-//$Id$
+// @(#) $Id$
// Author: Anders Vestbo <mailto:vestbo@fi.uib.no>
-//*-- Copyright © ASV
+//*-- Copyright © ALICE HLT Group
#include "AliL3StandardIncludes.h"
fIsHelix = true;
fEtaIndex = -1;
fEta = 0;
-
}
AliL3HoughTrack::~AliL3HoughTrack()
{
-
}
void AliL3HoughTrack::Set(AliL3Track *track)
SetCharge(tpt->GetCharge());
SetRowRange(tpt->GetFirstRow(),tpt->GetLastRow());
SetSlice(tpt->GetSlice());
- SetNHits(1);
+ SetHits(tpt->GetNHits(),(UInt_t *)tpt->GetHitNumbers());
return;
fWeight = tpt->GetWeight();
fEta = f;
Double_t theta = 2*atan(exp(-1.*fEta));
- Double_t dipangle = AliL3Transform::Pi()/2 - theta;
+ Double_t dipangle = AliL3Transform::PiHalf() - theta;
Double_t tgl = tan(dipangle);
SetTgl(tgl);
}
-void AliL3HoughTrack::CalculateHelix()
-{
- return;
-}
void AliL3HoughTrack::UpdateToFirstRow()
{
//Update the track parameters to the point where track cross
- //its first padrow.
+ //its first padrow.`
//Get the crossing point with the first padrow:
Float_t xyz[3];
Double_t x0 = GetR0() * cos(GetPhi0()) ;
Double_t y0 = GetR0() * sin(GetPhi0()) ;
*/
- Double_t rc = GetRadius();//fabs(GetPt()) / ( BFACT * AliL3Transform::GetBField() ) ;
- Double_t tPhi0 = GetPsi() + GetCharge() * 0.5 * pi / abs(GetCharge()) ;
+ Double_t rc = GetRadius();//fabs(GetPt()) / AliL3Transform::GetBFieldValue();
+ Double_t tPhi0 = GetPsi() + GetCharge() * AliL3Transform::PiHalf() / abs(GetCharge()) ;
Double_t xc = GetCenterX();//x0 - rc * cos(tPhi0) ;
Double_t yc = GetCenterY();//y0 - rc * sin(tPhi0) ;
Double_t td = atan2(radius*sin(phi) - yc,radius*cos(phi) - xc) ;
//Intersection in z
- if ( td < 0 ) td = td + 2. * pi ;
- Double_t deltat = fmod((-GetCharge()*td + GetCharge()*tPhi0),2*pi) ;
- if ( deltat < 0. ) deltat += 2. * pi ;
- if ( deltat > 2.*pi ) deltat -= 2. * pi ;
+ if ( td < 0 ) td = td + AliL3Transform::TwoPi();
+ Double_t deltat = fmod((-GetCharge()*td + GetCharge()*tPhi0),AliL3Transform::TwoPi());
+ if ( deltat < 0. ) deltat += AliL3Transform::TwoPi();
+ else if ( deltat > AliL3Transform::TwoPi() ) deltat -= AliL3Transform::TwoPi();
Double_t z = GetZ0() + rc * GetTgl() * deltat ;
-
Double_t xExtra = radius * cos(phi) ;
Double_t yExtra = radius * sin(phi) ;
Double_t tPhi = atan2(yExtra-yc,xExtra-xc);
//if ( tPhi < 0 ) tPhi += 2. * M_PI ;
-
- Double_t tPsi = tPhi - GetCharge() * 0.5 * pi / abs(GetCharge()) ;
- if ( tPsi > 2. * pi ) tPsi -= 2. * pi ;
- if ( tPsi < 0. ) tPsi += 2. * pi ;
+ Double_t tPsi = tPhi - GetCharge() * AliL3Transform::PiHalf() / abs(GetCharge()) ;
+ if ( tPsi > AliL3Transform::TwoPi() ) tPsi -= AliL3Transform::TwoPi() ;
+ else if ( tPsi < 0. ) tPsi += AliL3Transform::TwoPi();
//And finally, update the track parameters
SetR0(radius);
fWeight = weight;
fMinDist = 100000;
SetKappa(kappa);
- Double_t pt = fabs(BFACT*AliL3Transform::GetBField()/kappa);
+ Double_t pt = fabs(AliL3Transform::GetBFieldValue()/kappa);
SetPt(pt);
Double_t radius = 1/fabs(kappa);
SetRadius(radius);
//Transform line parameters to coordinate system of slice:
- /*
- D = D + fTransform->Row2X(ref_row)*cos(psi);
+ // D = D + fTransform->Row2X(ref_row)*cos(psi);
fDLine = D;
fPsiLine = psi;
fWeight = weight;
- SetNHits(weight);
+ SetNHits(1);
SetRowRange(rowrange[0],rowrange[1]);
fIsHelix = false;
- */
+
}
void AliL3HoughTrack::SetBestMCid(Int_t mcid,Double_t min_dist)
}
-void AliL3HoughTrack::GetLineCrossingPoint(Int_t padrow,Double_t *xy)
+void AliL3HoughTrack::GetLineCrossingPoint(Int_t padrow,Float_t *xy)
{
- /*
if(fIsHelix)
{
printf("AliL3HoughTrack::GetLineCrossingPoint : Track is not a line\n");
return;
}
- Double_t xhit = fTransform->Row2X(padrow);
- Double_t a = -1/tan(fPsiLine);
- Double_t b = fDLine/sin(fPsiLine);
-
- Double_t yhit = a*xhit + b;
+ Float_t xhit = AliL3Transform::Row2X(padrow) - AliL3Transform::Row2X(GetFirstRow());
+ Float_t a = -1/tan(fPsiLine);
+ Float_t b = fDLine/sin(fPsiLine);
+ Float_t yhit = a*xhit + b;
xy[0] = xhit;
xy[1] = yhit;
- */
-}
-
-/*
-Double_t AliL3HoughTrack::GetCrossingAngle(Int_t padrow)
-{
- //Calculate the crossing angle between track and given padrow.
