// Author: Anders Vestbo <mailto:vestbo$fi.uib.no>, Uli Frankenfeld <mailto:franken@fi.uib.no>
//*-- Copyright © ASV
+#include "AliL3StandardIncludes.h"
#include "AliL3RootTypes.h"
-
-#include "AliL3Defs.h"
#include "AliL3Logging.h"
#include "AliL3Track.h"
#include "AliL3Transform.h"
#include "AliL3Vertex.h"
-#include <math.h>
+
//_____________________________________________________________
// AliL3Track
fIsLocal=true;
fRowRange[0]=0;
fRowRange[1]=0;
- memset(fHitNumbers,0,176*sizeof(UInt_t));
+ memset(fHitNumbers,0,159*sizeof(UInt_t));
}
void AliL3Track::Set(AliL3Track *tpt){
SetTgl(tpt->GetTgl());
SetCharge(tpt->GetCharge());
SetHits(tpt->GetNHits(),(UInt_t *)tpt->GetHitNumbers());
-
}
Int_t AliL3Track::Compare(const AliL3Track *track) const
{
// Returns total momentum.
return fabs(GetPt())*sqrt(1. + GetTgl()*GetTgl());
-
}
Double_t AliL3Track::GetPseudoRapidity() const
{
return 0.5 * log((GetP() + GetPz()) / (GetP() - GetPz()));
}
+
/*
Double_t AliL3Track::GetEta() const
{
return GetPseudoRapidity();
}
*/
+
Double_t AliL3Track::GetRapidity() const
{
Double_t m_pi = 0.13957;
//If flag tolocal is set, the track is rotated
//to local coordinates.
- AliL3Transform *transform = new AliL3Transform();
Float_t psi[1] = {GetPsi()};
if(!tolocal)
- transform->Local2GlobalAngle(psi,slice);
+ AliL3Transform::Local2GlobalAngle(psi,slice);
else
- transform->Global2LocalAngle(psi,slice);
+ AliL3Transform::Global2LocalAngle(psi,slice);
SetPsi(psi[0]);
Float_t first[3];
first[0] = GetFirstPointX();
first[1] = GetFirstPointY();
first[2] = GetFirstPointZ();
if(!tolocal)
- transform->Local2Global(first,slice);
+ AliL3Transform::Local2Global(first,slice);
else
- transform->Global2Local(first,slice,kTRUE);
+ AliL3Transform::Global2Local(first,slice,kTRUE);
SetFirstPoint(first[0],first[1],first[2]);
Float_t last[3];
last[1] = GetLastPointY();
last[2] = GetLastPointZ();
if(!tolocal)
- transform->Local2Global(last,slice);
+ AliL3Transform::Local2Global(last,slice);
else
- transform->Global2Local(last,slice,kTRUE);
+ AliL3Transform::Global2Local(last,slice,kTRUE);
SetLastPoint(last[0],last[1],last[2]);
Float_t center[3] = {GetCenterX(),GetCenterY(),0};
if(!tolocal)
- transform->Local2Global(center,slice);
+ AliL3Transform::Local2Global(center,slice);
else
- transform->Global2Local(center,slice,kTRUE);
+ AliL3Transform::Global2Local(center,slice,kTRUE);
SetCenterX(center[0]);
SetCenterY(center[1]);
fIsLocal=kFALSE;
else
fIsLocal=kTRUE;
- delete transform;
}
void AliL3Track::CalculateHelix(){
- //Calculate Radius, CenterX and Centery from Psi, X0, Y0
+ //Calculate Radius, CenterX and CenterY from Psi, X0, Y0
//
- fRadius = fPt / (BFACT*BField);
+ fRadius = fPt / (BFACT*AliL3Transform::GetBField());
if(fRadius) fKappa = -fQ*1./fRadius;
else fRadius = 999999; //just zero
Double_t trackPhi0 = fPsi + fQ *0.5 * pi;
//Take the dot product of the tangent vector of the track, and
//vector perpendicular to the padrow.
