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 Revision 1.30 2001/02/09 20:06:26 nilsen
19 Fixed bug in distructor. Can't distroy fixxed length arrays. Thanks Peter.
21 Revision 1.29 2001/02/09 00:05:31 nilsen
22 Added fMajor/MinorVersion variables and made other changes to better make
23 use of the new code changes in AliITSgeom related classes.
25 Revision 1.28 2001/02/02 23:57:28 nilsen
26 Added include file that are no londer included in AliITSgeom.h
28 Revision 1.27 2001/01/30 09:23:13 hristov
29 Streamers removed (R.Brun)
31 Revision 1.26 2000/11/30 11:13:11 barbera
32 Added changes suggested by Federico Carminati on nov, 30, 2000
34 Revision 1.25 2000/10/05 20:50:00 nilsen
35 Now using root generated streamers.
37 Revision 1.14.4.12 2000/10/02 16:04:03 barbera
38 Forward declarations added
40 Revision 1.22 2000/07/10 16:07:19 fca
41 Release version of ITS code
43 Revision 1.14.4.4 2000/05/19 10:10:21 nilsen
44 fix for bug with HP and Sun unix + fix for event display in ITS-working branch
46 Revision 1.14.4.3 2000/03/04 23:46:38 nilsen
47 Fixed up the comments/documentation.
49 Revision 1.14.4.2 2000/03/02 21:53:02 nilsen
50 To make it compatable with the changes in AliRun/AliModule.
52 Revision 1.14.4.1 2000/01/12 19:03:33 nilsen
53 This is the version of the files after the merging done in December 1999.
54 See the ReadMe110100.txt file for details
56 Revision 1.14 1999/10/22 08:16:49 fca
57 Correct destructors, thanks to I.Hrivnacova
59 Revision 1.13 1999/10/06 10:15:19 fca
60 Correct bug in allocation of layer name and add destructor
62 Revision 1.12 1999/10/05 08:05:09 fca
63 Minor corrections for uninitialised variables.
65 Revision 1.11 1999/09/29 09:24:20 fca
66 Introduction of the Copyright and cvs Log
70 ///////////////////////////////////////////////////////////////////////////////
72 // Inner Traking System version 5
73 // This class contains the base procedures for the Inner Tracking System
75 // Authors: R. Barbera, B. S. Nilsen.
77 // Created September 17 1999.
79 ///////////////////////////////////////////////////////////////////////////////
85 #include <TGeometry.h>
88 #include <TFile.h> // only required for Tracking function?
90 #include <TObjArray.h>
91 #include <TLorentzVector.h>
92 #include <TObjString.h>
93 #include <TClonesArray.h>
99 #include "../TGeant3/TGeant3.h"
100 #include "AliITShit.h"
101 #include "AliITSGeant3Geometry.h"
103 #include "AliITSv5.h"
104 #include "AliITSgeom.h"
105 #include "AliITSgeomSPD.h"
106 #include "AliITSgeomSDD.h"
107 #include "AliITSgeomSSD.h"
111 //_____________________________________________________________________________
112 AliITSv5::AliITSv5() {
113 ////////////////////////////////////////////////////////////////////////
114 // Standard default constructor for the ITS version 5.
115 ////////////////////////////////////////////////////////////////////////
121 fEuclidOut = kFALSE; // Don't write Euclide file
122 fGeomDetOut = kFALSE; // Don't write .det file
123 fGeomDetIn = kTRUE; // Read .det file
124 fGeomOldDetIn = kTRUE; // Read old formatted .det file
125 fMajorVersion = IsVersion();
127 for(i=0;i<60;i++) fRead[i] = '\0';
128 for(i=0;i<60;i++) fWrite[i] = '\0';
129 for(i=0;i<60;i++) fEuclidGeomDet[i] = '\0';
131 //_____________________________________________________________________________
132 AliITSv5::AliITSv5(const char *name, const char *title) : AliITS(name, title){
133 ////////////////////////////////////////////////////////////////////////
134 // Standard constructor for the ITS version 5.
