From: hristov Date: Thu, 24 Nov 2005 09:29:17 +0000 (+0000) Subject: TRD seeding without vertex constrain implemented (M.Ivanov) X-Git-Url: http://git.uio.no/git/?a=commitdiff_plain;h=69b55c5549cb0733252b0baadd41ef8972c11990;p=u%2Fmrichter%2FAliRoot.git TRD seeding without vertex constrain implemented (M.Ivanov) --- diff --git a/TRD/AliTRDtracker.cxx b/TRD/AliTRDtracker.cxx index 81502d8e65b..68e972fc952 100644 --- a/TRD/AliTRDtracker.cxx +++ b/TRD/AliTRDtracker.cxx @@ -20,6 +20,7 @@ // The standard TRD tracker // // // /////////////////////////////////////////////////////////////////////////////// +#include #include #include @@ -38,10 +39,13 @@ #include "TTreeStream.h" #include "TGraph.h" #include "AliTRDtracker.h" +#include "TLinearFitter.h" +#include "AliRieman.h" // ClassImp(AliTRDtracker) +ClassImp(AliTRDseed) const Float_t AliTRDtracker::fgkSeedDepth = 0.5; const Float_t AliTRDtracker::fgkSeedStep = 0.10; @@ -51,7 +55,7 @@ ClassImp(AliTRDtracker) const Float_t AliTRDtracker::fgkMaxSeedDeltaZ = 25.; const Float_t AliTRDtracker::fgkMaxSeedC = 0.0052; const Float_t AliTRDtracker::fgkMaxSeedTan = 1.2; - const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.; + const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.; const Double_t AliTRDtracker::fgkSeedErrorSY = 0.2; const Double_t AliTRDtracker::fgkSeedErrorSY3 = 2.5; @@ -75,11 +79,12 @@ ClassImp(AliTRDtracker) // const Double_t AliTRDtracker::fgkDriftCorrection = 1.07; // const Double_t AliTRDtracker::fgkExB = 0.072; - const Double_t AliTRDtracker::fgkOffset = -0.015; -const Double_t AliTRDtracker::fgkOffsetX = 0.26; // "time offset" - const Double_t AliTRDtracker::fgkCoef = 0.0096; // angular shift + const Double_t AliTRDtracker::fgkOffset = -0.019; + const Double_t AliTRDtracker::fgkOffsetX = 0.26; // "time offset" +// const Double_t AliTRDtracker::fgkCoef = 0.0096; // angular shift + const Double_t AliTRDtracker::fgkCoef = 0.0106; // angular shift const Double_t AliTRDtracker::fgkMean = 0.; - const Double_t AliTRDtracker::fgkDriftCorrection = 1.04; // drift coefficient correction + const Double_t AliTRDtracker::fgkDriftCorrection = 1.055; // drift coefficient correction const Double_t AliTRDtracker::fgkExB = 0.072; // ExB angle - for error parameterization @@ -173,6 +178,9 @@ AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker() fNtracks = 0; fTracks = new TObjArray(1000); + static struct mallinfo memdebug; + memdebug = mallinfo(); + printf("Before: %i in bytes\n",memdebug.uordblks); for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) { Int_t trS = CookSectorIndex(geomS); fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS, fPar); @@ -180,6 +188,8 @@ AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker() fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS); } } + memdebug = mallinfo(); + printf("After: %i in bytes\n",memdebug.uordblks); AliTRDpadPlane *padPlane = fPar->GetPadPlane(0,0); Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle()); // Float_t tiltAngle = TMath::Abs(fPar->GetTiltingAngle()); @@ -537,6 +547,7 @@ Int_t AliTRDtracker::PropagateBack(AliESD* event) { track->CookdEdx(); CookdEdxTimBin(*track); CookLabel(track, 1-fgkLabelFraction); + if (track->GetBackupTrack()) UseClusters(track->GetBackupTrack()); if(track->GetChi2()/track->GetNumberOfClusters()<4) { // sign only gold tracks if (seed->GetKinkIndex(0)==0&&TMath::Abs(track->GetPt())<1.5 ) UseClusters(track); } @@ -564,8 +575,6 @@ Int_t AliTRDtracker::PropagateBack(AliESD* event) { } } } - - // // Debug part of tracking TTreeSRedirector& cstream = *fDebugStreamer; Int_t eventNr = event->GetEventNumber(); @@ -654,8 +663,8 @@ Int_t AliTRDtracker::PropagateBack(AliESD* event) { cerr<<"Number of seeds: "<Clear(); fNseeds=0; @@ -1298,6 +1307,7 @@ Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t) } + //___________________________________________________________________ Int_t AliTRDtracker::FollowBackProlongationG(AliTRDtrack& t) { @@ -1778,6 +1788,10 @@ Int_t AliTRDtracker::LoadClusters(TTree *cTree) Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb); index=ncl; + // + // apply pos correction + Float_t poscor = fgkCoef*(c->GetLocalTimeBin() - fgkMean)+fgkOffset; + c->SetY(c->GetY()-poscor); fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index); } // printf("\r\n"); @@ -1834,17 +1848,13 @@ void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn) } Double_t x[5], c[15]; - Int_t maxSec=AliTRDgeometry::kNsect; - + Int_t maxSec=AliTRDgeometry::kNsect; Double_t alpha=AliTRDgeometry::GetAlpha(); Double_t shift=AliTRDgeometry::GetAlpha()/2.; Double_t cs=cos(alpha), sn=sin(alpha); - Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha); - - + Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha); Int_t i2 = fTrSec[0]->GetLayerNumber(inner); - Int_t i1 = fTrSec[0]->GetLayerNumber(outer); - + Int_t i1 = fTrSec[0]->GetLayerNumber(outer); Double_t x1 =fTrSec[0]->GetX(i1); Double_t xx2=fTrSec[0]->GetX(i2); @@ -1994,23 +2004,39 @@ void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn) } } //__________________________________________________________________________ -void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/) +void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD * esd) { // // Creates seeds using clusters between position inner plane and outer plane // + const Double_t maxtheta = 1; + const Double_t maxphi = 2.0; + // + const Double_t kRoad0y = 6; // road for middle cluster + const Double_t kRoad0z = 8.5; // road for middle