1 /**************************************************************************
2 * Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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>
18 #include "AliESDVertex.h"
19 #include <AliITSVertexerFast.h>
20 #include "AliHeader.h"
21 #include "AliGenEventHeader.h"
23 #include "AliITSLoader.h"
24 #include "AliRunLoader.h"
26 /////////////////////////////////////////////////////////////////////////
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 //
32 /////////////////////////////////////////////////////////////////////////
33 ClassImp(AliITSVertexerFast)
37 //______________________________________________________________________
38 AliITSVertexerFast::AliITSVertexerFast():AliITSVertexer() {
39 // Default Constructor
43 //______________________________________________________________________
44 AliITSVertexerFast::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];
48 Info("AliITSVertexerFast","Gaussian smaring of the generated vertex. Parameters %f12.5 , %f12.5 , %f12.5 \n",fSmear[0],fSmear[1],fSmear[2]);
51 //______________________________________________________________________
52 AliITSVertexerFast::~AliITSVertexerFast(){
54 if(fSmear)delete [] fSmear;
58 //______________________________________________________________________
59 AliESDVertex* AliITSVertexerFast::FindVertexForCurrentEvent(Int_t evnumb){
60 // Defines the AliITSVertex for the current event
62 AliRunLoader *rl =AliRunLoader::GetRunLoader();
64 TArrayF primaryVertex(3); // true vertex
65 AliHeader* header = gAlice->GetHeader();
66 AliGenEventHeader* genEventHeader = header->GenEventHeader();
67 genEventHeader->PrimaryVertex(primaryVertex);
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]);
76 sprintf(name,"Vertex_%d",evnumb);
77 fCurrentVertex = new AliESDVertex(vrtx,fSmear,name);
78 fCurrentVertex->SetTruePos(vrttrue);
79 return fCurrentVertex;
82 //______________________________________________________________________
83 void AliITSVertexerFast::FindVertices(){
84 // computes the vertices of the events in the range FirstEvent - LastEvent
86 AliRunLoader *rl = AliRunLoader::GetRunLoader();
87 AliITSLoader* iTSloader = (AliITSLoader*) rl->GetLoader("ITSLoader");
88 iTSloader->ReloadRecPoints();
89 for(Int_t i=fFirstEvent;i<=fLastEvent;i++){
91 FindVertexForCurrentEvent(i);
92 if(fCurrentVertex) WriteCurrentVertex();
94 cout<<"Vertex not found for event "<<i<<endl;
102 //________________________________________________________
103 void AliITSVertexerFast::PrintStatus() const {
104 // Print current status
105 cout <<"=======================================================\n";
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];
114 //______________________________________________________________________
115 AliITSVertexerFast::AliITSVertexerFast(const AliITSVertexerFast &vtxr) :
116 AliITSVertexer(vtxr) {
118 // Copies are not allowed. The method is protected to avoid misuse.
119 Error("AliITSVertexerFast","Copy constructor not allowed\n");
122 //______________________________________________________________________
123 AliITSVertexerFast& 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");