135 ////////////////////////////////////////////////////////////////////////
139 fIdName = new TString[fIdN];
146 fIdSens = new Int_t[fIdN];
147 for (i=0;i<fIdN;i++) fIdSens[i] = 0;
148 fEuclidOut = kFALSE; // Don't write Euclide file
149 fGeomDetOut = kFALSE; // Don't write .det file
150 fGeomDetIn = kTRUE; // Read .det file
151 fGeomOldDetIn = kTRUE; // Read old formatted .det file
152 fMajorVersion = IsVersion();
154 for(i=0;i<60;i++) fRead[i] = '\0';
155 for(i=0;i<60;i++) fWrite[i] = '\0';
157 fEuclidMaterial = "$ALICE_ROOT/Euclid/ITSgeometry_5.tme";
158 fEuclidGeometry = "$ALICE_ROOT/Euclid/ITSgeometry_5.euc";
159 strncpy(fEuclidGeomDet,"$ALICE_ROOT/ITS/ITSgeometry_v5.det",60);
160 strncpy(fRead,fEuclidGeomDet,60);
161 strncpy(fWrite,fEuclidGeomDet,60);
163 //____________________________________________________________________________
164 AliITSv5::AliITSv5(const AliITSv5 &source){
165 ////////////////////////////////////////////////////////////////////////
166 // Copy Constructor for ITS version 5.
167 ////////////////////////////////////////////////////////////////////////
168 if(&source == this) return;
169 Warning("Copy Constructor","Not allowed to copy AliITSv5");
172 //_____________________________________________________________________________
173 AliITSv5& AliITSv5::operator=(const AliITSv5 &source){
174 ////////////////////////////////////////////////////////////////////////
175 // Assignment operator for the ITS version 5.
176 ////////////////////////////////////////////////////////////////////////
178 if(&source == this) return *this;
179 Warning("= operator","Not allowed to copy AliITSv5");
183 //_____________________________________________________________________________
184 AliITSv5::~AliITSv5() {
185 ////////////////////////////////////////////////////////////////////////
186 // Standard destructor for the ITS version 5.
187 ////////////////////////////////////////////////////////////////////////
189 //______________________________________________________________________
190 void AliITSv5::BuildGeometry(){
191 ////////////////////////////////////////////////////////////////////////
192 // Geometry builder for the ITS version 5.
193 ////////////////////////////////////////////////////////////////////////
195 // Build ITS TNODE geometry for event display using detailed geometry.
196 // This function builds a simple ITS geometry used by the ROOT macro
201 //const int kColorITSSPD=kRed;
202 //const int kColorITSSDD=kGreen;
203 const int kColorITSSSD=kBlue;
205 AliITSgeom *gm = this->GetITSgeom();
207 top=gAlice->GetGeometry()->GetNode("alice");
216 //TCanvas *c1 = new TCanvas("c1","ITS");
218 for(lay=1;lay<=2;lay++)
219 for(lad=1;lad<=gm->GetNladders(lay);lad++)
220 for(det=1;det<=gm->GetNdetectors(lay);det++){
222 box = new TBRIK ("ActiveSPD","Active volume of SPD","SPD SI DET",
225 cout << "EXCEPTION in box = new TBRIK" << endl;
228 gm->GetTrans(lay,lad,det,xg[0],xg[1],xg[2]);
229 gm->GetRotMatrix(lay,lad,det,rt);
230 //sprintf(name,"ROT%1.1d2.2d2.2d",lay,lad,det);
231 for(i=0;i<9;i++) rtd[i] = rt[i];
233 rm = new TRotMatrix(name,name,rtd);
235 cout << "EXCEPTION in new TRotMatrix" << endl;
239 //sprintf(name,"ND%1.1d2.2d2.2d",lay,lad,det);
