CgemSegmentFun.h

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#ifndef CGEMSEGMENTFUN_H 
#define CGEMSEGMENTFUN_H 
 
//#include "TrackUtil/Helix.h"
#include "KalFitAlg/helix/Helix.h"
#include "CLHEP/Geometry/Point3D.h"
#include "CLHEP/Matrix/Vector.h"
 
#include <string>
 
 
namespace CgemSegmentFun{
 
     void GetHelixVarBeforeFit(int charge, double& d0, double& phi0, double& omega, double& z0, double& tanl);
     void GetChisqF(CLHEP::HepVector trkpar, HepPoint3D pivot, double& chisq);
     double IntersectCylinder(double r, KalmanFit::Helix helix);
     void fcnTrk(int &npar, double *gin, double &f, double *par, int iflag);
     double fLadder(double x, double delta_phi);
     double fGauss(double x, double mean, double sigma);
     void GetLikelihoodF(CLHEP::HepVector trkpar, HepPoint3D pivot, double& chisq);
     double GetKappaAfterFit(int charge, double* rec_phi);
     HepVector CalculateHelix(CLHEP::HepVector trkpar, HepPoint3D pivot);// added on 2017-02-15, wll
     HepSymMatrix InvC(int iLayer);
     bool DetSquareMatrix(HepMatrix m, double &det);
     double detA(double arcs[10][10],int n);
     bool GetMatrixInverse(double src[10][10],int n,double des[10][10]);
     void getAStart(double arcs[10][10],int n,double ans[10][10]);
     bool InverseSymMatrix(HepSymMatrix m, HepSymMatrix &m_inv);
 
   /*global variables of CGEM Geomtry*/
      extern double rl[3];// middle radius of drift gap
      extern double a_stero[3];
      extern double r_layer[3];
      extern double r_X[3];
      extern double r_V[3];
      extern double x_reso[3];
      extern double v_reso[3];
      extern double v_mean[3];
      extern double phi_reso[3];
      extern double phi_mean[3];
      extern double DeltaPhi[3];
 
   /*global variables of CGEM segment*/
      extern double vec_phi[3];
      extern double vec_z[3];
      extern double vec_v[3];
      extern int nStrip_X[3];
      extern int nStrip_V[3];
 
}
 
 
#endif /* CGEMSEGMENTFUN_H */