o small fix
[u/mrichter/AliRoot.git] / TRD / AliTRDtrackletWord.cxx
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
16 /* $Id: AliTRDtrackletWord.cxx 28397 2008-09-02 09:33:00Z cblume $ */
17
18 ////////////////////////////////////////////////////////////////////////////
19 //                                                                        //
20 //  A tracklet word as from FEE                                           //
21 //                                                                        //
22 //  Author: J. Klein (Jochen.Klein@cern.ch)                               //
23 //                                                                        //
24 ////////////////////////////////////////////////////////////////////////////
25
26 #include "AliTRDtrackletWord.h"
27 #include "AliTRDgeometry.h"
28 #include "AliTRDpadPlane.h"
29 #include "AliLog.h"
30
31 ClassImp(AliTRDtrackletWord)
32
33 AliTRDgeometry* AliTRDtrackletWord::fgGeo = 0x0;
34
35 AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord) :
36   AliTRDtrackletBase(),
37   fHCId(-1),
38   fTrackletWord(trackletWord)
39 {
40   if (!fgGeo)
41     fgGeo = new AliTRDgeometry;
42 }
43
44 AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord, Int_t hcid) :
45   AliTRDtrackletBase(),
46   fHCId(hcid),
47   fTrackletWord(trackletWord)
48 {
49   if (!fgGeo)
50     fgGeo = new AliTRDgeometry;
51 }
52
53 AliTRDtrackletWord::AliTRDtrackletWord(const AliTRDtrackletWord &rhs) :
54   AliTRDtrackletBase(rhs),
55   fHCId(rhs.fHCId),
56   fTrackletWord(rhs.fTrackletWord)
57 {
58
59   if (!fgGeo)
60     fgGeo = new AliTRDgeometry;
61 }
62
63 AliTRDtrackletWord::~AliTRDtrackletWord()
64 {
65
66 }
67
68 Int_t AliTRDtrackletWord::GetYbin() const {
69   // returns (signed) value of Y
70   if (fTrackletWord & 0x1000) {
71     return -((~(fTrackletWord-1)) & 0x1fff);
72   }
73   else {
74     return (fTrackletWord & 0x1fff);
75   }
76 }
77
78 Int_t AliTRDtrackletWord::GetdY() const
79 {
80   // returns (signed) value of the deflection length
81   if (fTrackletWord & (1 << 19)) {
82     return -((~((fTrackletWord >> 13) - 1)) & 0x7f);
83   }
84   else {
85     return ((fTrackletWord >> 13) & 0x7f);
86   }
87 }
88
89 Int_t AliTRDtrackletWord::GetROB() const
90 {
91   return 2 * (GetZbin() / 4) + (GetY() > 0 ? 1 : 0);
92 }
93
94 Int_t AliTRDtrackletWord::GetMCM() const
95 {
96   AliTRDpadPlane *pp = fgGeo->GetPadPlane(GetDetector());
97   return (((Int_t) ((GetY()) / pp->GetWidthIPad()) + 72) / 18) % 4
98     + 4 * (GetZbin() % 4);
99 }
100