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d15a28e7 | 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 | ||
b2a60966 | 16 | /* $Id$ */ |
17 | ||
d15a28e7 | 18 | //_________________________________________________________________________ |
b2a60966 | 19 | // Track segment in PHOS |
20 | // Can be : 1 EmcRecPoint | |
21 | // 1 EmcRecPoint + 1 PPSD | |
22 | // 1 EmcRecPoint + 1 PPSD + 1 PPSD | |
23 | // | |
24 | //*-- Author: Dmitri Peressounko (RRC KI & SUBATECH) | |
d15a28e7 | 25 | |
26 | // --- ROOT system --- | |
27 | ||
28 | #include "TVector3.h" | |
9f616d61 | 29 | #include "TPad.h" |
d15a28e7 | 30 | |
31 | // --- Standard library --- | |
32 | ||
de9ec31b | 33 | #include <iostream.h> |
d15a28e7 | 34 | |
35 | // --- AliRoot header files --- | |
36 | ||
37 | #include "AliPHOSTrackSegment.h" | |
38 | #include "AliPHOSv0.h" | |
39 | ||
40 | ClassImp(AliPHOSTrackSegment) | |
41 | ||
42 | //____________________________________________________________________________ | |
43 | AliPHOSTrackSegment::AliPHOSTrackSegment( AliPHOSEmcRecPoint * emc , AliPHOSPpsdRecPoint * ppsdRP1, | |
44 | AliPHOSPpsdRecPoint * ppsdRP2 ) | |
b2a60966 | 45 | { |
46 | // ctor | |
47 | ||
d15a28e7 | 48 | if( emc ) |
49 | fEmcRecPoint = emc ; | |
50 | ||
51 | if( ppsdRP1 ) | |
52 | fPpsdUp = ppsdRP1 ; | |
53 | ||
54 | if( ppsdRP2 ) | |
55 | fPpsdLow = ppsdRP2 ; | |
56 | ||
d15a28e7 | 57 | } |
58 | ||
6ad0bfa0 | 59 | //____________________________________________________________________________ |
60 | AliPHOSTrackSegment::AliPHOSTrackSegment( const AliPHOSTrackSegment & ts) | |
61 | { | |
b2a60966 | 62 | // Copy ctor |
63 | ||
c198e326 | 64 | ( (AliPHOSTrackSegment &)ts ).Copy(*this) ; |
6ad0bfa0 | 65 | } |
66 | ||
d15a28e7 | 67 | |
6ad0bfa0 | 68 | //____________________________________________________________________________ |
69 | void AliPHOSTrackSegment::Copy(TObject & obj) | |
70 | { | |
b2a60966 | 71 | // Copy of a track segment into another track segment |
72 | ||
6ad0bfa0 | 73 | TObject::Copy(obj) ; |
b2a60966 | 74 | ( (AliPHOSTrackSegment &)obj ).fEmcRecPointId = fEmcRecPointId ; |
75 | ( (AliPHOSTrackSegment &)obj ).fPpsdLowId = fPpsdLowId ; | |
76 | ( (AliPHOSTrackSegment &)obj ).fPpsdUpId = fPpsdUpId ; | |
6ad0bfa0 | 77 | } |
9f616d61 | 78 | //____________________________________________________________________________ |
79 | Int_t AliPHOSTrackSegment::DistancetoPrimitive(Int_t px, Int_t py) | |
80 | { | |
b2a60966 | 81 | // Compute distance from point px,py to a AliPHOSTrackSegment considered as a Tmarker |
82 | // Compute the closest distance of approach from point px,py to this marker. | |
83 | // The distance is computed in pixels units. | |
84 | ||
6ad0bfa0 | 85 | Int_t div = 1 ; |
86 | TVector3 pos(0.,0.,0.) ; | |
b2a60966 | 87 | |
6ad0bfa0 | 88 | fEmcRecPoint->GetLocalPosition( pos) ; |
89 | Float_t x = pos.X() ; | |
90 | Float_t y = pos.Z() ; | |
