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7f167a74 | 1 | // $Id: AliHLTITSVertexerSPDComponent.cxx 32659 2009-06-02 16:08:40Z sgorbuno $ |
2 | // ************************************************************************** | |
3 | // This file is property of and copyright by the ALICE HLT Project * | |
4 | // ALICE Experiment at CERN, All rights reserved. * | |
5 | // * | |
6 | // Primary Authors: Sergey Gorbunov <sergey.gorbunov@kip.uni-heidelberg.de> * | |
7 | // Ivan Kisel <kisel@kip.uni-heidelberg.de> * | |
8 | // for The ALICE HLT Project. * | |
9 | // * | |
10 | // Permission to use, copy, modify and distribute this software and its * | |
11 | // documentation strictly for non-commercial purposes is hereby granted * | |
12 | // without fee, provided that the above copyright notice appears in all * | |
13 | // copies and that both the copyright notice and this permission notice * | |
14 | // appear in the supporting documentation. The authors make no claims * | |
15 | // about the suitability of this software for any purpose. It is * | |
16 | // provided "as is" without express or implied warranty. * | |
17 | // * | |
18 | //*************************************************************************** | |
19 | ||
20 | /// @file AliHLTITSVertexerSPDComponent.cxx | |
21 | /// @author Sergey Gorbunov <sergey.gorbunov@kip.uni-heidelberg.de> | |
22 | /// @date June 2009 | |
23 | /// @brief An ITS tracker processing component for the HLT | |
24 | ||
25 | ||
26 | ///////////////////////////////////////////////////// | |
27 | // // | |
28 | // a ITS tracker processing component for the HLT // | |
29 | // // | |
30 | ///////////////////////////////////////////////////// | |
31 | ||
32 | #if __GNUC__>= 3 | |
33 | using namespace std; | |
34 | #endif | |
35 | ||
36 | #include "AliHLTITSVertexerSPDComponent.h" | |
37 | #include "AliHLTArray.h" | |
38 | #include "AliExternalTrackParam.h" | |
39 | #include "TStopwatch.h" | |
40 | #include "TMath.h" | |
41 | #include "AliCDBEntry.h" | |
42 | #include "AliCDBManager.h" | |
43 | #include "AliGeomManager.h" | |
44 | #include "TObjString.h" | |
45 | #include "TObjArray.h" | |
46 | #include "AliITStrackerHLT.h" | |
47 | #include "AliHLTITSSpacePointData.h" | |
48 | #include "AliHLTITSClusterDataFormat.h" | |
49 | #include "AliHLTDataTypes.h" | |
50 | #include "AliHLTExternalTrackParam.h" | |
51 | #include "AliHLTGlobalBarrelTrack.h" | |
52 | #include "AliGeomManager.h" | |
7f167a74 | 53 | #include "AliESDVertex.h" |
54 | ||
55 | /** ROOT macro for the implementation of ROOT specific class methods */ | |
56 | ClassImp( AliHLTITSVertexerSPDComponent ) | |
57 | AliHLTITSVertexerSPDComponent::AliHLTITSVertexerSPDComponent() | |
58 | : | |
fb83175d | 59 | fZRange(40), |
60 | fZBinSize(1), | |
7f167a74 | 61 | fFullTime( 0 ), |
62 | fRecoTime( 0 ), | |
fb83175d | 63 | fNEvents( 0 ), |
64 | fSumW(0), | |
65 | fSumN(0), | |
66 | fZMin(0), | |
67 | fNZBins(0) | |
7f167a74 | 68 | { |
69 | // see header file for class documentation | |
70 | // or | |
71 | // refer to README to build package | |
