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[u/mrichter/AliRoot.git] / HMPID / AliHMPIDDigitizer.cxx
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d3da6dc4 1/**************************************************************************
2 * Copyright(c) 1998-2000, 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#include "AliHMPIDDigitizer.h"
17#include "AliHMPID.h"
18#include "AliHMPIDDigit.h"
19#include <AliRun.h>
20#include <AliRunLoader.h>
21#include "AliRunDigitizer.h"
22#include <AliLoader.h>
23#include <AliLog.h>
24
25
26ClassImp(AliHMPIDDigitizer)
27
28//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
29void AliHMPIDDigitizer::Exec(Option_t*)
30{
31// This methode is responsible for merging sdigits to a list of digits
32//Disintegration leeds to the fact that one hit affects several neighbouring pads, which means that the same pad might be affected by few hits.
33 AliDebug(1,Form("Start with %i input(s) for event %i",fManager->GetNinputs(),fManager->GetOutputEventNr()));
34//First we read all sdigits from all inputs
35 AliRunLoader *pInRunLoader=0;//in and out Run loaders
36 AliLoader *pInRichLoader=0;//in and out HMPID loaders
37 TClonesArray sdigs("AliHMPIDDigit");//tmp storage for sdigits sum up from all input files
38 Int_t total=0;
39 for(Int_t inFileN=0;inFileN<fManager->GetNinputs();inFileN++){//files loop
40 pInRunLoader = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inFileN)); //get run loader from current input
41 pInRichLoader = pInRunLoader->GetLoader("HMPIDLoader"); if(pInRichLoader==0) continue; //no HMPID in this input, check the next input
42 if (!pInRunLoader->GetAliRun()) pInRunLoader->LoadgAlice();
43 AliHMPID* pInRich=(AliHMPID*)pInRunLoader->GetAliRun()->GetDetector("HMPID"); //take HMPID from current input
44 pInRichLoader->LoadSDigits(); pInRichLoader->TreeS()->GetEntry(0); //take list of HMPID sdigits from current input
45 AliDebug(1,Form("input %i has %i sdigits",inFileN,pInRich->SdiLst()->GetEntries()));
46 for(Int_t i=0;i<pInRich->SdiLst()->GetEntries();i++){ //collect sdigits from current input
47 AliHMPIDDigit *pSDig=(AliHMPIDDigit*)pInRich->SdiLst()->At(i);
48 pSDig->AddTidOffset(fManager->GetMask(inFileN)); //apply TID shift since all inputs count tracks independently starting from 0
49 new(sdigs[total++]) AliHMPIDDigit(*pSDig);
50 }
51 pInRichLoader->UnloadSDigits(); pInRich->SdiReset(); //close current input and reset
52 }//files loop
53
54 //PH if(sdigs.GetEntries()==0) return; //no sdigits collected, nothing to convert
55
56 AliRunLoader *pOutRunLoader = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName()); //open output stream (only 1 possible)
57 AliLoader *pOutRichLoader = pOutRunLoader->GetLoader("HMPIDLoader"); //take output HMPID loader
58 AliHMPID *pOutRich = (AliHMPID*)pOutRunLoader->GetAliRun()->GetDetector("HMPID"); //take output HMPID
59 pOutRichLoader->MakeTree("D"); pOutRich->MakeBranch("D"); //create TreeD in output stream
60
61 Sdi2Dig(&sdigs,pOutRich->DigLst());
62
63 pOutRichLoader->TreeD()->Fill(); //fill the output tree with the list of digits
64 pOutRichLoader->WriteDigits("OVERWRITE"); //serialize them to file
65
66 sdigs.Clear(); //remove all tmp sdigits
67 pOutRichLoader->UnloadDigits(); pOutRich->DigReset();
68}//Exec()
69//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
70void AliHMPIDDigitizer::Sdi2Dig(TClonesArray *pSdiLst,TObjArray *pDigLst)
71{
72// Converts list of sdigits to 7 lists of digits, one per each chamber
73// Arguments: pSDigLst - list of all sdigits
74// pDigLst - list of 7 lists of digits
75// Returns: none
76
77 TClonesArray *pLst[7]; Int_t iCnt[7];
78
79 for(Int_t i=0;i<7;i++){
80 pLst[i]=(TClonesArray*)(*pDigLst)[i];
81 iCnt[i]=pLst[i]->GetEntries(); //in principle those lists should be empty
82 }
83
84 pSdiLst->Sort();
85
86 Int_t iPad=-1,iCh=-1,iNdigPad=-1,aTids[3]={-1,-1,-1}; Float_t q=-1;
87 for(Int_t i=0;i<pSdiLst->GetEntries();i++){ //sdigits loop (sorted)
88 AliHMPIDDigit *pSdig=(AliHMPIDDigit*)pSdiLst->At(i); //take current sdigit
89 if(pSdig->Pad()==iPad){ //if the same pad
90 q+=pSdig->Q(); //sum up charge
91 iNdigPad++; if(iNdigPad<=3) aTids[iNdigPad-1]=pSdig->GetTrack(0); //collect TID
92 continue;
93 }
94 if(i!=0 && AliHMPIDDigit::IsOverTh(q)) new((*pLst[iCh])[iCnt[iCh]++]) AliHMPIDDigit(iPad,(Int_t)q,aTids); //do not create digit for the very first sdigit
95 iPad=pSdig->Pad(); iCh=AliHMPIDDigit::A2C(iPad); //new sdigit comes, reset collectors
96 iNdigPad=1;
97 aTids[0]=pSdig->GetTrack(0);aTids[1]=aTids[2]=-1;
98 q=pSdig->Q();
99 }//sdigits loop (sorted)
100
101 if(AliHMPIDDigit::IsOverTh(q)) new((*pLst[iCh])[iCnt[iCh]++]) AliHMPIDDigit(iPad,(Int_t)q,aTids); //add the last one, in case of empty sdigits list q=-1
102 //so digit is not created
103}//Sdi2Dig()
104//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++