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"
47 #include "AliTrackReference.h"
50 #include "AliTRDdigit.h"
51 #include "AliTRDdigitizer.h"
52 #include "AliTRDdigitsManager.h"
53 #include "AliTRDgeometry.h"
54 #include "AliTRDhit.h"
55 #include "AliTRDpoints.h"
56 #include "AliTRDrawData.h"
57 #include "AliTRDSimParam.h"
58 #include "AliTRDRecParam.h"
59 #include "AliTRDCommonParam.h"
60 #include "AliTRDcalibDB.h"
64 //_____________________________________________________________________________
74 // Default constructor
79 //_____________________________________________________________________________
80 AliTRD::AliTRD(const char *name, const char *title)
81 :AliDetector(name,title)
89 // Standard constructor for the TRD
92 // Check that FRAME is there otherwise we have no place where to put TRD
93 AliModule *frame = gAlice->GetModule("FRAME");
95 AliError("TRD needs FRAME to be present\n");
99 // Define the TRD geometry
100 if ((frame->IsVersion() == 0) ||
101 (frame->IsVersion() == 1)) {
102 fGeometry = new AliTRDgeometry();
105 AliError("Could not find valid FRAME version\n");
110 TDirectory *saveDir = gDirectory;
111 gAlice->GetRunLoader()->CdGAFile();
112 fGeometry->Write("TRDgeometry");
115 // Allocate the hit array
116 fHits = new TClonesArray("AliTRDhit",405);
117 gAlice->GetMCApp()->AddHitList(fHits);
119 SetMarkerColor(kWhite);
123 //_____________________________________________________________________________
124 AliTRD::AliTRD(const AliTRD &trd)
126 ,fGeometry(trd.fGeometry)
127 ,fGasDensity(trd.fGasDensity)
128 ,fFoilDensity(trd.fFoilDensity)
129 ,fDrawTR(trd.fDrawTR)
130 ,fDisplayType(trd.fDisplayType)
138 //_____________________________________________________________________________
157 //_____________________________________________________________________________
158 void AliTRD::Hits2Digits()
164 AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class");
165 AliLog::SetClassDebugLevel("TRDdigitizer",AliDebugLevel());
168 digitizer.InitDetector();
170 if (!fLoader->TreeH()) {
171 fLoader->LoadHits("read");
173 fLoader->LoadDigits("recreate");
175 AliRunLoader *runLoader = fLoader->GetRunLoader();
177 for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) {
178 runLoader->GetEvent(iEvent);
179 digitizer.Open(runLoader,iEvent);
180 digitizer.MakeDigits();
181 digitizer.WriteDigits();
184 fLoader->UnloadHits();
185 fLoader->UnloadDigits();
189 //_____________________________________________________________________________
190 void AliTRD::Hits2SDigits()
193 // Create summable digits
196 AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class");
197 // For the summable digits
198 digitizer.SetSDigits(kTRUE);
199 AliLog::SetClassDebugLevel("TRDdigitizer",AliDebugLevel());
202 digitizer.InitDetector();
204 if (!fLoader->TreeH()) {
205 fLoader->LoadHits("read");
207 fLoader->LoadSDigits("recreate");
209 AliRunLoader *runLoader = fLoader->GetRunLoader();
211 for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) {
212 runLoader->GetEvent(iEvent);
213 digitizer.Open(runLoader,iEvent);
214 digitizer.MakeDigits();
215 digitizer.WriteDigits();
218 fLoader->UnloadHits();
219 fLoader->UnloadSDigits();
223 //_____________________________________________________________________________
224 AliDigitizer *AliTRD::CreateDigitizer(AliRunDigitizer *manager) const
227 // Creates a new digitizer object
