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73042f01 | 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 | ||
803d1ab0 | 16 | /* $Id$ */ |
0938c7d3 | 17 | |
73042f01 | 18 | //----------------------------------------------------------------- |
19 | // Implementation of the TPC track class | |
7c27857f | 20 | // This class is used by the AliTPCtracker class |
21 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch | |
73042f01 | 22 | //----------------------------------------------------------------- |
23 | ||
19364939 | 24 | #include <Riostream.h> |
b19a0509 | 25 | |
73042f01 | 26 | #include "AliTPCtrack.h" |
7c27857f | 27 | #include "AliCluster.h" |
6c94f330 | 28 | #include "AliTracker.h" |
83d73500 | 29 | #include "AliESDtrack.h" |
58e536c5 | 30 | #include "AliESDVertex.h" |
d08b7e45 | 31 | #include "TTreeStream.h" |
eba5bca1 | 32 | #include "AliTPCRecoParam.h" |
33 | #include "AliTPCReconstructor.h" | |
73042f01 | 34 | ClassImp(AliTPCtrack) |
b9de75e1 | 35 | |
e3f7105e | 36 | //_________________________________________________________________________ |
e13cc304 | 37 | AliTPCtrack::AliTPCtrack(): |
38 | AliKalmanTrack(), | |
e13cc304 | 39 | fdEdx(0), |
e13cc304 | 40 | fSdEdx(1e10), |
41 | fNFoundable(0), | |
42 | fBConstrain(kFALSE), | |
43 | fLastPoint(-1), | |
44 | fFirstPoint(-1), | |
45 | fRemoval(0), | |
46 | fTrackType(0), | |
47 | fLab2(-1), | |
48 | fNShared(0), | |
49 | fReference() | |
e3f7105e | 50 | { |
2fc0c115 | 51 | //------------------------------------------------- |
52 | // default constructor | |
53 | //------------------------------------------------- | |
e13cc304 | 54 | for (Int_t i=0; i<kMaxRow;i++) fIndex[i]=-2; |
55 | for (Int_t i=0; i<4;i++) fPoints[i]=0.; | |
56 | for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.; | |
c84a5e9e | 57 | for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0; |
e13cc304 | 58 | for (Int_t i=0; i<3;i++) fV0Indexes[i]=0; |
e3f7105e | 59 | } |
60 | ||
73042f01 | 61 | //_________________________________________________________________________ |
51ad6848 | 62 | |
63 | ||
64 | ||
6c94f330 | 65 | AliTPCtrack::AliTPCtrack(Double_t x, Double_t alpha, const Double_t p[5], |
66 | const Double_t cov[15], Int_t index) : | |
e13cc304 | 67 | AliKalmanTrack(), |
e13cc304 | 68 | fdEdx(0), |
e13cc304 | 69 | fSdEdx(1e10), |
70 | fNFoundable(0), | |
71 | fBConstrain(kFALSE), | |
72 | fLastPoint(0), | |
73 | fFirstPoint(0), | |
74 | fRemoval(0), | |
75 | fTrackType(0), | |
76 | fLab2(0), | |
77 | fNShared(0), | |
78 | fReference() | |
79 | { | |
73042f01 | 80 | //----------------------------------------------------------------- |
81 | // This is the main track constructor. | |
82 | //----------------------------------------------------------------- | |
beceeaec | 83 | Double_t cnv=1./(AliTracker::GetBz()*kB2C); |
6c94f330 | 84 | |
85 | Double_t pp[5]={ | |
86 | p[0], | |
87 | p[1], | |
88 | x*p[4] - p[2], | |
89 | p[3], | |
90 | p[4]*cnv | |
91 | }; | |
92 | ||
93 | Double_t c22 = x*x*cov[14] - 2*x*cov[12] + cov[5]; | |
94 | Double_t c32 = x*cov[13] - cov[8]; | |
95 | Double_t c20 = x*cov[10] - cov[3], | |
