1 | // $Id: OpticsResponseBuilder.cc 3005 2012-01-06 08:06:11Z fenu $ |
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2 | // Author: ale 2005/01/19 |
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3 | |
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4 | /***************************************************************************** |
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5 | * ESAF: Euso Simulation and Analysis Framework * |
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6 | * * |
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7 | * Id: OpticsResponseBuilder * |
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8 | * Package: <packagename> * |
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9 | * Coordinator: <coordinator> * |
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10 | * * |
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11 | *****************************************************************************/ |
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12 | |
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13 | //_____________________________________________________________________________ |
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14 | // |
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15 | // OpticsResponseBuilder |
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16 | // |
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17 | // <extensive class description> |
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18 | // |
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19 | // Config file parameters |
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20 | // ====================== |
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21 | // |
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22 | // <parameter name>: <parameter description> |
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23 | // -Valid options: <available options> |
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24 | // |
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25 | |
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26 | #include "OpticsResponseBuilder.hh" |
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27 | #include "ParentPhoton.hh" |
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28 | #include "Photon.hh" |
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29 | #include "EORSample.hh" |
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30 | #include "EORHeader.hh" |
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31 | #include "EsafRandom.hh" |
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32 | #include "OpticalSystem.hh" |
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33 | #include "IdealFocalSurface.hh" |
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34 | |
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35 | #include <TFile.h> |
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36 | #include <TStyle.h> |
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37 | #include <TH1.h> |
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38 | #include <TH2F.h> |
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39 | #include <TH3F.h> |
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40 | #include <TVector3.h> |
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41 | #include <TGraph.h> |
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42 | #include <TMultiGraph.h> |
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43 | #include <TCanvas.h> |
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44 | #include <TGaxis.h> |
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45 | #include <TLegend.h> |
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46 | #include <TRandom.h> |
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47 | #include <TROOT.h> |
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48 | #include <TMath.h> |
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49 | #include <TTree.h> |
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50 | #include <TBenchmark.h> |
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51 | #include <TClonesArray.h> |
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52 | #include "Ntrace_optics.hh" |
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53 | #include "NOpticalSystem.hh" |
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54 | |
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55 | using namespace sou; |
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56 | |
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57 | ClassImp(OpticsResponseBuilder) |
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58 | |
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59 | //_____________________________________________________________________________ |
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60 | OpticsResponseBuilder::OpticsResponseBuilder() : fDBName(""), fDBFile(0), |
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61 | fDBTree(0), fOpticalSystem(0), fIdealFocalSurface(0), fPsf(0), fPsfZoom(0), |
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62 | fPsfRProj(0), fCentroid(0.,0.,0.), fPoints(0), fParent(0), fSample(0) { |
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63 | // |
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64 | // Constructor |
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65 | // |
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66 | |
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67 | |
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68 | // default parameters |
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69 | fDiscRadius = ((NOpticalSystem*)fOpticalSystem)->GetOpticalSystemParam()->surface[1].r_lens; |
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70 | fEusoRadius = 1325.*mm; |
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71 | fRmax = 30.; |
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72 | fTriggDiam = 5.; |
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73 | |
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74 | // default settings |
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75 | fThetaMin = 0*deg; |
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76 | fThetaMax = 30*deg; |
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77 | fLambdaMin = 300*nm; |
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78 | fLambdaMax = 400*nm; |
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79 | |
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80 | fBinsTheta = 30; |
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81 | fBinsLambda = 100; |
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82 | fPsfBins = 100; |
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83 | fPsfZoomSide = 15.*mm; |
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84 | |
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85 | fPoints = new TClonesArray("TVector3"); |
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86 | SetNrays(10000); |
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87 | |
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88 | fParent = new ParentPhoton; |
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89 | |
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90 | } |
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91 | |
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92 | //_____________________________________________________________________________ |
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93 | OpticsResponseBuilder::~OpticsResponseBuilder() { |
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94 | // |
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95 | // Destructor |
