(layer) != -1 && trkStage0->GetTrackletIndex(layer) == trkStage1->GetTrackletIndex(layer)) {
36dc3337 1166 tracksEqual = kTRUE;
52c19022 1167 break;
1168 }
1169 }
1170 }
1171
36dc3337 1172 if (tracksEqual) {
a3461d38 1173 if (trkStage0->GetNTracklets() >= trkStage1->GetNTracklets()) {
1174 delete trkStage1;
1175 trkStage1 = trkStage0;
1176 }
5f006bd7 1177 }
52c19022 1178 else {
5f006bd7 1179 if (trkStage1 != 0x0)
52c19022 1180 outlist->Add(trkStage1);
1181 trkStage1 = trkStage0;
5f006bd7 1182 }
1183
52c19022 1184 } while (trkStage1 != 0x0);
1185 return kTRUE;
1186}