96 | c21 = x*cov[11] - cov[4], c42 = x*cov[14] - cov[12]; | |
97 | ||
98 | Double_t cc[15]={ | |
99 | cov[0 ], | |
100 | cov[1 ], cov[2 ], | |
101 | c20, c21, c22, | |
102 | cov[6 ], cov[7 ], c32, cov[9 ], | |
103 | cov[10]*cnv, cov[11]*cnv, c42*cnv, cov[13]*cnv, cov[14]*cnv*cnv | |
104 | }; | |
105 | ||
86fc30dc | 106 | Double_t mostProbablePt=AliExternalTrackParam::GetMostProbablePt(); |
107 | Double_t p0=TMath::Sign(1/mostProbablePt,pp[4]); | |
beceeaec | 108 | Double_t w0=cc[14]/(cc[14] + p0*p0), w1=p0*p0/(cc[14] + p0*p0); |
109 | pp[4] = w0*p0 + w1*pp[4]; | |
110 | cc[10]*=w1; cc[11]*=w1; cc[12]*=w1; cc[13]*=w1; cc[14]*=w1; | |
111 | ||
6c94f330 | 112 | Set(x,alpha,pp,cc); |
c84a5e9e | 113 | |
be9c5115 | 114 | SetNumberOfClusters(1); |
e13cc304 | 115 | |
116 | fIndex[0]=index; | |
9fe5b2ff | 117 | for (Int_t i=1; i<kMaxRow;i++) fIndex[i]=-2; |
118 | for (Int_t i=0; i<4;i++) fPoints[i]=0.; | |
119 | for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.; | |
51ad6848 | 120 | for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0; |
81e97e0d | 121 | for (Int_t i=0; i<3;i++) fV0Indexes[i]=0; |
b9de75e1 | 122 | } |
123 | ||
83d73500 | 124 | //_____________________________________________________________________________ |
d08b7e45 | 125 | AliTPCtrack::AliTPCtrack(const AliESDtrack& t, TTreeSRedirector *pcstream) : |
e13cc304 | 126 | AliKalmanTrack(), |
6c94f330 | 127 | fdEdx(t.GetTPCsignal()), |
e13cc304 | 128 | fSdEdx(1e10), |
129 | fNFoundable(0), | |
130 | fBConstrain(kFALSE), | |
131 | fLastPoint(0), | |
132 | fFirstPoint(0), | |
133 | fRemoval(0), | |
134 | fTrackType(0), | |
135 | fLab2(0), | |
136 | fNShared(0), | |
137 | fReference() | |
138 | { | |
83d73500 | 139 | //----------------------------------------------------------------- |
140 | // Conversion AliESDtrack -> AliTPCtrack. | |
141 | //----------------------------------------------------------------- | |
d08b7e45 | 142 | const Double_t kmaxC[4]={10,10,0.1,0.1}; // cuts on the rms /fP0,fP1,fP2,fP3 |
83d73500 | 143 | SetNumberOfClusters(t.GetTPCclusters(fIndex)); |
144 | SetLabel(t.GetLabel()); | |
145 | SetMass(t.GetMass()); | |
9fe5b2ff | 146 | for (Int_t i=0; i<4;i++) fPoints[i]=0.; |
147 | for (Int_t i=0; i<12;i++) fKinkPoint[i]=0.; | |
148 | for (Int_t i=0; i<3;i++) fKinkIndexes[i]=0; | |
149 | for (Int_t i=0; i<3;i++) fV0Indexes[i]=0; | |
d08b7e45 | 150 | // |
151 | // choose parameters to start | |
152 | // | |
eba5bca1 | 153 | const AliTPCRecoParam * recoParam = AliTPCReconstructor::GetRecoParam(); |
d08b7e45 | 154 | Int_t reject=0; |
155 | AliExternalTrackParam param(t); | |
156 | const AliExternalTrackParam *tpcout=(t.GetFriendTrack())? ((AliESDfriendTrack*)(t.GetFriendTrack()))->GetTPCOut():0; | |
157 | const AliExternalTrackParam *tpcin = t.GetInnerParam(); | |
158 | const AliExternalTrackParam *tpc=(tpcout)?tpcout:tpcin; | |
159 | if (!tpc) tpc=¶m; | |
eba5bca1 | 160 | Bool_t isOK=recoParam->GetUseOuterDetectors(); |
d08b7e45 | 161 | if (param.GetCovariance()[0]>kmaxC[0]*kmaxC[0]) isOK=kFALSE; |
162 | if (param.GetCovariance()[2]>kmaxC[1]*kmaxC[1]) isOK=kFALSE; | |