230 return new AliTRDdigitizer(manager);
234 //_____________________________________________________________________________
235 void AliTRD::SDigits2Digits()
238 // Create final digits from summable digits
241 // Create the TRD digitizer
242 AliTRDdigitizer digitizer("TRDdigitizer","TRD digitizer class");
243 AliLog::SetClassDebugLevel("TRDdigitizer",AliDebugLevel());
246 digitizer.SetEvent(gAlice->GetEvNumber());
249 digitizer.InitDetector();
251 // Read the s-digits via digits manager
252 AliTRDdigitsManager sdigitsManager;
254 AliLog::SetClassDebugLevel("TRDdigitisManager",AliDebugLevel());
255 sdigitsManager.SetSDigits(kTRUE);
256 sdigitsManager.CreateArrays();
258 if (!fLoader->TreeS()) {
259 if (fLoader->LoadSDigits("read")) {
263 if (!fLoader->TreeS()) {
264 AliError(Form("Error while reading SDigits for event %d",gAlice->GetEvNumber()));
268 sdigitsManager.ReadDigits(fLoader->TreeS());
270 // Add the s-digits to the input list
271 digitizer.AddSDigitsManager(&sdigitsManager);
273 // Convert the s-digits to normal digits
274 digitizer.SDigits2Digits();
277 if (!fLoader->TreeD()) {
278 fLoader->MakeTree("D");
280 if (digitizer.MakeBranch(fLoader->TreeD())){
281 digitizer.WriteDigits();
286 //_____________________________________________________________________________
287 void AliTRD::Digits2Raw()
290 // Convert digits of the current event to raw data
293 fLoader->LoadDigits();
294 TTree *digits = fLoader->TreeD();
296 AliError("No digits tree");
300 AliTRDrawData rawWriter;
301 if (!rawWriter.Digits2Raw(digits)) {
302 AliError("The raw writer could not load the digits tree");
305 fLoader->UnloadDigits();
309 //_____________________________________________________________________________
310 void AliTRD::AddHit(Int_t track, Int_t det, Float_t *hits, Int_t q
314 // Add a hit for the TRD
317 TClonesArray &lhits = *fHits;
318 AliTRDhit *hit = new(lhits[fNhits++]) AliTRDhit(fIshunt,track,det,hits,q);
324 hit->SetAmplification();
333 //_____________________________________________________________________________
334 void AliTRD::BuildGeometry()
337 // Create the ROOT TNode geometry for the TRD
350 const Int_t kColorTRD = 46;
352 // Find the top node alice
353 top = gAlice->GetGeometry()->GetNode("alice");
355 if (fDisplayType == 0) {
357 pgon = new TPGON("S_TRD","TRD","void",0,360,AliTRDgeometry::Nsect(),4);
358 rmin = AliTRDgeometry::Rmin();
359 rmax = AliTRDgeometry::Rmax();
360 pgon->DefineSection(0,-AliTRDgeometry::Zmax1(),rmax,rmax);
361 pgon->DefineSection(1,-AliTRDgeometry::Zmax2(),rmin,rmax);
362 pgon->DefineSection(2, AliTRDgeometry::Zmax2(),rmin,rmax);
363 pgon->DefineSection(3, AliTRDgeometry::Zmax1(),rmax,rmax);
365 node = new TNode("TRD","TRD","S_TRD",0,0,0,"");
366 node->SetLineColor(kColorTRD);
370 else if (fDisplayType == 1) {
374 Float_t slope = (AliTRDgeometry::Zmax1() - AliTRDgeometry::Zmax2())
375 / (AliTRDgeometry::Rmax() - AliTRDgeometry::Rmin());
377 rmin = AliTRDgeometry::Rmin() + AliTRDgeometry::CraHght();
378 rmax = rmin + AliTRDgeometry::CdrHght();
380 Float_t thickness = rmin - AliTRDgeometry::Rmin();
381 zmax2 = AliTRDgeometry::Zmax2() + slope * thickness;
382 zmax1 = zmax2 + slope * AliTRDgeometry::DrThick();
384 for (iPlan = 0; iPlan < AliTRDgeometry::Nplan(); iPlan++) {
386 sprintf(name,"S_TR1%d",iPlan);
387 pgon = new TPGON(name,"TRD","void",0,360,AliTRDgeometry::Nsect(),4);
