2 // Original: AliHLTGlobalMerger.cxx,v 1.13 2005/06/14 10:55:21 cvetan
4 /**************************************************************************
5 * This file is property of and copyright by the ALICE HLT Project *
6 * ALICE Experiment at CERN, All rights reserved. *
8 * Primary Authors: Uli Frankenfeld, maintained by *
9 * Matthias Richter <Matthias.Richter@ift.uib.no> *
10 * for The ALICE HLT Project. *
12 * Permission to use, copy, modify and distribute this software and its *
13 * documentation strictly for non-commercial purposes is hereby granted *
14 * without fee, provided that the above copyright notice appears in all *
15 * copies and that both the copyright notice and this permission notice *
16 * appear in the supporting documentation. The authors make no claims *
17 * about the suitability of this software for any purpose. It is *
18 * provided "as is" without express or implied warranty. *
19 **************************************************************************/
21 /** @file AliHLTTPCGlobalMerger.cxx
22 @author Uli Frankenfeld, maintained by Matthias Richter
24 @brief The HLT TPC slice merger
27 #include "AliHLTTPCLogging.h"
28 #include "AliHLTTPCGlobalMerger.h"
29 #include "AliHLTTPCTrack.h"
30 #include "AliHLTTPCTransform.h"
31 #include "AliHLTTPCTrackArray.h"
37 ClassImp(AliHLTTPCGlobalMerger)
39 AliHLTTPCGlobalMerger::AliHLTTPCGlobalMerger()
41 //Default constructor. Use Setup to specify and setup the necessary parameters and arrays.
43 SetParameter(0,0,0,0,0);
50 AliHLTTPCGlobalMerger::~AliHLTTPCGlobalMerger()
55 void AliHLTTPCGlobalMerger::Setup(Int_t first,Int_t last)
57 //Used to setup the arrays and everything
59 fNSlices = last-first+1;
62 InitMerger(last-first+1);
65 void AliHLTTPCGlobalMerger::InitSlice(Int_t slice)
68 // Select Sector The following FillTracks call will
72 fCurrentTracks = fSlice - fFirst;
75 Double_t AliHLTTPCGlobalMerger::CheckTracks(AliHLTTPCTrack *innertrack,AliHLTTPCTrack *outertrack,Int_t slice)
77 //Compare the tracks by propagating the outermost track to the last and first point plane
78 //of the innermost track. This plane is defined by the padrow plane where these points
81 if(innertrack->GetCharge()!=outertrack->GetCharge()) return -1;
83 Float_t angle = 0;//perpendicular to the padrowplane (in local system)
84 AliHLTTPCTransform::Local2GlobalAngle(&angle,slice);
85 Double_t dx[2],dy[2],dz[2];
87 AliHLTTPCTrack *tracks[2];
88 tracks[0] = innertrack;
89 tracks[1] = outertrack;
90 SortGlobalTracks(tracks,2);
91 innertrack = tracks[0];
92 outertrack = tracks[1];
96 point[0]=innertrack->GetLastPointX();
97 point[1]=innertrack->GetLastPointY();
98 point[2]=innertrack->GetLastPointZ();
99 AliHLTTPCTransform::Global2LocHLT(point,slice);
101 outertrack->CalculateReferencePoint(angle,point[0]);//local x = global distance to padrowplane
102 if(!outertrack->IsPoint()) return diff;
103 dx[0] = fabs(outertrack->GetPointX()-innertrack->GetLastPointX());
104 dy[0] = fabs(outertrack->GetPointY()-innertrack->GetLastPointY());
105 dz[0] = fabs(outertrack->GetPointZ()-innertrack->GetLastPointZ());
107 point[0]=innertrack->GetFirstPointX();
108 point[1]=innertrack->GetFirstPointY();
109 point[2]=innertrack->GetFirstPointZ();
110 AliHLTTPCTransform::Global2LocHLT(point,slice);
112 outertrack->CalculateReferencePoint(angle,point[0]);//local x = global distance to padrowplane
113 if(!outertrack->IsPoint()) return diff;
114 dx[1] = fabs(outertrack->GetPointX()-innertrack->GetFirstPointX());
115 dy[1] = fabs(outertrack->GetPointY()-innertrack->GetFirstPointY());
116 dz[1] = fabs(outertrack->GetPointZ()-innertrack->GetFirstPointZ());
118 diff=0;//This was a tough bug to find....