72 | // or | |
73 | // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt | |
74 | ||
fb83175d | 75 | for( int i=0; i<9; i++ ) fSum[i] = 0; |
76 | ||
73912bf6 | 77 | fRunVtx[0] = 0; |
78 | fRunVtx[1] = 0; | |
79 | fRunVtx[2] = 0; | |
7f167a74 | 80 | } |
81 | ||
82 | AliHLTITSVertexerSPDComponent::AliHLTITSVertexerSPDComponent( const AliHLTITSVertexerSPDComponent& ) | |
83 | : | |
84 | AliHLTProcessor(), | |
fb83175d | 85 | fZRange(40), |
86 | fZBinSize(1), | |
7f167a74 | 87 | fFullTime( 0 ), |
88 | fRecoTime( 0 ), | |
fb83175d | 89 | fNEvents( 0 ), |
90 | fSumW(0), | |
91 | fSumN(0), | |
92 | fZMin(0), | |
93 | fNZBins(0) | |
7f167a74 | 94 | { |
95 | // see header file for class documentation | |
c6af1e27 | 96 | |
97 | for( int i=0; i<9; i++ ) fSum[i] = 0; | |
98 | ||
99 | fRunVtx[0] = 0; | |
100 | fRunVtx[1] = 0; | |
101 | fRunVtx[2] = 0; | |
102 | ||
7f167a74 | 103 | HLTFatal( "copy constructor untested" ); |
104 | } | |
105 | ||
106 | AliHLTITSVertexerSPDComponent& AliHLTITSVertexerSPDComponent::operator=( const AliHLTITSVertexerSPDComponent& ) | |
107 | { | |
108 | // see header file for class documentation | |
109 | HLTFatal( "assignment operator untested" ); | |
110 | return *this; | |
111 | } | |
112 | ||
113 | AliHLTITSVertexerSPDComponent::~AliHLTITSVertexerSPDComponent() | |
114 | { | |
fb83175d | 115 | // see header file for class documentation |
116 | for( int i=0; i<9; i++ ){ | |
117 | delete[] fSum[i]; | |
118 | fSum[i] = 0; | |
119 | } | |
120 | delete[] fSumW; | |
121 | delete[] fSumN; | |
7f167a74 | 122 | } |
123 | ||
124 | // | |
125 | // Public functions to implement AliHLTComponent's interface. | |
126 | // These functions are required for the registration process | |
127 | // | |
128 | ||
129 | const char* AliHLTITSVertexerSPDComponent::GetComponentID() | |
130 | { | |
131 | // see header file for class documentation | |
132 | return "ITSVertexerSPD"; | |
133 | } | |
134 | ||
135 | void AliHLTITSVertexerSPDComponent::GetInputDataTypes( vector<AliHLTComponentDataType>& list ) | |
136 | { | |
137 | // see header file for class documentation | |
138 | list.clear(); | |
139 | list.push_back( kAliHLTDataTypeClusters|kAliHLTDataOriginITSSPD ); | |
140 | } | |
141 | ||
142 | AliHLTComponentDataType AliHLTITSVertexerSPDComponent::GetOutputDataType() | |
143 | { | |
144 | // see header file for class documentation | |
145 | return kAliHLTMultipleDataType; | |
146 | } | |
147 | ||
148 | int AliHLTITSVertexerSPDComponent::GetOutputDataTypes(AliHLTComponentDataTypeList& tgtList) | |
149 | ||
150 | { | |
151 | // see header file for class documentation | |
152 | tgtList.clear(); | |
153 | tgtList.push_back( kAliHLTDataTypeESDVertex|kAliHLTDataOriginITS); | |
7f167a74 | 154 | return tgtList.size(); |
155 | } | |
156 | ||
157 | void AliHLTITSVertexerSPDComponent::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier ) | |
158 | { | |
159 | // define guess for the output data size | |
160 | constBase = 10000; // minimum size | |
161 | inputMultiplier = 0.5; // size relative to input | |
