* provided "as is" without express or implied warranty. *
**************************************************************************/
-/* $Id$ */
+/* $Id: AliTRDseedV1.cxx 60233 2013-01-10 09:04:08Z abercuci $ */
////////////////////////////////////////////////////////////////////////////
////
////////////////////////////////////////////////////////////////////////////
#include "TMath.h"
+#include "TGeoManager.h"
#include "TTreeStream.h"
#include "TGraphErrors.h"
//____________________________________________________________________
-Bool_t AliTRDseedV1::GetEstimatedCrossPoint(Float_t &x, Float_t &z) const
+Double_t AliTRDseedV1::EstimatedCrossPoint(AliTRDpadPlane *pp)
{
-// Algorithm to estimate cross point in the x-z plane for pad row cross tracklets.
-// Returns true in case of success.
- if(!IsRowCross()) return kFALSE;
+// Algorithm to estimate cross point in the x-z plane for pad row cross tracklets or the z coordinate of pad row without pad row cross in the local chamber coordinates.
+// Returns variance of the radial offset from anode wire in case of raw cross or 0 otherwise.
- x=0.; z=0.;
+ Int_t row[] = {-1, -1};
+ Double_t zoff(0.5 * (pp->GetRow0() + pp->GetRowEnd())), sx(0.), mean(0.5*pp->GetNrows()-0.5);
AliTRDcluster *c(NULL);
- // Find radial range for first row
- Float_t x1[] = {0., 1.e3};
- for(int ic=0; ic<kNtb; ic++){
- if(!(c=fClusters[ic])) continue;
- if(!c->IsInChamber()) continue;
- if(c->GetX() <= x1[1]) x1[1] = c->GetX();
- if(c->GetX() >= x1[0]) x1[0] = c->GetX();
- z=c->GetZ();
+ fS2Y = 0.;
+
+ if(!IsRowCross()){
+ for(int ic=0; ic<kNtb; ic++){
+ if(!(c=fClusters[ic])) continue;
+ if(!c->IsInChamber()) continue;
+ row[0] = c->GetPadRow();
+ fZfit[0] = Int_t(mean-row[0])*pp->GetLengthIPad() +
+ 0.5*(mean-row[0]>0.?1.:-1.)*(row[0]>0&&row[0]<pp->GetNrows()-1?pp->GetLengthIPad():pp->GetLengthOPad());
+ break;
+ }
+ } else {
+ Float_t tbm[2] = {0.}; // mean value of time bin in rows
+ Int_t tb[kNtb]={0}, //array of time bins from first row
+ nc[2] = {0}, // no. of clusters in rows
+ mc(0); // no. of common clusters
+ Bool_t w[2] = {kFALSE, kFALSE}; // acceptance flag for rows
+ // Find radial range for first row
+ for(int ic(0); ic<kNtb; ic++){
+ tb[ic]= -1;
+ if(!(c=fClusters[ic]) || !c->IsInChamber()) continue;
+ if(row[0]<0) row[0] = c->GetPadRow();
+ tb[nc[0]++] = ic; tbm[0] += ic;
+ }
+ if(nc[0]>2){
+ tbm[0] /= nc[0];
+ w[0] = kTRUE;
+ }
+ // Find radial range for second row
+ for(int ic(kNtb), jc(0); ic<kNclusters; ic++, jc++){
+ if(!(c=fClusters[ic]) || !c->IsInChamber()) continue;
+ if(row[1]<0) row[1] = c->GetPadRow();
+ tbm[1] += jc; nc[1]++;
+ for(Int_t kc(0); kc<nc[0]; kc++)
+ if(tb[kc]==jc){
+ tb[kc] += 100; // mark common cluster
+ mc++;
+ break;
+ }
+ }
+ if(nc[1]>2){
+ tbm[1] /= nc[1];
+ w[1] = kTRUE;
+ }
+ //printf("0 : %f[%2d] 1 : %f[%2d] mc[%d]\n", tbm[0], nc[0], tbm[1], nc[1], mc);
+ if(!w[0] && !w[1]){
+ AliError("Too few clusters to estimate tracklet.");
+ return -1;
+ }
+ if(!w[0] || !w[1]){
+ SetBit(kRowCross, kFALSE); // reset RC bit
+ if(w[1]) row[0] = row[1];