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96 | // |
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97 | |
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98 | SafeDelete( fDBFile ); |
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99 | SafeDelete( fPsf ); |
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100 | SafeDelete( fPsfZoom ); |
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101 | SafeDelete( fPsfRProj ); |
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102 | SafeDelete( fPoints ); |
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103 | SafeDelete( fParent ); |
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104 | SafeDelete( fSample ); |
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105 | } |
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106 | |
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107 | //_____________________________________________________________________________ |
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108 | void OpticsResponseBuilder::SetNrays(Int_t n){ |
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109 | // |
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110 | // Reset clear fPoints and reset its size |
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111 | // |
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112 | |
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113 | fNrays = n; |
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114 | fPoints->Clear(); |
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115 | fPoints->Expand(n); |
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116 | fPoints->BypassStreamer(kFALSE); |
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117 | |
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118 | } |
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119 | |
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120 | |
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121 | //______________________________________________________________________________ |
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122 | void OpticsResponseBuilder::Clear() { |
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123 | // |
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124 | // Clears all temporary histograms |
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125 | // |
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126 | |
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127 | SafeDelete( fPsf ); |
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128 | SafeDelete( fPsfZoom ); |
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129 | SafeDelete( fPsfRProj ); |
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130 | fPoints->Clear(); |
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131 | |
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132 | } |
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133 | |
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134 | //______________________________________________________________________________ |
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135 | void OpticsResponseBuilder::OpenDB() { |
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136 | // |
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137 | // Helper function. Opens and initializes the database |
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138 | // |
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139 | |
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140 | |
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141 | if ( fDBName.IsNull() ) { |
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142 | MsgForm(EsafMsg::Warning, "Database file name is empty. File not opened."); |
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143 | return; |
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144 | } |
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145 | |
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146 | |
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147 | fDBFile = new TFile(fDBName,"RECREATE"); |
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148 | |
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149 | if ( fDBFile->IsZombie() ) { |
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150 | MsgForm(EsafMsg::Warning, "File %s not opened.",fDBName.Data()); |
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151 | return; |
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152 | } |
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153 | |
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154 | EORHeader *header = new EORHeader; |
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155 | |
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156 | // instance database objects |
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157 | fSample = new EORSample; |
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158 | |
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159 | fDBTree = new TTree("ORDatabase","ORDatabase"); |
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160 | fDBTree->Branch("EORSample","EORSample",&fSample); |
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161 | |
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162 | // fill the header |
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163 | // simulation parameters |
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164 | header->SetOpticsName(fOpticalSystem->IsA()->GetName()); |
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165 | header->SetIdealSurfaceName(fIdealFocalSurface->IsA()->GetName()); |
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166 | |
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167 | header->SetDiscRadius( fDiscRadius ); |
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168 | header->SetEusoRadius( fEusoRadius ); |
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169 | header->SetRmax( fRmax ); |
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170 | header->SetTriggDiam( fTriggDiam ); |
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171 | |
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172 | // run parameters |
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173 | header->SetBins(fBinsTheta,fBinsLambda); |
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174 | header->SetNrays( fNrays ); |
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175 | |
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176 | // header will be deleted by TTree destructor |
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177 | fDBTree->GetUserInfo()->Add(header); |
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178 | |
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179 | MsgForm(EsafMsg::Info,"Database file %s opened.",fDBName.Data()); |
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180 | } |
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181 | |
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182 | //______________________________________________________________________________ |
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183 | void OpticsResponseBuilder::CloseDB() { |
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184 | // |
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185 | // |
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186 | // |
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187 | |
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188 | if ( !fDBFile ) { |
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189 | MsgForm(EsafMsg::Warning,"No database file opened."); |
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190 | return; |
