| 1 | /*
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| 2 | * Delphes: a framework for fast simulation of a generic collider experiment
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| 3 | * Copyright (C) 2012-2014 Universite catholique de Louvain (UCL), Belgium
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| 4 | *
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| 5 | * This program is free software: you can redistribute it and/or modify
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| 6 | * it under the terms of the GNU General Public License as published by
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| 7 | * the Free Software Foundation, either version 3 of the License, or
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| 8 | * (at your option) any later version.
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| 9 | *
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| 10 | * This program is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | * GNU General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU General Public License
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| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 |
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| 19 | #include "display/Delphes3DGeometry.h"
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| 20 | #include <set>
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| 21 | #include <map>
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| 22 | #include <utility>
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| 23 | #include <vector>
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| 24 | #include <algorithm>
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| 25 | #include <sstream>
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| 26 | #include <cassert>
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| 27 | #include "TGeoManager.h"
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| 28 | #include "TGeoVolume.h"
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| 29 | #include "TGeoMedium.h"
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| 30 | #include "TGeoNode.h"
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| 31 | #include "TGeoCompositeShape.h"
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| 32 | #include "TGeoMatrix.h"
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| 33 | #include "TGeoTube.h"
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| 34 | #include "TGeoCone.h"
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| 35 | #include "TGeoArb8.h"
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| 36 | #include "external/ExRootAnalysis/ExRootConfReader.h"
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| 37 | #include "classes/DelphesClasses.h"
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| 38 | #include "TF2.h"
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| 39 | #include "TH1F.h"
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| 40 | #include "TMath.h"
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| 41 |
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| 42 | using namespace std;
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| 43 |
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| 44 | Delphes3DGeometry::Delphes3DGeometry(TGeoManager *geom, bool transp) {
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| 45 |
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| 46 | //--- the geometry manager
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| 47 | geom_ = geom==NULL? gGeoManager : geom;
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| 48 | //gGeoManager->DefaultColors();
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| 49 |
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| 50 | //--- define some materials
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| 51 | TGeoMaterial *matVacuum = new TGeoMaterial("Vacuum", 0,0,0);
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| 52 | TGeoMaterial *matAl = new TGeoMaterial("Al", 26.98,13,2.7); // placeholder
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| 53 | if(transp) {
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| 54 | matVacuum->SetTransparency(85);
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| 55 | matAl->SetTransparency(85);
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| 56 | }
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| 57 |
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| 58 | //--- define some media
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| 59 | TGeoMedium *Vacuum = new TGeoMedium("Vacuum",1, matVacuum);
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| 60 | TGeoMedium *Al = new TGeoMedium("Root Material",2, matAl);
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| 61 | vacuum_ = Vacuum;
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| 62 | tkmed_ = Vacuum; // placeholder
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| 63 | calomed_ = Al; // placeholder
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| 64 | mudetmed_ = Al; // placeholder
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| 65 |
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| 66 | // custom parameters
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| 67 | contingency_ = 10.;
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| 68 | calo_barrel_thickness_ = 50.;
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| 69 | calo_endcap_thickness_ = 75.;
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| 70 | muonSystem_thickn_ = 10.;
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| 71 |
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| 72 | // read these parameters from the Delphes Card (with default values)
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| 73 | etaAxis_ = NULL;
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| 74 | phiAxis_ = NULL;