cluster + // + const Double_t kRoad1y = 2; // road in y for seeded cluster + const Double_t kRoad1z = 20; // road in z for seeded cluster + // + const Double_t kRoad2y = 3; // road in y for extrapolated cluster + const Double_t kRoad2z = 20; // road in z for extrapolated cluster + const Int_t maxseed = 3000; + Int_t maxSec=AliTRDgeometry::kNsect; - const Double_t maxtheta = 2; - const Double_t maxphi = 1.5; - Int_t maxSec=AliTRDgeometry::kNsect; - + // + // linear fitters in planes + TLinearFitter fitterTC(2,"hyp2"); // fitting with tilting pads - kz fixed - kz= Z/x, + vertex const + TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed + fitterTC.StoreData(kTRUE); + fitterT2.StoreData(kTRUE); + AliRieman rieman(1000); // rieman fitter + AliRieman rieman2(1000); // rieman fitter // // find the maximal and minimal layer for the planes - // fucking "object oriented" geometry - find the time bin range for different planes // Int_t layers[6][2]; + AliTRDpropagationLayer* reflayers[6]; for (Int_t i=0;i<6;i++){layers[i][0]=10000; layers[i][1]=0;} - for (Int_t ns=0;nsGetNumberOfLayers();ilayer++){ AliTRDpropagationLayer& layer=*(fTrSec[ns]->GetLayer(ilayer)); @@ -2022,143 +2048,910 @@ void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/) } } // - - Int_t ilayer1 = layers[5][1]; // time bin in mplification region - Int_t ilayer2 = layers[3][1]; // - Int_t ilayerM = layers[4][1]; // - // - Double_t x1 = fTrSec[0]->GetX(ilayer1); - Double_t x2 = fTrSec[0]->GetX(ilayer2); - Double_t xm = fTrSec[0]->GetX(ilayerM); - Double_t dist = x2-x1; - // Int_t indexes1[20]; - //Int_t indexes2[20]; - AliTRDcluster *clusters1[15],*clusters2[15],*clustersM[15]; - // - // - for (Int_t ns=0; nsGetLayer(ilayer1)); //select propagation layers - AliTRDpropagationLayer& layer2=*(fTrSec[ns]->GetLayer(ilayer2)); - // - for (Int_t icl1=0;icl1GetY(); - Double_t z1 = cl1->GetZ(); + AliTRDpadPlane *padPlane = fPar->GetPadPlane(0,0); + Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle()); + Double_t hL[6]; // tilting angle + Double_t xcl[6]; // x - position of reference cluster + Double_t ycl[6]; // y - position of reference cluster + Double_t zcl[6]; // z - position of reference cluster + AliTRDcluster *cl[6]={0,0,0,0,0,0}; // seeding clusters + Float_t padlength[6]={10,10,10,10,10,10}; //current pad-length + Double_t chi2R =0, chi2Z=0; + Double_t chi2RF =0, chi2ZF=0; + // + Int_t nclusters; // total number of clusters + for (Int_t i=0;i<6;i++) {hL[i]=h01; if (i%2==1) hL[i]*=-1.;} + // + // + // registered seed + AliTRDseed *pseed = new AliTRDseed[maxseed*6]; + AliTRDseed *seed[maxseed]; + for (Int_t iseed=0;iseed=0;sLayer--){ + //for (Int_t dseed=5;dseed<15; dseed+=3){ //loop over central seeding time bins + iter+=1.; + Int_t dseed = 5+Int_t(iter)*3; + // Initialize seeding layers + for (Int_t ilayer=0;ilayer<6;ilayer++){ + reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed); + xcl[ilayer] = reflayers[ilayer]->GetX(); + } // - for (Int_t icl2=0;icl2GetY(); - Double_t z2 = cl2->GetZ(); - Double_t tanphi = (y2-y1)/dist; - Double_t tantheta = (z2-z1)/dist; - if (TMath::Abs(tanphi)>maxphi) continue; - if (TMath::Abs(tantheta)>maxtheta) continue; + Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2])*0.5; + AliTRDpropagationLayer& layer0=*reflayers[sLayer+0]; + AliTRDpropagationLayer& layer1=*reflayers[sLayer+1]; + AliTRDpropagationLayer& layer2=*reflayers[sLayer+2]; + AliTRDpropagationLayer& layer3=*reflayers[sLayer+3]; + // + Int_t maxn3 = layer3; + for (Int_t icl3=0;icl3GetSigmaZ2()*12.); + ycl[sLayer+3] = cl3->GetY(); + zcl[sLayer+3] = cl3->GetZ(); + Float_t yymin0 = ycl[sLayer+3] - 1- maxphi *(xcl[sLayer+3]-xcl[sLayer+0]); + Float_t yymax0 = ycl[sLayer+3] + 1+ maxphi *(xcl[sLayer+3]-xcl[sLayer+0]); + Int_t maxn0 = layer0; // + for (Int_t icl0=layer0.Find(yymin0);icl0IsUsed()&&cl0->IsUsed()) continue; + ycl[sLayer+0] = cl0->GetY(); + zcl[sLayer+0] = cl0->GetZ(); + if ( ycl[sLayer+0]>yymax0) break; + Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]); + if (TMath::Abs(tanphi)>maxphi) continue; + Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]); + if (TMath::Abs(tantheta)>maxtheta) continue; + padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2()*12.); + // + // expected position in 1 layer + Double_t y1exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+1]-xcl[sLayer+0]); + Double_t z1exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+1]-xcl[sLayer+0]); + Float_t yymin1 = y1exp - kRoad0y-tanphi; + Float_t yymax1 = y1exp + kRoad0y+tanphi; + Int_t maxn1 = layer1; // + // + for (Int_t icl1=layer1.Find(yymin1);icl1IsUsed()) nusedCl++; + if (cl0->IsUsed()) nusedCl++; + if (cl1->IsUsed()) nusedCl++; + if (nusedCl>1) continue; + ycl[sLayer+1] = cl1->GetY(); + zcl[sLayer+1] = cl1->GetZ(); + if ( ycl[sLayer+1]>yymax1) break; + if (TMath::Abs(ycl[sLayer+1]-y1exp)>kRoad0y+tanphi) continue; + if (TMath::Abs(zcl[sLayer+1]-z1exp)>kRoad0z) continue; + padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2()*12.); + // + Double_t y2exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+2]-xcl[sLayer+0])+(ycl[sLayer+1]-y1exp); + Double_t z2exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+2]-xcl[sLayer+0]); + Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y, kRoad1z); + if (index2<=0) continue; + AliTRDcluster *cl2 = (AliTRDcluster*)GetCluster(index2); + padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2()*12.); + ycl[sLayer+2] = cl2->GetY(); + zcl[sLayer+2] = cl2->GetZ(); + if (TMath::Abs(cl2->GetZ()-z2exp)>kRoad0z) continue; + // + rieman.Reset(); + rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10); + rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10); + rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10); + rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10); + rieman.Update(); + // + // reset fitter + for (Int_t iLayer=0;iLayer<6;iLayer++){ + cseed[iLayer].Reset(); + } + chi2Z =0.; chi2R=0.; + for (Int_t iLayer=0;iLayer<4;iLayer++){ + cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]); + chi2Z += (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer])* + (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer]); + cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]); + cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]); + chi2R += (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer])* + (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer]); + cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]); + } + if (TMath::Sqrt(chi2R)>1./iter) continue; + if (TMath::Sqrt(chi2Z)>7./iter) continue; + // + // + // + Float_t minmax[2]={-100,100}; + for (Int_t iLayer=0;iLayer<4;iLayer++){ + Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer]*0.5+1 -cseed[sLayer+iLayer].fZref[0]; + if (maxminmax[0]) minmax[0]=min; + } + Bool_t isFake = kFALSE; + if (cl0->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE; + if (cl1->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE; + if (cl2->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE; + if ((!isFake) || (icl3%10)==0 ){ //debugging print + TTreeSRedirector& cstream = *fDebugStreamer; + cstream<<"Seeds0"<< + "isFake="<0) roadz = padlength[sLayer+jLayer]; + // + Float_t quality =10000; + for (Int_t iTime=2;iTime<20;iTime++){ + AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime)); + Double_t dxlayer= layer.GetX()-xcl[sLayer+jLayer]; + Double_t zexp = cl[sLayer+jLayer]->GetZ() ; + if (iter>0){ + // try 2 pad-rows in second iteration + zexp = tseed.fZref[0]+ tseed.fZref[1]*dxlayer; + if (zexp>cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()+padlength[sLayer+jLayer]*0.5; + if (zexpGetZ()) zexp = cl[sLayer+jLayer]->GetZ()-padlength[sLayer+jLayer]*0.5; + } + // + Double_t yexp = tseed.fYref[0]+ + tseed.fYref[1]*dxlayer; + Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz); + if (index<=0) continue; + AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index); + // + tseed.fIndexes[iTime] = index; + tseed.fClusters[iTime] = cl; // register cluster + tseed.fX[iTime] = dxlayer; // register cluster + tseed.fY[iTime] = cl->GetY(); // register cluster + tseed.fZ[iTime] = cl->GetZ(); // register cluster + } + tseed.Update(); + //count the number of clusters and distortions into quality + Float_t dangle = tseed.fYfit[1]-tseed.fYref[1]; + Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+ + TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+ + 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer]; + if (iter==0 && tseed.isOK()) { + cseed[sLayer+jLayer] = tseed; + quality = tquality; + if (tquality<5) break; + } + if (tseed.isOK() && tquality25){ + isOK = kFALSE; + break; + } + } + // + if (!isOK) continue; + nclusters=0; + for (Int_t iLayer=0;iLayer<4;iLayer++){ + if (cseed[sLayer+iLayer].isOK()){ + nclusters+=cseed[sLayer+iLayer].fN2; + } + } + // + // iteration 0 + rieman.Reset(); + for (Int_t iLayer=0;iLayer<4;iLayer++){ + rieman.AddPoint(xcl[sLayer+iLayer],cseed[sLayer+iLayer].fYfitR[0], + cseed[sLayer+iLayer].fZProb,1,10); + } + rieman.Update(); + // + // + chi2R =0; chi2Z=0; + for (Int_t iLayer=0;iLayer<4;iLayer++){ + cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]); + chi2R += (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0])* + (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0]); + cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]); + cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]); + chi2Z += (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz)* + (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz); + cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]); + } + Double_t curv = rieman.GetC(); + // + // likelihoods + // + Double_t sumda = + TMath::Abs(cseed[sLayer+0].fYfitR[1]- cseed[sLayer+0].fYref[1])+ + TMath::Abs(cseed[sLayer+1].fYfitR[1]- cseed[sLayer+1].fYref[1])+ + TMath::Abs(cseed[sLayer+2].fYfitR[1]- cseed[sLayer+2].fYref[1])+ + TMath::Abs(cseed[sLayer+3].fYfitR[1]- cseed[sLayer+3].fYref[1]); + Double_t likea = TMath::Exp(-sumda*10.6); + Double_t likechi2 = 0.0000000001; + if (chi2R<0.5) likechi2+=TMath::Exp(-TMath::Sqrt(chi2R)*7.73); + Double_t likechi2z = TMath::Exp(-chi2Z*0.088)/TMath::Exp(-chi2Z*0.019); + Double_t likeN = TMath::Exp(-(72-nclusters)*0.19); + Double_t like = likea*likechi2*likechi2z*likeN; + // + Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fYref[1]-130*curv)*1.9); + Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fZref[1]- + cseed[sLayer+0].fZref[0]/xcl[sLayer+0])*5.9); + Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005); + + seedquality[registered] = like; + seedlayer[registered] = sLayer; + if (TMath::Log(0.000000000000001+like)<-15) continue; + AliTRDseed seedb[6]; + for (Int_t iLayer=0;iLayer<6;iLayer++){ + seedb[iLayer] = cseed[iLayer]; + } + // + //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< + //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< + //<<<<<<<<<<<<<<< FULL TRACK FIT PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< + //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< + // + Int_t