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191 | } |
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192 | |
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193 | if ( fDBFile != fDBTree->GetCurrentFile() ) { |
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194 | MsgForm(EsafMsg::Warning,"Mismatch between database file and current TTree file."); |
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195 | Msg(EsafMsg::Warning) << "Maybe a file change has occurred. "; |
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196 | Msg(EsafMsg::Warning) << "Only the latter will be saved." << MsgDispatch; |
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197 | |
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198 | fDBFile = fDBTree->GetCurrentFile(); |
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199 | } |
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200 | |
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201 | fDBTree->Write(); |
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202 | SafeDelete( fDBTree ); |
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203 | SafeDelete( fDBFile ); |
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204 | SafeDelete( fSample ); |
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205 | } |
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206 | |
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207 | //_____________________________________________________________________________ |
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208 | Bool_t OpticsResponseBuilder::ComputeEfficacy(Float_t theta, Float_t phi, Float_t lambda) { |
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209 | // |
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210 | // Simulate and collect a uniform beam of photons for the chosen optical |
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211 | // system. |
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212 | // |
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213 | |
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214 | |
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215 | if ( !fOpticalSystem ) { |
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216 | Msg(EsafMsg::Warning) << "No OpticalSystem defined. Exiting."<< MsgDispatch; |
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217 | return kFALSE; |
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218 | } |
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219 | |
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220 | if ( !fIdealFocalSurface ) { |
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221 | Msg(EsafMsg::Warning) << "No IdealFocalSurface defined. Exiting."<< MsgDispatch; |
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222 | return kFALSE; |
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223 | } |
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224 | |
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225 | |
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226 | Double_t pos[3] = {0,0,0}; |
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227 | Double_t spos[3] = {0,0,0}; |
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228 | |
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229 | Int_t ntrans(0); |
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230 | Photon* ph; |
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231 | TVector3 dir(TMath::Sin(theta)*TMath::Cos(phi), TMath::Sin(theta)*TMath::Sin(phi),TMath::Cos(theta)); |
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232 | for( Int_t i(0); i<fNrays; i++) { |
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233 | |
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234 | // new photon position |
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235 | Double_t x,y,z; |
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236 | RandomPosOnLense(x,y,z); |
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237 | TVector3 pos_back(x,y,z); |
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238 | // pos_back.Dump(); |
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239 | pos_back = pos_back - 1*dir; |
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240 | // pos_back.Dump(); |
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241 | pos[0] = pos_back.X(); |
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242 | pos[1] = pos_back.Y(); |
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243 | pos[2] = pos_back.Z(); |
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244 | |
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245 | // update the fParent |
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246 | fParent->Build(0, spos, pos, theta, phi, lambda, 0, Fluorescence); |
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247 | ph = &(fParent->GetPhoton()); |
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248 | |
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249 | ph = fOpticalSystem->Transport(ph); |
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250 | // printf("optics history %d\n",ph->history); |
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251 | // reject dead photons and going downward |
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252 | if (!ph || ph->dir.Z() < 0.) continue; |
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253 | |
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254 | fIdealFocalSurface->HitPosition(ph); |
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255 | if (!ph->hitIfs) continue; |
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256 | TClonesArray &ref = *fPoints; |
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257 | new(ref[ntrans++]) TVector3(ph->posOnIfs); |
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258 | } |
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259 | |
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260 | Float_t pflux = fNrays/(TMath::Pi()*TMath::Power(fDiscRadius,2)*TMath::Cos(theta));//wrong normalization for SIDECUT! |
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261 | fTotalEfficacy = ntrans/pflux; |
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262 | if ( fSample ) { |
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263 | // fill the sample with the current results |
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264 | fSample->SetTheta( theta ); |
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265 | fSample->SetLambda( lambda ); |
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266 | fSample->SetTotalEfficacy( fTotalEfficacy ); |
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267 | } |
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268 | |
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269 | FillPsfHist(); |
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270 | |
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271 | if ( !fPsfRProj ) { |
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272 | MsgForm(EsafMsg::Warning,"No photons in the point spread function"); |
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273 | return kTRUE; |
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274 | } |
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275 | |
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276 | Int_t bin = fPsfRProj->GetXaxis()->FindBin(fTriggDiam/2.); |
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277 | fTriggEfficacy = fPsfRProj->Integral(1,bin)/pflux; |
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278 | fPsf->Scale(1./pflux); |
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279 | fPsfZoom->Scale(1./pflux); |
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280 | |
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281 | if ( fSample ) { |