162 | } | |
163 | ||
164 | AliHLTComponent* AliHLTITSVertexerSPDComponent::Spawn() | |
165 | { | |
166 | // see header file for class documentation | |
167 | return new AliHLTITSVertexerSPDComponent; | |
168 | } | |
169 | ||
170 | void AliHLTITSVertexerSPDComponent::SetDefaultConfiguration() | |
171 | { | |
172 | // Set default configuration for the CA tracker component | |
173 | // Some parameters can be later overwritten from the OCDB | |
174 | ||
73912bf6 | 175 | fRunVtx[0] = 0; |
176 | fRunVtx[1] = 0; | |
177 | fRunVtx[2] = 0; | |
fb83175d | 178 | fZRange = 40; |
179 | fZBinSize = 1; | |
7f167a74 | 180 | fFullTime = 0; |
181 | fRecoTime = 0; | |
182 | fNEvents = 0; | |
183 | } | |
184 | ||
185 | int AliHLTITSVertexerSPDComponent::ReadConfigurationString( const char* arguments ) | |
186 | { | |
187 | // Set configuration parameters for the CA tracker component from the string | |
188 | ||
189 | int iResult = 0; | |
190 | if ( !arguments ) return iResult; | |
191 | ||
192 | TString allArgs = arguments; | |
193 | TString argument; | |
194 | int bMissingParam = 0; | |
195 | ||
196 | TObjArray* pTokens = allArgs.Tokenize( " " ); | |
197 | ||
198 | int nArgs = pTokens ? pTokens->GetEntries() : 0; | |
199 | ||
200 | for ( int i = 0; i < nArgs; i++ ) { | |
201 | argument = ( ( TObjString* )pTokens->At( i ) )->GetString(); | |
202 | if ( argument.IsNull() ) continue; | |
203 | ||
7f167a74 | 204 | if ( argument.CompareTo( "-runVertex" ) == 0 ) { |
205 | if ( ( bMissingParam = ( ++i >= pTokens->GetEntries() ) ) ) break; | |
73912bf6 | 206 | fRunVtx[0] = ( ( TObjString* )pTokens->At( i ) )->GetString().Atof(); |
7f167a74 | 207 | if ( ( bMissingParam = ( ++i >= pTokens->GetEntries() ) ) ) break; |
73912bf6 | 208 | fRunVtx[1] = ( ( TObjString* )pTokens->At( i ) )->GetString().Atof(); |
7f167a74 | 209 | if ( ( bMissingParam = ( ++i >= pTokens->GetEntries() ) ) ) break; |
73912bf6 | 210 | fRunVtx[2] = ( ( TObjString* )pTokens->At( i ) )->GetString().Atof(); |
211 | HLTInfo( "Default run vertex is set to (%f,%f,%f)",fRunVtx[0], | |
212 | fRunVtx[1],fRunVtx[2] ); | |
7f167a74 | 213 | continue; |
214 | } | |
215 | ||
fb83175d | 216 | if ( argument.CompareTo( "-zRange" ) == 0 ) { |
217 | if ( ( bMissingParam = ( ++i >= pTokens->GetEntries() ) ) ) break; | |
218 | fZRange = ( ( TObjString* )pTokens->At( i ) )->GetString().Atof(); | |
219 | HLTInfo( "Z range for the vertex search is set to +-%f cm", fZRange ); | |
220 | continue; | |
221 | } | |
222 | ||
223 | if ( argument.CompareTo( "-zBinSize" ) == 0 ) { | |
224 | if ( ( bMissingParam = ( ++i >= pTokens->GetEntries() ) ) ) break; | |
225 | fZBinSize = ( ( TObjString* )pTokens->At( i ) )->GetString().Atof(); | |
226 | HLTInfo( "Size of the Z bin for the vertex search is set to %f cm", fZBinSize ); | |
227 | continue; | |
228 | } | |
229 | ||
7f167a74 | 230 | HLTError( "Unknown option \"%s\"", argument.Data() ); |
231 | iResult = -EINVAL; | |
232 | } | |
233 | delete pTokens; | |
234 | ||
235 | if ( bMissingParam ) { | |
236 | HLTError( "Specifier missed for parameter \"%s\"", argument.Data() ); | |