nlayers = 0; + Int_t nusedf = 0; + Int_t findable = 0; + // + // add new layers - avoid long extrapolation + // + Int_t tLayer[2]={0,0}; + if (sLayer==2) {tLayer[0]=1; tLayer[1]=0;} + if (sLayer==1) {tLayer[0]=5; tLayer[1]=0;} + if (sLayer==0) {tLayer[0]=4; tLayer[1]=5;} + // + for (Int_t iLayer=0;iLayer<2;iLayer++){ + Int_t jLayer = tLayer[iLayer]; // set tracking layer + cseed[jLayer].Reset(); + cseed[jLayer].fTilt = hL[jLayer]; + cseed[jLayer].fPadLength = padlength[jLayer]; + cseed[jLayer].fX0 = xcl[jLayer]; + // get pad length and rough cluster + Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].fYref[0], + cseed[jLayer].fZref[0],kRoad2y,kRoad2z); + if (indexdummy<=0) continue; + AliTRDcluster *cldummy = (AliTRDcluster*)GetCluster(indexdummy); + padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2()*12.); + } + AliTRDseed::FitRiemanTilt(cseed, kTRUE); + // + for (Int_t iLayer=0;iLayer<2;iLayer++){ + Int_t jLayer = tLayer[iLayer]; // set tracking layer + if ( (jLayer==0) && !(cseed[1].isOK())) continue; // break not allowed + if ( (jLayer==5) && !(cseed[4].isOK())) continue; // break not allowed + Float_t zexp = cseed[jLayer].fZref[0]; + Double_t zroad = padlength[jLayer]*0.5+1.; + // + // + for (Int_t iter=0;iter<2;iter++){ + AliTRDseed tseed = cseed[jLayer]; + Float_t quality = 10000; + for (Int_t iTime=2;iTime<20;iTime++){ + AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime)); + Double_t dxlayer = layer.GetX()-xcl[jLayer]; + Double_t yexp = tseed.fYref[0]+tseed.fYref[1]*dxlayer; + Float_t yroad = kRoad1y; + Int_t index = layer.FindNearestCluster(yexp,zexp, yroad, zroad); + if (index<=0) continue; + AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index); + // + tseed.fIndexes[iTime] = index; + tseed.fClusters[iTime] = cl; // register cluster + tseed.fX[iTime] = dxlayer; // register cluster + tseed.fY[iTime] = cl->GetY(); // register cluster + tseed.fZ[iTime] = cl->GetZ(); // register cluster + } + tseed.Update(); + if (tseed.isOK()){ + Float_t dangle = tseed.fYfit[1]-tseed.fYref[1]; + Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+ + TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+ + 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer]; + // + if (tquality=lastquality || chi2>lastchi2) break; + lastquality = sumquality; + lastchi2 = chi2; + if (iter>0){ + for (Int_t jLayer=0;jLayer<6;jLayer++){ + cseed[jLayer] = bseed[jLayer]; + } + } + TMath::Sort(6,squality,sortindexes,kFALSE); + // + // + for (Int_t jLayer=5;jLayer>1;jLayer--){ + Int_t bLayer = sortindexes[jLayer]; + AliTRDseed tseed = bseed[bLayer]; + for (Int_t iTime=2;iTime<20;iTime++){ + AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime)); + Double_t dxlayer= layer.GetX()-xcl[bLayer]; + // + Double_t zexp = tseed.fZref[0]; + Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]); + // + Float_t roadz = padlength[bLayer]+1; + if (TMath::Abs(tseed.fZProb-zexp)> padlength[bLayer]*0.5) {roadz = padlength[bLayer]*0.5;} + if (tseed.fZfit[1]*tseed.fZref[1]<0) {roadz = padlength[bLayer]*0.5;} + if (TMath::Abs(tseed.fZProb-zexp)<0.1*padlength[bLayer]) { + zexp = tseed.fZProb; + roadz = padlength[bLayer]*0.5; + } + // + Double_t yexp = tseed.fYref[0]+ + tseed.fYref[1]*dxlayer-zcor; + Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz); + if (index<=0) continue; + AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index); + // + tseed.fIndexes[iTime] = index; + tseed.fClusters[iTime] = cl; // register cluster + tseed.fX[iTime] = dxlayer; // register cluster + tseed.fY[iTime] = cl->GetY(); // register cluster + tseed.fZ[iTime] = cl->GetZ(); // register cluster + } + tseed.Update(); + if (tseed.isOK()) { + Float_t dangle = tseed.fYfit[1]-tseed.fYref[1]; + Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]); + // + Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+ + TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+ + 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer]; + // + if (tqualitypadlength[iLayer]*0.5+1) + acceptablez = kFALSE; + } + } + if (!acceptablez){ + fitterT2.FixParameter(3,zmf); + fitterT2.FixParameter(4,dzmf); + fitterT2.Eval(); + fitterT2.ReleaseParameter(3); + fitterT2.ReleaseParameter(4); + rpolz0 = fitterT2.GetParameter(3); + rpolz1 = fitterT2.GetParameter(4); + } + // + Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT); + Double_t chi2TC = fitterTC.GetChisquare()/Float_t(npointsT); + // + Double_t polz1c = fitterTC.GetParameter(2); + Double_t polz0c = polz1c*xref2; + // + Double_t aC = fitterTC.GetParameter(0); + Double_t bC = fitterTC.GetParameter(1); + Double_t CC = aC/TMath::Sqrt(bC*bC+1.); // curvature + // + Double_t aR = fitterT2.GetParameter(0); + Double_t bR = fitterT2.GetParameter(1); + Double_t dR = fitterT2.GetParameter(2); + Double_t CR = 1+bR*bR-dR*aR; + Double_t dca = 0.; + if (CR>0){ + dca = -dR/(TMath::Sqrt(1+bR*bR-dR*aR)+TMath::Sqrt(1+bR*bR)); + CR = aR/TMath::Sqrt(CR); + } + // + Double_t chi2ZT2=0, chi2ZTC=0; + for (Int_t iLayer=0; iLayer<6;iLayer++){ + if (cseed[iLayer].isOK()){ + Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2); + Double_t zTC = polz0c+polz1c*(xcl[iLayer] - xref2); + chi2ZT2 += TMath::Abs(cseed[iLayer].fMeanz-zT2); + chi2ZTC += TMath::Abs(cseed[iLayer].fMeanz-zTC); + } + } + chi2ZT2/=TMath::Max((nlayers-3.),1.); + chi2ZTC/=TMath::Max((nlayers-3.),1.); + // + // + // + AliTRDseed::FitRiemanTilt(cseed, kTRUE); + Float_t sumdaf = 0; + for (Int_t iLayer=0;iLayer<6;iLayer++){ + if (cseed[iLayer].isOK()) + sumdaf += TMath::Abs((cseed[iLayer].fYfit[1]-cseed[iLayer].fYref[1])/cseed[iLayer].fSigmaY2); + } + sumdaf /= Float_t (nlayers-2.); + // + // likelihoods for full track + // + Double_t likezf = TMath::Exp(-chi2ZF*0.14); + Double_t likechi2C = TMath::Exp(-chi2TC*0.677); + Double_t likechi2TR = TMath::Exp(-chi2TR*0.78); + Double_t likeaf = TMath::Exp(-sumdaf*3.23); + seedquality2[registered] = likezf*likechi2TR*likeaf; +// Bool_t isGold = kFALSE; +// +// if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold +// if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold +// if (isGold &&nusedf<10){ +// for (Int_t jLayer=0;jLayer<6;jLayer++){ +// if ( seed[index][jLayer].isOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1) +// seed[index][jLayer].UseClusters(); //sign gold +// } +// } + // + // + // + Int_t index0=0; + if (!cseed[0].isOK()){ + index0 = 1; + if (!cseed[1].isOK()) index0 = 2; + } + seedparams[registered][0] = cseed[index0].fX0; + seedparams[registered][1] = cseed[index0].fYref[0]; + seedparams[registered][2] = cseed[index0].fZref[0]; + seedparams[registered][5] = CR; + seedparams[registered][3] = cseed[index0].fX0*CR - TMath::Sin(TMath::ATan(cseed[0].fYref[1])); + seedparams[registered][4] = cseed[index0].fZref[1]/ + TMath::Sqrt(1+cseed[index0].fYref[1]*cseed[index0].fYref[1]); + seedparams[registered][6] = ns; + // + // + Int_t labels[12], outlab[24]; + Int_t nlab=0; + for (Int_t iLayer=0;iLayer<6;iLayer++){ + if (!cseed[iLayer].isOK()) continue; + if (cseed[iLayer].fLabels[0]>=0) { + labels[nlab] = cseed[iLayer].fLabels[0]; + nlab++; + } + if (cseed[iLayer].fLabels[1]>=0) { + labels[nlab] = cseed[iLayer].fLabels[1]; + nlab++; + } + } + Freq(nlab,labels,outlab,kFALSE); + Int_t label = outlab[0]; + Int_t frequency = outlab[1]; + for (Int_t iLayer=0;iLayer<6;iLayer++){ + cseed[iLayer].fFreq = frequency; + cseed[iLayer].fC = CR; + cseed[iLayer].fCC = CC; + cseed[iLayer].fChi2 = chi2TR; + cseed[iLayer].fChi2Z = chi2ZF; + } + // + if (1||(!isFake)){ //debugging print + Float_t zvertex = GetZ(); + TTreeSRedirector& cstream = *fDebugStreamer; + cstream<<"Seeds1"<< + "isFake="<GetLabel(ilab); + if (tindex>=0){ + labelsall[nlabelsall] = tindex; + nlabelsall++; + } + } + } + } + } + } // - clusters1[0] = cl1; - clusters2[0] = cl2; - Double_t road = 0.5+TMath::Abs(tanphi)*1; - Int_t ncl=0; - Double_t sum1=0, sumx1=0,sum2x1=0,sumxy1=0, sumy1=0; - Double_t sum2=0, sumx2=0,sum2x2=0,sumxy2=0, sumy2=0; + if (nused>30) continue; // - for (Int_t dlayer=1;dlayer<15;dlayer++){ - clusters1[dlayer]=0; - clusters2[dlayer]=0; - AliTRDpropagationLayer& layer1C=*(fTrSec[ns]->GetLayer(ilayer1-dlayer)); //select propagation layers - AliTRDpropagationLayer& layer2C=*(fTrSec[ns]->GetLayer(ilayer2-dlayer)); // - Double_t yy1 = y1+(tanphi) *(layer1C.GetX()-x1); - Double_t zz1 = z1+(tantheta)*(layer1C.GetX()-x1); - Double_t yy2 = y1+(tanphi) *(layer2C.GetX()-x1); - Double_t zz2 = z1+(tantheta)*(layer2C.GetX()-x1); - Int_t index1 = layer1C.FindNearestCluster(yy1,zz1,road); - Int_t index2 = layer2C.FindNearestCluster(yy2,zz2,road); - if (index1>=0) { - clusters1[dlayer]= (AliTRDcluster*)GetCluster(index1); - ncl++; - sum1++; - Double_t dx = layer1C.GetX()-x1; - sumx1 +=dx; - sum2x1+=dx*dx; - sumxy1+=dx*clusters1[dlayer]->GetY(); - sumy1 +=clusters1[dlayer]->GetY(); - } - if (index2>=0) { - clusters2[dlayer]= (AliTRDcluster*)GetCluster(index2); - ncl++; - sum2++; - Double_t dx = layer2C.GetX()-x2; - sumx2 +=dx; - sum2x2+=dx*dx; - sumxy2+=dx*clusters2[dlayer]->GetY(); - sumy2 +=clusters2[dlayer]->GetY(); - } + if (iter==0){ + if (nlayers<6) continue; + if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue; // gold + } + // + if (iter==1){ + if (nlayersGetLayer(ilayerM-dlayer)); //select propagation layers - Double_t yyM = y1+(tanphi) *(layerM.GetX()-x1); - Double_t zzM = z1+(tantheta)*(layerM.GetX()-x1); - Int_t indexM = layerM.FindNearestCluster(yyM,zzM,road); - if (indexM>=0) { - clustersM[dlayer]= (AliTRDcluster*)GetCluster(indexM); - ncl++; - sumM++; - Double_t dx = layerM.GetX()-xm; - sumxM +=dx; - sum2xM+=dx*dx; - sumxyM+=dx*clustersM[dlayer]->GetY(); - sumyM +=clustersM[dlayer]->GetY(); - } + signedseed[index] = kTRUE; + // + Int_t labels[1000], outlab[1000]; + Int_t nlab=0; + for (Int_t iLayer=0;iLayer<6;iLayer++){ + if (seed[index][iLayer].isOK()){ + if (seed[index][iLayer].fLabels[0]>=0) { + labels[nlab] = seed[index][iLayer].fLabels[0]; + nlab++; + } + if (seed[index][iLayer].fLabels[1]>=0) { + labels[nlab] = seed[index][iLayer].fLabels[1]; + nlab++; + } + } } - Double_t detM = sumM*sum2xM-sumxM*sumxM; - Double_t posM=0, angleM=0; - if (TMath::Abs(detM)>0.0000001){ - angleM = (sumM*sumxyM-sumxM*sumyM)/detM; - posM = (sum2xM*sumyM-sumxM*sumxyM)/detM; // at xm + Freq(nlab,labels,outlab,kFALSE); + Int_t label = outlab[0]; + Int_t frequency = outlab[1]; + Freq(nlabelsall,labelsall,outlab,kFALSE); + Int_t label1 = outlab[0]; + Int_t label2 = outlab[2]; + Float_t fakeratio = (naccepted-outlab[1])/Float_t(naccepted); + Float_t ratio = Float_t(nused)/Float_t(ncl); + if (ratio<0.25){ + for (Int_t jLayer=0;jLayer<6;jLayer++){ + if ( seed[index][jLayer].isOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.2 ) + seed[index][jLayer].UseClusters(); //sign gold + } } // - - if (ncl>15){ + Int_t eventNr = esd->GetEventNumber(); + TTreeSRedirector& cstream = *fDebugStreamer; + // + // register seed + // + AliTRDtrack * track = RegisterSeed(seed[index],seedparams[index]); + AliTRDtrack dummy; + if (!track) track=&dummy; + else{ + AliESDtrack esdtrack; + esdtrack.UpdateTrackParams(track, AliESDtrack::kTRDout); + esdtrack.SetLabel(label); + esd->AddTrack(&esdtrack); TTreeSRedirector& cstream = *fDebugStreamer; - cstream<<"Seeds"<< - "Ncl="<GetNumberOfClusters(); for (Int_t i=from; iGetClusterIndex(i); AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index); - c->Use(); + // + Int_t iplane = fGeom->GetPlane(c->GetDetector()); + if (track->fTracklets[iplane].GetChi2()>kmaxchi2) continue; + if (track->fTracklets[iplane].GetN()IsUsed())) c->Use(); } } @@ -2996,10 +3796,11 @@ void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c, //______________________________________________________ -Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const { +Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const { // Returns index of the cluster nearest in Y + if (fN<=0) return 0; if (y <= fClusters[0]->GetY()) return 0; if (y > fClusters[fN-1]->GetY()) return fN; Int_t b=0, e=fN-1, m=(b+e)/2; @@ -3010,27 +3811,24 @@ Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const { return m; } -Int_t AliTRDtracker::AliTRDpropagationLayer::FindNearestCluster(Double_t y, Double_t z, Double_t maxroad) const +Int_t AliTRDtracker::AliTRDpropagationLayer::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad, Float_t maxroadz) const { // // Returns index of the cluster nearest to the given y,z // Int_t index = -1; Int_t maxn = fN; - Double_t mindist = maxroad; - Float_t padlength =-1; + Float_t mindist = maxroad; // for (Int_t i=Find(y-maxroad); iGetSigmaZ2()*12); - } + Float_t ycl = c->GetY(); // - if (c->GetY() > y+maxroad) break; - if((c->GetZ()-z)*(c->GetZ()-z) > padlength*0.75) continue; - if (TMath::Abs(c->GetY()-y)GetY()-y); - index = GetIndex(i); + if (ycl > y+maxroad) break; + if (TMath::Abs(c->GetZ()-z) > maxroadz) continue; + if (TMath::Abs(ycl-y)GetX(); - Double_t sigmaz = TMath::Sqrt(track->GetSigmaZ2()); + Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2())); Int_t nall=0; Int_t nfound=0; Double_t h01 =0; @@ -3301,7 +4098,9 @@ Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack dz[ih][it]=-100; dy[ih][it]=-100; if (!cl[ih][it]) continue; - Float_t poscor = fgkCoef*(cl[ih][it]->GetLocalTimeBin() - fgkMean)+fgkOffset; + //Float_t poscor = fgkCoef*(cl[ih][it]->GetLocalTimeBin() - fgkMean)+fgkOffset; + Float_t poscor = 0; // applied during loading of clusters + if (cl[ih][it]->IsUsed()) poscor=0; // correction already applied dz[ih][it] = cl[ih][it]->GetZ()- zt[it]; // calculate distance from track in z dy[ih][it] = cl[ih][it]->GetY()+ dz[ih][it]*h01 - poscor -yt[it]; // in y } @@ -3398,9 +4197,9 @@ Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack if (!cl[best[iter][it]][it]) continue; // Double_t sigmatr2 = smoffset[iter]+0.5*tany*tany; //add unisochronity + angular effect contribution - Double_t sweight = 1./sigmatr2+1./track->fCyy; + Double_t sweight = 1./sigmatr2+1./track->GetSigmaY2(); Double_t weighty = (moffset[iter]/sigmatr2)/sweight; // weighted mean - Double_t sigmacl = TMath::Sqrt(sigma1*sigma1+track->fCyy); // + Double_t sigmacl = TMath::Sqrt(sigma1*sigma1+track->GetSigmaY2()); // Double_t mindist=100000; Int_t ihbest=0; for (Int_t ih=0;ih<10;ih++){ @@ -3417,7 +4216,7 @@ Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack // // update best hypothesy if better chi2 according tracklet position and angle // - Double_t sy2 = smean[iter] + track->fCyy; + Double_t sy2 = smean[iter] + track->GetSigmaY2(); Double_t sa2 = sangle[iter] + track->fCee; Double_t say = track->fCey; // Double_t chi20 = mean[bestiter]*mean[bestiter]/sy2+angle[bestiter]*angle[bestiter]/sa2; @@ -3458,11 +4257,31 @@ Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack //expectederr+=10000; for (Int_t it=0;itGetLocalTimeBin() - fgkMean)+fgkOffset; + // Float_t poscor = fgkCoef*(cl[best[bestiter][it]][it]->GetLocalTimeBin() - fgkMean)+fgkOffset; + Float_t poscor = 0; //applied during loading of cluster cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // set cluster error if (!cl[best[bestiter][it]][it]->IsUsed()){ cl[best[bestiter][it]][it]->SetY( cl[best[bestiter][it]][it]->GetY()-poscor); // ExB corrction correction - cl[best[bestiter][it]][it]->Use(); + // cl[best[bestiter][it]][it]->Use(); + } + // + // time bins with maximal charge + if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){ + maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ()); + maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin(); + } + + if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){ + if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){ + maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ()); + maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin(); + } + } + if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){ + if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){ + maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ()); + maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin(); + } } // // time bins with maximal charge @@ -3484,6 +4303,7 @@ Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack } } clusters[it+t0] = indexes[best[bestiter][it]][it]; + //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 && cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0] = indexes[best[bestiter][it]][it]; //Test } // // set tracklet parameters @@ -3509,6 +4329,10 @@ Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack // // Debuging part // + TClonesArray array0("AliTRDcluster"); + TClonesArray array1("AliTRDcluster"); + array0.ExpandCreateFast(t1-t0+1); + array1.ExpandCreateFast(t1-t0+1); TTreeSRedirector& cstream = *fDebugStreamer; AliTRDcluster dummy; Double_t dy0[100]; @@ -3551,8 +4375,8 @@ Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack "graph1.