163 | if (param.GetCovariance()[5]>kmaxC[2]*kmaxC[2]) isOK=kFALSE; | |
164 | if (param.GetCovariance()[9]>kmaxC[3]*kmaxC[3]) isOK=kFALSE; | |
eba5bca1 | 165 | if (!isOK ){ |
d08b7e45 | 166 | param=*tpc; |
167 | isOK=kTRUE; | |
168 | reject=1; | |
169 | } | |
170 | param.Rotate(tpc->GetAlpha()); | |
171 | isOK=AliTracker::PropagateTrackToBxByBz(¶m,tpc->GetX(),t.GetMass(),2.,kFALSE); | |
172 | if (param.GetCovariance()[0]>kmaxC[0]*kmaxC[0]) isOK=kFALSE; | |
173 | if (param.GetCovariance()[2]>kmaxC[1]*kmaxC[1]) isOK=kFALSE; | |
174 | if (param.GetCovariance()[5]>kmaxC[2]*kmaxC[2]) isOK=kFALSE; | |
175 | if (param.GetCovariance()[9]>kmaxC[3]*kmaxC[3]) isOK=kFALSE; | |
176 | if (!isOK){ | |
177 | param=*tpc; | |
178 | isOK=kTRUE; | |
179 | reject=2; | |
180 | } | |
181 | if (reject>0){ | |
182 | param.ResetCovariance(4.); // reset covariance if start from backup param | |
183 | } | |
184 | // | |
185 | // | |
186 | if (pcstream){ | |
187 | AliExternalTrackParam dummy; | |
188 | AliExternalTrackParam *ptpc=(AliExternalTrackParam *)tpc; | |
189 | if (!ptpc) ptpc=&dummy; | |
190 | AliESDtrack *esd= (AliESDtrack *)&t; | |
191 | (*pcstream)<<"trackP"<< | |
192 | "reject="<<reject<< // flag - rejection of current esd track parameters | |
193 | "esd.="<<esd<< // original esd track | |
194 | "tr.="<<¶m<< // starting track parameters | |
195 | "out.="<<ptpc<< // backup tpc parameters | |
196 | "\n"; | |
197 | } | |
198 | ||
199 | Set(param.GetX(),param.GetAlpha(),param.GetParameter(),param.GetCovariance()); | |
83d73500 | 200 | |
0798b21e | 201 | if ((t.GetStatus()&AliESDtrack::kTIME) == 0) return; |
83d73500 | 202 | StartTimeIntegral(); |
203 | Double_t times[10]; t.GetIntegratedTimes(times); SetIntegratedTimes(times); | |
204 | SetIntegratedLength(t.GetIntegratedLength()); | |
205 | } | |
206 | ||
73042f01 | 207 | //_____________________________________________________________________________ |
e13cc304 | 208 | AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : |
209 | AliKalmanTrack(t), | |
e13cc304 | 210 | fdEdx(t.fdEdx), |
e13cc304 | 211 | fSdEdx(t.fSdEdx), |
212 | fNFoundable(t.fNFoundable), | |
213 | fBConstrain(t.fBConstrain), | |
214 | fLastPoint(t.fLastPoint), | |
215 | fFirstPoint(t.fFirstPoint), | |
216 | fRemoval(t.fRemoval), | |
217 | fTrackType(t.fTrackType), | |
218 | fLab2(t.fLab2), | |
219 | fNShared(t.fNShared), | |
220 | fReference(t.fReference) | |
221 | ||
222 | { | |
73042f01 | 223 | //----------------------------------------------------------------- |
224 | // This is a track copy constructor. | |
225 | //----------------------------------------------------------------- | |
6c94f330 | 226 | Set(t.GetX(),t.GetAlpha(),t.GetParameter(),t.GetCovariance()); |
227 | ||
51584047 | 228 | for (Int_t i=0; i<kMaxRow; i++) fIndex[i]=t.fIndex[i]; |
9fe5b2ff | 229 | for (Int_t i=0; i<4;i++) fPoints[i]=t.fPoints[i]; |
230 | for (Int_t i=0; i<12;i++) fKinkPoint[i]=t.fKinkPoint[i]; | |
51ad6848 | 231 | for (Int_t i=0; i<3;i++) fKinkIndexes[i]=t.fKinkIndexes[i]; |
81e97e0d | 232 | for (Int_t i=0; i<3;i++) fV0Indexes[i]=t.fV0Indexes[i]; |