241 nd = new TNode("SPD"," ",box,xg[0],xg[1],xg[2],rm);
243 cout << "EXCEPTION in new TNode" << endl;
246 nd->SetLineColor(kColorITSSSD);
250 for(lay=3;lay<=3;lay++)
251 for(lad=1;lad<=gm->GetNladders(lay);lad++)
252 for(det=1;det<=gm->GetNdetectors(lay);det++){
254 box = new TBRIK ("ActiveSDD","Active volume of SDD","SDD SI DET",
257 cout << "EXCEPTION in box = new TBRIK" << endl;
260 gm->GetTrans(lay,lad,det,xg[0],xg[1],xg[2]);
261 gm->GetRotMatrix(lay,lad,det,rt);
262 //sprintf(name,"ROT%1.1d2.2d2.2d",lay,lad,det);
263 for(i=0;i<9;i++) rtd[i] = rt[i];
265 rm = new TRotMatrix(name,name,rtd);
267 cout << "EXCEPTION in new TRotMatrix" << endl;
271 //sprintf(name,"ND%1.1d2.2d2.2d",lay,lad,det);
273 nd = new TNode("SDD"," ",box,xg[0],xg[1],xg[2],rm);
275 cout << "EXCEPTION in new TNode" << endl;
278 nd->SetLineColor(kColorITSSSD);
282 for(lay=4;lay<=4;lay++)
283 for(lad=1;lad<=gm->GetNladders(lay);lad++)
284 for(det=1;det<=gm->GetNdetectors(lay);det++){
286 box = new TBRIK ("ActiveSDD","Active volume of SDD","SDD SI DET",
289 cout << "EXCEPTION in box = new TBRIK" << endl;
292 gm->GetTrans(lay,lad,det,xg[0],xg[1],xg[2]);
293 gm->GetRotMatrix(lay,lad,det,rt);
294 //sprintf(name,"ROT%1.1d2.2d2.2d",lay,lad,det);
295 for(i=0;i<9;i++) rtd[i] = rt[i];
297 rm = new TRotMatrix(name,name,rtd);
299 cout << "EXCEPTION in new TRotMatrix" << endl;
303 //sprintf(name,"ND%1.1d2.2d2.2d",lay,lad,det);
305 nd = new TNode("SDD"," ",box,xg[0],xg[1],xg[2],rm);
307 cout << "EXCEPTION in new TNode" << endl;
310 nd->SetLineColor(kColorITSSSD);
313 for(lay=5;lay<=5;lay++)
314 for(lad=1;lad<=gm->GetNladders(lay);lad++)
315 for(det=1;det<=gm->GetNdetectors(lay);det++){
317 box = new TBRIK ("ActiveSSD","Active volume of SSD","SSD SI DET",
320 cout << "EXCEPTION in box = new TBRIK" << endl;
323 gm->GetTrans(lay,lad,det,xg[0],xg[1],xg[2]);
324 gm->GetRotMatrix(lay,lad,det,rt);
325 //sprintf(name,"ROT%1.1d2.2d2.2d",lay,lad,det);
326 for(i=0;i<9;i++) rtd[i] = rt[i];
328 rm = new TRotMatrix(name,name,rtd);
330 cout << "EXCEPTION in new TRotMatrix" << endl;
334 //sprintf(name,"ND%1.1d2.2d2.2d",lay,lad,det);
336 nd = new TNode("SSD"," ",box,xg[0],xg[1],xg[2],rm);
338 cout << "EXCEPTION in new TNode" << endl;
341 nd->SetLineColor(kColorITSSSD);
345 for(lay=6;lay<=6;lay++)
346 for(lad=1;lad<=gm->GetNladders(lay);lad++)
347 for(det=1;det<=gm->GetNdetectors(lay);det++){
349 box = new TBRIK ("ActiveSSD","Active volume of SSD","SSD SI DET",
352 cout << "EXCEPTION in box = new TBRIK" << endl;
356 gm->GetTrans(lay,lad,det,xg[0],xg[1],xg[2]);
357 gm->GetRotMatrix(lay,lad,det,rt);
358 //sprintf(name,"ROT%1.1d2.2d2.2d",lay,lad,det);
359 for(i=0;i<9;i++) rtd[i] = rt[i];
361 rm = new TRotMatrix(name,name,rtd);
363 cout << "EXCEPTION in new TRotMatrix" << endl;
367 //sprintf(name,"ND%1.1d2.2d2.2d",lay,lad,det);
369 nd = new TNode("SSD"," ",box,xg[0],xg[1],xg[2],rm);
371 cout << "EXCEPTION in new TNode" << endl;
374 nd->SetLineColor(kColorITSSSD);
380 //_____________________________________________________________________________
381 void AliITSv5::CreateMaterials(){
382 ////////////////////////////////////////////////////////////////////////
383 // Read a file containing the materials for the ITS version 5.
