1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // Transition Radiation Detector //
21 // This class contains the basic functions for the Transition Radiation //
24 ///////////////////////////////////////////////////////////////////////////////
27 #include <Riostream.h>
30 #include <TGeometry.h>
31 #include <TLorentzVector.h>
35 #include <TParticle.h>
38 #include <TVirtualMC.h>
42 #include "AliLoader.h"
46 #include "AliTRDdigit.h"
47 #include "AliTRDdigitizer.h"
48 #include "AliTRDdigitsManager.h"
49 #include "AliTRDgeometryFull.h"
50 #include "AliTRDgeometryHole.h"
51 #include "AliTRDhit.h"
52 #include "AliTRDpoints.h"
53 #include "AliTRDrawData.h"
54 #include "AliTrackReference.h"
59 //_____________________________________________________________________________
63 // Default constructor
81 //_____________________________________________________________________________
82 AliTRD::AliTRD(const char *name, const char *title)
83 : AliDetector(name,title)
86 // Standard constructor for the TRD
89 // Check that FRAME is there otherwise we have no place where to
91 AliModule* frame = gAlice->GetModule("FRAME");
93 Error("Ctor","TRD needs FRAME to be present\n");
97 // Define the TRD geometry
98 if ((frame->IsVersion() == 0) ||
99 (frame->IsVersion() == 1)) {
100 fGeometry = new AliTRDgeometryFull();
103 Error("Ctor","Could not find valid FRAME version\n");
108 TDirectory* saveDir = gDirectory;
109 gAlice->GetRunLoader()->CdGAFile();
110 fGeometry->Write("TRDgeometry");
113 // Allocate the hit array
114 fHits = new TClonesArray("AliTRDhit" ,405);
115 gAlice->GetMCApp()->AddHitList(fHits);
117 // Allocate the digits array
129 SetMarkerColor(kWhite);
133 //_____________________________________________________________________________
134 AliTRD::AliTRD(const AliTRD &trd):AliDetector(trd)
140 ((AliTRD &) trd).Copy(*this);
144 //_____________________________________________________________________________
164 //_____________________________________________________________________________
165 void AliTRD::Hits2Digits()
170 AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class");
171 digitizer.SetDebug(GetDebug());
174 digitizer.InitDetector();
176 if (!fLoader->TreeH()) fLoader->LoadHits("read");
177 fLoader->LoadDigits("recreate");
178 AliRunLoader* runLoader = fLoader->GetRunLoader();
180 for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) {
181 digitizer.Open(runLoader->GetFileName().Data(), iEvent);
182 digitizer.MakeDigits();
183 digitizer.WriteDigits();
186 fLoader->UnloadHits();
187 fLoader->UnloadDigits();
191 //_____________________________________________________________________________
192 void AliTRD::Hits2SDigits()
195 // Create summable digits
198 AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class");
199 // For the summable digits
200 digitizer.SetSDigits(kTRUE);
201 digitizer.SetDebug(GetDebug());
204 digitizer.InitDetector();
206 if (!fLoader->TreeH()) fLoader->LoadHits("read");
207 fLoader->LoadSDigits("recreate");
208 AliRunLoader* runLoader = fLoader->GetRunLoader();