be9c5115 | 233 | } |
234 | ||
316c6cd9 | 235 | AliTPCtrack& AliTPCtrack::operator=(const AliTPCtrack& o){ |
236 | if(this!=&o){ | |
237 | AliKalmanTrack::operator=(o); | |
238 | fdEdx = o.fdEdx; | |
239 | for(Int_t i = 0;i<kMaxRow;++i)fIndex[i] = o.fIndex[i]; | |
240 | for(Int_t i = 0;i<4;++i)fPoints[i] = o.fPoints[i]; | |
241 | fSdEdx = o.fSdEdx; | |
242 | fNFoundable = o.fNFoundable; | |
243 | fBConstrain = o.fBConstrain; | |
244 | fLastPoint = o.fLastPoint; | |
245 | fFirstPoint = o.fFirstPoint; | |
246 | fTrackType = o.fTrackType; | |
247 | fLab2 = o.fLab2; | |
248 | fNShared = o.fNShared; | |
249 | fReference = o.fReference; | |
250 | for(Int_t i = 0;i<12;++i) fKinkPoint[i] = o.fKinkPoint[i]; | |
251 | ||
252 | for(Int_t i = 0;i<3;++i){ | |
253 | fKinkIndexes[i] = o.fKinkIndexes[i]; | |
254 | fV0Indexes[i] = o.fV0Indexes[i]; | |
255 | } | |
256 | } | |
257 | return *this; | |
258 | ||
259 | } | |
260 | ||
261 | ||
be9c5115 | 262 | //_____________________________________________________________________________ |
263 | Int_t AliTPCtrack::Compare(const TObject *o) const { | |
264 | //----------------------------------------------------------------- | |
265 | // This function compares tracks according to the their curvature | |
266 | //----------------------------------------------------------------- | |
267 | AliTPCtrack *t=(AliTPCtrack*)o; | |
6c23ffed | 268 | //Double_t co=t->OneOverPt(); |
269 | //Double_t c = OneOverPt(); | |
024a7fe9 | 270 | Double_t co=t->GetSigmaY2()*t->GetSigmaZ2(); |
271 | Double_t c =GetSigmaY2()*GetSigmaZ2(); | |
be9c5115 | 272 | if (c>co) return 1; |
273 | else if (c<co) return -1; | |
274 | return 0; | |
275 | } | |
276 | ||
6c94f330 | 277 | Double_t AliTPCtrack::GetPredictedChi2(const AliCluster *c) const { |
be9c5115 | 278 | //----------------------------------------------------------------- |
279 | // This function calculates a predicted chi2 increment. | |
280 | //----------------------------------------------------------------- | |
6c94f330 | 281 | Double_t p[2]={c->GetY(), c->GetZ()}; |
282 | Double_t cov[3]={c->GetSigmaY2(), 0., c->GetSigmaZ2()}; | |
283 | return AliExternalTrackParam::GetPredictedChi2(p,cov); | |
c630aafd | 284 | } |
285 | ||
73042f01 | 286 | //_____________________________________________________________________________ |
6c94f330 | 287 | Bool_t AliTPCtrack::PropagateTo(Double_t xk,Double_t rho,Double_t x0) { |
73042f01 | 288 | //----------------------------------------------------------------- |
6c94f330 | 289 | // This function propagates a track to a reference plane x=xk. |
290 | // rho - density of the crossed matrial (g/cm^3) | |
291 | // x0 - radiation length of the crossed material (g/cm^2) | |
73042f01 | 292 | //----------------------------------------------------------------- |
a326cd74 | 293 | // |
294 | Double_t bz=GetBz(); | |
295 | Double_t zat=0; | |
296 | if (!GetZAt(xk, bz,zat)) return kFALSE; | |
297 | if (TMath::Abs(zat)>250.){ | |
298 | // Don't propagate track outside of the fiducial volume - material budget not proper one | |
299 | // | |
300 | //AliWarning("Propagate outside of fiducial volume"); | |
