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Adding possibility to change the tracking window in ctgTheta
[u/mrichter/AliRoot.git] / TPC / AliTPCclustererMI.cxx
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1c53abe2 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
88cb7938 16/* $Id$ */
1c53abe2 17
18//-------------------------------------------------------
19// Implementation of the TPC clusterer
20//
21// Origin: Marian Ivanov
22//-------------------------------------------------------
23
d7a11555 24#include "AliTPCReconstructor.h"
1c53abe2 25#include "AliTPCclustererMI.h"
26#include "AliTPCclusterMI.h"
27#include <TObjArray.h>
28#include <TFile.h>
29#include "AliTPCClustersArray.h"
30#include "AliTPCClustersRow.h"
f8aae377 31#include "AliTPCRawStream.h"
1c53abe2 32#include "AliDigits.h"
33#include "AliSimDigits.h"
34#include "AliTPCParam.h"
f8aae377 35#include "AliRawReader.h"
36#include "AliTPCRawStream.h"
37#include "AliRunLoader.h"
38#include "AliLoader.h"
cc5e9db0 39#include "Riostream.h"
1c53abe2 40#include <TTree.h>
41
42ClassImp(AliTPCclustererMI)
43
44
45
f8aae377 46AliTPCclustererMI::AliTPCclustererMI(const AliTPCParam* par)
1c53abe2 47{
48 fInput =0;
49 fOutput=0;
f8aae377 50 fParam = par;
1c53abe2 51}
52void AliTPCclustererMI::SetInput(TTree * tree)
53{
54 //
55 // set input tree with digits
56 //
57 fInput = tree;
58 if (!fInput->GetBranch("Segment")){
59 cerr<<"AliTPC::Digits2Clusters(): no porper input tree !\n";
60 fInput=0;
61 return;
62 }
63}
64
65void AliTPCclustererMI::SetOutput(TTree * tree)
66{
67 //
68 //
69 fOutput= tree;
70 AliTPCClustersRow clrow;
71 AliTPCClustersRow *pclrow=&clrow;
72 clrow.SetClass("AliTPCclusterMI");
73 clrow.SetArray(1); // to make Clones array
74 fOutput->Branch("Segment","AliTPCClustersRow",&pclrow,32000,200);
75}
76
77
78Float_t AliTPCclustererMI::GetSigmaY2(Int_t iz){
79 // sigma y2 = in digits - we don't know the angle
80 Float_t z = iz*fParam->GetZWidth();
81 Float_t sd2 = (z*fParam->GetDiffL()*fParam->GetDiffL())/
82 (fPadWidth*fPadWidth);
83 Float_t sres = 0.25;
84 Float_t res = sd2+sres;
85 return res;
86}
87
88
89Float_t AliTPCclustererMI::GetSigmaZ2(Int_t iz){
90 //sigma z2 = in digits - angle estimated supposing vertex constraint
91 Float_t z = iz*fZWidth;
92 Float_t sd2 = (z*fParam->GetDiffL()*fParam->GetDiffL())/(fZWidth*fZWidth);
93 Float_t angular = fPadLength*(fParam->GetZLength()-z)/(fRx*fZWidth);
94 angular*=angular;
95 angular/=12.;
96 Float_t sres = fParam->GetZSigma()/fZWidth;
97 sres *=sres;
98 Float_t res = angular +sd2+sres;
99 return res;
100}
101