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282 | fSample->SetTriggEfficacy( fTriggEfficacy ); |
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283 | fSample->SetCentroid( fCentroid ); |
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284 | fSample->SetPsfHist( fPsfZoom ); |
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285 | } |
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286 | |
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287 | return kTRUE; |
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288 | } |
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289 | |
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290 | //______________________________________________________________________________ |
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291 | void OpticsResponseBuilder::RandomPosOnLense(Double_t &x, Double_t &y, Double_t &z) { |
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292 | //This method returns a random position on a bottom lense of EUSO. |
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293 | TRandom* rndm = EsafRandom::Get(); |
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294 | Double_t LenseCurvature = ((NOpticalSystem*)fOpticalSystem)->GetOpticalSystemParam()->surface[1].Rc; |
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295 | Double_t Ycut = ((NOpticalSystem*)fOpticalSystem)->GetOpticalSystemParam()->surface[1].r_cut; |
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296 | Double_t fDiskRadius = ((NOpticalSystem*)fOpticalSystem)->GetOpticalSystemParam()->surface[1].r_lens; |
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297 | // Double_t zmax = fOpticalSystem->FirstLensTop(); |
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298 | Double_t zmin = fOpticalSystem->Bottom(); |
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299 | Double_t CosThetaMin = TMath::Sqrt(pow(LenseCurvature,2) - pow(fDiskRadius,2))/LenseCurvature; |
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300 | |
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301 | while (1) { |
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302 | Double_t cosTheta = CosThetaMin + rndm->Rndm()*(1-CosThetaMin); |
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303 | Double_t phi = TMath::TwoPi()*rndm->Rndm(); |
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304 | Double_t sinTheta = TMath::Sqrt(1-pow(cosTheta,2)); |
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305 | y = LenseCurvature*sinTheta*TMath::Sin(phi); |
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306 | if (fabs(y) < Ycut) { |
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307 | x = LenseCurvature*sinTheta*TMath::Cos(phi); |
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308 | z = LenseCurvature*(1-cosTheta) + zmin; |
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309 | // printf("%g %g %g %g %g %g\n",x,y,z,zmin,zmax,fDiskRadius); |
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310 | break; |
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311 | } |
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312 | } |
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313 | } |
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314 | //______________________________________________________________________________ |
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315 | void OpticsResponseBuilder::FillPsfHist() { |
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316 | // |
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317 | // Build histograms |
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318 | // |
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319 | |
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320 | Float_t xmin, ymin; |
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321 | Float_t xmax, ymax; |
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322 | xmin = ymin =-fEusoRadius; |
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323 | xmax = ymax = fEusoRadius; |
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324 | Int_t npos = fPoints->GetEntriesFast(); |
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325 | |
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326 | if ( fPsf ) { |
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327 | //TOCHECK: is it fast? |
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328 | fPsf->SetBins(20*fPsfBins, xmin, xmax, 20*fPsfBins, ymin, ymax); |
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329 | fPsf->Reset(); |
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330 | } else { |
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331 | fPsf = new TH2F("psf", "Psf", 20*fPsfBins, xmin, xmax, 20*fPsfBins, ymin, ymax); |
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332 | fPsf->SetDirectory(0); |
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333 | } |
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334 | |
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335 | // search for the peak |
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336 | for (Int_t i=0; i< npos; i++) { |
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337 | TVector3 *pos = (TVector3*)fPoints->At(i); |
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338 | fPsf->Fill(pos->X(),pos->Y()); |
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339 | } |
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340 | Int_t bx, by, bz; |
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341 | fPsf->GetMaximumBin(bx, by, bz); |
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342 | |
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343 | |
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344 | Double_t peakX = fPsf->GetXaxis()->GetBinCenter( bx ); |
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345 | Double_t peakY = fPsf->GetYaxis()->GetBinCenter( by ); |
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346 | |
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347 | TVector3 fAverage(0,0,0); |
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348 | |
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349 | Int_t nnear(0); |
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350 | Float_t spacethreshold = 20.*mm; |
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351 | |
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352 | // find the center of mass around the peak |
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353 | for (Int_t i=0; i< npos; i++ ){ |
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354 | TVector3 *pos = (TVector3*)fPoints->At(i); |
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355 | Double_t dist = TMath::Sqrt(TMath::Power(pos->X()-peakX,2) |
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356 | +TMath::Power(pos->Y()-peakY,2)); |
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357 | if ( dist > spacethreshold) continue; |
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358 | fAverage += *pos; |
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359 | nnear++; |
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360 | } |
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361 | |
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362 | if (nnear == 0) |
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363 | return; |
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364 | |
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365 | fAverage *= 1./nnear; |
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366 | |
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367 | xmin = fAverage.X()-fPsfZoomSide; |
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368 | xmax = fAverage.X()+fPsfZoomSide; |