237 | iResult = -EINVAL; | |
238 | } | |
239 | ||
240 | return iResult; | |
241 | } | |
242 | ||
243 | ||
244 | int AliHLTITSVertexerSPDComponent::ReadCDBEntry( const char* cdbEntry, const char* chainId ) | |
245 | { | |
246 | // see header file for class documentation | |
247 | ||
248 | const char* defaultNotify = ""; | |
249 | ||
250 | if ( !cdbEntry ) { | |
251 | return 0;// need to add the HLT/ConfigITS/ITSTracker directory to cdb SG!!! | |
c6af1e27 | 252 | //cdbEntry = "HLT/ConfigITS/ITSTracker"; |
253 | //defaultNotify = " (default)"; | |
254 | //chainId = 0; | |
7f167a74 | 255 | } |
256 | ||
257 | HLTInfo( "configure from entry \"%s\"%s, chain id %s", cdbEntry, defaultNotify, ( chainId != NULL && chainId[0] != 0 ) ? chainId : "<none>" ); | |
258 | AliCDBEntry *pEntry = AliCDBManager::Instance()->Get( cdbEntry );//,GetRunNo()); | |
259 | ||
260 | if ( !pEntry ) { | |
261 | HLTError( "cannot fetch object \"%s\" from CDB", cdbEntry ); | |
262 | return -EINVAL; | |
263 | } | |
264 | ||
265 | TObjString* pString = dynamic_cast<TObjString*>( pEntry->GetObject() ); | |
266 | ||
267 | if ( !pString ) { | |
268 | HLTError( "configuration object \"%s\" has wrong type, required TObjString", cdbEntry ); | |
269 | return -EINVAL; | |
270 | } | |
271 | ||
272 | HLTInfo( "received configuration object string: \"%s\"", pString->GetString().Data() ); | |
273 | ||
274 | return ReadConfigurationString( pString->GetString().Data() ); | |
275 | } | |
276 | ||
277 | ||
278 | int AliHLTITSVertexerSPDComponent::Configure( const char* cdbEntry, const char* chainId, const char *commandLine ) | |
279 | { | |
280 | // Configure the component | |
281 | // There are few levels of configuration, | |
282 | // parameters which are set on one step can be overwritten on the next step | |
283 | ||
284 | //* read hard-coded values | |
285 | ||
286 | SetDefaultConfiguration(); | |
287 | ||
288 | //* read the default CDB entry | |
289 | ||
290 | int iResult1 = ReadCDBEntry( NULL, chainId ); | |
291 | ||
7f167a74 | 292 | //* read the actual CDB entry if required |
293 | ||
fb83175d | 294 | int iResult2 = ( cdbEntry ) ? ReadCDBEntry( cdbEntry, chainId ) : 0; |
295 | ||
7f167a74 | 296 | //* read extra parameters from input (if they are) |
297 | ||
fb83175d | 298 | int iResult3 = 0; |
7f167a74 | 299 | |
300 | if ( commandLine && commandLine[0] != '\0' ) { | |
301 | HLTInfo( "received configuration string from HLT framework: \"%s\"", commandLine ); | |
fb83175d | 302 | iResult3 = ReadConfigurationString( commandLine ); |
7f167a74 | 303 | } |
304 | ||
305 | // Initialise the tracker here | |
306 | ||
fb83175d | 307 | return iResult1 ? iResult1 : ( iResult2 ? iResult2 : iResult3 ); |
7f167a74 | 308 | } |
309 | ||
310 | ||
311 | ||
312 | int AliHLTITSVertexerSPDComponent::DoInit( int argc, const char** argv ) | |
313 | { | |
314 | // Configure the ITS tracker component | |
315 | ||
fb83175d | 316 | SetDefaultConfiguration(); |
75970b8d | 317 | |
7f167a74 | 318 | if(AliGeomManager::GetGeometry()==NULL){ |