+ fZfit[0] = Int_t(mean-row[0])*pp->GetLengthIPad() +
+ 0.5*(mean-row[0]>0.?1.:-1.)*(row[0]>0&&row[0]<pp->GetNrows()-1?pp->GetLengthIPad():pp->GetLengthOPad());
+ }else{ // find the best matching timebin
+ fZfit[0] = Int_t(mean-0.5*(row[0]+row[1]))*pp->GetLengthIPad();
+ Int_t itb(0), dtb(0);
+ if(!mc) { // no common range
+ itb = Int_t(0.5*(tbm[0] + tbm[1]));
+ dtb = Int_t(0.5*TMath::Abs(tbm[0] - tbm[1])); // simple parameterization of the cluster gap
+ } else {
+ Double_t rmax(100.); Int_t itbStart(-1), itbStop(0);
+ // compute distance from
+ for(Int_t jc(0); jc<nc[0]; jc++){
+ if(tb[jc] < 100) continue;
+ Int_t ltb(tb[jc]-100);
+ Double_t r = (1. - ltb/tbm[0])*(1. - ltb/tbm[1]);
+ //printf("tb[%2d] dr[%f %f %f] rmax[%f]\n", ltb, r, 1. - ltb/tbm[0], 1. - ltb/tbm[1], rmax);
+ if(TMath::Abs(r)<rmax){ rmax = TMath::Abs(r); itb = ltb; }
+ if(itbStart<0) itbStart = ltb;
+ itbStop = ltb;
+ }
+ dtb = itbStop-itbStart+1;
+ }
+ AliTRDCommonParam *cp = AliTRDCommonParam::Instance();
+ Double_t freq(cp?cp->GetSamplingFrequency():10.);
+ fS2Y = ((itb-0.5)/freq - fT0 - 0.189)*fVD; // xOff
+ sx = dtb*0.288675134594812921/freq; sx *= sx; sx += 1.56e-2; sx *= fVD*fVD;
+ }
}
- if((x1[0] - x1[1])<1.e-5) return kFALSE;
- // Find radial range for second row
- Bool_t kZ(kFALSE);
- Float_t x2[] = {0., 1.e3};
- for(int ic=kNtb; ic<kNclusters; ic++){
- if(!(c=fClusters[ic])) continue;
- if(!c->IsInChamber()) continue;
- if(c->GetX() <= x2[1]) x2[1] = c->GetX();
- if(c->GetX() >= x2[0]) x2[0] = c->GetX();
- if(!kZ){
- z+=c->GetZ();
- z*=0.5;
- kZ=kTRUE;
+ // estimate dzdx
+ Float_t dx(fX0-fS2Y);
+ fZfit[1] = (fZfit[0]+zoff)/dx;
+
+ // correct dzdx for the bias
+ UnbiasDZDX(IsRowCross());
+ if(IsRowCross()){
+ // correct x_cross/sigma(x_cross) for the bias in dzdx
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam();
+ if(recoParam){
+ fS2Y += recoParam->GetCorrDZDXxcross()*TMath::Abs(fZfit[1]);
+ sx += recoParam->GetCorrDZDXxcross()*recoParam->GetCorrDZDXxcross()*GetS2DZDX(fZfit[1]);
}
+ // correct sigma(x_cross) for the width of the crossing area
+ sx += GetS2XcrossDZDX(TMath::Abs(fZfit[1]));
+
+ // estimate z and error @ anode wire
+ fZfit[0] += fZfit[1]*fS2Y;
+ fS2Z = fZfit[1]*fZfit[1]*sx+fS2Y*fS2Y*GetS2DZDX(fZfit[1]);
}
- if((x2[0] - x2[1])<1.e-5) return kFALSE;
+ return sx;
+}
- // Find intersection of the 2 radial regions
- x = 0.5*((x1[0]+x1[1] > x2[0]+x2[1]) ? (x1[1]+x2[0]) : (x1[0]+x2[1]));
- return kTRUE;
+//____________________________________________________________________
+void AliTRDseedV1::UnbiasDZDX(Bool_t rc)
+{
+ // correct dzdx for the bias in z according to MC
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam();
+ if(!recoParam) return;
+ fZfit[1] *= recoParam->GetCorrDZDX(rc);
+ if(rc) fZfit[1] += recoParam->GetCorrDZDXbiasRC(fZfit[1]<0);
}
+//____________________________________________________________________
+Double_t AliTRDseedV1::UnbiasY(Bool_t rc, Bool_t sgn, Int_t chg)
+{
+// correct y coordinate for tail cancellation. This should be fixed by considering TC as a function of q/pt.
