/** PndTrkTools
 ** 
 ** @author Lia Lavezzi 
 **/

#ifndef PNDTRKTOOLS_H
#define PNDTRKTOOLS_H 1

#include "TVector3.h"
#include "TVector2.h"



class PndTrkTools : public TObject
{
  
 public:    

  PndTrkTools();
  ~PndTrkTools();

  void ComputeLinePointOfTangenceOnACircle(double m, double xc, double yc, double R, double &xi1, double &yi1, double &xi2, double &yi2);
  TVector2 ComputePocaToPointOnCircle2(double x, double y, double xc, double yc, double R);
  TVector3 ComputePocaToPointOnCircle3(double x, double y, double xc, double yc, double R);

  TVector2 ComputePocaToLineOnCircle(double m, double q, double xc, double yc, double R);
  Int_t ComputeSegmentCircleIntersection(TVector2 ex1, TVector2 ex2, double xc, double yc, double R, TVector2 &intersection1, TVector2 &intersection2);
  TVector2 ComputeTangentInPoint(double xc, double yc,  TVector2 point);
  void ComputeTangentInPoint(double xc, double yc,  TVector2 point, double &m, double &p);


  ClassDef(PndTrkTools,1);
};


#endif