Coding rule violations corrected.
[u/mrichter/AliRoot.git] / ITS / AliITSVertexerFast.cxx
CommitLineData
92e7a7bb 1/**************************************************************************
2 * Copyright(c) 1998-2003, 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#include <Riostream.h>
16#include <TArrayF.h>
17#include <TRandom.h>
d681bb2d 18#include "AliESDVertex.h"
92e7a7bb 19#include <AliITSVertexerFast.h>
20#include "AliHeader.h"
21#include "AliGenEventHeader.h"
22#include "AliRun.h"
23#include "AliITSLoader.h"
24#include "AliRunLoader.h"
25
26/////////////////////////////////////////////////////////////////////////
27// //
28// Fast vertexer - True (i.e. generated) vertex coordinates //
29// are smeared with gaussians of given width //
30// Origin: masera@to.infn.it 25/09/2003 //
31// //
32/////////////////////////////////////////////////////////////////////////
33ClassImp(AliITSVertexerFast)
34
35
36
37//______________________________________________________________________
38AliITSVertexerFast::AliITSVertexerFast():AliITSVertexer() {
39 // Default Constructor
40 fSmear = 0;
41}
42
43//______________________________________________________________________
44AliITSVertexerFast::AliITSVertexerFast(Double_t *smear):AliITSVertexer() {
45 // Standard constructor
46 fSmear = new Double_t[3];
47 for(Int_t i=0;i<3;i++)fSmear[i]=smear[i];
2257f27e 48 Info("AliITSVertexerFast","Gaussian smaring of the generated vertex. Parameters %f12.5 , %f12.5 , %f12.5 \n",fSmear[0],fSmear[1],fSmear[2]);
92e7a7bb 49}
50
51//______________________________________________________________________
52AliITSVertexerFast::~AliITSVertexerFast(){
53 // Destructor
54 if(fSmear)delete [] fSmear;
55 fSmear = 0;
56}
57
58//______________________________________________________________________
d681bb2d 59AliESDVertex* AliITSVertexerFast::FindVertexForCurrentEvent(Int_t evnumb){
92e7a7bb 60 // Defines the AliITSVertex for the current event
61 fCurrentVertex = 0;
62 AliRunLoader *rl =AliRunLoader::GetRunLoader();
63 rl->GetEvent(evnumb);
64 TArrayF primaryVertex(3); // true vertex
65 AliHeader* header = gAlice->GetHeader();
66 AliGenEventHeader* genEventHeader = header->GenEventHeader();
67 genEventHeader->PrimaryVertex(primaryVertex);
68
69 // Smearing
70 Double_t vrttrue[3],vrtx[3];
71 for(Int_t k=0; k<3;k++){
72 vrttrue[k] = static_cast<Double_t>(primaryVertex[k]);
73 vrtx[k] = gRandom->Gaus(vrttrue[k],fSmear[k]);
74 }
75 char name[30];
76 sprintf(name,"Vertex_%d",evnumb);
d681bb2d 77 fCurrentVertex = new AliESDVertex(vrtx,fSmear,name);
92e7a7bb 78 fCurrentVertex->SetTruePos(vrttrue);
79 return fCurrentVertex;
80}
81
82//______________________________________________________________________
83void AliITSVertexerFast::FindVertices(){
84 // computes the vertices of the events in the range FirstEvent - LastEvent
85
86 AliRunLoader *rl = AliRunLoader::GetRunLoader();
87 AliITSLoader* iTSloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
88 iTSloader->ReloadRecPoints();
89 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
90 rl->GetEvent(i);
91 FindVertexForCurrentEvent(i);
92 if(fCurrentVertex) WriteCurrentVertex();
93 else {
94 cout<<"Vertex not found for event "<<i<<endl;
95
96 }
97
98 }
99
100}
101
102//________________________________________________________
103void AliITSVertexerFast::PrintStatus() const {
104 // Print current status
105 cout <<"=======================================================\n";
106
107 cout<<"First event to be processed "<<fFirstEvent;
108 cout<<"\n Last event to be processed "<<fLastEvent<<endl;
109 cout<<"RMS for gaussian smearing: ";
110 for(Int_t k=0;k<3;k++)cout<<" "<<fSmear[k];
111 cout<<endl;
112}
113
114//______________________________________________________________________
115AliITSVertexerFast::AliITSVertexerFast(const AliITSVertexerFast &vtxr) :
116 AliITSVertexer(vtxr) {
117 // Copy constructor
118 // Copies are not allowed. The method is protected to avoid misuse.
119 Error("AliITSVertexerFast","Copy constructor not allowed\n");
120}
121
122//______________________________________________________________________
123AliITSVertexerFast& AliITSVertexerFast::operator=(const
124 AliITSVertexerFast& /* vtxr */){
125 // Assignment operator
126 // Assignment is not allowed. The method is protected to avoid misuse.
127 Error("= operator","Assignment operator not allowed\n");
128 return *this;
129}