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| 75 | tk_radius_ = 120.;
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| 76 | tk_length_ = 150.;
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| 77 | tk_etamax_ = 3.0;
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| 78 | tk_Bz_ = 1.;
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| 79 | muonSystem_radius_ = 200.;
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| 80 | }
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| 81 |
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| 82 | void Delphes3DGeometry::readFile(const char *configFile,
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| 83 | const char* ParticlePropagator, const char* TrackingEfficiency,
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| 84 | const char* MuonEfficiency, const char* Calorimeters) {
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| 85 |
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| 86 | ExRootConfReader *confReader = new ExRootConfReader;
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| 87 | confReader->ReadFile(configFile);
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| 88 |
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| 89 | tk_radius_ = confReader->GetDouble(Form("%s::Radius",ParticlePropagator), 1.0)*100.; // tk_radius
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| 90 | tk_length_ = confReader->GetDouble(Form("%s::HalfLength",ParticlePropagator), 3.0)*100.; // tk_length
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| 91 | tk_Bz_ = confReader->GetDouble("ParticlePropagator::Bz", 0.0); // tk_Bz
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| 92 |
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| 93 | {
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| 94 | TString tkEffFormula = confReader->GetString(Form("%s::EfficiencyFormula",TrackingEfficiency),"abs(eta)<3.0");
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| 95 | tkEffFormula.ReplaceAll("pt","x");
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| 96 | tkEffFormula.ReplaceAll("eta","y");
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| 97 | tkEffFormula.ReplaceAll("phi","0.");
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| 98 | TF2* tkEffFunction = new TF2("tkEff",tkEffFormula,0,1000,-10,10);
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| 99 | TH1F etaHisto("eta","eta",100,5.,-5.);
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| 100 | Double_t pt,eta;
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| 101 | for(int i=0;i<1000;++i) {
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| 102 | tkEffFunction->GetRandom2(pt,eta);
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| 103 | etaHisto.Fill(eta);
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| 104 | }
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| 105 | Int_t bin = -1;
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| 106 | bin = etaHisto.FindFirstBinAbove(0.5);
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| 107 | Double_t etamin = (bin>-1) ? etaHisto.GetBinLowEdge(bin) : -10.;
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| 108 | bin = etaHisto.FindLastBinAbove(0.5);
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| 109 | Double_t etamax = (bin>-1) ? etaHisto.GetBinLowEdge(bin+1) : -10.;
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| 110 | tk_etamax_ = TMath::Max(fabs(etamin),fabs(etamax)); // tk_etamax
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| 111 | delete tkEffFunction;
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| 112 | }
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| 113 |
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| 114 | {
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| 115 | muondets_.push_back("muons");
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| 116 | TString muonEffFormula = confReader->GetString(Form("%s::EfficiencyFormula",MuonEfficiency),"abs(eta)<2.0");
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| 117 | muonEffFormula.ReplaceAll("pt","x");
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| 118 | muonEffFormula.ReplaceAll("eta","y");
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| 119 | muonEffFormula.ReplaceAll("phi","0.");
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| 120 | TF2* muEffFunction = new TF2("muEff",muonEffFormula,0,1000,-10,10);
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| 121 | TH1F etaHisto("eta2","eta2",100,5.,-5.);
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| 122 | Double_t pt,eta;
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| 123 | for(int i=0;i<1000;++i) {
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| 124 | muEffFunction->GetRandom2(pt,eta);
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| 125 | etaHisto.Fill(eta);
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| 126 | }
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| 127 | Int_t bin = -1;
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| 128 | bin = etaHisto.FindFirstBinAbove(0.5);
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| 129 | Double_t etamin = (bin>-1) ? etaHisto.GetBinLowEdge(bin) : -10.;
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| 130 | bin = etaHisto.FindLastBinAbove(0.5);
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| 131 | Double_t etamax = (bin>-1) ? etaHisto.GetBinLowEdge(bin+1) : -10.;
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| 132 | muonSystem_etamax_["muons"] = TMath::Max(fabs(etamin),fabs(etamax)); // muonSystem_etamax
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| 133 | delete muEffFunction;
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| 134 | }
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| 135 |
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| 136 | std::string s(Calorimeters);