388 pgon->DefineSection(0,-zmax1,rmax,rmax);
389 pgon->DefineSection(1,-zmax2,rmin,rmax);
390 pgon->DefineSection(2, zmax2,rmin,rmax);
391 pgon->DefineSection(3, zmax1,rmax,rmax);
393 node = new TNode("TRD","TRD",name,0,0,0,"");
394 node->SetLineColor(kColorTRD);
397 Float_t height = AliTRDgeometry::Cheight() + AliTRDgeometry::Cspace();
398 rmin = rmin + height;
399 rmax = rmax + height;
400 zmax1 = zmax1 + slope * height;
401 zmax2 = zmax2 + slope * height;
405 thickness += AliTRDgeometry::DrThick();
406 rmin = AliTRDgeometry::Rmin() + thickness;
407 rmax = rmin + AliTRDgeometry::AmThick();
408 zmax2 = AliTRDgeometry::Zmax2() + slope * thickness;
409 zmax1 = zmax2 + slope * AliTRDgeometry::AmThick();
411 for (iPlan = 0; iPlan < AliTRDgeometry::Nplan(); iPlan++) {
413 sprintf(name,"S_TR2%d",iPlan);
414 pgon = new TPGON(name,"TRD","void",0,360,AliTRDgeometry::Nsect(),4);
415 pgon->DefineSection(0,-zmax1,rmax,rmax);
416 pgon->DefineSection(1,-zmax2,rmin,rmax);
417 pgon->DefineSection(2, zmax2,rmin,rmax);
418 pgon->DefineSection(3, zmax1,rmax,rmax);
420 node = new TNode("TRD","TRD",name,0,0,0,"");
421 node->SetLineColor(kColorTRD);
424 Float_t height = AliTRDgeometry::Cheight() + AliTRDgeometry::Cspace();
425 rmin = rmin + height;
426 rmax = rmax + height;
427 zmax1 = zmax1 + slope * height;
428 zmax2 = zmax2 + slope * height;
436 //_____________________________________________________________________________
437 void AliTRD::Copy(TObject &trd) const
443 ((AliTRD &) trd).fGeometry = fGeometry;
444 ((AliTRD &) trd).fGasDensity = fGasDensity;
445 ((AliTRD &) trd).fFoilDensity = fFoilDensity;
446 ((AliTRD &) trd).fDrawTR = fDrawTR;
447 ((AliTRD &) trd).fDisplayType = fDisplayType;
451 //_____________________________________________________________________________
452 void AliTRD::CreateGeometry()
455 // Creates the volumes for the TRD chambers
458 // Check that FRAME is there otherwise we have no place where to put the TRD
459 AliModule *frame = gAlice->GetModule("FRAME");
461 AliFatal("The TRD needs the FRAME to be defined first");
464 fGeometry->CreateGeometry(fIdtmed->GetArray() - 1299);
468 //_____________________________________________________________________________
469 void AliTRD::CreateMaterials()
472 // Create the materials for the TRD
475 Int_t isxfld = gAlice->Field()->Integ();
476 Float_t sxmgmx = gAlice->Field()->Max();
478 // For polyethilene (CH2)
479 Float_t ape[2] = { 12.011 , 1.0079 };
480 Float_t zpe[2] = { 6.0 , 1.0 };
481 Float_t wpe[2] = { 1.0 , 2.0 };
484 // For mylar (C5H4O2)
485 Float_t amy[3] = { 12.011 , 1.0079, 15.9994 };
486 Float_t zmy[3] = { 6.0 , 1.0 , 8.0 };
487 Float_t wmy[3] = { 5.0 , 4.0 , 2.0 };
491 Float_t aco[2] = { 12.011 , 15.9994 };
492 Float_t zco[2] = { 6.0 , 8.0 };
493 Float_t wco[2] = { 1.0 , 2.0 };
494 Float_t dco = 0.00186;
497 Float_t awa[2] = { 1.0079, 15.9994 };
498 Float_t zwa[2] = { 1.0 , 8.0 };
499 Float_t wwa[2] = { 2.0 , 1.0 };
502 // For isobutane (C4H10)
503 Float_t ais[2] = { 12.011 , 1.0079 };
504 Float_t zis[2] = { 6.0 , 1.0 };
505 Float_t wis[2] = { 4.0 , 10.0 };
506 Float_t dis = 0.00267;
508 // For plexiglas (C5H8O2)
509 Float_t apg[3] = { 12.011 , 1.0079, 15.9994 };
510 Float_t zpg[3] = { 6.0 , 1.0 , 8.0 };
511 Float_t wpg[3] = { 5.0 , 8.0 , 2.0 };
514 // For epoxy (C18H19O3)
515 Float_t aEpoxy[3] = { 15.9994, 1.0079, 12.011 };
516 Float_t zEpoxy[3] = { 8.0 , 1.0 , 6.0 };