301 | return kFALSE; | |
302 | } | |
303 | ||
6c94f330 | 304 | Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ(); |
273ccc8a | 305 | //if (!AliExternalTrackParam::PropagateTo(xk,bz)) return kFALSE; |
306 | Double_t b[3]; GetBxByBz(b); | |
307 | if (!AliExternalTrackParam::PropagateToBxByBz(xk,b)) return kFALSE; | |
73042f01 | 308 | |
6c94f330 | 309 | Double_t d = TMath::Sqrt((GetX()-oldX)*(GetX()-oldX) + |
310 | (GetY()-oldY)*(GetY()-oldY) + | |
311 | (GetZ()-oldZ)*(GetZ()-oldZ)); | |
312 | if (IsStartedTimeIntegral() && GetX()>oldX) AddTimeStep(d); | |
313 | ||
314 | if (oldX < xk) d = -d; | |
0f30c08a | 315 | if (!AliExternalTrackParam::CorrectForMeanMaterial(d*rho/x0,d*rho,GetMass(), |
316 | kFALSE,AliExternalTrackParam::BetheBlochGas)) return kFALSE; | |
e3f7105e | 317 | |
6c94f330 | 318 | return kTRUE; |
73042f01 | 319 | } |
320 | ||
321 | //_____________________________________________________________________________ | |
6c94f330 | 322 | Bool_t |
0f30c08a | 323 | AliTPCtrack::PropagateToVertex(const AliESDVertex *v,Double_t rho,Double_t x0) |
73042f01 | 324 | { |
325 | //----------------------------------------------------------------- | |
0f30c08a | 326 | // This function propagates tracks to the vertex |
327 | // rho - density of the crossed matrial (g/cm3) | |
328 | // x0 - radiation length of the crossed material (g/cm2) | |
73042f01 | 329 | //----------------------------------------------------------------- |
0f30c08a | 330 | Double_t oldX=GetX(), oldY=GetY(), oldZ=GetZ(); |
331 | ||
273ccc8a | 332 | //Double_t bz=GetBz(); |
333 | //if (!PropagateToDCA(v,bz,kVeryBig)) return kFALSE; | |
334 | Double_t b[3]; GetBxByBz(b); | |
335 | if (!PropagateToDCABxByBz(v,b,kVeryBig)) return kFALSE; | |
0f30c08a | 336 | |
337 | Double_t d = TMath::Sqrt((GetX()-oldX)*(GetX()-oldX) + | |
338 | (GetY()-oldY)*(GetY()-oldY) + | |
339 | (GetZ()-oldZ)*(GetZ()-oldZ)); | |
340 | ||
341 | if (oldX < GetX()) d = -d; | |
342 | if (!AliExternalTrackParam::CorrectForMeanMaterial(d*rho/x0,d*rho,GetMass(), | |
343 | kFALSE,AliExternalTrackParam::BetheBlochGas)) return kFALSE; | |
344 | ||
345 | return kTRUE; | |
73042f01 | 346 | } |
347 | ||
348 | //_____________________________________________________________________________ | |
6c94f330 | 349 | Bool_t AliTPCtrack::Update(const AliCluster *c, Double_t chisq, Int_t index) { |
73042f01 | 350 | //----------------------------------------------------------------- |
351 | // This function associates a cluster with this track. | |
352 | //----------------------------------------------------------------- | |
6c94f330 | 353 | Double_t p[2]={c->GetY(), c->GetZ()}; |
354 | Double_t cov[3]={c->GetSigmaY2(), 0., c->GetSigmaZ2()}; | |
73042f01 | 355 | |
6c94f330 | 356 | if (!AliExternalTrackParam::Update(p,cov)) return kFALSE; |
73042f01 | 357 | |
70e20dcf | 358 | AliTracker::FillResiduals(this,p,cov,c->GetVolumeId()); |
359 | ||
be9c5115 | 360 | Int_t n=GetNumberOfClusters(); |
361 | fIndex[n]=index; | |
362 | SetNumberOfClusters(n+1); | |
363 | SetChi2(GetChi2()+chisq); | |
364 | ||