91 | if ( fPpsdLow ) { | |
92 | fPpsdLow->GetLocalPosition( pos ) ; | |
93 | x += pos.X() ; | |
94 | y += pos.Z() ; | |
95 | div++ ; | |
96 | } | |
97 | if ( fPpsdUp ) { | |
98 | fPpsdUp->GetLocalPosition( pos ) ; | |
99 | x += pos.X() ; | |
100 | y += pos.Z() ; | |
101 | div++ ; | |
102 | } | |
103 | x /= div ; | |
104 | y /= div ; | |
105 | ||
9f616d61 | 106 | const Int_t kMaxDiff = 10; |
107 | Int_t pxm = gPad->XtoAbsPixel(x); | |
108 | Int_t pym = gPad->YtoAbsPixel(y); | |
109 | Int_t dist = (px-pxm)*(px-pxm) + (py-pym)*(py-pym); | |
110 | ||
111 | if (dist > kMaxDiff) return 9999; | |
112 | return dist; | |
113 | } | |
114 | ||
115 | //___________________________________________________________________________ | |
116 | void AliPHOSTrackSegment::Draw(Option_t *option) | |
117 | { | |
6ad0bfa0 | 118 | // Draw this AliPHOSTrackSegment with its current attribute |
b2a60966 | 119 | |
6ad0bfa0 | 120 | AppendPad(option); |
9f616d61 | 121 | } |
122 | ||
123 | //______________________________________________________________________________ | |
124 | void AliPHOSTrackSegment::ExecuteEvent(Int_t event, Int_t px, Int_t py) | |
125 | { | |
6ad0bfa0 | 126 | // Execute action corresponding to one event |
127 | // This member function is called when a AliPHOSTrackSegment is clicked with the locator | |
128 | // | |
129 | // If Left button is clicked on AliPHOSRecPoint, the digits are switched on | |
130 | // and switched off when the mouse button is released. | |
b2a60966 | 131 | |
132 | static TPaveText* textTS = 0 ; | |
133 | ||
134 | if (!gPad->IsEditable()) | |
135 | return; | |
136 | ||
137 | switch (event) { | |
9f616d61 | 138 | |
b2a60966 | 139 | case kButton1Down:{ |
140 | ||
141 | if (!textTS) { | |
142 | ||
143 | TVector3 pos(0.,0.,0.) ; | |
144 | fEmcRecPoint->GetLocalPosition(pos) ; | |
145 | textTS = new TPaveText(pos.X()-10,pos.Z()+10,pos.X()+5,pos.Z()+15,"") ; | |
146 | Text_t line1[40] ; | |
147 | sprintf(line1,"See RecParticle for ID") ; | |
148 | textTS ->AddText(line1) ; | |
149 | textTS ->Draw(""); | |
150 | gPad->Update() ; | |
151 | } | |
152 | } | |
153 | ||
154 | break; | |
9f616d61 | 155 | |
b2a60966 | 156 | case kButton1Up: |
157 | if (textTS) { | |
158 | delete textTS ; | |
159 | textTS = 0 ; | |
160 | } | |
161 | break; | |
162 | } | |
9f616d61 | 163 | } |
164 | ||
d15a28e7 | 165 | //____________________________________________________________________________ |
166 | Float_t AliPHOSTrackSegment::GetDistanceInPHOSPlane() | |
167 | { | |
b2a60966 | 168 | // Calculates the distance between the EMC RecPoint and PPSD RecPoint |
169 | ||
d15a28e7 | 170 | TVector3 vecEmc ; |
171 | fEmcRecPoint->GetLocalPosition(vecEmc) ; | |
b2a60966 | 172 | |
d15a28e7 | 173 | TVector3 vecPpsd ; |
174 | if( fPpsdLow->GetMultiplicity() ) | |
175 | fPpsdLow->GetLocalPosition(vecPpsd) ; | |
176 | else { | |
177 | vecPpsd.SetX(10000.) ; | |
178 | } | |
179 | vecEmc -= vecPpsd ; | |
