1 #ifndef ALITRACKFITTERRIEMAN_H
2 #define ALITRACKFITTERRIEMAN_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 ///////////////////////////////////////////////////////////////////////////////
10 // Class to the track points on the Riemann sphere. Inputs are
11 // the set of id's (volids) of the volumes in which residuals are
12 // calculated to construct a chi2 function to be minimized during
13 // the alignment procedures
15 //////////////////////////////////////////////////////////////////////////////
17 #include "AliTrackFitter.h"
18 #include "AliRieman.h"
19 class TTreeSRedirector;
22 class AliTrackFitterRieman : public AliTrackFitter{
24 AliTrackFitterRieman();
25 AliTrackFitterRieman(AliTrackPointArray *array, Bool_t owner = kTRUE);
26 AliTrackFitterRieman(const AliTrackFitterRieman &rieman);
27 AliTrackFitterRieman &operator =(const AliTrackFitterRieman& rieman);
28 virtual ~AliTrackFitterRieman();
30 Bool_t Fit(const TArrayI *volIds,const TArrayI *volIdsFit = 0x0,
31 AliGeomManager::ELayerID layerRangeMin = AliGeomManager::kFirstLayer,
32 AliGeomManager::ELayerID layerRangeMax = AliGeomManager::kLastLayer);
33 Bool_t GetPCA(const AliTrackPoint &p, AliTrackPoint &p2) const;
34 void SetMaxDelta(Float_t maxDelta) { fMaxDelta = maxDelta;}
35 Float_t GetMaxDelta() const { return fMaxDelta;}
36 void SetCorrection(Bool_t correction){ fBCorrection=correction;}
37 Bool_t GetCorrection() const {return fBCorrection ;}
39 void AddPoint(Float_t x, Float_t y, Float_t z, Float_t sy, Float_t sz);
42 Double_t GetC() const {return fRieman->GetC();}
43 Double_t GetYat(Double_t x) const;
44 Double_t GetZat(Double_t x) const;
45 Double_t GetDYat(Double_t x) const {return fRieman->GetDYat(x);}
46 Double_t GetDZat(Double_t x) const {return fRieman->GetDZat(x);}
47 Double_t GetErrY2at(Double_t x) const;
48 Double_t GetErrZ2at(Double_t x) const;
50 Bool_t GetXYZat(Double_t r, Float_t *xyz) const {return fRieman->GetXYZat(r, fAlpha,xyz);}
51 AliRieman *GetRieman() const {return fRieman;}
53 // Methods needed in order to use the class
54 // inside the millipede alignment algorithm
55 Double_t GetAlpha() const { return fAlpha; }
56 void SetParam(Int_t i, Double_t par);
58 void SetMinPointRadius(Double_t radius) { fMinPointRadius = radius; }
59 void SetMaxPointRadius(Double_t radius) { fMaxPointRadius = radius; }
60 Double_t GetMinPointRadius() const { return fMinPointRadius; }
61 Double_t GetMaxPointRadius() const { return fMaxPointRadius; }
64 Bool_t fBCorrection; //add correction for non-helicity
65 Double_t fAlpha; //angle to transform to the fitting coordinate system
66 Int_t fNUsed; //actual number of space-points used in the fit
67 Bool_t fConv; //indicates convergation
68 Float_t fMaxDelta; // maximal allowed delta in PCA exported for PCA minimization
69 AliRieman *fRieman; // rieman fitter
70 Double_t fCorrY[4]; // correction polynom coef
71 Double_t fCorrZ[4]; // correction polynom coef
72 Double_t fMinPointRadius; // minimal allowed radius for the point to be included in the fit
73 Double_t fMaxPointRadius; // maximal allowed radius for the point to be included in the fit
75 Bool_t Begin(Int_t, Int_t) {Reset(); return kTRUE;}
76 Bool_t AddPoint(const AliTrackPoint *) {return kTRUE;}
77 TTreeSRedirector *fDebugStream; //!debug streamer
78 ClassDef(AliTrackFitterRieman,3) // Fast fit of helices on ITS RecPoints