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| 137 | std::replace( s.begin(), s.end(), ',', ' ' );
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| 138 | std::istringstream stream( s );
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| 139 | std::string word;
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| 140 | while (stream >> word) calorimeters_.push_back(word);
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| 141 |
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| 142 | caloBinning_.clear(); // calo binning
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| 143 | for(std::vector<std::string>::const_iterator calo=calorimeters_.begin();calo!=calorimeters_.end(); ++calo) {
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| 144 | set< pair<Double_t, Int_t> > caloBinning;
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| 145 | ExRootConfParam paramEtaBins, paramPhiBins;
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| 146 | ExRootConfParam param = confReader->GetParam(Form("%s::EtaPhiBins",calo->c_str()));
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| 147 | Int_t size = param.GetSize();
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| 148 | for(int i = 0; i < size/2; ++i) {
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| 149 | paramEtaBins = param[i*2];
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| 150 | paramPhiBins = param[i*2+1];
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| 151 | assert(paramEtaBins.GetSize()==1);
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| 152 | caloBinning.insert(std::make_pair(paramEtaBins[0].GetDouble(),paramPhiBins.GetSize()-1));
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| 153 | }
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| 154 | caloBinning_[*calo] = caloBinning;
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| 155 | }
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| 156 |
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| 157 | set< pair<Double_t, Int_t> > caloBinning = caloBinning_[*calorimeters_.begin()];
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| 158 | Double_t *etaBins = new Double_t[caloBinning.size()]; // note that this is the eta binning of the first calo
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| 159 | unsigned int ii = 0;
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| 160 | for(set< pair<Double_t, Int_t> >::const_iterator itEtaSet = caloBinning.begin(); itEtaSet != caloBinning.end(); ++itEtaSet) {
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| 161 | etaBins[ii++] = itEtaSet->first;
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| 162 | }
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| 163 | etaAxis_ = new TAxis(caloBinning.size() - 1, etaBins);
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| 164 | phiAxis_ = new TAxis(72, -TMath::Pi(), TMath::Pi()); // note that this is fixed while #phibins could vary, also with eta, which doesn't seem possible in ROOT
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| 165 |
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| 166 | muonSystem_radius_ = tk_radius_ + contingency_ + (contingency_+calo_barrel_thickness_)*calorimeters_.size() + muonSystem_thickn_;
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| 167 | muonSystem_length_ = tk_length_ + contingency_ + (contingency_+calo_endcap_thickness_)*calorimeters_.size() + muonSystem_thickn_;
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| 168 |
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| 169 | delete confReader;
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| 170 |
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| 171 | }
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| 172 |
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| 173 | TGeoVolume* Delphes3DGeometry::getDetector(bool withTowers) {
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| 174 | // compute the envelope
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| 175 | Double_t system_radius = tk_radius_+calo_barrel_thickness_+3*contingency_;
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| 176 | Double_t system_length = tk_length_+contingency_+(contingency_+calo_endcap_thickness_)*calorimeters_.size()+contingency_;
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| 177 | // the detector volume
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| 178 | TGeoVolume *top = geom_->MakeBox("Delphes3DGeometry", vacuum_, system_radius, system_radius, system_length);
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| 179 | // build the detector
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| 180 | std::pair<Double_t, Double_t> limits = addTracker(top);
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| 181 | Double_t radius = limits.first;
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| 182 | Double_t length = limits.second;
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| 183 | for(std::vector<std::string>::const_iterator calo = calorimeters_.begin(); calo != calorimeters_.end(); ++calo) {
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| 184 | limits = addCalorimeter(top,calo->c_str(),radius,length,caloBinning_[*calo]);
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| 185 | if (withTowers) {
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| 186 | addCaloTowers(top,calo->c_str(),radius,length,caloBinning_[*calo]);
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| 187 | }
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| 188 | radius = limits.first;
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| 189 | length = limits.second;
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| 190 | }
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| 191 | for(std::vector<std::string>::const_iterator muon = muondets_.begin(); muon != muondets_.end(); ++muon) {
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| 192 | limits = addMuonDets(top, muon->c_str(), radius, length);
