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