176aff27 102void AliTPCclustererMI::MakeCluster(Int_t k,Int_t max,Int_t *bins, UInt_t /*m*/,
1c53abe2 103AliTPCclusterMI &c)
104{
105 Int_t i0=k/max; //central pad
106 Int_t j0=k%max; //central time bin
107
108 // set pointers to data
109 //Int_t dummy[5] ={0,0,0,0,0};
110 Int_t * matrix[5]; //5x5 matrix with digits - indexing i = 0 ..4 j = -2..2
111 Int_t * resmatrix[5];
112 for (Int_t di=-2;di<=2;di++){
113 matrix[di+2] = &bins[k+di*max];
114 resmatrix[di+2] = &fResBins[k+di*max];
115 }
116 //build matrix with virtual charge
117 Float_t sigmay2= GetSigmaY2(j0);
118 Float_t sigmaz2= GetSigmaZ2(j0);
119
120 Float_t vmatrix[5][5];
121 vmatrix[2][2] = matrix[2][0];
122 c.SetType(0);
123 c.SetMax(Short_t(vmatrix[2][2])); // write maximal amplitude
124 for (Int_t di =-1;di <=1;di++)
125 for (Int_t dj =-1;dj <=1;dj++){
126 Float_t amp = matrix[di+2][dj];
127 if ( (amp<2) && (fLoop<2)){
128 // if under threshold - calculate virtual charge
129 Float_t ratio = TMath::Exp(-1.2*TMath::Abs(di)/sigmay2)*TMath::Exp(-1.2*TMath::Abs(dj)/sigmaz2);
130 amp = ((matrix[2][0]-2)*(matrix[2][0]-2)/(matrix[-di+2][-dj]+2))*ratio;
131 if (amp>2) amp = 2;
132 vmatrix[2+di][2+dj]=amp;
133 vmatrix[2+2*di][2+2*dj]=0;
134 if ( (di*dj)!=0){
135 //DIAGONAL ELEMENTS
136 vmatrix[2+2*di][2+dj] =0;
137 vmatrix[2+di][2+2*dj] =0;
138 }
139 continue;
140 }
141 if (amp<4){
142 //if small amplitude - below 2 x threshold - don't consider other one
143 vmatrix[2+di][2+dj]=amp;
144 vmatrix[2+2*di][2+2*dj]=0; // don't take to the account next bin
145 if ( (di*dj)!=0){
146 //DIAGONAL ELEMENTS
147 vmatrix[2+2*di][2+dj] =0;
148 vmatrix[2+di][2+2*dj] =0;
149 }
150 continue;
151 }
152 //if bigger then take everything
153 vmatrix[2+di][2+dj]=amp;
154 vmatrix[2+2*di][2+2*dj]= matrix[2*di+2][2*dj] ;
155 if ( (di*dj)!=0){
156 //DIAGONAL ELEMENTS
157 vmatrix[2+2*di][2+dj] = matrix[2*di+2][dj];
158 vmatrix[2+di][2+2*dj] = matrix[2+di][dj*2];
159 }
160 }
161
162
163
164 Float_t sumw=0;
165 Float_t sumiw=0;
166 Float_t sumi2w=0;
167 Float_t sumjw=0;
168 Float_t sumj2w=0;
169 //
170 for (Int_t i=-2;i<=2;i++)
171 for (Int_t j=-2;j<=2;j++){
172 Float_t amp = vmatrix[i+2][j+2];
173
174 sumw += amp;
175 sumiw += i*amp;
176 sumi2w += i*i*amp;
177 sumjw += j*amp;
178 sumj2w += j*j*amp;
179 }
180 //
181 Float_t meani = sumiw/sumw;
182 Float_t mi2 = sumi2w/sumw-meani*meani;
183 Float_t meanj = sumjw/sumw;
184 Float_t mj2 = sumj2w/sumw-meanj*meanj;
185 //
186 Float_t ry = mi2/sigmay2;
187 Float_t rz = mj2/sigmaz2;
188
189 //
190 if ( ( (ry<0.6) || (rz<0.6) ) && fLoop==2) return;
191 if ( (ry <1.2) && (rz<1.2) ) {
192 //if cluster looks like expected