319 | AliGeomManager::LoadGeometry(""); | |
320 | } | |
321 | AliGeomManager::ApplyAlignObjsFromCDB("ITS"); | |
322 | ||
323 | TString arguments = ""; | |
324 | for ( int i = 0; i < argc; i++ ) { | |
325 | if ( !arguments.IsNull() ) arguments += " "; | |
326 | arguments += argv[i]; | |
327 | } | |
328 | ||
329 | int ret = Configure( NULL, NULL, arguments.Data() ); | |
330 | ||
fb83175d | 331 | for( int i=0; i<9; i++ ) delete[] fSum[i]; |
332 | delete[] fSumW; | |
333 | delete[] fSumN; | |
334 | ||
335 | fZMin = -fZRange; | |
336 | fNZBins = ( (int) (2*fZRange/fZBinSize ))+1; | |
337 | ||
338 | for( int i=0; i<9; i++ ) fSum[i] = new double [fNZBins]; | |
339 | ||
340 | fSumW = new double [fNZBins]; | |
341 | fSumN = new int [fNZBins]; | |
342 | ||
7f167a74 | 343 | return ret; |
344 | } | |
345 | ||
346 | ||
347 | int AliHLTITSVertexerSPDComponent::DoDeinit() | |
348 | { | |
349 | // see header file for class documentation | |
350 | ||
fb83175d | 351 | for( int i=0; i<9; i++ ){ |
352 | delete[] fSum[i]; | |
353 | fSum[i] = 0; | |
354 | } | |
355 | delete[] fSumW; | |
356 | delete[] fSumN; | |
357 | fSumW = 0; | |
358 | fSumN = 0; | |
359 | ||
360 | SetDefaultConfiguration(); | |
7f167a74 | 361 | |
7f167a74 | 362 | return 0; |
363 | } | |
364 | ||
365 | ||
366 | ||
367 | int AliHLTITSVertexerSPDComponent::Reconfigure( const char* cdbEntry, const char* chainId ) | |
368 | { | |
369 | // Reconfigure the component from OCDB . | |
370 | ||
371 | return Configure( cdbEntry, chainId, NULL ); | |
372 | } | |
373 | ||
374 | ||
375 | int AliHLTITSVertexerSPDComponent::DoEvent | |
376 | ( | |
377 | const AliHLTComponentEventData& evtData, | |
378 | const AliHLTComponentBlockData* blocks, | |
379 | AliHLTComponentTriggerData& /*trigData*/, | |
380 | AliHLTUInt8_t* /*outputPtr*/, | |
381 | AliHLTUInt32_t& size, | |
382 | vector<AliHLTComponentBlockData>& /*outputBlocks*/ ) | |
383 | { | |
384 | //* process event | |
385 | ||
42742c37 | 386 | //AliHLTUInt32_t maxBufferSize = size; |
7f167a74 | 387 | size = 0; // output size |
388 | ||
389 | if (!IsDataEvent()) return 0; | |
390 | ||
391 | if ( evtData.fBlockCnt <= 0 ) { | |
392 | HLTWarning( "no blocks in event" ); | |
393 | return 0; | |
394 | } | |
395 | ||
7f167a74 | 396 | TStopwatch timer; |
397 | ||
398 | // Event reconstruction in ITS | |
399 | ||
400 | int iResult=0; | |
401 | ||
402 | int nBlocks = evtData.fBlockCnt; | |
403 | int nClustersTotal = 0; | |
404 | ||
405 | ||
406 | const int kNPhiBins = 20; | |
407 | const double kDPhi = TMath::TwoPi() / kNPhiBins; | |
408 | double vtxX = fRunVtx[0], vtxY = fRunVtx[1], vtxZ = fRunVtx[2]; | |
409 | ||
7f167a74 | 410 | std::vector<AliHLTITSVertexerSPDComponent::AliHLTITSVZCluster> clusters[2][ kNPhiBins ]; |
411 | ||
412 | for (int ndx=0; ndx<nBlocks && iResult>=0; ndx++) { | |
413 | ||
414 | const AliHLTComponentBlockData* iter = blocks+ndx; | |
415 | ||
416 | // Read ITS SPD clusters | |
417 | ||
418 | if ( iter->fDataType == (kAliHLTDataTypeClusters|kAliHLTDataOriginITSSPD) ){ | |
419 | ||