+ //In order to do this, we need the tangent vector to the track at the
+ //point. This is done by rotating the radius vector by 90 degrees;
+ //rotation matrix: ( 0 1 )
+ // ( -1 0 )
Double_t tangent[2];
- tangent[1] = (xyz[0] - GetCenterX())/GetRadius();
tangent[0] = -1.*(xyz[1] - GetCenterY())/GetRadius();
-
+ tangent[1] = (xyz[0] - GetCenterX())/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]);
+ if(cos_beta > 1) cos_beta=1;
return acos(cos_beta);
-
}
Bool_t AliL3Track::GetCrossingPoint(Int_t padrow,Float_t *xyz)
{
//Assumes the track is given in local coordinates
- AliL3Transform *transform = new AliL3Transform();
-
if(!IsLocal())
{
printf("GetCrossingPoint: Track is given on global coordinates\n");
return false;
}
- Double_t xHit = transform->Row2X(padrow);
+ Double_t xHit = AliL3Transform::Row2X(padrow);
xyz[0] = xHit;
Double_t aa = (xHit - GetCenterX())*(xHit - GetCenterX());
Double_t yHit = xyz[1];
Double_t angle1 = atan2((yHit - GetCenterY()),(xHit - GetCenterX()));
- if(angle1 < 0) angle1 += 2.*Pi;
+ if(angle1 < 0) angle1 += 2.*AliL3Transform::Pi();
Double_t angle2 = atan2((GetFirstPointY() - GetCenterY()),(GetFirstPointX() - GetCenterX()));
- if(angle2 < 0) angle2 += 2.*Pi;
+ if(angle2 < 0) angle2 += 2.*AliL3Transform::Pi();
Double_t diff_angle = angle1 - angle2;
- diff_angle = fmod(diff_angle,2*Pi);
- if((GetCharge()*diff_angle) > 0) diff_angle = diff_angle - GetCharge()*2.*Pi;
+ diff_angle = fmod(diff_angle,2*AliL3Transform::Pi());
+ if((GetCharge()*diff_angle) > 0) diff_angle = diff_angle - GetCharge()*2.*AliL3Transform::Pi();
Double_t s_tot = fabs(diff_angle)*GetRadius();
Double_t zHit = GetFirstPointZ() + s_tot*GetTgl();
xyz[2] = zHit;
- delete transform;
return true;
}
Bool_t AliL3Track::CalculateReferencePoint(Double_t angle,Double_t radius){
- // Global coordinate: crossing point with y = ax+ b; a=tan(angle-Pi/2);
+ // Global coordinate: crossing point with y = ax+ b; a=tan(angle-AliL3Transform::Pi()/2);
//
- const Double_t rr=radius;//132; //position of referece plane
- const Double_t xr = cos(angle) *rr;
- const Double_t yr = sin(angle) *rr;
+ const Double_t rr=radius;//132; //position of reference plane
+ const Double_t xr = cos(angle) * rr;
+ const Double_t yr = sin(angle) * rr;
Double_t a = tan(angle-pi/2);
Double_t b = yr - a * xr;
//Get the z coordinate:
Double_t angle1 = atan2((closest_y-GetCenterY()),(closest_x-GetCenterX()));
- if(angle1 < 0) angle1 = angle1 + 2*Pi;
+ if(angle1 < 0) angle1 = angle1 + 2*AliL3Transform::Pi();
Double_t angle2 = atan2((GetFirstPointY()-GetCenterY()),(GetFirstPointX()-GetCenterX()));
- if(angle2 < 0) angle2 = angle2 + 2*Pi;
+ if(angle2 < 0) angle2 = angle2 + 2*AliL3Transform::Pi();
Double_t diff_angle = angle1 - angle2;
- diff_angle = fmod(diff_angle,2*Pi);
+ diff_angle = fmod(diff_angle,2*AliL3Transform::Pi());
- if((GetCharge()*diff_angle) < 0) diff_angle = diff_angle + GetCharge()*2*Pi;
+ if((GetCharge()*diff_angle) < 0) diff_angle = diff_angle + GetCharge()*2*AliL3Transform::Pi();
Double_t s_tot = fabs(diff_angle)*GetRadius();
closest_z = GetFirstPointZ() - s_tot*GetTgl();
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff