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

#ifndef CBMSTTGEOMCIRCLE_H
#define CBMSTTGEOMCIRCLE_H 1

#include "CbmSttGeomPoint.h"
#include "CbmSttGeomLine.h"
#include "CbmSttHoughDefines.h"

#include "TObject.h"
#include <iostream>

class CbmSttGeomHelix;


class CbmSttGeomCircle : public TObject
{

 public:
    /** Default constructor **/
    CbmSttGeomCircle();
    
    /** Standard constructor **/
    CbmSttGeomCircle(Double_t xcenter, Double_t yCenter, Double_t radius);
    CbmSttGeomCircle(CbmSttGeomPoint center, Double_t radius);
    CbmSttGeomCircle(CbmSttGeomPoint edgepoint, Double_t radius, Double_t phi);

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

    /** calculate intersection points with a line */
    Int_t IntersectWith(CbmSttGeomLine line, CbmSttGeomPoint &answer1, CbmSttGeomPoint &answer2);
    /** calculate intersection points with a another circle */
    Int_t IntersectWith(CbmSttGeomCircle circle, CbmSttGeomPoint &answer1, CbmSttGeomPoint &answer2);
    
    Double_t DistanceTo(CbmSttGeomPoint myPoint);
    Double_t GetPhi();
    Double_t GetD0();
    Double_t GetXcenter() const {return fXcenter;}
    Double_t GetYcenter() const {return fYcenter;}
    Double_t GetRadius() const {return fRadius;}
    void Transform(Double_t x, Double_t y);

 private:
    Double_t fRadius;
    Double_t fXcenter;
    Double_t fYcenter;
    
    ClassDef(CbmSttGeomCircle,1);
};


#endif