193 //+1.2 deviation from expected sigma accepted
194 // c.fMax = FitMax(vmatrix,meani,meanj,TMath::Sqrt(sigmay2),TMath::Sqrt(sigmaz2));
195
196 meani +=i0;
197 meanj +=j0;
198 //set cluster parameters
199 c.SetQ(sumw);
200 c.SetY(meani*fPadWidth);
201 c.SetZ(meanj*fZWidth);
202 c.SetSigmaY2(mi2);
203 c.SetSigmaZ2(mj2);
204 AddCluster(c);
205 //remove cluster data from data
206 for (Int_t di=-2;di<=2;di++)
207 for (Int_t dj=-2;dj<=2;dj++){
208 resmatrix[di+2][dj] -= Int_t(vmatrix[di+2][dj+2]);
209 if (resmatrix[di+2][dj]<0) resmatrix[di+2][dj]=0;
210 }
211 resmatrix[2][0] =0;
212 return;
213 }
214 //
215 //unfolding when neccessary
216 //
217
218 Int_t * matrix2[7]; //7x7 matrix with digits - indexing i = 0 ..6 j = -3..3
219 Int_t dummy[7]={0,0,0,0,0,0};
220 for (Int_t di=-3;di<=3;di++){
221 matrix2[di+3] = &bins[k+di*max];
222 if ((k+di*max)<3) matrix2[di+3] = &dummy[3];
223 if ((k+di*max)>fMaxBin-3) matrix2[di+3] = &dummy[3];
224 }
225 Float_t vmatrix2[5][5];
226 Float_t sumu;
227 Float_t overlap;
228 UnfoldCluster(matrix2,vmatrix2,meani,meanj,sumu,overlap);
229 //
230 // c.fMax = FitMax(vmatrix2,meani,meanj,TMath::Sqrt(sigmay2),TMath::Sqrt(sigmaz2));
231 meani +=i0;
232 meanj +=j0;
233 //set cluster parameters
234 c.SetQ(sumu);
235 c.SetY(meani*fPadWidth);
236 c.SetZ(meanj*fZWidth);
237 c.SetSigmaY2(mi2);
238 c.SetSigmaZ2(mj2);
239 c.SetType(Char_t(overlap)+1);
240 AddCluster(c);
241
242 //unfolding 2
243 meani-=i0;
244 meanj-=j0;
245 if (gDebug>4)
246 printf("%f\t%f\n", vmatrix2[2][2], vmatrix[2][2]);
247}
248
249
250
251void AliTPCclustererMI::UnfoldCluster(Int_t * matrix2[7], Float_t recmatrix[5][5], Float_t & meani, Float_t & meanj,
252 Float_t & sumu, Float_t & overlap )
253{
254 //
255 //unfold cluster from input matrix
256 //data corresponding to cluster writen in recmatrix
257 //output meani and meanj
258
259 //take separatelly y and z
260
261 Float_t sum3i[7] = {0,0,0,0,0,0,0};
262 Float_t sum3j[7] = {0,0,0,0,0,0,0};
263
264 for (Int_t k =0;k<7;k++)
265 for (Int_t l = -1; l<=1;l++){
266 sum3i[k]+=matrix2[k][l];
267 sum3j[k]+=matrix2[l+3][k-3];
268 }
269 Float_t mratio[3][3]={{1,1,1},{1,1,1},{1,1,1}};
270 //
271 //unfold y
272 Float_t sum3wi = 0; //charge minus overlap
273 Float_t sum3wio = 0; //full charge
274 Float_t sum3iw = 0; //sum for mean value
275 for (Int_t dk=-1;dk<=1;dk++){
276 sum3wio+=sum3i[dk+3];
277 if (dk==0){
278 sum3wi+=sum3i[dk+3];
279 }
280 else{
281 Float_t ratio =1;
282 if ( ( ((sum3i[dk+3]+3)/(sum3i[3]-3))+1 < (sum3i[2*dk+3]-3)/(sum3i[dk+3]+3))||
283 sum3i[dk+3]<=sum3i[2*dk+3] && sum3i[dk+3]>2 ){
284 Float_t xm2 = sum3i[-dk+3];