="<<&graph1<< // x - y = dy for second closest cluster "graphy.="<<&graphy<< // y position of the track "graphz.="<<&graphz<< // z position of the track - "fCl.="<<&array0<< // closest cluster - "fCl2.="<<&array1<< // second closest cluster + // "fCl.="<<&array0<< // closest cluster + // "fCl2.="<<&array1<< // second closest cluster "maxpos="<GetLabel(ilab)>=0){ + labels[nlab] = fClusters[i]->GetLabel(ilab); + nlab++; + } + } + } + Int_t nlab2 = AliTRDtracker::Freq(nlab,labels,out,kTRUE); + fLabels[0] = out[0]; + if (nlab2>1 && out[3]>1) fLabels[1] =out[2]; +} + +void AliTRDseed::UseClusters() +{ + // + // use clusters + // + for (Int_t i=0;i<25;i++){ + if (!fClusters[i]) continue; + if (!(fClusters[i]->IsUsed())) fClusters[i]->Use(); + } +} + + +void AliTRDseed::Update(){ + // + // + // + const Float_t ratio = 0.8; + const Int_t kClmin = 6; + const Float_t kmaxtan = 2; + if (TMath::Abs(fYref[1])>kmaxtan) return; // too much inclined track + // + Float_t sigmaexp = 0.05+TMath::Abs(fYref[1]*0.25); // expected r.m.s in y direction + Float_t ycrosscor = fPadLength*fTilt*0.5; // y correction for crossing + fNChange =0; + // + Double_t sumw, sumwx,sumwx2; + Double_t sumwy, sumwxy, sumwz,sumwxz; + Int_t zints[25]; // histograming of the z coordinate - get 1 and second max probable coodinates in z + Int_t zouts[50]; // + Float_t allowedz[25]; // allowed z for given time bin + Float_t yres[25]; // residuals from reference + Float_t anglecor = fTilt*fZref[1]; //correction to the angle + // + // + fN=0; fN2 =0; + for (Int_t i=0;i<25;i++){ + yres[i] =10000; + if (!fClusters[i]) continue; + yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y + zints[fN] = Int_t(fZ[i]); + fN++; + } + if (fN12.) zouts[3]=0; // z distance bigger than pad - length + // + Int_t breaktime = -1; + Bool_t mbefore = kFALSE; + Int_t cumul[25][2]; + Int_t counts[2]={0,0}; + // + if (zouts[3]>=3){ + // + // find the break time allowing one chage on pad-rows with maximal numebr of accepted clusters + // + fNChange=1; + for (Int_t i=0;i<25;i++){ + cumul[i][0] = counts[0]; + cumul[i][1] = counts[1]; + if (TMath::Abs(fZ[i]-zouts[0])<2) counts[0]++; + if (TMath::Abs(fZ[i]-zouts[2])<2) counts[1]++; + } + Int_t maxcount = 0; + for (Int_t i=0;i<24;i++) { + Int_t after = cumul[24][0]-cumul[i][0]; + Int_t before = cumul[i][1]; + if (after+before>maxcount) { + maxcount=after+before; + breaktime=i; + mbefore=kFALSE; + } + after = cumul[24][1]-cumul[i][1]; + before = cumul[i][0]; + if (after+before>maxcount) { + maxcount=after+before; + breaktime=i; + mbefore=kTRUE; + } + } + breaktime-=1; + } + for (Int_t i=0;i<25;i++){ + if (i>breaktime) allowedz[i] = mbefore ? zouts[2]:zouts[0]; + if (i<=breaktime) allowedz[i] = (!mbefore) ? zouts[2]:zouts[0]; + } + if ( (allowedz[0]>allowedz[24] && fZref[1]<0) || (allowedz[0]0)){ + // + // tracklet z-direction not in correspondance with track z direction + // + fNChange =0; + for (Int_t i=0;i<25;i++){ + allowedz[i] = zouts[0]; //only longest taken + } + } + // + if (fNChange>0){ + // + // cross pad -row tracklet - take the step change into account + // + for (Int_t i=0;i<25;i++){ + if (!fClusters[i]) continue; + if (TMath::Abs(fZ[i]-allowedz[i])>2) continue; + yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y + if (TMath::Abs(fZ[i]-fZProb)>2){ + if (fZ[i]>fZProb) yres[i]+=fTilt*fPadLength; + if (fZ[i]2) continue; + yres2[fN2] = yres[i]; + fN2++; + } + if (fN22) continue; + if (TMath::Abs(yres[i]-mean)>4.*sigma) continue; + fUsable[i] = kTRUE; + fN2++; + fMPads+=fClusters[i]->GetNPads(); + Float_t weight =1; + if (fClusters[i]->GetNPads()>4) weight=0.5; + if (fClusters[i]->GetNPads()>5) weight=0.2; + // + Double_t x = fX[i]; + sumw+=weight; sumwx+=x*weight; sumwx2+=x*x*weight; + sumwy+=weight*yres[i]; sumwxy+=weight*(yres[i])*x; + sumwz+=weight*fZ[i]; sumwxz+=weight*fZ[i]*x; + } + if (fN20){ + // tracklet on boundary + if (fMeanzfZProb) correction = -ycrosscor; + } + Double_t det = sumw*sumwx2-sumwx*sumwx; + fYfitR[0] = (sumwx2*sumwy-sumwx*sumwxy)/det; + fYfitR[1] = (sumw*sumwxy-sumwx*sumwy)/det; + // + fSigmaY2 =0; + for (Int_t i=0;i<25;i++){ + if (!fUsable[i]) continue; + Float_t delta = yres[i]-fYfitR[0]-fYfitR[1]*fX[i]; + fSigmaY2+=delta*delta; + } + fSigmaY2 = TMath::Sqrt(fSigmaY2/Float_t(fN2-2)); + // + fZfitR[0] = (sumwx2*sumwz-sumwx*sumwxz)/det; + fZfitR[1] = (sumw*sumwxz-sumwx*sumwz)/det; + fZfit[0] = (sumwx2*sumwz-sumwx*sumwxz)/det; + fZfit[1] = (sumw*sumwxz-sumwx*sumwz)/det; + fYfitR[0] += fYref[0]+correction; + fYfitR[1] += fYref[1]; + fYfit[0] = fYfitR[0]; + fYfit[1] = fYfitR[1]; + // + // + UpdateUsed(); +} + + + + + + +void AliTRDseed::UpdateUsed(){ + // + fNUsed =0; + for (Int_t i=0;i<25;i++){ + if (!fClusters[i]) continue; + if ((fClusters[i]->IsUsed())) fNUsed++; + } +} + + +void AliTRDseed::EvaluateUni(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh) +{ + // + // robust estimator in 1D case MI version + // + //for the univariate case + //estimates of location and scatter are returned in mean and sigma parameters + //the algorithm works on the same principle as in multivariate case - + //it finds a subset of size hh with smallest sigma, and then returns mean and + //sigma of this subset + + if (hh==0) + hh=(nvectors+2)/2; + Double_t