210 for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) {
211 digitizer.Open(runLoader->GetFileName().Data(), iEvent);
212 digitizer.MakeDigits();
213 digitizer.WriteDigits();
216 fLoader->UnloadHits();
217 fLoader->UnloadSDigits();
221 //_____________________________________________________________________________
222 AliDigitizer* AliTRD::CreateDigitizer(AliRunDigitizer* manager) const
225 // Creates a new digitizer object
228 return new AliTRDdigitizer(manager);
232 //_____________________________________________________________________________
233 void AliTRD::SDigits2Digits()
236 // Create final digits from summable digits
239 // Create the TRD digitizer
240 AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class");
241 digitizer.SetDebug(GetDebug());
244 digitizer.SetEvent(gAlice->GetEvNumber());
247 digitizer.InitDetector();
249 // Read the s-digits via digits manager
250 AliTRDdigitsManager sdigitsManager;
252 sdigitsManager.SetDebug(GetDebug());
253 sdigitsManager.SetSDigits(kTRUE);
254 sdigitsManager.CreateArrays();
256 if (!fLoader->TreeS())
257 if (fLoader->LoadSDigits("read"))
259 Error("SDigits2Digits","Error while reading SDigits for event %d",gAlice->GetEvNumber());
262 if (!fLoader->TreeS()) return;
264 sdigitsManager.ReadDigits(fLoader->TreeS());
266 // Add the s-digits to the input list
267 digitizer.AddSDigitsManager(&sdigitsManager);
269 // Convert the s-digits to normal digits
270 digitizer.SDigits2Digits();
273 if (!fLoader->TreeD()) fLoader->MakeTree("D");
274 if (digitizer.MakeBranch(fLoader->TreeD())){
275 digitizer.WriteDigits();
280 //_____________________________________________________________________________
281 void AliTRD::Digits2Raw()
284 // convert digits of the current event to raw data
287 fLoader->LoadDigits();
288 TTree* digits = fLoader->TreeD();
290 Error("Digits2Raw", "no digits tree");
294 AliTRDrawData rawWriter;
295 // rawWriter.SetDebug(2);
296 if (!rawWriter.Digits2Raw(digits)) {
297 Error("AliTRD::Digits2Raw","The raw writer could not load the digits tree");
300 fLoader->UnloadDigits();
304 //_____________________________________________________________________________
305 void AliTRD::AddHit(Int_t track, Int_t det, Float_t *hits, Int_t q
309 // Add a hit for the TRD
312 TClonesArray &lhits = *fHits;
313 AliTRDhit *hit = new(lhits[fNhits++]) AliTRDhit(fIshunt,track,det,hits,q);
318 hit->SetAmplification();
326 //_____________________________________________________________________________
327 void AliTRD::BuildGeometry()
330 // Create the ROOT TNode geometry for the TRD
337 Float_t zmax1, zmax2;
341 const Int_t kColorTRD = 46;
343 // Find the top node alice
344 top = gAlice->GetGeometry()->GetNode("alice");
346 if (fDisplayType == 0) {
348 pgon = new TPGON("S_TRD","TRD","void",0,360,AliTRDgeometry::Nsect(),4);
349 rmin = AliTRDgeometry::Rmin();
350 rmax = AliTRDgeometry::Rmax();
351 pgon->DefineSection(0,-AliTRDgeometry::Zmax1(),rmax,rmax);
352 pgon->DefineSection(1,-AliTRDgeometry::Zmax2(),rmin,rmax);