-
- if(!fIsHelix)
- {
- printf("AliL3HoughTrack::GetCrossingAngle : Track is not a helix\n");
- return 0;
- }
-
- if(!IsLocal())
- {
- printf("Track is not given in local coordinates\n");
- return 0;
- }
-
- Float_t xyz[3];
- if(!GetCrossingPoint(padrow,xyz))
- printf("AliL3HoughTrack::GetCrossingPoint : Track does not cross line!!\n");
-
-
- //Convert center of curvature to local coordinates:
- //Float_t xyz_coc[3] = {GetCenterX(),GetCenterY(),0};
- //fTransform->Global2Local(xyz_coc,slice);
-
- //Take the dot product of the tangent vector of the track, and
- //vector perpendicular to the padrow.
-
- Double_t tangent[2];
- //tangent[1] = (xyz[0] - xyz_coc[0])/GetRadius();
- //tangent[0] = -1.*(xyz[1] - xyz_coc[1])/GetRadius();
- tangent[1] = (xyz[0] - GetCenterX())/GetRadius();
- tangent[0] = -1.*(xyz[1] - GetCenterY())/GetRadius();
-
- Double_t perp_padrow[2] = {1,0}; //locally in slice
-
- Double_t cos_beta = fabs(tangent[0]*perp_padrow[0] + tangent[1]*perp_padrow[1]);
- return acos(cos_beta);
-
-}
-
-Bool_t AliL3HoughTrack::GetCrossingPoint(Int_t padrow,Float_t *xyz)
-{
- //Assumes the track is given in local coordinates
- if(!fIsHelix)
- {
- printf("AliL3HoughTrack::GetCrossingPoint : Track is not a helix\n");
- return 0;
- }
-
-
- if(!IsLocal())
- {
- printf("GetCrossingPoint: Track is given on global coordinates\n");
- return false;
- }
-
- Double_t xHit = fTransform->Row2X(padrow);
-
- //xyz[0] = fTransform->Row2X(padrow);
- xyz[0] = xHit;
- Double_t aa = (xHit - GetCenterX())*(xHit - GetCenterX());
- Double_t r2 = GetRadius()*GetRadius();
- if(aa > r2)
- return false;
-
- Double_t aa2 = sqrt(r2 - aa);
- Double_t y1 = GetCenterY() + aa2;
- Double_t y2 = GetCenterY() - aa2;
- xyz[1] = y1;
- if(fabs(y2) < fabs(y1)) xyz[1] = y2;
- xyz[2] = 0; //only consider transverse plane
-
- return true;
-}
-
-
-Bool_t AliL3HoughTrack::GetCrossingPoint(Int_t slice,Int_t padrow,Float_t *xyz)
-{
- //Calculate the crossing point in transverse plane of this track and given
- //padrow (y = a*x + b). Point is given in local coordinates in slice.
- //Assumes the track is given in global coordinates.
-
- if(!fIsHelix)
- {
- printf("AliL3HoughTrack::GetCrossingPoint : Track is not a helix\n");
- return 0;
- }
-
-
- if(IsLocal())
- {
- printf("GetCrossingPoint: Track is given in local coordintes!!!\n");
- return false;
- }
-
- Double_t padrowradii = fTransform->Row2X(padrow);
-
-
- Float_t rotation_angle = (slice*20)*ToRad;
-
- Float_t cs,sn;
- cs = cos(rotation_angle);
- sn = sin(rotation_angle);
-
- Double_t a = -1.*cs/sn;
- Double_t b = padrowradii/sn;
-
- Double_t ycPrime = GetCenterY() - b ;
- Double_t aa = ( 1. + a * a ) ;
- Double_t bb = -2. * ( GetCenterX() + a * ycPrime ) ;
- Double_t cc = ( GetCenterX() * GetCenterX() + ycPrime * ycPrime - GetRadius() * GetRadius() ) ;
-
- Double_t racine = bb * bb - 4. * aa * cc ;
- if ( racine < 0 ) return false ;
- Double_t rootRacine = sqrt(racine) ;
-
- Double_t oneOverA = 1./aa;
-//
-// First solution
-//
- Double_t x1 = 0.5 * oneOverA * ( -1. * bb + rootRacine ) ;
- Double_t y1 = a * x1 + b ;
- Double_t r1 = sqrt(x1*x1+y1*y1);
-//
-// Second solution
-//
- Double_t x2 = 0.5 * oneOverA * ( -1. * bb - rootRacine ) ;
- Double_t y2 = a * x2 + b ;
- Double_t r2 = sqrt(x2*x2+y2*y2);
-//
-// Choose close to (0,0)
-//
- Double_t xHit ;
- Double_t yHit ;
- if ( r1 < r2 ) {
- xHit = x1 ;
- yHit = y1 ;
- }
- else {
- xHit = x2 ;
- yHit = y2 ;
- }
-
- xyz[0] = xHit;
- xyz[1] = yHit;
- xyz[2] = 0;
-
- fTransform->Global2Local(xyz,slice);
-
- return true;
}
-*/
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff