1 #include <TGeoVolume.h>
3 #include <TGeoManager.h>
5 #include "AliITSURecoDet.h"
6 #include "AliITSUGeomTGeo.h"
7 #include "AliITSsegmentation.h"
8 #include "AliITSUSegmentationPix.h"
9 #include "AliITSUClusterPix.h"
10 #include "AliITSUReconstructor.h"
14 ClassImp(AliITSURecoDet)
17 const Char_t* AliITSURecoDet::fgkBeamPipeVolName = "IP_PIPE";
19 //______________________________________________________
20 AliITSURecoDet::AliITSURecoDet()
33 //______________________________________________________
34 AliITSURecoDet::AliITSURecoDet(AliITSUGeomTGeo* geom, const char* name)
45 SetNameTitle(name,name);
46 fLayers.SetOwner(kTRUE); // layers belong to this array
47 fLayersActive.SetOwner(kFALSE); // this one just points on active layers in fLayers
51 //______________________________________________________
52 AliITSURecoDet::~AliITSURecoDet()
55 fLayersActive.Clear();
56 fLayers.Clear(); // owned!
59 //______________________________________________________
60 void AliITSURecoDet::Print(Option_t* opt) const
63 printf("Detector %s, %d layers, %d active layers\n",GetName(),GetNLayers(),GetNLayersActive());
64 TString opts = opt; opts.ToLower();
65 if (opts.Contains("lr")) {
66 for (int i=0;i<GetNLayers();i++) GetLayer(i)->Print(opt);
67 printf("ITS-TPC matching reference R: %.3f\n",fRITSTPCRef);
71 //______________________________________________________
72 void AliITSURecoDet::AddLayer(const AliITSURecoLayer* lr)
75 fLayers.AddLast((TObject*)lr);
78 fLayersActive.AddLast((TObject*)lr);
83 //______________________________________________________
84 Bool_t AliITSURecoDet::Build()
86 // build detector from TGeo
88 if (!fGeom) AliFatal("Geometry interface is not set");
89 int nlr = fGeom->GetNLayers();
90 if (!nlr) AliFatal("No geometry loaded");
92 // build active ITS layers
93 for (int ilr=0;ilr<nlr;ilr++) {
94 int lrTyp = fGeom->GetLayerChipTypeID(ilr);
95 // name layer according its active id, detector type and segmentation tyoe
96 AliITSURecoLayer* lra = new AliITSURecoLayer(Form("Lr%d%s%d",ilr,fGeom->GetChipTypeName(lrTyp),
97 lrTyp%AliITSUGeomTGeo::kMaxSegmPerChipType),
99 lra->SetPassive(kFALSE);
103 // build passive ITS layers
105 double rMin,rMax,zMin,zMax;
107 TGeoVolume *v = gGeoManager->GetVolume(fgkBeamPipeVolName);
108 AliITSURecoLayer* lrp = 0;
109 if (!v) AliWarning("No beam pipe found in geometry");
111 TGeoTube *t=(TGeoTube*)v->GetShape();
116 lrp = new AliITSURecoLayer("BeamPipe");
119 lrp->SetR(0.5*(rMin+rMax));
122 lrp->SetPassive(kTRUE);
128 const AliITSURecoParam* recopar = AliITSUReconstructor::GetRecoParam();
130 lrp = new AliITSURecoLayer("TPC-ITSwall");
131 lrp->SetRMin(AliITSUReconstructor::GetRecoParam()->GetTPCITSWallRMin());
132 lrp->SetRMax(AliITSUReconstructor::GetRecoParam()->GetTPCITSWallRMax());
133 lrp->SetR(0.5*(lrp->GetRMin()+lrp->GetRMax()));
134 lrp->SetZMin(-AliITSUReconstructor::GetRecoParam()->GetTPCITSWallZSpanH());
135 lrp->SetZMax( AliITSUReconstructor::GetRecoParam()->GetTPCITSWallZSpanH());
136 lrp->SetMaxStep( AliITSUReconstructor::GetRecoParam()->GetTPCITSWallMaxStep());
137 lrp->SetPassive(kTRUE);
141 AliWarning("RecoParam is not available, TPC-ITS wall is not set");
149 //______________________________________________________
150 void AliITSURecoDet::IndexLayers()
152 // sort and index layers
153 const Double_t kRMargin = 1e-2; // 100 micron margin
154 fLayersActive.Sort();
155 for (int i=0;i<fNLayersActive;i++) GetLayerActive(i)->SetActiveID(i);
157 for (int i=0;i<fNLayers;i++) GetLayer(i)->SetID(i);
159 SetRMin(GetLayer(0)->GetRMin()-kRMargin);
160 SetRMax(GetLayer(fNLayers-1)->GetRMax()+kRMargin);
163 // define the reference R for ITS/TPC matching: outside of last layer but before TPC materials
164 const double kOffsLastActR = 5.; // offset of reference layer wrt last active R
165 int lastActive = GetLrIDActive(fNLayersActive-1);
166 AliITSURecoLayer* lrA = GetLayer(lastActive); // last active
167 double rref = lrA->GetRMax() + kOffsLastActR;
169 if (lastActive < fNLayers-1) { // there are material layers outside ...