285 Float_t xm1 = sum3i[+3];
286 Float_t x1 = sum3i[2*dk+3];
287 Float_t x2 = sum3i[3*dk+3];
cc5e9db0 288 Float_t w11 = TMath::Max((Float_t)(4.*xm1-xm2),(Float_t)0.000001);
289 Float_t w12 = TMath::Max((Float_t)(4 *x1 -x2),(Float_t)0.);
1c53abe2 290 ratio = w11/(w11+w12);
291 for (Int_t dl=-1;dl<=1;dl++)
292 mratio[dk+1][dl+1] *= ratio;
293 }
294 Float_t amp = sum3i[dk+3]*ratio;
295 sum3wi+=amp;
296 sum3iw+= dk*amp;
297 }
298 }
299 meani = sum3iw/sum3wi;
300 Float_t overlapi = (sum3wio-sum3wi)/sum3wio;
301
302
303
304 //unfold z
305 Float_t sum3wj = 0; //charge minus overlap
306 Float_t sum3wjo = 0; //full charge
307 Float_t sum3jw = 0; //sum for mean value
308 for (Int_t dk=-1;dk<=1;dk++){
309 sum3wjo+=sum3j[dk+3];
310 if (dk==0){
311 sum3wj+=sum3j[dk+3];
312 }
313 else{
314 Float_t ratio =1;
315 if ( ( ((sum3j[dk+3]+3)/(sum3j[3]-3))+1 < (sum3j[2*dk+3]-3)/(sum3j[dk+3]+3)) ||
316 (sum3j[dk+3]<=sum3j[2*dk+3] && sum3j[dk+3]>2)){
317 Float_t xm2 = sum3j[-dk+3];
318 Float_t xm1 = sum3j[+3];
319 Float_t x1 = sum3j[2*dk+3];
320 Float_t x2 = sum3j[3*dk+3];
cc5e9db0 321 Float_t w11 = TMath::Max((Float_t)(4.*xm1-xm2),(Float_t)0.000001);
322 Float_t w12 = TMath::Max((Float_t)(4 *x1 -x2),(Float_t)0.);
1c53abe2 323 ratio = w11/(w11+w12);
324 for (Int_t dl=-1;dl<=1;dl++)
325 mratio[dl+1][dk+1] *= ratio;
326 }
327 Float_t amp = sum3j[dk+3]*ratio;
328 sum3wj+=amp;
329 sum3jw+= dk*amp;
330 }
331 }
332 meanj = sum3jw/sum3wj;
333 Float_t overlapj = (sum3wjo-sum3wj)/sum3wjo;
334 overlap = Int_t(100*TMath::Max(overlapi,overlapj)+3);
335 sumu = (sum3wj+sum3wi)/2.;
336
337 if (overlap ==3) {
338 //if not overlap detected remove everything
339 for (Int_t di =-2; di<=2;di++)
340 for (Int_t dj =-2; dj<=2;dj++){
341 recmatrix[di+2][dj+2] = matrix2[3+di][dj];
342 }
343 }
344 else{
345 for (Int_t di =-1; di<=1;di++)
346 for (Int_t dj =-1; dj<=1;dj++){
347 Float_t ratio =1;
348 if (mratio[di+1][dj+1]==1){
349 recmatrix[di+2][dj+2] = matrix2[3+di][dj];
350 if (TMath::Abs(di)+TMath::Abs(dj)>1){
351 recmatrix[2*di+2][dj+2] = matrix2[3+2*di][dj];
352 recmatrix[di+2][2*dj+2] = matrix2[3+di][2*dj];
353 }
354 recmatrix[2*di+2][2*dj+2] = matrix2[3+2*di][2*dj];
355 }
356 else
357 {
358 //if we have overlap in direction
359 recmatrix[di+2][dj+2] = mratio[di+1][dj+1]* matrix2[3+di][dj];
360 if (TMath::Abs(di)+TMath::Abs(dj)>1){
cc5e9db0 361 ratio = TMath::Min((Float_t)(recmatrix[di+2][dj+2]/(matrix2[3+0*di][1*dj]+1)),(Float_t)1.);
1c53abe2 362 recmatrix[2*di+2][dj+2] = ratio*recmatrix[di+2][dj+2];
363 //
cc5e9db0 364 ratio = TMath::Min((Float_t)(recmatrix[di+2][dj+2]/(matrix2[3+1*di][0*dj]+1)),(Float_t)1.);
