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 1.18 2000/11/30 17:38:08 cblume
19 Changes to get in line with new STEER and EVGEN
21 Revision 1.17 2000/11/01 14:53:21 cblume
22 Merge with TRD-develop
24 Revision 1.14.2.3 2000/10/06 16:49:46 cblume
27 Revision 1.14.2.2 2000/10/04 16:34:58 cblume
28 Replace include files by forward declarations
30 Revision 1.14.2.1 2000/09/18 13:48:18 cblume
31 Adapt to new AliTRDhit
33 Revision 1.16 2000/06/08 18:32:58 cblume
34 Make code compliant to coding conventions
36 Revision 1.15 2000/06/07 16:25:37 cblume
37 Try to remove compiler warnings on Sun and HP
39 Revision 1.14 2000/02/28 19:10:26 cblume
40 Include the new TRD classes
42 Revision 1.13.4.1 2000/02/28 18:01:53 cblume
43 Change to new hit version and introduce geometry class
45 Revision 1.13 1999/11/05 22:50:28 fca
46 Do not use Atan, removed from ROOT too
48 Revision 1.12 1999/11/02 16:35:56 fca
49 New version of TRD introduced
51 Revision 1.11 1999/11/01 20:41:51 fca
52 Added protections against using the wrong version of FRAME
54 Revision 1.10 1999/09/29 09:24:35 fca
55 Introduction of the Copyright and cvs Log
59 ///////////////////////////////////////////////////////////////////////////////
61 // Transition Radiation Detector version 0 -- fast simulator //
65 <img src="picts/AliTRDfullClass.gif">
70 ///////////////////////////////////////////////////////////////////////////////
77 #include <TLorentzVector.h>
84 #include "AliTRDhit.h"
85 #include "AliTRDgeometry.h"
89 //_____________________________________________________________________________
90 AliTRDv0::AliTRDv0():AliTRD()
93 // AliTRDv0 default constructor
100 //_____________________________________________________________________________
101 AliTRDv0::AliTRDv0(const char *name, const char *title)
105 // Standard constructor for Transition Radiation Detector version 0
112 //_____________________________________________________________________________
113 AliTRDv0::~AliTRDv0()
116 // AliTRDv0 destructor
121 //_____________________________________________________________________________
122 void AliTRDv0::CreateGeometry()
125 // Create the GEANT geometry for the Transition Radiation Detector - Version 0
126 // This version covers the full azimuth.
129 // Check that FRAME is there otherwise we have no place where to put the TRD
130 AliModule* frame = gAlice->GetModule("FRAME");
133 // Define the chambers
134 AliTRD::CreateGeometry();
138 //_____________________________________________________________________________
139 void AliTRDv0::CreateMaterials()
142 // Create materials for the Transition Radiation Detector
145 AliTRD::CreateMaterials();
149 //_____________________________________________________________________________
150 void AliTRDv0::Init()
153 // Initialize Transition Radiation Detector after geometry is built
158 printf(" Fast simulator\n\n");
159 for (Int_t i = 0; i < 80; i++) printf("*");
164 //_____________________________________________________________________________
165 void AliTRDv0::StepManager()
168 // Procedure called at every step in the TRD
169 // Fast simulator. If switched on, a hit is produced when a track
170 // crosses the border between amplification region and pad plane.
182 // Use pad plane as sensitive volume
183 TString cIdSens = "L";
185 Char_t cIdChamber[2];
187 const Int_t kNplan = AliTRDgeometry::Nplan();
189 // Writing out hits enabled?
190 if (!(fHitsOn)) return;
192 // Use only charged tracks and count them only once per volume
193 if (gMC->TrackCharge() &&
194 gMC->IsTrackEntering()) {
196 // Check on sensitive volume
197 cIdCurrent = gMC->CurrentVolName();
198 if (cIdCurrent[1] == cIdSens) {
200 gMC->TrackPosition(p);
201 for (Int_t i = 0; i < 3; i++) hits[i] = p[i];
203 // The sector number (0 - 17)
204 // The numbering goes clockwise and starts at y = 0
205 Float_t phi = kRaddeg*TMath::ATan2(hits[0],hits[1]);
210 sec = ((Int_t) (phi / 20));
212 // The plane and chamber number
213 cIdChamber[0] = cIdCurrent[2];
214 cIdChamber[1] = cIdCurrent[3];
215 Int_t idChamber = atoi(cIdChamber);
216 cha = ((Int_t) idChamber / kNplan);
217 pla = ((Int_t) idChamber % kNplan);
218 det = fGeometry->GetDetector(pla,cha,sec);
220 AddHit(gAlice->CurrentTrack(),det,hits,0,kTRUE);