170 AliITSURecoLayer* lrL = GetLayer(lastActive+1);
171 if (lrL->GetRMin()<=rref) rref = lrL->GetRMin();
172 if (rref - lrA->GetRMax()<kOffsLastActR) {
173 AliError(Form("The ITS-TPC matching reference R=%.2f is too close to last active R=%.3f",rref,lrA->GetRMax()));
180 //______________________________________________________
181 Int_t AliITSURecoDet::FindLastLayerID(Double_t r, int dir) const
183 // find the last layer which the particle moving in direction dir (1:outward,-1:inward)
184 // will traverse on its way to radius r
188 for (ilr=0;ilr<fNLayers;ilr++) {
189 AliITSURecoLayer* lr = GetLayer(ilr);
190 if ( r<lr->GetR(-dir) ) break; // this layer at least entered
192 return --ilr; // -1 will correspond to point below the smalles layer
195 for (ilr=fNLayers;ilr--;) {
196 AliITSURecoLayer* lr = GetLayer(ilr);
197 if ( r>lr->GetR(-dir) ) break; // this layer at least entered
200 return ilr<fNLayers ? ilr:-1; // -1 will correspond to point above outer layer
205 //______________________________________________________
206 Int_t AliITSURecoDet::FindFirstLayerID(Double_t r, int dir) const
208 // find the first layer which the particle moving in direction dir (1:outward,-1:inward)
209 // will traverse starting from radius r
213 for (ilr=0;ilr<fNLayers;ilr++) {
214 AliITSURecoLayer* lr = GetLayer(ilr);
215 if ( r<lr->GetR(dir) ) break; // this layer at least entered
217 return ilr<fNLayers ? ilr:-1; // -1 will correspond to point above outer leayer
220 for (ilr=fNLayers;ilr--;) {
221 AliITSURecoLayer* lr = GetLayer(ilr);
222 if ( r>lr->GetR(dir) ) break; // this layer at least entered
224 return ilr; // -1 will correspond to point below inner layer
229 //______________________________________________________
230 void AliITSURecoDet::CreateClusterArrays()
232 // create cluster arrays for active layers
233 for (int ilr=0;ilr<fNLayersActive;ilr++) {
234 AliITSURecoLayer* lr = GetLayerActive(ilr);
235 lr->SetOwnsClusterArray(kTRUE);
236 int tpDet = fGeom->GetLayerChipTypeID(ilr)/AliITSUGeomTGeo::kMaxSegmPerChipType;
238 if (tpDet == AliITSUGeomTGeo::kChipTypePix) {
239 lr->SetClusters(new TClonesArray(AliITSUClusterPix::Class()));
242 AliFatal(Form("Unknown detector type %d",tpDet));
249 //_____________________________________________________________________________
250 Int_t AliITSURecoDet::LoadClusters(TTree* treeRP)
252 // read clusters from the tree, if it is provided
253 if (!treeRP) return 0;
254 for (int ilr=fNLayersActive;ilr--;) {
255 TBranch* br = treeRP->GetBranch(Form("ITSRecPoints%d",ilr));
256 if (!br) AliFatal(Form("Provided cluster tree does not contain branch for layer %d",ilr));
257 br->SetAddress( GetLayerActive(ilr)->GetClustersAddress() );
259 return treeRP->GetEntry(0); // we are still in 1 ev/tree mode...