6c94f330 | 365 | return kTRUE; |
73042f01 | 366 | } |
367 | ||
51584047 | 368 | //////////////////////////////////////////////////////////////////////// |
369 | // MI ADDITION | |
370 | ||
371 | Float_t AliTPCtrack::Density(Int_t row0, Int_t row1) | |
372 | { | |
373 | // | |
374 | // calculate cluster density | |
375 | Int_t good = 0; | |
376 | Int_t found = 0; | |
377 | //if (row0<fFirstPoint) row0 = fFirstPoint; | |
378 | if (row1>fLastPoint) row1 = fLastPoint; | |
379 | ||
380 | ||
381 | for (Int_t i=row0;i<=row1;i++){ | |
382 | // Int_t index = fClusterIndex[i]; | |
383 | Int_t index = fIndex[i]; | |
384 | if (index!=-1) good++; | |
385 | if (index>0) found++; | |
386 | } | |
387 | Float_t density=0; | |
388 | if (good>0) density = Float_t(found)/Float_t(good); | |
389 | return density; | |
390 | } | |
391 | ||
392 | ||
393 | Float_t AliTPCtrack::Density2(Int_t row0, Int_t row1) | |
394 | { | |
395 | // | |
396 | // calculate cluster density | |
397 | Int_t good = 0; | |
398 | Int_t found = 0; | |
399 | // | |
400 | for (Int_t i=row0;i<=row1;i++){ | |
401 | Int_t index = fIndex[i]; | |
402 | if (index!=-1) good++; | |
403 | if (index>0) found++; | |
404 | } | |
405 | Float_t density=0; | |
406 | if (good>0) density = Float_t(found)/Float_t(good); | |
407 | return density; | |
408 | } | |
409 | ||
51ad6848 | 410 | void AliTPCtrack::UpdatePoints() |
411 | { | |
412 | //-------------------------------------------------- | |
413 | //calculates first ,amx dens and last points | |
414 | //-------------------------------------------------- | |
415 | Float_t density[160]; | |
416 | for (Int_t i=0;i<160;i++) density[i]=-1.; | |
417 | fPoints[0]= 160; | |
418 | fPoints[1] = -1; | |
419 | // | |
420 | Int_t ngood=0; | |
421 | Int_t undeff=0; | |
422 | Int_t nall =0; | |
423 | Int_t range=20; | |
424 | for (Int_t i=0;i<160;i++){ | |
425 | Int_t last = i-range; | |
426 | if (nall<range) nall++; | |
427 | if (last>=0){ | |
428 | if (fIndex[last]>0&& (fIndex[last]&0x8000)==0) ngood--; | |
429 | if (fIndex[last]==-1) undeff--; | |
430 | } | |
431 | if (fIndex[i]>0&& (fIndex[i]&0x8000)==0) ngood++; | |
432 | if (fIndex[i]==-1) undeff++; | |
433 | if (nall==range &&undeff<range/2) density[i-range/2] = Float_t(ngood)/Float_t(nall-undeff); | |
434 | } | |
435 | Float_t maxdens=0; | |
436 | Int_t indexmax =0; | |
437 | for (Int_t i=0;i<160;i++){ | |
438 | if (density[i]<0) continue; | |
439 | if (density[i]>maxdens){ | |
440 | maxdens=density[i]; | |
441 | indexmax=i; | |
442 | } | |
443 | } | |
444 | // | |
445 | //max dens point | |
446 | fPoints[3] = maxdens; | |
447 | fPoints[1] = indexmax; | |
448 | // | |
449 | // last point | |
450 | for (Int_t i=indexmax;i<160;i++){ | |
451 | if (density[i]<0) continue; | |
452 | if (density[i]<maxdens/2.) { | |
453 | break; | |
454 | } | |
455 | fPoints[2]=i; | |
456 | } | |
457 | // | |
458 | // first point | |
459 | for (Int_t i=indexmax;i>0;i--){ | |
460 | if (density[i]<0) continue; | |
461 | if (density[i]<maxdens/2.) { | |
462 | break; | |
463 | } | |
464 | fPoints[0]=i; | |
465 | } | |
466 | // | |
467 | } | |
5773defd | 468 |