faclts[]={2.6477,2.5092,2.3826,2.2662,2.1587,2.0589,1.9660,1.879,1.7973,1.7203,1.6473}; + Int_t *index=new Int_t[nvectors]; + TMath::Sort(nvectors, data, index, kFALSE); + // + Int_t nquant = TMath::Min(Int_t(Double_t(((hh*1./nvectors)-0.5)*40))+1, 11); + Double_t factor = faclts[nquant-1]; + // + // + Double_t sumx =0; + Double_t sumx2 =0; + Int_t bestindex = -1; + Double_t bestmean = 0; + Double_t bestsigma = data[index[nvectors-1]]-data[index[0]]; // maximal possible sigma + for (Int_t i=0; icseed[iLayer].fPadLength*0.5+1) + acceptablez = kFALSE; + } + } + if (!acceptablez){ + Double_t zmf = cseed[2].fZref[0]+cseed[2].fZref[1]*(xref2-cseed[2].fX0); + Double_t dzmf = (cseed[2].fZref[1]+ cseed[3].fZref[1])*0.5; + fitterT2.FixParameter(3,zmf); + fitterT2.FixParameter(4,dzmf); + fitterT2.Eval(); + fitterT2.ReleaseParameter(3); + fitterT2.ReleaseParameter(4); + rpolz0 = fitterT2.GetParameter(3); + rpolz1 = fitterT2.GetParameter(4); + } + // + Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT); + Double_t params[3]; + params[0] = fitterT2.GetParameter(0); + params[1] = fitterT2.GetParameter(1); + params[2] = fitterT2.GetParameter(2); + Double_t CR = 1+params[1]*params[1]-params[2]*params[0]; + for (Int_t iLayer = 0; iLayer<6;iLayer++){ + Double_t x = cseed[iLayer].fX0; + Double_t y=0,dy=0, z=0, dz=0; + // y + Double_t res2 = (x*params[0]+params[1]); + res2*=res2; + res2 = 1.-params[2]*params[0]+params[1]*params[1]-res2; + if (res2>=0){ + res2 = TMath::Sqrt(res2); + y = (1-res2)/params[0]; + } + //dy + Double_t x0 = -params[1]/params[0]; + if (-params[2]*params[0]+params[1]*params[1]+1>0){ + Double_t Rm1 = params[0]/TMath::Sqrt(-params[2]*params[0]+params[1]*params[1]+1); + if ( 1./(Rm1*Rm1)-(x-x0)*(x-x0)>0){ + Double_t res = (x-x0)/TMath::Sqrt(1./(Rm1*Rm1)-(x-x0)*(x-x0)); + if (params[0]<0) res*=-1.; + dy = res; + } + } + z = rpolz0+rpolz1*(x-xref2); + dz = rpolz1; + cseed[iLayer].fYref[0] = y; + cseed[iLayer].fYref[1] = dy; + cseed[iLayer].fZref[0] = z; + cseed[iLayer].fZref[1] = dz; + cseed[iLayer].fC = CR; + // + } + return chi2TR; +} diff --git a/TRD/AliTRDtracker.h b/TRD/AliTRDtracker.h index 7537f1981a2..7cdd31a837a 100644 --- a/TRD/AliTRDtracker.h +++ b/TRD/AliTRDtracker.h @@ -26,7 +26,55 @@ const unsigned kMaxClusterPerTimeBin = 7000; const unsigned kZones = 5; const Int_t kTrackingSectors = 18; - +class AliTRDseed : public TObject{ + friend class AliTRDtracker; + public: + AliTRDseed(); // default constructor + ~AliTRDseed(){}; // default constructor + static void EvaluateUni(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh); + static Float_t FitRiemanTilt(AliTRDseed * seed, Bool_t error); + void UseClusters(); // use clusters + void Update(); // update information - without tilt correction + void CookLabels(); // cook label + void UpdateUsed(); + void Reset(); // reset seed + Bool_t isOK(){return fN2>8;} + private: + Float_t fTilt; // tilting angle + Float_t fPadLength; // pad length + Float_t fX0; // x0 position + Float_t fX[25]; // !x position + Float_t fY[25]; // !y position + Float_t fZ[25]; // !z position + Int_t fIndexes[25]; // !indexes + AliTRDcluster *fClusters[25]; // !clusters + Bool_t fUsable[25]; // !indication - usable cluster + Float_t fYref[2]; // reference y + Float_t fZref[2]; // reference z + Float_t fYfit[2]; // y fit position +derivation + Float_t fYfitR[2]; // y fit position +derivation + Float_t fZfit[2]; // z fit position + Float_t fZfitR[2]; // z fit position + Float_t fSigmaY; // "robust" sigma in Y - constant fit + Float_t fSigmaY2; // "robust" sigma in Y - line fit + Float_t fMeanz; // mean vaue of z + Float_t fZProb; // max probbable z + Int_t fLabels[2]; // labels + Int_t fN; // number of associated clusters + Int_t fN2; // number of not crossed + Int_t fNUsed; // number of used clusters + Int_t fFreq; // freq + Int_t fNChange; // change z counter + Float_t fMPads; // mean number of pads per cluster + // global + // + Float_t fC; // curvature + Float_t fCC; // curvature with constrain + Float_t fChi2; // global chi2 + Float_t fChi2Z; // global chi2 + private: + ClassDef(AliTRDseed,1) +}; class AliTRDtracker : public AliTracker { @@ -37,7 +85,7 @@ class AliTRDtracker : public AliTracker { AliTRDtracker(); AliTRDtracker(const TFile *in); virtual ~AliTRDtracker(); - + static Int_t Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down); Int_t Clusters2Tracks(AliESD* event); Int_t PropagateBack(AliESD* event); Int_t RefitInward(AliESD* event); @@ -111,8 +159,8 @@ class AliTRDtracker : public AliTracker { Double_t &dx, Double_t &rho, Double_t &x0, Bool_t &lookForCluster) const; Int_t GetZone( Double_t z) const; - Int_t Find(Double_t y) const; - Int_t FindNearestCluster(Double_t y, Double_t z, Double_t maxroad) const; + Int_t Find(Float_t y) const; + Int_t FindNearestCluster(Float_t y, Float_t z, Float_t maxroad, Float_t maxroad) const; void SetZmax(Int_t cham, Double_t center, Double_t w) { fZc[cham] = center; fZmax[cham] = w; } void SetZ(Double_t* center, Double_t *w, Double_t *wsensitive); @@ -263,9 +311,9 @@ class AliTRDtracker : public AliTracker { static const Int_t fgkLastPlane; // Id of the last (outermost) reference plane private: - + AliTRDtrack * RegisterSeed(AliTRDseed * seeds, Double_t *params); virtual void MakeSeeds(Int_t inner, Int_t outer, Int_t turn); - void MakeSeedsMI(Int_t inner, Int_t outer); + void MakeSeedsMI(Int_t inner, Int_t outer, AliESD *esd=0); Int_t FollowProlongation(AliTRDtrack& t, Int_t rf); Int_t FollowProlongationG(AliTRDtrack& t, Int_t rf);