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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 | ///////////////////////////////////////////////////////////////////////// | |
33 | ClassImp(AliITSVertexerFast) | |
34 | ||
35 | ||
36 | ||
37 | //______________________________________________________________________ | |
8221b41b | 38 | AliITSVertexerFast::AliITSVertexerFast():AliITSVertexer(), |
39 | fSmear(0) | |
40 | { | |
92e7a7bb | 41 | // Default Constructor |
42 | fSmear = 0; | |
60b9526b | 43 | AliRunLoader *rl =AliRunLoader::GetRunLoader(); |
44 | TTree *trK=(TTree*)rl->TreeK(); | |
45 | if(!trK)AliFatal("This class should be used only with simulated events!!"); | |
46 | rl->LoadHeader(); | |
92e7a7bb | 47 | } |
48 | ||
49 | //______________________________________________________________________ | |
8221b41b | 50 | AliITSVertexerFast::AliITSVertexerFast(Double_t *smear):AliITSVertexer(), |
51 | fSmear(0) | |
52 | { | |
92e7a7bb | 53 | // Standard constructor |
54 | fSmear = new Double_t[3]; | |
55 | for(Int_t i=0;i<3;i++)fSmear[i]=smear[i]; | |
2257f27e | 56 | Info("AliITSVertexerFast","Gaussian smaring of the generated vertex. Parameters %f12.5 , %f12.5 , %f12.5 \n",fSmear[0],fSmear[1],fSmear[2]); |
60b9526b | 57 | AliRunLoader *rl =AliRunLoader::GetRunLoader(); |
58 | TTree *trK=(TTree*)rl->TreeK(); | |
59 | if(!trK)AliFatal("This class should be used only with simulated events!!"); | |
60 | rl->LoadHeader(); | |
61 | ||
92e7a7bb | 62 | } |
63 | ||
60b9526b | 64 | |
92e7a7bb | 65 | //______________________________________________________________________ |
66 | AliITSVertexerFast::~AliITSVertexerFast(){ | |
67 | // Destructor | |
68 | if(fSmear)delete [] fSmear; | |
69 | fSmear = 0; | |
70 | } | |
71 | ||
72 | //______________________________________________________________________ | |
d681bb2d | 73 | AliESDVertex* AliITSVertexerFast::FindVertexForCurrentEvent(Int_t evnumb){ |
92e7a7bb | 74 | // Defines the AliITSVertex for the current event |
75 | fCurrentVertex = 0; | |
76 | AliRunLoader *rl =AliRunLoader::GetRunLoader(); | |
77 | rl->GetEvent(evnumb); | |
78 | TArrayF primaryVertex(3); // true vertex | |
60b9526b | 79 | AliHeader* header = rl->GetAliRun()->GetHeader(); |
92e7a7bb | 80 | AliGenEventHeader* genEventHeader = header->GenEventHeader(); |
81 | genEventHeader->PrimaryVertex(primaryVertex); | |
60b9526b | 82 | |
92e7a7bb | 83 | // Smearing |
84 | Double_t vrttrue[3],vrtx[3]; | |
85 | for(Int_t k=0; k<3;k++){ | |
86 | vrttrue[k] = static_cast<Double_t>(primaryVertex[k]); | |
87 | vrtx[k] = gRandom->Gaus(vrttrue[k],fSmear[k]); | |
88 | } | |
89 | char name[30]; | |
90 | sprintf(name,"Vertex_%d",evnumb); | |
d681bb2d | 91 | fCurrentVertex = new AliESDVertex(vrtx,fSmear,name); |
92e7a7bb | 92 | return fCurrentVertex; |
60b9526b | 93 | |
92e7a7bb | 94 | } |
95 | ||
96 | //______________________________________________________________________ | |
97 | void AliITSVertexerFast::FindVertices(){ | |
98 | // computes the vertices of the events in the range FirstEvent - LastEvent | |
99 | ||
100 | AliRunLoader *rl = AliRunLoader::GetRunLoader(); | |
101 | AliITSLoader* iTSloader = (AliITSLoader*) rl->GetLoader("ITSLoader"); | |
102 | iTSloader->ReloadRecPoints(); | |
103 | for(Int_t i=fFirstEvent;i<=fLastEvent;i++){ | |
104 | rl->GetEvent(i); | |
105 | FindVertexForCurrentEvent(i); | |
106 | if(fCurrentVertex) WriteCurrentVertex(); | |
107 | else { | |
108 | cout<<"Vertex not found for event "<<i<<endl; | |
109 | ||
110 | } | |
111 | ||
112 | } | |
113 | ||
114 | } | |
115 | ||
116 | //________________________________________________________ | |
117 | void AliITSVertexerFast::PrintStatus() const { | |
118 | // Print current status | |
119 | cout <<"=======================================================\n"; | |
120 | ||
121 | cout<<"First event to be processed "<<fFirstEvent; | |
122 | cout<<"\n Last event to be processed "<<fLastEvent<<endl; | |
123 | cout<<"RMS for gaussian smearing: "; | |
124 | for(Int_t k=0;k<3;k++)cout<<" "<<fSmear[k]; | |
125 | cout<<endl; | |
126 | } | |
127 | ||
128 | //______________________________________________________________________ | |
129 | AliITSVertexerFast::AliITSVertexerFast(const AliITSVertexerFast &vtxr) : | |
130 | AliITSVertexer(vtxr) { | |
131 | // Copy constructor | |
132 | // Copies are not allowed. The method is protected to avoid misuse. | |
133 | Error("AliITSVertexerFast","Copy constructor not allowed\n"); | |
134 | } | |
135 | ||
136 | //______________________________________________________________________ | |
137 | AliITSVertexerFast& AliITSVertexerFast::operator=(const | |
138 | AliITSVertexerFast& /* vtxr */){ | |
139 | // Assignment operator | |
140 | // Assignment is not allowed. The method is protected to avoid misuse. | |
141 | Error("= operator","Assignment operator not allowed\n"); | |
142 | return *this; | |
143 | } |