119 for(Int_t i=0; i<2; i++)
120 diff += sqrt(dx[i]*dx[i] + dy[i]*dy[i] + dz[i]*dz[i]);
124 void AliHLTTPCGlobalMerger::SlowMerge(Char_t *path)
126 //Tuning of parameters. This matches _all_ tracks between two neighbouring
127 //slices, and merges the ones which are closest in space. The difference
128 //is written to a ntuppel, which can be used as a input for the SetParameters
129 //when using normal Merge function.
132 void* ntuple=GetNtuple();
133 AliHLTTPCTrack *track[2];
134 AliHLTTPCTrackArray *tout = GetOutTracks();
137 LOG(AliHLTTPCLog::kWarning,"AliHLTTPCGlobalMerger::SlowMerge","Slice Number")
138 <<"Need more than one Slice!"<<ENDLOG;
142 for(Int_t i=0; i<fNSlices; i++)
144 //if(fNSlices!=18 && i+1 == fNSlices) continue;
145 Int_t slice = fFirst + i;
146 AliHLTTPCTrackArray *ttt0=GetInTracks(i);
148 //if(slice2==fNSlices) slice2 =0;
150 //Make sure slices are on the same side of the TPC
151 if(slice2 == 18) slice2=0;
152 else if(slice2 == 36) slice2=18;
153 AliHLTTPCTrackArray *ttt1=GetInTracks(slice2);
154 //10 degrees -> the border of the slices in local coordinates
155 Float_t angle = AliHLTTPCTransform::Pi()/18;
156 AliHLTTPCTransform::Local2GlobalAngle(&angle,slice);
158 //In the two following cases, the angle is 2*pi, so set it back to 0 in order for
159 //the calculation of crossing points to be correct.
160 if(slice==17 || slice==35)
165 for(Int_t s0=0;s0<ttt0->GetNTracks();s0++)
167 AliHLTTPCTrack *track0=ttt0->GetCheckedTrack(s0);
168 if(!track0) continue;
169 track0->CalculateHelix();
170 track0->CalculateEdgePoint(angle);
171 // if(track0->IsPoint()) AddTrack(tout,track0);
173 for(Int_t s1=0;s1<ttt1->GetNTracks();s1++)
175 AliHLTTPCTrack *track1=ttt1->GetCheckedTrack(s1);
176 if(!track1) continue;
177 track1->CalculateHelix();
178 track1->CalculateEdgePoint(angle);
179 // if(track1->IsPoint()) AddTrack(tout,track1);
181 Bool_t merge = kTRUE;
184 Int_t min0=-1,min1=-1;
186 Int_t n0=ttt0->GetNTracks(),n1=ttt1->GetNTracks();
187 for(Int_t s0=0;s0<n0;s0++)
189 AliHLTTPCTrack *track0=ttt0->GetCheckedTrack(s0);
190 if(!track0) continue;
191 if(!track0->IsPoint()) continue;
192 for(Int_t s1=0;s1<n1;s1++)
194 AliHLTTPCTrack *track1=ttt1->GetCheckedTrack(s1);
195 if(!track1) continue;
196 if(!track1->IsPoint()) continue;
198 //Double_t diff = TrackDiff(track0,track1,angle);
199 Double_t diff = CheckTracks(track0,track1,slice);
200 //PrintDiff(track0,track1);
201 if(diff>=0&&diff<min)
211 AliHLTTPCTrack *track0=ttt0->GetTrack(min0);
212 AliHLTTPCTrack *track1=ttt1->GetTrack(min1);
215 SortGlobalTracks(track,2);
216 track1->CalculateEdgePoint((angle+AliHLTTPCTransform::Pi()/9));
217 if(track1->IsPoint())//Check if the track will cross the boundary of yet another slice.
218 MultiMerge(ttt1,track,2);
220 MultiMerge(tout,track,2);
221 track0->CalculateReferencePoint(angle);
222 track1->CalculateReferencePoint(angle);
223 //PrintDiff(track0,track1);
224 FillNtuple(ntuple,track0,track1);
233 LOG(AliHLTTPCLog::kInformational,"AliHLTTPCGlobalMerger::SlowMerge","Result")
234 <<AliHLTTPCLog::kDec<<"Merged Tracks: "<<tout->GetNTracks()<<" at:"
238 sprintf(fname,"%s/merge_parameters.root",path);
239 WriteNtuple(fname,ntuple);
242 void AliHLTTPCGlobalMerger::Merge()
244 //Normal merging procedure. Matches tracks which are within limits
245 //set by SetParameters. Parameters can be tuned by SlowMerge.