353 pgon->DefineSection(2, AliTRDgeometry::Zmax2(),rmin,rmax);
354 pgon->DefineSection(3, AliTRDgeometry::Zmax1(),rmax,rmax);
356 node = new TNode("TRD","TRD","S_TRD",0,0,0,"");
357 node->SetLineColor(kColorTRD);
361 else if (fDisplayType == 1) {
365 Float_t slope = (AliTRDgeometry::Zmax1() - AliTRDgeometry::Zmax2())
366 / (AliTRDgeometry::Rmax() - AliTRDgeometry::Rmin());
368 rmin = AliTRDgeometry::Rmin() + AliTRDgeometry::CraHght();
369 rmax = rmin + AliTRDgeometry::CdrHght();
371 Float_t thickness = rmin - AliTRDgeometry::Rmin();
372 zmax2 = AliTRDgeometry::Zmax2() + slope * thickness;
373 zmax1 = zmax2 + slope * AliTRDgeometry::DrThick();
375 for (iPlan = 0; iPlan < AliTRDgeometry::Nplan(); iPlan++) {
377 sprintf(name,"S_TR1%d",iPlan);
378 pgon = new TPGON(name,"TRD","void",0,360,AliTRDgeometry::Nsect(),4);
379 pgon->DefineSection(0,-zmax1,rmax,rmax);
380 pgon->DefineSection(1,-zmax2,rmin,rmax);
381 pgon->DefineSection(2, zmax2,rmin,rmax);
382 pgon->DefineSection(3, zmax1,rmax,rmax);
384 node = new TNode("TRD","TRD",name,0,0,0,"");
385 node->SetLineColor(kColorTRD);
388 Float_t height = AliTRDgeometry::Cheight() + AliTRDgeometry::Cspace();
389 rmin = rmin + height;
390 rmax = rmax + height;
391 zmax1 = zmax1 + slope * height;
392 zmax2 = zmax2 + slope * height;
396 thickness += AliTRDgeometry::DrThick();
397 rmin = AliTRDgeometry::Rmin() + thickness;
398 rmax = rmin + AliTRDgeometry::AmThick();
399 zmax2 = AliTRDgeometry::Zmax2() + slope * thickness;
400 zmax1 = zmax2 + slope * AliTRDgeometry::AmThick();
402 for (iPlan = 0; iPlan < AliTRDgeometry::Nplan(); iPlan++) {
404 sprintf(name,"S_TR2%d",iPlan);
405 pgon = new TPGON(name,"TRD","void",0,360,AliTRDgeometry::Nsect(),4);
406 pgon->DefineSection(0,-zmax1,rmax,rmax);
407 pgon->DefineSection(1,-zmax2,rmin,rmax);
408 pgon->DefineSection(2, zmax2,rmin,rmax);
409 pgon->DefineSection(3, zmax1,rmax,rmax);
411 node = new TNode("TRD","TRD",name,0,0,0,"");
412 node->SetLineColor(kColorTRD);
415 Float_t height = AliTRDgeometry::Cheight() + AliTRDgeometry::Cspace();
416 rmin = rmin + height;
417 rmax = rmax + height;
418 zmax1 = zmax1 + slope * height;
419 zmax2 = zmax2 + slope * height;
427 //_____________________________________________________________________________
428 void AliTRD::Copy(TObject &trd)
434 ((AliTRD &) trd).fGasMix = fGasMix;
435 ((AliTRD &) trd).fGeometry = fGeometry;
436 ((AliTRD &) trd).fGasDensity = fGasDensity;
437 ((AliTRD &) trd).fFoilDensity = fFoilDensity;
438 ((AliTRD &) trd).fDrawTR = fDrawTR;
439 ((AliTRD &) trd).fDisplayType = fDisplayType;
441 //AliDetector::Copy(trd);
445 //_____________________________________________________________________________
446 void AliTRD::CreateGeometry()
449 // Creates the volumes for the TRD chambers
452 // Check that FRAME is there otherwise we have no place where to put the TRD
453 AliModule* frame = gAlice->GetModule("FRAME");
455 printf(" The TRD needs the FRAME to be defined first\n");
459 fGeometry->CreateGeometry(fIdtmed->GetArray() - 1299);