180 | ||
92862013 | 181 | Float_t r = vecEmc.Mag();; |
d15a28e7 | 182 | |
92862013 | 183 | return r ; |
d15a28e7 | 184 | } |
185 | ||
186 | //____________________________________________________________________________ | |
6ad0bfa0 | 187 | TVector3 AliPHOSTrackSegment::GetMomentumDirection() |
b2a60966 | 188 | { |
189 | // Calculates the momentum direction: | |
190 | // 1. if only a EMC RecPoint, direction is given by IP and this RecPoint | |
191 | // 2. if a EMC RecPoint and one PPSD RecPoint, direction is given by the line through the 2 recpoints | |
192 | // 3. if a EMC RecPoint and two PPSD RecPoints, dirrection is given by the average line through | |
193 | // the 2 pairs of recpoints | |
194 | // However because of the poor position resolution of PPSD the direction is always taken as if we were | |
195 | // in case 1. | |
196 | ||
197 | TVector3 dir(0,0,0) ; | |
6ad0bfa0 | 198 | TMatrix mdummy ; |
d15a28e7 | 199 | |
6ad0bfa0 | 200 | TVector3 posEmc ; |
201 | fEmcRecPoint->GetGlobalPosition(posEmc, mdummy) ; | |
202 | ||
b2a60966 | 203 | // Correction for the depth of the shower starting point (TDR p 127) |
98569bc2 | 204 | |
205 | Float_t energy = fEmcRecPoint->GetEnergy() ; | |
206 | Float_t para = 0.925 ; | |
207 | Float_t parb = 6.52 ; | |
208 | ||
209 | TVector3 localpos ; | |
210 | fEmcRecPoint->GetLocalPosition(localpos) ; | |
211 | ||
212 | AliPHOSGeometry * geom = AliPHOSGeometry::GetInstance() ; | |
213 | Float_t radius = geom->GetIPtoOuterCoverDistance() + geom->GetOuterBoxSize(1) ; | |
214 | Float_t incidencephi = TMath::ATan(localpos.X() / radius) ; | |
215 | Float_t incidencetheta = TMath::ATan(localpos.Z() / radius) ; | |
216 | ||
b2a60966 | 217 | Float_t depthx = ( para * TMath::Log(energy) + parb ) * TMath::Sin(incidencephi) ; |
218 | Float_t depthz = ( para * TMath::Log(energy) + parb ) * TMath::Sin(incidencetheta) ; | |
98569bc2 | 219 | |
b2a60966 | 220 | localpos.SetX(localpos.X() - depthx ) ; |
221 | localpos.SetZ(localpos.Z() - depthz ) ; | |
d15a28e7 | 222 | |
b2a60966 | 223 | TVector3 emcglobalpos ; |
224 | TMatrix dummy ; | |
6ad0bfa0 | 225 | |
b2a60966 | 226 | fEmcRecPoint->GetGlobalPosition(emcglobalpos, dummy) ; |
227 | ||
228 | emcglobalpos.SetX( emcglobalpos.X() - depthx ) ; | |
229 | emcglobalpos.SetZ( emcglobalpos.Z() - depthz ) ; | |
6ad0bfa0 | 230 | |
b2a60966 | 231 | // The following commeneted code becomes valid once the PPSD provides |
232 | // a reasonable position resolution, at least as good as EMC ! | |
233 | ||
234 | // TVector3 ppsdlglobalpos ; | |
235 | // TVector3 ppsduglobalpos ; | |
236 | ||
237 | // if( fPpsdLow ){ // certainly a photon that has concerted | |
238 | ||
239 | // fPpsdLow->GetGlobalPosition(ppsdlglobalpos, mdummy) ; | |
240 | // dir = emcglobalpos - ppsdlglobalpos ; | |
241 | ||
242 | // if( fPpsdUp ){ // nop looks like a charged | |
243 | ||
244 | // fPpsdUp->GetGlobalPosition(ppsduglobalpos, mdummy) ; | |
