// -------------------------------------------------------------------------
// -----                  CbmSttGeomLine header file                   -----
// -----                  Created 30/03/06  by R. Castelijns           -----
// -------------------------------------------------------------------------

#ifndef CBMSTTGEOMLINE_H
#define CBMSTTGEOMLINE_H 1

#include "TObject.h"
#include "TCanvas.h"

#include "CbmSttGeomPoint.h"

class CbmSttGeomHelix;

class CbmSttGeomLine : public TObject
{
 public:
    /** Default constructor **/
    CbmSttGeomLine();
    
    /** Standard constructor **/
    CbmSttGeomLine(Double_t x1, Double_t y1, Double_t z1, Double_t x2, Double_t y2, Double_t z2);
    CbmSttGeomLine(CbmSttGeomPoint startPoint, CbmSttGeomPoint endPoint);

    /** Destructor **/
    virtual ~CbmSttGeomLine();

    Double_t GetX1() const {return fX1;}
    Double_t GetY1() const {return fY1;}
    Double_t GetZ1() const {return fZ1;}
    Double_t GetX2() const {return fX2;}
    Double_t GetY2() const {return fY2;}
    Double_t GetZ2() const {return fZ2;}
    Double_t GetD0() const;
    Double_t GetPhi() const;
    Double_t GetTheta() const;

    Bool_t Is2D();
    Bool_t IsParallelToZaxis() const;

    Int_t IntersectWith(CbmSttGeomCircle myCircle, CbmSttGeomPoint &answer1, CbmSttGeomPoint &answer2);

    CbmSttGeomPoint ClosestPointTo(CbmSttGeomPoint myPoint);

    Double_t DistanceTo(CbmSttGeomHelix myHelix);
    Double_t DistanceTo(CbmSttGeomPoint myPoint);

    void Transform(Double_t xtrans, Double_t ytrans, Double_t ztrans);
    void Draw();
    
 private:
    Double_t fX1;
    Double_t fY1;
    Double_t fZ1;
    Double_t fX2;
    Double_t fY2;
    Double_t fZ2;

    ClassDef(CbmSttGeomLine,1);
};


#endif