463 //_____________________________________________________________________________
464 void AliTRD::CreateMaterials()
467 // Create the materials for the TRD
471 Int_t isxfld = gAlice->Field()->Integ();
472 Float_t sxmgmx = gAlice->Field()->Max();
474 // For polyethilene (CH2)
475 Float_t ape[2] = { 12., 1. };
476 Float_t zpe[2] = { 6., 1. };
477 Float_t wpe[2] = { 1., 2. };
480 // For mylar (C5H4O2)
481 Float_t amy[3] = { 12., 1., 16. };
482 Float_t zmy[3] = { 6., 1., 8. };
483 Float_t wmy[3] = { 5., 4., 2. };
487 Float_t aco[2] = { 12., 16. };
488 Float_t zco[2] = { 6., 8. };
489 Float_t wco[2] = { 1., 2. };
490 Float_t dco = 0.001977;
493 Float_t awa[2] = { 1., 16. };
494 Float_t zwa[2] = { 1., 8. };
495 Float_t wwa[2] = { 2., 1. };
498 // For isobutane (C4H10)
499 Float_t ais[2] = { 12., 1. };
500 Float_t zis[2] = { 6., 1. };
501 Float_t wis[2] = { 4., 10. };
502 Float_t dis = 0.00267;
504 // For plexiglas (C5H8O2)
505 Float_t apg[3] = { 12.011 , 1.0 , 15.9994 };
506 Float_t zpg[3] = { 6.0 , 1.0 , 8.0 };
507 Float_t wpg[3] = { 5.0 , 8.0 , 2.0 };
510 // For Xe/CO2-gas-mixture
511 // Xe-content of the Xe/CO2-mixture (85% / 15%)
513 // Xe-content of the Xe/Isobutane-mixture (97% / 3%)
515 Float_t dxe = .005858;
517 // General tracking parameter
518 Float_t tmaxfd = -10.;
519 Float_t stemax = -1e10;
520 Float_t deemax = -0.1;
521 Float_t epsil = 1e-4;
522 Float_t stmin = -0.001;
524 Float_t absl, radl, d, buf[1];
525 Float_t agm[2], zgm[2], wgm[2];
529 //////////////////////////////////////////////////////////////////////////
531 //////////////////////////////////////////////////////////////////////////
533 AliMaterial( 1, "Al" , 26.98, 13.0, 2.7 , 8.9 , 37.2);
534 AliMaterial( 2, "Air" , 14.61, 7.3, 0.001205, 30420.0 , 67500.0);
535 AliMaterial( 4, "Xe" , 131.29, 54.0, dxe , 1447.59, 0.0);
536 AliMaterial( 5, "Cu" , 63.54, 29.0, 8.96 , 1.43, 14.8);
537 AliMaterial( 6, "C" , 12.01, 6.0, 2.265 , 18.8 , 74.4);
538 AliMaterial(12, "G10" , 20.00, 10.0, 1.7 , 19.4 , 999.0);
539 AliMaterial(15, "Sn" , 118.71, 50.0, 7.31 , 1.21, 14.8);
540 AliMaterial(16, "Si" , 28.09, 14.0, 2.33 , 9.36, 37.2);
541 AliMaterial(17, "Epoxy", 17.75, 8.9, 1.8 , 21.82, 999.0);
544 AliMixture(3, "Polyethilene", ape, zpe, dpe, -2, wpe);
545 AliMixture(7, "Mylar", amy, zmy, dmy, -3, wmy);
546 AliMixture(8, "CO2", aco, zco, dco, -2, wco);
547 AliMixture(9, "Isobutane", ais, zis, dis, -2, wis);
548 AliMixture(13,"Water", awa, zwa, dwa, -2, wwa);
549 AliMixture(14,"Plexiglas", apg, zpg, dpg, -3, wpg);
552 Char_t namate[21]="";
554 // Get properties of Xe
555 gMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
556 // Get properties of CO2
557 gMC->Gfmate((*fIdmate)[8], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
558 // Create gas mixture
561 dgm1 = wgm[0] * dxe + wgm[1] * dco;
562 AliMixture(10, "Gas mixture 1", agm, zgm, dgm1, 2, wgm);
563 // Xe/Isobutane-mixture
564 // Get properties of Xe
565 gMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
566 // Get properties of Isobutane
