1 #ifndef ALITRACKFITTERSTRAIGHT_H
2 #define ALITRACKFITTERSTRAIGHT_H
4 #include "AliTrackFitter.h"
6 class AliTrackFitterStraight : public AliTrackFitter{
8 AliTrackFitterStraight();
9 AliTrackFitterStraight(AliTrackPointArray *array, Bool_t owner = kTRUE);
10 AliTrackFitterStraight(const AliTrackFitterStraight &fitter);
11 AliTrackFitterStraight &operator =(const AliTrackFitterStraight& fitter);
12 virtual ~AliTrackFitterStraight();
14 Bool_t Fit(const TArrayI *volIdx,const TArrayI *volIdsFit = 0x0,
15 AliGeomManager::ELayerID layerRangeMin = AliGeomManager::kFirstLayer,
16 AliGeomManager::ELayerID layerRangeMax = AliGeomManager::kLastLayer);
17 Bool_t GetPCA(const AliTrackPoint &p, AliTrackPoint &p2) const;
20 void AddPoint(Float_t x, Float_t y, Float_t z, Float_t sy, Float_t sz);
24 Double_t GetYat(Double_t x) const;
25 Double_t GetZat(Double_t x) const;
26 Double_t GetDYat(Double_t x) const;
27 Double_t GetDZat(Double_t x) const;
28 Bool_t GetXYZat(Double_t r, Float_t *xyz) const;
32 Double_t fAlpha; //angle to transform to the fitting coordinate system
33 Double_t fSumXY[5]; //sums for XY part
34 Double_t fSumYY; //sum for YY part
35 Double_t fSumXZ[5]; //sums for XZ part
36 Double_t fSumZZ; //sum for ZZ part
37 Int_t fNUsed; //actual number of space-points used in the fit
38 Bool_t fConv; // indicates convergation
41 Bool_t Begin(Int_t, Int_t) {Reset(); return kTRUE;}
42 Bool_t AddPoint(const AliTrackPoint *) {return kTRUE;}
44 ClassDef(AliTrackFitterStraight,1) // Fast fit of straight tracks