+// rc : TRUE if tracklet crosses rows
+// sgn : TRUE if track has same sign with magnetic field
+// chg : -1 for negative particles, +1 for the rest
+
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam();
+ if(!recoParam) return 0.;
+ Double_t par[2]={0.};
+ if(rc) recoParam->GetYcorrTailCancel(2, par);
+ else{
+ if(sgn && 1./fPt > 1.5) recoParam->GetYcorrTailCancel(1, par);
+ else if(!sgn) recoParam->GetYcorrTailCancel(0, par);
+ }
+ return par[0]+par[1]*chg/fPt;
+}
+
+
//____________________________________________________________________
Float_t AliTRDseedV1::GetQperTB(Int_t tb) const
{
}
//____________________________________________________________________
-void AliTRDseedV1::GetCovAt(Double_t x, Double_t *cov) const
+void AliTRDseedV1::GetCovAt(Double_t /*x*/, Double_t *cov) const
{
// Computes covariance in the y-z plane at radial point x (in tracking coordinates)
// and returns the results in the preallocated array cov[3] as :
//
- Double_t xr = fX0-x;
- Double_t sy2 = fCov[0] +2.*xr*fCov[1] + xr*xr*fCov[2];
+ //Double_t xr = fX0-x;
+ Double_t sy2 = fCov[0];// +2.*xr*fCov[1] + xr*xr*fCov[2];
Double_t sz2 = fS2Z;
//GetPadLength()*GetPadLength()/12.;
// insert systematic uncertainties
- /* //RS
if(fkReconstructor){
Double_t sys[15]; memset(sys, 0, 15*sizeof(Double_t));
fkReconstructor->GetRecoParam()->GetSysCovMatrix(sys);
- sy2 += sys[0];
- sz2 += sys[1];
+// sy2 += sys[0];
+// sz2 += sys[1];
}
- */
+
// rotate covariance matrix if no RC
if(!IsRowCross()){
Double_t t2 = GetTilt()*GetTilt();
cov[0] = (sy2+t2*sz2)*correction;
cov[1] = GetTilt()*(sz2 - sy2)*correction;
cov[2] = (t2*sy2+sz2)*correction;
- } else {
- cov[0] = sy2; cov[1] = 0.; cov[2] = sy2;
- }
+ } else {
+ cov[0] = sy2; cov[1] = 0.; cov[2] = sz2;
+ }
AliDebug(4, Form("C(%6.1f %+6.3f %6.1f) RC[%c]", 1.e4*TMath::Sqrt(cov[0]), cov[1], 1.e4*TMath::Sqrt(cov[2]), IsRowCross()?'y':'n'));
}
// initialize debug streamer
TTreeSRedirector *pstreamer(NULL);
- if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if((recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming())||
+ AliTRDReconstructor::GetStreamLevel()>30) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
if(pstreamer){
// save config. for calibration
TVectorD vdy[2], vdx[2], vs2[2];
<< "\n";
vdx[0].Clear(); vdy[0].Clear(); vs2[0].Clear();
vdx[1].Clear(); vdy[1].Clear(); vs2[1].Clear();
- if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 4){
+ if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 4 ||AliTRDReconstructor::GetStreamLevel()>4){
Int_t idx(idxRow[1]);
if(idx<0){
for(Int_t ir(0); ir<kNrows; ir++){
}
}
}
- if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 2 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(!pstreamer &&
+ ( (recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 2 && fkReconstructor->IsDebugStreaming()) ||
+ AliTRDReconstructor::GetStreamLevel()>2 )
+ ) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
if(pstreamer){
// save config. for calibration
TVectorD vidx, vn, vx, vy, vr, vs, vsm, vp, vf;
if(f[is]<1.e-2){
AliDebug(1, Form("Seed seg[%d] row[%2d] n[%2d] f[%f]<0.01.", is, idxRow[0], n[0][is], f[is]));
SetErrorMsg(kAttachClAttach);
- if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(!pstreamer &&
+ ( (recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) ||
+ AliTRDReconstructor::GetStreamLevel()>1 )
+ ) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
if(pstreamer){
UChar_t stat(0);
if(IsKink()) SETBIT(stat, 1);
// clear local copy of clusters
for(Int_t ir(0); ir<kNrows; ir++) clst[ir].Clear();
- if(!pstreamer && recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ if(!pstreamer &&
+ ((recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 1 && fkReconstructor->IsDebugStreaming()) ||
+ AliTRDReconstructor::GetStreamLevel()>1 )
+ ) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
if(pstreamer){
UChar_t stat(0);
if(IsKink()) SETBIT(stat, 1);
//____________________________________________________________________
-Bool_t AliTRDseedV1::FitRobust(Bool_t chg)
+Bool_t AliTRDseedV1::FitRobust(AliTRDpadPlane *pp, Bool_t sgn, Int_t chg, Int_t opt)
{
//
// Linear fit of the clusters attached to the tracklet
+// The fit is performed in local chamber coordinates (27.11.2013) to take into account correctly the misalignment
+// Also the pad row cross is checked here and some background is removed
//
// Author
// A.Bercuci <A.Bercuci@gsi.de>
TTreeSRedirector *pstreamer(NULL);
- const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam(); if(recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
+ const AliTRDrecoParam* const recoParam = fkReconstructor->GetRecoParam();
+ if( (recoParam->GetStreamLevel(AliTRDrecoParam::kTracker) > 3 && fkReconstructor->IsDebugStreaming()) ||
+ AliTRDReconstructor::GetStreamLevel()>3 ) pstreamer = fkReconstructor->GetDebugStream(AliTRDrecoParam::kTracker);
// factor to scale y pulls.
// ideally if error parametrization correct this is 1.
if(!attach){
AliWarning("No usable AttachClusters calib object.");
} else {
- // kScalePulls = attach->GetScaleCov();//*lyScaler;
+ //kScalePulls = attach->GetScaleCov();//*lyScaler;
}
// Retrieve chamber status
SetChmbGood(calibration->IsChamberGood(fDet));
if(!IsChmbGood()) kScalePulls*=10.;
}
- Double_t xc[kNclusters], yc[kNclusters], sy[kNclusters];
- Int_t n(0), // clusters used in fit
- row[]={-1, 0}; // pad row spanned by the tracklet
+ AliTRDCommonParam *cp = AliTRDCommonParam::Instance();
+ Double_t freq(cp?cp->GetSamplingFrequency():10.);
+
+ // evaluate locally z and dzdx from TRD only information
+ if(EstimatedCrossPoint(pp)<0.) return kFALSE;
+
+ //printf("D%03d RC[%c] dzdx[%f %f] opt[%d]\n", fDet, IsRowCross()?'y':'n', fZref[1], fZfit[1], opt);
+ Double_t //xchmb = 0.5 * AliTRDgeometry::AmThick() + AliTRDgeometry::DrThick(),
+ //zchmb = 0.5 * (pp->GetRow0() + pp->GetRowEnd()),
+ z0(0.5 * (pp->GetRow0() + pp->GetRowEnd()) + fZfit[0]),
+ DZ(pp->GetRow0() - pp->GetRowEnd() - pp->GetAnodeWireOffset() + fZfit[0]),
+ z, d(-1.);
+ Double_t xc[kNclusters], yc[kNclusters], dz(0.), dzdx(0.),
+ s2dz(0.), s2dzdx(0.), sy[kNclusters],
+ s2x((8.33e-2/freq/freq+1.56e-2)*fVD*fVD), // error of 1tb + error of mean time (TRF)
+ t2(fPad[2]*fPad[2]),
+ cs(0.);
+ Int_t n(0), // clusters used in fit
+ row[]={-1, -1},// pad row spanned by the tracklet
+ col(-1); // pad column of current cluster
+ Double_t ycorr(UnbiasY(IsRowCross(), sgn, chg)),
+ kS2Ycorr(recoParam->GetS2Ycorr(sgn));
+
AliTRDcluster *c(NULL), **jc = &fClusters[0];
for(Int_t ic=0; ic<kNtb; ic++, ++jc) {
if(!(c = (*jc))) continue;
if(!c->IsInChamber()) continue;
if(row[0]<0){
- fZfit[0] = c->GetZ();
- fZfit[1] = 0.;
row[0] = c->GetPadRow();
+ z = pp->GetRowPos(row[0]) - 0.5*pp->GetRowSize(row[0]);
+ switch(opt){
+ case 0: // no dz correction (only for RC tracklet) and dzdx from chamber position assuming primary
+ dzdx = IsRowCross()?fZfit[1]:0.;
+ s2dzdx= IsRowCross()?GetS2DZDX(dzdx):0.;
+ dz = IsRowCross()?(z - z0):0.;
+ s2dz = IsRowCross()?fS2Z:0.;
+ break;
+ case 1: // dz correction only for RC tracklet and dzdx from reference
+ dzdx = fZref[1];
+ dz = IsRowCross()?(z - z0):0.;
+ break;
+ case 2: // full z correction (z0 & dzdx from reference)
+ dzdx = fZref[1];
+ dz = c->GetZ()-fZref[0];
+ break;
+ default:
+ AliError(Form("Wrong option fit %d !", opt));
+ break;
+ }
+ }
+ if(col != c->GetPadCol()){
+ col = c->GetPadCol();
+ cs = pp->GetColSize(col);
+ }
+ //Use local cluster coordinates - the code should be identical with AliTRDtransform::Transform() !!!
+ //A.Bercuci 27.11.13
+ xc[n] = c->GetXloc(fT0, fVD); // c->GetX();
+ yc[n] = c->GetYloc(pp->GetColPos(col) + .5*cs, fS2PRF, cs) - xc[n]*fExB; //c->GetY();
+ yc[n]-= fPad[2]*(dz+xc[n]*dzdx);
+ yc[n]-= ycorr;
+ if(IsRowCross()){ // estimate closest distance to anode wire
+ d = DZ-xc[n]*dzdx;
+ d -= ((Int_t)(2 * d)) / 2.0;
+ if (d > 0.25) d = 0.5 - d;
}
- xc[n] = c->GetX();
- yc[n] = c->GetY();
- sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08;
+ // recalculate cluster error from knowledge of the track inclination in the bending plane
+ // and eventually distance to anode wire
+ c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], d, fYref[1]);
+ s2x = c->GetSX(c->GetLocalTimeBin(), d); s2x*=s2x;
+ sy[n] = c->GetSigmaY2()>0?(TMath::Min(Double_t(c->GetSigmaY2()), 6.4e-3)):6.4e-3;
+ sy[n]+= t2*(s2dz+xc[n]*xc[n]*s2dzdx+dzdx*dzdx*s2x);
+ sy[n] = TMath::Sqrt(sy[n]);
n++;
}
- Double_t corr = fPad[2]*fPad[0];
-
for(Int_t ic=kNtb; ic<kNclusters; ic++, ++jc) {
if(!(c = (*jc))) continue;
if(!c->IsInChamber()) continue;
- if(row[1]==0) row[1] = c->GetPadRow() - row[0];
- xc[n] = c->GetX();
- yc[n] = c->GetY() + corr*row[1];
- sy[n] = c->GetSigmaY2()>0?(TMath::Min(TMath::Sqrt(c->GetSigmaY2()), 0.08)):0.08;
+ if(row[1]<0){
+ row[1] = c->GetPadRow();
+ z = pp->GetRowPos(row[1]) - 0.5*pp->GetRowSize(row[1]);
+ switch(opt){
+ case 0: // no dz correction (only for RC tracklet) and dzdx from chamber position assuming primary
+ //dzdx = fZfit[1];
+ dz = z - z0;
+ break;
+ case 1: // dz correction only for RC tracklet and dzdx from reference
+ //dzdx = fZref[1];
+ dz = z - z0;
+ break;
+ case 2: // full z correction (z0 & dzdx from reference)
+ //dzdx = fZref[1];
+ dz = c->GetZ()-fZref[0];
+ break;
+ default:
+ AliError(Form("Wrong option fit %d !", opt));
+ break;
+ }
+ }
+ if(col != c->GetPadCol()){
+ col = c->GetPadCol();
+ cs = pp->GetColSize(col);
+ }
+ //Use local cluster coordinates - the code should be identical with AliTRDtransform::Transform() !!!
+ //A.Bercuci 27.11.13
+ xc[n] = c->GetXloc(fT0, fVD); // c->GetX();
+ yc[n] = c->GetYloc(pp->GetColPos(col) + .5*cs, fS2PRF, cs) - xc[n]*fExB ;
+ yc[n]-= fPad[2]*(dz+xc[n]*dzdx);
+ yc[n]-= ycorr;
+
+ d = DZ-xc[n]*dzdx;
+ d -= ((Int_t)(2 * d)) / 2.0;
+ if (d > 0.25) d = 0.5 - d;
+ c->SetSigmaY2(fS2PRF, fDiffT, fExB, xc[n], d, fYref[1]);
+ s2x = c->GetSX(c->GetLocalTimeBin(), d); s2x*=s2x;
+ sy[n] = c->GetSigmaY2()>0?(TMath::Min(Double_t(c->GetSigmaY2()), 6.4e-3)):6.4e-3;
+ sy[n]+= t2*(s2dz+xc[n]*xc[n]*s2dzdx+dzdx*dzdx*s2x);
+ sy[n] = TMath::Sqrt(sy[n]);
n++;
}
+
UChar_t status(0);
- Double_t par[3] = {0.,0.,fX0}, cov[3];
+ // the ref radial position is set close to the minimum of
+ // the y variance of the tracklet
+ fX = 0.;//set reference to anode wire
+ Double_t par[3] = {0.,0.,fX}, cov[3];
if(!AliTRDtrackletOflHelper::Fit(n, xc, yc, sy, par, 1.5, cov)){
AliDebug(1, Form("Tracklet fit failed D[%03d].", fDet));
SetErrorMsg(kFitCl);
return kFALSE;
}
- fYfit[0] = par[0];
- fYfit[1] = par[1];
+ fYfit[0] = par[0] - fX * par[1];
+ fYfit[1] = -par[1];
+ //printf(" yfit: %f [%f] x[%e] dydx[%f]\n", fYfit[0], par[0], fX, par[1]);
// store covariance
- fCov[0] = kScalePulls*cov[0]; // variance of y0