245 | // dir = ( dir + emcglobalpos - ppsduglobalpos ) * 0.5 ; | |
246 | // } | |
247 | // } | |
248 | ||
249 | // else { // looks like a neutral | |
250 | ||
251 | dir = emcglobalpos ; | |
252 | // } | |
253 | ||
254 | dir.SetZ( -dir.Z() ) ; // why ? | |
6ad0bfa0 | 255 | dir.SetMag(1.) ; |
b2a60966 | 256 | |
6ad0bfa0 | 257 | return dir ; |
d15a28e7 | 258 | } |
259 | ||
b2a60966 | 260 | //____________________________________________________________________________ |
261 | Int_t * AliPHOSTrackSegment::GetPrimariesEmc(Int_t & number) | |
262 | { | |
263 | // Retrieves the primary particle(s) at the origin of the EMC RecPoint | |
264 | ||
265 | Int_t * rv = 0 ; | |
266 | number = 0 ; | |
267 | if ( fEmcRecPoint ) | |
268 | rv = fEmcRecPoint->GetPrimaries(number) ; | |
269 | ||
270 | return rv ; | |
271 | } | |
272 | ||
273 | //____________________________________________________________________________ | |
274 | Int_t * AliPHOSTrackSegment::GetPrimariesPpsdLow(Int_t & number) | |
275 | { | |
276 | // Retrieves the primary particle(s) at the origin of the lower PPSD RecPoint | |
277 | ||
278 | Int_t * rv = 0 ; | |
279 | number = 0 ; | |
280 | if ( fPpsdLow ) | |
281 | rv = fPpsdLow->GetPrimaries(number) ; | |
282 | ||
283 | return rv ; | |
284 | } | |
285 | ||
286 | //____________________________________________________________________________ | |
287 | Int_t * AliPHOSTrackSegment::GetPrimariesPpsdUp(Int_t & number) | |
288 | { | |
289 | // Retrieves the primary particle(s) at the origin of the upper PPSD RecPoint | |
290 | ||
291 | Int_t * rv = 0 ; | |
292 | number = 0 ; | |
293 | if ( fPpsdUp ) | |
294 | rv = fPpsdUp->GetPrimaries(number) ; | |
295 | ||
296 | return rv ; | |
297 | } | |
d15a28e7 | 298 | |
299 | //____________________________________________________________________________ | |
300 | void AliPHOSTrackSegment::GetPosition( TVector3 & pos ) | |
301 | { | |
b2a60966 | 302 | // Returns position of the EMC RecPoint |
303 | ||
92862013 | 304 | TMatrix dummy ; |
305 | fEmcRecPoint->GetGlobalPosition(pos, dummy) ; | |
d15a28e7 | 306 | } |
307 | ||
b2a60966 | 308 | |
9f616d61 | 309 | //______________________________________________________________________________ |
310 | void AliPHOSTrackSegment::Paint(Option_t *) | |
311 | { | |
b2a60966 | 312 | // Paint this ALiPHOSTrackSegment as a TMarker with its current attributes |
6ad0bfa0 | 313 | |
b2a60966 | 314 | TVector3 posemc(999., 999., 999.) ; |
315 | TVector3 posppsdl(999., 999., 999.) ; | |
316 | TVector3 posppsdu(999., 999., 999.) ; | |
6ad0bfa0 | 317 | |
b2a60966 | 318 | fEmcRecPoint->GetLocalPosition(posemc) ; |
319 | if (fPpsdLow !=0 ) | |
320 | fPpsdLow->GetLocalPosition(posppsdl) ; | |
321 | if (fPpsdUp !=0 ) | |
322 | fPpsdUp->GetLocalPosition(posppsdu) ; | |
323 | ||
324 | Coord_t xemc = posemc.X() ; | |
325 | Coord_t yemc = posemc.Z() ; | |
326 | ||