384 ////////////////////////////////////////////////////////////////////////
387 filtmp = gSystem->ExpandPathName(fEuclidMaterial.Data());
389 FILE *file = fopen(filtmp,"r");
392 ReadEuclidMedia(filtmp);
394 Error("CreateMaterials"," THE MEDIA FILE %s DOES NOT EXIST !",filtmp);
398 //_____________________________________________________________________________
399 void AliITSv5::CreateGeometry(){
400 //////////////////////////////////////////////////////////////////////
401 // This is the geometry used for the ITS Pre-TDR and comes from an
402 // Euclid to Geant conversion. The only difference
403 // is in the details of the ITS supports. The detectors elements,
404 // detector numbering, and local and global reference frames are shown in
405 // the following figures.
408 <img src="picts/ITS/its1+2_convention_front_5.gif">
411 <font size=+2 color=red>
412 <p>This shows the front view of the SPDs.
415 <img src="picts/ITS/its1+2_convention_side_5.gif">
418 <font size=+2 color=red>
419 <p>This shows the perspective view of the SPDs.
421 <img src="picts/ITS/its1+2_tree.gif">
424 <font size=+2 color=red>
425 <p>This shows the geometry Tree for the SPDs.
430 <img src="picts/ITS/its3+4_convention_front_5.gif">
433 <font size=+2 color=red>
434 <p>This shows the front view of the SDDs.
437 <img src="picts/ITS/its3+4_convention_side_5.gif">
440 <font size=+2 color=red>
441 <p>This shows the perspective view of the SDDs.
443 <img src="picts/ITS/its3+4_tree.gif">
446 <font size=+2 color=red>
447 <p>This shows the geometry Tree for the SDDs.
452 <img src="picts/ITS/its5+6_convention_front_5.gif">
455 <font size=+2 color=red>
456 <p>This shows the front view of the SSDs.
459 <img src="picts/ITS/its5+6_convention_side_5.gif">
462 <font size=+2 color=red>
463 <p>This shows the perspective view of the SSDs.
466 <img src="picts/ITS/its5+6_tree.gif">
469 <font size=+2 color=red>
470 <p>This shows the geometry Tree for the SSDs.
475 <img src="picts/ITS/its_layer1-6_2.gif">
478 <font size=+2 color=red>
479 <p>This shows the front view of the whole ITS..
483 <img src="picts/ITS/its_layer1-6_1.gif">
486 <font size=+2 color=red>
487 <p>This shows the perspective view of the whole ITS..
491 <img src="picts/ITS/its1-6_tree.gif">
494 <font size=+2 color=red>
495 <p>This shows the geometry Tree for the whole ITS.
502 // Here are shown the details of the ITS support cones and services.
503 // First is a GEANT tree showing the organization of all of the volumes
504 // that make up the ITS supports and services.
507 <img src="picts/ITS/supports_tree.gif">
510 // What follows are a number of figures showing what these support
511 // structures look like.
515 <img src="picts/ITS/supports_3.gif">
518 <font size=+2 color=red>
519 <p>This shows the geometry of the supports for the Drift and Strip layers only.
523 <img src="picts/ITS/supports_2.gif">
526 <font size=+2 color=red>
527 <p>This shows the geometry of the supports for the Drift and Strip layers in front cut out.
531 <img src="picts/ITS/supports_1.gif">
534 <font size=+2 color=red>
535 <p>This shows the geometry of the supports for the Drift and Strip layers in a back cut out..
539 <img src="picts/ITS/suppssd.gif">
542 <font size=+2 color=red>
543 <p>This shows the geometry for the Strip layers supports.
547 <img src="picts/ITS/suppsdd.gif">
550 <font size=+2 color=red>
551 <p>This shows the geometry for the Drift layers supports.
557 // Read a file containing the geometry for the ITS version 5.
