Merge branch 'master' into TPCdev
[u/mrichter/AliRoot.git] / STEER / STEER / AliTrackResiduals.h
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98937d93 1#ifndef ALITRACKRESIDUALS_H
2#define ALITRACKRESIDUALS_H
3
4//************************************************************************
5// AliTrackResiduals: base class for collecting the track space point *
6// residuals produced by the fast track fitters (AliTrackFitter class). *
7// It provides an interface to the arrays which contain the space points *
8// and track extrapolation points within the detector volume to be *
9// aligned. The derived classes should implement method to analyze the *
10// track residuals and minimize their sum in order to get the *
11// AliAlignObj for the given detector volume. *
12//************************************************************************
13
14#include "TObject.h"
15
90dbf5fb 16#include "AliAlignObjParams.h"
46ae650f 17
98937d93 18class AliTrackPointArray;
19
20class AliTrackResiduals : public TObject {
21
22 public:
23
24 AliTrackResiduals();
46ae650f 25 AliTrackResiduals(Int_t ntracks);
98937d93 26 AliTrackResiduals(const AliTrackResiduals &res);
27 AliTrackResiduals& operator= (const AliTrackResiduals& res);
28 virtual ~AliTrackResiduals();
29
30 void SetNTracks(Int_t ntracks);
98937d93 31 Bool_t AddTrackPointArrays(AliTrackPointArray *volarray, AliTrackPointArray *trackarray);
cc345ce3 32 void InitAlignObj();
33 void SetMinNPoints(Int_t n) { fMinNPoints = n; }
98937d93 34
35 virtual Bool_t Minimize() = 0;
36
37 Int_t GetNTracks() const { return fN; }
38 Int_t GetNFilledTracks() const { return fLast; }
39 Bool_t GetTrackPointArrays(Int_t i, AliTrackPointArray* &volarray, AliTrackPointArray* &trackarray) const;
40 AliAlignObj *GetAlignObj() const { return fAlignObj; }
46ae650f 41 Float_t GetChi2() const { return fChi2; }
42 Int_t GetNdf() const { return fNdf; }
cc345ce3 43 Int_t GetMinNPoints() const { return fMinNPoints; }
29317b68 44 void FixParameter(Int_t par,Float_t value=0.) {fBFixed[par]=kTRUE; fFixed[par]= value;}
f12d42ce 45 Int_t GetNFreeParam();
29317b68 46 void ReleaseParameter(Int_t par) {fBFixed[par]=kFALSE;}
98937d93 47
48 protected:
49
50 void DeleteTrackPointArrays();
51
52 Int_t fN; // Number of tracks
53 Int_t fLast; // Index of the last filled track arrays
54 AliAlignObj *fAlignObj; // Pointer to the volume alignment object to be fitted
55 AliTrackPointArray **fVolArray; //! Pointers to the arrays containing space points
56 AliTrackPointArray **fTrackArray; //! Pointers to the arrays containing track extrapolation points
46ae650f 57 Float_t fChi2; // Chi2 (or distance) of residuals minimization
58 Int_t fNdf; // Number of degrees of freedom
cc345ce3 59 Int_t fMinNPoints; // Minimum allowed Number of points in the volume which is to be aligned
98937d93 60 Bool_t fIsOwner; // Track point arrays owned by the object
29317b68 61 Float_t fFixed[6]; // The fixed values of parameters
62 Bool_t fBFixed[6]; // The flag for fixing parameter
98937d93 63
29317b68 64 ClassDef(AliTrackResiduals,2)
98937d93 65
66};
67
68#endif