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| 193 | radius = limits.first;
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| 194 | length = limits.second;
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| 195 | }
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| 196 | // return the result
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| 197 | return top;
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| 198 | }
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| 199 |
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| 200 | std::pair<Double_t, Double_t> Delphes3DGeometry::addTracker(TGeoVolume *top) {
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| 201 | // tracker: a cylinder with two cones substracted
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| 202 | new TGeoCone("forwardTkAcceptance",(tk_length_/2.+0.05),0.,tk_radius_,(tk_length_)*2.*exp(-tk_etamax_)/(1-exp(-2.*tk_etamax_)),tk_radius_);
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| 203 | TGeoTranslation *tr1 = new TGeoTranslation("tkacc1",0., 0., tk_length_/2.);
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| 204 | tr1->RegisterYourself();
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| 205 | TGeoRotation *negz = new TGeoRotation("tknegz",0,180,0);
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| 206 | negz->RegisterYourself();
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| 207 | TGeoCombiTrans *tr2 = new TGeoCombiTrans("tkacc2",0.,0.,-tk_length_/2.,negz);
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| 208 | tr2->RegisterYourself();
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| 209 | TGeoCompositeShape* tracker_cs = new TGeoCompositeShape("tracker_cs","forwardTkAcceptance:tkacc1+forwardTkAcceptance:tkacc2");
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| 210 | TGeoVolume *tracker = new TGeoVolume("tracker",tracker_cs,tkmed_);
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| 211 | tracker->SetLineColor(kYellow);
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| 212 | top->AddNode(tracker,1);
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| 213 | return std::make_pair(tk_radius_,tk_length_);
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| 214 | }
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| 215 |
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| 216 | std::pair<Double_t, Double_t> Delphes3DGeometry::addCalorimeter(TGeoVolume *top, const char* name,
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| 217 | Double_t innerBarrelRadius, Double_t innerBarrelLength, set< pair<Double_t, Int_t> >& caloBinning) {
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| 218 | // parameters derived from the inputs
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| 219 | Double_t calo_endcap_etamax = TMath::Max(fabs(caloBinning.begin()->first),fabs(caloBinning.rbegin()->first));
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| 220 | Double_t calo_barrel_innerRadius = innerBarrelRadius+contingency_;
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| 221 | Double_t calo_barrel_length = innerBarrelLength + calo_barrel_thickness_;
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| 222 | Double_t calo_endcap_etamin = -log(innerBarrelRadius/(2*innerBarrelLength));
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| 223 | Double_t calo_endcap_innerRadius1 = innerBarrelLength*2.*exp(-calo_endcap_etamax)/(1-exp(-2.*calo_endcap_etamax));
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| 224 | Double_t calo_endcap_innerRadius2 = (innerBarrelLength+calo_endcap_thickness_)*2.*exp(-calo_endcap_etamax)/(1-exp(-2.*calo_endcap_etamax));
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| 225 | Double_t calo_endcap_outerRadius1 = innerBarrelRadius;
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| 226 | Double_t calo_endcap_outerRadius2 = innerBarrelRadius+calo_barrel_thickness_;
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| 227 | Double_t calo_endcap_coneThickness = TMath::Min(calo_barrel_thickness_ * (1-exp(-2.*calo_endcap_etamin)) / (2.*exp(-calo_endcap_etamin)), calo_endcap_thickness_);
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| 228 | Double_t calo_endcap_diskThickness = TMath::Max(0.,calo_endcap_thickness_-calo_endcap_coneThickness);
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| 229 |
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| 230 | // calorimeters: tube truncated in eta + cones
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| 231 | new TGeoTube(Form("%s_barrel_cylinder",name),calo_barrel_innerRadius,calo_barrel_innerRadius+calo_barrel_thickness_,calo_barrel_length);
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| 232 | new TGeoCone(Form("%s_endcap_cone",name),calo_endcap_coneThickness/2.,calo_endcap_innerRadius1,calo_endcap_outerRadius1,calo_endcap_innerRadius2,calo_endcap_outerRadius2);
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| 233 | new TGeoTube(Form("%s_endcap_disk",name),calo_endcap_innerRadius2,tk_radius_+calo_barrel_thickness_,calo_endcap_diskThickness/2.);
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| 234 | TGeoTranslation *tr1 = new TGeoTranslation(Form("%s_tr1",name),0., 0., (calo_endcap_coneThickness+calo_endcap_diskThickness)/2.);
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| 235 | tr1->RegisterYourself();
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| 236 | TGeoCompositeShape *calo_endcap_cs = new TGeoCompositeShape(Form("%s_endcap_cs",name),Form("%s_endcap_cone+%s_endcap_disk:%s_tr1",name,name,name));
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| 237 | TGeoTranslation *trc1 = new TGeoTranslation(Form("%s_endcap1_position",name),0.,0., innerBarrelLength+calo_endcap_coneThickness/2.);
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| 238 | trc1->RegisterYourself();
