1 | /* ======================================================================== *\
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2 | !
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3 | ! *
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4 | ! * This file is part of CheObs, the Modular Analysis and Reconstruction
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5 | ! * Software. It is distributed to you in the hope that it can be a useful
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6 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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7 | ! * It is distributed WITHOUT ANY WARRANTY.
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8 | ! *
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9 | ! * Permission to use, copy, modify and distribute this software and its
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10 | ! * documentation for any purpose is hereby granted without fee,
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11 | ! * provided that the above copyright notice appears in all copies and
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12 | ! * that both that copyright notice and this permission notice appear
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13 | ! * in supporting documentation. It is provided "as is" without express
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14 | ! * or implied warranty.
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15 | ! *
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16 | !
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17 | !
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18 | ! Author(s): Thomas Bretz, 1/2009 <mailto:tbretz@astro.uni-wuerzburg.de>
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19 | !
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20 | ! Copyright: CheObs Software Development, 2000-2009
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21 | !
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22 | !
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23 | \* ======================================================================== */
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24 |
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25 | //////////////////////////////////////////////////////////////////////////////
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26 | //
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27 | // MSimCamera
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28 | //
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29 | // This task initializes the analog channels with analog noise and simulated
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30 | // the analog pulses from the photon signal.
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31 | //
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32 | // Input Containers:
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33 | // MPhotonEvent
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34 | // MPhotonStatistics
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35 | // MRawRunHeader
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36 | //
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37 | // Output Containers:
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38 | // MAnalogChannels
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39 | //
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40 | //////////////////////////////////////////////////////////////////////////////
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41 | #include "MSimCamera.h"
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42 |
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43 | #include <TF1.h>
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44 |
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45 | #include "MLog.h"
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46 | #include "MLogManip.h"
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47 |
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48 | #include "MSpline3.h"
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49 |
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50 | #include "MParList.h"
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51 |
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52 | #include "MPhotonEvent.h"
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53 | #include "MPhotonData.h"
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54 |
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55 | #include "MAnalogSignal.h"
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56 | #include "MAnalogChannels.h"
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57 |
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58 | #include "MRawRunHeader.h"
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59 |
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60 | ClassImp(MSimCamera);
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61 |
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62 | using namespace std;
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63 |
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64 | // --------------------------------------------------------------------------
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65 | //
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66 | // Default Constructor.
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67 | //
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68 | MSimCamera::MSimCamera(const char* name, const char *title)
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69 | : fEvt(0), fStat(0), fRunHeader(0), fCamera(0), fSpline(0),
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70 | fFunction("exp(-(x/2)^2/2)"), fNpx(25), fXmin(-25), fXmax(25)
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71 | {
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72 | fName = name ? name : "MSimCamera";
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73 | fTitle = title ? title : "Task to simulate the electronic noise and to convert photons into pulses";
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74 | }
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75 |
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76 | // --------------------------------------------------------------------------
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77 | //
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78 | // Call Clear()
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79 | //
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80 | MSimCamera::~MSimCamera()
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81 | {
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82 | Clear();
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83 | }
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84 |
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85 | // --------------------------------------------------------------------------
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86 | //
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87 | // Delete fSpline if set and set it to 0
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88 | //
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89 | void MSimCamera::Clear(Option_t *)
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90 | {
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91 | if (fSpline)
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92 | delete fSpline;
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93 | fSpline=0;
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94 | }
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95 |
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96 | // --------------------------------------------------------------------------
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97 | //
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98 | // Read the intended pulse shape from a file and initialize the spline
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99 | // accordingly
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100 | //
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101 | Bool_t MSimCamera::ReadFile(const char *fname)
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102 | {
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103 | if (!fRunHeader)
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104 | return kFALSE;
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105 |
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106 | if (fname)
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107 | fFileName = fname;
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108 |
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109 | *fLog << inf << "Reading pulse shape from " << fFileName << endl;
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110 |
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111 | const TGraph g(fFileName);
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112 | if (g.GetN()==0)
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113 | {
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114 | *fLog << err << "ERROR - No data points from " << fFileName << "." << endl;
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115 | return kFALSE;
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116 | }
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117 |
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118 | // option: b1/e1 b2/e2 (first second derivative?)
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119 | // option: valbeg/valend (first second derivative?)