567 gMC->Gfmate((*fIdmate)[9], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
568 // Create gas mixture
571 dgm2 = wgm[0] * dxe + wgm[1] * dis;
572 AliMixture(11, "Gas mixture 2", agm, zgm, dgm2, 2, wgm);
574 //////////////////////////////////////////////////////////////////////////
575 // Tracking Media Parameters
576 //////////////////////////////////////////////////////////////////////////
579 AliMedium(1, "Al Frame", 1, 0, isxfld, sxmgmx
580 , tmaxfd, stemax, deemax, epsil, stmin);
582 AliMedium(2, "Air", 2, 0, isxfld, sxmgmx
583 , tmaxfd, stemax, deemax, epsil, stmin);
585 AliMedium(3, "Radiator", 3, 0, isxfld, sxmgmx
586 , tmaxfd, stemax, deemax, epsil, stmin);
588 AliMedium(4, "Xe", 4, 1, isxfld, sxmgmx
589 , tmaxfd, stemax, deemax, epsil, stmin);
591 AliMedium(5, "Padplane", 5, 1, isxfld, sxmgmx
592 , tmaxfd, stemax, deemax, epsil, stmin);
594 AliMedium(6, "Readout", 1, 0, isxfld, sxmgmx
595 , tmaxfd, stemax, deemax, epsil, stmin);
597 AliMedium(7, "C Frame", 6, 0, isxfld, sxmgmx
598 , tmaxfd, stemax, deemax, epsil, stmin);
600 AliMedium(8, "Mylar", 7, 0, isxfld, sxmgmx
601 , tmaxfd, stemax, deemax, epsil, stmin);
603 // Gas-mixture (Xe/CO2)
604 AliMedium(9, "Gas-mix", 10, 1, isxfld, sxmgmx
605 , tmaxfd, stemax, deemax, epsil, stmin);
608 // Gas-mixture (Xe/Isobutane)
609 AliMedium(9, "Gas-mix", 11, 1, isxfld, sxmgmx
610 , tmaxfd, stemax, deemax, epsil, stmin);
612 // Nomex-honeycomb (use carbon for the time being)
613 AliMedium(10, "Nomex", 6, 0, isxfld, sxmgmx
614 , tmaxfd, stemax, deemax, epsil, stmin);
615 // Kapton foils (use Mylar for the time being)
616 AliMedium(11, "Kapton", 7, 0, isxfld, sxmgmx
617 , tmaxfd, stemax, deemax, epsil, stmin);
618 // Gas-filling of the radiator
619 AliMedium(12, "CO2", 8, 0, isxfld, sxmgmx
620 , tmaxfd, stemax, deemax, epsil, stmin);
622 AliMedium(13, "G10-plates",12, 0, isxfld, sxmgmx
623 , tmaxfd, stemax, deemax, epsil, stmin);
625 AliMedium(14, "Water", 13, 0, isxfld, sxmgmx
626 , tmaxfd, stemax, deemax, epsil, stmin);
627 // Rohacell (plexiglas) for the radiator
628 AliMedium(15, "Rohacell", 14, 0, isxfld, sxmgmx
629 , tmaxfd, stemax, deemax, epsil, stmin);
631 AliMedium(16, "MCM-Al" , 1, 0, isxfld, sxmgmx
632 , tmaxfd, stemax, deemax, epsil, stmin);
634 AliMedium(17, "MCM-Sn" , 15, 0, isxfld, sxmgmx
635 , tmaxfd, stemax, deemax, epsil, stmin);
637 AliMedium(18, "MCM-Cu" , 5, 0, isxfld, sxmgmx
638 , tmaxfd, stemax, deemax, epsil, stmin);
640 AliMedium(19, "MCM-G10" , 12, 0, isxfld, sxmgmx
641 , tmaxfd, stemax, deemax, epsil, stmin);
642 // Si in readout chips
643 AliMedium(20, "Chip-Si" , 16, 0, isxfld, sxmgmx
644 , tmaxfd, stemax, deemax, epsil, stmin);
645 // Epoxy in readout chips
646 AliMedium(21, "Chip-Ep" , 17, 0, isxfld, sxmgmx
647 , tmaxfd, stemax, deemax, epsil, stmin);
649 AliMedium(22, "Conn-PE" , 3, 0, isxfld, sxmgmx
650 , tmaxfd, stemax, deemax, epsil, stmin);
652 AliMedium(23, "Chip-Cu" , 5, 0, isxfld, sxmgmx
653 , tmaxfd, stemax, deemax, epsil, stmin);
654 // Al of cooling pipes
655 AliMedium(24, "Cooling" , 1, 0, isxfld, sxmgmx