1c53abe2 365 recmatrix[di+2][2*dj+2] = ratio*recmatrix[di+2][dj+2];
366 }
367 else{
368 ratio = recmatrix[di+2][dj+2]/matrix2[3][0];
369 recmatrix[2*di+2][2*dj+2] = ratio*recmatrix[di+2][dj+2];
370 }
371 }
372 }
373 }
374 if (gDebug>4)
375 printf("%f\n", recmatrix[2][2]);
376
377}
378
379Float_t AliTPCclustererMI::FitMax(Float_t vmatrix[5][5], Float_t y, Float_t z, Float_t sigmay, Float_t sigmaz)
380{
381 //
382 // estimate max
383 Float_t sumteor= 0;
384 Float_t sumamp = 0;
385
386 for (Int_t di = -1;di<=1;di++)
387 for (Int_t dj = -1;dj<=1;dj++){
388 if (vmatrix[2+di][2+dj]>2){
389 Float_t teor = TMath::Gaus(di,y,sigmay*1.2)*TMath::Gaus(dj,z,sigmaz*1.2);
390 sumteor += teor*vmatrix[2+di][2+dj];
391 sumamp += vmatrix[2+di][2+dj]*vmatrix[2+di][2+dj];
392 }
393 }
394 Float_t max = sumamp/sumteor;
395 return max;
396}
397
398void AliTPCclustererMI::AddCluster(AliTPCclusterMI &c){
399 //
400 // transform cluster to the global coordinata
401 // add the cluster to the array
402 //
403 Float_t meani = c.GetY()/fPadWidth;
404 Float_t meanj = c.GetZ()/fZWidth;
405
406 Int_t ki = TMath::Nint(meani-3);
407 if (ki<0) ki=0;
408 if (ki>=fMaxPad) ki = fMaxPad-1;
409 Int_t kj = TMath::Nint(meanj-3);
410 if (kj<0) kj=0;
411 if (kj>=fMaxTime-3) kj=fMaxTime-4;
412 // ki and kj shifted to "real" coordinata
f8aae377 413 if (fRowDig) {
414 c.SetLabel(fRowDig->GetTrackIDFast(kj,ki,0)-2,0);
415 c.SetLabel(fRowDig->GetTrackIDFast(kj,ki,1)-2,1);
416 c.SetLabel(fRowDig->GetTrackIDFast(kj,ki,2)-2,2);
417 }
1c53abe2 418
419
420 Float_t s2 = c.GetSigmaY2();
421 Float_t w=fParam->GetPadPitchWidth(fSector);
422
423 c.SetSigmaY2(s2*w*w);
424 s2 = c.GetSigmaZ2();
425 w=fZWidth;
426 c.SetSigmaZ2(s2*w*w);
427 c.SetY((meani - 2.5 - 0.5*fMaxPad)*fParam->GetPadPitchWidth(fSector));
428 c.SetZ(fZWidth*(meanj-3));
429 c.SetZ(c.GetZ() - 3.*fParam->GetZSigma()); // PASA delay
430 c.SetZ(fSign*(fParam->GetZLength() - c.GetZ()));
431
432 if (ki<=1 || ki>=fMaxPad-1 || kj==1 || kj==fMaxTime-2) {
433 //c.SetSigmaY2(c.GetSigmaY2()*25.);
434 //c.SetSigmaZ2(c.GetSigmaZ2()*4.);
435 c.SetType(-(c.GetType()+3)); //edge clusters
436 }
437 if (fLoop==2) c.SetType(100);
438
439 TClonesArray * arr = fRowCl->GetArray();
45bcf167 440 // AliTPCclusterMI * cl =
441 new ((*arr)[fNcluster]) AliTPCclusterMI(c);
1c53abe2 442
443 fNcluster++;
444}
445
446
447//_____________________________________________________________________________
f8aae377 448void AliTPCclustererMI::Digits2Clusters()
1c53abe2 449{
450 //-----------------------------------------------------------------
451 // This is a simple cluster finder.
