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bf9a6ef9 | 1 | #ifndef ALITRACKRESIDUALSLINEAR_H |
2 | #define ALITRACKRESIDUALSLINEAR_H | |
3 | ||
4 | //************************************************************************ | |
5 | // AliTrackResidualsLinear: derived class (from AliTrackResiduals) which * | |
6 | // implements a simple linear minimization of the track residuals chi2. * | |
7 | // The minimization relies on the fact that the alignment parameters * | |
8 | // (angles and translations) are small. * | |
9 | // * | |
10 | // * | |
11 | //************************************************************************ | |
12 | ||
13 | #include "AliAlignObj.h" | |
14 | #include "AliTrackResiduals.h" | |
15 | class TLinearFitter; | |
16 | ||
17 | class AliTrackResidualsLinear : public AliTrackResiduals { | |
18 | ||
19 | public: | |
20 | AliTrackResidualsLinear(); | |
21 | AliTrackResidualsLinear(Int_t ntracks); | |
22 | AliTrackResidualsLinear(const AliTrackResidualsLinear &res); | |
23 | AliTrackResidualsLinear& operator= (const AliTrackResidualsLinear& res); | |
24 | virtual ~AliTrackResidualsLinear(); | |
25 | Bool_t Minimize(); | |
26 | void SetRobust(Float_t fraction){fFraction=fraction;} | |
27 | void FixParameter(Int_t par, Float_t value) {fBFixed[par]=kTRUE; fFixed[par]= value;} | |
dfce6628 | 28 | const Double_t * GetParameters() const { return fParams;} |
29 | const Double_t * GetCovariance() const { return fCovar;} | |
bf9a6ef9 | 30 | void ReleaseParameter(Int_t par) {fBFixed[par]=kFALSE;} |
31 | protected: | |
32 | Bool_t Update(); | |
33 | void AddPoints(AliTrackPoint &p, AliTrackPoint &pprime); | |
34 | TLinearFitter *fFitter; // !Linear fitter | |
35 | Float_t fFraction; // fraction of points for robust fitter if less 0 - no robust fitter invoked | |
dfce6628 | 36 | Double_t fParams[6]; // resulting parameters |
37 | Double_t fCovar[36]; // covariance matrix | |
bf9a6ef9 | 38 | Float_t fFixed[6]; // the fixed values of parameters |
39 | Float_t fBFixed[6]; // the flag for fixing parameter | |
40 | Double_t fChi2Orig; // original chi2 | |
41 | ClassDef(AliTrackResidualsLinear,1) | |
42 | ||
43 | }; | |
44 | ||
45 | #endif |