| 1 | #ifndef G__SOLTRK_H
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| 2 | #define G__SOLTRK_H
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| 3 |
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| 4 | #include <TMath.h>
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| 5 | #include <TMatrixDSym.h>
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| 6 |
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| 7 | class SolGeom;
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| 8 |
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| 9 | // Class to store track information
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| 10 | // Assumes that the geometry has been initialized
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| 11 | class SolTrack{
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| 12 | // Track handling class
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| 13 | // Assume tracks originate from (0,0) for the time being
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| 14 | private:
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| 15 | Int_t fNl; // Actual number of layers
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| 16 | SolGeom *fG; // Geometry
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| 17 | Double_t fp[3]; // px, py, pz momentum
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| 18 | Double_t fx[3]; // x, y, z track origin
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| 19 | Double_t fpar[5]; // D, phi0, C, z0, cot(theta)
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| 20 |
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| 21 | TMatrixDSym fCov; // Full covariance matrix
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| 22 |
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| 23 | public:
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| 24 | // Constructors
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| 25 | SolTrack(Double_t *x, Double_t *p, SolGeom *G);
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| 26 | SolTrack(Double_t D, Double_t phi0, Double_t C, Double_t z0, Double_t ct, SolGeom *G);
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| 27 | // Destructor
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| 28 | ~SolTrack();
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| 29 | // Accessors
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| 30 | // Position (at minimum approach)
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| 31 | Double_t x() { return fx[0]; }
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| 32 | Double_t y() { return fx[1]; }
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| 33 | Double_t z() { return fx[2]; }
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| 34 | // Momentum (at minimum approach)
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| 35 | Double_t px() { return fp[0]; }
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| 36 | Double_t py() { return fp[1]; }
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| 37 | Double_t pz() { return fp[2]; }
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| 38 | Double_t pt() { return TMath::Sqrt(fp[0] * fp[0] + fp[1] * fp[1]); }
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| 39 | Double_t p() { return TMath::Sqrt(fp[0] * fp[0] + fp[1] * fp[1] + fp[2] * fp[2]); }
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| 40 | // Track parameters
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| 41 | Double_t D() { return fpar[0]; }
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| 42 | Double_t phi0() { return fpar[1]; }
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| 43 | Double_t C() { return fpar[2]; }
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| 44 | Double_t z0() { return fpar[3]; }
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| 45 | Double_t ct() { return fpar[4]; }
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| 46 | // Covariance
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| 47 | TMatrixDSym Cov() { return fCov; }
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| 48 | // Track parameter covariance calculation
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| 49 | void CovCalc(Bool_t Res, Bool_t MS);
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| 50 | // Parameter errors
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| 51 | Double_t s_D() { return TMath::Sqrt(fCov(0, 0)); }
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| 52 | Double_t s_phi0() { return TMath::Sqrt(fCov(1, 1)); }
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| 53 | Double_t s_C() { return TMath::Sqrt(fCov(2, 2)); }
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| 54 | Double_t s_pt() { return 2 * s_C()*pt() / (0.2998*fG->B()); } // Dpt/pt
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| 55 | Double_t s_z0() { return TMath::Sqrt(fCov(3, 3)); }
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| 56 | Double_t s_ct() { return TMath::Sqrt(fCov(4, 4)); }
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| 57 | // Track hit management
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| 58 | Int_t nHit();
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| 59 | Bool_t HitLayer(Int_t Layer, Double_t &R, Double_t &phi, Double_t &zz);
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| 60 | Int_t HitList(Int_t *&ihh, Double_t *&rhh, Double_t *&zhh);
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| 61 | // Make normalized matrix positive definite
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| 62 | TMatrixDSym MakePosDef(TMatrixDSym NormMat);
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| 63 | };
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| 64 | #endif
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