452 //-----------------------------------------------------------------
1c53abe2 453
f8aae377 454 if (!fInput) {
455 Error("Digits2Clusters", "input tree not initialised");
1c53abe2 456 return;
457 }
458
f8aae377 459 if (!fOutput) {
460 Error("Digits2Clusters", "output tree not initialised");
461 return;
1c53abe2 462 }
463
464 AliSimDigits digarr, *dummy=&digarr;
465 fRowDig = dummy;
466 fInput->GetBranch("Segment")->SetAddress(&dummy);
467 Stat_t nentries = fInput->GetEntries();
468
f8aae377 469 fMaxTime=fParam->GetMaxTBin()+6; // add 3 virtual time bins before and 3 after
1c53abe2 470
1c53abe2 471 Int_t nclusters = 0;
472
473 for (Int_t n=0; n<nentries; n++) {
474 fInput->GetEvent(n);
475 Int_t row;
f8aae377 476 if (!fParam->AdjustSectorRow(digarr.GetID(),fSector,row)) {
1c53abe2 477 cerr<<"AliTPC warning: invalid segment ID ! "<<digarr.GetID()<<endl;
478 continue;
479 }
480
481 AliTPCClustersRow *clrow= new AliTPCClustersRow();
482 fRowCl = clrow;
483 clrow->SetClass("AliTPCclusterMI");
484 clrow->SetArray(1);
485
486 clrow->SetID(digarr.GetID());
487 fOutput->GetBranch("Segment")->SetAddress(&clrow);
f8aae377 488 fRx=fParam->GetPadRowRadii(fSector,row);
1c53abe2 489
490
f8aae377 491 const Int_t kNIS=fParam->GetNInnerSector(), kNOS=fParam->GetNOuterSector();
1c53abe2 492 fZWidth = fParam->GetZWidth();
493 if (fSector < kNIS) {
f8aae377 494 fMaxPad = fParam->GetNPadsLow(row);
1c53abe2 495 fSign = (fSector < kNIS/2) ? 1 : -1;
f8aae377 496 fPadLength = fParam->GetPadPitchLength(fSector,row);
497 fPadWidth = fParam->GetPadPitchWidth();
1c53abe2 498 } else {
f8aae377 499 fMaxPad = fParam->GetNPadsUp(row);
1c53abe2 500 fSign = ((fSector-kNIS) < kNOS/2) ? 1 : -1;
f8aae377 501 fPadLength = fParam->GetPadPitchLength(fSector,row);
502 fPadWidth = fParam->GetPadPitchWidth();
1c53abe2 503 }
504
505
506 fMaxBin=fMaxTime*(fMaxPad+6); // add 3 virtual pads before and 3 after
507 fBins =new Int_t[fMaxBin];
508 fResBins =new Int_t[fMaxBin]; //fBins with residuals after 1 finder loop
509 memset(fBins,0,sizeof(Int_t)*fMaxBin);
510
511 if (digarr.First()) //MI change
512 do {
513 Short_t dig=digarr.CurrentDigit();
f8aae377 514 if (dig<=fParam->GetZeroSup()) continue;
1c53abe2 515 Int_t j=digarr.CurrentRow()+3, i=digarr.CurrentColumn()+3;
516 fBins[i*fMaxTime+j]=dig;
517 } while (digarr.Next());
518 digarr.ExpandTrackBuffer();
519
f8aae377 520 FindClusters();
8569a2b0 521
522 fOutput->Fill();
88cb7938 523 delete clrow;
524 nclusters+=fNcluster;
8569a2b0 525 delete[] fBins;
526 delete[] fResBins;
88cb7938 527 }
f8aae377 528
19dd5b2f 529 Info("Digits2Clusters", "Number of found clusters : %d", nclusters);
f8aae377 530}
531
532void AliTPCclustererMI::Digits2Clusters(AliRawReader* rawReader)
533{
534//-----------------------------------------------------------------
535// This is a cluster finder for raw data.
536//-----------------------------------------------------------------
537
538 if (!fOutput) {
539 Error("Digits2Clusters", "output tree not initialised");
540 return;
541 }
542
543 rawReader->Reset();
544 AliTPCRawStream input(rawReader);
545
546 fRowDig = NULL;
547
548 Int_t nclusters = 0;
88cb7938 549
f8aae377 550 fMaxTime = fParam->GetMaxTBin() + 6; // add 3 virtual time bins before and 3 after
551 const Int_t kNIS = fParam->GetNInnerSector();
552 const Int_t kNOS = fParam->GetNOuterSector();
553 const Int_t kNS = kNIS + kNOS;
554 fZWidth = fParam->GetZWidth();
555 Int_t zeroSup = fParam->GetZeroSup();
556
557 fBins = NULL;
558 Int_t** splitRows = new Int_t* [kNS*2];
559 Int_t** splitRowsRes = new Int_t* [kNS*2];
560 for (Int_t iSector = 0; iSector < kNS*2; iSector++)
561 splitRows[iSector] = NULL;
562 Int_t iSplitRow = -1;
563
564 Bool_t next = kTRUE;
565 while (next) {
566 next = input.Next();
567
568 // when the sector or row number has changed ...