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| 239 | TGeoRotation *negz = new TGeoRotation(Form("%s_negz",name),0,180,0);
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| 240 | TGeoCombiTrans *trc2 = new TGeoCombiTrans(Form("%s_endcap2_position",name),0.,0.,-(innerBarrelLength+calo_endcap_coneThickness/2.),negz);
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| 241 | trc2->RegisterYourself();
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| 242 | TGeoTranslation *trc1c = new TGeoTranslation(Form("%s_endcap1_position_cont",name),0.,0., innerBarrelLength+calo_endcap_coneThickness/2.+contingency_);
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| 243 | trc1c->RegisterYourself();
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| 244 | TGeoCombiTrans *trc2c = new TGeoCombiTrans(Form("%s_endcap2_position_cont",name),0.,0.,-(innerBarrelLength+calo_endcap_coneThickness/2.)-contingency_,negz);
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| 245 | trc2c->RegisterYourself();
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| 246 | TGeoVolume *calo_endcap = new TGeoVolume(Form("%s_endcap",name),calo_endcap_cs,calomed_);
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| 247 | TGeoCompositeShape *calo_barrel_cs = new TGeoCompositeShape(Form("%s_barrel_cs",name),
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| 248 | Form("%s_barrel_cylinder-%s_endcap_cs:%s_endcap1_position-%s_endcap_cs:%s_endcap2_position",name,name,name,name,name));
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| 249 | TGeoVolume *calo_barrel = new TGeoVolume(Form("%s_barrel",name),calo_barrel_cs,calomed_);
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| 250 | calo_endcap->SetLineColor(kViolet);
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| 251 | calo_endcap->SetFillColor(kViolet);
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| 252 | calo_barrel->SetLineColor(kRed);
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| 253 | top->AddNode(calo_endcap,1,trc1c);
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| 254 | top->AddNode(calo_endcap,2,trc2c);
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| 255 | top->AddNode(calo_barrel,1);
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| 256 | return std::make_pair(calo_barrel_innerRadius+calo_barrel_thickness_,innerBarrelLength+calo_endcap_thickness_+contingency_);
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| 257 | }
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| 258 |
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| 259 | std::pair<Double_t, Double_t> Delphes3DGeometry::addMuonDets(TGeoVolume *top, const char* name, Double_t innerBarrelRadius, Double_t innerBarrelLength) {
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| 260 | // muon system: tube + disks
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| 261 | Double_t muonSystem_radius = innerBarrelRadius + contingency_;
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| 262 | Double_t muonSystem_length = innerBarrelLength + contingency_;
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| 263 | Double_t muonSystem_rmin = muonSystem_length*2.*exp(-muonSystem_etamax_[name])/(1-exp(-2.*muonSystem_etamax_[name]));
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| 264 | TGeoVolume *muon_barrel = geom_->MakeTube(Form("%s_barrel",name),mudetmed_,muonSystem_radius,muonSystem_radius+muonSystem_thickn_,muonSystem_length);
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| 265 | muon_barrel->SetLineColor(kBlue);
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| 266 | top->AddNode(muon_barrel,1);
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| 267 | TGeoVolume *muon_endcap = geom_->MakeTube(Form("%s_endcap",name),mudetmed_,muonSystem_rmin,muonSystem_radius+muonSystem_thickn_,muonSystem_thickn_/2.);
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| 268 | muon_endcap->SetLineColor(kBlue);
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| 269 | TGeoTranslation *trm1 = new TGeoTranslation(Form("%sEndcap1_position",name),0.,0.,muonSystem_length);
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| 270 | trm1->RegisterYourself();
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| 271 | TGeoTranslation *trm2 = new TGeoTranslation(Form("%sEndcap2_position",name),0.,0.,-muonSystem_length);
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| 272 | trm1->RegisterYourself();
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| 273 | top->AddNode(muon_endcap,1,trm1);
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| 274 | top->AddNode(muon_endcap,2,trm2);
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| 275 | return std::make_pair(muonSystem_radius,muonSystem_length);
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| 276 | }
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| 277 |
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| 278 | void Delphes3DGeometry::addCaloTowers(TGeoVolume *top, const char* name,
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| 279 | Double_t innerBarrelRadius, Double_t innerBarrelLength, set< pair<Double_t, Int_t> >& caloBinning) {
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| 280 |
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| 281 | TGeoVolume* calo_endcap = top->GetNode(Form("%s_endcap_1",name))->GetVolume();
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| 282 | TGeoVolume* calo_barrel = top->GetNode(Form("%s_barrel_1",name))->GetVolume();
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| 283 | Double_t calo_endcap_etamin = -log(innerBarrelRadius/(2*innerBarrelLength));
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| 284 | Double_t calo_endcap_coneThickness = TMath::Min(calo_barrel_thickness_ * (1-exp(-2.*calo_endcap_etamin)) / (2.*exp(-calo_endcap_etamin)), calo_endcap_thickness_);
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| 285 |
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| 286 | // calo towers in the barrel