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369 | ymin = fAverage.Y()-fPsfZoomSide; |
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370 | ymax = fAverage.Y()+fPsfZoomSide; |
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371 | |
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372 | // build the projection |
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373 | if ( fPsfRProj ) { |
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374 | fPsfRProj->SetBins( fPsfBins, 0, fPsfZoomSide ); |
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375 | fPsfRProj->Reset(); |
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376 | } else { |
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377 | fPsfRProj = new TH1F("PsfRProj", "Psf R-projection", fPsfBins, 0, fPsfZoomSide); |
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378 | fPsfRProj->SetDirectory(0); |
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379 | } |
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380 | |
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381 | // build the zoom |
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382 | if ( fPsfZoom ) { |
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383 | fPsfZoom->SetBins( fPsfBins, xmin, xmax, fPsfBins, ymin, ymax); |
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384 | fPsfZoom->Reset(); |
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385 | } else { |
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386 | fPsfZoom = new TH2F("PsfZoom", "Psf Zoom", 3*fPsfBins, xmin, xmax, 3*fPsfBins, ymin, ymax); |
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387 | fPsfZoom->SetDirectory(0); |
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388 | } |
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389 | |
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390 | |
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391 | fCentroid = fAverage; |
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392 | |
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393 | Float_t r; |
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394 | for (Int_t i=0; i< nnear; i++) { |
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395 | TVector3 *pos = (TVector3*)fPoints->At(i); |
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396 | fPsfZoom->Fill(pos->X(), pos->Y()); |
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397 | r = (*pos - fAverage).Mag(); |
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398 | if( r < fRmax) |
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399 | fPsfRProj->Fill( r ); |
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400 | } |
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401 | |
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402 | fPsf->GetXaxis()->SetTitle("mm"); |
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403 | fPsf->GetYaxis()->SetTitle("mm"); |
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404 | fPsf->GetYaxis()->SetTitleOffset(1.2); |
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405 | |
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406 | fPsfRProj->GetXaxis()->SetTitle("mm"); |
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407 | |
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408 | } |
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409 | |
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410 | |
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411 | //______________________________________________________________________________ |
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412 | void OpticsResponseBuilder::BuildEfficacyTables() { |
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413 | // |
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414 | // |
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415 | // |
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416 | |
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417 | OpenDB(); |
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418 | |
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419 | Float_t th, wl; |
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420 | Float_t thstep = (fThetaMax-fThetaMin)/fBinsTheta; |
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421 | Float_t wlstep = (fLambdaMax-fLambdaMin)/fBinsLambda; |
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422 | |
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423 | if ( fDBTree ) { |
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424 | EORHeader* header = (EORHeader*)fDBTree->GetUserInfo()->FindObject("EORHeader"); |
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425 | if ( header ) { |
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426 | header->SetThetaMin(fThetaMin); |
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427 | header->SetThetaMax(fThetaMax); |
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428 | header->SetThetaIndexMin(0); |
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429 | header->SetThetaIndexMax(fBinsTheta); |
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430 | header->SetLambdaMin(fLambdaMin); |
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431 | header->SetLambdaMax(fLambdaMax); |
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432 | header->SetLambdaIndexMin(0); |
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433 | header->SetLambdaIndexMax(fBinsLambda); |
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434 | header->SetPsfBins(fPsfBins); |
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435 | } |
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436 | } |
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437 | |
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438 | for (Int_t i(0); i <=fBinsTheta; i++) { |
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439 | th = fThetaMin + thstep*i; |
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440 | Msg(EsafMsg::Info) << Form("Theta: %.2f deg ", th/deg) << MsgFlush; |
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441 | for (Int_t j(0); j <=fBinsLambda; j++) { |
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442 | wl = fLambdaMin + wlstep*j; |
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443 | if ( (j+1)*10%fBinsLambda == 0 ) |
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444 | Msg(EsafMsg::Info) << " ... "<<j*100/fBinsLambda << '%'<< MsgFlush; |
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445 | |
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446 | ComputeEfficacy(th, 0. ,wl); |
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447 | |
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448 | if ( fSample ) { |
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449 | fSample->SetThetaIndex( i ); |
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450 | fSample->SetLambdaIndex( j ); |
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451 | } |
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452 | |
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453 | if ( fDBTree ) fDBTree->Fill(); |
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454 | |
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455 | if ( fSample ) fSample->Clear(); |
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456 | Clear(); |
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457 | } |
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458 | Msg(EsafMsg::Info) << " -done. " << MsgDispatch; |
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459 | } |
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460 | CloseDB(); |
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461 | } |
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