656 , tmaxfd, stemax, deemax, epsil, stmin);
658 AliMedium(25, "Serv-Cu" , 5, 0, isxfld, sxmgmx
659 , tmaxfd, stemax, deemax, epsil, stmin);
661 // Save the density values for the TRD absorbtion
670 //_____________________________________________________________________________
671 void AliTRD::DrawModule() const
674 // Draw a shaded view of the Transition Radiation Detector version 0
677 // Set everything unseen
678 gMC->Gsatt("*" ,"SEEN",-1);
680 // Set ALIC mother transparent
681 gMC->Gsatt("ALIC","SEEN", 0);
683 // Set the volumes visible
684 if (fGeometry->IsVersion() == 0) {
685 gMC->Gsatt("B071","SEEN", 0);
686 gMC->Gsatt("B074","SEEN", 0);
687 gMC->Gsatt("B075","SEEN", 0);
688 gMC->Gsatt("B077","SEEN", 0);
689 gMC->Gsatt("BTR1","SEEN", 0);
690 gMC->Gsatt("BTR2","SEEN", 0);
691 gMC->Gsatt("BTR3","SEEN", 0);
692 gMC->Gsatt("UTR1","SEEN", 0);
693 gMC->Gsatt("UTR2","SEEN", 0);
694 gMC->Gsatt("UTR3","SEEN", 0);
697 gMC->Gsatt("B071","SEEN", 0);
698 gMC->Gsatt("B074","SEEN", 0);
699 gMC->Gsatt("B075","SEEN", 0);
700 gMC->Gsatt("B077","SEEN", 0);
701 gMC->Gsatt("BTR1","SEEN", 0);
702 gMC->Gsatt("BTR2","SEEN", 0);
703 gMC->Gsatt("BTR3","SEEN", 0);
704 gMC->Gsatt("UTR1","SEEN", 0);
705 if (fGeometry->GetPHOShole())
706 gMC->Gsatt("UTR2","SEEN", 0);
707 if (fGeometry->GetRICHhole())
708 gMC->Gsatt("UTR3","SEEN", 0);
710 // gMC->Gsatt("UCII","SEEN", 0);
711 // gMC->Gsatt("UCIM","SEEN", 0);
712 // gMC->Gsatt("UCIO","SEEN", 0);
713 // gMC->Gsatt("UL02","SEEN", 1);
714 // gMC->Gsatt("UL05","SEEN", 1);
715 // gMC->Gsatt("UL06","SEEN", 1);
717 gMC->Gdopt("hide", "on");
718 gMC->Gdopt("shad", "on");
719 gMC->Gsatt("*", "fill", 7);
720 gMC->SetClipBox(".");
721 gMC->SetClipBox("*", 0, 2000, -2000, 2000, -2000, 2000);
723 gMC->Gdraw("alic", 40, 30, 0, 12, 9.4, .021, .021);
724 gMC->Gdhead(1111, "Transition Radiation Detector");
725 gMC->Gdman(18, 4, "MAN");
729 //_____________________________________________________________________________
730 Int_t AliTRD::DistancetoPrimitive(Int_t , Int_t ) const
733 // Distance between the mouse and the TRD detector on the screen
740 //_____________________________________________________________________________
744 // Initialize the TRD detector after the geometry has been created
750 printf("\n%s: ",ClassName());
751 for (i = 0; i < 35; i++) printf("*");
752 printf(" TRD_INIT ");
753 for (i = 0; i < 35; i++) printf("*");
757 if (fGeometry->IsVersion() == 1) {
758 printf("%s: Full geometry version initialized\n",ClassName());
759 if (fGeometry->GetPHOShole())
760 printf("%s: Leave space in front of PHOS free\n",ClassName());
761 if (fGeometry->GetRICHhole())
762 printf("%s: Leave space in front of RICH free\n",ClassName());
765 printf("%s: Not a valid geometry\n",ClassName());
769 printf("%s: Gas Mixture: 85%% Xe + 15%% CO2\n",ClassName());
772 printf("%s: Gas Mixture: 97%% Xe + 3%% Isobutane\n",ClassName());
777 //_____________________________________________________________________________
778 void AliTRD::LoadPoints(Int_t )
781 // Store x, y, z of all hits in memory.