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| 287 | Double_t vertices[16] = {0.,0.,0.,0.,0.,0.,0.,0.}; // summit of the pyramid
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| 288 | Double_t R = tk_radius_ + contingency_+(contingency_+calo_barrel_thickness_)*calorimeters_.size(); // radius of the muons system = height of the pyramid
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| 289 | Int_t nEtaBins = caloBinning.size();
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| 290 | // this rotation is to make the tower point "up"
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| 291 | TGeoRotation* initTowerRot = new TGeoRotation(Form("%s_initTowerRot",name),0.,90.,0.);
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| 292 | TGeoCombiTrans* initTower = new TGeoCombiTrans(Form("%s_initTower",name),0.,-R/2.,0.,initTowerRot);
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| 293 | initTower->RegisterYourself();
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| 294 | // eta bins... we build one pyramid per eta slice and then translate it nphi times.
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| 295 | // phi bins represented by rotations around z
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| 296 | Double_t *y = new Double_t[nEtaBins];
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| 297 | Double_t *dx = new Double_t[nEtaBins];
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| 298 | Int_t *nphi = new Int_t[nEtaBins];
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| 299 | Int_t etaslice = 0;
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| 300 | std::map<std::pair<int,int>, TGeoRotation*> phirotations;
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| 301 | for(set< pair<Double_t, Int_t> >::const_iterator bin=caloBinning.begin(); bin!=caloBinning.end();++bin) {
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| 302 | if(abs(bin->first)>calo_endcap_etamin) continue; // only in the barrel
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| 303 | nphi[etaslice] = bin->second;
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| 304 | y[etaslice] = 0.5*R*(1-exp(-2*bin->first))/exp(-bin->first);
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| 305 | Double_t phiRotationAngle = 360./nphi[etaslice];
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| 306 | dx[etaslice] = R*tan(TMath::Pi()*phiRotationAngle/360.);
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| 307 | for(int phislice=0;phislice<nphi[etaslice];++phislice) {
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| 308 | phirotations[make_pair(etaslice,phislice)] = new TGeoRotation(Form("%s_phi%d_%d",name,etaslice,phislice),phiRotationAngle*phislice,0.,0.);
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| 309 | phirotations[make_pair(etaslice,phislice)]->RegisterYourself();
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| 310 | }
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| 311 | ++etaslice;
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| 312 | }
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| 313 | nEtaBins = etaslice;
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| 314 | for(int i=0;i<nEtaBins-1;++i) { // loop on the eta slices
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| 315 | vertices[8] = -dx[i]; vertices[9] = y[i];
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| 316 | vertices[10] = -dx[i]; vertices[11] = y[i+1];
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| 317 | vertices[12] = dx[i]; vertices[13] = y[i+1];
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| 318 | vertices[14] = dx[i]; vertices[15] = y[i];
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| 319 | new TGeoArb8(Form("%s_tower%d",name,i),R/2., vertices); // tower in the proper eta slice, at phi=0
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| 320 | // intersection between the tower and the calo_barrel
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| 321 | TGeoCompositeShape *finaltower_cs = new TGeoCompositeShape(Form("%s_ftower%d_cs",name,i),Form("%s_tower%d:%s_initTower*%s_barrel_cs",name,i,name,name));
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| 322 | TGeoVolume *finaltower = new TGeoVolume(Form("%s_ftower%d",name,i),finaltower_cs,calomed_);
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| 323 | finaltower->SetLineColor(kRed);
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| 324 | for(int j=0;j<nphi[i];++j) { // loop on the phi slices
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| 325 | calo_barrel->AddNode(finaltower,j,phirotations[make_pair(i,j)]);
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| 326 | }
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| 327 | }
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| 328 | delete[] y;
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| 329 | delete[] dx;
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| 330 | delete[] nphi;
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| 331 | //the towers in the forward region
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| 332 | R = tk_length_+contingency_+(contingency_+calo_endcap_thickness_)*calorimeters_.size(); // Z of the muons system = height of the pyramid
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| 333 | nEtaBins = caloBinning.size();
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| 334 | // translation to bring the origin of the tower to (0,0,0) (well, not really as the endcap is not yet in place)
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| 335 | TGeoTranslation* towerdz = new TGeoTranslation(Form("%s_towerdz",name),0.,0.,R/2.-(innerBarrelLength+calo_endcap_coneThickness/2.));
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| 336 | towerdz->RegisterYourself();
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| 337 | // eta bins... we build one pyramid per eta slice and then translate it nphi times.