327 | Coord_t yppsdl = posppsdl.Z() ; | |
328 | Coord_t xppsdl = posppsdl.X() ; | |
329 | ||
330 | Coord_t yppsdu = posppsdu.Z() ; | |
331 | Coord_t xppsdu = posppsdu.X() ; | |
332 | ||
333 | Color_t markercolor = 1 ; | |
334 | Size_t markersize = 1.5 ; | |
335 | Style_t markerstyle = 20 ; | |
336 | ||
337 | if (!gPad->IsBatch()) { | |
338 | gVirtualX->SetMarkerColor(markercolor) ; | |
339 | gVirtualX->SetMarkerSize (markersize) ; | |
340 | gVirtualX->SetMarkerStyle(markerstyle) ; | |
341 | } | |
342 | gPad->SetAttMarkerPS(markercolor,markerstyle,markersize) ; | |
343 | gPad->PaintPolyMarker(1, &xemc, &yemc, "") ; | |
344 | ||
345 | if (xppsdl != 999. && yppsdl != 999. ) { | |
346 | ||
347 | markercolor = 2 ; | |
348 | markersize = 1.25 ; | |
349 | markerstyle = 21 ; | |
350 | ||
351 | if (!gPad->IsBatch()) { | |
352 | gVirtualX->SetMarkerColor(markercolor) ; | |
353 | gVirtualX->SetMarkerSize (markersize) ; | |
354 | gVirtualX->SetMarkerStyle(markerstyle) ; | |
355 | } | |
356 | gPad->SetAttMarkerPS(markercolor,markerstyle,markersize) ; | |
357 | gPad->PaintPolyMarker(1, &xppsdl, &yppsdl, "") ; | |
358 | } | |
359 | ||
360 | if (xppsdu != 999. && yppsdu != 999. ) { | |
361 | ||
362 | markercolor = 3 ; | |
363 | markersize = 1. ; | |
364 | markerstyle = 22 ; | |
365 | ||
366 | if (!gPad->IsBatch()) { | |
367 | gVirtualX->SetMarkerColor(markercolor) ; | |
368 | gVirtualX->SetMarkerSize (markersize) ; | |
369 | gVirtualX->SetMarkerStyle(markerstyle) ; | |
6ad0bfa0 | 370 | } |
b2a60966 | 371 | gPad->SetAttMarkerPS(markercolor,markerstyle,markersize) ; |
372 | gPad->PaintPolyMarker(1, &xppsdu, &yppsdu, "") ; | |
373 | } | |
9f616d61 | 374 | } |
375 | ||
d15a28e7 | 376 | //____________________________________________________________________________ |
377 | void AliPHOSTrackSegment::Print() | |
378 | { | |
b2a60966 | 379 | // Print all information on this track Segment |
380 | ||
d15a28e7 | 381 | cout << "--------AliPHOSTrackSegment-------- "<<endl ; |
382 | cout << "EMC Reconstructed Point: " << fEmcRecPoint << endl; | |
383 | ||
384 | TVector3 pos ; | |
92862013 | 385 | TMatrix dummy ; |
d15a28e7 | 386 | |
92862013 | 387 | fEmcRecPoint->GetGlobalPosition( pos, dummy ) ; |
d15a28e7 | 388 | |
389 | cout << " position " << pos.X() << " " << pos.Y() << " " << pos.Z() << " Energy " << fEmcRecPoint->GetTotalEnergy() << endl ; | |
390 | cout << "PPSD Low Reconstructed Point: " << endl; | |
391 | ||
392 | if(fPpsdLow){ | |
92862013 | 393 | fPpsdLow->GetGlobalPosition( pos , dummy ) ; |
d15a28e7 | 394 | cout << " position " << pos.X() << " " << pos.Y() << " " << pos.Z() << endl ; |
395 | } | |
396 | ||
397 | cout << "PPSD Up Reconstructed Point: " << endl; | |
398 | ||
399 | if(fPpsdUp ){ | |
92862013 | 400 | fPpsdUp->GetGlobalPosition( pos, dummy ) ; |
d15a28e7 | 401 | cout << " position " << pos.X() << " " << pos.Y() << " " << pos.Z() << endl ; |
402 | } | |
403 | ||
404 | } | |
405 |