569 if (input.IsNewRow() || !next) {
570
571 // ... find clusters in the previous pad row, and ...
572 if (fBins) {
573 if ((iSplitRow < 0) || splitRows[fSector + kNS*iSplitRow]) {
574 fRowCl = new AliTPCClustersRow;
575 fRowCl->SetClass("AliTPCclusterMI");
576 fRowCl->SetArray(1);
577 fRowCl->SetID(fParam->GetIndex(fSector, input.GetPrevRow()));
578 fOutput->GetBranch("Segment")->SetAddress(&fRowCl);
579
580 FindClusters();
581
582 fOutput->Fill();
583 delete fRowCl;
584 nclusters += fNcluster;
585 delete[] fBins;
586 delete[] fResBins;
587 if (iSplitRow >= 0) splitRows[fSector + kNS*iSplitRow] = NULL;
588
589 } else if (iSplitRow >= 0) {
590 splitRows[fSector + kNS*iSplitRow] = fBins;
591 splitRowsRes[fSector + kNS*iSplitRow] = fResBins;
592 }
593 }
594
595 if (!next) break;
596
597 // ... prepare for the next pad row
598 fSector = input.GetSector();
599 Int_t iRow = input.GetRow();
600 fRx = fParam->GetPadRowRadii(fSector, iRow);
601
602 iSplitRow = -1;
603 if (fSector < kNIS) {
604 fMaxPad = fParam->GetNPadsLow(iRow);
605 fSign = (fSector < kNIS/2) ? 1 : -1;
606 if (iRow == 30) iSplitRow = 0;
607 } else {
608 fMaxPad = fParam->GetNPadsUp(iRow);
609 fSign = ((fSector-kNIS) < kNOS/2) ? 1 : -1;
610 if (iRow == 27) iSplitRow = 0;
611 else if (iRow == 76) iSplitRow = 1;
612 }
613 fPadLength = fParam->GetPadPitchLength(fSector, iRow);
614 fPadWidth = fParam->GetPadPitchWidth();
615
616 fMaxBin = fMaxTime*(fMaxPad+6); // add 3 virtual pads before and 3 after
617 if ((iSplitRow < 0) || !splitRows[fSector + kNS*iSplitRow]) {
618 fBins = new Int_t[fMaxBin];
619 fResBins = new Int_t[fMaxBin]; //fBins with residuals after 1 finder loop
620 memset(fBins, 0, sizeof(Int_t)*fMaxBin);
621 } else {
622 fBins = splitRows[fSector + kNS*iSplitRow];
623 fResBins = splitRowsRes[fSector + kNS*iSplitRow];
624 }
625 }
626
627 // fill fBins with digits data
628 if (input.GetSignal() <= zeroSup) continue;
629 Int_t i = input.GetPad() + 3;
630 Int_t j = input.GetTime() + 3;
631 fBins[i*fMaxTime+j] = input.GetSignal();
632 }
633
634 // find clusters in split rows that were skipped until now.
