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source: git/external/TrackCovariance/TrkUtil.h@ 08d82fe

Last change on this file since 08d82fe was df408d2, checked in by Franco BEDESCHI <bed@…>, 4 years ago

Fixed compatibility with ROOT5/minor changes to TrkUtil

  • Property mode set to 100644
File size: 1.6 KB
Line 
1//
2#ifndef G__TRKUTIL_H
3#define G__TRKUTIL_H
4//
5#include <TVector3.h>
6#include <TVectorD.h>
7#include <TMatrixDSym.h>
8//
9//
10// Class test
11
12class TrkUtil {
13 //
14 //
15protected:
16 Double_t fBz; // Solenoid magnetic field
17 //
18 // Service routines
19 //
20 void SetBfield(Double_t Bz) { fBz = Bz; }
21 TVectorD XPtoPar(TVector3 x, TVector3 p, Double_t Q);
22 TVector3 ParToP(TVectorD Par);
23 //
24 // Conversion to ACTS parametrization
25 //
26 TVectorD ParToACTS(TVectorD Par); // Parameter conversion
27 TMatrixDSym CovToACTS(TVectorD Par, TMatrixDSym Cov); // Covariance conversion
28 //
29 // Conversion to ILC parametrization
30 //
31 TVectorD ParToILC(TVectorD Par); // Parameter conversion
32 TMatrixDSym CovToILC(TMatrixDSym Cov); // Covariance conversion
33
34public:
35 //
36 // Constructors
37 TrkUtil();
38 TrkUtil(Double_t Bz);
39 // Destructor
40 ~TrkUtil();
41 //
42 // Overload methods to allow call without instantiating class
43 //
44 static Double_t cSpeed()
45 {
46 Double_t c = 2.99792458e8; // speed of light m/sec
47 //return TMath::C()*1.0e-9; // Incompatible with root5
48 return c*1.0e-9; // Reduced speed of light
49 }
50 //
51 // Service routines
52 //
53 static TVectorD XPtoPar(TVector3 x, TVector3 p, Double_t Q, Double_t Bz);
54 static TVector3 ParToX(TVectorD Par); // position of minimum distance from z axis
55 static TVector3 ParToP(TVectorD Par, Double_t Bz); // Get Momentum from track parameters
56 static Double_t ParToQ(TVectorD Par); // Get track charge
57 //
58 // Conversion from meters to mm
59 //
60 static TVectorD ParToMm(TVectorD Par); // Parameter conversion
61 static TMatrixDSym CovToMm(TMatrixDSym Cov); // Covariance conversion
62
63};
64
65#endif
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