558 ////////////////////////////////////////////////////////////////////////
564 filtmp = gSystem->ExpandPathName(fEuclidGeometry.Data());
565 FILE *file = fopen(filtmp,"r");
569 cout << "Ready to read Euclid geometry file" << endl;
570 ReadEuclid(fEuclidGeometry.Data(),topvol);
571 printf("Read in euclid geometries\n");
573 Error("CreateGeometry"," THE GEOM FILE %s DOES NOT EXIST !",
574 fEuclidGeometry.Data());
578 // Place the ITS ghost volume ITSV in its mother volume (ALIC) and make it
581 gMC->Gspos("ITSV",1,"ALIC",0,0,0,0,"ONLY");
583 // Outputs the geometry tree in the EUCLID/CAD format if requested to do so
586 gMC->WriteEuclid("ITSgeometry", "ITSV", 1, 5);
587 } // end if (fEuclidOut)
589 cout << "finished with euclid geometrys" << endl;
591 //______________________________________________________________________
592 void AliITSv5::ReadOldGeometry(const char *filename){
593 // read in the file containing the transformations for the active
594 // volumes for the ITS version 5. This is expected to be in a file
595 // ending in .det. This geometry is kept in the AliITSgeom class.
600 if(fITSgeom!=0) delete fITSgeom;
601 filtmp = gSystem->ExpandPathName(filename);
602 size = strlen(filtmp);
603 if(size>4 && fGeomDetIn){
604 filtmp[size-3] = 'd'; // change from .euc to .det
605 filtmp[size-2] = 'e';
606 filtmp[size-1] = 't';
607 file = fopen(filtmp,"r");
608 if(file){ // if file exists use it to fill AliITSgeom structure.
610 fITSgeom = new AliITSgeom(filtmp);
611 fITSgeom->DefineShapes(3); // if fShape isn't defined define it.
612 // Now define the detector types/shapes.
613 fITSgeom->ReSetShape(kSPD,new AliITSgeomSPD300());
614 fITSgeom->ReSetShape(kSDD,new AliITSgeomSDD300());
615 fITSgeom->ReSetShape(kSSD,new AliITSgeomSSD175());
618 // fill AliITSgeom structure from geant structure just filled above
623 //______________________________________________________________________
624 void AliITSv5::InitAliITSgeom(){
625 // Based on the geometry tree defined in Geant 3.21, this
626 // routine initilizes the Class AliITSgeom from the Geant 3.21 ITS geometry
628 if(!(dynamic_cast<TGeant3*>(gMC))) {
629 Error("InitAliITSgeom",
630 "Wrong Monte Carlo. InitAliITSgeom uses TGeant3 calls");
633 cout << "Reading Geometry transformation directly from Geant 3." << endl;
634 const Int_t nlayers = 6;
635 const Int_t ndeep = 7;
636 Int_t itsGeomTreeNames[nlayers][ndeep],lnam[20],lnum[20];
637 Int_t nlad[nlayers],ndet[nlayers];
639 Float_t par[20],att[20];
640 Int_t npar,natt,idshape,imat,imed;
641 AliITSGeant3Geometry *ig = new AliITSGeant3Geometry();
642 Int_t mod,lay,lad,det,i,j,k;
643 char *names[nlayers][ndeep] = {
644 {"ALIC","ITSV","ITSD","IT12","I132","I186","ITS1"}, // lay=1
645 {"ALIC","ITSV","ITSD","IT12","I132","I131","ITS2"}, // lay=2
646 {"ALIC","ITSV","ITSD","IT34","I004","I302","ITS3"}, // lay=3
647 {"ALIC","ITSV","ITSD","IT34","I005","I402","ITS4"}, // lay=4
648 {"ALIC","ITSV","ITSD","IT56","I565","I562","ITS5"}, // lay=5
649 {"ALIC","ITSV","ITSD","IT56","I569","I566","ITS6"}};// lay=6
650 Int_t itsGeomTreeCopys[nlayers][ndeep] = {{1,1,1,1,10, 2,4}, // lay=1
651 {1,1,1,1,10, 4,4}, // lay=2
652 {1,1,1,1,14, 6,1}, // lay=3