517 Float_t wEpoxy[3] = { 3.0 , 19.0 , 18.0 };
518 Float_t dEpoxy = 1.8 ;
521 Float_t aAir[4] = { 12.011 , 14.0 , 15.9994 , 36.0 };
522 Float_t zAir[4] = { 6.0 , 7.0 , 8.0 , 18.0 };
523 Float_t wAir[4] = { 0.000124, 0.755267, 0.231781, 0.012827 };
524 Float_t dAir = 1.20479E-3;
527 Float_t aG10[4] = { 1.0079 , 12.011 , 15.9994 , 28.086 };
528 Float_t zG10[4] = { 1.0 , 6.0 , 8.0 , 14.0 };
529 Float_t wG10[4] = { 0.15201 , 0.10641 , 0.49444 , 0.24714 };
532 // For Xe/CO2-gas-mixture
533 Float_t aXeCO2[3] = { 131.29 , 12.0107 , 15.9994 };
534 Float_t zXeCO2[3] = { 54.0 , 6.0 , 8.0 };
535 // Move to number of atoms
536 Float_t wXeCO2[3] = { 8.5 , 1.5 , 3.0 };
537 // Xe-content of the Xe/CO2-mixture (85% / 15%)
539 Float_t dxe = 0.00549;
540 Float_t dgm = fxc * dxe + (1.0 - fxc) * dco;
542 // General tracking parameter
543 Float_t tmaxfd = -10.0;
544 Float_t stemax = -1.0e10;
545 Float_t deemax = -0.1;
546 Float_t epsil = 1.0e-4;
547 Float_t stmin = -0.001;
549 //////////////////////////////////////////////////////////////////////////
551 //////////////////////////////////////////////////////////////////////////
553 AliMaterial( 1, "Al" , 26.98, 13.0, 2.7 , 8.9 , 37.2);
554 AliMaterial( 4, "Xe" , 131.29, 54.0, dxe , 1546.16, 0.0);
555 AliMaterial( 5, "Cu" , 63.54, 29.0, 8.96 , 1.43, 14.8);
556 AliMaterial( 6, "C" , 12.01, 6.0, 2.265 , 18.8 , 74.4);
557 AliMaterial(15, "Sn" , 118.71, 50.0, 7.31 , 1.21, 14.8);
558 AliMaterial(16, "Si" , 28.09, 14.0, 2.33 , 9.36, 37.2);
561 AliMixture(2, "Air" , aAir, zAir, dAir, 4, wAir );
562 AliMixture(3, "Polyethilene", ape, zpe, dpe, -2, wpe );
563 AliMixture(7, "Mylar", amy, zmy, dmy, -3, wmy );
564 AliMixture(8, "CO2", aco, zco, dco, -2, wco );
565 AliMixture(9, "Isobutane", ais, zis, dis, -2, wis );
566 AliMixture(10,"Gas mixture", aXeCO2, zXeCO2, dgm, -3, wXeCO2);
567 AliMixture(12,"G10", aG10, zG10, dG10, 4, wG10 );
568 AliMixture(13,"Water", awa, zwa, dwa, -2, wwa );
569 AliMixture(14,"Plexiglas", apg, zpg, dpg, -3, wpg );
570 AliMixture(17,"Epoxy", aEpoxy, zEpoxy, dEpoxy, -3, wEpoxy);
572 //////////////////////////////////////////////////////////////////////////
573 // Tracking Media Parameters
574 //////////////////////////////////////////////////////////////////////////
577 AliMedium(1, "Al Frame", 1, 0, isxfld, sxmgmx
578 , tmaxfd, stemax, deemax, epsil, stmin);
580 AliMedium(2, "Air", 2, 0, isxfld, sxmgmx
581 , tmaxfd, stemax, deemax, epsil, stmin);
583 AliMedium(3, "Radiator", 3, 0, isxfld, sxmgmx
584 , tmaxfd, stemax, deemax, epsil, stmin);
586 AliMedium(4, "Xe", 4, 1, isxfld, sxmgmx
587 , tmaxfd, stemax, deemax, epsil, stmin);
589 AliMedium(5, "Padplane", 5, 1, isxfld, sxmgmx
590 , tmaxfd, stemax, deemax, epsil, stmin);
592 AliMedium(6, "Readout", 5, 0, isxfld, sxmgmx
593 , tmaxfd, stemax, deemax, epsil, stmin);
595 AliMedium(7, "C Frame", 6, 0, isxfld, sxmgmx
596 , tmaxfd, stemax, deemax, epsil, stmin);
598 AliMedium(8, "Mylar", 7, 0, isxfld, sxmgmx
599 , tmaxfd, stemax, deemax, epsil, stmin);
600 // Gas-mixture (Xe/CO2)
601 AliMedium(9, "Gas-mix", 10, 1, isxfld, sxmgmx
602 , tmaxfd, stemax, deemax, epsil, stmin);
603 // Nomex-honeycomb (use carbon for the time being)
604 AliMedium(10, "Nomex", 6, 0, isxfld, sxmgmx
605 , tmaxfd, stemax, deemax, epsil, stmin);
606 // Kapton foils (use Mylar for the time being)
607 AliMedium(11, "Kapton", 7, 0, isxfld, sxmgmx
