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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 | /* $Id$ */ | |
17 | ||
18 | #include <Riostream.h> | |
19 | ||
20 | #include <TDirectory.h> | |
21 | ||
22 | #include <AliRunLoader.h> | |
23 | #include "AliSTARTLoader.h" | |
24 | #include "AliSTARTdigit.h" | |
25 | #include "AliSTARTReconstructor.h" | |
26 | #include <AliESD.h> | |
27 | ||
28 | ClassImp(AliSTARTReconstructor) | |
29 | ||
30 | void AliSTARTReconstructor::Reconstruct(AliRunLoader* /*rl*/) const | |
31 | { | |
32 | // nothing to be done | |
33 | ||
34 | } | |
35 | ||
36 | void AliSTARTReconstructor::FillESD(AliRunLoader* rl, AliESD *pESD) const | |
37 | { | |
38 | /*************************************************** | |
39 | Resonstruct digits to vertex position | |
40 | ****************************************************/ | |
41 | ||
42 | Int_t timediff; | |
43 | Float_t timePs; | |
44 | ||
45 | if (!rl) { | |
46 | Error("Reconstruct", "No run loader"); | |
47 | return; | |
48 | } | |
49 | ||
50 | if (rl->GetDebug()>1) Info("Reconstruct","START!!!"); | |
51 | ||
52 | AliSTARTLoader* pStartLoader = (AliSTARTLoader*) rl->GetLoader("STARTLoader"); | |
53 | ||
54 | pStartLoader->LoadDigits(); | |
55 | AliSTARTdigit* pDigits=pStartLoader->Digits(); | |
56 | if (!pDigits) { | |
57 | Error("Reconstruct", "no digits found"); | |
58 | return; | |
59 | } | |
60 | ||
61 | if (rl->GetDebug()>1) pDigits->Dump(); | |
62 | ||
63 | if(pDigits->GetTimeDiff()<TMath::Abs(1000)) { | |
64 | timediff=pDigits->GetTimeDiff(); //time in number of channels | |
65 | timePs=(512-timediff)*2.5; // time in Ps channel_width =10ps | |
66 | // Float_t c = 299792458/1.e9; //speed of light cm/ps | |
67 | Float_t c = 0.3; //speed of light mm/ps | |
68 | Float_t Zposit=timePs*c;// for 0 vertex | |
69 | ||
70 | if (rl->GetDebug()>1) { | |
71 | cout << "timediff " << timediff | |
72 | <<" timePs " << timePs | |
73 | <<" Zposit "<<Zposit<<endl; | |
74 | } | |
75 | ||
76 | pESD->SetT0zVertex(Zposit); | |
77 | ||
78 | if (rl->GetDebug()>1) { | |
79 | cout<<" vertex in ESD "<< pESD->GetT0zVertex()<<endl; | |
80 | } | |
81 | ||
82 | } // vertex in 3 sigma | |
83 | pStartLoader->UnloadDigits(); | |
84 | } | |
85 | ||
86 | ||
87 | ||
88 | ||
89 | ||
90 |