653 {1,1,1,1,22, 8,1}, // lay=4
654 {1,1,1,1,34,23,1}, // lay=5
655 {1,1,1,1,38,26,1}};// lay=6
657 // Sorry, but this is not very pritty code. It should be replaced
658 // at some point with a version that can search through the geometry
660 for(i=0;i<20;i++) lnam[i] = lnum[i] = 0;
661 for(i=0;i<nlayers;i++)for(j=0;j<ndeep;j++)
662 itsGeomTreeNames[i][j] = ig->StringToInt(names[i][j]);
664 for(i=0;i<nlayers;i++){
666 for(j=0;j<ndeep;j++) if(itsGeomTreeCopys[i][j]!=0)
667 k *= TMath::Abs(itsGeomTreeCopys[i][j]);
671 if(fITSgeom!=0) delete fITSgeom;
672 nlad[0]=20;nlad[1]=40;nlad[2]=14;nlad[3]=22;nlad[4]=34;nlad[5]=38;
673 ndet[0]=4;ndet[1]=4;ndet[2]=6;ndet[3]=8;ndet[4]=22;ndet[5]=25;
674 fITSgeom = new AliITSgeom(0,6,nlad,ndet,mod);
676 for(lay=1;lay<=nlayers;lay++){
677 for(j=0;j<ndeep;j++) lnam[j] = itsGeomTreeNames[lay-1][j];
678 for(j=0;j<ndeep;j++) lnum[j] = itsGeomTreeCopys[lay-1][j];
680 case 1: case 2: // layers 1 and 2 are a bit special
682 for(j=1;j<=itsGeomTreeCopys[lay-1][4];j++){
684 for(k=1;k<=itsGeomTreeCopys[lay-1][5];k++){
687 for(det=1;det<=itsGeomTreeCopys[lay-1][6];det++){
690 ig->GetGeometry(ndeep,lnam,lnum,t,r,idshape,npar,natt,
692 fITSgeom->CreatMatrix(mod,lay,lad,det,kSPD,t,r);
693 if(!(fITSgeom->IsShapeDefined((Int_t)kSPD)))
694 fITSgeom->ReSetShape(kSPD,
695 new AliITSgeomSPD300());
700 case 3: case 4: case 5: case 6: // layers 3-6
702 for(lad=1;lad<=itsGeomTreeCopys[lay-1][4];lad++){
704 for(det=1;det<=itsGeomTreeCopys[lay-1][5];det++){
707 ig->GetGeometry(7,lnam,lnum,t,r,idshape,npar,natt,
711 fITSgeom->CreatMatrix(mod,lay,lad,det,kSDD,t,r);
712 if(!(fITSgeom->IsShapeDefined(kSDD)))
713 fITSgeom->ReSetShape(kSDD,new AliITSgeomSDD300());
716 fITSgeom->CreatMatrix(mod,lay,lad,det,kSSD,t,r);
717 if(!(fITSgeom->IsShapeDefined(kSSD)))
718 fITSgeom->ReSetShape(kSSD,new AliITSgeomSSD175());
728 //_____________________________________________________________________________
729 void AliITSv5::Init(){
730 ////////////////////////////////////////////////////////////////////////
731 // Initialise the ITS after it has been created.
732 ////////////////////////////////////////////////////////////////////////
737 for(i=0;i<30;i++) cout << "*";cout << " ITSv5_Init ";
738 for(i=0;i<30;i++) cout << "*";cout << endl;
740 if(fITSgeom==0) bg = kTRUE;
741 if(fRead[0]=='\0') strncpy(fRead,fEuclidGeomDet,60);
742 if(fWrite[0]=='\0') strncpy(fWrite,fEuclidGeomDet,60);
743 if(fGeomDetIn && !fGeomOldDetIn){
744 if(fITSgeom!=0) delete fITSgeom;
745 fITSgeom = new AliITSgeom();
746 fITSgeom->ReadNewFile(fRead);
748 if(fGeomDetIn && fGeomOldDetIn) ReadOldGeometry(fEuclidGeometry.Data());
750 if(!fGeomDetIn) this->InitAliITSgeom();
751 if(fGeomDetOut) fITSgeom->WriteNewFile(fWrite);
752 if(bg) BuildGeometry(); // call BuildGeometry here if fITSgeom was not
756 for(i=0;i<72;i++) cout << "*";
759 //_____________________________________________________________________________
760 void AliITSv5::StepManager(){
761 ////////////////////////////////////////////////////////////////////////
762 // Called for every step in the ITS, then calles the AliITShit class
763 // creator with the information to be recoreded about that hit.