608 , tmaxfd, stemax, deemax, epsil, stmin);
609 // Gas-filling of the radiator
610 AliMedium(12, "CO2", 8, 0, isxfld, sxmgmx
611 , tmaxfd, stemax, deemax, epsil, stmin);
613 AliMedium(13, "G10-plates",12, 0, isxfld, sxmgmx
614 , tmaxfd, stemax, deemax, epsil, stmin);
616 AliMedium(14, "Water", 13, 0, isxfld, sxmgmx
617 , tmaxfd, stemax, deemax, epsil, stmin);
618 // Rohacell (plexiglas) for the radiator
619 AliMedium(15, "Rohacell", 14, 0, isxfld, sxmgmx
620 , tmaxfd, stemax, deemax, epsil, stmin);
622 AliMedium(16, "MCM-Al" , 1, 0, isxfld, sxmgmx
623 , tmaxfd, stemax, deemax, epsil, stmin);
625 AliMedium(17, "MCM-Sn" , 15, 0, isxfld, sxmgmx
626 , tmaxfd, stemax, deemax, epsil, stmin);
628 AliMedium(18, "MCM-Cu" , 5, 0, isxfld, sxmgmx
629 , tmaxfd, stemax, deemax, epsil, stmin);
631 AliMedium(19, "MCM-G10" , 12, 0, isxfld, sxmgmx
632 , tmaxfd, stemax, deemax, epsil, stmin);
633 // Si in readout chips
634 AliMedium(20, "Chip-Si" , 16, 0, isxfld, sxmgmx
635 , tmaxfd, stemax, deemax, epsil, stmin);
636 // Epoxy in readout chips
637 AliMedium(21, "Chip-Ep" , 17, 0, isxfld, sxmgmx
638 , tmaxfd, stemax, deemax, epsil, stmin);
640 AliMedium(22, "Conn-PE" , 3, 0, isxfld, sxmgmx
641 , tmaxfd, stemax, deemax, epsil, stmin);
643 AliMedium(23, "Chip-Cu" , 5, 0, isxfld, sxmgmx
644 , tmaxfd, stemax, deemax, epsil, stmin);
645 // Al of cooling pipes
646 AliMedium(24, "Cooling" , 1, 0, isxfld, sxmgmx
647 , tmaxfd, stemax, deemax, epsil, stmin);
649 AliMedium(25, "Serv-Cu" , 5, 0, isxfld, sxmgmx
650 , tmaxfd, stemax, deemax, epsil, stmin);
652 // Save the density values for the TRD absorbtion
658 //_____________________________________________________________________________
659 void AliTRD::DrawModule() const
662 // Draw a shaded view of the Transition Radiation Detector version 0
665 // Set everything unseen
666 gMC->Gsatt("*" ,"SEEN",-1);
668 // Set ALIC mother transparent
669 gMC->Gsatt("ALIC","SEEN", 0);
671 // Set the volumes visible
672 if (fGeometry->IsVersion() == 0) {
673 gMC->Gsatt("B071","SEEN", 0);
674 gMC->Gsatt("B074","SEEN", 0);
675 gMC->Gsatt("B075","SEEN", 0);
676 gMC->Gsatt("B077","SEEN", 0);
677 gMC->Gsatt("BTR1","SEEN", 0);
678 gMC->Gsatt("BTR2","SEEN", 0);
679 gMC->Gsatt("BTR3","SEEN", 0);
680 gMC->Gsatt("UTR1","SEEN", 0);
681 gMC->Gsatt("UTR2","SEEN", 0);
682 gMC->Gsatt("UTR3","SEEN", 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);
695 gMC->Gdopt("hide", "on");
696 gMC->Gdopt("shad", "on");
697 gMC->Gsatt("*", "fill", 7);
698 gMC->SetClipBox(".");
699 gMC->SetClipBox("*", 0, 2000, -2000, 2000, -2000, 2000);
701 gMC->Gdraw("alic", 40, 30, 0, 12, 9.4, .021, .021);
702 gMC->Gdhead(1111, "Transition Radiation Detector");
703 gMC->Gdman(18, 4, "MAN");
707 //_____________________________________________________________________________
708 Int_t AliTRD::DistancetoPrimitive(Int_t , Int_t )
711 // Distance between the mouse and the TRD detector on the screen
719 //_____________________________________________________________________________
723 // Initialize the TRD detector after the geometry has been created
726 AliDebug(1,"++++++++++++++++++++++++++++++++++++++++++++++");
728 if (fGeometry->IsVersion() != 1) {
729 AliError("Not a valid geometry");
734 //_____________________________________________________________________________
735 void AliTRD::LoadPoints(Int_t )
738 // Store x, y, z of all hits in memory.