420 | AliHLTITSClusterData *inPtr=reinterpret_cast<AliHLTITSClusterData*>( iter->fPtr ); | |
421 | int nClusters = inPtr->fSpacePointCnt; | |
422 | nClustersTotal+=nClusters; | |
423 | for( int icl=0; icl<nClusters; icl++ ){ | |
424 | AliHLTITSSpacePointData &d = inPtr->fSpacePoints[icl]; | |
425 | if( d.fLayer>1 ) continue;// SPD only; | |
426 | if( d.fLayer<0 ) continue;// SPD only; | |
427 | Int_t lab[4] = { d.fTracks[0], d.fTracks[1], d.fTracks[2], d.fIndex }; | |
428 | Int_t info[3] = { d.fNy, d.fNz, d.fLayer }; | |
429 | Float_t hit[6] = { d.fY, d.fZ, d.fSigmaY2, d.fSigmaZ2, d.fQ, d.fSigmaYZ }; | |
430 | if( d.fLayer==4 ) hit[5] = -hit[5]; | |
431 | ||
432 | ||
433 | AliITSRecPoint p( lab, hit, info ); | |
434 | ||
435 | if (!p.Misalign()){ | |
436 | HLTWarning("Can not misalign an SPD cluster"); | |
437 | } | |
438 | Float_t xyz[3]; | |
439 | p.GetGlobalXYZ(xyz); | |
440 | ||
441 | // get phi bin | |
442 | double phi = TMath::ATan2( xyz[1]-vtxY, xyz[0]-vtxX ); | |
443 | if( phi<0 ) phi+=TMath::TwoPi(); | |
5c2dca91 | 444 | int iphi = (int ) (phi/kDPhi); |
7f167a74 | 445 | if( iphi<0 ) iphi = 0; |
446 | if( iphi>=kNPhiBins ) iphi = kNPhiBins-1; | |
447 | AliHLTITSVZCluster c; | |
448 | c.fX = xyz[0]; | |
449 | c.fY = xyz[1]; | |
450 | c.fZ = xyz[2]; | |
451 | clusters[d.fLayer][iphi].push_back( c ); | |
452 | } | |
453 | } | |
454 | }// end read input blocks | |
455 | ||
456 | ||
457 | // Reconstruct the vertex | |
458 | ||
459 | TStopwatch timerReco; | |
460 | ||
fb83175d | 461 | double zScale = 1./fZBinSize; |
7f167a74 | 462 | |
fb83175d | 463 | // fit few times decreasing the radius cut |
7f167a74 | 464 | |
fb83175d | 465 | double vtxDR2[5] = { 1.*1., .5*.5, .4*.4, .4*.4, .2*.2}; |
466 | double vtxDZ [5] = { 1., .5, .3, .3, .3}; | |
467 | double maxW = 0; | |
7f167a74 | 468 | int bestBin = -1; |
469 | ||
fb83175d | 470 | for( int iter = 0; iter<3; iter++ ){ |
471 | ||
472 | bool doZBins = (iter<2); | |
473 | int nSearchBins = doZBins ?fNZBins :1; | |
474 | { | |
475 | for( int i=0; i<nSearchBins; i++ ){ | |
476 | fSum[0][i] = 0; | |
477 | fSum[1][i] = 0; | |
478 | fSum[2][i] = 0; | |
479 | fSum[3][i] = 0; | |
480 | fSum[4][i] = 0; | |
481 | fSum[5][i] = 0; | |
482 | fSum[6][i] = 0; | |
483 | fSum[7][i] = 0; | |
484 | fSum[8][i] = 0; | |
485 | fSumW[i] = 0; | |
486 | fSumN[i] = 0; | |
487 | } | |
7f167a74 | 488 | } |
fb83175d | 489 | |
7f167a74 | 490 | for( int iPhi=0; iPhi<kNPhiBins; iPhi++ ){ |
491 | int nCluUp = clusters[1][iPhi].size(); | |
492 | int nCluDn = clusters[0][iPhi].size(); | |
493 | for( int icUp=0; icUp<nCluUp; icUp++ ){ | |
494 | AliHLTITSVZCluster &cu = clusters[1][iPhi][icUp]; | |
495 | double x0 = cu.fX - vtxX; | |
496 | double y0 = cu.fY - vtxY; | |
fb83175d | 497 | double z0 = cu.fZ;// - vtxZ; |
7f167a74 | 498 | double bestR2 = 1.e10; |
42742c37 | 499 | int bestDn=-1, bestBinDn =0; |
fb83175d | 500 | double bestP[3]={0,0,0}; |
7f167a74 | 501 | for( int icDn=0; icDn<nCluDn; icDn++ ){ |
502 | AliHLTITSVZCluster &cd = clusters[0][iPhi][icDn]; | |
503 | double x1 = cd.fX - vtxX; | |
504 | double y1 = cd.fY - vtxY; | |
fb83175d | 505 | double z1 = cd.fZ;// - vtxZ; |
7f167a74 | 506 | double dx = x1 - x0; |
507 | double dy = y1 - y0; | |
508 | double l2 = 1./(dx*dx + dy*dy); | |
509 | double a = x1*y0 - x0*y1; | |
510 | double r2 = a*a*l2; | |
fb83175d | 511 | if( r2 > vtxDR2[iter] ) continue; |
512 | if( r2 > bestR2 ) continue; | |
513 | //double xv = -dy*a*l2; | |
514 | //double yv = dx*a*l2; | |
7f167a74 | 515 | double zv = ( (x1*z0-x0*z1)*dx + (y1*z0-y0*z1)*dy )*l2; |
fb83175d | 516 | int zbin; |
517 | if( doZBins ){ | |
518 | zbin = (int)((zv - fZMin)*zScale); | |
519 | if( zbin<0 || zbin>=fNZBins ) continue; | |
520 | } else { | |
521 | zbin = 0; | |
522 | if( TMath::Abs( zv - vtxZ ) > vtxDZ[ iter ] ) continue; | |
7f167a74 | 523 | } |
fb83175d | 524 | bestR2 = r2; |
525 | bestDn = icDn; | |
526 | bestP[0] = x1; | |
527 | bestP[1] = y1; | |
528 | bestP[2] = z1; | |
529 | bestBinDn = zbin; | |
7f167a74 | 530 | } |
fb83175d | 531 | if( bestDn < 0 ) continue; |
532 | ||
533 | double dx = bestP[0] - x0; | |
534 | double dy = bestP[1] - y0; | |
535 | double dz = bestP[2] - z0; | |
536 | double w = 1./(1.+bestR2); | |
537 | ||
538 | // Equations: | |
539 | // | |
540 | // A_i*x + B_i*y + C_i*z = D_i | |
541 | // | |
542 | // Sum[0] = sum A_i*A_i | |
543 | // Sum[1] = sum B_i*A_i | |
544 | // Sum[2] = sum B_i*B_i | |
545 | // Sum[3] = sum C_i*A_i | |
546 | // Sum[4] = sum C_i*B_i | |
547 | // Sum[5] = sum C_i*C_i | |
548 | // Sum[6] = sum A_i*D_i | |
549 | // Sum[7] = sum B_i*D_i | |
550 | // Sum[8] = sum C_i*D_i | |
551 | ||
552 | double n = w / TMath::Sqrt(dx*dx + dy*dy + dz*dz); | |
553 | dy*=n; | |
554 | dx*=n; | |
555 | dz*=n; | |
556 | double a, b, c, d; | |
557 | a = dy; b = -dx; c = 0; d = dy*x0 - dx*y0; | |
558 | { | |
559 | fSum[0][bestBinDn]+= a*a; | |
560 | fSum[1][bestBinDn]+= b*a; | |
561 | fSum[2][bestBinDn]+= b*b; | |
562 | //fSum[3][bestBinDn]+= c*a; | |
563 | //fSum[4][bestBinDn]+= c*b; | |
564 | //fSum[5][bestBinDn]+= c*c; | |
565 | fSum[6][bestBinDn]+= a*d; | |
566 | fSum[7][bestBinDn]+= b*d; | |
567 | //fSum[8][bestBinDn]+= c*d; | |
7f167a74 | 568 | } |
fb83175d | 569 | a = dz; b = 0; c = -dx; d = dz*x0 - dx*z0; |
570 | { | |
571 | fSum[0][bestBinDn]+= a*a; | |
572 | //fSum[1][bestBinDn]+= b*a; | |
573 | //fSum[2][bestBinDn]+= b*b; | |
574 | fSum[3][bestBinDn]+= c*a; | |
575 | //fSum[4][bestBinDn]+= c*b; | |
576 | fSum[5][bestBinDn]+= c*c; | |
577 | fSum[6][bestBinDn]+= a*d; | |
578 | //fSum[7][bestBinDn]+= b*d; | |
579 | fSum[8][bestBinDn]+= c*d; | |
580 | } | |
581 | ||
582 | a = 0; b = dz; c = -dy; d = dz*y0 - dy*z0; | |
583 | { | |
584 | //fSum[0][bestBinDn]+= a*a; | |
585 | //fSum[1][bestBinDn]+= b*a; | |
586 | fSum[2][bestBinDn]+= b*b; | |
587 | //fSum[3][bestBinDn]+= c*a; | |
588 | fSum[4][bestBinDn]+= c*b; | |
589 | fSum[5][bestBinDn]+= c*c; | |
590 | //fSum[6][bestBinDn]+= a*d; | |
591 | fSum[7][bestBinDn]+= b*d; | |
592 | fSum[8][bestBinDn]+= c*d; | |
593 | } | |
594 | ||
595 | a = dz; b = 0; c = -dx; d = dz*x0 - dx*z0; | |
596 | { | |
597 | fSum[0][bestBinDn]+= a*a; | |