635 // this can happen if the rows were not splitted
636 for (fSector = 0; fSector < kNS; fSector++)
637 for (Int_t iSplit = 0; iSplit < 2; iSplit++)
638 if (splitRows[fSector + kNS*iSplit]) {
639
640 Int_t iRow = -1;
641 if (fSector < kNIS) {
642 iRow = 30;
643 fMaxPad = fParam->GetNPadsLow(iRow);
644 fSign = (fSector < kNIS/2) ? 1 : -1;
645 } else {
646 if (iSplit == 0) iRow = 27; else iRow = 76;
647 fMaxPad = fParam->GetNPadsUp(iRow);
648 fSign = ((fSector-kNIS) < kNOS/2) ? 1 : -1;
649 }
650 fRx = fParam->GetPadRowRadii(fSector, iRow);
651 fPadLength = fParam->GetPadPitchLength(fSector, iRow);
652 fPadWidth = fParam->GetPadPitchWidth();
653
654 fMaxBin = fMaxTime*(fMaxPad+6); // add 3 virtual pads before and 3 after
655 fBins = splitRows[fSector + kNS*iSplit];
656 fResBins = splitRowsRes[fSector + kNS*iSplit];
657
658 fRowCl = new AliTPCClustersRow;
659 fRowCl->SetClass("AliTPCclusterMI");
660 fRowCl->SetArray(1);
661 fRowCl->SetID(fParam->GetIndex(fSector, iRow));
662 fOutput->GetBranch("Segment")->SetAddress(&fRowCl);
663
664 FindClusters();
665
666 fOutput->Fill();
667 delete fRowCl;
668 nclusters += fNcluster;
669 delete[] fBins;
670 delete[] fResBins;
671 }
672
673 delete[] splitRows;
674 delete[] splitRowsRes;
675 Info("Digits2Clusters", "Number of found clusters : %d\n", nclusters);
676}
677
678void AliTPCclustererMI::FindClusters()
679{
680 //add virtual charge at the edge
681 for (Int_t i=0; i<fMaxTime; i++){
682 Float_t amp1 = fBins[i+3*fMaxTime];
683 Float_t amp0 =0;
684 if (amp1>0){
685 Float_t amp2 = fBins[i+4*fMaxTime];
686 if (amp2==0) amp2=0.5;
687 Float_t sigma2 = GetSigmaY2(i);
688 amp0 = (amp1*amp1/amp2)*TMath::Exp(-1./sigma2);
689 if (gDebug>4) printf("\n%f\n",amp0);
690 }
691 fBins[i+2*fMaxTime] = Int_t(amp0);
692 amp0 = 0;
693 amp1 = fBins[(fMaxPad+2)*fMaxTime+i];
694 if (amp1>0){
695 Float_t amp2 = fBins[i+(fMaxPad+1)*fMaxTime];
696 if (amp2==0) amp2=0.5;
697 Float_t sigma2 = GetSigmaY2(i);
698 amp0 = (amp1*amp1/amp2)*TMath::Exp(-1./sigma2);
699 if (gDebug>4) printf("\n%f\n",amp0);
700 }
701 fBins[(fMaxPad+3)*fMaxTime+i] = Int_t(amp0);
702 }
703
704// memcpy(fResBins,fBins, fMaxBin*2);
705 memcpy(fResBins,fBins, fMaxBin);
706 //
707 fNcluster=0;
708 //first loop - for "gold cluster"
709 fLoop=1;
710 Int_t *b=&fBins[-1]+2*fMaxTime;
d7a11555 711 Int_t crtime = Int_t((fParam->GetZLength()-AliTPCReconstructor::GetCtgRange()*fRx)/fZWidth-5);
f8aae377 712
713 for (Int_t i=2*fMaxTime; i<fMaxBin-2*fMaxTime; i++) {
714 b++;
715 if (*b<8) continue; //threshold form maxima
716 if (i%fMaxTime<crtime) {
717 Int_t delta = -(i%fMaxTime)+crtime;
718 b+=delta;
719 i+=delta;
720 continue;
721 }
722
723 if (!IsMaximum(*b,fMaxTime,b)) continue;
724 AliTPCclusterMI c;
725 Int_t dummy=0;
726 MakeCluster(i, fMaxTime, fBins, dummy,c);
727 //}
728 }
729 //memcpy(fBins,fResBins, fMaxBin*2);
730 //second loop - for rest cluster
731 /*
732 fLoop=2;
733 b=&fResBins[-1]+2*fMaxTime;
734 for (Int_t i=2*fMaxTime; i<fMaxBin-2*fMaxTime; i++) {
735 b++;
736 if (*b<25) continue; // bigger threshold for maxima
737 if (!IsMaximum(*b,fMaxTime,b)) continue;
738 AliTPCclusterMI c;
739 Int_t dummy;
740 MakeCluster(i, fMaxTime, fResBins, dummy,c);
741 //}
742 }
743 */
8569a2b0 744}