739 // Hit originating from TR photons are given a different color
746 Int_t nhits = fHits->GetEntriesFast();
751 Int_t tracks = gAlice->GetMCApp()->GetNtrack();
753 fPoints = new TObjArray(tracks);
758 Int_t *ntrkE = new Int_t[tracks];
759 Int_t *ntrkT = new Int_t[tracks];
760 Int_t *limiE = new Int_t[tracks];
761 Int_t *limiT = new Int_t[tracks];
762 Float_t **coorE = new Float_t*[tracks];
763 Float_t **coorT = new Float_t*[tracks];
764 for(Int_t i = 0; i < tracks; i++) {
773 AliTRDpoints *points = 0;
776 Int_t chunk = nhits / 4 + 1;
778 // Loop over all the hits and store their position
779 ahit = (AliTRDhit *) FirstHit(-1);
783 if (ahit->GetCharge() >= 0) {
785 trk = ahit->GetTrack();
786 if (ntrkE[trk] == limiE[trk]) {
787 // Initialise a new track
788 fp = new Float_t[3*(limiE[trk]+chunk)];
790 memcpy(fp,coorE[trk],sizeof(Float_t)*3*limiE[trk]);
791 delete [] coorE[trk];
799 fp[3*ntrkE[trk] ] = ahit->X();
800 fp[3*ntrkE[trk]+1] = ahit->Y();
801 fp[3*ntrkE[trk]+2] = ahit->Z();
806 else if ((ahit->GetCharge() < 0) &&
809 trk = ahit->GetTrack();
810 if (ntrkT[trk] == limiT[trk]) {
811 // Initialise a new track
812 fp = new Float_t[3*(limiT[trk]+chunk)];
814 memcpy(fp,coorT[trk],sizeof(Float_t)*3*limiT[trk]);
815 delete [] coorT[trk];
823 fp[3*ntrkT[trk] ] = ahit->X();
824 fp[3*ntrkT[trk]+1] = ahit->Y();
825 fp[3*ntrkT[trk]+2] = ahit->Z();
830 ahit = (AliTRDhit *) NextHit();
834 for (trk = 0; trk < tracks; ++trk) {
836 if (ntrkE[trk] || ntrkT[trk]) {
838 points = new AliTRDpoints();
839 points->SetDetector(this);
840 points->SetParticle(trk);
842 // Set the dEdx points
844 points->SetMarkerColor(GetMarkerColor());
845 points->SetMarkerSize(GetMarkerSize());
846 points->SetPolyMarker(ntrkE[trk],coorE[trk],GetMarkerStyle());
847 delete [] coorE[trk];
851 // Set the TR photon points
853 points->SetTRpoints(ntrkT[trk],coorT[trk]);
854 delete [] coorT[trk];
858 fPoints->AddAt(points,trk);
873 //_____________________________________________________________________________
874 void AliTRD::MakeBranch(Option_t *option)
877 // Create Tree branches for the TRD digits.
880 Int_t buffersize = 4000;
881 Char_t branchname[15];
882 sprintf(branchname,"%s",GetName());
884 const Char_t *cD = strstr(option,"D");
886 AliDetector::MakeBranch(option);
891 MakeBranchInTree(gAlice->TreeD(),branchname,&fDigits,buffersize,0);
896 //_____________________________________________________________________________
897 void AliTRD::ResetDigits()
900 // Reset number of digits and the digits array for this detector
911 //_____________________________________________________________________________
912 void AliTRD::SetTreeAddress()
915 // Set the branch addresses for the trees.
918 if (fLoader->TreeH() &&
920 fHits = new TClonesArray("AliTRDhit",405);
922 AliDetector::SetTreeAddress();
926 //_____________________________________________________________________________
927 AliTRD &AliTRD::operator=(const AliTRD &trd)
930 // Assignment operator
933 if (this != &trd) ((AliTRD &) trd).Copy(*this);