598 | //fSum[1][bestBinDn]+= b*a; | |
599 | //fSum[2][bestBinDn]+= b*b; | |
600 | fSum[3][bestBinDn]+= c*a; | |
601 | //fSum[4][bestBinDn]+= c*b; | |
602 | fSum[5][bestBinDn]+= c*c; | |
603 | fSum[6][bestBinDn]+= a*d; | |
604 | //fSum[7][bestBinDn]+= b*d; | |
605 | fSum[8][bestBinDn]+= c*d; | |
606 | } | |
607 | ||
608 | fSumW[bestBinDn]+=w; | |
609 | fSumN[bestBinDn]+=1; | |
610 | } | |
7f167a74 | 611 | } |
612 | ||
613 | maxW = 0; | |
614 | bestBin = -1; | |
fb83175d | 615 | for( int i=0; i<nSearchBins; i++ ){ |
616 | if( fSumN[i]>maxW ){ | |
7f167a74 | 617 | bestBin = i; |
fb83175d | 618 | maxW = fSumN[i]; |
7f167a74 | 619 | } |
620 | } | |
d72d9d99 | 621 | if( bestBin<0 || fSumN[bestBin] < 3 ){ |
7f167a74 | 622 | bestBin = -1; |
623 | break; | |
624 | } | |
fb83175d | 625 | |
626 | // calculate the vertex position in the best bin | |
627 | Double_t w[6] = { fSum[0][bestBin], | |
628 | fSum[1][bestBin], fSum[2][bestBin], | |
629 | fSum[3][bestBin], fSum[4][bestBin], fSum[5][bestBin] }; | |
630 | Double_t wI[6]; | |
631 | { | |
632 | wI[0] = w[2]*w[5] - w[4]*w[4]; | |
633 | wI[1] = w[3]*w[4] - w[1]*w[5]; | |
634 | wI[2] = w[0]*w[5] - w[3]*w[3]; | |
635 | wI[3] = w[1]*w[4] - w[2]*w[3]; | |
636 | wI[4] = w[1]*w[3] - w[0]*w[4]; | |
637 | wI[5] = w[0]*w[2] - w[1]*w[1]; | |
638 | ||
639 | Double_t s = ( w[0]*wI[0] + w[1]*wI[1] + w[3]*wI[3] ); | |
36210f72 | 640 | |
fb83175d | 641 | if( s<1.e-10 ){ |
642 | bestBin = -1; | |
643 | break; | |
644 | } | |
645 | s = 1./s; | |
646 | wI[0]*=s; | |
647 | wI[1]*=s; | |
648 | wI[2]*=s; | |
649 | wI[3]*=s; | |
650 | wI[4]*=s; | |
651 | wI[5]*=s; | |
652 | } | |
653 | ||
654 | vtxX += wI[0]*fSum[6][bestBin] + wI[1]*fSum[7][bestBin] + wI[3]*fSum[8][bestBin]; | |
655 | vtxY += wI[1]*fSum[6][bestBin] + wI[2]*fSum[7][bestBin] + wI[4]*fSum[8][bestBin]; | |
656 | vtxZ = wI[3]*fSum[6][bestBin] + wI[4]*fSum[7][bestBin] + wI[5]*fSum[8][bestBin]; | |
657 | //cout<<"SG: "<<iter<<": "<<vtxX<<" "<<vtxY<<" "<<vtxZ<<endl; | |
7f167a74 | 658 | } |
659 | ||
7f167a74 | 660 | timerReco.Stop(); |
661 | ||
662 | // Fill output | |
663 | ||
664 | if( bestBin>=0 ){ | |
665 | double pos[3] = {vtxX, vtxY, vtxZ}; | |
666 | double s = 400.E-4; | |
667 | double cov[6] = {s*s,0,s*s,0,0,s*s}; | |
fb83175d | 668 | AliESDVertex v(pos, cov, 0, fSumN[bestBin]); |
7f167a74 | 669 | PushBack( (TObject*) &v, kAliHLTDataTypeESDVertex|kAliHLTDataOriginITS,0 ); |
670 | ||
671 | //cout<<"ITSVertexerSPD: vtx found "<<vtxX<<" "<<vtxY<<" "<<vtxZ<<endl; | |
7f167a74 | 672 | } |
673 | ||
7f167a74 | 674 | timer.Stop(); |
675 | fFullTime += timer.RealTime(); | |
676 | fRecoTime += timerReco.RealTime(); | |
677 | fNEvents++; | |
678 | ||
679 | // Set log level to "Warning" for on-line system monitoring | |
680 | int hz = ( int ) ( fFullTime > 1.e-10 ? fNEvents / fFullTime : 100000 ); | |
681 | int hz1 = ( int ) ( fRecoTime > 1.e-10 ? fNEvents / fRecoTime : 100000 ); | |
682 | HLTInfo( "ITS Z Vertexer: input %d clusters; time: full %d / reco %d Hz", | |
683 | nClustersTotal, hz, hz1 ); | |
684 | ||
685 | return iResult; | |
686 | } |