+ fCov[0] = kS2Ycorr*cov[0]; // variance of y0
fCov[1] = kScalePulls*cov[2]; // covariance of y0, dydx
fCov[2] = kScalePulls*cov[1]; // variance of dydx
- // the ref radial position is set at the minimum of
- // the y variance of the tracklet
- fX = 0.;//-fCov[1]/fCov[2];
// check radial position
Float_t xs=fX+.5*AliTRDgeometry::CamHght();
if(xs < 0. || xs > AliTRDgeometry::CamHght()+AliTRDgeometry::CdrHght()){
SetErrorMsg(kFitFailedY);
return kFALSE;
}
- fS2Y = fCov[0] + fX*fCov[1];
- fS2Z = fPad[0]*fPad[0]/12.;
- AliDebug(2, Form("[I] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[cm]=%6.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)));
- if(IsRowCross()){
- Float_t x,z;
- if(!GetEstimatedCrossPoint(x,z)){
- AliDebug(2, Form("Failed(I) getting crossing point D[%03d].", fDet));
- SetErrorMsg(kFitFailedY);
- return kTRUE;
- }
- //if(IsPrimary()){
- fZfit[0] = fX0*z/x;
- fZfit[1] = z/x;
- fS2Z = 0.05+0.4*TMath::Abs(fZfit[1]); fS2Z *= fS2Z;
- //}
- AliDebug(2, Form("s2y[%f] s2z[%f]", fS2Y, fS2Z));
- AliDebug(2, Form("[II] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f sy[um]=%6.2f sz[um]=%6.2f dzdx[deg]=%+5.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg(), TMath::Sqrt(fS2Y)*1.e4, TMath::Sqrt(fS2Z)*1.e4, TMath::ATan(fZfit[1])*TMath::RadToDeg()));
+ if(!IsRowCross()){
+ Double_t padEffLength(fPad[0] - TMath::Abs(dzdx));
+ fS2Z = padEffLength*padEffLength/12.;
}
+ AliDebug(2, Form("[I] x[cm]=%6.2f y[cm]=%+5.2f z[cm]=%+6.2f dydx[deg]=%+5.2f", GetX(), GetY(), GetZ(), TMath::ATan(fYfit[1])*TMath::RadToDeg()));
if(pstreamer){
Float_t x= fX0 -fX,
AliMathBase::EvaluateUni(n, dy, m, s, 0);
(*pstreamer) << "FitRobust4"
<< "stat=" << status
- << "chg=" << chg
+ << "opt=" << opt
<< "ncl=" << n
<< "det=" << fDet
<< "x0=" << fX0
return kTRUE;
}
+//___________________________________________________________________
+void AliTRDseedV1::SetXYZ(TGeoHMatrix *mDet)
+{
+// Apply alignment to the local position of tracklet
+// A.Bercuci @ 27.11.2013
+
+ Double_t loc[] = {AliTRDgeometry::AnodePos(), GetLocalY(), fZfit[0]}, trk[3]={0.};
+ mDet->LocalToMaster(loc, trk);
+ fX0 = trk[0];
+ fY = trk[1];
+ fZ = trk[2];
+ return;
+// if(!IsRowCross()){/*fZfit[1] *= 1.09;*/ return;}
+// // recalculate local z coordinate assuming primary track for row cross tracklets
+// Double_t zoff(fZ-fZfit[0]); // no alignment aware !
+// //printf("SetXYZ : zoff[%f] zpp[%f]\n", zoff, zpp);
+// fZfit[0] = fX0*fZfit[1] - zoff;
+// // recalculate tracking coordinates based on the new z coordinate
+// loc[2] = fZfit[0];
+// mDet->LocalToMaster(loc, trk);
+// fX0 = trk[0];
+// fY = trk[1];
+// fZ = trk[2];//-zcorr[stk];
+ //fZfit[1] = /*(IsRowCross()?1.05:1.09)**/fZ/(fX0-fS2Y);
+}
+
+
//___________________________________________________________________
void AliTRDseedV1::Print(Option_t *o) const
{
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff