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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 = new AliTRDgeometry;
34
35 AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord) :
36   AliTRDtrackletBase(),
37   fHCId(-1),
38   fTrackletWord(trackletWord)
39
40
41 }
42
43 AliTRDtrackletWord::AliTRDtrackletWord(UInt_t trackletWord, Int_t hcid) :
44   AliTRDtrackletBase(),
45   fHCId(hcid),
46   fTrackletWord(trackletWord)
47
48
49 }
50
51 AliTRDtrackletWord::AliTRDtrackletWord(const AliTRDtrackletWord &rhs) :
52   AliTRDtrackletBase(rhs),
53   fHCId(rhs.fHCId),
54   fTrackletWord(rhs.fTrackletWord)
55 {
56
57 }
58
59 AliTRDtrackletWord::~AliTRDtrackletWord() 
60 {
61
62 }
63
64 Int_t AliTRDtrackletWord::GetYbin() const {
65   // returns (signed) value of Y
66   if (fTrackletWord & 0x1000) {
67     return -((~(fTrackletWord-1)) & 0x1fff);
68   }
69   else {
70     return (fTrackletWord & 0x1fff);
71   }
72 }
73
74 Int_t AliTRDtrackletWord::GetdY() const 
75 {
76   // returns (signed) value of the deflection length
77   if (fTrackletWord & (1 << 19)) {
78     return -((~((fTrackletWord >> 13) - 1)) & 0x7f);
79   }
80   else {
81     return ((fTrackletWord >> 13) & 0x7f);
82   }
83 }
84
85 Int_t AliTRDtrackletWord::GetROB() const
86 {
87   return 2 * (GetZbin() / 4) + (GetY() > 0 ? 1 : 0);
88 }
89
90 Int_t AliTRDtrackletWord::GetMCM() const
91 {
92   AliTRDpadPlane *pp = fgGeo->GetPadPlane(GetDetector());
93   return (((Int_t) ((GetY()) / pp->GetWidthIPad()) + 72) / 18) % 4
94     + 4 * (GetZbin() % 4);
95 }
96