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120 |
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121 | Clear();
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122 | fSpline = new MSpline3(g, fRunHeader->GetFreqSampling()/1000.);
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123 |
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124 | return kTRUE;
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125 | }
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126 |
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127 | void MSimCamera::SetFunction(const TF1 &f)
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128 | {
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129 | // FIXME: Use TF1 directly? (In most cases this seems to be slower)
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130 | if (!fRunHeader)
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131 | return;// kFALSE;
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132 |
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133 | // option: b1/e1 b2/e2 (first second derivative?)
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134 | // option: valbeg/valend (first second derivative?)
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135 |
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136 | // if (f.GetNpar()==0)
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137 | // No SUPPORT
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138 |
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139 | Clear();
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140 | fSpline = new MSpline3(f, fRunHeader->GetFreqSampling()/1000.);
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141 |
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142 | fFunction = f.GetTitle();
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143 | }
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144 |
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145 | Bool_t MSimCamera::SetFunction(const char *func, Int_t n, Double_t xmin, Double_t xmax)
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146 | {
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147 | // FIXME: Use TF1 directly? (In most cases this seems to be slower)
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148 | TF1 f("f", func, xmin, xmax);
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149 | f.SetNpx(n);
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150 |
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151 | SetFunction(f);
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152 |
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153 | return kTRUE;
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154 | }
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155 |
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156 | // --------------------------------------------------------------------------
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157 | //
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158 | // SetReadyToSave for fRunHeader
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159 | //
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160 | Bool_t MSimCamera::ReInit(MParList *pList)
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161 | {
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162 | // make that the run-header gets written to the file
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163 | fRunHeader->SetReadyToSave();
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164 |
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165 | return kTRUE;
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166 | }
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167 |
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168 | // --------------------------------------------------------------------------
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169 | //
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170 | // Search for the necessayr parameter containers.
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171 | // Setup spline for pulse shape.
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172 | //
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173 | Int_t MSimCamera::PreProcess(MParList *pList)
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174 | {
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175 | fCamera = (MAnalogChannels*)pList->FindCreateObj("MAnalogChannels");
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176 | if (!fCamera)
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177 | return kFALSE;
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178 |
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179 | fEvt = (MPhotonEvent*)pList->FindObject("MPhotonEvent");
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180 | if (!fEvt)
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181 | {
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182 | *fLog << err << "MPhotonEvent not found... aborting." << endl;
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183 | return kFALSE;
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184 | }
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185 |
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186 | fStat = (MPhotonStatistics*)pList->FindObject("MPhotonStatistics");
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187 | if (!fStat)
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188 | {
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189 | *fLog << err << "MPhotonStatistics not found... aborting." << endl;
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190 | return kFALSE;
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191 | }
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192 |
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193 | fRunHeader = (MRawRunHeader *)pList->FindObject("MRawRunHeader");
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194 | if (!fRunHeader)
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195 | {
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196 | *fLog << err << "MRawRunHeader not found... aborting." << endl;
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197 | return kFALSE;
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198 | }
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199 |
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200 |
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201 | // FIMXE: Move to ReInit in case fRunHeader is read form file?
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202 | if (!fFileName.IsNull())
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203 | return ReadFile(fFileName);
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204 |
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205 | if (!fFunction.IsNull())
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206 | return SetFunction(fFunction, fNpx, fXmin, fXmax);
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207 |
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208 | if (!fSpline)
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209 | {
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210 | *fLog << err << "No spline initialized." << endl;
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211 | return kFALSE;
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212 | }
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213 |
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214 | return kTRUE;
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215 | }
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216 |
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217 | // --------------------------------------------------------------------------
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218 | //
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219 | // fStat->GetMaxIndex must return the maximum index possible
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220 | // (equiv. number of pixels) not just the maximum index stored!
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221 | //
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222 | Int_t MSimCamera::Process()
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223 | {
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224 | // Calculate start time, end time and corresponding number of samples
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225 | const Double_t freq = fRunHeader->GetFreqSampling()/1000.;
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226 |
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227 | const Double_t start = fStat->GetTimeFirst()*freq + fSpline->GetXmin();
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228 | const Double_t end = fStat->GetTimeLast() *freq + fSpline->GetXmax();
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229 |
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230 | const UInt_t nlen = TMath::CeilNint(end-start);
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231 |
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232 | // FIXME: Jitter the start point of digitization by one sample [0;1]
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233 | // FIXME: TAKE PULSE WIDTH out of the calculation and start at TimeFirst
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234 |
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235 | // Get number of pixels/channels
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236 | const UInt_t npix = fStat->GetMaxIndex()+1;
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237 |
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238 | // Init the arrays and set the range which will contain valid data
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239 | fCamera->Init(npix, nlen);
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240 | fCamera->SetValidRange(0 -TMath::FloorNint(fSpline->GetXmin()),
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241 | nlen-TMath::CeilNint( fSpline->GetXmax()));
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242 |
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243 | // Add electronic noise to empty channels
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244 | for (UInt_t i=0; i<npix; i++)
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245 | {
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246 | // FIXME: We might add the base line here already.