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| 338 | Double_t *r = new Double_t[nEtaBins];
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| 339 | nphi = new Int_t[nEtaBins];
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| 340 | etaslice = 0;
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| 341 | phirotations.clear();
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| 342 | for(set< pair<Double_t, Int_t> >::const_iterator bin=caloBinning.begin(); bin!=caloBinning.end();++bin) {
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| 343 | if(bin->first<calo_endcap_etamin) continue; // only in the + endcap
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| 344 | r[etaslice] = R*2*exp(-bin->first)/(1-exp(-2*bin->first));
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| 345 | nphi[etaslice] = bin->second;
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| 346 | Double_t phiRotationAngle = 360./nphi[etaslice];
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| 347 | for(int phislice=0;phislice<nphi[etaslice];++phislice) {
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| 348 | phirotations[make_pair(etaslice,phislice)] = new TGeoRotation(Form("%s_forward_phi%d_%d",name,etaslice,phislice),phiRotationAngle*phislice,0.,0.);
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| 349 | phirotations[make_pair(etaslice,phislice)]->RegisterYourself();
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| 350 | }
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| 351 | ++etaslice;
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| 352 | }
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| 353 | nEtaBins = etaslice;
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| 354 | for(int i=0;i<nEtaBins-1;++i) { // loop on the eta slices
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| 355 | vertices[8] = -r[i+1]*sin(TMath::Pi()/nphi[i]); vertices[9] = r[i+1]*cos(TMath::Pi()/nphi[i]);
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| 356 | vertices[10] = -r[i]*sin(TMath::Pi()/nphi[i]); vertices[11] = r[i]*cos(TMath::Pi()/nphi[i]);
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| 357 | vertices[12] = r[i]*sin(TMath::Pi()/nphi[i]); vertices[13] = r[i]*cos(TMath::Pi()/nphi[i]);
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| 358 | vertices[14] = r[i+1]*sin(TMath::Pi()/nphi[i]); vertices[15] = r[i+1]*cos(TMath::Pi()/nphi[i]);
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| 359 | new TGeoArb8(Form("%sfwdtower%d",name,i),R/2., vertices); // tower in the proper eta slice, at phi=0
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| 360 | // intersection between the tower and the calo_endcap
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| 361 | TGeoCompositeShape *finalfwdtower_cs = new TGeoCompositeShape(Form("%sffwdtower%d_cs",name,i),Form("%sfwdtower%d:%s_towerdz*%s_endcap_cs",name,i,name,name));
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| 362 | TGeoVolume *finalfwdtower = new TGeoVolume(Form("%sffwdtower%d",name,i),finalfwdtower_cs,calomed_);
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| 363 | finalfwdtower->SetLineColor(kViolet);
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| 364 | for(int j=0;j<nphi[i];++j) { // loop on the phi slices
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| 365 | calo_endcap->AddNode(finalfwdtower,j,phirotations[make_pair(i,j)]);
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| 366 | }
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| 367 | }
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| 368 | delete[] r;
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| 369 | delete[] nphi;
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| 370 | }
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| 371 |
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