247 AliHLTTPCTrack *track[2];
248 AliHLTTPCTrackArray *tout = GetOutTracks();
251 LOG(AliHLTTPCLog::kWarning,"AliHLTTPCGlobalMerger::Merge","Slice Number")
252 <<"Need more than one Slice!"<<ENDLOG;
255 for(Int_t i=0; i<fNSlices; i++)
257 //if(fNSlices!=18 && i+1 == fNSlices) continue;
258 Int_t slice = fFirst + i;
259 AliHLTTPCTrackArray *ttt0=GetInTracks(i);
261 //if(slice2==fNSlices) slice2 =0;
263 //Make sure slices are on the same side of the TPC
264 if(slice2 == 18) slice2=0;
265 else if(slice2 == 36) slice2=18;
266 AliHLTTPCTrackArray *ttt1=GetInTracks(slice2);
267 //10 degrees -> the border of the slices in local coordinates
268 Float_t angle = AliHLTTPCTransform::Pi()/18;
269 AliHLTTPCTransform::Local2GlobalAngle(&angle,slice);
271 //In the two following cases, the angle is 2*pi, so set it back to 0 in order for
272 //the calculation of crossing points to be correct.
273 if(slice==17 || slice==35)
278 Bool_t *ismatched0 = new Bool_t[ttt0->GetNTracks()];
279 Bool_t *ismatched1 = new Bool_t[ttt1->GetNTracks()];
281 for(Int_t s0=0;s0<ttt0->GetNTracks();s0++)
283 ismatched0[s0]=kFALSE;
284 AliHLTTPCTrack *track0=ttt0->GetCheckedTrack(s0);
285 if(!track0) continue;
286 //track0->CalculateHelix(); //This it done in TrackArray
287 track0->CalculateEdgePoint(angle);
288 if(track0->IsPoint())
291 track0->CalculateReferencePoint(angle);
294 for(Int_t s1=0;s1<ttt1->GetNTracks();s1++)
296 ismatched1[s1]=kFALSE;
297 AliHLTTPCTrack *track1=ttt1->GetCheckedTrack(s1);
298 if(!track1) continue;
299 //track1->CalculateHelix(); //This is done in TrackArray
300 track1->CalculateEdgePoint(angle);
301 if(track1->IsPoint())
304 track1->CalculateReferencePoint(angle);
307 for(Int_t s0=0;s0<ttt0->GetNTracks();s0++)
309 if(ismatched0[s0]) continue;
310 AliHLTTPCTrack *track0=ttt0->GetCheckedTrack(s0);
311 if(!track0) continue;
312 if(!track0->IsPoint()) continue;
313 for(Int_t s1=0;s1<ttt1->GetNTracks();s1++)
315 if(ismatched1[s1]) continue;
316 AliHLTTPCTrack *track1=ttt1->GetCheckedTrack(s1);
317 if(!track1) continue;
318 if(!track1->IsPoint()) continue;
319 if(IsRTrack(track0,track1))
323 SortGlobalTracks(track,2);
324 Double_t r0 = pow(track[0]->GetLastPointX(),2)+
325 pow(track[0]->GetLastPointY(),2);
326 Double_t r1 = pow(track[1]->GetFirstPointX(),2)+
327 pow(track[1]->GetFirstPointY(),2);
330 MultiMerge(tout,track,2);
331 ismatched0[s0]=kTRUE;
332 ismatched1[s1]=kTRUE;
337 The track is merged, so we will _not_ look for more matches.
338 Because there could easily be more matches, if a track is being
339 split within the sector....
345 LOG(AliHLTTPCLog::kInformational,"AliHLTTPCGlobalMerger::Merge","Result")
346 <<AliHLTTPCLog::kDec<<"slice0: "<<n0<<" slice1: "<<n1
347 <<" Merged Tracks: "<<tout->GetNTracks()<<ENDLOG;
348 delete [] ismatched0;
349 delete [] ismatched1;