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247 | (*fCamera)[i].AddGaussianNoise(22.5/64);
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248 | }
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249 |
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250 | // FIXME: Simulate correlations with neighboring pixels
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251 |
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252 | const Int_t num = fEvt->GetNumPhotons();
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253 |
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254 | // Simulate pulses
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255 | for (Int_t i=0; i<num; i++)
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256 | {
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257 | const MPhotonData &ph = (*fEvt)[i];
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258 |
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259 | const UInt_t idx = ph.GetTag();
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260 | const Double_t t = (ph.GetTime()-fStat->GetTimeFirst())*freq - fSpline->GetXmin();
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261 |
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262 | // FIXME: Time jitter?
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263 | // FIXME: Add additional routing here?
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264 |
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265 | (*fCamera)[idx].AddPulse(*fSpline, t, ph.GetWeight());
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266 | }
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267 |
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268 | return kTRUE;
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269 | }
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270 |
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271 | // --------------------------------------------------------------------------
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272 | //
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273 | // FileName: pulse-shape.txt
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274 | // Function.Name: gaus
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275 | // Function.Npx: 50
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276 | // Function.Xmin: -5
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277 | // Function.Xmax: 5
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278 | //
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279 | Int_t MSimCamera::ReadEnv(const TEnv &env, TString prefix, Bool_t print)
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280 | {
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281 | Bool_t rc = kFALSE;
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282 | if (IsEnvDefined(env, prefix, "FileName", print))
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283 | {
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284 | rc = kTRUE;
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285 | SetFileName(GetEnvValue(env, prefix, "FileName", fFileName));
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286 | }
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287 |
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288 | if (IsEnvDefined(env, prefix, "Function.Name", print))
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289 | {
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290 | rc = kTRUE;
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291 | SetFunction(GetEnvValue(env, prefix, "Function.Name", fFunction));
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292 |
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293 | if (IsEnvDefined(env, prefix, "Function.Npx", print))
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294 | fNpx = GetEnvValue(env, prefix, "Function.Npx", fNpx);
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295 | if (IsEnvDefined(env, prefix, "Function.Xmin", print))
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296 | fXmin = GetEnvValue(env, prefix, "Function.Xmin", fXmin);
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297 | if (IsEnvDefined(env, prefix, "Function.Xmax", print))
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298 | fXmax = GetEnvValue(env, prefix, "Function.Xmax", fXmax);
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299 | }
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300 |
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301 | return rc;
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302 | }
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303 |
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304 | /*
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305 | MSimCameraFiles::Process()
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306 | {
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307 | // fCorsikaHeader->GetEvtNumber() --> fMcEvt->SetEvtNumber()
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308 | // fCorsikaHeader->GetTotalEnergy() --> fMcEvt->SetEnergy()
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309 | // fCorsikaHeader->GetParticleID() --> fMcEvt->SetParticleID()
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310 | // fCorsikaHeader->GetImpact() --> fMcEvt->SetImpact()
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311 | // fCorsikaHeader->GetTheta() --> fMcEvt->SetTheta()
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312 | // fCorsikaHeader->GetPhi() --> fMcEvt->SetPhi()
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313 | // fPointingPos->GetTheta() --> fMcEvt->SetTelescopeTheta()
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314 | // fPointingPos->GetPhi() --> fMcEvt->SetTelescopePhi()
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315 | // fStats->GetTimeFirst() --> fMcEvt->SetTimeFirst()
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316 | // fStats->GetTimeLast() --> fMcEvt->SetTimeLast()
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317 | // fMcEvt->SetReuse()
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318 | // MMcCorsikaRunHeader: fSlopeSpec, fELowLim, fEUppLim;
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319 |
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320 | fMcEvt->Fill(*fCorsikaHeader, *fPointingPos, *fStats);
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321 |
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322 | return kTRUE;
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323 | }
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324 | */
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325 |
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