782 // Hit originating from TR photons are given a different color
786 // AliDetector::LoadPoints(track);
790 if (fHits == 0) return;
792 Int_t nhits = fHits->GetEntriesFast();
793 if (nhits == 0) return;
795 Int_t tracks = gAlice->GetMCApp()->GetNtrack();
796 if (fPoints == 0) fPoints = new TObjArray(tracks);
800 Int_t *ntrkE = new Int_t[tracks];
801 Int_t *ntrkT = new Int_t[tracks];
802 Int_t *limiE = new Int_t[tracks];
803 Int_t *limiT = new Int_t[tracks];
804 Float_t **coorE = new Float_t*[tracks];
805 Float_t **coorT = new Float_t*[tracks];
806 for(Int_t i = 0; i < tracks; i++) {
815 AliTRDpoints *points = 0;
818 Int_t chunk = nhits / 4 + 1;
820 // Loop over all the hits and store their position
821 ahit = (AliTRDhit *) FirstHit(-1);
825 if (ahit->GetCharge() >= 0) {
827 trk = ahit->GetTrack();
828 if (ntrkE[trk] == limiE[trk]) {
829 // Initialise a new track
830 fp = new Float_t[3*(limiE[trk]+chunk)];
832 memcpy(fp,coorE[trk],sizeof(Float_t)*3*limiE[trk]);
833 delete [] coorE[trk];
841 fp[3*ntrkE[trk] ] = ahit->X();
842 fp[3*ntrkE[trk]+1] = ahit->Y();
843 fp[3*ntrkE[trk]+2] = ahit->Z();
848 else if ((ahit->GetCharge() < 0) && (fDrawTR)) {
850 trk = ahit->GetTrack();
851 if (ntrkT[trk] == limiT[trk]) {
852 // Initialise a new track
853 fp = new Float_t[3*(limiT[trk]+chunk)];
855 memcpy(fp,coorT[trk],sizeof(Float_t)*3*limiT[trk]);
856 delete [] coorT[trk];
864 fp[3*ntrkT[trk] ] = ahit->X();
865 fp[3*ntrkT[trk]+1] = ahit->Y();
866 fp[3*ntrkT[trk]+2] = ahit->Z();
871 ahit = (AliTRDhit *) NextHit();
875 for (trk = 0; trk < tracks; ++trk) {
877 if (ntrkE[trk] || ntrkT[trk]) {
879 points = new AliTRDpoints();
880 points->SetDetector(this);
881 points->SetParticle(trk);
883 // Set the dEdx points
885 points->SetMarkerColor(GetMarkerColor());
886 points->SetMarkerSize(GetMarkerSize());
887 points->SetPolyMarker(ntrkE[trk],coorE[trk],GetMarkerStyle());
888 delete [] coorE[trk];
892 // Set the TR photon points
894 points->SetTRpoints(ntrkT[trk],coorT[trk]);
895 delete [] coorT[trk];
899 fPoints->AddAt(points,trk);
914 //_____________________________________________________________________________
915 void AliTRD::MakeBranch(Option_t* option)
918 // Create Tree branches for the TRD digits.
921 Int_t buffersize = 4000;
922 Char_t branchname[15];
923 sprintf(branchname,"%s",GetName());
925 const char *cD = strstr(option,"D");
927 AliDetector::MakeBranch(option);
929 if (fDigits && gAlice->TreeD() && cD) {
930 MakeBranchInTree(gAlice->TreeD(),branchname,&fDigits,buffersize,0);
935 //_____________________________________________________________________________
936 void AliTRD::ResetDigits()
939 // Reset number of digits and the digits array for this detector
943 if (fDigits) fDigits->Clear();
947 //_____________________________________________________________________________
948 void AliTRD::SetTreeAddress()
951 // Set the branch addresses for the trees.
954 if ( fLoader->TreeH() && (fHits == 0x0)) {
955 fHits = new TClonesArray("AliTRDhit",405);
957 AliDetector::SetTreeAddress();
961 //_____________________________________________________________________________
962 void AliTRD::SetGasMix(Int_t imix)
965 // Defines the gas mixture (imix=0: Xe/Isobutane imix=1: Xe/CO2)
968 if ((imix < 0) || (imix > 1)) {
969 printf("Wrong input value: %d\n",imix);
970 printf("Use standard setting\n");
979 //_____________________________________________________________________________
980 void AliTRD::SetPHOShole()
983 // Selects a geometry with a hole in front of the PHOS
986 fGeometry->SetPHOShole();
990 //_____________________________________________________________________________
991 void AliTRD::SetRICHhole()
994 // Selects a geometry with a hole in front of the RICH
997 fGeometry->SetRICHhole();
1001 //_____________________________________________________________________________
1002 AliTRD &AliTRD::operator=(const AliTRD &trd)
1005 // Assignment operator
1008 if (this != &trd) ((AliTRD &) trd).Copy(*this);