764 // The value of the macro ALIITSPRINTGEOM if set to 1 will allow the
765 // printing of information to a file which can be used to create a .det
766 // file read in by the routine CreateGeometry(). If set to 0 or any other
767 // value except 1, the default behavior, then no such file is created nor
768 // it the extra variables and the like used in the printing allocated.
769 ////////////////////////////////////////////////////////////////////////
774 TLorentzVector position, momentum;
775 TClonesArray &lhits = *fHits;
779 if(gMC->IsTrackInside()) vol[3] += 1;
780 if(gMC->IsTrackEntering()) vol[3] += 2;
781 if(gMC->IsTrackExiting()) vol[3] += 4;
782 if(gMC->IsTrackOut()) vol[3] += 8;
783 if(gMC->IsTrackDisappeared()) vol[3] += 16;
784 if(gMC->IsTrackStop()) vol[3] += 32;
785 if(gMC->IsTrackAlive()) vol[3] += 64;
787 // Fill hit structure.
788 if(!(gMC->TrackCharge())) return;
790 // Only entering charged tracks
791 if((id = gMC->CurrentVolID(copy)) == fIdSens[0]) {
793 id = gMC->CurrentVolOffID(0,copy);
794 //detector copy in the ladder = 1<->4 (ITS1)
796 gMC->CurrentVolOffID(1,copy1);
797 //ladder copy in the module = 1<->2 (I186)
798 gMC->CurrentVolOffID(2,copy2);
799 //module copy in the layer = 1<->10 (I132)
800 vol[2] = copy1+(copy2-1)*2;//# of ladders in one module = 2
801 } else if(id == fIdSens[1]){
803 id = gMC->CurrentVolOffID(0,copy);
804 //detector copy in the ladder = 1<->4 (ITS2)
806 gMC->CurrentVolOffID(1,copy1);
807 //ladder copy in the module = 1<->4 (I131)
808 gMC->CurrentVolOffID(2,copy2);
809 //module copy in the layer = 1<->10 (I132)
810 vol[2] = copy1+(copy2-1)*4;//# of ladders in one module = 4
811 } else if(id == fIdSens[2]){
813 id = gMC->CurrentVolOffID(1,copy);
814 //detector copy in the ladder = 1<->5 (ITS3 is inside I314)
816 id = gMC->CurrentVolOffID(2,copy);
817 //ladder copy in the layer = 1<->12 (I316)
819 } else if(id == fIdSens[3]){
821 id = gMC->CurrentVolOffID(1,copy);
822 //detector copy in the ladder = 1<->8 (ITS4 is inside I414)
824 id = gMC->CurrentVolOffID(2,copy);
825 //ladder copy in the layer = 1<->22 (I417)
827 }else if(id == fIdSens[4]){
829 id = gMC->CurrentVolOffID(1,copy);
830 //detector copy in the ladder = 1<->23 (ITS5 is inside I562)
832 id = gMC->CurrentVolOffID(2,copy);
833 //ladder copy in the layer = 1<->34 (I565)
835 }else if(id == fIdSens[5]){
837 id = gMC->CurrentVolOffID(1,copy);
838 //detector copy in the ladder = 1<->26 (ITS6 is inside I566)
840 id = gMC->CurrentVolOffID(2,copy);
841 //ladder copy in the layer = 1<->38 (I569)
844 return; // not an ITS volume?
845 } // end if/else if (gMC->CurentVolID(copy) == fIdSens[i])
847 gMC->TrackPosition(position);
848 gMC->TrackMomentum(momentum);
856 hits[7]=gMC->TrackTime();
857 // Fill hit structure with this new hit.
858 new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->CurrentTrack(),vol,hits);